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Resources/OpenLayers/OpenLayers.mobile.debug.js
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/*
OpenLayers.js -- OpenLayers Map Viewer Library
Copyright (c) 2006-2013 by OpenLayers Contributors
Published under the 2-clause BSD license.
See http://openlayers.org/dev/license.txt for the full text of the license, and http://openlayers.org/dev/authors.txt for full list of contributors.
Includes compressed code under the following licenses:
(For uncompressed versions of the code used, please see the
OpenLayers Github repository: <https://github.com/openlayers/openlayers>)
*/
/**
* Contains XMLHttpRequest.js <http://code.google.com/p/xmlhttprequest/>
* Copyright 2007 Sergey Ilinsky (http://www.ilinsky.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*/
/**
* OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
* Copyright (c) 2006, Yahoo! Inc.
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms, with or
* without modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Yahoo! Inc. nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission of Yahoo! Inc.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* ======================================================================
OpenLayers/SingleFile.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
var OpenLayers = {
/**
* Constant: VERSION_NUMBER
*/
VERSION_NUMBER: "Release 2.13.1",
/**
* Constant: singleFile
* TODO: remove this in 3.0 when we stop supporting build profiles that
* include OpenLayers.js
*/
singleFile: true,
/**
* Method: _getScriptLocation
* Return the path to this script. This is also implemented in
* OpenLayers.js
*
* Returns:
* {String} Path to this script
*/
_getScriptLocation: (function() {
var r = new RegExp("(^|(.*?\\/))(OpenLayers[^\\/]*?\\.js)(\\?|$)"),
s = document.getElementsByTagName('script'),
src, m, l = "";
for(var i=0, len=s.length; i<len; i++) {
src = s[i].getAttribute('src');
if(src) {
m = src.match(r);
if(m) {
l = m[1];
break;
}
}
}
return (function() { return l; });
})(),
/**
* Property: ImgPath
* {String} Set this to the path where control images are stored, a path
* given here must end with a slash. If set to '' (which is the default)
* OpenLayers will use its script location + "img/".
*
* You will need to set this property when you have a singlefile build of
* OpenLayers that either is not named "OpenLayers.js" or if you move
* the file in a way such that the image directory cannot be derived from
* the script location.
*
* If your custom OpenLayers build is named "my-custom-ol.js" and the images
* of OpenLayers are in a folder "/resources/external/images/ol" a correct
* way of including OpenLayers in your HTML would be:
*
* (code)
* <script src="/path/to/my-custom-ol.js" type="text/javascript"></script>
* <script type="text/javascript">
* // tell OpenLayers where the control images are
* // remember the trailing slash
* OpenLayers.ImgPath = "/resources/external/images/ol/";
* </script>
* (end code)
*
* Please remember that when your OpenLayers script is not named
* "OpenLayers.js" you will have to make sure that the default theme is
* loaded into the page by including an appropriate <link>-tag,
* e.g.:
*
* (code)
* <link rel="stylesheet" href="/path/to/default/style.css" type="text/css">
* (end code)
*/
ImgPath : ''
};
/* ======================================================================
OpenLayers/BaseTypes.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/SingleFile.js
*/
/**
* Header: OpenLayers Base Types
* OpenLayers custom string, number and function functions are described here.
*/
/**
* Namespace: OpenLayers.String
* Contains convenience functions for string manipulation.
*/
OpenLayers.String = {
/**
* APIFunction: startsWith
* Test whether a string starts with another string.
*
* Parameters:
* str - {String} The string to test.
* sub - {String} The substring to look for.
*
* Returns:
* {Boolean} The first string starts with the second.
*/
startsWith: function(str, sub) {
return (str.indexOf(sub) == 0);
},
/**
* APIFunction: contains
* Test whether a string contains another string.
*
* Parameters:
* str - {String} The string to test.
* sub - {String} The substring to look for.
*
* Returns:
* {Boolean} The first string contains the second.
*/
contains: function(str, sub) {
return (str.indexOf(sub) != -1);
},
/**
* APIFunction: trim
* Removes leading and trailing whitespace characters from a string.
*
* Parameters:
* str - {String} The (potentially) space padded string. This string is not
* modified.
*
* Returns:
* {String} A trimmed version of the string with all leading and
* trailing spaces removed.
*/
trim: function(str) {
return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
},
/**
* APIFunction: camelize
* Camel-case a hyphenated string.
* Ex. "chicken-head" becomes "chickenHead", and
* "-chicken-head" becomes "ChickenHead".
*
* Parameters:
* str - {String} The string to be camelized. The original is not modified.
*
* Returns:
* {String} The string, camelized
*/
camelize: function(str) {
var oStringList = str.split('-');
var camelizedString = oStringList[0];
for (var i=1, len=oStringList.length; i<len; i++) {
var s = oStringList[i];
camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
}
return camelizedString;
},
/**
* APIFunction: format
* Given a string with tokens in the form ${token}, return a string
* with tokens replaced with properties from the given context
* object. Represent a literal "${" by doubling it, e.g. "${${".
*
* Parameters:
* template - {String} A string with tokens to be replaced. A template
* has the form "literal ${token}" where the token will be replaced
* by the value of context["token"].
* context - {Object} An optional object with properties corresponding
* to the tokens in the format string. If no context is sent, the
* window object will be used.
* args - {Array} Optional arguments to pass to any functions found in
* the context. If a context property is a function, the token
* will be replaced by the return from the function called with
* these arguments.
*
* Returns:
* {String} A string with tokens replaced from the context object.
*/
format: function(template, context, args) {
if(!context) {
context = window;
}
// Example matching:
// str = ${foo.bar}
// match = foo.bar
var replacer = function(str, match) {
var replacement;
// Loop through all subs. Example: ${a.b.c}
// 0 -> replacement = context[a];
// 1 -> replacement = context[a][b];
// 2 -> replacement = context[a][b][c];
var subs = match.split(/\.+/);
for (var i=0; i< subs.length; i++) {
if (i == 0) {
replacement = context;
}
if (replacement === undefined) {
break;
}
replacement = replacement[subs[i]];
}
if(typeof replacement == "function") {
replacement = args ?
replacement.apply(null, args) :
replacement();
}
// If replacement is undefined, return the string 'undefined'.
// This is a workaround for a bugs in browsers not properly
// dealing with non-participating groups in regular expressions:
// http://blog.stevenlevithan.com/archives/npcg-javascript
if (typeof replacement == 'undefined') {
return 'undefined';
} else {
return replacement;
}
};
return template.replace(OpenLayers.String.tokenRegEx, replacer);
},
/**
* Property: tokenRegEx
* Used to find tokens in a string.
* Examples: ${a}, ${a.b.c}, ${a-b}, ${5}
*/
tokenRegEx: /\$\{([\w.]+?)\}/g,
/**
* Property: numberRegEx
* Used to test strings as numbers.
*/
numberRegEx: /^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/,
/**
* APIFunction: isNumeric
* Determine whether a string contains only a numeric value.
*
* Examples:
* (code)
* OpenLayers.String.isNumeric("6.02e23") // true
* OpenLayers.String.isNumeric("12 dozen") // false
* OpenLayers.String.isNumeric("4") // true
* OpenLayers.String.isNumeric(" 4 ") // false
* (end)
*
* Returns:
* {Boolean} String contains only a number.
*/
isNumeric: function(value) {
return OpenLayers.String.numberRegEx.test(value);
},
/**
* APIFunction: numericIf
* Converts a string that appears to be a numeric value into a number.
*
* Parameters:
* value - {String}
* trimWhitespace - {Boolean}
*
* Returns:
* {Number|String} a Number if the passed value is a number, a String
* otherwise.
*/
numericIf: function(value, trimWhitespace) {
var originalValue = value;
if (trimWhitespace === true && value != null && value.replace) {
value = value.replace(/^\s*|\s*$/g, "");
}
return OpenLayers.String.isNumeric(value) ? parseFloat(value) : originalValue;
}
};
/**
* Namespace: OpenLayers.Number
* Contains convenience functions for manipulating numbers.
*/
OpenLayers.Number = {
/**
* Property: decimalSeparator
* Decimal separator to use when formatting numbers.
*/
decimalSeparator: ".",
/**
* Property: thousandsSeparator
* Thousands separator to use when formatting numbers.
*/
thousandsSeparator: ",",
/**
* APIFunction: limitSigDigs
* Limit the number of significant digits on a float.
*
* Parameters:
* num - {Float}
* sig - {Integer}
*
* Returns:
* {Float} The number, rounded to the specified number of significant
* digits.
*/
limitSigDigs: function(num, sig) {
var fig = 0;
if (sig > 0) {
fig = parseFloat(num.toPrecision(sig));
}
return fig;
},
/**
* APIFunction: format
* Formats a number for output.
*
* Parameters:
* num - {Float}
* dec - {Integer} Number of decimal places to round to.
* Defaults to 0. Set to null to leave decimal places unchanged.
* tsep - {String} Thousands separator.
* Default is ",".
* dsep - {String} Decimal separator.
* Default is ".".
*
* Returns:
* {String} A string representing the formatted number.
*/
format: function(num, dec, tsep, dsep) {
dec = (typeof dec != "undefined") ? dec : 0;
tsep = (typeof tsep != "undefined") ? tsep :
OpenLayers.Number.thousandsSeparator;
dsep = (typeof dsep != "undefined") ? dsep :
OpenLayers.Number.decimalSeparator;
if (dec != null) {
num = parseFloat(num.toFixed(dec));
}
var parts = num.toString().split(".");
if (parts.length == 1 && dec == null) {
// integer where we do not want to touch the decimals
dec = 0;
}
var integer = parts[0];
if (tsep) {
var thousands = /(-?[0-9]+)([0-9]{3})/;
while(thousands.test(integer)) {
integer = integer.replace(thousands, "$1" + tsep + "$2");
}
}
var str;
if (dec == 0) {
str = integer;
} else {
var rem = parts.length > 1 ? parts[1] : "0";
if (dec != null) {
rem = rem + new Array(dec - rem.length + 1).join("0");
}
str = integer + dsep + rem;
}
return str;
},
/**
* Method: zeroPad
* Create a zero padded string optionally with a radix for casting numbers.
*
* Parameters:
* num - {Number} The number to be zero padded.
* len - {Number} The length of the string to be returned.
* radix - {Number} An integer between 2 and 36 specifying the base to use
* for representing numeric values.
*/
zeroPad: function(num, len, radix) {
var str = num.toString(radix || 10);
while (str.length < len) {
str = "0" + str;
}
return str;
}
};
/**
* Namespace: OpenLayers.Function
* Contains convenience functions for function manipulation.
*/
OpenLayers.Function = {
/**
* APIFunction: bind
* Bind a function to an object. Method to easily create closures with
* 'this' altered.
*
* Parameters:
* func - {Function} Input function.
* object - {Object} The object to bind to the input function (as this).
*
* Returns:
* {Function} A closure with 'this' set to the passed in object.
*/
bind: function(func, object) {
// create a reference to all arguments past the second one
var args = Array.prototype.slice.apply(arguments, [2]);
return function() {
// Push on any additional arguments from the actual function call.
// These will come after those sent to the bind call.
var newArgs = args.concat(
Array.prototype.slice.apply(arguments, [0])
);
return func.apply(object, newArgs);
};
},
/**
* APIFunction: bindAsEventListener
* Bind a function to an object, and configure it to receive the event
* object as first parameter when called.
*
* Parameters:
* func - {Function} Input function to serve as an event listener.
* object - {Object} A reference to this.
*
* Returns:
* {Function}
*/
bindAsEventListener: function(func, object) {
return function(event) {
return func.call(object, event || window.event);
};
},
/**
* APIFunction: False
* A simple function to that just does "return false". We use this to
* avoid attaching anonymous functions to DOM event handlers, which
* causes "issues" on IE<8.
*
* Usage:
* document.onclick = OpenLayers.Function.False;
*
* Returns:
* {Boolean}
*/
False : function() {
return false;
},
/**
* APIFunction: True
* A simple function to that just does "return true". We use this to
* avoid attaching anonymous functions to DOM event handlers, which
* causes "issues" on IE<8.
*
* Usage:
* document.onclick = OpenLayers.Function.True;
*
* Returns:
* {Boolean}
*/
True : function() {
return true;
},
/**
* APIFunction: Void
* A reusable function that returns ``undefined``.
*
* Returns:
* {undefined}
*/
Void: function() {}
};
/**
* Namespace: OpenLayers.Array
* Contains convenience functions for array manipulation.
*/
OpenLayers.Array = {
/**
* APIMethod: filter
* Filter an array. Provides the functionality of the
* Array.prototype.filter extension to the ECMA-262 standard. Where
* available, Array.prototype.filter will be used.
*
* Based on well known example from http://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter
*
* Parameters:
* array - {Array} The array to be filtered. This array is not mutated.
* Elements added to this array by the callback will not be visited.
* callback - {Function} A function that is called for each element in
* the array. If this function returns true, the element will be
* included in the return. The function will be called with three
* arguments: the element in the array, the index of that element, and
* the array itself. If the optional caller parameter is specified
* the callback will be called with this set to caller.
* caller - {Object} Optional object to be set as this when the callback
* is called.
*
* Returns:
* {Array} An array of elements from the passed in array for which the
* callback returns true.
*/
filter: function(array, callback, caller) {
var selected = [];
if (Array.prototype.filter) {
selected = array.filter(callback, caller);
} else {
var len = array.length;
if (typeof callback != "function") {
throw new TypeError();
}
for(var i=0; i<len; i++) {
if (i in array) {
var val = array[i];
if (callback.call(caller, val, i, array)) {
selected.push(val);
}
}
}
}
return selected;
}
};
/* ======================================================================
OpenLayers/BaseTypes/Class.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/SingleFile.js
*/
/**
* Constructor: OpenLayers.Class
* Base class used to construct all other classes. Includes support for
* multiple inheritance.
*
* This constructor is new in OpenLayers 2.5. At OpenLayers 3.0, the old
* syntax for creating classes and dealing with inheritance
* will be removed.
*
* To create a new OpenLayers-style class, use the following syntax:
* (code)
* var MyClass = OpenLayers.Class(prototype);
* (end)
*
* To create a new OpenLayers-style class with multiple inheritance, use the
* following syntax:
* (code)
* var MyClass = OpenLayers.Class(Class1, Class2, prototype);
* (end)
*
* Note that instanceof reflection will only reveal Class1 as superclass.
*
*/
OpenLayers.Class = function() {
var len = arguments.length;
var P = arguments[0];
var F = arguments[len-1];
var C = typeof F.initialize == "function" ?
F.initialize :
function(){ P.prototype.initialize.apply(this, arguments); };
if (len > 1) {
var newArgs = [C, P].concat(
Array.prototype.slice.call(arguments).slice(1, len-1), F);
OpenLayers.inherit.apply(null, newArgs);
} else {
C.prototype = F;
}
return C;
};
/**
* Function: OpenLayers.inherit
*
* Parameters:
* C - {Object} the class that inherits
* P - {Object} the superclass to inherit from
*
* In addition to the mandatory C and P parameters, an arbitrary number of
* objects can be passed, which will extend C.
*/
OpenLayers.inherit = function(C, P) {
var F = function() {};
F.prototype = P.prototype;
C.prototype = new F;
var i, l, o;
for(i=2, l=arguments.length; i<l; i++) {
o = arguments[i];
if(typeof o === "function") {
o = o.prototype;
}
OpenLayers.Util.extend(C.prototype, o);
}
};
/**
* APIFunction: extend
* Copy all properties of a source object to a destination object. Modifies
* the passed in destination object. Any properties on the source object
* that are set to undefined will not be (re)set on the destination object.
*
* Parameters:
* destination - {Object} The object that will be modified
* source - {Object} The object with properties to be set on the destination
*
* Returns:
* {Object} The destination object.
*/
OpenLayers.Util = OpenLayers.Util || {};
OpenLayers.Util.extend = function(destination, source) {
destination = destination || {};
if (source) {
for (var property in source) {
var value = source[property];
if (value !== undefined) {
destination[property] = value;
}
}
/**
* IE doesn't include the toString property when iterating over an object's
* properties with the for(property in object) syntax. Explicitly check if
* the source has its own toString property.
*/
/*
* FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
* prototype object" when calling hawOwnProperty if the source object
* is an instance of window.Event.
*/
var sourceIsEvt = typeof window.Event == "function"
&& source instanceof window.Event;
if (!sourceIsEvt
&& source.hasOwnProperty && source.hasOwnProperty("toString")) {
destination.toString = source.toString;
}
}
return destination;
};
/* ======================================================================
OpenLayers/BaseTypes/Bounds.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Bounds
* Instances of this class represent bounding boxes. Data stored as left,
* bottom, right, top floats. All values are initialized to null, however,
* you should make sure you set them before using the bounds for anything.
*
* Possible use case:
* (code)
* bounds = new OpenLayers.Bounds();
* bounds.extend(new OpenLayers.LonLat(4,5));
* bounds.extend(new OpenLayers.LonLat(5,6));
* bounds.toBBOX(); // returns 4,5,5,6
* (end)
*/
OpenLayers.Bounds = OpenLayers.Class({
/**
* Property: left
* {Number} Minimum horizontal coordinate.
*/
left: null,
/**
* Property: bottom
* {Number} Minimum vertical coordinate.
*/
bottom: null,
/**
* Property: right
* {Number} Maximum horizontal coordinate.
*/
right: null,
/**
* Property: top
* {Number} Maximum vertical coordinate.
*/
top: null,
/**
* Property: centerLonLat
* {<OpenLayers.LonLat>} A cached center location. This should not be
* accessed directly. Use <getCenterLonLat> instead.
*/
centerLonLat: null,
/**
* Constructor: OpenLayers.Bounds
* Construct a new bounds object. Coordinates can either be passed as four
* arguments, or as a single argument.
*
* Parameters (four arguments):
* left - {Number} The left bounds of the box. Note that for width
* calculations, this is assumed to be less than the right value.
* bottom - {Number} The bottom bounds of the box. Note that for height
* calculations, this is assumed to be less than the top value.
* right - {Number} The right bounds.
* top - {Number} The top bounds.
*
* Parameters (single argument):
* bounds - {Array(Number)} [left, bottom, right, top]
*/
initialize: function(left, bottom, right, top) {
if (OpenLayers.Util.isArray(left)) {
top = left[3];
right = left[2];
bottom = left[1];
left = left[0];
}
if (left != null) {
this.left = OpenLayers.Util.toFloat(left);
}
if (bottom != null) {
this.bottom = OpenLayers.Util.toFloat(bottom);
}
if (right != null) {
this.right = OpenLayers.Util.toFloat(right);
}
if (top != null) {
this.top = OpenLayers.Util.toFloat(top);
}
},
/**
* Method: clone
* Create a cloned instance of this bounds.
*
* Returns:
* {<OpenLayers.Bounds>} A fresh copy of the bounds
*/
clone:function() {
return new OpenLayers.Bounds(this.left, this.bottom,
this.right, this.top);
},
/**
* Method: equals
* Test a two bounds for equivalence.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*
* Returns:
* {Boolean} The passed-in bounds object has the same left,
* right, top, bottom components as this. Note that if bounds
* passed in is null, returns false.
*/
equals:function(bounds) {
var equals = false;
if (bounds != null) {
equals = ((this.left == bounds.left) &&
(this.right == bounds.right) &&
(this.top == bounds.top) &&
(this.bottom == bounds.bottom));
}
return equals;
},
/**
* APIMethod: toString
* Returns a string representation of the bounds object.
*
* Returns:
* {String} String representation of bounds object.
*/
toString:function() {
return [this.left, this.bottom, this.right, this.top].join(",");
},
/**
* APIMethod: toArray
* Returns an array representation of the bounds object.
*
* Returns an array of left, bottom, right, top properties, or -- when the
* optional parameter is true -- an array of the bottom, left, top,
* right properties.
*
* Parameters:
* reverseAxisOrder - {Boolean} Should we reverse the axis order?
*
* Returns:
* {Array} array of left, bottom, right, top
*/
toArray: function(reverseAxisOrder) {
if (reverseAxisOrder === true) {
return [this.bottom, this.left, this.top, this.right];
} else {
return [this.left, this.bottom, this.right, this.top];
}
},
/**
* APIMethod: toBBOX
* Returns a boundingbox-string representation of the bounds object.
*
* Parameters:
* decimal - {Integer} How many significant digits in the bbox coords?
* Default is 6
* reverseAxisOrder - {Boolean} Should we reverse the axis order?
*
* Returns:
* {String} Simple String representation of bounds object.
* (e.g. "5,42,10,45")
*/
toBBOX:function(decimal, reverseAxisOrder) {
if (decimal== null) {
decimal = 6;
}
var mult = Math.pow(10, decimal);
var xmin = Math.round(this.left * mult) / mult;
var ymin = Math.round(this.bottom * mult) / mult;
var xmax = Math.round(this.right * mult) / mult;
var ymax = Math.round(this.top * mult) / mult;
if (reverseAxisOrder === true) {
return ymin + "," + xmin + "," + ymax + "," + xmax;
} else {
return xmin + "," + ymin + "," + xmax + "," + ymax;
}
},
/**
* APIMethod: toGeometry
* Create a new polygon geometry based on this bounds.
*
* Returns:
* {<OpenLayers.Geometry.Polygon>} A new polygon with the coordinates
* of this bounds.
*/
toGeometry: function() {
return new OpenLayers.Geometry.Polygon([
new OpenLayers.Geometry.LinearRing([
new OpenLayers.Geometry.Point(this.left, this.bottom),
new OpenLayers.Geometry.Point(this.right, this.bottom),
new OpenLayers.Geometry.Point(this.right, this.top),
new OpenLayers.Geometry.Point(this.left, this.top)
])
]);
},
/**
* APIMethod: getWidth
* Returns the width of the bounds.
*
* Returns:
* {Float} The width of the bounds (right minus left).
*/
getWidth:function() {
return (this.right - this.left);
},
/**
* APIMethod: getHeight
* Returns the height of the bounds.
*
* Returns:
* {Float} The height of the bounds (top minus bottom).
*/
getHeight:function() {
return (this.top - this.bottom);
},
/**
* APIMethod: getSize
* Returns an <OpenLayers.Size> object of the bounds.
*
* Returns:
* {<OpenLayers.Size>} The size of the bounds.
*/
getSize:function() {
return new OpenLayers.Size(this.getWidth(), this.getHeight());
},
/**
* APIMethod: getCenterPixel
* Returns the <OpenLayers.Pixel> object which represents the center of the
* bounds.
*
* Returns:
* {<OpenLayers.Pixel>} The center of the bounds in pixel space.
*/
getCenterPixel:function() {
return new OpenLayers.Pixel( (this.left + this.right) / 2,
(this.bottom + this.top) / 2);
},
/**
* APIMethod: getCenterLonLat
* Returns the <OpenLayers.LonLat> object which represents the center of the
* bounds.
*
* Returns:
* {<OpenLayers.LonLat>} The center of the bounds in map space.
*/
getCenterLonLat:function() {
if(!this.centerLonLat) {
this.centerLonLat = new OpenLayers.LonLat(
(this.left + this.right) / 2, (this.bottom + this.top) / 2
);
}
return this.centerLonLat;
},
/**
* APIMethod: scale
* Scales the bounds around a pixel or lonlat. Note that the new
* bounds may return non-integer properties, even if a pixel
* is passed.
*
* Parameters:
* ratio - {Float}
* origin - {<OpenLayers.Pixel> or <OpenLayers.LonLat>}
* Default is center.
*
* Returns:
* {<OpenLayers.Bounds>} A new bounds that is scaled by ratio
* from origin.
*/
scale: function(ratio, origin){
if(origin == null){
origin = this.getCenterLonLat();
}
var origx,origy;
// get origin coordinates
if(origin.CLASS_NAME == "OpenLayers.LonLat"){
origx = origin.lon;
origy = origin.lat;
} else {
origx = origin.x;
origy = origin.y;
}
var left = (this.left - origx) * ratio + origx;
var bottom = (this.bottom - origy) * ratio + origy;
var right = (this.right - origx) * ratio + origx;
var top = (this.top - origy) * ratio + origy;
return new OpenLayers.Bounds(left, bottom, right, top);
},
/**
* APIMethod: add
* Shifts the coordinates of the bound by the given horizontal and vertical
* deltas.
*
* (start code)
* var bounds = new OpenLayers.Bounds(0, 0, 10, 10);
* bounds.toString();
* // => "0,0,10,10"
*
* bounds.add(-1.5, 4).toString();
* // => "-1.5,4,8.5,14"
* (end)
*
* This method will throw a TypeError if it is passed null as an argument.
*
* Parameters:
* x - {Float} horizontal delta
* y - {Float} vertical delta
*
* Returns:
* {<OpenLayers.Bounds>} A new bounds whose coordinates are the same as
* this, but shifted by the passed-in x and y values.
*/
add:function(x, y) {
if ( (x == null) || (y == null) ) {
throw new TypeError('Bounds.add cannot receive null values');
}
return new OpenLayers.Bounds(this.left + x, this.bottom + y,
this.right + x, this.top + y);
},
/**
* APIMethod: extend
* Extend the bounds to include the <OpenLayers.LonLat>,
* <OpenLayers.Geometry.Point> or <OpenLayers.Bounds> specified.
*
* Please note that this function assumes that left < right and
* bottom < top.
*
* Parameters:
* object - {<OpenLayers.LonLat>, <OpenLayers.Geometry.Point> or
* <OpenLayers.Bounds>} The object to be included in the new bounds
* object.
*/
extend:function(object) {
if (object) {
switch(object.CLASS_NAME) {
case "OpenLayers.LonLat":
this.extendXY(object.lon, object.lat);
break;
case "OpenLayers.Geometry.Point":
this.extendXY(object.x, object.y);
break;
case "OpenLayers.Bounds":
// clear cached center location
this.centerLonLat = null;
if ( (this.left == null) || (object.left < this.left)) {
this.left = object.left;
}
if ( (this.bottom == null) || (object.bottom < this.bottom) ) {
this.bottom = object.bottom;
}
if ( (this.right == null) || (object.right > this.right) ) {
this.right = object.right;
}
if ( (this.top == null) || (object.top > this.top) ) {
this.top = object.top;
}
break;
}
}
},
/**
* APIMethod: extendXY
* Extend the bounds to include the XY coordinate specified.
*
* Parameters:
* x - {number} The X part of the the coordinate.
* y - {number} The Y part of the the coordinate.
*/
extendXY:function(x, y) {
// clear cached center location
this.centerLonLat = null;
if ((this.left == null) || (x < this.left)) {
this.left = x;
}
if ((this.bottom == null) || (y < this.bottom)) {
this.bottom = y;
}
if ((this.right == null) || (x > this.right)) {
this.right = x;
}
if ((this.top == null) || (y > this.top)) {
this.top = y;
}
},
/**
* APIMethod: containsLonLat
* Returns whether the bounds object contains the given <OpenLayers.LonLat>.
*
* Parameters:
* ll - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
* object with a 'lon' and 'lat' properties.
* options - {Object} Optional parameters
*
* Acceptable options:
* inclusive - {Boolean} Whether or not to include the border.
* Default is true.
* worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, the
* ll will be considered as contained if it exceeds the world bounds,
* but can be wrapped around the dateline so it is contained by this
* bounds.
*
* Returns:
* {Boolean} The passed-in lonlat is within this bounds.
*/
containsLonLat: function(ll, options) {
if (typeof options === "boolean") {
options = {inclusive: options};
}
options = options || {};
var contains = this.contains(ll.lon, ll.lat, options.inclusive),
worldBounds = options.worldBounds;
if (worldBounds && !contains) {
var worldWidth = worldBounds.getWidth();
var worldCenterX = (worldBounds.left + worldBounds.right) / 2;
var worldsAway = Math.round((ll.lon - worldCenterX) / worldWidth);
contains = this.containsLonLat({
lon: ll.lon - worldsAway * worldWidth,
lat: ll.lat
}, {inclusive: options.inclusive});
}
return contains;
},
/**
* APIMethod: containsPixel
* Returns whether the bounds object contains the given <OpenLayers.Pixel>.
*
* Parameters:
* px - {<OpenLayers.Pixel>}
* inclusive - {Boolean} Whether or not to include the border. Default is
* true.
*
* Returns:
* {Boolean} The passed-in pixel is within this bounds.
*/
containsPixel:function(px, inclusive) {
return this.contains(px.x, px.y, inclusive);
},
/**
* APIMethod: contains
* Returns whether the bounds object contains the given x and y.
*
* Parameters:
* x - {Float}
* y - {Float}
* inclusive - {Boolean} Whether or not to include the border. Default is
* true.
*
* Returns:
* {Boolean} Whether or not the passed-in coordinates are within this
* bounds.
*/
contains:function(x, y, inclusive) {
//set default
if (inclusive == null) {
inclusive = true;
}
if (x == null || y == null) {
return false;
}
x = OpenLayers.Util.toFloat(x);
y = OpenLayers.Util.toFloat(y);
var contains = false;
if (inclusive) {
contains = ((x >= this.left) && (x <= this.right) &&
(y >= this.bottom) && (y <= this.top));
} else {
contains = ((x > this.left) && (x < this.right) &&
(y > this.bottom) && (y < this.top));
}
return contains;
},
/**
* APIMethod: intersectsBounds
* Determine whether the target bounds intersects this bounds. Bounds are
* considered intersecting if any of their edges intersect or if one
* bounds contains the other.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>} The target bounds.
* options - {Object} Optional parameters.
*
* Acceptable options:
* inclusive - {Boolean} Treat coincident borders as intersecting. Default
* is true. If false, bounds that do not overlap but only touch at the
* border will not be considered as intersecting.
* worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, two
* bounds will be considered as intersecting if they intersect when
* shifted to within the world bounds. This applies only to bounds that
* cross or are completely outside the world bounds.
*
* Returns:
* {Boolean} The passed-in bounds object intersects this bounds.
*/
intersectsBounds:function(bounds, options) {
if (typeof options === "boolean") {
options = {inclusive: options};
}
options = options || {};
if (options.worldBounds) {
var self = this.wrapDateLine(options.worldBounds);
bounds = bounds.wrapDateLine(options.worldBounds);
} else {
self = this;
}
if (options.inclusive == null) {
options.inclusive = true;
}
var intersects = false;
var mightTouch = (
self.left == bounds.right ||
self.right == bounds.left ||
self.top == bounds.bottom ||
self.bottom == bounds.top
);
// if the two bounds only touch at an edge, and inclusive is false,
// then the bounds don't *really* intersect.
if (options.inclusive || !mightTouch) {
// otherwise, if one of the boundaries even partially contains another,
// inclusive of the edges, then they do intersect.
var inBottom = (
((bounds.bottom >= self.bottom) && (bounds.bottom <= self.top)) ||
((self.bottom >= bounds.bottom) && (self.bottom <= bounds.top))
);
var inTop = (
((bounds.top >= self.bottom) && (bounds.top <= self.top)) ||
((self.top > bounds.bottom) && (self.top < bounds.top))
);
var inLeft = (
((bounds.left >= self.left) && (bounds.left <= self.right)) ||
((self.left >= bounds.left) && (self.left <= bounds.right))
);
var inRight = (
((bounds.right >= self.left) && (bounds.right <= self.right)) ||
((self.right >= bounds.left) && (self.right <= bounds.right))
);
intersects = ((inBottom || inTop) && (inLeft || inRight));
}
// document me
if (options.worldBounds && !intersects) {
var world = options.worldBounds;
var width = world.getWidth();
var selfCrosses = !world.containsBounds(self);
var boundsCrosses = !world.containsBounds(bounds);
if (selfCrosses && !boundsCrosses) {
bounds = bounds.add(-width, 0);
intersects = self.intersectsBounds(bounds, {inclusive: options.inclusive});
} else if (boundsCrosses && !selfCrosses) {
self = self.add(-width, 0);
intersects = bounds.intersectsBounds(self, {inclusive: options.inclusive});
}
}
return intersects;
},
/**
* APIMethod: containsBounds
* Returns whether the bounds object contains the given <OpenLayers.Bounds>.
*
* bounds - {<OpenLayers.Bounds>} The target bounds.
* partial - {Boolean} If any of the target corners is within this bounds
* consider the bounds contained. Default is false. If false, the
* entire target bounds must be contained within this bounds.
* inclusive - {Boolean} Treat shared edges as contained. Default is
* true.
*
* Returns:
* {Boolean} The passed-in bounds object is contained within this bounds.
*/
containsBounds:function(bounds, partial, inclusive) {
if (partial == null) {
partial = false;
}
if (inclusive == null) {
inclusive = true;
}
var bottomLeft = this.contains(bounds.left, bounds.bottom, inclusive);
var bottomRight = this.contains(bounds.right, bounds.bottom, inclusive);
var topLeft = this.contains(bounds.left, bounds.top, inclusive);
var topRight = this.contains(bounds.right, bounds.top, inclusive);
return (partial) ? (bottomLeft || bottomRight || topLeft || topRight)
: (bottomLeft && bottomRight && topLeft && topRight);
},
/**
* APIMethod: determineQuadrant
* Returns the the quadrant ("br", "tr", "tl", "bl") in which the given
* <OpenLayers.LonLat> lies.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
*
* Returns:
* {String} The quadrant ("br" "tr" "tl" "bl") of the bounds in which the
* coordinate lies.
*/
determineQuadrant: function(lonlat) {
var quadrant = "";
var center = this.getCenterLonLat();
quadrant += (lonlat.lat < center.lat) ? "b" : "t";
quadrant += (lonlat.lon < center.lon) ? "l" : "r";
return quadrant;
},
/**
* APIMethod: transform
* Transform the Bounds object from source to dest.
*
* Parameters:
* source - {<OpenLayers.Projection>} Source projection.
* dest - {<OpenLayers.Projection>} Destination projection.
*
* Returns:
* {<OpenLayers.Bounds>} Itself, for use in chaining operations.
*/
transform: function(source, dest) {
// clear cached center location
this.centerLonLat = null;
var ll = OpenLayers.Projection.transform(
{'x': this.left, 'y': this.bottom}, source, dest);
var lr = OpenLayers.Projection.transform(
{'x': this.right, 'y': this.bottom}, source, dest);
var ul = OpenLayers.Projection.transform(
{'x': this.left, 'y': this.top}, source, dest);
var ur = OpenLayers.Projection.transform(
{'x': this.right, 'y': this.top}, source, dest);
this.left = Math.min(ll.x, ul.x);
this.bottom = Math.min(ll.y, lr.y);
this.right = Math.max(lr.x, ur.x);
this.top = Math.max(ul.y, ur.y);
return this;
},
/**
* APIMethod: wrapDateLine
* Wraps the bounds object around the dateline.
*
* Parameters:
* maxExtent - {<OpenLayers.Bounds>}
* options - {Object} Some possible options are:
*
* Allowed Options:
* leftTolerance - {float} Allow for a margin of error
* with the 'left' value of this
* bound.
* Default is 0.
* rightTolerance - {float} Allow for a margin of error
* with the 'right' value of
* this bound.
* Default is 0.
*
* Returns:
* {<OpenLayers.Bounds>} A copy of this bounds, but wrapped around the
* "dateline" (as specified by the borders of
* maxExtent). Note that this function only returns
* a different bounds value if this bounds is
* *entirely* outside of the maxExtent. If this
* bounds straddles the dateline (is part in/part
* out of maxExtent), the returned bounds will always
* cross the left edge of the given maxExtent.
*.
*/
wrapDateLine: function(maxExtent, options) {
options = options || {};
var leftTolerance = options.leftTolerance || 0;
var rightTolerance = options.rightTolerance || 0;
var newBounds = this.clone();
if (maxExtent) {
var width = maxExtent.getWidth();
//shift right?
while (newBounds.left < maxExtent.left &&
newBounds.right - rightTolerance <= maxExtent.left ) {
newBounds = newBounds.add(width, 0);
}
//shift left?
while (newBounds.left + leftTolerance >= maxExtent.right &&
newBounds.right > maxExtent.right ) {
newBounds = newBounds.add(-width, 0);
}
// crosses right only? force left
var newLeft = newBounds.left + leftTolerance;
if (newLeft < maxExtent.right && newLeft > maxExtent.left &&
newBounds.right - rightTolerance > maxExtent.right) {
newBounds = newBounds.add(-width, 0);
}
}
return newBounds;
},
CLASS_NAME: "OpenLayers.Bounds"
});
/**
* APIFunction: fromString
* Alternative constructor that builds a new OpenLayers.Bounds from a
* parameter string.
*
* (begin code)
* OpenLayers.Bounds.fromString("5,42,10,45");
* // => equivalent to ...
* new OpenLayers.Bounds(5, 42, 10, 45);
* (end)
*
* Parameters:
* str - {String} Comma-separated bounds string. (e.g. "5,42,10,45")
* reverseAxisOrder - {Boolean} Does the string use reverse axis order?
*
* Returns:
* {<OpenLayers.Bounds>} New bounds object built from the
* passed-in String.
*/
OpenLayers.Bounds.fromString = function(str, reverseAxisOrder) {
var bounds = str.split(",");
return OpenLayers.Bounds.fromArray(bounds, reverseAxisOrder);
};
/**
* APIFunction: fromArray
* Alternative constructor that builds a new OpenLayers.Bounds from an array.
*
* (begin code)
* OpenLayers.Bounds.fromArray( [5, 42, 10, 45] );
* // => equivalent to ...
* new OpenLayers.Bounds(5, 42, 10, 45);
* (end)
*
* Parameters:
* bbox - {Array(Float)} Array of bounds values (e.g. [5,42,10,45])
* reverseAxisOrder - {Boolean} Does the array use reverse axis order?
*
* Returns:
* {<OpenLayers.Bounds>} New bounds object built from the passed-in Array.
*/
OpenLayers.Bounds.fromArray = function(bbox, reverseAxisOrder) {
return reverseAxisOrder === true ?
new OpenLayers.Bounds(bbox[1], bbox[0], bbox[3], bbox[2]) :
new OpenLayers.Bounds(bbox[0], bbox[1], bbox[2], bbox[3]);
};
/**
* APIFunction: fromSize
* Alternative constructor that builds a new OpenLayers.Bounds from a size.
*
* (begin code)
* OpenLayers.Bounds.fromSize( new OpenLayers.Size(10, 20) );
* // => equivalent to ...
* new OpenLayers.Bounds(0, 20, 10, 0);
* (end)
*
* Parameters:
* size - {<OpenLayers.Size> or Object} <OpenLayers.Size> or an object with
* both 'w' and 'h' properties.
*
* Returns:
* {<OpenLayers.Bounds>} New bounds object built from the passed-in size.
*/
OpenLayers.Bounds.fromSize = function(size) {
return new OpenLayers.Bounds(0,
size.h,
size.w,
0);
};
/**
* Function: oppositeQuadrant
* Get the opposite quadrant for a given quadrant string.
*
* (begin code)
* OpenLayers.Bounds.oppositeQuadrant( "tl" );
* // => "br"
*
* OpenLayers.Bounds.oppositeQuadrant( "tr" );
* // => "bl"
* (end)
*
* Parameters:
* quadrant - {String} two character quadrant shortstring
*
* Returns:
* {String} The opposing quadrant ("br" "tr" "tl" "bl"). For Example, if
* you pass in "bl" it returns "tr", if you pass in "br" it
* returns "tl", etc.
*/
OpenLayers.Bounds.oppositeQuadrant = function(quadrant) {
var opp = "";
opp += (quadrant.charAt(0) == 't') ? 'b' : 't';
opp += (quadrant.charAt(1) == 'l') ? 'r' : 'l';
return opp;
};
/* ======================================================================
OpenLayers/BaseTypes/Element.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Util.js
* @requires OpenLayers/BaseTypes.js
*/
/**
* Namespace: OpenLayers.Element
*/
OpenLayers.Element = {
/**
* APIFunction: visible
*
* Parameters:
* element - {DOMElement}
*
* Returns:
* {Boolean} Is the element visible?
*/
visible: function(element) {
return OpenLayers.Util.getElement(element).style.display != 'none';
},
/**
* APIFunction: toggle
* Toggle the visibility of element(s) passed in
*
* Parameters:
* element - {DOMElement} Actually user can pass any number of elements
*/
toggle: function() {
for (var i=0, len=arguments.length; i<len; i++) {
var element = OpenLayers.Util.getElement(arguments[i]);
var display = OpenLayers.Element.visible(element) ? 'none'
: '';
element.style.display = display;
}
},
/**
* APIFunction: remove
* Remove the specified element from the DOM.
*
* Parameters:
* element - {DOMElement}
*/
remove: function(element) {
element = OpenLayers.Util.getElement(element);
element.parentNode.removeChild(element);
},
/**
* APIFunction: getHeight
*
* Parameters:
* element - {DOMElement}
*
* Returns:
* {Integer} The offset height of the element passed in
*/
getHeight: function(element) {
element = OpenLayers.Util.getElement(element);
return element.offsetHeight;
},
/**
* Function: hasClass
* Tests if an element has the given CSS class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to search for.
*
* Returns:
* {Boolean} The element has the given class name.
*/
hasClass: function(element, name) {
var names = element.className;
return (!!names && new RegExp("(^|\\s)" + name + "(\\s|$)").test(names));
},
/**
* Function: addClass
* Add a CSS class name to an element. Safe where element already has
* the class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to add.
*
* Returns:
* {DOMElement} The element.
*/
addClass: function(element, name) {
if(!OpenLayers.Element.hasClass(element, name)) {
element.className += (element.className ? " " : "") + name;
}
return element;
},
/**
* Function: removeClass
* Remove a CSS class name from an element. Safe where element does not
* have the class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to remove.
*
* Returns:
* {DOMElement} The element.
*/
removeClass: function(element, name) {
var names = element.className;
if(names) {
element.className = OpenLayers.String.trim(
names.replace(
new RegExp("(^|\\s+)" + name + "(\\s+|$)"), " "
)
);
}
return element;
},
/**
* Function: toggleClass
* Remove a CSS class name from an element if it exists. Add the class name
* if it doesn't exist.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to toggle.
*
* Returns:
* {DOMElement} The element.
*/
toggleClass: function(element, name) {
if(OpenLayers.Element.hasClass(element, name)) {
OpenLayers.Element.removeClass(element, name);
} else {
OpenLayers.Element.addClass(element, name);
}
return element;
},
/**
* APIFunction: getStyle
*
* Parameters:
* element - {DOMElement}
* style - {?}
*
* Returns:
* {?}
*/
getStyle: function(element, style) {
element = OpenLayers.Util.getElement(element);
var value = null;
if (element && element.style) {
value = element.style[OpenLayers.String.camelize(style)];
if (!value) {
if (document.defaultView &&
document.defaultView.getComputedStyle) {
var css = document.defaultView.getComputedStyle(element, null);
value = css ? css.getPropertyValue(style) : null;
} else if (element.currentStyle) {
value = element.currentStyle[OpenLayers.String.camelize(style)];
}
}
var positions = ['left', 'top', 'right', 'bottom'];
if (window.opera &&
(OpenLayers.Util.indexOf(positions,style) != -1) &&
(OpenLayers.Element.getStyle(element, 'position') == 'static')) {
value = 'auto';
}
}
return value == 'auto' ? null : value;
}
};
/* ======================================================================
OpenLayers/BaseTypes/LonLat.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.LonLat
* This class represents a longitude and latitude pair
*/
OpenLayers.LonLat = OpenLayers.Class({
/**
* APIProperty: lon
* {Float} The x-axis coodinate in map units
*/
lon: 0.0,
/**
* APIProperty: lat
* {Float} The y-axis coordinate in map units
*/
lat: 0.0,
/**
* Constructor: OpenLayers.LonLat
* Create a new map location. Coordinates can be passed either as two
* arguments, or as a single argument.
*
* Parameters (two arguments):
* lon - {Number} The x-axis coordinate in map units. If your map is in
* a geographic projection, this will be the Longitude. Otherwise,
* it will be the x coordinate of the map location in your map units.
* lat - {Number} The y-axis coordinate in map units. If your map is in
* a geographic projection, this will be the Latitude. Otherwise,
* it will be the y coordinate of the map location in your map units.
*
* Parameters (single argument):
* location - {Array(Float)} [lon, lat]
*/
initialize: function(lon, lat) {
if (OpenLayers.Util.isArray(lon)) {
lat = lon[1];
lon = lon[0];
}
this.lon = OpenLayers.Util.toFloat(lon);
this.lat = OpenLayers.Util.toFloat(lat);
},
/**
* Method: toString
* Return a readable string version of the lonlat
*
* Returns:
* {String} String representation of OpenLayers.LonLat object.
* (e.g. <i>"lon=5,lat=42"</i>)
*/
toString:function() {
return ("lon=" + this.lon + ",lat=" + this.lat);
},
/**
* APIMethod: toShortString
*
* Returns:
* {String} Shortened String representation of OpenLayers.LonLat object.
* (e.g. <i>"5, 42"</i>)
*/
toShortString:function() {
return (this.lon + ", " + this.lat);
},
/**
* APIMethod: clone
*
* Returns:
* {<OpenLayers.LonLat>} New OpenLayers.LonLat object with the same lon
* and lat values
*/
clone:function() {
return new OpenLayers.LonLat(this.lon, this.lat);
},
/**
* APIMethod: add
*
* Parameters:
* lon - {Float}
* lat - {Float}
*
* Returns:
* {<OpenLayers.LonLat>} A new OpenLayers.LonLat object with the lon and
* lat passed-in added to this's.
*/
add:function(lon, lat) {
if ( (lon == null) || (lat == null) ) {
throw new TypeError('LonLat.add cannot receive null values');
}
return new OpenLayers.LonLat(this.lon + OpenLayers.Util.toFloat(lon),
this.lat + OpenLayers.Util.toFloat(lat));
},
/**
* APIMethod: equals
*
* Parameters:
* ll - {<OpenLayers.LonLat>}
*
* Returns:
* {Boolean} Boolean value indicating whether the passed-in
* <OpenLayers.LonLat> object has the same lon and lat
* components as this.
* Note: if ll passed in is null, returns false
*/
equals:function(ll) {
var equals = false;
if (ll != null) {
equals = ((this.lon == ll.lon && this.lat == ll.lat) ||
(isNaN(this.lon) && isNaN(this.lat) && isNaN(ll.lon) && isNaN(ll.lat)));
}
return equals;
},
/**
* APIMethod: transform
* Transform the LonLat object from source to dest. This transformation is
* *in place*: if you want a *new* lonlat, use .clone() first.
*
* Parameters:
* source - {<OpenLayers.Projection>} Source projection.
* dest - {<OpenLayers.Projection>} Destination projection.
*
* Returns:
* {<OpenLayers.LonLat>} Itself, for use in chaining operations.
*/
transform: function(source, dest) {
var point = OpenLayers.Projection.transform(
{'x': this.lon, 'y': this.lat}, source, dest);
this.lon = point.x;
this.lat = point.y;
return this;
},
/**
* APIMethod: wrapDateLine
*
* Parameters:
* maxExtent - {<OpenLayers.Bounds>}
*
* Returns:
* {<OpenLayers.LonLat>} A copy of this lonlat, but wrapped around the
* "dateline" (as specified by the borders of
* maxExtent)
*/
wrapDateLine: function(maxExtent) {
var newLonLat = this.clone();
if (maxExtent) {
//shift right?
while (newLonLat.lon < maxExtent.left) {
newLonLat.lon += maxExtent.getWidth();
}
//shift left?
while (newLonLat.lon > maxExtent.right) {
newLonLat.lon -= maxExtent.getWidth();
}
}
return newLonLat;
},
CLASS_NAME: "OpenLayers.LonLat"
});
/**
* Function: fromString
* Alternative constructor that builds a new <OpenLayers.LonLat> from a
* parameter string
*
* Parameters:
* str - {String} Comma-separated Lon,Lat coordinate string.
* (e.g. <i>"5,40"</i>)
*
* Returns:
* {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the
* passed-in String.
*/
OpenLayers.LonLat.fromString = function(str) {
var pair = str.split(",");
return new OpenLayers.LonLat(pair[0], pair[1]);
};
/**
* Function: fromArray
* Alternative constructor that builds a new <OpenLayers.LonLat> from an
* array of two numbers that represent lon- and lat-values.
*
* Parameters:
* arr - {Array(Float)} Array of lon/lat values (e.g. [5,-42])
*
* Returns:
* {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the
* passed-in array.
*/
OpenLayers.LonLat.fromArray = function(arr) {
var gotArr = OpenLayers.Util.isArray(arr),
lon = gotArr && arr[0],
lat = gotArr && arr[1];
return new OpenLayers.LonLat(lon, lat);
};
/* ======================================================================
OpenLayers/BaseTypes/Pixel.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Pixel
* This class represents a screen coordinate, in x and y coordinates
*/
OpenLayers.Pixel = OpenLayers.Class({
/**
* APIProperty: x
* {Number} The x coordinate
*/
x: 0.0,
/**
* APIProperty: y
* {Number} The y coordinate
*/
y: 0.0,
/**
* Constructor: OpenLayers.Pixel
* Create a new OpenLayers.Pixel instance
*
* Parameters:
* x - {Number} The x coordinate
* y - {Number} The y coordinate
*
* Returns:
* An instance of OpenLayers.Pixel
*/
initialize: function(x, y) {
this.x = parseFloat(x);
this.y = parseFloat(y);
},
/**
* Method: toString
* Cast this object into a string
*
* Returns:
* {String} The string representation of Pixel. ex: "x=200.4,y=242.2"
*/
toString:function() {
return ("x=" + this.x + ",y=" + this.y);
},
/**
* APIMethod: clone
* Return a clone of this pixel object
*
* Returns:
* {<OpenLayers.Pixel>} A clone pixel
*/
clone:function() {
return new OpenLayers.Pixel(this.x, this.y);
},
/**
* APIMethod: equals
* Determine whether one pixel is equivalent to another
*
* Parameters:
* px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
*
* Returns:
* {Boolean} The point passed in as parameter is equal to this. Note that
* if px passed in is null, returns false.
*/
equals:function(px) {
var equals = false;
if (px != null) {
equals = ((this.x == px.x && this.y == px.y) ||
(isNaN(this.x) && isNaN(this.y) && isNaN(px.x) && isNaN(px.y)));
}
return equals;
},
/**
* APIMethod: distanceTo
* Returns the distance to the pixel point passed in as a parameter.
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*
* Returns:
* {Float} The pixel point passed in as parameter to calculate the
* distance to.
*/
distanceTo:function(px) {
return Math.sqrt(
Math.pow(this.x - px.x, 2) +
Math.pow(this.y - px.y, 2)
);
},
/**
* APIMethod: add
*
* Parameters:
* x - {Integer}
* y - {Integer}
*
* Returns:
* {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the
* values passed in.
*/
add:function(x, y) {
if ( (x == null) || (y == null) ) {
throw new TypeError('Pixel.add cannot receive null values');
}
return new OpenLayers.Pixel(this.x + x, this.y + y);
},
/**
* APIMethod: offset
*
* Parameters
* px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
*
* Returns:
* {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the
* x&y values of the pixel passed in.
*/
offset:function(px) {
var newPx = this.clone();
if (px) {
newPx = this.add(px.x, px.y);
}
return newPx;
},
CLASS_NAME: "OpenLayers.Pixel"
});
/* ======================================================================
OpenLayers/BaseTypes/Size.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Size
* Instances of this class represent a width/height pair
*/
OpenLayers.Size = OpenLayers.Class({
/**
* APIProperty: w
* {Number} width
*/
w: 0.0,
/**
* APIProperty: h
* {Number} height
*/
h: 0.0,
/**
* Constructor: OpenLayers.Size
* Create an instance of OpenLayers.Size
*
* Parameters:
* w - {Number} width
* h - {Number} height
*/
initialize: function(w, h) {
this.w = parseFloat(w);
this.h = parseFloat(h);
},
/**
* Method: toString
* Return the string representation of a size object
*
* Returns:
* {String} The string representation of OpenLayers.Size object.
* (e.g. <i>"w=55,h=66"</i>)
*/
toString:function() {
return ("w=" + this.w + ",h=" + this.h);
},
/**
* APIMethod: clone
* Create a clone of this size object
*
* Returns:
* {<OpenLayers.Size>} A new OpenLayers.Size object with the same w and h
* values
*/
clone:function() {
return new OpenLayers.Size(this.w, this.h);
},
/**
*
* APIMethod: equals
* Determine where this size is equal to another
*
* Parameters:
* sz - {<OpenLayers.Size>|Object} An OpenLayers.Size or an object with
* a 'w' and 'h' properties.
*
* Returns:
* {Boolean} The passed in size has the same h and w properties as this one.
* Note that if sz passed in is null, returns false.
*/
equals:function(sz) {
var equals = false;
if (sz != null) {
equals = ((this.w == sz.w && this.h == sz.h) ||
(isNaN(this.w) && isNaN(this.h) && isNaN(sz.w) && isNaN(sz.h)));
}
return equals;
},
CLASS_NAME: "OpenLayers.Size"
});
/* ======================================================================
OpenLayers/Console.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Namespace: OpenLayers.Console
* The OpenLayers.Console namespace is used for debugging and error logging.
* If the Firebug Lite (../Firebug/firebug.js) is included before this script,
* calls to OpenLayers.Console methods will get redirected to window.console.
* This makes use of the Firebug extension where available and allows for
* cross-browser debugging Firebug style.
*
* Note:
* Note that behavior will differ with the Firebug extention and Firebug Lite.
* Most notably, the Firebug Lite console does not currently allow for
* hyperlinks to code or for clicking on object to explore their properties.
*
*/
OpenLayers.Console = {
/**
* Create empty functions for all console methods. The real value of these
* properties will be set if Firebug Lite (../Firebug/firebug.js script) is
* included. We explicitly require the Firebug Lite script to trigger
* functionality of the OpenLayers.Console methods.
*/
/**
* APIFunction: log
* Log an object in the console. The Firebug Lite console logs string
* representation of objects. Given multiple arguments, they will
* be cast to strings and logged with a space delimiter. If the first
* argument is a string with printf-like formatting, subsequent arguments
* will be used in string substitution. Any additional arguments (beyond
* the number substituted in a format string) will be appended in a space-
* delimited line.
*
* Parameters:
* object - {Object}
*/
log: function() {},
/**
* APIFunction: debug
* Writes a message to the console, including a hyperlink to the line
* where it was called.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
debug: function() {},
/**
* APIFunction: info
* Writes a message to the console with the visual "info" icon and color
* coding and a hyperlink to the line where it was called.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
info: function() {},
/**
* APIFunction: warn
* Writes a message to the console with the visual "warning" icon and
* color coding and a hyperlink to the line where it was called.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
warn: function() {},
/**
* APIFunction: error
* Writes a message to the console with the visual "error" icon and color
* coding and a hyperlink to the line where it was called.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
error: function() {},
/**
* APIFunction: userError
* A single interface for showing error messages to the user. The default
* behavior is a Javascript alert, though this can be overridden by
* reassigning OpenLayers.Console.userError to a different function.
*
* Expects a single error message
*
* Parameters:
* error - {Object}
*/
userError: function(error) {
alert(error);
},
/**
* APIFunction: assert
* Tests that an expression is true. If not, it will write a message to
* the console and throw an exception.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
assert: function() {},
/**
* APIFunction: dir
* Prints an interactive listing of all properties of the object. This
* looks identical to the view that you would see in the DOM tab.
*
* Parameters:
* object - {Object}
*/
dir: function() {},
/**
* APIFunction: dirxml
* Prints the XML source tree of an HTML or XML element. This looks
* identical to the view that you would see in the HTML tab. You can click
* on any node to inspect it in the HTML tab.
*
* Parameters:
* object - {Object}
*/
dirxml: function() {},
/**
* APIFunction: trace
* Prints an interactive stack trace of JavaScript execution at the point
* where it is called. The stack trace details the functions on the stack,
* as well as the values that were passed as arguments to each function.
* You can click each function to take you to its source in the Script tab,
* and click each argument value to inspect it in the DOM or HTML tabs.
*
*/
trace: function() {},
/**
* APIFunction: group
* Writes a message to the console and opens a nested block to indent all
* future messages sent to the console. Call OpenLayers.Console.groupEnd()
* to close the block.
*
* May be called with multiple arguments as with OpenLayers.Console.log().
*
* Parameters:
* object - {Object}
*/
group: function() {},
/**
* APIFunction: groupEnd
* Closes the most recently opened block created by a call to
* OpenLayers.Console.group
*/
groupEnd: function() {},
/**
* APIFunction: time
* Creates a new timer under the given name. Call
* OpenLayers.Console.timeEnd(name)
* with the same name to stop the timer and print the time elapsed.
*
* Parameters:
* name - {String}
*/
time: function() {},
/**
* APIFunction: timeEnd
* Stops a timer created by a call to OpenLayers.Console.time(name) and
* writes the time elapsed.
*
* Parameters:
* name - {String}
*/
timeEnd: function() {},
/**
* APIFunction: profile
* Turns on the JavaScript profiler. The optional argument title would
* contain the text to be printed in the header of the profile report.
*
* This function is not currently implemented in Firebug Lite.
*
* Parameters:
* title - {String} Optional title for the profiler
*/
profile: function() {},
/**
* APIFunction: profileEnd
* Turns off the JavaScript profiler and prints its report.
*
* This function is not currently implemented in Firebug Lite.
*/
profileEnd: function() {},
/**
* APIFunction: count
* Writes the number of times that the line of code where count was called
* was executed. The optional argument title will print a message in
* addition to the number of the count.
*
* This function is not currently implemented in Firebug Lite.
*
* Parameters:
* title - {String} Optional title to be printed with count
*/
count: function() {},
CLASS_NAME: "OpenLayers.Console"
};
/**
* Execute an anonymous function to extend the OpenLayers.Console namespace
* if the firebug.js script is included. This closure is used so that the
* "scripts" and "i" variables don't pollute the global namespace.
*/
(function() {
/**
* If Firebug Lite is included (before this script), re-route all
* OpenLayers.Console calls to the console object.
*/
var scripts = document.getElementsByTagName("script");
for(var i=0, len=scripts.length; i<len; ++i) {
if(scripts[i].src.indexOf("firebug.js") != -1) {
if(console) {
OpenLayers.Util.extend(OpenLayers.Console, console);
break;
}
}
}
})();
/* ======================================================================
OpenLayers/Lang.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes.js
* @requires OpenLayers/Console.js
*/
/**
* Namespace: OpenLayers.Lang
* Internationalization namespace. Contains dictionaries in various languages
* and methods to set and get the current language.
*/
OpenLayers.Lang = {
/**
* Property: code
* {String} Current language code to use in OpenLayers. Use the
* <setCode> method to set this value and the <getCode> method to
* retrieve it.
*/
code: null,
/**
* APIProperty: defaultCode
* {String} Default language to use when a specific language can't be
* found. Default is "en".
*/
defaultCode: "en",
/**
* APIFunction: getCode
* Get the current language code.
*
* Returns:
* {String} The current language code.
*/
getCode: function() {
if(!OpenLayers.Lang.code) {
OpenLayers.Lang.setCode();
}
return OpenLayers.Lang.code;
},
/**
* APIFunction: setCode
* Set the language code for string translation. This code is used by
* the <OpenLayers.Lang.translate> method.
*
* Parameters:
* code - {String} These codes follow the IETF recommendations at
* http://www.ietf.org/rfc/rfc3066.txt. If no value is set, the
* browser's language setting will be tested. If no <OpenLayers.Lang>
* dictionary exists for the code, the <OpenLayers.String.defaultLang>
* will be used.
*/
setCode: function(code) {
var lang;
if(!code) {
code = (OpenLayers.BROWSER_NAME == "msie") ?
navigator.userLanguage : navigator.language;
}
var parts = code.split('-');
parts[0] = parts[0].toLowerCase();
if(typeof OpenLayers.Lang[parts[0]] == "object") {
lang = parts[0];
}
// check for regional extensions
if(parts[1]) {
var testLang = parts[0] + '-' + parts[1].toUpperCase();
if(typeof OpenLayers.Lang[testLang] == "object") {
lang = testLang;
}
}
if(!lang) {
OpenLayers.Console.warn(
'Failed to find OpenLayers.Lang.' + parts.join("-") +
' dictionary, falling back to default language'
);
lang = OpenLayers.Lang.defaultCode;
}
OpenLayers.Lang.code = lang;
},
/**
* APIMethod: translate
* Looks up a key from a dictionary based on the current language string.
* The value of <getCode> will be used to determine the appropriate
* dictionary. Dictionaries are stored in <OpenLayers.Lang>.
*
* Parameters:
* key - {String} The key for an i18n string value in the dictionary.
* context - {Object} Optional context to be used with
* <OpenLayers.String.format>.
*
* Returns:
* {String} A internationalized string.
*/
translate: function(key, context) {
var dictionary = OpenLayers.Lang[OpenLayers.Lang.getCode()];
var message = dictionary && dictionary[key];
if(!message) {
// Message not found, fall back to message key
message = key;
}
if(context) {
message = OpenLayers.String.format(message, context);
}
return message;
}
};
/**
* APIMethod: OpenLayers.i18n
* Alias for <OpenLayers.Lang.translate>. Looks up a key from a dictionary
* based on the current language string. The value of
* <OpenLayers.Lang.getCode> will be used to determine the appropriate
* dictionary. Dictionaries are stored in <OpenLayers.Lang>.
*
* Parameters:
* key - {String} The key for an i18n string value in the dictionary.
* context - {Object} Optional context to be used with
* <OpenLayers.String.format>.
*
* Returns:
* {String} A internationalized string.
*/
OpenLayers.i18n = OpenLayers.Lang.translate;
/* ======================================================================
OpenLayers/Util.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes.js
* @requires OpenLayers/BaseTypes/Bounds.js
* @requires OpenLayers/BaseTypes/Element.js
* @requires OpenLayers/BaseTypes/LonLat.js
* @requires OpenLayers/BaseTypes/Pixel.js
* @requires OpenLayers/BaseTypes/Size.js
* @requires OpenLayers/Lang.js
*/
/**
* Namespace: Util
*/
OpenLayers.Util = OpenLayers.Util || {};
/**
* Function: getElement
* This is the old $() from prototype
*
* Parameters:
* e - {String or DOMElement or Window}
*
* Returns:
* {Array(DOMElement) or DOMElement}
*/
OpenLayers.Util.getElement = function() {
var elements = [];
for (var i=0, len=arguments.length; i<len; i++) {
var element = arguments[i];
if (typeof element == 'string') {
element = document.getElementById(element);
}
if (arguments.length == 1) {
return element;
}
elements.push(element);
}
return elements;
};
/**
* Function: isElement
* A cross-browser implementation of "e instanceof Element".
*
* Parameters:
* o - {Object} The object to test.
*
* Returns:
* {Boolean}
*/
OpenLayers.Util.isElement = function(o) {
return !!(o && o.nodeType === 1);
};
/**
* Function: isArray
* Tests that the provided object is an array.
* This test handles the cross-IFRAME case not caught
* by "a instanceof Array" and should be used instead.
*
* Parameters:
* a - {Object} the object test.
*
* Returns:
* {Boolean} true if the object is an array.
*/
OpenLayers.Util.isArray = function(a) {
return (Object.prototype.toString.call(a) === '[object Array]');
};
/**
* Function: removeItem
* Remove an object from an array. Iterates through the array
* to find the item, then removes it.
*
* Parameters:
* array - {Array}
* item - {Object}
*
* Returns:
* {Array} A reference to the array
*/
OpenLayers.Util.removeItem = function(array, item) {
for(var i = array.length - 1; i >= 0; i--) {
if(array[i] == item) {
array.splice(i,1);
//break;more than once??
}
}
return array;
};
/**
* Function: indexOf
* Seems to exist already in FF, but not in MOZ.
*
* Parameters:
* array - {Array}
* obj - {*}
*
* Returns:
* {Integer} The index at which the first object was found in the array.
* If not found, returns -1.
*/
OpenLayers.Util.indexOf = function(array, obj) {
// use the build-in function if available.
if (typeof array.indexOf == "function") {
return array.indexOf(obj);
} else {
for (var i = 0, len = array.length; i < len; i++) {
if (array[i] == obj) {
return i;
}
}
return -1;
}
};
/**
* Property: dotless
* {RegExp}
* Compiled regular expression to match dots ("."). This is used for replacing
* dots in identifiers. Because object identifiers are frequently used for
* DOM element identifiers by the library, we avoid using dots to make for
* more sensible CSS selectors.
*
* TODO: Use a module pattern to avoid bloating the API with stuff like this.
*/
OpenLayers.Util.dotless = /\./g;
/**
* Function: modifyDOMElement
*
* Modifies many properties of a DOM element all at once. Passing in
* null to an individual parameter will avoid setting the attribute.
*
* Parameters:
* element - {DOMElement} DOM element to modify.
* id - {String} The element id attribute to set. Note that dots (".") will be
* replaced with underscore ("_") in setting the element id.
* px - {<OpenLayers.Pixel>|Object} The element left and top position,
* OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
* sz - {<OpenLayers.Size>|Object} The element width and height,
* OpenLayers.Size or an object with a
* 'w' and 'h' properties.
* position - {String} The position attribute. eg: absolute,
* relative, etc.
* border - {String} The style.border attribute. eg:
* solid black 2px
* overflow - {String} The style.overview attribute.
* opacity - {Float} Fractional value (0.0 - 1.0)
*/
OpenLayers.Util.modifyDOMElement = function(element, id, px, sz, position,
border, overflow, opacity) {
if (id) {
element.id = id.replace(OpenLayers.Util.dotless, "_");
}
if (px) {
element.style.left = px.x + "px";
element.style.top = px.y + "px";
}
if (sz) {
element.style.width = sz.w + "px";
element.style.height = sz.h + "px";
}
if (position) {
element.style.position = position;
}
if (border) {
element.style.border = border;
}
if (overflow) {
element.style.overflow = overflow;
}
if (parseFloat(opacity) >= 0.0 && parseFloat(opacity) < 1.0) {
element.style.filter = 'alpha(opacity=' + (opacity * 100) + ')';
element.style.opacity = opacity;
} else if (parseFloat(opacity) == 1.0) {
element.style.filter = '';
element.style.opacity = '';
}
};
/**
* Function: createDiv
* Creates a new div and optionally set some standard attributes.
* Null may be passed to each parameter if you do not wish to
* set a particular attribute.
* Note - zIndex is NOT set on the resulting div.
*
* Parameters:
* id - {String} An identifier for this element. If no id is
* passed an identifier will be created
* automatically. Note that dots (".") will be replaced with
* underscore ("_") when generating ids.
* px - {<OpenLayers.Pixel>|Object} The element left and top position,
* OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
* sz - {<OpenLayers.Size>|Object} The element width and height,
* OpenLayers.Size or an object with a
* 'w' and 'h' properties.
* imgURL - {String} A url pointing to an image to use as a
* background image.
* position - {String} The style.position value. eg: absolute,
* relative etc.
* border - {String} The the style.border value.
* eg: 2px solid black
* overflow - {String} The style.overflow value. Eg. hidden
* opacity - {Float} Fractional value (0.0 - 1.0)
*
* Returns:
* {DOMElement} A DOM Div created with the specified attributes.
*/
OpenLayers.Util.createDiv = function(id, px, sz, imgURL, position,
border, overflow, opacity) {
var dom = document.createElement('div');
if (imgURL) {
dom.style.backgroundImage = 'url(' + imgURL + ')';
}
//set generic properties
if (!id) {
id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
}
if (!position) {
position = "absolute";
}
OpenLayers.Util.modifyDOMElement(dom, id, px, sz, position,
border, overflow, opacity);
return dom;
};
/**
* Function: createImage
* Creates an img element with specific attribute values.
*
* Parameters:
* id - {String} The id field for the img. If none assigned one will be
* automatically generated.
* px - {<OpenLayers.Pixel>|Object} The element left and top position,
* OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
* sz - {<OpenLayers.Size>|Object} The element width and height,
* OpenLayers.Size or an object with a
* 'w' and 'h' properties.
* imgURL - {String} The url to use as the image source.
* position - {String} The style.position value.
* border - {String} The border to place around the image.
* opacity - {Float} Fractional value (0.0 - 1.0)
* delayDisplay - {Boolean} If true waits until the image has been
* loaded.
*
* Returns:
* {DOMElement} A DOM Image created with the specified attributes.
*/
OpenLayers.Util.createImage = function(id, px, sz, imgURL, position, border,
opacity, delayDisplay) {
var image = document.createElement("img");
//set generic properties
if (!id) {
id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
}
if (!position) {
position = "relative";
}
OpenLayers.Util.modifyDOMElement(image, id, px, sz, position,
border, null, opacity);
if (delayDisplay) {
image.style.display = "none";
function display() {
image.style.display = "";
OpenLayers.Event.stopObservingElement(image);
}
OpenLayers.Event.observe(image, "load", display);
OpenLayers.Event.observe(image, "error", display);
}
//set special properties
image.style.alt = id;
image.galleryImg = "no";
if (imgURL) {
image.src = imgURL;
}
return image;
};
/**
* Property: IMAGE_RELOAD_ATTEMPTS
* {Integer} How many times should we try to reload an image before giving up?
* Default is 0
*/
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 0;
/**
* Property: alphaHackNeeded
* {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
*/
OpenLayers.Util.alphaHackNeeded = null;
/**
* Function: alphaHack
* Checks whether it's necessary (and possible) to use the png alpha
* hack which allows alpha transparency for png images under Internet
* Explorer.
*
* Returns:
* {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
*/
OpenLayers.Util.alphaHack = function() {
if (OpenLayers.Util.alphaHackNeeded == null) {
var arVersion = navigator.appVersion.split("MSIE");
var version = parseFloat(arVersion[1]);
var filter = false;
// IEs4Lin dies when trying to access document.body.filters, because
// the property is there, but requires a DLL that can't be provided. This
// means that we need to wrap this in a try/catch so that this can
// continue.
try {
filter = !!(document.body.filters);
} catch (e) {}
OpenLayers.Util.alphaHackNeeded = (filter &&
(version >= 5.5) && (version < 7));
}
return OpenLayers.Util.alphaHackNeeded;
};
/**
* Function: modifyAlphaImageDiv
*
* Parameters:
* div - {DOMElement} Div containing Alpha-adjusted Image
* id - {String}
* px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
* sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
* a 'w' and 'h' properties.
* imgURL - {String}
* position - {String}
* border - {String}
* sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
* opacity - {Float} Fractional value (0.0 - 1.0)
*/
OpenLayers.Util.modifyAlphaImageDiv = function(div, id, px, sz, imgURL,
position, border, sizing,
opacity) {
OpenLayers.Util.modifyDOMElement(div, id, px, sz, position,
null, null, opacity);
var img = div.childNodes[0];
if (imgURL) {
img.src = imgURL;
}
OpenLayers.Util.modifyDOMElement(img, div.id + "_innerImage", null, sz,
"relative", border);
if (OpenLayers.Util.alphaHack()) {
if(div.style.display != "none") {
div.style.display = "inline-block";
}
if (sizing == null) {
sizing = "scale";
}
div.style.filter = "progid:DXImageTransform.Microsoft" +
".AlphaImageLoader(src='" + img.src + "', " +
"sizingMethod='" + sizing + "')";
if (parseFloat(div.style.opacity) >= 0.0 &&
parseFloat(div.style.opacity) < 1.0) {
div.style.filter += " alpha(opacity=" + div.style.opacity * 100 + ")";
}
img.style.filter = "alpha(opacity=0)";
}
};
/**
* Function: createAlphaImageDiv
*
* Parameters:
* id - {String}
* px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
* sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
* a 'w' and 'h' properties.
* imgURL - {String}
* position - {String}
* border - {String}
* sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
* opacity - {Float} Fractional value (0.0 - 1.0)
* delayDisplay - {Boolean} If true waits until the image has been
* loaded.
*
* Returns:
* {DOMElement} A DOM Div created with a DOM Image inside it. If the hack is
* needed for transparency in IE, it is added.
*/
OpenLayers.Util.createAlphaImageDiv = function(id, px, sz, imgURL,
position, border, sizing,
opacity, delayDisplay) {
var div = OpenLayers.Util.createDiv();
var img = OpenLayers.Util.createImage(null, null, null, null, null, null,
null, delayDisplay);
img.className = "olAlphaImg";
div.appendChild(img);
OpenLayers.Util.modifyAlphaImageDiv(div, id, px, sz, imgURL, position,
border, sizing, opacity);
return div;
};
/**
* Function: upperCaseObject
* Creates a new hashtable and copies over all the keys from the
* passed-in object, but storing them under an uppercased
* version of the key at which they were stored.
*
* Parameters:
* object - {Object}
*
* Returns:
* {Object} A new Object with all the same keys but uppercased
*/
OpenLayers.Util.upperCaseObject = function (object) {
var uObject = {};
for (var key in object) {
uObject[key.toUpperCase()] = object[key];
}
return uObject;
};
/**
* Function: applyDefaults
* Takes an object and copies any properties that don't exist from
* another properties, by analogy with OpenLayers.Util.extend() from
* Prototype.js.
*
* Parameters:
* to - {Object} The destination object.
* from - {Object} The source object. Any properties of this object that
* are undefined in the to object will be set on the to object.
*
* Returns:
* {Object} A reference to the to object. Note that the to argument is modified
* in place and returned by this function.
*/
OpenLayers.Util.applyDefaults = function (to, from) {
to = to || {};
/*
* FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
* prototype object" when calling hawOwnProperty if the source object is an
* instance of window.Event.
*/
var fromIsEvt = typeof window.Event == "function"
&& from instanceof window.Event;
for (var key in from) {
if (to[key] === undefined ||
(!fromIsEvt && from.hasOwnProperty
&& from.hasOwnProperty(key) && !to.hasOwnProperty(key))) {
to[key] = from[key];
}
}
/**
* IE doesn't include the toString property when iterating over an object's
* properties with the for(property in object) syntax. Explicitly check if
* the source has its own toString property.
*/
if(!fromIsEvt && from && from.hasOwnProperty
&& from.hasOwnProperty('toString') && !to.hasOwnProperty('toString')) {
to.toString = from.toString;
}
return to;
};
/**
* Function: getParameterString
*
* Parameters:
* params - {Object}
*
* Returns:
* {String} A concatenation of the properties of an object in
* http parameter notation.
* (ex. <i>"key1=value1&key2=value2&key3=value3"</i>)
* If a parameter is actually a list, that parameter will then
* be set to a comma-seperated list of values (foo,bar) instead
* of being URL escaped (foo%3Abar).
*/
OpenLayers.Util.getParameterString = function(params) {
var paramsArray = [];
for (var key in params) {
var value = params[key];
if ((value != null) && (typeof value != 'function')) {
var encodedValue;
if (typeof value == 'object' && value.constructor == Array) {
/* value is an array; encode items and separate with "," */
var encodedItemArray = [];
var item;
for (var itemIndex=0, len=value.length; itemIndex<len; itemIndex++) {
item = value[itemIndex];
encodedItemArray.push(encodeURIComponent(
(item === null || item === undefined) ? "" : item)
);
}
encodedValue = encodedItemArray.join(",");
}
else {
/* value is a string; simply encode */
encodedValue = encodeURIComponent(value);
}
paramsArray.push(encodeURIComponent(key) + "=" + encodedValue);
}
}
return paramsArray.join("&");
};
/**
* Function: urlAppend
* Appends a parameter string to a url. This function includes the logic for
* using the appropriate character (none, & or ?) to append to the url before
* appending the param string.
*
* Parameters:
* url - {String} The url to append to
* paramStr - {String} The param string to append
*
* Returns:
* {String} The new url
*/
OpenLayers.Util.urlAppend = function(url, paramStr) {
var newUrl = url;
if(paramStr) {
var parts = (url + " ").split(/[?&]/);
newUrl += (parts.pop() === " " ?
paramStr :
parts.length ? "&" + paramStr : "?" + paramStr);
}
return newUrl;
};
/**
* Function: getImagesLocation
*
* Returns:
* {String} The fully formatted image location string
*/
OpenLayers.Util.getImagesLocation = function() {
return OpenLayers.ImgPath || (OpenLayers._getScriptLocation() + "img/");
};
/**
* Function: getImageLocation
*
* Returns:
* {String} The fully formatted location string for a specified image
*/
OpenLayers.Util.getImageLocation = function(image) {
return OpenLayers.Util.getImagesLocation() + image;
};
/**
* Function: Try
* Execute functions until one of them doesn't throw an error.
* Capitalized because "try" is a reserved word in JavaScript.
* Taken directly from OpenLayers.Util.Try()
*
* Parameters:
* [*] - {Function} Any number of parameters may be passed to Try()
* It will attempt to execute each of them until one of them
* successfully executes.
* If none executes successfully, returns null.
*
* Returns:
* {*} The value returned by the first successfully executed function.
*/
OpenLayers.Util.Try = function() {
var returnValue = null;
for (var i=0, len=arguments.length; i<len; i++) {
var lambda = arguments[i];
try {
returnValue = lambda();
break;
} catch (e) {}
}
return returnValue;
};
/**
* Function: getXmlNodeValue
*
* Parameters:
* node - {XMLNode}
*
* Returns:
* {String} The text value of the given node, without breaking in firefox or IE
*/
OpenLayers.Util.getXmlNodeValue = function(node) {
var val = null;
OpenLayers.Util.Try(
function() {
val = node.text;
if (!val) {
val = node.textContent;
}
if (!val) {
val = node.firstChild.nodeValue;
}
},
function() {
val = node.textContent;
});
return val;
};
/**
* Function: mouseLeft
*
* Parameters:
* evt - {Event}
* div - {HTMLDivElement}
*
* Returns:
* {Boolean}
*/
OpenLayers.Util.mouseLeft = function (evt, div) {
// start with the element to which the mouse has moved
var target = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement;
// walk up the DOM tree.
while (target != div && target != null) {
target = target.parentNode;
}
// if the target we stop at isn't the div, then we've left the div.
return (target != div);
};
/**
* Property: precision
* {Number} The number of significant digits to retain to avoid
* floating point precision errors.
*
* We use 14 as a "safe" default because, although IEEE 754 double floats
* (standard on most modern operating systems) support up to about 16
* significant digits, 14 significant digits are sufficient to represent
* sub-millimeter accuracy in any coordinate system that anyone is likely to
* use with OpenLayers.
*
* If DEFAULT_PRECISION is set to 0, the original non-truncating behavior
* of OpenLayers <2.8 is preserved. Be aware that this will cause problems
* with certain projections, e.g. spherical Mercator.
*
*/
OpenLayers.Util.DEFAULT_PRECISION = 14;
/**
* Function: toFloat
* Convenience method to cast an object to a Number, rounded to the
* desired floating point precision.
*
* Parameters:
* number - {Number} The number to cast and round.
* precision - {Number} An integer suitable for use with
* Number.toPrecision(). Defaults to OpenLayers.Util.DEFAULT_PRECISION.
* If set to 0, no rounding is performed.
*
* Returns:
* {Number} The cast, rounded number.
*/
OpenLayers.Util.toFloat = function (number, precision) {
if (precision == null) {
precision = OpenLayers.Util.DEFAULT_PRECISION;
}
if (typeof number !== "number") {
number = parseFloat(number);
}
return precision === 0 ? number :
parseFloat(number.toPrecision(precision));
};
/**
* Function: rad
*
* Parameters:
* x - {Float}
*
* Returns:
* {Float}
*/
OpenLayers.Util.rad = function(x) {return x*Math.PI/180;};
/**
* Function: deg
*
* Parameters:
* x - {Float}
*
* Returns:
* {Float}
*/
OpenLayers.Util.deg = function(x) {return x*180/Math.PI;};
/**
* Property: VincentyConstants
* {Object} Constants for Vincenty functions.
*/
OpenLayers.Util.VincentyConstants = {
a: 6378137,
b: 6356752.3142,
f: 1/298.257223563
};
/**
* APIFunction: distVincenty
* Given two objects representing points with geographic coordinates, this
* calculates the distance between those points on the surface of an
* ellipsoid.
*
* Parameters:
* p1 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
* p2 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
*
* Returns:
* {Float} The distance (in km) between the two input points as measured on an
* ellipsoid. Note that the input point objects must be in geographic
* coordinates (decimal degrees) and the return distance is in kilometers.
*/
OpenLayers.Util.distVincenty = function(p1, p2) {
var ct = OpenLayers.Util.VincentyConstants;
var a = ct.a, b = ct.b, f = ct.f;
var L = OpenLayers.Util.rad(p2.lon - p1.lon);
var U1 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p1.lat)));
var U2 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p2.lat)));
var sinU1 = Math.sin(U1), cosU1 = Math.cos(U1);
var sinU2 = Math.sin(U2), cosU2 = Math.cos(U2);
var lambda = L, lambdaP = 2*Math.PI;
var iterLimit = 20;
while (Math.abs(lambda-lambdaP) > 1e-12 && --iterLimit>0) {
var sinLambda = Math.sin(lambda), cosLambda = Math.cos(lambda);
var sinSigma = Math.sqrt((cosU2*sinLambda) * (cosU2*sinLambda) +
(cosU1*sinU2-sinU1*cosU2*cosLambda) * (cosU1*sinU2-sinU1*cosU2*cosLambda));
if (sinSigma==0) {
return 0; // co-incident points
}
var cosSigma = sinU1*sinU2 + cosU1*cosU2*cosLambda;
var sigma = Math.atan2(sinSigma, cosSigma);
var alpha = Math.asin(cosU1 * cosU2 * sinLambda / sinSigma);
var cosSqAlpha = Math.cos(alpha) * Math.cos(alpha);
var cos2SigmaM = cosSigma - 2*sinU1*sinU2/cosSqAlpha;
var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
lambdaP = lambda;
lambda = L + (1-C) * f * Math.sin(alpha) *
(sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
}
if (iterLimit==0) {
return NaN; // formula failed to converge
}
var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
var s = b*A*(sigma-deltaSigma);
var d = s.toFixed(3)/1000; // round to 1mm precision
return d;
};
/**
* APIFunction: destinationVincenty
* Calculate destination point given start point lat/long (numeric degrees),
* bearing (numeric degrees) & distance (in m).
* Adapted from Chris Veness work, see
* http://www.movable-type.co.uk/scripts/latlong-vincenty-direct.html
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>} (or any object with both .lat, .lon
* properties) The start point.
* brng - {Float} The bearing (degrees).
* dist - {Float} The ground distance (meters).
*
* Returns:
* {<OpenLayers.LonLat>} The destination point.
*/
OpenLayers.Util.destinationVincenty = function(lonlat, brng, dist) {
var u = OpenLayers.Util;
var ct = u.VincentyConstants;
var a = ct.a, b = ct.b, f = ct.f;
var lon1 = lonlat.lon;
var lat1 = lonlat.lat;
var s = dist;
var alpha1 = u.rad(brng);
var sinAlpha1 = Math.sin(alpha1);
var cosAlpha1 = Math.cos(alpha1);
var tanU1 = (1-f) * Math.tan(u.rad(lat1));
var cosU1 = 1 / Math.sqrt((1 + tanU1*tanU1)), sinU1 = tanU1*cosU1;
var sigma1 = Math.atan2(tanU1, cosAlpha1);
var sinAlpha = cosU1 * sinAlpha1;
var cosSqAlpha = 1 - sinAlpha*sinAlpha;
var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
var sigma = s / (b*A), sigmaP = 2*Math.PI;
while (Math.abs(sigma-sigmaP) > 1e-12) {
var cos2SigmaM = Math.cos(2*sigma1 + sigma);
var sinSigma = Math.sin(sigma);
var cosSigma = Math.cos(sigma);
var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
sigmaP = sigma;
sigma = s / (b*A) + deltaSigma;
}
var tmp = sinU1*sinSigma - cosU1*cosSigma*cosAlpha1;
var lat2 = Math.atan2(sinU1*cosSigma + cosU1*sinSigma*cosAlpha1,
(1-f)*Math.sqrt(sinAlpha*sinAlpha + tmp*tmp));
var lambda = Math.atan2(sinSigma*sinAlpha1, cosU1*cosSigma - sinU1*sinSigma*cosAlpha1);
var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
var L = lambda - (1-C) * f * sinAlpha *
(sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
var revAz = Math.atan2(sinAlpha, -tmp); // final bearing
return new OpenLayers.LonLat(lon1+u.deg(L), u.deg(lat2));
};
/**
* Function: getParameters
* Parse the parameters from a URL or from the current page itself into a
* JavaScript Object. Note that parameter values with commas are separated
* out into an Array.
*
* Parameters:
* url - {String} Optional url used to extract the query string.
* If url is null or is not supplied, query string is taken
* from the page location.
* options - {Object} Additional options. Optional.
*
* Valid options:
* splitArgs - {Boolean} Split comma delimited params into arrays? Default is
* true.
*
* Returns:
* {Object} An object of key/value pairs from the query string.
*/
OpenLayers.Util.getParameters = function(url, options) {
options = options || {};
// if no url specified, take it from the location bar
url = (url === null || url === undefined) ? window.location.href : url;
//parse out parameters portion of url string
var paramsString = "";
if (OpenLayers.String.contains(url, '?')) {
var start = url.indexOf('?') + 1;
var end = OpenLayers.String.contains(url, "#") ?
url.indexOf('#') : url.length;
paramsString = url.substring(start, end);
}
var parameters = {};
var pairs = paramsString.split(/[&;]/);
for(var i=0, len=pairs.length; i<len; ++i) {
var keyValue = pairs[i].split('=');
if (keyValue[0]) {
var key = keyValue[0];
try {
key = decodeURIComponent(key);
} catch (err) {
key = unescape(key);
}
// being liberal by replacing "+" with " "
var value = (keyValue[1] || '').replace(/\+/g, " ");
try {
value = decodeURIComponent(value);
} catch (err) {
value = unescape(value);
}
// follow OGC convention of comma delimited values
if (options.splitArgs !== false) {
value = value.split(",");
}
//if there's only one value, do not return as array
if (value.length == 1) {
value = value[0];
}
parameters[key] = value;
}
}
return parameters;
};
/**
* Property: lastSeqID
* {Integer} The ever-incrementing count variable.
* Used for generating unique ids.
*/
OpenLayers.Util.lastSeqID = 0;
/**
* Function: createUniqueID
* Create a unique identifier for this session. Each time this function
* is called, a counter is incremented. The return will be the optional
* prefix (defaults to "id_") appended with the counter value.
*
* Parameters:
* prefix - {String} Optional string to prefix unique id. Default is "id_".
* Note that dots (".") in the prefix will be replaced with underscore ("_").
*
* Returns:
* {String} A unique id string, built on the passed in prefix.
*/
OpenLayers.Util.createUniqueID = function(prefix) {
if (prefix == null) {
prefix = "id_";
} else {
prefix = prefix.replace(OpenLayers.Util.dotless, "_");
}
OpenLayers.Util.lastSeqID += 1;
return prefix + OpenLayers.Util.lastSeqID;
};
/**
* Constant: INCHES_PER_UNIT
* {Object} Constant inches per unit -- borrowed from MapServer mapscale.c
* derivation of nautical miles from http://en.wikipedia.org/wiki/Nautical_mile
* Includes the full set of units supported by CS-MAP (http://trac.osgeo.org/csmap/)
* and PROJ.4 (http://trac.osgeo.org/proj/)
* The hardcoded table is maintain in a CS-MAP source code module named CSdataU.c
* The hardcoded table of PROJ.4 units are in pj_units.c.
*/
OpenLayers.INCHES_PER_UNIT = {
'inches': 1.0,
'ft': 12.0,
'mi': 63360.0,
'm': 39.37,
'km': 39370,
'dd': 4374754,
'yd': 36
};
OpenLayers.INCHES_PER_UNIT["in"]= OpenLayers.INCHES_PER_UNIT.inches;
OpenLayers.INCHES_PER_UNIT["degrees"] = OpenLayers.INCHES_PER_UNIT.dd;
OpenLayers.INCHES_PER_UNIT["nmi"] = 1852 * OpenLayers.INCHES_PER_UNIT.m;
// Units from CS-Map
OpenLayers.METERS_PER_INCH = 0.02540005080010160020;
OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
"Inch": OpenLayers.INCHES_PER_UNIT.inches,
"Meter": 1.0 / OpenLayers.METERS_PER_INCH, //EPSG:9001
"Foot": 0.30480060960121920243 / OpenLayers.METERS_PER_INCH, //EPSG:9003
"IFoot": 0.30480000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9002
"ClarkeFoot": 0.3047972651151 / OpenLayers.METERS_PER_INCH, //EPSG:9005
"SearsFoot": 0.30479947153867624624 / OpenLayers.METERS_PER_INCH, //EPSG:9041
"GoldCoastFoot": 0.30479971018150881758 / OpenLayers.METERS_PER_INCH, //EPSG:9094
"IInch": 0.02540000000000000000 / OpenLayers.METERS_PER_INCH,
"MicroInch": 0.00002540000000000000 / OpenLayers.METERS_PER_INCH,
"Mil": 0.00000002540000000000 / OpenLayers.METERS_PER_INCH,
"Centimeter": 0.01000000000000000000 / OpenLayers.METERS_PER_INCH,
"Kilometer": 1000.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9036
"Yard": 0.91440182880365760731 / OpenLayers.METERS_PER_INCH,
"SearsYard": 0.914398414616029 / OpenLayers.METERS_PER_INCH, //EPSG:9040
"IndianYard": 0.91439853074444079983 / OpenLayers.METERS_PER_INCH, //EPSG:9084
"IndianYd37": 0.91439523 / OpenLayers.METERS_PER_INCH, //EPSG:9085
"IndianYd62": 0.9143988 / OpenLayers.METERS_PER_INCH, //EPSG:9086
"IndianYd75": 0.9143985 / OpenLayers.METERS_PER_INCH, //EPSG:9087
"IndianFoot": 0.30479951 / OpenLayers.METERS_PER_INCH, //EPSG:9080
"IndianFt37": 0.30479841 / OpenLayers.METERS_PER_INCH, //EPSG:9081
"IndianFt62": 0.3047996 / OpenLayers.METERS_PER_INCH, //EPSG:9082
"IndianFt75": 0.3047995 / OpenLayers.METERS_PER_INCH, //EPSG:9083
"Mile": 1609.34721869443738887477 / OpenLayers.METERS_PER_INCH,
"IYard": 0.91440000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9096
"IMile": 1609.34400000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9093
"NautM": 1852.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9030
"Lat-66": 110943.316488932731 / OpenLayers.METERS_PER_INCH,
"Lat-83": 110946.25736872234125 / OpenLayers.METERS_PER_INCH,
"Decimeter": 0.10000000000000000000 / OpenLayers.METERS_PER_INCH,
"Millimeter": 0.00100000000000000000 / OpenLayers.METERS_PER_INCH,
"Dekameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
"Decameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
"Hectometer": 100.00000000000000000000 / OpenLayers.METERS_PER_INCH,
"GermanMeter": 1.0000135965 / OpenLayers.METERS_PER_INCH, //EPSG:9031
"CaGrid": 0.999738 / OpenLayers.METERS_PER_INCH,
"ClarkeChain": 20.1166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9038
"GunterChain": 20.11684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9033
"BenoitChain": 20.116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9062
"SearsChain": 20.11676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9042
"ClarkeLink": 0.201166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9039
"GunterLink": 0.2011684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9034
"BenoitLink": 0.20116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9063
"SearsLink": 0.2011676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9043
"Rod": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
"IntnlChain": 20.1168 / OpenLayers.METERS_PER_INCH, //EPSG:9097
"IntnlLink": 0.201168 / OpenLayers.METERS_PER_INCH, //EPSG:9098
"Perch": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
"Pole": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
"Furlong": 201.1684023368046 / OpenLayers.METERS_PER_INCH,
"Rood": 3.778266898 / OpenLayers.METERS_PER_INCH,
"CapeFoot": 0.3047972615 / OpenLayers.METERS_PER_INCH,
"Brealey": 375.00000000000000000000 / OpenLayers.METERS_PER_INCH,
"ModAmFt": 0.304812252984505969011938 / OpenLayers.METERS_PER_INCH,
"Fathom": 1.8288 / OpenLayers.METERS_PER_INCH,
"NautM-UK": 1853.184 / OpenLayers.METERS_PER_INCH,
"50kilometers": 50000.0 / OpenLayers.METERS_PER_INCH,
"150kilometers": 150000.0 / OpenLayers.METERS_PER_INCH
});
//unit abbreviations supported by PROJ.4
OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
"mm": OpenLayers.INCHES_PER_UNIT["Meter"] / 1000.0,
"cm": OpenLayers.INCHES_PER_UNIT["Meter"] / 100.0,
"dm": OpenLayers.INCHES_PER_UNIT["Meter"] * 100.0,
"km": OpenLayers.INCHES_PER_UNIT["Meter"] * 1000.0,
"kmi": OpenLayers.INCHES_PER_UNIT["nmi"], //International Nautical Mile
"fath": OpenLayers.INCHES_PER_UNIT["Fathom"], //International Fathom
"ch": OpenLayers.INCHES_PER_UNIT["IntnlChain"], //International Chain
"link": OpenLayers.INCHES_PER_UNIT["IntnlLink"], //International Link
"us-in": OpenLayers.INCHES_PER_UNIT["inches"], //U.S. Surveyor's Inch
"us-ft": OpenLayers.INCHES_PER_UNIT["Foot"], //U.S. Surveyor's Foot
"us-yd": OpenLayers.INCHES_PER_UNIT["Yard"], //U.S. Surveyor's Yard
"us-ch": OpenLayers.INCHES_PER_UNIT["GunterChain"], //U.S. Surveyor's Chain
"us-mi": OpenLayers.INCHES_PER_UNIT["Mile"], //U.S. Surveyor's Statute Mile
"ind-yd": OpenLayers.INCHES_PER_UNIT["IndianYd37"], //Indian Yard
"ind-ft": OpenLayers.INCHES_PER_UNIT["IndianFt37"], //Indian Foot
"ind-ch": 20.11669506 / OpenLayers.METERS_PER_INCH //Indian Chain
});
/**
* Constant: DOTS_PER_INCH
* {Integer} 72 (A sensible default)
*/
OpenLayers.DOTS_PER_INCH = 72;
/**
* Function: normalizeScale
*
* Parameters:
* scale - {float}
*
* Returns:
* {Float} A normalized scale value, in 1 / X format.
* This means that if a value less than one ( already 1/x) is passed
* in, it just returns scale directly. Otherwise, it returns
* 1 / scale
*/
OpenLayers.Util.normalizeScale = function (scale) {
var normScale = (scale > 1.0) ? (1.0 / scale)
: scale;
return normScale;
};
/**
* Function: getResolutionFromScale
*
* Parameters:
* scale - {Float}
* units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
* Default is degrees
*
* Returns:
* {Float} The corresponding resolution given passed-in scale and unit
* parameters. If the given scale is falsey, the returned resolution will
* be undefined.
*/
OpenLayers.Util.getResolutionFromScale = function (scale, units) {
var resolution;
if (scale) {
if (units == null) {
units = "degrees";
}
var normScale = OpenLayers.Util.normalizeScale(scale);
resolution = 1 / (normScale * OpenLayers.INCHES_PER_UNIT[units]
* OpenLayers.DOTS_PER_INCH);
}
return resolution;
};
/**
* Function: getScaleFromResolution
*
* Parameters:
* resolution - {Float}
* units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
* Default is degrees
*
* Returns:
* {Float} The corresponding scale given passed-in resolution and unit
* parameters.
*/
OpenLayers.Util.getScaleFromResolution = function (resolution, units) {
if (units == null) {
units = "degrees";
}
var scale = resolution * OpenLayers.INCHES_PER_UNIT[units] *
OpenLayers.DOTS_PER_INCH;
return scale;
};
/**
* Function: pagePosition
* Calculates the position of an element on the page (see
* http://code.google.com/p/doctype/wiki/ArticlePageOffset)
*
* OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
* Copyright (c) 2006, Yahoo! Inc.
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms, with or
* without modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Yahoo! Inc. nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission of Yahoo! Inc.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Parameters:
* forElement - {DOMElement}
*
* Returns:
* {Array} two item array, Left value then Top value.
*/
OpenLayers.Util.pagePosition = function(forElement) {
// NOTE: If element is hidden (display none or disconnected or any the
// ancestors are hidden) we get (0,0) by default but we still do the
// accumulation of scroll position.
var pos = [0, 0];
var viewportElement = OpenLayers.Util.getViewportElement();
if (!forElement || forElement == window || forElement == viewportElement) {
// viewport is always at 0,0 as that defined the coordinate system for
// this function - this avoids special case checks in the code below
return pos;
}
// Gecko browsers normally use getBoxObjectFor to calculate the position.
// When invoked for an element with an implicit absolute position though it
// can be off by one. Therefore the recursive implementation is used in
// those (relatively rare) cases.
var BUGGY_GECKO_BOX_OBJECT =
OpenLayers.IS_GECKO && document.getBoxObjectFor &&
OpenLayers.Element.getStyle(forElement, 'position') == 'absolute' &&
(forElement.style.top == '' || forElement.style.left == '');
var parent = null;
var box;
if (forElement.getBoundingClientRect) { // IE
box = forElement.getBoundingClientRect();
var scrollTop = window.pageYOffset || viewportElement.scrollTop;
var scrollLeft = window.pageXOffset || viewportElement.scrollLeft;
pos[0] = box.left + scrollLeft;
pos[1] = box.top + scrollTop;
} else if (document.getBoxObjectFor && !BUGGY_GECKO_BOX_OBJECT) { // gecko
// Gecko ignores the scroll values for ancestors, up to 1.9. See:
// https://bugzilla.mozilla.org/show_bug.cgi?id=328881 and
// https://bugzilla.mozilla.org/show_bug.cgi?id=330619
box = document.getBoxObjectFor(forElement);
var vpBox = document.getBoxObjectFor(viewportElement);
pos[0] = box.screenX - vpBox.screenX;
pos[1] = box.screenY - vpBox.screenY;
} else { // safari/opera
pos[0] = forElement.offsetLeft;
pos[1] = forElement.offsetTop;
parent = forElement.offsetParent;
if (parent != forElement) {
while (parent) {
pos[0] += parent.offsetLeft;
pos[1] += parent.offsetTop;
parent = parent.offsetParent;
}
}
var browser = OpenLayers.BROWSER_NAME;
// opera & (safari absolute) incorrectly account for body offsetTop
if (browser == "opera" || (browser == "safari" &&
OpenLayers.Element.getStyle(forElement, 'position') == 'absolute')) {
pos[1] -= document.body.offsetTop;
}
// accumulate the scroll positions for everything but the body element
parent = forElement.offsetParent;
while (parent && parent != document.body) {
pos[0] -= parent.scrollLeft;
// see https://bugs.opera.com/show_bug.cgi?id=249965
if (browser != "opera" || parent.tagName != 'TR') {
pos[1] -= parent.scrollTop;
}
parent = parent.offsetParent;
}
}
return pos;
};
/**
* Function: getViewportElement
* Returns die viewport element of the document. The viewport element is
* usually document.documentElement, except in IE,where it is either
* document.body or document.documentElement, depending on the document's
* compatibility mode (see
* http://code.google.com/p/doctype/wiki/ArticleClientViewportElement)
*
* Returns:
* {DOMElement}
*/
OpenLayers.Util.getViewportElement = function() {
var viewportElement = arguments.callee.viewportElement;
if (viewportElement == undefined) {
viewportElement = (OpenLayers.BROWSER_NAME == "msie" &&
document.compatMode != 'CSS1Compat') ? document.body :
document.documentElement;
arguments.callee.viewportElement = viewportElement;
}
return viewportElement;
};
/**
* Function: isEquivalentUrl
* Test two URLs for equivalence.
*
* Setting 'ignoreCase' allows for case-independent comparison.
*
* Comparison is based on:
* - Protocol
* - Host (evaluated without the port)
* - Port (set 'ignorePort80' to ignore "80" values)
* - Hash ( set 'ignoreHash' to disable)
* - Pathname (for relative <-> absolute comparison)
* - Arguments (so they can be out of order)
*
* Parameters:
* url1 - {String}
* url2 - {String}
* options - {Object} Allows for customization of comparison:
* 'ignoreCase' - Default is True
* 'ignorePort80' - Default is True
* 'ignoreHash' - Default is True
*
* Returns:
* {Boolean} Whether or not the two URLs are equivalent
*/
OpenLayers.Util.isEquivalentUrl = function(url1, url2, options) {
options = options || {};
OpenLayers.Util.applyDefaults(options, {
ignoreCase: true,
ignorePort80: true,
ignoreHash: true,
splitArgs: false
});
var urlObj1 = OpenLayers.Util.createUrlObject(url1, options);
var urlObj2 = OpenLayers.Util.createUrlObject(url2, options);
//compare all keys except for "args" (treated below)
for(var key in urlObj1) {
if(key !== "args") {
if(urlObj1[key] != urlObj2[key]) {
return false;
}
}
}
// compare search args - irrespective of order
for(var key in urlObj1.args) {
if(urlObj1.args[key] != urlObj2.args[key]) {
return false;
}
delete urlObj2.args[key];
}
// urlObj2 shouldn't have any args left
for(var key in urlObj2.args) {
return false;
}
return true;
};
/**
* Function: createUrlObject
*
* Parameters:
* url - {String}
* options - {Object} A hash of options.
*
* Valid options:
* ignoreCase - {Boolean} lowercase url,
* ignorePort80 - {Boolean} don't include explicit port if port is 80,
* ignoreHash - {Boolean} Don't include part of url after the hash (#).
* splitArgs - {Boolean} Split comma delimited params into arrays? Default is
* true.
*
* Returns:
* {Object} An object with separate url, a, port, host, and args parsed out
* and ready for comparison
*/
OpenLayers.Util.createUrlObject = function(url, options) {
options = options || {};
// deal with relative urls first
if(!(/^\w+:\/\//).test(url)) {
var loc = window.location;
var port = loc.port ? ":" + loc.port : "";
var fullUrl = loc.protocol + "//" + loc.host.split(":").shift() + port;
if(url.indexOf("/") === 0) {
// full pathname
url = fullUrl + url;
} else {
// relative to current path
var parts = loc.pathname.split("/");
parts.pop();
url = fullUrl + parts.join("/") + "/" + url;
}
}
if (options.ignoreCase) {
url = url.toLowerCase();
}
var a = document.createElement('a');
a.href = url;
var urlObject = {};
//host (without port)
urlObject.host = a.host.split(":").shift();
//protocol
urlObject.protocol = a.protocol;
//port (get uniform browser behavior with port 80 here)
if(options.ignorePort80) {
urlObject.port = (a.port == "80" || a.port == "0") ? "" : a.port;
} else {
urlObject.port = (a.port == "" || a.port == "0") ? "80" : a.port;
}
//hash
urlObject.hash = (options.ignoreHash || a.hash === "#") ? "" : a.hash;
//args
var queryString = a.search;
if (!queryString) {
var qMark = url.indexOf("?");
queryString = (qMark != -1) ? url.substr(qMark) : "";
}
urlObject.args = OpenLayers.Util.getParameters(queryString,
{splitArgs: options.splitArgs});
// pathname
//
// This is a workaround for Internet Explorer where
// window.location.pathname has a leading "/", but
// a.pathname has no leading "/".
urlObject.pathname = (a.pathname.charAt(0) == "/") ? a.pathname : "/" + a.pathname;
return urlObject;
};
/**
* Function: removeTail
* Takes a url and removes everything after the ? and #
*
* Parameters:
* url - {String} The url to process
*
* Returns:
* {String} The string with all queryString and Hash removed
*/
OpenLayers.Util.removeTail = function(url) {
var head = null;
var qMark = url.indexOf("?");
var hashMark = url.indexOf("#");
if (qMark == -1) {
head = (hashMark != -1) ? url.substr(0,hashMark) : url;
} else {
head = (hashMark != -1) ? url.substr(0,Math.min(qMark, hashMark))
: url.substr(0, qMark);
}
return head;
};
/**
* Constant: IS_GECKO
* {Boolean} True if the userAgent reports the browser to use the Gecko engine
*/
OpenLayers.IS_GECKO = (function() {
var ua = navigator.userAgent.toLowerCase();
return ua.indexOf("webkit") == -1 && ua.indexOf("gecko") != -1;
})();
/**
* Constant: CANVAS_SUPPORTED
* {Boolean} True if canvas 2d is supported.
*/
OpenLayers.CANVAS_SUPPORTED = (function() {
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
})();
/**
* Constant: BROWSER_NAME
* {String}
* A substring of the navigator.userAgent property. Depending on the userAgent
* property, this will be the empty string or one of the following:
* * "opera" -- Opera
* * "msie" -- Internet Explorer
* * "safari" -- Safari
* * "firefox" -- Firefox
* * "mozilla" -- Mozilla
*/
OpenLayers.BROWSER_NAME = (function() {
var name = "";
var ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("opera") != -1) {
name = "opera";
} else if (ua.indexOf("msie") != -1) {
name = "msie";
} else if (ua.indexOf("safari") != -1) {
name = "safari";
} else if (ua.indexOf("mozilla") != -1) {
if (ua.indexOf("firefox") != -1) {
name = "firefox";
} else {
name = "mozilla";
}
}
return name;
})();
/**
* Function: getBrowserName
*
* Returns:
* {String} A string which specifies which is the current
* browser in which we are running.
*
* Currently-supported browser detection and codes:
* * 'opera' -- Opera
* * 'msie' -- Internet Explorer
* * 'safari' -- Safari
* * 'firefox' -- Firefox
* * 'mozilla' -- Mozilla
*
* If we are unable to property identify the browser, we
* return an empty string.
*/
OpenLayers.Util.getBrowserName = function() {
return OpenLayers.BROWSER_NAME;
};
/**
* Method: getRenderedDimensions
* Renders the contentHTML offscreen to determine actual dimensions for
* popup sizing. As we need layout to determine dimensions the content
* is rendered -9999px to the left and absolute to ensure the
* scrollbars do not flicker
*
* Parameters:
* contentHTML
* size - {<OpenLayers.Size>} If either the 'w' or 'h' properties is
* specified, we fix that dimension of the div to be measured. This is
* useful in the case where we have a limit in one dimension and must
* therefore meaure the flow in the other dimension.
* options - {Object}
*
* Allowed Options:
* displayClass - {String} Optional parameter. A CSS class name(s) string
* to provide the CSS context of the rendered content.
* containerElement - {DOMElement} Optional parameter. Insert the HTML to
* this node instead of the body root when calculating dimensions.
*
* Returns:
* {<OpenLayers.Size>}
*/
OpenLayers.Util.getRenderedDimensions = function(contentHTML, size, options) {
var w, h;
// create temp container div with restricted size
var container = document.createElement("div");
container.style.visibility = "hidden";
var containerElement = (options && options.containerElement)
? options.containerElement : document.body;
// Opera and IE7 can't handle a node with position:aboslute if it inherits
// position:absolute from a parent.
var parentHasPositionAbsolute = false;
var superContainer = null;
var parent = containerElement;
while (parent && parent.tagName.toLowerCase()!="body") {
var parentPosition = OpenLayers.Element.getStyle(parent, "position");
if(parentPosition == "absolute") {
parentHasPositionAbsolute = true;
break;
} else if (parentPosition && parentPosition != "static") {
break;
}
parent = parent.parentNode;
}
if(parentHasPositionAbsolute && (containerElement.clientHeight === 0 ||
containerElement.clientWidth === 0) ){
superContainer = document.createElement("div");
superContainer.style.visibility = "hidden";
superContainer.style.position = "absolute";
superContainer.style.overflow = "visible";
superContainer.style.width = document.body.clientWidth + "px";
superContainer.style.height = document.body.clientHeight + "px";
superContainer.appendChild(container);
}
container.style.position = "absolute";
//fix a dimension, if specified.
if (size) {
if (size.w) {
w = size.w;
container.style.width = w + "px";
} else if (size.h) {
h = size.h;
container.style.height = h + "px";
}
}
//add css classes, if specified
if (options && options.displayClass) {
container.className = options.displayClass;
}
// create temp content div and assign content
var content = document.createElement("div");
content.innerHTML = contentHTML;
// we need overflow visible when calculating the size
content.style.overflow = "visible";
if (content.childNodes) {
for (var i=0, l=content.childNodes.length; i<l; i++) {
if (!content.childNodes[i].style) continue;
content.childNodes[i].style.overflow = "visible";
}
}
// add content to restricted container
container.appendChild(content);
// append container to body for rendering
if (superContainer) {
containerElement.appendChild(superContainer);
} else {
containerElement.appendChild(container);
}
// calculate scroll width of content and add corners and shadow width
if (!w) {
w = parseInt(content.scrollWidth);
// update container width to allow height to adjust
container.style.width = w + "px";
}
// capture height and add shadow and corner image widths
if (!h) {
h = parseInt(content.scrollHeight);
}
// remove elements
container.removeChild(content);
if (superContainer) {
superContainer.removeChild(container);
containerElement.removeChild(superContainer);
} else {
containerElement.removeChild(container);
}
return new OpenLayers.Size(w, h);
};
/**
* APIFunction: getScrollbarWidth
* This function has been modified by the OpenLayers from the original version,
* written by Matthew Eernisse and released under the Apache 2
* license here:
*
* http://www.fleegix.org/articles/2006/05/30/getting-the-scrollbar-width-in-pixels
*
* It has been modified simply to cache its value, since it is physically
* impossible that this code could ever run in more than one browser at
* once.
*
* Returns:
* {Integer}
*/
OpenLayers.Util.getScrollbarWidth = function() {
var scrollbarWidth = OpenLayers.Util._scrollbarWidth;
if (scrollbarWidth == null) {
var scr = null;
var inn = null;
var wNoScroll = 0;
var wScroll = 0;
// Outer scrolling div
scr = document.createElement('div');
scr.style.position = 'absolute';
scr.style.top = '-1000px';
scr.style.left = '-1000px';
scr.style.width = '100px';
scr.style.height = '50px';
// Start with no scrollbar
scr.style.overflow = 'hidden';
// Inner content div
inn = document.createElement('div');
inn.style.width = '100%';
inn.style.height = '200px';
// Put the inner div in the scrolling div
scr.appendChild(inn);
// Append the scrolling div to the doc
document.body.appendChild(scr);
// Width of the inner div sans scrollbar
wNoScroll = inn.offsetWidth;
// Add the scrollbar
scr.style.overflow = 'scroll';
// Width of the inner div width scrollbar
wScroll = inn.offsetWidth;
// Remove the scrolling div from the doc
document.body.removeChild(document.body.lastChild);
// Pixel width of the scroller
OpenLayers.Util._scrollbarWidth = (wNoScroll - wScroll);
scrollbarWidth = OpenLayers.Util._scrollbarWidth;
}
return scrollbarWidth;
};
/**
* APIFunction: getFormattedLonLat
* This function will return latitude or longitude value formatted as
*
* Parameters:
* coordinate - {Float} the coordinate value to be formatted
* axis - {String} value of either 'lat' or 'lon' to indicate which axis is to
* to be formatted (default = lat)
* dmsOption - {String} specify the precision of the output can be one of:
* 'dms' show degrees minutes and seconds
* 'dm' show only degrees and minutes
* 'd' show only degrees
*
* Returns:
* {String} the coordinate value formatted as a string
*/
OpenLayers.Util.getFormattedLonLat = function(coordinate, axis, dmsOption) {
if (!dmsOption) {
dmsOption = 'dms'; //default to show degree, minutes, seconds
}
coordinate = (coordinate+540)%360 - 180; // normalize for sphere being round
var abscoordinate = Math.abs(coordinate);
var coordinatedegrees = Math.floor(abscoordinate);
var coordinateminutes = (abscoordinate - coordinatedegrees)/(1/60);
var tempcoordinateminutes = coordinateminutes;
coordinateminutes = Math.floor(coordinateminutes);
var coordinateseconds = (tempcoordinateminutes - coordinateminutes)/(1/60);
coordinateseconds = Math.round(coordinateseconds*10);
coordinateseconds /= 10;
if( coordinateseconds >= 60) {
coordinateseconds -= 60;
coordinateminutes += 1;
if( coordinateminutes >= 60) {
coordinateminutes -= 60;
coordinatedegrees += 1;
}
}
if( coordinatedegrees < 10 ) {
coordinatedegrees = "0" + coordinatedegrees;
}
var str = coordinatedegrees + "\u00B0";
if (dmsOption.indexOf('dm') >= 0) {
if( coordinateminutes < 10 ) {
coordinateminutes = "0" + coordinateminutes;
}
str += coordinateminutes + "'";
if (dmsOption.indexOf('dms') >= 0) {
if( coordinateseconds < 10 ) {
coordinateseconds = "0" + coordinateseconds;
}
str += coordinateseconds + '"';
}
}
if (axis == "lon") {
str += coordinate < 0 ? OpenLayers.i18n("W") : OpenLayers.i18n("E");
} else {
str += coordinate < 0 ? OpenLayers.i18n("S") : OpenLayers.i18n("N");
}
return str;
};
/* ======================================================================
OpenLayers/Events.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Util.js
*/
/**
* Namespace: OpenLayers.Event
* Utility functions for event handling.
*/
OpenLayers.Event = {
/**
* Property: observers
* {Object} A hashtable cache of the event observers. Keyed by
* element._eventCacheID
*/
observers: false,
/**
* Constant: KEY_SPACE
* {int}
*/
KEY_SPACE: 32,
/**
* Constant: KEY_BACKSPACE
* {int}
*/
KEY_BACKSPACE: 8,
/**
* Constant: KEY_TAB
* {int}
*/
KEY_TAB: 9,
/**
* Constant: KEY_RETURN
* {int}
*/
KEY_RETURN: 13,
/**
* Constant: KEY_ESC
* {int}
*/
KEY_ESC: 27,
/**
* Constant: KEY_LEFT
* {int}
*/
KEY_LEFT: 37,
/**
* Constant: KEY_UP
* {int}
*/
KEY_UP: 38,
/**
* Constant: KEY_RIGHT
* {int}
*/
KEY_RIGHT: 39,
/**
* Constant: KEY_DOWN
* {int}
*/
KEY_DOWN: 40,
/**
* Constant: KEY_DELETE
* {int}
*/
KEY_DELETE: 46,
/**
* Method: element
* Cross browser event element detection.
*
* Parameters:
* event - {Event}
*
* Returns:
* {DOMElement} The element that caused the event
*/
element: function(event) {
return event.target || event.srcElement;
},
/**
* Method: isSingleTouch
* Determine whether event was caused by a single touch
*
* Parameters:
* event - {Event}
*
* Returns:
* {Boolean}
*/
isSingleTouch: function(event) {
return event.touches && event.touches.length == 1;
},
/**
* Method: isMultiTouch
* Determine whether event was caused by a multi touch
*
* Parameters:
* event - {Event}
*
* Returns:
* {Boolean}
*/
isMultiTouch: function(event) {
return event.touches && event.touches.length > 1;
},
/**
* Method: isLeftClick
* Determine whether event was caused by a left click.
*
* Parameters:
* event - {Event}
*
* Returns:
* {Boolean}
*/
isLeftClick: function(event) {
return (((event.which) && (event.which == 1)) ||
((event.button) && (event.button == 1)));
},
/**
* Method: isRightClick
* Determine whether event was caused by a right mouse click.
*
* Parameters:
* event - {Event}
*
* Returns:
* {Boolean}
*/
isRightClick: function(event) {
return (((event.which) && (event.which == 3)) ||
((event.button) && (event.button == 2)));
},
/**
* Method: stop
* Stops an event from propagating.
*
* Parameters:
* event - {Event}
* allowDefault - {Boolean} If true, we stop the event chain but
* still allow the default browser behaviour (text selection,
* radio-button clicking, etc). Default is false.
*/
stop: function(event, allowDefault) {
if (!allowDefault) {
OpenLayers.Event.preventDefault(event);
}
if (event.stopPropagation) {
event.stopPropagation();
} else {
event.cancelBubble = true;
}
},
/**
* Method: preventDefault
* Cancels the event if it is cancelable, without stopping further
* propagation of the event.
*
* Parameters:
* event - {Event}
*/
preventDefault: function(event) {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
},
/**
* Method: findElement
*
* Parameters:
* event - {Event}
* tagName - {String}
*
* Returns:
* {DOMElement} The first node with the given tagName, starting from the
* node the event was triggered on and traversing the DOM upwards
*/
findElement: function(event, tagName) {
var element = OpenLayers.Event.element(event);
while (element.parentNode && (!element.tagName ||
(element.tagName.toUpperCase() != tagName.toUpperCase()))){
element = element.parentNode;
}
return element;
},
/**
* Method: observe
*
* Parameters:
* elementParam - {DOMElement || String}
* name - {String}
* observer - {function}
* useCapture - {Boolean}
*/
observe: function(elementParam, name, observer, useCapture) {
var element = OpenLayers.Util.getElement(elementParam);
useCapture = useCapture || false;
if (name == 'keypress' &&
(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
|| element.attachEvent)) {
name = 'keydown';
}
//if observers cache has not yet been created, create it
if (!this.observers) {
this.observers = {};
}
//if not already assigned, make a new unique cache ID
if (!element._eventCacheID) {
var idPrefix = "eventCacheID_";
if (element.id) {
idPrefix = element.id + "_" + idPrefix;
}
element._eventCacheID = OpenLayers.Util.createUniqueID(idPrefix);
}
var cacheID = element._eventCacheID;
//if there is not yet a hash entry for this element, add one
if (!this.observers[cacheID]) {
this.observers[cacheID] = [];
}
//add a new observer to this element's list
this.observers[cacheID].push({
'element': element,
'name': name,
'observer': observer,
'useCapture': useCapture
});
//add the actual browser event listener
if (element.addEventListener) {
element.addEventListener(name, observer, useCapture);
} else if (element.attachEvent) {
element.attachEvent('on' + name, observer);
}
},
/**
* Method: stopObservingElement
* Given the id of an element to stop observing, cycle through the
* element's cached observers, calling stopObserving on each one,
* skipping those entries which can no longer be removed.
*
* parameters:
* elementParam - {DOMElement || String}
*/
stopObservingElement: function(elementParam) {
var element = OpenLayers.Util.getElement(elementParam);
var cacheID = element._eventCacheID;
this._removeElementObservers(OpenLayers.Event.observers[cacheID]);
},
/**
* Method: _removeElementObservers
*
* Parameters:
* elementObservers - {Array(Object)} Array of (element, name,
* observer, usecapture) objects,
* taken directly from hashtable
*/
_removeElementObservers: function(elementObservers) {
if (elementObservers) {
for(var i = elementObservers.length-1; i >= 0; i--) {
var entry = elementObservers[i];
OpenLayers.Event.stopObserving.apply(this, [
entry.element, entry.name, entry.observer, entry.useCapture
]);
}
}
},
/**
* Method: stopObserving
*
* Parameters:
* elementParam - {DOMElement || String}
* name - {String}
* observer - {function}
* useCapture - {Boolean}
*
* Returns:
* {Boolean} Whether or not the event observer was removed
*/
stopObserving: function(elementParam, name, observer, useCapture) {
useCapture = useCapture || false;
var element = OpenLayers.Util.getElement(elementParam);
var cacheID = element._eventCacheID;
if (name == 'keypress') {
if ( navigator.appVersion.match(/Konqueror|Safari|KHTML/) ||
element.detachEvent) {
name = 'keydown';
}
}
// find element's entry in this.observers cache and remove it
var foundEntry = false;
var elementObservers = OpenLayers.Event.observers[cacheID];
if (elementObservers) {
// find the specific event type in the element's list
var i=0;
while(!foundEntry && i < elementObservers.length) {
var cacheEntry = elementObservers[i];
if ((cacheEntry.name == name) &&
(cacheEntry.observer == observer) &&
(cacheEntry.useCapture == useCapture)) {
elementObservers.splice(i, 1);
if (elementObservers.length == 0) {
delete OpenLayers.Event.observers[cacheID];
}
foundEntry = true;
break;
}
i++;
}
}
//actually remove the event listener from browser
if (foundEntry) {
if (element.removeEventListener) {
element.removeEventListener(name, observer, useCapture);
} else if (element && element.detachEvent) {
element.detachEvent('on' + name, observer);
}
}
return foundEntry;
},
/**
* Method: unloadCache
* Cycle through all the element entries in the events cache and call
* stopObservingElement on each.
*/
unloadCache: function() {
// check for OpenLayers.Event before checking for observers, because
// OpenLayers.Event may be undefined in IE if no map instance was
// created
if (OpenLayers.Event && OpenLayers.Event.observers) {
for (var cacheID in OpenLayers.Event.observers) {
var elementObservers = OpenLayers.Event.observers[cacheID];
OpenLayers.Event._removeElementObservers.apply(this,
[elementObservers]);
}
OpenLayers.Event.observers = false;
}
},
CLASS_NAME: "OpenLayers.Event"
};
/* prevent memory leaks in IE */
OpenLayers.Event.observe(window, 'unload', OpenLayers.Event.unloadCache, false);
/**
* Class: OpenLayers.Events
*/
OpenLayers.Events = OpenLayers.Class({
/**
* Constant: BROWSER_EVENTS
* {Array(String)} supported events
*/
BROWSER_EVENTS: [
"mouseover", "mouseout",
"mousedown", "mouseup", "mousemove",
"click", "dblclick", "rightclick", "dblrightclick",
"resize", "focus", "blur",
"touchstart", "touchmove", "touchend",
"keydown"
],
/**
* Property: listeners
* {Object} Hashtable of Array(Function): events listener functions
*/
listeners: null,
/**
* Property: object
* {Object} the code object issuing application events
*/
object: null,
/**
* Property: element
* {DOMElement} the DOM element receiving browser events
*/
element: null,
/**
* Property: eventHandler
* {Function} bound event handler attached to elements
*/
eventHandler: null,
/**
* APIProperty: fallThrough
* {Boolean}
*/
fallThrough: null,
/**
* APIProperty: includeXY
* {Boolean} Should the .xy property automatically be created for browser
* mouse events? In general, this should be false. If it is true, then
* mouse events will automatically generate a '.xy' property on the
* event object that is passed. (Prior to OpenLayers 2.7, this was true
* by default.) Otherwise, you can call the getMousePosition on the
* relevant events handler on the object available via the 'evt.object'
* property of the evt object. So, for most events, you can call:
* function named(evt) {
* this.xy = this.object.events.getMousePosition(evt)
* }
*
* This option typically defaults to false for performance reasons:
* when creating an events object whose primary purpose is to manage
* relatively positioned mouse events within a div, it may make
* sense to set it to true.
*
* This option is also used to control whether the events object caches
* offsets. If this is false, it will not: the reason for this is that
* it is only expected to be called many times if the includeXY property
* is set to true. If you set this to true, you are expected to clear
* the offset cache manually (using this.clearMouseCache()) if:
* the border of the element changes
* the location of the element in the page changes
*/
includeXY: false,
/**
* APIProperty: extensions
* {Object} Event extensions registered with this instance. Keys are
* event types, values are {OpenLayers.Events.*} extension instances or
* {Boolean} for events that an instantiated extension provides in
* addition to the one it was created for.
*
* Extensions create an event in addition to browser events, which usually
* fires when a sequence of browser events is completed. Extensions are
* automatically instantiated when a listener is registered for an event
* provided by an extension.
*
* Extensions are created in the <OpenLayers.Events> namespace using
* <OpenLayers.Class>, and named after the event they provide.
* The constructor receives the target <OpenLayers.Events> instance as
* argument. Extensions that need to capture browser events before they
* propagate can register their listeners events using <register>, with
* {extension: true} as 4th argument.
*
* If an extension creates more than one event, an alias for each event
* type should be created and reference the same class. The constructor
* should set a reference in the target's extensions registry to itself.
*
* Below is a minimal extension that provides the "foostart" and "fooend"
* event types, which replace the native "click" event type if clicked on
* an element with the css class "foo":
*
* (code)
* OpenLayers.Events.foostart = OpenLayers.Class({
* initialize: function(target) {
* this.target = target;
* this.target.register("click", this, this.doStuff, {extension: true});
* // only required if extension provides more than one event type
* this.target.extensions["foostart"] = true;
* this.target.extensions["fooend"] = true;
* },
* destroy: function() {
* var target = this.target;
* target.unregister("click", this, this.doStuff);
* delete this.target;
* // only required if extension provides more than one event type
* delete target.extensions["foostart"];
* delete target.extensions["fooend"];
* },
* doStuff: function(evt) {
* var propagate = true;
* if (OpenLayers.Event.element(evt).className === "foo") {
* propagate = false;
* var target = this.target;
* target.triggerEvent("foostart");
* window.setTimeout(function() {
* target.triggerEvent("fooend");
* }, 1000);
* }
* return propagate;
* }
* });
* // only required if extension provides more than one event type
* OpenLayers.Events.fooend = OpenLayers.Events.foostart;
* (end)
*
*/
extensions: null,
/**
* Property: extensionCount
* {Object} Keys are event types (like in <listeners>), values are the
* number of extension listeners for each event type.
*/
extensionCount: null,
/**
* Method: clearMouseListener
* A version of <clearMouseCache> that is bound to this instance so that
* it can be used with <OpenLayers.Event.observe> and
* <OpenLayers.Event.stopObserving>.
*/
clearMouseListener: null,
/**
* Constructor: OpenLayers.Events
* Construct an OpenLayers.Events object.
*
* Parameters:
* object - {Object} The js object to which this Events object is being added
* element - {DOMElement} A dom element to respond to browser events
* eventTypes - {Array(String)} Deprecated. Array of custom application
* events. A listener may be registered for any named event, regardless
* of the values provided here.
* fallThrough - {Boolean} Allow events to fall through after these have
* been handled?
* options - {Object} Options for the events object.
*/
initialize: function (object, element, eventTypes, fallThrough, options) {
OpenLayers.Util.extend(this, options);
this.object = object;
this.fallThrough = fallThrough;
this.listeners = {};
this.extensions = {};
this.extensionCount = {};
this._msTouches = [];
// if a dom element is specified, add a listeners list
// for browser events on the element and register them
if (element != null) {
this.attachToElement(element);
}
},
/**
* APIMethod: destroy
*/
destroy: function () {
for (var e in this.extensions) {
if (typeof this.extensions[e] !== "boolean") {
this.extensions[e].destroy();
}
}
this.extensions = null;
if (this.element) {
OpenLayers.Event.stopObservingElement(this.element);
if(this.element.hasScrollEvent) {
OpenLayers.Event.stopObserving(
window, "scroll", this.clearMouseListener
);
}
}
this.element = null;
this.listeners = null;
this.object = null;
this.fallThrough = null;
this.eventHandler = null;
},
/**
* APIMethod: addEventType
* Deprecated. Any event can be triggered without adding it first.
*
* Parameters:
* eventName - {String}
*/
addEventType: function(eventName) {
},
/**
* Method: attachToElement
*
* Parameters:
* element - {HTMLDOMElement} a DOM element to attach browser events to
*/
attachToElement: function (element) {
if (this.element) {
OpenLayers.Event.stopObservingElement(this.element);
} else {
// keep a bound copy of handleBrowserEvent() so that we can
// pass the same function to both Event.observe() and .stopObserving()
this.eventHandler = OpenLayers.Function.bindAsEventListener(
this.handleBrowserEvent, this
);
// to be used with observe and stopObserving
this.clearMouseListener = OpenLayers.Function.bind(
this.clearMouseCache, this
);
}
this.element = element;
var msTouch = !!window.navigator.msMaxTouchPoints;
var type;
for (var i = 0, len = this.BROWSER_EVENTS.length; i < len; i++) {
type = this.BROWSER_EVENTS[i];
// register the event cross-browser
OpenLayers.Event.observe(element, type, this.eventHandler
);
if (msTouch && type.indexOf('touch') === 0) {
this.addMsTouchListener(element, type, this.eventHandler);
}
}
// disable dragstart in IE so that mousedown/move/up works normally
OpenLayers.Event.observe(element, "dragstart", OpenLayers.Event.stop);
},
/**
* APIMethod: on
* Convenience method for registering listeners with a common scope.
* Internally, this method calls <register> as shown in the examples
* below.
*
* Example use:
* (code)
* // register a single listener for the "loadstart" event
* events.on({"loadstart": loadStartListener});
*
* // this is equivalent to the following
* events.register("loadstart", undefined, loadStartListener);
*
* // register multiple listeners to be called with the same `this` object
* events.on({
* "loadstart": loadStartListener,
* "loadend": loadEndListener,
* scope: object
* });
*
* // this is equivalent to the following
* events.register("loadstart", object, loadStartListener);
* events.register("loadend", object, loadEndListener);
* (end)
*
* Parameters:
* object - {Object}
*/
on: function(object) {
for(var type in object) {
if(type != "scope" && object.hasOwnProperty(type)) {
this.register(type, object.scope, object[type]);
}
}
},
/**
* APIMethod: register
* Register an event on the events object.
*
* When the event is triggered, the 'func' function will be called, in the
* context of 'obj'. Imagine we were to register an event, specifying an
* OpenLayers.Bounds Object as 'obj'. When the event is triggered, the
* context in the callback function will be our Bounds object. This means
* that within our callback function, we can access the properties and
* methods of the Bounds object through the "this" variable. So our
* callback could execute something like:
* : leftStr = "Left: " + this.left;
*
* or
*
* : centerStr = "Center: " + this.getCenterLonLat();
*
* Parameters:
* type - {String} Name of the event to register
* obj - {Object} The object to bind the context to for the callback#.
* If no object is specified, default is the Events's 'object' property.
* func - {Function} The callback function. If no callback is
* specified, this function does nothing.
* priority - {Boolean|Object} If true, adds the new listener to the
* *front* of the events queue instead of to the end.
*
* Valid options for priority:
* extension - {Boolean} If true, then the event will be registered as
* extension event. Extension events are handled before all other
* events.
*/
register: function (type, obj, func, priority) {
if (type in OpenLayers.Events && !this.extensions[type]) {
this.extensions[type] = new OpenLayers.Events[type](this);
}
if (func != null) {
if (obj == null) {
obj = this.object;
}
var listeners = this.listeners[type];
if (!listeners) {
listeners = [];
this.listeners[type] = listeners;
this.extensionCount[type] = 0;
}
var listener = {obj: obj, func: func};
if (priority) {
listeners.splice(this.extensionCount[type], 0, listener);
if (typeof priority === "object" && priority.extension) {
this.extensionCount[type]++;
}
} else {
listeners.push(listener);
}
}
},
/**
* APIMethod: registerPriority
* Same as register() but adds the new listener to the *front* of the
* events queue instead of to the end.
*
* TODO: get rid of this in 3.0 - Decide whether listeners should be
* called in the order they were registered or in reverse order.
*
*
* Parameters:
* type - {String} Name of the event to register
* obj - {Object} The object to bind the context to for the callback#.
* If no object is specified, default is the Events's
* 'object' property.
* func - {Function} The callback function. If no callback is
* specified, this function does nothing.
*/
registerPriority: function (type, obj, func) {
this.register(type, obj, func, true);
},
/**
* APIMethod: un
* Convenience method for unregistering listeners with a common scope.
* Internally, this method calls <unregister> as shown in the examples
* below.
*
* Example use:
* (code)
* // unregister a single listener for the "loadstart" event
* events.un({"loadstart": loadStartListener});
*
* // this is equivalent to the following
* events.unregister("loadstart", undefined, loadStartListener);
*
* // unregister multiple listeners with the same `this` object
* events.un({
* "loadstart": loadStartListener,
* "loadend": loadEndListener,
* scope: object
* });
*
* // this is equivalent to the following
* events.unregister("loadstart", object, loadStartListener);
* events.unregister("loadend", object, loadEndListener);
* (end)
*/
un: function(object) {
for(var type in object) {
if(type != "scope" && object.hasOwnProperty(type)) {
this.unregister(type, object.scope, object[type]);
}
}
},
/**
* APIMethod: unregister
*
* Parameters:
* type - {String}
* obj - {Object} If none specified, defaults to this.object
* func - {Function}
*/
unregister: function (type, obj, func) {
if (obj == null) {
obj = this.object;
}
var listeners = this.listeners[type];
if (listeners != null) {
for (var i=0, len=listeners.length; i<len; i++) {
if (listeners[i].obj == obj && listeners[i].func == func) {
listeners.splice(i, 1);
break;
}
}
}
},
/**
* Method: remove
* Remove all listeners for a given event type. If type is not registered,
* does nothing.
*
* Parameters:
* type - {String}
*/
remove: function(type) {
if (this.listeners[type] != null) {
this.listeners[type] = [];
}
},
/**
* APIMethod: triggerEvent
* Trigger a specified registered event.
*
* Parameters:
* type - {String}
* evt - {Event || Object} will be passed to the listeners.
*
* Returns:
* {Boolean} The last listener return. If a listener returns false, the
* chain of listeners will stop getting called.
*/
triggerEvent: function (type, evt) {
var listeners = this.listeners[type];
// fast path
if(!listeners || listeners.length == 0) {
return undefined;
}
// prep evt object with object & div references
if (evt == null) {
evt = {};
}
evt.object = this.object;
evt.element = this.element;
if(!evt.type) {
evt.type = type;
}
// execute all callbacks registered for specified type
// get a clone of the listeners array to
// allow for splicing during callbacks
listeners = listeners.slice();
var continueChain;
for (var i=0, len=listeners.length; i<len; i++) {
var callback = listeners[i];
// bind the context to callback.obj
continueChain = callback.func.apply(callback.obj, [evt]);
if ((continueChain != undefined) && (continueChain == false)) {
// if callback returns false, execute no more callbacks.
break;
}
}
// don't fall through to other DOM elements
if (!this.fallThrough) {
OpenLayers.Event.stop(evt, true);
}
return continueChain;
},
/**
* Method: handleBrowserEvent
* Basically just a wrapper to the triggerEvent() function, but takes
* care to set a property 'xy' on the event with the current mouse
* position.
*
* Parameters:
* evt - {Event}
*/
handleBrowserEvent: function (evt) {
var type = evt.type, listeners = this.listeners[type];
if(!listeners || listeners.length == 0) {
// noone's listening, bail out
return;
}
// add clientX & clientY to all events - corresponds to average x, y
var touches = evt.touches;
if (touches && touches[0]) {
var x = 0;
var y = 0;
var num = touches.length;
var touch;
for (var i=0; i<num; ++i) {
touch = this.getTouchClientXY(touches[i]);
x += touch.clientX;
y += touch.clientY;
}
evt.clientX = x / num;
evt.clientY = y / num;
}
if (this.includeXY) {
evt.xy = this.getMousePosition(evt);
}
this.triggerEvent(type, evt);
},
/**
* Method: getTouchClientXY
* WebKit has a few bugs for clientX/clientY. This method detects them
* and calculate the correct values.
*
* Parameters:
* evt - {Touch} a Touch object from a TouchEvent
*
* Returns:
* {Object} An object with only clientX and clientY properties with the
* calculated values.
*/
getTouchClientXY: function (evt) {
// olMochWin is to override window, used for testing
var win = window.olMockWin || window,
winPageX = win.pageXOffset,
winPageY = win.pageYOffset,
x = evt.clientX,
y = evt.clientY;
if (evt.pageY === 0 && Math.floor(y) > Math.floor(evt.pageY) ||
evt.pageX === 0 && Math.floor(x) > Math.floor(evt.pageX)) {
// iOS4 include scroll offset in clientX/Y
x = x - winPageX;
y = y - winPageY;
} else if (y < (evt.pageY - winPageY) || x < (evt.pageX - winPageX) ) {
// Some Android browsers have totally bogus values for clientX/Y
// when scrolling/zooming a page
x = evt.pageX - winPageX;
y = evt.pageY - winPageY;
}
evt.olClientX = x;
evt.olClientY = y;
return {
clientX: x,
clientY: y
};
},
/**
* APIMethod: clearMouseCache
* Clear cached data about the mouse position. This should be called any
* time the element that events are registered on changes position
* within the page.
*/
clearMouseCache: function() {
this.element.scrolls = null;
this.element.lefttop = null;
this.element.offsets = null;
},
/**
* Method: getMousePosition
*
* Parameters:
* evt - {Event}
*
* Returns:
* {<OpenLayers.Pixel>} The current xy coordinate of the mouse, adjusted
* for offsets
*/
getMousePosition: function (evt) {
if (!this.includeXY) {
this.clearMouseCache();
} else if (!this.element.hasScrollEvent) {
OpenLayers.Event.observe(window, "scroll", this.clearMouseListener);
this.element.hasScrollEvent = true;
}
if (!this.element.scrolls) {
var viewportElement = OpenLayers.Util.getViewportElement();
this.element.scrolls = [
window.pageXOffset || viewportElement.scrollLeft,
window.pageYOffset || viewportElement.scrollTop
];
}
if (!this.element.lefttop) {
this.element.lefttop = [
(document.documentElement.clientLeft || 0),
(document.documentElement.clientTop || 0)
];
}
if (!this.element.offsets) {
this.element.offsets = OpenLayers.Util.pagePosition(this.element);
}
return new OpenLayers.Pixel(
(evt.clientX + this.element.scrolls[0]) - this.element.offsets[0]
- this.element.lefttop[0],
(evt.clientY + this.element.scrolls[1]) - this.element.offsets[1]
- this.element.lefttop[1]
);
},
/**
* Method: addMsTouchListener
*
* Parameters:
* element - {DOMElement} The DOM element to register the listener on
* type - {String} The event type
* handler - {Function} the handler
*/
addMsTouchListener: function (element, type, handler) {
var eventHandler = this.eventHandler;
var touches = this._msTouches;
function msHandler(evt) {
handler(OpenLayers.Util.applyDefaults({
stopPropagation: function() {
for (var i=touches.length-1; i>=0; --i) {
touches[i].stopPropagation();
}
},
preventDefault: function() {
for (var i=touches.length-1; i>=0; --i) {
touches[i].preventDefault();
}
},
type: type
}, evt));
}
switch (type) {
case 'touchstart':
return this.addMsTouchListenerStart(element, type, msHandler);
case 'touchend':
return this.addMsTouchListenerEnd(element, type, msHandler);
case 'touchmove':
return this.addMsTouchListenerMove(element, type, msHandler);
default:
throw 'Unknown touch event type';
}
},
/**
* Method: addMsTouchListenerStart
*
* Parameters:
* element - {DOMElement} The DOM element to register the listener on
* type - {String} The event type
* handler - {Function} the handler
*/
addMsTouchListenerStart: function(element, type, handler) {
var touches = this._msTouches;
var cb = function(e) {
var alreadyInArray = false;
for (var i=0, ii=touches.length; i<ii; ++i) {
if (touches[i].pointerId == e.pointerId) {
alreadyInArray = true;
break;
}
}
if (!alreadyInArray) {
touches.push(e);
}
e.touches = touches.slice();
handler(e);
};
OpenLayers.Event.observe(element, 'MSPointerDown', cb);
// Need to also listen for end events to keep the _msTouches list
// accurate
var internalCb = function(e) {
for (var i=0, ii=touches.length; i<ii; ++i) {
if (touches[i].pointerId == e.pointerId) {
touches.splice(i, 1);
break;
}
}
};
OpenLayers.Event.observe(element, 'MSPointerUp', internalCb);
},
/**
* Method: addMsTouchListenerMove
*
* Parameters:
* element - {DOMElement} The DOM element to register the listener on
* type - {String} The event type
* handler - {Function} the handler
*/
addMsTouchListenerMove: function (element, type, handler) {
var touches = this._msTouches;
var cb = function(e) {
//Don't fire touch moves when mouse isn't down
if (e.pointerType == e.MSPOINTER_TYPE_MOUSE && e.buttons == 0) {
return;
}
if (touches.length == 1 && touches[0].pageX == e.pageX &&
touches[0].pageY == e.pageY) {
// don't trigger event when pointer has not moved
return;
}
for (var i=0, ii=touches.length; i<ii; ++i) {
if (touches[i].pointerId == e.pointerId) {
touches[i] = e;
break;
}
}
e.touches = touches.slice();
handler(e);
};
OpenLayers.Event.observe(element, 'MSPointerMove', cb);
},
/**
* Method: addMsTouchListenerEnd
*
* Parameters:
* element - {DOMElement} The DOM element to register the listener on
* type - {String} The event type
* handler - {Function} the handler
*/
addMsTouchListenerEnd: function (element, type, handler) {
var touches = this._msTouches;
var cb = function(e) {
for (var i=0, ii=touches.length; i<ii; ++i) {
if (touches[i].pointerId == e.pointerId) {
touches.splice(i, 1);
break;
}
}
e.touches = touches.slice();
handler(e);
};
OpenLayers.Event.observe(element, 'MSPointerUp', cb);
},
CLASS_NAME: "OpenLayers.Events"
});
/* ======================================================================
OpenLayers/Events/buttonclick.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Events.js
*/
/**
* Class: OpenLayers.Events.buttonclick
* Extension event type for handling buttons on top of a dom element. This
* event type fires "buttonclick" on its <target> when a button was
* clicked. Buttons are detected by the "olButton" class.
*
* This event type makes sure that button clicks do not interfere with other
* events that are registered on the same <element>.
*
* Event types provided by this extension:
* - *buttonclick* Triggered when a button is clicked. Listeners receive an
* object with a *buttonElement* property referencing the dom element of
* the clicked button, and an *buttonXY* property with the click position
* relative to the button.
*/
OpenLayers.Events.buttonclick = OpenLayers.Class({
/**
* Property: target
* {<OpenLayers.Events>} The events instance that the buttonclick event will
* be triggered on.
*/
target: null,
/**
* Property: events
* {Array} Events to observe and conditionally stop from propagating when
* an element with the olButton class (or its olAlphaImg child) is
* clicked.
*/
events: [
'mousedown', 'mouseup', 'click', 'dblclick',
'touchstart', 'touchmove', 'touchend', 'keydown'
],
/**
* Property: startRegEx
* {RegExp} Regular expression to test Event.type for events that start
* a buttonclick sequence.
*/
startRegEx: /^mousedown|touchstart$/,
/**
* Property: cancelRegEx
* {RegExp} Regular expression to test Event.type for events that cancel
* a buttonclick sequence.
*/
cancelRegEx: /^touchmove$/,
/**
* Property: completeRegEx
* {RegExp} Regular expression to test Event.type for events that complete
* a buttonclick sequence.
*/
completeRegEx: /^mouseup|touchend$/,
/**
* Property: startEvt
* {Event} The event that started the click sequence
*/
/**
* Constructor: OpenLayers.Events.buttonclick
* Construct a buttonclick event type. Applications are not supposed to
* create instances of this class - they are created on demand by
* <OpenLayers.Events> instances.
*
* Parameters:
* target - {<OpenLayers.Events>} The events instance that the buttonclick
* event will be triggered on.
*/
initialize: function(target) {
this.target = target;
for (var i=this.events.length-1; i>=0; --i) {
this.target.register(this.events[i], this, this.buttonClick, {
extension: true
});
}
},
/**
* Method: destroy
*/
destroy: function() {
for (var i=this.events.length-1; i>=0; --i) {
this.target.unregister(this.events[i], this, this.buttonClick);
}
delete this.target;
},
/**
* Method: getPressedButton
* Get the pressed button, if any. Returns undefined if no button
* was pressed.
*
* Arguments:
* element - {DOMElement} The event target.
*
* Returns:
* {DOMElement} The button element, or undefined.
*/
getPressedButton: function(element) {
var depth = 3, // limit the search depth
button;
do {
if(OpenLayers.Element.hasClass(element, "olButton")) {
// hit!
button = element;
break;
}
element = element.parentNode;
} while(--depth > 0 && element);
return button;
},
/**
* Method: ignore
* Check for event target elements that should be ignored by OpenLayers.
*
* Parameters:
* element - {DOMElement} The event target.
*/
ignore: function(element) {
var depth = 3,
ignore = false;
do {
if (element.nodeName.toLowerCase() === 'a') {
ignore = true;
break;
}
element = element.parentNode;
} while (--depth > 0 && element);
return ignore;
},
/**
* Method: buttonClick
* Check if a button was clicked, and fire the buttonclick event
*
* Parameters:
* evt - {Event}
*/
buttonClick: function(evt) {
var propagate = true,
element = OpenLayers.Event.element(evt);
if (element && (OpenLayers.Event.isLeftClick(evt) || !~evt.type.indexOf("mouse"))) {
// was a button pressed?
var button = this.getPressedButton(element);
if (button) {
if (evt.type === "keydown") {
switch (evt.keyCode) {
case OpenLayers.Event.KEY_RETURN:
case OpenLayers.Event.KEY_SPACE:
this.target.triggerEvent("buttonclick", {
buttonElement: button
});
OpenLayers.Event.stop(evt);
propagate = false;
break;
}
} else if (this.startEvt) {
if (this.completeRegEx.test(evt.type)) {
var pos = OpenLayers.Util.pagePosition(button);
var viewportElement = OpenLayers.Util.getViewportElement();
var scrollTop = window.pageYOffset || viewportElement.scrollTop;
var scrollLeft = window.pageXOffset || viewportElement.scrollLeft;
pos[0] = pos[0] - scrollLeft;
pos[1] = pos[1] - scrollTop;
this.target.triggerEvent("buttonclick", {
buttonElement: button,
buttonXY: {
x: this.startEvt.clientX - pos[0],
y: this.startEvt.clientY - pos[1]
}
});
}
if (this.cancelRegEx.test(evt.type)) {
delete this.startEvt;
}
OpenLayers.Event.stop(evt);
propagate = false;
}
if (this.startRegEx.test(evt.type)) {
this.startEvt = evt;
OpenLayers.Event.stop(evt);
propagate = false;
}
} else {
propagate = !this.ignore(OpenLayers.Event.element(evt));
delete this.startEvt;
}
}
return propagate;
}
});
/* ======================================================================
OpenLayers/Control.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Control
* Controls affect the display or behavior of the map. They allow everything
* from panning and zooming to displaying a scale indicator. Controls by
* default are added to the map they are contained within however it is
* possible to add a control to an external div by passing the div in the
* options parameter.
*
* Example:
* The following example shows how to add many of the common controls
* to a map.
*
* > var map = new OpenLayers.Map('map', { controls: [] });
* >
* > map.addControl(new OpenLayers.Control.PanZoomBar());
* > map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
* > map.addControl(new OpenLayers.Control.Permalink());
* > map.addControl(new OpenLayers.Control.Permalink('permalink'));
* > map.addControl(new OpenLayers.Control.MousePosition());
* > map.addControl(new OpenLayers.Control.OverviewMap());
* > map.addControl(new OpenLayers.Control.KeyboardDefaults());
*
* The next code fragment is a quick example of how to intercept
* shift-mouse click to display the extent of the bounding box
* dragged out by the user. Usually controls are not created
* in exactly this manner. See the source for a more complete
* example:
*
* > var control = new OpenLayers.Control();
* > OpenLayers.Util.extend(control, {
* > draw: function () {
* > // this Handler.Box will intercept the shift-mousedown
* > // before Control.MouseDefault gets to see it
* > this.box = new OpenLayers.Handler.Box( control,
* > {"done": this.notice},
* > {keyMask: OpenLayers.Handler.MOD_SHIFT});
* > this.box.activate();
* > },
* >
* > notice: function (bounds) {
* > OpenLayers.Console.userError(bounds);
* > }
* > });
* > map.addControl(control);
*
*/
OpenLayers.Control = OpenLayers.Class({
/**
* Property: id
* {String}
*/
id: null,
/**
* Property: map
* {<OpenLayers.Map>} this gets set in the addControl() function in
* OpenLayers.Map
*/
map: null,
/**
* APIProperty: div
* {DOMElement} The element that contains the control, if not present the
* control is placed inside the map.
*/
div: null,
/**
* APIProperty: type
* {Number} Controls can have a 'type'. The type determines the type of
* interactions which are possible with them when they are placed in an
* <OpenLayers.Control.Panel>.
*/
type: null,
/**
* Property: allowSelection
* {Boolean} By default, controls do not allow selection, because
* it may interfere with map dragging. If this is true, OpenLayers
* will not prevent selection of the control.
* Default is false.
*/
allowSelection: false,
/**
* Property: displayClass
* {string} This property is used for CSS related to the drawing of the
* Control.
*/
displayClass: "",
/**
* APIProperty: title
* {string} This property is used for showing a tooltip over the
* Control.
*/
title: "",
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* false.
*/
autoActivate: false,
/**
* APIProperty: active
* {Boolean} The control is active (read-only). Use <activate> and
* <deactivate> to change control state.
*/
active: null,
/**
* Property: handlerOptions
* {Object} Used to set non-default properties on the control's handler
*/
handlerOptions: null,
/**
* Property: handler
* {<OpenLayers.Handler>} null
*/
handler: null,
/**
* APIProperty: eventListeners
* {Object} If set as an option at construction, the eventListeners
* object will be registered with <OpenLayers.Events.on>. Object
* structure must be a listeners object as shown in the example for
* the events.on method.
*/
eventListeners: null,
/**
* APIProperty: events
* {<OpenLayers.Events>} Events instance for listeners and triggering
* control specific events.
*
* Register a listener for a particular event with the following syntax:
* (code)
* control.events.register(type, obj, listener);
* (end)
*
* Listeners will be called with a reference to an event object. The
* properties of this event depends on exactly what happened.
*
* All event objects have at least the following properties:
* object - {Object} A reference to control.events.object (a reference
* to the control).
* element - {DOMElement} A reference to control.events.element (which
* will be null unless documented otherwise).
*
* Supported map event types:
* activate - Triggered when activated.
* deactivate - Triggered when deactivated.
*/
events: null,
/**
* Constructor: OpenLayers.Control
* Create an OpenLayers Control. The options passed as a parameter
* directly extend the control. For example passing the following:
*
* > var control = new OpenLayers.Control({div: myDiv});
*
* Overrides the default div attribute value of null.
*
* Parameters:
* options - {Object}
*/
initialize: function (options) {
// We do this before the extend so that instances can override
// className in options.
this.displayClass =
this.CLASS_NAME.replace("OpenLayers.", "ol").replace(/\./g, "");
OpenLayers.Util.extend(this, options);
this.events = new OpenLayers.Events(this);
if(this.eventListeners instanceof Object) {
this.events.on(this.eventListeners);
}
if (this.id == null) {
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
}
},
/**
* Method: destroy
* The destroy method is used to perform any clean up before the control
* is dereferenced. Typically this is where event listeners are removed
* to prevent memory leaks.
*/
destroy: function () {
if(this.events) {
if(this.eventListeners) {
this.events.un(this.eventListeners);
}
this.events.destroy();
this.events = null;
}
this.eventListeners = null;
// eliminate circular references
if (this.handler) {
this.handler.destroy();
this.handler = null;
}
if(this.handlers) {
for(var key in this.handlers) {
if(this.handlers.hasOwnProperty(key) &&
typeof this.handlers[key].destroy == "function") {
this.handlers[key].destroy();
}
}
this.handlers = null;
}
if (this.map) {
this.map.removeControl(this);
this.map = null;
}
this.div = null;
},
/**
* Method: setMap
* Set the map property for the control. This is done through an accessor
* so that subclasses can override this and take special action once
* they have their map variable set.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
this.map = map;
if (this.handler) {
this.handler.setMap(map);
}
},
/**
* Method: draw
* The draw method is called when the control is ready to be displayed
* on the page. If a div has not been created one is created. Controls
* with a visual component will almost always want to override this method
* to customize the look of control.
*
* Parameters:
* px - {<OpenLayers.Pixel>} The top-left pixel position of the control
* or null.
*
* Returns:
* {DOMElement} A reference to the DIV DOMElement containing the control
*/
draw: function (px) {
if (this.div == null) {
this.div = OpenLayers.Util.createDiv(this.id);
this.div.className = this.displayClass;
if (!this.allowSelection) {
this.div.className += " olControlNoSelect";
this.div.setAttribute("unselectable", "on", 0);
this.div.onselectstart = OpenLayers.Function.False;
}
if (this.title != "") {
this.div.title = this.title;
}
}
if (px != null) {
this.position = px.clone();
}
this.moveTo(this.position);
return this.div;
},
/**
* Method: moveTo
* Sets the left and top style attributes to the passed in pixel
* coordinates.
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*/
moveTo: function (px) {
if ((px != null) && (this.div != null)) {
this.div.style.left = px.x + "px";
this.div.style.top = px.y + "px";
}
},
/**
* APIMethod: activate
* Explicitly activates a control and it's associated
* handler if one has been set. Controls can be
* deactivated by calling the deactivate() method.
*
* Returns:
* {Boolean} True if the control was successfully activated or
* false if the control was already active.
*/
activate: function () {
if (this.active) {
return false;
}
if (this.handler) {
this.handler.activate();
}
this.active = true;
if(this.map) {
OpenLayers.Element.addClass(
this.map.viewPortDiv,
this.displayClass.replace(/ /g, "") + "Active"
);
}
this.events.triggerEvent("activate");
return true;
},
/**
* APIMethod: deactivate
* Deactivates a control and it's associated handler if any. The exact
* effect of this depends on the control itself.
*
* Returns:
* {Boolean} True if the control was effectively deactivated or false
* if the control was already inactive.
*/
deactivate: function () {
if (this.active) {
if (this.handler) {
this.handler.deactivate();
}
this.active = false;
if(this.map) {
OpenLayers.Element.removeClass(
this.map.viewPortDiv,
this.displayClass.replace(/ /g, "") + "Active"
);
}
this.events.triggerEvent("deactivate");
return true;
}
return false;
},
CLASS_NAME: "OpenLayers.Control"
});
/**
* Constant: OpenLayers.Control.TYPE_BUTTON
*/
OpenLayers.Control.TYPE_BUTTON = 1;
/**
* Constant: OpenLayers.Control.TYPE_TOGGLE
*/
OpenLayers.Control.TYPE_TOGGLE = 2;
/**
* Constant: OpenLayers.Control.TYPE_TOOL
*/
OpenLayers.Control.TYPE_TOOL = 3;
/* ======================================================================
OpenLayers/Geometry.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Geometry
* A Geometry is a description of a geographic object. Create an instance of
* this class with the <OpenLayers.Geometry> constructor. This is a base class,
* typical geometry types are described by subclasses of this class.
*
* Note that if you use the <OpenLayers.Geometry.fromWKT> method, you must
* explicitly include the OpenLayers.Format.WKT in your build.
*/
OpenLayers.Geometry = OpenLayers.Class({
/**
* Property: id
* {String} A unique identifier for this geometry.
*/
id: null,
/**
* Property: parent
* {<OpenLayers.Geometry>}This is set when a Geometry is added as component
* of another geometry
*/
parent: null,
/**
* Property: bounds
* {<OpenLayers.Bounds>} The bounds of this geometry
*/
bounds: null,
/**
* Constructor: OpenLayers.Geometry
* Creates a geometry object.
*/
initialize: function() {
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME+ "_");
},
/**
* Method: destroy
* Destroy this geometry.
*/
destroy: function() {
this.id = null;
this.bounds = null;
},
/**
* APIMethod: clone
* Create a clone of this geometry. Does not set any non-standard
* properties of the cloned geometry.
*
* Returns:
* {<OpenLayers.Geometry>} An exact clone of this geometry.
*/
clone: function() {
return new OpenLayers.Geometry();
},
/**
* Method: setBounds
* Set the bounds for this Geometry.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*/
setBounds: function(bounds) {
if (bounds) {
this.bounds = bounds.clone();
}
},
/**
* Method: clearBounds
* Nullify this components bounds and that of its parent as well.
*/
clearBounds: function() {
this.bounds = null;
if (this.parent) {
this.parent.clearBounds();
}
},
/**
* Method: extendBounds
* Extend the existing bounds to include the new bounds.
* If geometry's bounds is not yet set, then set a new Bounds.
*
* Parameters:
* newBounds - {<OpenLayers.Bounds>}
*/
extendBounds: function(newBounds){
var bounds = this.getBounds();
if (!bounds) {
this.setBounds(newBounds);
} else {
this.bounds.extend(newBounds);
}
},
/**
* APIMethod: getBounds
* Get the bounds for this Geometry. If bounds is not set, it
* is calculated again, this makes queries faster.
*
* Returns:
* {<OpenLayers.Bounds>}
*/
getBounds: function() {
if (this.bounds == null) {
this.calculateBounds();
}
return this.bounds;
},
/**
* APIMethod: calculateBounds
* Recalculate the bounds for the geometry.
*/
calculateBounds: function() {
//
// This should be overridden by subclasses.
//
},
/**
* APIMethod: distanceTo
* Calculate the closest distance between two geometries (on the x-y plane).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Optional properties for configuring the distance
* calculation.
*
* Valid options depend on the specific geometry type.
*
* Returns:
* {Number | Object} The distance between this geometry and the target.
* If details is true, the return will be an object with distance,
* x0, y0, x1, and x2 properties. The x0 and y0 properties represent
* the coordinates of the closest point on this geometry. The x1 and y1
* properties represent the coordinates of the closest point on the
* target geometry.
*/
distanceTo: function(geometry, options) {
},
/**
* APIMethod: getVertices
* Return a list of all points in this geometry.
*
* Parameters:
* nodes - {Boolean} For lines, only return vertices that are
* endpoints. If false, for lines, only vertices that are not
* endpoints will be returned. If not provided, all vertices will
* be returned.
*
* Returns:
* {Array} A list of all vertices in the geometry.
*/
getVertices: function(nodes) {
},
/**
* Method: atPoint
* Note - This is only an approximation based on the bounds of the
* geometry.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
* object with a 'lon' and 'lat' properties.
* toleranceLon - {float} Optional tolerance in Geometric Coords
* toleranceLat - {float} Optional tolerance in Geographic Coords
*
* Returns:
* {Boolean} Whether or not the geometry is at the specified location
*/
atPoint: function(lonlat, toleranceLon, toleranceLat) {
var atPoint = false;
var bounds = this.getBounds();
if ((bounds != null) && (lonlat != null)) {
var dX = (toleranceLon != null) ? toleranceLon : 0;
var dY = (toleranceLat != null) ? toleranceLat : 0;
var toleranceBounds =
new OpenLayers.Bounds(this.bounds.left - dX,
this.bounds.bottom - dY,
this.bounds.right + dX,
this.bounds.top + dY);
atPoint = toleranceBounds.containsLonLat(lonlat);
}
return atPoint;
},
/**
* Method: getLength
* Calculate the length of this geometry. This method is defined in
* subclasses.
*
* Returns:
* {Float} The length of the collection by summing its parts
*/
getLength: function() {
//to be overridden by geometries that actually have a length
//
return 0.0;
},
/**
* Method: getArea
* Calculate the area of this geometry. This method is defined in subclasses.
*
* Returns:
* {Float} The area of the collection by summing its parts
*/
getArea: function() {
//to be overridden by geometries that actually have an area
//
return 0.0;
},
/**
* APIMethod: getCentroid
* Calculate the centroid of this geometry. This method is defined in subclasses.
*
* Returns:
* {<OpenLayers.Geometry.Point>} The centroid of the collection
*/
getCentroid: function() {
return null;
},
/**
* Method: toString
* Returns a text representation of the geometry. If the WKT format is
* included in a build, this will be the Well-Known Text
* representation.
*
* Returns:
* {String} String representation of this geometry.
*/
toString: function() {
var string;
if (OpenLayers.Format && OpenLayers.Format.WKT) {
string = OpenLayers.Format.WKT.prototype.write(
new OpenLayers.Feature.Vector(this)
);
} else {
string = Object.prototype.toString.call(this);
}
return string;
},
CLASS_NAME: "OpenLayers.Geometry"
});
/**
* Function: OpenLayers.Geometry.fromWKT
* Generate a geometry given a Well-Known Text string. For this method to
* work, you must include the OpenLayers.Format.WKT in your build
* explicitly.
*
* Parameters:
* wkt - {String} A string representing the geometry in Well-Known Text.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry of the appropriate class.
*/
OpenLayers.Geometry.fromWKT = function(wkt) {
var geom;
if (OpenLayers.Format && OpenLayers.Format.WKT) {
var format = OpenLayers.Geometry.fromWKT.format;
if (!format) {
format = new OpenLayers.Format.WKT();
OpenLayers.Geometry.fromWKT.format = format;
}
var result = format.read(wkt);
if (result instanceof OpenLayers.Feature.Vector) {
geom = result.geometry;
} else if (OpenLayers.Util.isArray(result)) {
var len = result.length;
var components = new Array(len);
for (var i=0; i<len; ++i) {
components[i] = result[i].geometry;
}
geom = new OpenLayers.Geometry.Collection(components);
}
}
return geom;
};
/**
* Method: OpenLayers.Geometry.segmentsIntersect
* Determine whether two line segments intersect. Optionally calculates
* and returns the intersection point. This function is optimized for
* cases where seg1.x2 >= seg2.x1 || seg2.x2 >= seg1.x1. In those
* obvious cases where there is no intersection, the function should
* not be called.
*
* Parameters:
* seg1 - {Object} Object representing a segment with properties x1, y1, x2,
* and y2. The start point is represented by x1 and y1. The end point
* is represented by x2 and y2. Start and end are ordered so that x1 < x2.
* seg2 - {Object} Object representing a segment with properties x1, y1, x2,
* and y2. The start point is represented by x1 and y1. The end point
* is represented by x2 and y2. Start and end are ordered so that x1 < x2.
* options - {Object} Optional properties for calculating the intersection.
*
* Valid options:
* point - {Boolean} Return the intersection point. If false, the actual
* intersection point will not be calculated. If true and the segments
* intersect, the intersection point will be returned. If true and
* the segments do not intersect, false will be returned. If true and
* the segments are coincident, true will be returned.
* tolerance - {Number} If a non-null value is provided, if the segments are
* within the tolerance distance, this will be considered an intersection.
* In addition, if the point option is true and the calculated intersection
* is within the tolerance distance of an end point, the endpoint will be
* returned instead of the calculated intersection. Further, if the
* intersection is within the tolerance of endpoints on both segments, or
* if two segment endpoints are within the tolerance distance of eachother
* (but no intersection is otherwise calculated), an endpoint on the
* first segment provided will be returned.
*
* Returns:
* {Boolean | <OpenLayers.Geometry.Point>} The two segments intersect.
* If the point argument is true, the return will be the intersection
* point or false if none exists. If point is true and the segments
* are coincident, return will be true (and the instersection is equal
* to the shorter segment).
*/
OpenLayers.Geometry.segmentsIntersect = function(seg1, seg2, options) {
var point = options && options.point;
var tolerance = options && options.tolerance;
var intersection = false;
var x11_21 = seg1.x1 - seg2.x1;
var y11_21 = seg1.y1 - seg2.y1;
var x12_11 = seg1.x2 - seg1.x1;
var y12_11 = seg1.y2 - seg1.y1;
var y22_21 = seg2.y2 - seg2.y1;
var x22_21 = seg2.x2 - seg2.x1;
var d = (y22_21 * x12_11) - (x22_21 * y12_11);
var n1 = (x22_21 * y11_21) - (y22_21 * x11_21);
var n2 = (x12_11 * y11_21) - (y12_11 * x11_21);
if(d == 0) {
// parallel
if(n1 == 0 && n2 == 0) {
// coincident
intersection = true;
}
} else {
var along1 = n1 / d;
var along2 = n2 / d;
if(along1 >= 0 && along1 <= 1 && along2 >=0 && along2 <= 1) {
// intersect
if(!point) {
intersection = true;
} else {
// calculate the intersection point
var x = seg1.x1 + (along1 * x12_11);
var y = seg1.y1 + (along1 * y12_11);
intersection = new OpenLayers.Geometry.Point(x, y);
}
}
}
if(tolerance) {
var dist;
if(intersection) {
if(point) {
var segs = [seg1, seg2];
var seg, x, y;
// check segment endpoints for proximity to intersection
// set intersection to first endpoint within the tolerance
outer: for(var i=0; i<2; ++i) {
seg = segs[i];
for(var j=1; j<3; ++j) {
x = seg["x" + j];
y = seg["y" + j];
dist = Math.sqrt(
Math.pow(x - intersection.x, 2) +
Math.pow(y - intersection.y, 2)
);
if(dist < tolerance) {
intersection.x = x;
intersection.y = y;
break outer;
}
}
}
}
} else {
// no calculated intersection, but segments could be within
// the tolerance of one another
var segs = [seg1, seg2];
var source, target, x, y, p, result;
// check segment endpoints for proximity to intersection
// set intersection to first endpoint within the tolerance
outer: for(var i=0; i<2; ++i) {
source = segs[i];
target = segs[(i+1)%2];
for(var j=1; j<3; ++j) {
p = {x: source["x"+j], y: source["y"+j]};
result = OpenLayers.Geometry.distanceToSegment(p, target);
if(result.distance < tolerance) {
if(point) {
intersection = new OpenLayers.Geometry.Point(p.x, p.y);
} else {
intersection = true;
}
break outer;
}
}
}
}
}
return intersection;
};
/**
* Function: OpenLayers.Geometry.distanceToSegment
*
* Parameters:
* point - {Object} An object with x and y properties representing the
* point coordinates.
* segment - {Object} An object with x1, y1, x2, and y2 properties
* representing endpoint coordinates.
*
* Returns:
* {Object} An object with distance, along, x, and y properties. The distance
* will be the shortest distance between the input point and segment.
* The x and y properties represent the coordinates along the segment
* where the shortest distance meets the segment. The along attribute
* describes how far between the two segment points the given point is.
*/
OpenLayers.Geometry.distanceToSegment = function(point, segment) {
var result = OpenLayers.Geometry.distanceSquaredToSegment(point, segment);
result.distance = Math.sqrt(result.distance);
return result;
};
/**
* Function: OpenLayers.Geometry.distanceSquaredToSegment
*
* Usually the distanceToSegment function should be used. This variant however
* can be used for comparisons where the exact distance is not important.
*
* Parameters:
* point - {Object} An object with x and y properties representing the
* point coordinates.
* segment - {Object} An object with x1, y1, x2, and y2 properties
* representing endpoint coordinates.
*
* Returns:
* {Object} An object with squared distance, along, x, and y properties.
* The distance will be the shortest distance between the input point and
* segment. The x and y properties represent the coordinates along the
* segment where the shortest distance meets the segment. The along
* attribute describes how far between the two segment points the given
* point is.
*/
OpenLayers.Geometry.distanceSquaredToSegment = function(point, segment) {
var x0 = point.x;
var y0 = point.y;
var x1 = segment.x1;
var y1 = segment.y1;
var x2 = segment.x2;
var y2 = segment.y2;
var dx = x2 - x1;
var dy = y2 - y1;
var along = ((dx * (x0 - x1)) + (dy * (y0 - y1))) /
(Math.pow(dx, 2) + Math.pow(dy, 2));
var x, y;
if(along <= 0.0) {
x = x1;
y = y1;
} else if(along >= 1.0) {
x = x2;
y = y2;
} else {
x = x1 + along * dx;
y = y1 + along * dy;
}
return {
distance: Math.pow(x - x0, 2) + Math.pow(y - y0, 2),
x: x, y: y,
along: along
};
};
/* ======================================================================
OpenLayers/Geometry/Collection.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry.js
*/
/**
* Class: OpenLayers.Geometry.Collection
* A Collection is exactly what it sounds like: A collection of different
* Geometries. These are stored in the local parameter <components> (which
* can be passed as a parameter to the constructor).
*
* As new geometries are added to the collection, they are NOT cloned.
* When removing geometries, they need to be specified by reference (ie you
* have to pass in the *exact* geometry to be removed).
*
* The <getArea> and <getLength> functions here merely iterate through
* the components, summing their respective areas and lengths.
*
* Create a new instance with the <OpenLayers.Geometry.Collection> constructor.
*
* Inherits from:
* - <OpenLayers.Geometry>
*/
OpenLayers.Geometry.Collection = OpenLayers.Class(OpenLayers.Geometry, {
/**
* APIProperty: components
* {Array(<OpenLayers.Geometry>)} The component parts of this geometry
*/
components: null,
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null value means the
* component types are not restricted.
*/
componentTypes: null,
/**
* Constructor: OpenLayers.Geometry.Collection
* Creates a Geometry Collection -- a list of geoms.
*
* Parameters:
* components - {Array(<OpenLayers.Geometry>)} Optional array of geometries
*
*/
initialize: function (components) {
OpenLayers.Geometry.prototype.initialize.apply(this, arguments);
this.components = [];
if (components != null) {
this.addComponents(components);
}
},
/**
* APIMethod: destroy
* Destroy this geometry.
*/
destroy: function () {
this.components.length = 0;
this.components = null;
OpenLayers.Geometry.prototype.destroy.apply(this, arguments);
},
/**
* APIMethod: clone
* Clone this geometry.
*
* Returns:
* {<OpenLayers.Geometry.Collection>} An exact clone of this collection
*/
clone: function() {
var geometry = eval("new " + this.CLASS_NAME + "()");
for(var i=0, len=this.components.length; i<len; i++) {
geometry.addComponent(this.components[i].clone());
}
// catch any randomly tagged-on properties
OpenLayers.Util.applyDefaults(geometry, this);
return geometry;
},
/**
* Method: getComponentsString
* Get a string representing the components for this collection
*
* Returns:
* {String} A string representation of the components of this geometry
*/
getComponentsString: function(){
var strings = [];
for(var i=0, len=this.components.length; i<len; i++) {
strings.push(this.components[i].toShortString());
}
return strings.join(",");
},
/**
* APIMethod: calculateBounds
* Recalculate the bounds by iterating through the components and
* calling calling extendBounds() on each item.
*/
calculateBounds: function() {
this.bounds = null;
var bounds = new OpenLayers.Bounds();
var components = this.components;
if (components) {
for (var i=0, len=components.length; i<len; i++) {
bounds.extend(components[i].getBounds());
}
}
// to preserve old behavior, we only set bounds if non-null
// in the future, we could add bounds.isEmpty()
if (bounds.left != null && bounds.bottom != null &&
bounds.right != null && bounds.top != null) {
this.setBounds(bounds);
}
},
/**
* APIMethod: addComponents
* Add components to this geometry.
*
* Parameters:
* components - {Array(<OpenLayers.Geometry>)} An array of geometries to add
*/
addComponents: function(components){
if(!(OpenLayers.Util.isArray(components))) {
components = [components];
}
for(var i=0, len=components.length; i<len; i++) {
this.addComponent(components[i]);
}
},
/**
* Method: addComponent
* Add a new component (geometry) to the collection. If this.componentTypes
* is set, then the component class name must be in the componentTypes array.
*
* The bounds cache is reset.
*
* Parameters:
* component - {<OpenLayers.Geometry>} A geometry to add
* index - {int} Optional index into the array to insert the component
*
* Returns:
* {Boolean} The component geometry was successfully added
*/
addComponent: function(component, index) {
var added = false;
if(component) {
if(this.componentTypes == null ||
(OpenLayers.Util.indexOf(this.componentTypes,
component.CLASS_NAME) > -1)) {
if(index != null && (index < this.components.length)) {
var components1 = this.components.slice(0, index);
var components2 = this.components.slice(index,
this.components.length);
components1.push(component);
this.components = components1.concat(components2);
} else {
this.components.push(component);
}
component.parent = this;
this.clearBounds();
added = true;
}
}
return added;
},
/**
* APIMethod: removeComponents
* Remove components from this geometry.
*
* Parameters:
* components - {Array(<OpenLayers.Geometry>)} The components to be removed
*
* Returns:
* {Boolean} A component was removed.
*/
removeComponents: function(components) {
var removed = false;
if(!(OpenLayers.Util.isArray(components))) {
components = [components];
}
for(var i=components.length-1; i>=0; --i) {
removed = this.removeComponent(components[i]) || removed;
}
return removed;
},
/**
* Method: removeComponent
* Remove a component from this geometry.
*
* Parameters:
* component - {<OpenLayers.Geometry>}
*
* Returns:
* {Boolean} The component was removed.
*/
removeComponent: function(component) {
OpenLayers.Util.removeItem(this.components, component);
// clearBounds() so that it gets recalculated on the next call
// to this.getBounds();
this.clearBounds();
return true;
},
/**
* APIMethod: getLength
* Calculate the length of this geometry
*
* Returns:
* {Float} The length of the geometry
*/
getLength: function() {
var length = 0.0;
for (var i=0, len=this.components.length; i<len; i++) {
length += this.components[i].getLength();
}
return length;
},
/**
* APIMethod: getArea
* Calculate the area of this geometry. Note how this function is overridden
* in <OpenLayers.Geometry.Polygon>.
*
* Returns:
* {Float} The area of the collection by summing its parts
*/
getArea: function() {
var area = 0.0;
for (var i=0, len=this.components.length; i<len; i++) {
area += this.components[i].getArea();
}
return area;
},
/**
* APIMethod: getGeodesicArea
* Calculate the approximate area of the polygon were it projected onto
* the earth.
*
* Parameters:
* projection - {<OpenLayers.Projection>} The spatial reference system
* for the geometry coordinates. If not provided, Geographic/WGS84 is
* assumed.
*
* Reference:
* Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
* Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
* Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
*
* Returns:
* {float} The approximate geodesic area of the geometry in square meters.
*/
getGeodesicArea: function(projection) {
var area = 0.0;
for(var i=0, len=this.components.length; i<len; i++) {
area += this.components[i].getGeodesicArea(projection);
}
return area;
},
/**
* APIMethod: getCentroid
*
* Compute the centroid for this geometry collection.
*
* Parameters:
* weighted - {Boolean} Perform the getCentroid computation recursively,
* returning an area weighted average of all geometries in this collection.
*
* Returns:
* {<OpenLayers.Geometry.Point>} The centroid of the collection
*/
getCentroid: function(weighted) {
if (!weighted) {
return this.components.length && this.components[0].getCentroid();
}
var len = this.components.length;
if (!len) {
return false;
}
var areas = [];
var centroids = [];
var areaSum = 0;
var minArea = Number.MAX_VALUE;
var component;
for (var i=0; i<len; ++i) {
component = this.components[i];
var area = component.getArea();
var centroid = component.getCentroid(true);
if (isNaN(area) || isNaN(centroid.x) || isNaN(centroid.y)) {
continue;
}
areas.push(area);
areaSum += area;
minArea = (area < minArea && area > 0) ? area : minArea;
centroids.push(centroid);
}
len = areas.length;
if (areaSum === 0) {
// all the components in this collection have 0 area
// probably a collection of points -- weight all the points the same
for (var i=0; i<len; ++i) {
areas[i] = 1;
}
areaSum = areas.length;
} else {
// normalize all the areas where the smallest area will get
// a value of 1
for (var i=0; i<len; ++i) {
areas[i] /= minArea;
}
areaSum /= minArea;
}
var xSum = 0, ySum = 0, centroid, area;
for (var i=0; i<len; ++i) {
centroid = centroids[i];
area = areas[i];
xSum += centroid.x * area;
ySum += centroid.y * area;
}
return new OpenLayers.Geometry.Point(xSum/areaSum, ySum/areaSum);
},
/**
* APIMethod: getGeodesicLength
* Calculate the approximate length of the geometry were it projected onto
* the earth.
*
* projection - {<OpenLayers.Projection>} The spatial reference system
* for the geometry coordinates. If not provided, Geographic/WGS84 is
* assumed.
*
* Returns:
* {Float} The appoximate geodesic length of the geometry in meters.
*/
getGeodesicLength: function(projection) {
var length = 0.0;
for(var i=0, len=this.components.length; i<len; i++) {
length += this.components[i].getGeodesicLength(projection);
}
return length;
},
/**
* APIMethod: move
* Moves a geometry by the given displacement along positive x and y axes.
* This modifies the position of the geometry and clears the cached
* bounds.
*
* Parameters:
* x - {Float} Distance to move geometry in positive x direction.
* y - {Float} Distance to move geometry in positive y direction.
*/
move: function(x, y) {
for(var i=0, len=this.components.length; i<len; i++) {
this.components[i].move(x, y);
}
},
/**
* APIMethod: rotate
* Rotate a geometry around some origin
*
* Parameters:
* angle - {Float} Rotation angle in degrees (measured counterclockwise
* from the positive x-axis)
* origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
*/
rotate: function(angle, origin) {
for(var i=0, len=this.components.length; i<len; ++i) {
this.components[i].rotate(angle, origin);
}
},
/**
* APIMethod: resize
* Resize a geometry relative to some origin. Use this method to apply
* a uniform scaling to a geometry.
*
* Parameters:
* scale - {Float} Factor by which to scale the geometry. A scale of 2
* doubles the size of the geometry in each dimension
* (lines, for example, will be twice as long, and polygons
* will have four times the area).
* origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
* ratio - {Float} Optional x:y ratio for resizing. Default ratio is 1.
*
* Returns:
* {<OpenLayers.Geometry>} - The current geometry.
*/
resize: function(scale, origin, ratio) {
for(var i=0; i<this.components.length; ++i) {
this.components[i].resize(scale, origin, ratio);
}
return this;
},
/**
* APIMethod: distanceTo
* Calculate the closest distance between two geometries (on the x-y plane).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Optional properties for configuring the distance
* calculation.
*
* Valid options:
* details - {Boolean} Return details from the distance calculation.
* Default is false.
* edge - {Boolean} Calculate the distance from this geometry to the
* nearest edge of the target geometry. Default is true. If true,
* calling distanceTo from a geometry that is wholly contained within
* the target will result in a non-zero distance. If false, whenever
* geometries intersect, calling distanceTo will return 0. If false,
* details cannot be returned.
*
* Returns:
* {Number | Object} The distance between this geometry and the target.
* If details is true, the return will be an object with distance,
* x0, y0, x1, and y1 properties. The x0 and y0 properties represent
* the coordinates of the closest point on this geometry. The x1 and y1
* properties represent the coordinates of the closest point on the
* target geometry.
*/
distanceTo: function(geometry, options) {
var edge = !(options && options.edge === false);
var details = edge && options && options.details;
var result, best, distance;
var min = Number.POSITIVE_INFINITY;
for(var i=0, len=this.components.length; i<len; ++i) {
result = this.components[i].distanceTo(geometry, options);
distance = details ? result.distance : result;
if(distance < min) {
min = distance;
best = result;
if(min == 0) {
break;
}
}
}
return best;
},
/**
* APIMethod: equals
* Determine whether another geometry is equivalent to this one. Geometries
* are considered equivalent if all components have the same coordinates.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The geometry to test.
*
* Returns:
* {Boolean} The supplied geometry is equivalent to this geometry.
*/
equals: function(geometry) {
var equivalent = true;
if(!geometry || !geometry.CLASS_NAME ||
(this.CLASS_NAME != geometry.CLASS_NAME)) {
equivalent = false;
} else if(!(OpenLayers.Util.isArray(geometry.components)) ||
(geometry.components.length != this.components.length)) {
equivalent = false;
} else {
for(var i=0, len=this.components.length; i<len; ++i) {
if(!this.components[i].equals(geometry.components[i])) {
equivalent = false;
break;
}
}
}
return equivalent;
},
/**
* APIMethod: transform
* Reproject the components geometry from source to dest.
*
* Parameters:
* source - {<OpenLayers.Projection>}
* dest - {<OpenLayers.Projection>}
*
* Returns:
* {<OpenLayers.Geometry>}
*/
transform: function(source, dest) {
if (source && dest) {
for (var i=0, len=this.components.length; i<len; i++) {
var component = this.components[i];
component.transform(source, dest);
}
this.bounds = null;
}
return this;
},
/**
* APIMethod: intersects
* Determine if the input geometry intersects this one.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} Any type of geometry.
*
* Returns:
* {Boolean} The input geometry intersects this one.
*/
intersects: function(geometry) {
var intersect = false;
for(var i=0, len=this.components.length; i<len; ++ i) {
intersect = geometry.intersects(this.components[i]);
if(intersect) {
break;
}
}
return intersect;
},
/**
* APIMethod: getVertices
* Return a list of all points in this geometry.
*
* Parameters:
* nodes - {Boolean} For lines, only return vertices that are
* endpoints. If false, for lines, only vertices that are not
* endpoints will be returned. If not provided, all vertices will
* be returned.
*
* Returns:
* {Array} A list of all vertices in the geometry.
*/
getVertices: function(nodes) {
var vertices = [];
for(var i=0, len=this.components.length; i<len; ++i) {
Array.prototype.push.apply(
vertices, this.components[i].getVertices(nodes)
);
}
return vertices;
},
CLASS_NAME: "OpenLayers.Geometry.Collection"
});
/* ======================================================================
OpenLayers/Geometry/Point.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry.js
*/
/**
* Class: OpenLayers.Geometry.Point
* Point geometry class.
*
* Inherits from:
* - <OpenLayers.Geometry>
*/
OpenLayers.Geometry.Point = OpenLayers.Class(OpenLayers.Geometry, {
/**
* APIProperty: x
* {float}
*/
x: null,
/**
* APIProperty: y
* {float}
*/
y: null,
/**
* Constructor: OpenLayers.Geometry.Point
* Construct a point geometry.
*
* Parameters:
* x - {float}
* y - {float}
*
*/
initialize: function(x, y) {
OpenLayers.Geometry.prototype.initialize.apply(this, arguments);
this.x = parseFloat(x);
this.y = parseFloat(y);
},
/**
* APIMethod: clone
*
* Returns:
* {<OpenLayers.Geometry.Point>} An exact clone of this OpenLayers.Geometry.Point
*/
clone: function(obj) {
if (obj == null) {
obj = new OpenLayers.Geometry.Point(this.x, this.y);
}
// catch any randomly tagged-on properties
OpenLayers.Util.applyDefaults(obj, this);
return obj;
},
/**
* Method: calculateBounds
* Create a new Bounds based on the lon/lat
*/
calculateBounds: function () {
this.bounds = new OpenLayers.Bounds(this.x, this.y,
this.x, this.y);
},
/**
* APIMethod: distanceTo
* Calculate the closest distance between two geometries (on the x-y plane).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Optional properties for configuring the distance
* calculation.
*
* Valid options:
* details - {Boolean} Return details from the distance calculation.
* Default is false.
* edge - {Boolean} Calculate the distance from this geometry to the
* nearest edge of the target geometry. Default is true. If true,
* calling distanceTo from a geometry that is wholly contained within
* the target will result in a non-zero distance. If false, whenever
* geometries intersect, calling distanceTo will return 0. If false,
* details cannot be returned.
*
* Returns:
* {Number | Object} The distance between this geometry and the target.
* If details is true, the return will be an object with distance,
* x0, y0, x1, and x2 properties. The x0 and y0 properties represent
* the coordinates of the closest point on this geometry. The x1 and y1
* properties represent the coordinates of the closest point on the
* target geometry.
*/
distanceTo: function(geometry, options) {
var edge = !(options && options.edge === false);
var details = edge && options && options.details;
var distance, x0, y0, x1, y1, result;
if(geometry instanceof OpenLayers.Geometry.Point) {
x0 = this.x;
y0 = this.y;
x1 = geometry.x;
y1 = geometry.y;
distance = Math.sqrt(Math.pow(x0 - x1, 2) + Math.pow(y0 - y1, 2));
result = !details ?
distance : {x0: x0, y0: y0, x1: x1, y1: y1, distance: distance};
} else {
result = geometry.distanceTo(this, options);
if(details) {
// switch coord order since this geom is target
result = {
x0: result.x1, y0: result.y1,
x1: result.x0, y1: result.y0,
distance: result.distance
};
}
}
return result;
},
/**
* APIMethod: equals
* Determine whether another geometry is equivalent to this one. Geometries
* are considered equivalent if all components have the same coordinates.
*
* Parameters:
* geom - {<OpenLayers.Geometry.Point>} The geometry to test.
*
* Returns:
* {Boolean} The supplied geometry is equivalent to this geometry.
*/
equals: function(geom) {
var equals = false;
if (geom != null) {
equals = ((this.x == geom.x && this.y == geom.y) ||
(isNaN(this.x) && isNaN(this.y) && isNaN(geom.x) && isNaN(geom.y)));
}
return equals;
},
/**
* Method: toShortString
*
* Returns:
* {String} Shortened String representation of Point object.
* (ex. <i>"5, 42"</i>)
*/
toShortString: function() {
return (this.x + ", " + this.y);
},
/**
* APIMethod: move
* Moves a geometry by the given displacement along positive x and y axes.
* This modifies the position of the geometry and clears the cached
* bounds.
*
* Parameters:
* x - {Float} Distance to move geometry in positive x direction.
* y - {Float} Distance to move geometry in positive y direction.
*/
move: function(x, y) {
this.x = this.x + x;
this.y = this.y + y;
this.clearBounds();
},
/**
* APIMethod: rotate
* Rotate a point around another.
*
* Parameters:
* angle - {Float} Rotation angle in degrees (measured counterclockwise
* from the positive x-axis)
* origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
*/
rotate: function(angle, origin) {
angle *= Math.PI / 180;
var radius = this.distanceTo(origin);
var theta = angle + Math.atan2(this.y - origin.y, this.x - origin.x);
this.x = origin.x + (radius * Math.cos(theta));
this.y = origin.y + (radius * Math.sin(theta));
this.clearBounds();
},
/**
* APIMethod: getCentroid
*
* Returns:
* {<OpenLayers.Geometry.Point>} The centroid of the collection
*/
getCentroid: function() {
return new OpenLayers.Geometry.Point(this.x, this.y);
},
/**
* APIMethod: resize
* Resize a point relative to some origin. For points, this has the effect
* of scaling a vector (from the origin to the point). This method is
* more useful on geometry collection subclasses.
*
* Parameters:
* scale - {Float} Ratio of the new distance from the origin to the old
* distance from the origin. A scale of 2 doubles the
* distance between the point and origin.
* origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
* ratio - {Float} Optional x:y ratio for resizing. Default ratio is 1.
*
* Returns:
* {<OpenLayers.Geometry>} - The current geometry.
*/
resize: function(scale, origin, ratio) {
ratio = (ratio == undefined) ? 1 : ratio;
this.x = origin.x + (scale * ratio * (this.x - origin.x));
this.y = origin.y + (scale * (this.y - origin.y));
this.clearBounds();
return this;
},
/**
* APIMethod: intersects
* Determine if the input geometry intersects this one.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} Any type of geometry.
*
* Returns:
* {Boolean} The input geometry intersects this one.
*/
intersects: function(geometry) {
var intersect = false;
if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
intersect = this.equals(geometry);
} else {
intersect = geometry.intersects(this);
}
return intersect;
},
/**
* APIMethod: transform
* Translate the x,y properties of the point from source to dest.
*
* Parameters:
* source - {<OpenLayers.Projection>}
* dest - {<OpenLayers.Projection>}
*
* Returns:
* {<OpenLayers.Geometry>}
*/
transform: function(source, dest) {
if ((source && dest)) {
OpenLayers.Projection.transform(
this, source, dest);
this.bounds = null;
}
return this;
},
/**
* APIMethod: getVertices
* Return a list of all points in this geometry.
*
* Parameters:
* nodes - {Boolean} For lines, only return vertices that are
* endpoints. If false, for lines, only vertices that are not
* endpoints will be returned. If not provided, all vertices will
* be returned.
*
* Returns:
* {Array} A list of all vertices in the geometry.
*/
getVertices: function(nodes) {
return [this];
},
CLASS_NAME: "OpenLayers.Geometry.Point"
});
/* ======================================================================
OpenLayers/Geometry/MultiPoint.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/Collection.js
* @requires OpenLayers/Geometry/Point.js
*/
/**
* Class: OpenLayers.Geometry.MultiPoint
* MultiPoint is a collection of Points. Create a new instance with the
* <OpenLayers.Geometry.MultiPoint> constructor.
*
* Inherits from:
* - <OpenLayers.Geometry.Collection>
* - <OpenLayers.Geometry>
*/
OpenLayers.Geometry.MultiPoint = OpenLayers.Class(
OpenLayers.Geometry.Collection, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null value means the
* component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.Point"],
/**
* Constructor: OpenLayers.Geometry.MultiPoint
* Create a new MultiPoint Geometry
*
* Parameters:
* components - {Array(<OpenLayers.Geometry.Point>)}
*
* Returns:
* {<OpenLayers.Geometry.MultiPoint>}
*/
/**
* APIMethod: addPoint
* Wrapper for <OpenLayers.Geometry.Collection.addComponent>
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>} Point to be added
* index - {Integer} Optional index
*/
addPoint: function(point, index) {
this.addComponent(point, index);
},
/**
* APIMethod: removePoint
* Wrapper for <OpenLayers.Geometry.Collection.removeComponent>
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>} Point to be removed
*/
removePoint: function(point){
this.removeComponent(point);
},
CLASS_NAME: "OpenLayers.Geometry.MultiPoint"
});
/* ======================================================================
OpenLayers/Geometry/Curve.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/MultiPoint.js
*/
/**
* Class: OpenLayers.Geometry.Curve
* A Curve is a MultiPoint, whose points are assumed to be connected. To
* this end, we provide a "getLength()" function, which iterates through
* the points, summing the distances between them.
*
* Inherits:
* - <OpenLayers.Geometry.MultiPoint>
*/
OpenLayers.Geometry.Curve = OpenLayers.Class(OpenLayers.Geometry.MultiPoint, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null
* value means the component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.Point"],
/**
* Constructor: OpenLayers.Geometry.Curve
*
* Parameters:
* point - {Array(<OpenLayers.Geometry.Point>)}
*/
/**
* APIMethod: getLength
*
* Returns:
* {Float} The length of the curve
*/
getLength: function() {
var length = 0.0;
if ( this.components && (this.components.length > 1)) {
for(var i=1, len=this.components.length; i<len; i++) {
length += this.components[i-1].distanceTo(this.components[i]);
}
}
return length;
},
/**
* APIMethod: getGeodesicLength
* Calculate the approximate length of the geometry were it projected onto
* the earth.
*
* projection - {<OpenLayers.Projection>} The spatial reference system
* for the geometry coordinates. If not provided, Geographic/WGS84 is
* assumed.
*
* Returns:
* {Float} The appoximate geodesic length of the geometry in meters.
*/
getGeodesicLength: function(projection) {
var geom = this; // so we can work with a clone if needed
if(projection) {
var gg = new OpenLayers.Projection("EPSG:4326");
if(!gg.equals(projection)) {
geom = this.clone().transform(projection, gg);
}
}
var length = 0.0;
if(geom.components && (geom.components.length > 1)) {
var p1, p2;
for(var i=1, len=geom.components.length; i<len; i++) {
p1 = geom.components[i-1];
p2 = geom.components[i];
// this returns km and requires lon/lat properties
length += OpenLayers.Util.distVincenty(
{lon: p1.x, lat: p1.y}, {lon: p2.x, lat: p2.y}
);
}
}
// convert to m
return length * 1000;
},
CLASS_NAME: "OpenLayers.Geometry.Curve"
});
/* ======================================================================
OpenLayers/Geometry/LineString.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/Curve.js
*/
/**
* Class: OpenLayers.Geometry.LineString
* A LineString is a Curve which, once two points have been added to it, can
* never be less than two points long.
*
* Inherits from:
* - <OpenLayers.Geometry.Curve>
*/
OpenLayers.Geometry.LineString = OpenLayers.Class(OpenLayers.Geometry.Curve, {
/**
* Constructor: OpenLayers.Geometry.LineString
* Create a new LineString geometry
*
* Parameters:
* points - {Array(<OpenLayers.Geometry.Point>)} An array of points used to
* generate the linestring
*
*/
/**
* APIMethod: removeComponent
* Only allows removal of a point if there are three or more points in
* the linestring. (otherwise the result would be just a single point)
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>} The point to be removed
*
* Returns:
* {Boolean} The component was removed.
*/
removeComponent: function(point) {
var removed = this.components && (this.components.length > 2);
if (removed) {
OpenLayers.Geometry.Collection.prototype.removeComponent.apply(this,
arguments);
}
return removed;
},
/**
* APIMethod: intersects
* Test for instersection between two geometries. This is a cheapo
* implementation of the Bently-Ottmann algorigithm. It doesn't
* really keep track of a sweep line data structure. It is closer
* to the brute force method, except that segments are sorted and
* potential intersections are only calculated when bounding boxes
* intersect.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {Boolean} The input geometry intersects this geometry.
*/
intersects: function(geometry) {
var intersect = false;
var type = geometry.CLASS_NAME;
if(type == "OpenLayers.Geometry.LineString" ||
type == "OpenLayers.Geometry.LinearRing" ||
type == "OpenLayers.Geometry.Point") {
var segs1 = this.getSortedSegments();
var segs2;
if(type == "OpenLayers.Geometry.Point") {
segs2 = [{
x1: geometry.x, y1: geometry.y,
x2: geometry.x, y2: geometry.y
}];
} else {
segs2 = geometry.getSortedSegments();
}
var seg1, seg1x1, seg1x2, seg1y1, seg1y2,
seg2, seg2y1, seg2y2;
// sweep right
outer: for(var i=0, len=segs1.length; i<len; ++i) {
seg1 = segs1[i];
seg1x1 = seg1.x1;
seg1x2 = seg1.x2;
seg1y1 = seg1.y1;
seg1y2 = seg1.y2;
inner: for(var j=0, jlen=segs2.length; j<jlen; ++j) {
seg2 = segs2[j];
if(seg2.x1 > seg1x2) {
// seg1 still left of seg2
break;
}
if(seg2.x2 < seg1x1) {
// seg2 still left of seg1
continue;
}
seg2y1 = seg2.y1;
seg2y2 = seg2.y2;
if(Math.min(seg2y1, seg2y2) > Math.max(seg1y1, seg1y2)) {
// seg2 above seg1
continue;
}
if(Math.max(seg2y1, seg2y2) < Math.min(seg1y1, seg1y2)) {
// seg2 below seg1
continue;
}
if(OpenLayers.Geometry.segmentsIntersect(seg1, seg2)) {
intersect = true;
break outer;
}
}
}
} else {
intersect = geometry.intersects(this);
}
return intersect;
},
/**
* Method: getSortedSegments
*
* Returns:
* {Array} An array of segment objects. Segment objects have properties
* x1, y1, x2, and y2. The start point is represented by x1 and y1.
* The end point is represented by x2 and y2. Start and end are
* ordered so that x1 < x2.
*/
getSortedSegments: function() {
var numSeg = this.components.length - 1;
var segments = new Array(numSeg), point1, point2;
for(var i=0; i<numSeg; ++i) {
point1 = this.components[i];
point2 = this.components[i + 1];
if(point1.x < point2.x) {
segments[i] = {
x1: point1.x,
y1: point1.y,
x2: point2.x,
y2: point2.y
};
} else {
segments[i] = {
x1: point2.x,
y1: point2.y,
x2: point1.x,
y2: point1.y
};
}
}
// more efficient to define this somewhere static
function byX1(seg1, seg2) {
return seg1.x1 - seg2.x1;
}
return segments.sort(byX1);
},
/**
* Method: splitWithSegment
* Split this geometry with the given segment.
*
* Parameters:
* seg - {Object} An object with x1, y1, x2, and y2 properties referencing
* segment endpoint coordinates.
* options - {Object} Properties of this object will be used to determine
* how the split is conducted.
*
* Valid options:
* edge - {Boolean} Allow splitting when only edges intersect. Default is
* true. If false, a vertex on the source segment must be within the
* tolerance distance of the intersection to be considered a split.
* tolerance - {Number} If a non-null value is provided, intersections
* within the tolerance distance of one of the source segment's
* endpoints will be assumed to occur at the endpoint.
*
* Returns:
* {Object} An object with *lines* and *points* properties. If the given
* segment intersects this linestring, the lines array will reference
* geometries that result from the split. The points array will contain
* all intersection points. Intersection points are sorted along the
* segment (in order from x1,y1 to x2,y2).
*/
splitWithSegment: function(seg, options) {
var edge = !(options && options.edge === false);
var tolerance = options && options.tolerance;
var lines = [];
var verts = this.getVertices();
var points = [];
var intersections = [];
var split = false;
var vert1, vert2, point;
var node, vertex, target;
var interOptions = {point: true, tolerance: tolerance};
var result = null;
for(var i=0, stop=verts.length-2; i<=stop; ++i) {
vert1 = verts[i];
points.push(vert1.clone());
vert2 = verts[i+1];
target = {x1: vert1.x, y1: vert1.y, x2: vert2.x, y2: vert2.y};
point = OpenLayers.Geometry.segmentsIntersect(
seg, target, interOptions
);
if(point instanceof OpenLayers.Geometry.Point) {
if((point.x === seg.x1 && point.y === seg.y1) ||
(point.x === seg.x2 && point.y === seg.y2) ||
point.equals(vert1) || point.equals(vert2)) {
vertex = true;
} else {
vertex = false;
}
if(vertex || edge) {
// push intersections different than the previous
if(!point.equals(intersections[intersections.length-1])) {
intersections.push(point.clone());
}
if(i === 0) {
if(point.equals(vert1)) {
continue;
}
}
if(point.equals(vert2)) {
continue;
}
split = true;
if(!point.equals(vert1)) {
points.push(point);
}
lines.push(new OpenLayers.Geometry.LineString(points));
points = [point.clone()];
}
}
}
if(split) {
points.push(vert2.clone());
lines.push(new OpenLayers.Geometry.LineString(points));
}
if(intersections.length > 0) {
// sort intersections along segment
var xDir = seg.x1 < seg.x2 ? 1 : -1;
var yDir = seg.y1 < seg.y2 ? 1 : -1;
result = {
lines: lines,
points: intersections.sort(function(p1, p2) {
return (xDir * p1.x - xDir * p2.x) || (yDir * p1.y - yDir * p2.y);
})
};
}
return result;
},
/**
* Method: split
* Use this geometry (the source) to attempt to split a target geometry.
*
* Parameters:
* target - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Properties of this object will be used to determine
* how the split is conducted.
*
* Valid options:
* mutual - {Boolean} Split the source geometry in addition to the target
* geometry. Default is false.
* edge - {Boolean} Allow splitting when only edges intersect. Default is
* true. If false, a vertex on the source must be within the tolerance
* distance of the intersection to be considered a split.
* tolerance - {Number} If a non-null value is provided, intersections
* within the tolerance distance of an existing vertex on the source
* will be assumed to occur at the vertex.
*
* Returns:
* {Array} A list of geometries (of this same type as the target) that
* result from splitting the target with the source geometry. The
* source and target geometry will remain unmodified. If no split
* results, null will be returned. If mutual is true and a split
* results, return will be an array of two arrays - the first will be
* all geometries that result from splitting the source geometry and
* the second will be all geometries that result from splitting the
* target geometry.
*/
split: function(target, options) {
var results = null;
var mutual = options && options.mutual;
var sourceSplit, targetSplit, sourceParts, targetParts;
if(target instanceof OpenLayers.Geometry.LineString) {
var verts = this.getVertices();
var vert1, vert2, seg, splits, lines, point;
var points = [];
sourceParts = [];
for(var i=0, stop=verts.length-2; i<=stop; ++i) {
vert1 = verts[i];
vert2 = verts[i+1];
seg = {
x1: vert1.x, y1: vert1.y,
x2: vert2.x, y2: vert2.y
};
targetParts = targetParts || [target];
if(mutual) {
points.push(vert1.clone());
}
for(var j=0; j<targetParts.length; ++j) {
splits = targetParts[j].splitWithSegment(seg, options);
if(splits) {
// splice in new features
lines = splits.lines;
if(lines.length > 0) {
lines.unshift(j, 1);
Array.prototype.splice.apply(targetParts, lines);
j += lines.length - 2;
}
if(mutual) {
for(var k=0, len=splits.points.length; k<len; ++k) {
point = splits.points[k];
if(!point.equals(vert1)) {
points.push(point);
sourceParts.push(new OpenLayers.Geometry.LineString(points));
if(point.equals(vert2)) {
points = [];
} else {
points = [point.clone()];
}
}
}
}
}
}
}
if(mutual && sourceParts.length > 0 && points.length > 0) {
points.push(vert2.clone());
sourceParts.push(new OpenLayers.Geometry.LineString(points));
}
} else {
results = target.splitWith(this, options);
}
if(targetParts && targetParts.length > 1) {
targetSplit = true;
} else {
targetParts = [];
}
if(sourceParts && sourceParts.length > 1) {
sourceSplit = true;
} else {
sourceParts = [];
}
if(targetSplit || sourceSplit) {
if(mutual) {
results = [sourceParts, targetParts];
} else {
results = targetParts;
}
}
return results;
},
/**
* Method: splitWith
* Split this geometry (the target) with the given geometry (the source).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} A geometry used to split this
* geometry (the source).
* options - {Object} Properties of this object will be used to determine
* how the split is conducted.
*
* Valid options:
* mutual - {Boolean} Split the source geometry in addition to the target
* geometry. Default is false.
* edge - {Boolean} Allow splitting when only edges intersect. Default is
* true. If false, a vertex on the source must be within the tolerance
* distance of the intersection to be considered a split.
* tolerance - {Number} If a non-null value is provided, intersections
* within the tolerance distance of an existing vertex on the source
* will be assumed to occur at the vertex.
*
* Returns:
* {Array} A list of geometries (of this same type as the target) that
* result from splitting the target with the source geometry. The
* source and target geometry will remain unmodified. If no split
* results, null will be returned. If mutual is true and a split
* results, return will be an array of two arrays - the first will be
* all geometries that result from splitting the source geometry and
* the second will be all geometries that result from splitting the
* target geometry.
*/
splitWith: function(geometry, options) {
return geometry.split(this, options);
},
/**
* APIMethod: getVertices
* Return a list of all points in this geometry.
*
* Parameters:
* nodes - {Boolean} For lines, only return vertices that are
* endpoints. If false, for lines, only vertices that are not
* endpoints will be returned. If not provided, all vertices will
* be returned.
*
* Returns:
* {Array} A list of all vertices in the geometry.
*/
getVertices: function(nodes) {
var vertices;
if(nodes === true) {
vertices = [
this.components[0],
this.components[this.components.length-1]
];
} else if (nodes === false) {
vertices = this.components.slice(1, this.components.length-1);
} else {
vertices = this.components.slice();
}
return vertices;
},
/**
* APIMethod: distanceTo
* Calculate the closest distance between two geometries (on the x-y plane).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Optional properties for configuring the distance
* calculation.
*
* Valid options:
* details - {Boolean} Return details from the distance calculation.
* Default is false.
* edge - {Boolean} Calculate the distance from this geometry to the
* nearest edge of the target geometry. Default is true. If true,
* calling distanceTo from a geometry that is wholly contained within
* the target will result in a non-zero distance. If false, whenever
* geometries intersect, calling distanceTo will return 0. If false,
* details cannot be returned.
*
* Returns:
* {Number | Object} The distance between this geometry and the target.
* If details is true, the return will be an object with distance,
* x0, y0, x1, and x2 properties. The x0 and y0 properties represent
* the coordinates of the closest point on this geometry. The x1 and y1
* properties represent the coordinates of the closest point on the
* target geometry.
*/
distanceTo: function(geometry, options) {
var edge = !(options && options.edge === false);
var details = edge && options && options.details;
var result, best = {};
var min = Number.POSITIVE_INFINITY;
if(geometry instanceof OpenLayers.Geometry.Point) {
var segs = this.getSortedSegments();
var x = geometry.x;
var y = geometry.y;
var seg;
for(var i=0, len=segs.length; i<len; ++i) {
seg = segs[i];
result = OpenLayers.Geometry.distanceToSegment(geometry, seg);
if(result.distance < min) {
min = result.distance;
best = result;
if(min === 0) {
break;
}
} else {
// if distance increases and we cross y0 to the right of x0, no need to keep looking.
if(seg.x2 > x && ((y > seg.y1 && y < seg.y2) || (y < seg.y1 && y > seg.y2))) {
break;
}
}
}
if(details) {
best = {
distance: best.distance,
x0: best.x, y0: best.y,
x1: x, y1: y
};
} else {
best = best.distance;
}
} else if(geometry instanceof OpenLayers.Geometry.LineString) {
var segs0 = this.getSortedSegments();
var segs1 = geometry.getSortedSegments();
var seg0, seg1, intersection, x0, y0;
var len1 = segs1.length;
var interOptions = {point: true};
outer: for(var i=0, len=segs0.length; i<len; ++i) {
seg0 = segs0[i];
x0 = seg0.x1;
y0 = seg0.y1;
for(var j=0; j<len1; ++j) {
seg1 = segs1[j];
intersection = OpenLayers.Geometry.segmentsIntersect(seg0, seg1, interOptions);
if(intersection) {
min = 0;
best = {
distance: 0,
x0: intersection.x, y0: intersection.y,
x1: intersection.x, y1: intersection.y
};
break outer;
} else {
result = OpenLayers.Geometry.distanceToSegment({x: x0, y: y0}, seg1);
if(result.distance < min) {
min = result.distance;
best = {
distance: min,
x0: x0, y0: y0,
x1: result.x, y1: result.y
};
}
}
}
}
if(!details) {
best = best.distance;
}
if(min !== 0) {
// check the final vertex in this line's sorted segments
if(seg0) {
result = geometry.distanceTo(
new OpenLayers.Geometry.Point(seg0.x2, seg0.y2),
options
);
var dist = details ? result.distance : result;
if(dist < min) {
if(details) {
best = {
distance: min,
x0: result.x1, y0: result.y1,
x1: result.x0, y1: result.y0
};
} else {
best = dist;
}
}
}
}
} else {
best = geometry.distanceTo(this, options);
// swap since target comes from this line
if(details) {
best = {
distance: best.distance,
x0: best.x1, y0: best.y1,
x1: best.x0, y1: best.y0
};
}
}
return best;
},
/**
* APIMethod: simplify
* This function will return a simplified LineString.
* Simplification is based on the Douglas-Peucker algorithm.
*
*
* Parameters:
* tolerance - {number} threshhold for simplification in map units
*
* Returns:
* {OpenLayers.Geometry.LineString} the simplified LineString
*/
simplify: function(tolerance){
if (this && this !== null) {
var points = this.getVertices();
if (points.length < 3) {
return this;
}
var compareNumbers = function(a, b){
return (a-b);
};
/**
* Private function doing the Douglas-Peucker reduction
*/
var douglasPeuckerReduction = function(points, firstPoint, lastPoint, tolerance){
var maxDistance = 0;
var indexFarthest = 0;
for (var index = firstPoint, distance; index < lastPoint; index++) {
distance = perpendicularDistance(points[firstPoint], points[lastPoint], points[index]);
if (distance > maxDistance) {
maxDistance = distance;
indexFarthest = index;
}
}
if (maxDistance > tolerance && indexFarthest != firstPoint) {
//Add the largest point that exceeds the tolerance
pointIndexsToKeep.push(indexFarthest);
douglasPeuckerReduction(points, firstPoint, indexFarthest, tolerance);
douglasPeuckerReduction(points, indexFarthest, lastPoint, tolerance);
}
};
/**
* Private function calculating the perpendicular distance
* TODO: check whether OpenLayers.Geometry.LineString::distanceTo() is faster or slower
*/
var perpendicularDistance = function(point1, point2, point){
//Area = |(1/2)(x1y2 + x2y3 + x3y1 - x2y1 - x3y2 - x1y3)| *Area of triangle
//Base = v((x1-x2)²+(x1-x2)²) *Base of Triangle*
//Area = .5*Base*H *Solve for height
//Height = Area/.5/Base
var area = Math.abs(0.5 * (point1.x * point2.y + point2.x * point.y + point.x * point1.y - point2.x * point1.y - point.x * point2.y - point1.x * point.y));
var bottom = Math.sqrt(Math.pow(point1.x - point2.x, 2) + Math.pow(point1.y - point2.y, 2));
var height = area / bottom * 2;
return height;
};
var firstPoint = 0;
var lastPoint = points.length - 1;
var pointIndexsToKeep = [];
//Add the first and last index to the keepers
pointIndexsToKeep.push(firstPoint);
pointIndexsToKeep.push(lastPoint);
//The first and the last point cannot be the same
while (points[firstPoint].equals(points[lastPoint])) {
lastPoint--;
//Addition: the first point not equal to first point in the LineString is kept as well
pointIndexsToKeep.push(lastPoint);
}
douglasPeuckerReduction(points, firstPoint, lastPoint, tolerance);
var returnPoints = [];
pointIndexsToKeep.sort(compareNumbers);
for (var index = 0; index < pointIndexsToKeep.length; index++) {
returnPoints.push(points[pointIndexsToKeep[index]]);
}
return new OpenLayers.Geometry.LineString(returnPoints);
}
else {
return this;
}
},
CLASS_NAME: "OpenLayers.Geometry.LineString"
});
/* ======================================================================
OpenLayers/Geometry/LinearRing.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/LineString.js
*/
/**
* Class: OpenLayers.Geometry.LinearRing
*
* A Linear Ring is a special LineString which is closed. It closes itself
* automatically on every addPoint/removePoint by adding a copy of the first
* point as the last point.
*
* Also, as it is the first in the line family to close itself, a getArea()
* function is defined to calculate the enclosed area of the linearRing
*
* Inherits:
* - <OpenLayers.Geometry.LineString>
*/
OpenLayers.Geometry.LinearRing = OpenLayers.Class(
OpenLayers.Geometry.LineString, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null
* value means the component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.Point"],
/**
* Constructor: OpenLayers.Geometry.LinearRing
* Linear rings are constructed with an array of points. This array
* can represent a closed or open ring. If the ring is open (the last
* point does not equal the first point), the constructor will close
* the ring. If the ring is already closed (the last point does equal
* the first point), it will be left closed.
*
* Parameters:
* points - {Array(<OpenLayers.Geometry.Point>)} points
*/
/**
* APIMethod: addComponent
* Adds a point to geometry components. If the point is to be added to
* the end of the components array and it is the same as the last point
* already in that array, the duplicate point is not added. This has
* the effect of closing the ring if it is not already closed, and
* doing the right thing if it is already closed. This behavior can
* be overridden by calling the method with a non-null index as the
* second argument.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
* index - {Integer} Index into the array to insert the component
*
* Returns:
* {Boolean} Was the Point successfully added?
*/
addComponent: function(point, index) {
var added = false;
//remove last point
var lastPoint = this.components.pop();
// given an index, add the point
// without an index only add non-duplicate points
if(index != null || !point.equals(lastPoint)) {
added = OpenLayers.Geometry.Collection.prototype.addComponent.apply(this,
arguments);
}
//append copy of first point
var firstPoint = this.components[0];
OpenLayers.Geometry.Collection.prototype.addComponent.apply(this,
[firstPoint]);
return added;
},
/**
* APIMethod: removeComponent
* Removes a point from geometry components.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns:
* {Boolean} The component was removed.
*/
removeComponent: function(point) {
var removed = this.components && (this.components.length > 3);
if (removed) {
//remove last point
this.components.pop();
//remove our point
OpenLayers.Geometry.Collection.prototype.removeComponent.apply(this,
arguments);
//append copy of first point
var firstPoint = this.components[0];
OpenLayers.Geometry.Collection.prototype.addComponent.apply(this,
[firstPoint]);
}
return removed;
},
/**
* APIMethod: move
* Moves a geometry by the given displacement along positive x and y axes.
* This modifies the position of the geometry and clears the cached
* bounds.
*
* Parameters:
* x - {Float} Distance to move geometry in positive x direction.
* y - {Float} Distance to move geometry in positive y direction.
*/
move: function(x, y) {
for(var i = 0, len=this.components.length; i<len - 1; i++) {
this.components[i].move(x, y);
}
},
/**
* APIMethod: rotate
* Rotate a geometry around some origin
*
* Parameters:
* angle - {Float} Rotation angle in degrees (measured counterclockwise
* from the positive x-axis)
* origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
*/
rotate: function(angle, origin) {
for(var i=0, len=this.components.length; i<len - 1; ++i) {
this.components[i].rotate(angle, origin);
}
},
/**
* APIMethod: resize
* Resize a geometry relative to some origin. Use this method to apply
* a uniform scaling to a geometry.
*
* Parameters:
* scale - {Float} Factor by which to scale the geometry. A scale of 2
* doubles the size of the geometry in each dimension
* (lines, for example, will be twice as long, and polygons
* will have four times the area).
* origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
* ratio - {Float} Optional x:y ratio for resizing. Default ratio is 1.
*
* Returns:
* {<OpenLayers.Geometry>} - The current geometry.
*/
resize: function(scale, origin, ratio) {
for(var i=0, len=this.components.length; i<len - 1; ++i) {
this.components[i].resize(scale, origin, ratio);
}
return this;
},
/**
* APIMethod: transform
* Reproject the components geometry from source to dest.
*
* Parameters:
* source - {<OpenLayers.Projection>}
* dest - {<OpenLayers.Projection>}
*
* Returns:
* {<OpenLayers.Geometry>}
*/
transform: function(source, dest) {
if (source && dest) {
for (var i=0, len=this.components.length; i<len - 1; i++) {
var component = this.components[i];
component.transform(source, dest);
}
this.bounds = null;
}
return this;
},
/**
* APIMethod: getCentroid
*
* Returns:
* {<OpenLayers.Geometry.Point>} The centroid of the collection
*/
getCentroid: function() {
if (this.components) {
var len = this.components.length;
if (len > 0 && len <= 2) {
return this.components[0].clone();
} else if (len > 2) {
var sumX = 0.0;
var sumY = 0.0;
var x0 = this.components[0].x;
var y0 = this.components[0].y;
var area = -1 * this.getArea();
if (area != 0) {
for (var i = 0; i < len - 1; i++) {
var b = this.components[i];
var c = this.components[i+1];
sumX += (b.x + c.x - 2 * x0) * ((b.x - x0) * (c.y - y0) - (c.x - x0) * (b.y - y0));
sumY += (b.y + c.y - 2 * y0) * ((b.x - x0) * (c.y - y0) - (c.x - x0) * (b.y - y0));
}
var x = x0 + sumX / (6 * area);
var y = y0 + sumY / (6 * area);
} else {
for (var i = 0; i < len - 1; i++) {
sumX += this.components[i].x;
sumY += this.components[i].y;
}
var x = sumX / (len - 1);
var y = sumY / (len - 1);
}
return new OpenLayers.Geometry.Point(x, y);
} else {
return null;
}
}
},
/**
* APIMethod: getArea
* Note - The area is positive if the ring is oriented CW, otherwise
* it will be negative.
*
* Returns:
* {Float} The signed area for a ring.
*/
getArea: function() {
var area = 0.0;
if ( this.components && (this.components.length > 2)) {
var sum = 0.0;
for (var i=0, len=this.components.length; i<len - 1; i++) {
var b = this.components[i];
var c = this.components[i+1];
sum += (b.x + c.x) * (c.y - b.y);
}
area = - sum / 2.0;
}
return area;
},
/**
* APIMethod: getGeodesicArea
* Calculate the approximate area of the polygon were it projected onto
* the earth. Note that this area will be positive if ring is oriented
* clockwise, otherwise it will be negative.
*
* Parameters:
* projection - {<OpenLayers.Projection>} The spatial reference system
* for the geometry coordinates. If not provided, Geographic/WGS84 is
* assumed.
*
* Reference:
* Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
* Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
* Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
*
* Returns:
* {float} The approximate signed geodesic area of the polygon in square
* meters.
*/
getGeodesicArea: function(projection) {
var ring = this; // so we can work with a clone if needed
if(projection) {
var gg = new OpenLayers.Projection("EPSG:4326");
if(!gg.equals(projection)) {
ring = this.clone().transform(projection, gg);
}
}
var area = 0.0;
var len = ring.components && ring.components.length;
if(len > 2) {
var p1, p2;
for(var i=0; i<len-1; i++) {
p1 = ring.components[i];
p2 = ring.components[i+1];
area += OpenLayers.Util.rad(p2.x - p1.x) *
(2 + Math.sin(OpenLayers.Util.rad(p1.y)) +
Math.sin(OpenLayers.Util.rad(p2.y)));
}
area = area * 6378137.0 * 6378137.0 / 2.0;
}
return area;
},
/**
* Method: containsPoint
* Test if a point is inside a linear ring. For the case where a point
* is coincident with a linear ring edge, returns 1. Otherwise,
* returns boolean.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns:
* {Boolean | Number} The point is inside the linear ring. Returns 1 if
* the point is coincident with an edge. Returns boolean otherwise.
*/
containsPoint: function(point) {
var approx = OpenLayers.Number.limitSigDigs;
var digs = 14;
var px = approx(point.x, digs);
var py = approx(point.y, digs);
function getX(y, x1, y1, x2, y2) {
return (y - y2) * ((x2 - x1) / (y2 - y1)) + x2;
}
var numSeg = this.components.length - 1;
var start, end, x1, y1, x2, y2, cx, cy;
var crosses = 0;
for(var i=0; i<numSeg; ++i) {
start = this.components[i];
x1 = approx(start.x, digs);
y1 = approx(start.y, digs);
end = this.components[i + 1];
x2 = approx(end.x, digs);
y2 = approx(end.y, digs);
/**
* The following conditions enforce five edge-crossing rules:
* 1. points coincident with edges are considered contained;
* 2. an upward edge includes its starting endpoint, and
* excludes its final endpoint;
* 3. a downward edge excludes its starting endpoint, and
* includes its final endpoint;
* 4. horizontal edges are excluded; and
* 5. the edge-ray intersection point must be strictly right
* of the point P.
*/
if(y1 == y2) {
// horizontal edge
if(py == y1) {
// point on horizontal line
if(x1 <= x2 && (px >= x1 && px <= x2) || // right or vert
x1 >= x2 && (px <= x1 && px >= x2)) { // left or vert
// point on edge
crosses = -1;
break;
}
}
// ignore other horizontal edges
continue;
}
cx = approx(getX(py, x1, y1, x2, y2), digs);
if(cx == px) {
// point on line
if(y1 < y2 && (py >= y1 && py <= y2) || // upward
y1 > y2 && (py <= y1 && py >= y2)) { // downward
// point on edge
crosses = -1;
break;
}
}
if(cx <= px) {
// no crossing to the right
continue;
}
if(x1 != x2 && (cx < Math.min(x1, x2) || cx > Math.max(x1, x2))) {
// no crossing
continue;
}
if(y1 < y2 && (py >= y1 && py < y2) || // upward
y1 > y2 && (py < y1 && py >= y2)) { // downward
++crosses;
}
}
var contained = (crosses == -1) ?
// on edge
1 :
// even (out) or odd (in)
!!(crosses & 1);
return contained;
},
/**
* APIMethod: intersects
* Determine if the input geometry intersects this one.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} Any type of geometry.
*
* Returns:
* {Boolean} The input geometry intersects this one.
*/
intersects: function(geometry) {
var intersect = false;
if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
intersect = this.containsPoint(geometry);
} else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LineString") {
intersect = geometry.intersects(this);
} else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
intersect = OpenLayers.Geometry.LineString.prototype.intersects.apply(
this, [geometry]
);
} else {
// check for component intersections
for(var i=0, len=geometry.components.length; i<len; ++ i) {
intersect = geometry.components[i].intersects(this);
if(intersect) {
break;
}
}
}
return intersect;
},
/**
* APIMethod: getVertices
* Return a list of all points in this geometry.
*
* Parameters:
* nodes - {Boolean} For lines, only return vertices that are
* endpoints. If false, for lines, only vertices that are not
* endpoints will be returned. If not provided, all vertices will
* be returned.
*
* Returns:
* {Array} A list of all vertices in the geometry.
*/
getVertices: function(nodes) {
return (nodes === true) ? [] : this.components.slice(0, this.components.length-1);
},
CLASS_NAME: "OpenLayers.Geometry.LinearRing"
});
/* ======================================================================
OpenLayers/Util/vendorPrefix.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/SingleFile.js
*/
OpenLayers.Util = OpenLayers.Util || {};
/**
* Namespace: OpenLayers.Util.vendorPrefix
* A collection of utility functions to detect vendor prefixed features
*/
OpenLayers.Util.vendorPrefix = (function() {
"use strict";
var VENDOR_PREFIXES = ["", "O", "ms", "Moz", "Webkit"],
divStyle = document.createElement("div").style,
cssCache = {},
jsCache = {};
/**
* Function: domToCss
* Converts a upper camel case DOM style property name to a CSS property
* i.e. transformOrigin -> transform-origin
* or WebkitTransformOrigin -> -webkit-transform-origin
*
* Parameters:
* prefixedDom - {String} The property to convert
*
* Returns:
* {String} The CSS property
*/
function domToCss(prefixedDom) {
if (!prefixedDom) { return null; }
return prefixedDom.
replace(/([A-Z])/g, function(c) { return "-" + c.toLowerCase(); }).
replace(/^ms-/, "-ms-");
}
/**
* APIMethod: css
* Detect which property is used for a CSS property
*
* Parameters:
* property - {String} The standard (unprefixed) CSS property name
*
* Returns:
* {String} The standard CSS property, prefixed property or null if not
* supported
*/
function css(property) {
if (cssCache[property] === undefined) {
var domProperty = property.
replace(/(-[\s\S])/g, function(c) { return c.charAt(1).toUpperCase(); });
var prefixedDom = style(domProperty);
cssCache[property] = domToCss(prefixedDom);
}
return cssCache[property];
}
/**
* APIMethod: js
* Detect which property is used for a JS property/method
*
* Parameters:
* obj - {Object} The object to test on
* property - {String} The standard (unprefixed) JS property name
*
* Returns:
* {String} The standard JS property, prefixed property or null if not
* supported
*/
function js(obj, property) {
if (jsCache[property] === undefined) {
var tmpProp,
i = 0,
l = VENDOR_PREFIXES.length,
prefix,
isStyleObj = (typeof obj.cssText !== "undefined");
jsCache[property] = null;
for(; i<l; i++) {
prefix = VENDOR_PREFIXES[i];
if(prefix) {
if (!isStyleObj) {
// js prefix should be lower-case, while style
// properties have upper case on first character
prefix = prefix.toLowerCase();
}
tmpProp = prefix + property.charAt(0).toUpperCase() + property.slice(1);
} else {
tmpProp = property;
}
if(obj[tmpProp] !== undefined) {
jsCache[property] = tmpProp;
break;
}
}
}
return jsCache[property];
}
/**
* APIMethod: style
* Detect which property is used for a DOM style property
*
* Parameters:
* property - {String} The standard (unprefixed) style property name
*
* Returns:
* {String} The standard style property, prefixed property or null if not
* supported
*/
function style(property) {
return js(divStyle, property);
}
return {
css: css,
js: js,
style: style,
// used for testing
cssCache: cssCache,
jsCache: jsCache
};
}());
/* ======================================================================
OpenLayers/Animation.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/SingleFile.js
* @requires OpenLayers/Util/vendorPrefix.js
*/
/**
* Namespace: OpenLayers.Animation
* A collection of utility functions for executing methods that repaint a
* portion of the browser window. These methods take advantage of the
* browser's scheduled repaints where requestAnimationFrame is available.
*/
OpenLayers.Animation = (function(window) {
/**
* Property: isNative
* {Boolean} true if a native requestAnimationFrame function is available
*/
var requestAnimationFrame = OpenLayers.Util.vendorPrefix.js(window, "requestAnimationFrame");
var isNative = !!(requestAnimationFrame);
/**
* Function: requestFrame
* Schedule a function to be called at the next available animation frame.
* Uses the native method where available. Where requestAnimationFrame is
* not available, setTimeout will be called with a 16ms delay.
*
* Parameters:
* callback - {Function} The function to be called at the next animation frame.
* element - {DOMElement} Optional element that visually bounds the animation.
*/
var requestFrame = (function() {
var request = window[requestAnimationFrame] ||
function(callback, element) {
window.setTimeout(callback, 16);
};
// bind to window to avoid illegal invocation of native function
return function(callback, element) {
request.apply(window, [callback, element]);
};
})();
// private variables for animation loops
var counter = 0;
var loops = {};
/**
* Function: start
* Executes a method with <requestFrame> in series for some
* duration.
*
* Parameters:
* callback - {Function} The function to be called at the next animation frame.
* duration - {Number} Optional duration for the loop. If not provided, the
* animation loop will execute indefinitely.
* element - {DOMElement} Optional element that visually bounds the animation.
*
* Returns:
* {Number} Identifier for the animation loop. Used to stop animations with
* <stop>.
*/
function start(callback, duration, element) {
duration = duration > 0 ? duration : Number.POSITIVE_INFINITY;
var id = ++counter;
var start = +new Date;
loops[id] = function() {
if (loops[id] && +new Date - start <= duration) {
callback();
if (loops[id]) {
requestFrame(loops[id], element);
}
} else {
delete loops[id];
}
};
requestFrame(loops[id], element);
return id;
}
/**
* Function: stop
* Terminates an animation loop started with <start>.
*
* Parameters:
* id - {Number} Identifier returned from <start>.
*/
function stop(id) {
delete loops[id];
}
return {
isNative: isNative,
requestFrame: requestFrame,
start: start,
stop: stop
};
})(window);
/* ======================================================================
OpenLayers/Tween.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Animation.js
*/
/**
* Namespace: OpenLayers.Tween
*/
OpenLayers.Tween = OpenLayers.Class({
/**
* APIProperty: easing
* {<OpenLayers.Easing>(Function)} Easing equation used for the animation
* Defaultly set to OpenLayers.Easing.Expo.easeOut
*/
easing: null,
/**
* APIProperty: begin
* {Object} Values to start the animation with
*/
begin: null,
/**
* APIProperty: finish
* {Object} Values to finish the animation with
*/
finish: null,
/**
* APIProperty: duration
* {int} duration of the tween (number of steps)
*/
duration: null,
/**
* APIProperty: callbacks
* {Object} An object with start, eachStep and done properties whose values
* are functions to be call during the animation. They are passed the
* current computed value as argument.
*/
callbacks: null,
/**
* Property: time
* {int} Step counter
*/
time: null,
/**
* APIProperty: minFrameRate
* {Number} The minimum framerate for animations in frames per second. After
* each step, the time spent in the animation is compared to the calculated
* time at this frame rate. If the animation runs longer than the calculated
* time, the next step is skipped. Default is 30.
*/
minFrameRate: null,
/**
* Property: startTime
* {Number} The timestamp of the first execution step. Used for skipping
* frames
*/
startTime: null,
/**
* Property: animationId
* {int} Loop id returned by OpenLayers.Animation.start
*/
animationId: null,
/**
* Property: playing
* {Boolean} Tells if the easing is currently playing
*/
playing: false,
/**
* Constructor: OpenLayers.Tween
* Creates a Tween.
*
* Parameters:
* easing - {<OpenLayers.Easing>(Function)} easing function method to use
*/
initialize: function(easing) {
this.easing = (easing) ? easing : OpenLayers.Easing.Expo.easeOut;
},
/**
* APIMethod: start
* Plays the Tween, and calls the callback method on each step
*
* Parameters:
* begin - {Object} values to start the animation with
* finish - {Object} values to finish the animation with
* duration - {int} duration of the tween (number of steps)
* options - {Object} hash of options (callbacks (start, eachStep, done),
* minFrameRate)
*/
start: function(begin, finish, duration, options) {
this.playing = true;
this.begin = begin;
this.finish = finish;
this.duration = duration;
this.callbacks = options.callbacks;
this.minFrameRate = options.minFrameRate || 30;
this.time = 0;
this.startTime = new Date().getTime();
OpenLayers.Animation.stop(this.animationId);
this.animationId = null;
if (this.callbacks && this.callbacks.start) {
this.callbacks.start.call(this, this.begin);
}
this.animationId = OpenLayers.Animation.start(
OpenLayers.Function.bind(this.play, this)
);
},
/**
* APIMethod: stop
* Stops the Tween, and calls the done callback
* Doesn't do anything if animation is already finished
*/
stop: function() {
if (!this.playing) {
return;
}
if (this.callbacks && this.callbacks.done) {
this.callbacks.done.call(this, this.finish);
}
OpenLayers.Animation.stop(this.animationId);
this.animationId = null;
this.playing = false;
},
/**
* Method: play
* Calls the appropriate easing method
*/
play: function() {
var value = {};
for (var i in this.begin) {
var b = this.begin[i];
var f = this.finish[i];
if (b == null || f == null || isNaN(b) || isNaN(f)) {
throw new TypeError('invalid value for Tween');
}
var c = f - b;
value[i] = this.easing.apply(this, [this.time, b, c, this.duration]);
}
this.time++;
if (this.callbacks && this.callbacks.eachStep) {
// skip frames if frame rate drops below threshold
if ((new Date().getTime() - this.startTime) / this.time <= 1000 / this.minFrameRate) {
this.callbacks.eachStep.call(this, value);
}
}
if (this.time > this.duration) {
this.stop();
}
},
/**
* Create empty functions for all easing methods.
*/
CLASS_NAME: "OpenLayers.Tween"
});
/**
* Namespace: OpenLayers.Easing
*
* Credits:
* Easing Equations by Robert Penner, <http://www.robertpenner.com/easing/>
*/
OpenLayers.Easing = {
/**
* Create empty functions for all easing methods.
*/
CLASS_NAME: "OpenLayers.Easing"
};
/**
* Namespace: OpenLayers.Easing.Linear
*/
OpenLayers.Easing.Linear = {
/**
* Function: easeIn
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeIn: function(t, b, c, d) {
return c*t/d + b;
},
/**
* Function: easeOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeOut: function(t, b, c, d) {
return c*t/d + b;
},
/**
* Function: easeInOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeInOut: function(t, b, c, d) {
return c*t/d + b;
},
CLASS_NAME: "OpenLayers.Easing.Linear"
};
/**
* Namespace: OpenLayers.Easing.Expo
*/
OpenLayers.Easing.Expo = {
/**
* Function: easeIn
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeIn: function(t, b, c, d) {
return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
},
/**
* Function: easeOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeOut: function(t, b, c, d) {
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
},
/**
* Function: easeInOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeInOut: function(t, b, c, d) {
if (t==0) return b;
if (t==d) return b+c;
if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
},
CLASS_NAME: "OpenLayers.Easing.Expo"
};
/**
* Namespace: OpenLayers.Easing.Quad
*/
OpenLayers.Easing.Quad = {
/**
* Function: easeIn
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeIn: function(t, b, c, d) {
return c*(t/=d)*t + b;
},
/**
* Function: easeOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeOut: function(t, b, c, d) {
return -c *(t/=d)*(t-2) + b;
},
/**
* Function: easeInOut
*
* Parameters:
* t - {Float} time
* b - {Float} beginning position
* c - {Float} total change
* d - {Float} duration of the transition
*
* Returns:
* {Float}
*/
easeInOut: function(t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t + b;
return -c/2 * ((--t)*(t-2) - 1) + b;
},
CLASS_NAME: "OpenLayers.Easing.Quad"
};
/* ======================================================================
OpenLayers/Projection.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
*/
/**
* Namespace: OpenLayers.Projection
* Methods for coordinate transforms between coordinate systems. By default,
* OpenLayers ships with the ability to transform coordinates between
* geographic (EPSG:4326) and web or spherical mercator (EPSG:900913 et al.)
* coordinate reference systems. See the <transform> method for details
* on usage.
*
* Additional transforms may be added by using the <proj4js at http://proj4js.org/>
* library. If the proj4js library is included, the <transform> method
* will work between any two coordinate reference systems with proj4js
* definitions.
*
* If the proj4js library is not included, or if you wish to allow transforms
* between arbitrary coordinate reference systems, use the <addTransform>
* method to register a custom transform method.
*/
OpenLayers.Projection = OpenLayers.Class({
/**
* Property: proj
* {Object} Proj4js.Proj instance.
*/
proj: null,
/**
* Property: projCode
* {String}
*/
projCode: null,
/**
* Property: titleRegEx
* {RegExp} regular expression to strip the title from a proj4js definition
*/
titleRegEx: /\+title=[^\+]*/,
/**
* Constructor: OpenLayers.Projection
* This class offers several methods for interacting with a wrapped
* pro4js projection object.
*
* Parameters:
* projCode - {String} A string identifying the Well Known Identifier for
* the projection.
* options - {Object} An optional object to set additional properties
* on the projection.
*
* Returns:
* {<OpenLayers.Projection>} A projection object.
*/
initialize: function(projCode, options) {
OpenLayers.Util.extend(this, options);
this.projCode = projCode;
if (typeof Proj4js == "object") {
this.proj = new Proj4js.Proj(projCode);
}
},
/**
* APIMethod: getCode
* Get the string SRS code.
*
* Returns:
* {String} The SRS code.
*/
getCode: function() {
return this.proj ? this.proj.srsCode : this.projCode;
},
/**
* APIMethod: getUnits
* Get the units string for the projection -- returns null if
* proj4js is not available.
*
* Returns:
* {String} The units abbreviation.
*/
getUnits: function() {
return this.proj ? this.proj.units : null;
},
/**
* Method: toString
* Convert projection to string (getCode wrapper).
*
* Returns:
* {String} The projection code.
*/
toString: function() {
return this.getCode();
},
/**
* Method: equals
* Test equality of two projection instances. Determines equality based
* soley on the projection code.
*
* Returns:
* {Boolean} The two projections are equivalent.
*/
equals: function(projection) {
var p = projection, equals = false;
if (p) {
if (!(p instanceof OpenLayers.Projection)) {
p = new OpenLayers.Projection(p);
}
if ((typeof Proj4js == "object") && this.proj.defData && p.proj.defData) {
equals = this.proj.defData.replace(this.titleRegEx, "") ==
p.proj.defData.replace(this.titleRegEx, "");
} else if (p.getCode) {
var source = this.getCode(), target = p.getCode();
equals = source == target ||
!!OpenLayers.Projection.transforms[source] &&
OpenLayers.Projection.transforms[source][target] ===
OpenLayers.Projection.nullTransform;
}
}
return equals;
},
/* Method: destroy
* Destroy projection object.
*/
destroy: function() {
delete this.proj;
delete this.projCode;
},
CLASS_NAME: "OpenLayers.Projection"
});
/**
* Property: transforms
* {Object} Transforms is an object, with from properties, each of which may
* have a to property. This allows you to define projections without
* requiring support for proj4js to be included.
*
* This object has keys which correspond to a 'source' projection object. The
* keys should be strings, corresponding to the projection.getCode() value.
* Each source projection object should have a set of destination projection
* keys included in the object.
*
* Each value in the destination object should be a transformation function,
* where the function is expected to be passed an object with a .x and a .y
* property. The function should return the object, with the .x and .y
* transformed according to the transformation function.
*
* Note - Properties on this object should not be set directly. To add a
* transform method to this object, use the <addTransform> method. For an
* example of usage, see the OpenLayers.Layer.SphericalMercator file.
*/
OpenLayers.Projection.transforms = {};
/**
* APIProperty: defaults
* {Object} Defaults for the SRS codes known to OpenLayers (currently
* EPSG:4326, CRS:84, urn:ogc:def:crs:EPSG:6.6:4326, EPSG:900913, EPSG:3857,
* EPSG:102113 and EPSG:102100). Keys are the SRS code, values are units,
* maxExtent (the validity extent for the SRS) and yx (true if this SRS is
* known to have a reverse axis order).
*/
OpenLayers.Projection.defaults = {
"EPSG:4326": {
units: "degrees",
maxExtent: [-180, -90, 180, 90],
yx: true
},
"CRS:84": {
units: "degrees",
maxExtent: [-180, -90, 180, 90]
},
"EPSG:900913": {
units: "m",
maxExtent: [-20037508.34, -20037508.34, 20037508.34, 20037508.34]
}
};
/**
* APIMethod: addTransform
* Set a custom transform method between two projections. Use this method in
* cases where the proj4js lib is not available or where custom projections
* need to be handled.
*
* Parameters:
* from - {String} The code for the source projection
* to - {String} the code for the destination projection
* method - {Function} A function that takes a point as an argument and
* transforms that point from the source to the destination projection
* in place. The original point should be modified.
*/
OpenLayers.Projection.addTransform = function(from, to, method) {
if (method === OpenLayers.Projection.nullTransform) {
var defaults = OpenLayers.Projection.defaults[from];
if (defaults && !OpenLayers.Projection.defaults[to]) {
OpenLayers.Projection.defaults[to] = defaults;
}
}
if(!OpenLayers.Projection.transforms[from]) {
OpenLayers.Projection.transforms[from] = {};
}
OpenLayers.Projection.transforms[from][to] = method;
};
/**
* APIMethod: transform
* Transform a point coordinate from one projection to another. Note that
* the input point is transformed in place.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point> | Object} An object with x and y
* properties representing coordinates in those dimensions.
* source - {OpenLayers.Projection} Source map coordinate system
* dest - {OpenLayers.Projection} Destination map coordinate system
*
* Returns:
* point - {object} A transformed coordinate. The original point is modified.
*/
OpenLayers.Projection.transform = function(point, source, dest) {
if (source && dest) {
if (!(source instanceof OpenLayers.Projection)) {
source = new OpenLayers.Projection(source);
}
if (!(dest instanceof OpenLayers.Projection)) {
dest = new OpenLayers.Projection(dest);
}
if (source.proj && dest.proj) {
point = Proj4js.transform(source.proj, dest.proj, point);
} else {
var sourceCode = source.getCode();
var destCode = dest.getCode();
var transforms = OpenLayers.Projection.transforms;
if (transforms[sourceCode] && transforms[sourceCode][destCode]) {
transforms[sourceCode][destCode](point);
}
}
}
return point;
};
/**
* APIFunction: nullTransform
* A null transformation - useful for defining projection aliases when
* proj4js is not available:
*
* (code)
* OpenLayers.Projection.addTransform("EPSG:3857", "EPSG:900913",
* OpenLayers.Projection.nullTransform);
* OpenLayers.Projection.addTransform("EPSG:900913", "EPSG:3857",
* OpenLayers.Projection.nullTransform);
* (end)
*/
OpenLayers.Projection.nullTransform = function(point) {
return point;
};
/**
* Note: Transforms for web mercator <-> geographic
* OpenLayers recognizes EPSG:3857, EPSG:900913, EPSG:102113 and EPSG:102100.
* OpenLayers originally started referring to EPSG:900913 as web mercator.
* The EPSG has declared EPSG:3857 to be web mercator.
* ArcGIS 10 recognizes the EPSG:3857, EPSG:102113, and EPSG:102100 as
* equivalent. See http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/11/20/ArcGIS-Online-moving-to-Google-_2F00_-Bing-tiling-scheme_3A00_-What-does-this-mean-for-you_3F00_.aspx#12084.
* For geographic, OpenLayers recognizes EPSG:4326, CRS:84 and
* urn:ogc:def:crs:EPSG:6.6:4326. OpenLayers also knows about the reverse axis
* order for EPSG:4326.
*/
(function() {
var pole = 20037508.34;
function inverseMercator(xy) {
xy.x = 180 * xy.x / pole;
xy.y = 180 / Math.PI * (2 * Math.atan(Math.exp((xy.y / pole) * Math.PI)) - Math.PI / 2);
return xy;
}
function forwardMercator(xy) {
xy.x = xy.x * pole / 180;
var y = Math.log(Math.tan((90 + xy.y) * Math.PI / 360)) / Math.PI * pole;
xy.y = Math.max(-20037508.34, Math.min(y, 20037508.34));
return xy;
}
function map(base, codes) {
var add = OpenLayers.Projection.addTransform;
var same = OpenLayers.Projection.nullTransform;
var i, len, code, other, j;
for (i=0, len=codes.length; i<len; ++i) {
code = codes[i];
add(base, code, forwardMercator);
add(code, base, inverseMercator);
for (j=i+1; j<len; ++j) {
other = codes[j];
add(code, other, same);
add(other, code, same);
}
}
}
// list of equivalent codes for web mercator
var mercator = ["EPSG:900913", "EPSG:3857", "EPSG:102113", "EPSG:102100"],
geographic = ["CRS:84", "urn:ogc:def:crs:EPSG:6.6:4326", "EPSG:4326"],
i;
for (i=mercator.length-1; i>=0; --i) {
map(mercator[i], geographic);
}
for (i=geographic.length-1; i>=0; --i) {
map(geographic[i], mercator);
}
})();
/* ======================================================================
OpenLayers/Map.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
* @requires OpenLayers/Util/vendorPrefix.js
* @requires OpenLayers/Events.js
* @requires OpenLayers/Tween.js
* @requires OpenLayers/Projection.js
*/
/**
* Class: OpenLayers.Map
* Instances of OpenLayers.Map are interactive maps embedded in a web page.
* Create a new map with the <OpenLayers.Map> constructor.
*
* On their own maps do not provide much functionality. To extend a map
* it's necessary to add controls (<OpenLayers.Control>) and
* layers (<OpenLayers.Layer>) to the map.
*/
OpenLayers.Map = OpenLayers.Class({
/**
* Constant: Z_INDEX_BASE
* {Object} Base z-indexes for different classes of thing
*/
Z_INDEX_BASE: {
BaseLayer: 100,
Overlay: 325,
Feature: 725,
Popup: 750,
Control: 1000
},
/**
* APIProperty: events
* {<OpenLayers.Events>}
*
* Register a listener for a particular event with the following syntax:
* (code)
* map.events.register(type, obj, listener);
* (end)
*
* Listeners will be called with a reference to an event object. The
* properties of this event depends on exactly what happened.
*
* All event objects have at least the following properties:
* object - {Object} A reference to map.events.object.
* element - {DOMElement} A reference to map.events.element.
*
* Browser events have the following additional properties:
* xy - {<OpenLayers.Pixel>} The pixel location of the event (relative
* to the the map viewport).
*
* Supported map event types:
* preaddlayer - triggered before a layer has been added. The event
* object will include a *layer* property that references the layer
* to be added. When a listener returns "false" the adding will be
* aborted.
* addlayer - triggered after a layer has been added. The event object
* will include a *layer* property that references the added layer.
* preremovelayer - triggered before a layer has been removed. The event
* object will include a *layer* property that references the layer
* to be removed. When a listener returns "false" the removal will be
* aborted.
* removelayer - triggered after a layer has been removed. The event
* object will include a *layer* property that references the removed
* layer.
* changelayer - triggered after a layer name change, order change,
* opacity change, params change, visibility change (actual visibility,
* not the layer's visibility property) or attribution change (due to
* extent change). Listeners will receive an event object with *layer*
* and *property* properties. The *layer* property will be a reference
* to the changed layer. The *property* property will be a key to the
* changed property (name, order, opacity, params, visibility or
* attribution).
* movestart - triggered after the start of a drag, pan, or zoom. The event
* object may include a *zoomChanged* property that tells whether the
* zoom has changed.
* move - triggered after each drag, pan, or zoom
* moveend - triggered after a drag, pan, or zoom completes
* zoomend - triggered after a zoom completes
* mouseover - triggered after mouseover the map
* mouseout - triggered after mouseout the map
* mousemove - triggered after mousemove the map
* changebaselayer - triggered after the base layer changes
* updatesize - triggered after the <updateSize> method was executed
*/
/**
* Property: id
* {String} Unique identifier for the map
*/
id: null,
/**
* Property: fractionalZoom
* {Boolean} For a base layer that supports it, allow the map resolution
* to be set to a value between one of the values in the resolutions
* array. Default is false.
*
* When fractionalZoom is set to true, it is possible to zoom to
* an arbitrary extent. This requires a base layer from a source
* that supports requests for arbitrary extents (i.e. not cached
* tiles on a regular lattice). This means that fractionalZoom
* will not work with commercial layers (Google, Yahoo, VE), layers
* using TileCache, or any other pre-cached data sources.
*
* If you are using fractionalZoom, then you should also use
* <getResolutionForZoom> instead of layer.resolutions[zoom] as the
* former works for non-integer zoom levels.
*/
fractionalZoom: false,
/**
* APIProperty: events
* {<OpenLayers.Events>} An events object that handles all
* events on the map
*/
events: null,
/**
* APIProperty: allOverlays
* {Boolean} Allow the map to function with "overlays" only. Defaults to
* false. If true, the lowest layer in the draw order will act as
* the base layer. In addition, if set to true, all layers will
* have isBaseLayer set to false when they are added to the map.
*
* Note:
* If you set map.allOverlays to true, then you *cannot* use
* map.setBaseLayer or layer.setIsBaseLayer. With allOverlays true,
* the lowest layer in the draw layer is the base layer. So, to change
* the base layer, use <setLayerIndex> or <raiseLayer> to set the layer
* index to 0.
*/
allOverlays: false,
/**
* APIProperty: div
* {DOMElement|String} The element that contains the map (or an id for
* that element). If the <OpenLayers.Map> constructor is called
* with two arguments, this should be provided as the first argument.
* Alternatively, the map constructor can be called with the options
* object as the only argument. In this case (one argument), a
* div property may or may not be provided. If the div property
* is not provided, the map can be rendered to a container later
* using the <render> method.
*
* Note:
* If you are calling <render> after map construction, do not use
* <maxResolution> auto. Instead, divide your <maxExtent> by your
* maximum expected dimension.
*/
div: null,
/**
* Property: dragging
* {Boolean} The map is currently being dragged.
*/
dragging: false,
/**
* Property: size
* {<OpenLayers.Size>} Size of the main div (this.div)
*/
size: null,
/**
* Property: viewPortDiv
* {HTMLDivElement} The element that represents the map viewport
*/
viewPortDiv: null,
/**
* Property: layerContainerOrigin
* {<OpenLayers.LonLat>} The lonlat at which the later container was
* re-initialized (on-zoom)
*/
layerContainerOrigin: null,
/**
* Property: layerContainerDiv
* {HTMLDivElement} The element that contains the layers.
*/
layerContainerDiv: null,
/**
* APIProperty: layers
* {Array(<OpenLayers.Layer>)} Ordered list of layers in the map
*/
layers: null,
/**
* APIProperty: controls
* {Array(<OpenLayers.Control>)} List of controls associated with the map.
*
* If not provided in the map options at construction, the map will
* by default be given the following controls if present in the build:
* - <OpenLayers.Control.Navigation> or <OpenLayers.Control.TouchNavigation>
* - <OpenLayers.Control.Zoom> or <OpenLayers.Control.PanZoom>
* - <OpenLayers.Control.ArgParser>
* - <OpenLayers.Control.Attribution>
*/
controls: null,
/**
* Property: popups
* {Array(<OpenLayers.Popup>)} List of popups associated with the map
*/
popups: null,
/**
* APIProperty: baseLayer
* {<OpenLayers.Layer>} The currently selected base layer. This determines
* min/max zoom level, projection, etc.
*/
baseLayer: null,
/**
* Property: center
* {<OpenLayers.LonLat>} The current center of the map
*/
center: null,
/**
* Property: resolution
* {Float} The resolution of the map.
*/
resolution: null,
/**
* Property: zoom
* {Integer} The current zoom level of the map
*/
zoom: 0,
/**
* Property: panRatio
* {Float} The ratio of the current extent within
* which panning will tween.
*/
panRatio: 1.5,
/**
* APIProperty: options
* {Object} The options object passed to the class constructor. Read-only.
*/
options: null,
// Options
/**
* APIProperty: tileSize
* {<OpenLayers.Size>} Set in the map options to override the default tile
* size for this map.
*/
tileSize: null,
/**
* APIProperty: projection
* {String} Set in the map options to specify the default projection
* for layers added to this map. When using a projection other than EPSG:4326
* (CRS:84, Geographic) or EPSG:3857 (EPSG:900913, Web Mercator),
* also set maxExtent, maxResolution or resolutions. Default is "EPSG:4326".
* Note that the projection of the map is usually determined
* by that of the current baseLayer (see <baseLayer> and <getProjectionObject>).
*/
projection: "EPSG:4326",
/**
* APIProperty: units
* {String} The map units. Possible values are 'degrees' (or 'dd'), 'm',
* 'ft', 'km', 'mi', 'inches'. Normally taken from the projection.
* Only required if both map and layers do not define a projection,
* or if they define a projection which does not define units
*/
units: null,
/**
* APIProperty: resolutions
* {Array(Float)} A list of map resolutions (map units per pixel) in
* descending order. If this is not set in the layer constructor, it
* will be set based on other resolution related properties
* (maxExtent, maxResolution, maxScale, etc.).
*/
resolutions: null,
/**
* APIProperty: maxResolution
* {Float} Required if you are not displaying the whole world on a tile
* with the size specified in <tileSize>.
*/
maxResolution: null,
/**
* APIProperty: minResolution
* {Float}
*/
minResolution: null,
/**
* APIProperty: maxScale
* {Float}
*/
maxScale: null,
/**
* APIProperty: minScale
* {Float}
*/
minScale: null,
/**
* APIProperty: maxExtent
* {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* The maximum extent for the map.
* Default depends on projection; if this is one of those defined in OpenLayers.Projection.defaults
* (EPSG:4326 or web mercator), maxExtent will be set to the value defined there;
* else, defaults to null.
* To restrict user panning and zooming of the map, use <restrictedExtent> instead.
* The value for <maxExtent> will change calculations for tile URLs.
*/
maxExtent: null,
/**
* APIProperty: minExtent
* {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* The minimum extent for the map. Defaults to null.
*/
minExtent: null,
/**
* APIProperty: restrictedExtent
* {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* Limit map navigation to this extent where possible.
* If a non-null restrictedExtent is set, panning will be restricted
* to the given bounds. In addition, zooming to a resolution that
* displays more than the restricted extent will center the map
* on the restricted extent. If you wish to limit the zoom level
* or resolution, use maxResolution.
*/
restrictedExtent: null,
/**
* APIProperty: numZoomLevels
* {Integer} Number of zoom levels for the map. Defaults to 16. Set a
* different value in the map options if needed.
*/
numZoomLevels: 16,
/**
* APIProperty: theme
* {String} Relative path to a CSS file from which to load theme styles.
* Specify null in the map options (e.g. {theme: null}) if you
* want to get cascading style declarations - by putting links to
* stylesheets or style declarations directly in your page.
*/
theme: null,
/**
* APIProperty: displayProjection
* {<OpenLayers.Projection>} Requires proj4js support for projections other
* than EPSG:4326 or EPSG:900913/EPSG:3857. Projection used by
* several controls to display data to user. If this property is set,
* it will be set on any control which has a null displayProjection
* property at the time the control is added to the map.
*/
displayProjection: null,
/**
* APIProperty: tileManager
* {<OpenLayers.TileManager>|Object} By default, and if the build contains
* TileManager.js, the map will use the TileManager to queue image requests
* and to cache tile image elements. To create a map without a TileManager
* configure the map with tileManager: null. To create a TileManager with
* non-default options, supply the options instead or alternatively supply
* an instance of {<OpenLayers.TileManager>}.
*/
/**
* APIProperty: fallThrough
* {Boolean} Should OpenLayers allow events on the map to fall through to
* other elements on the page, or should it swallow them? (#457)
* Default is to swallow.
*/
fallThrough: false,
/**
* APIProperty: autoUpdateSize
* {Boolean} Should OpenLayers automatically update the size of the map
* when the resize event is fired. Default is true.
*/
autoUpdateSize: true,
/**
* APIProperty: eventListeners
* {Object} If set as an option at construction, the eventListeners
* object will be registered with <OpenLayers.Events.on>. Object
* structure must be a listeners object as shown in the example for
* the events.on method.
*/
eventListeners: null,
/**
* Property: panTween
* {<OpenLayers.Tween>} Animated panning tween object, see panTo()
*/
panTween: null,
/**
* APIProperty: panMethod
* {Function} The Easing function to be used for tweening. Default is
* OpenLayers.Easing.Expo.easeOut. Setting this to 'null' turns off
* animated panning.
*/
panMethod: OpenLayers.Easing.Expo.easeOut,
/**
* Property: panDuration
* {Integer} The number of steps to be passed to the
* OpenLayers.Tween.start() method when the map is
* panned.
* Default is 50.
*/
panDuration: 50,
/**
* Property: zoomTween
* {<OpenLayers.Tween>} Animated zooming tween object, see zoomTo()
*/
zoomTween: null,
/**
* APIProperty: zoomMethod
* {Function} The Easing function to be used for tweening. Default is
* OpenLayers.Easing.Quad.easeOut. Setting this to 'null' turns off
* animated zooming.
*/
zoomMethod: OpenLayers.Easing.Quad.easeOut,
/**
* Property: zoomDuration
* {Integer} The number of steps to be passed to the
* OpenLayers.Tween.start() method when the map is zoomed.
* Default is 20.
*/
zoomDuration: 20,
/**
* Property: paddingForPopups
* {<OpenLayers.Bounds>} Outside margin of the popup. Used to prevent
* the popup from getting too close to the map border.
*/
paddingForPopups : null,
/**
* Property: layerContainerOriginPx
* {Object} Cached object representing the layer container origin (in pixels).
*/
layerContainerOriginPx: null,
/**
* Property: minPx
* {Object} An object with a 'x' and 'y' values that is the lower
* left of maxExtent in viewport pixel space.
* Used to verify in moveByPx that the new location we're moving to
* is valid. It is also used in the getLonLatFromViewPortPx function
* of Layer.
*/
minPx: null,
/**
* Property: maxPx
* {Object} An object with a 'x' and 'y' values that is the top
* right of maxExtent in viewport pixel space.
* Used to verify in moveByPx that the new location we're moving to
* is valid.
*/
maxPx: null,
/**
* Constructor: OpenLayers.Map
* Constructor for a new OpenLayers.Map instance. There are two possible
* ways to call the map constructor. See the examples below.
*
* Parameters:
* div - {DOMElement|String} The element or id of an element in your page
* that will contain the map. May be omitted if the <div> option is
* provided or if you intend to call the <render> method later.
* options - {Object} Optional object with properties to tag onto the map.
*
* Valid options (in addition to the listed API properties):
* center - {<OpenLayers.LonLat>|Array} The default initial center of the map.
* If provided as array, the first value is the x coordinate,
* and the 2nd value is the y coordinate.
* Only specify if <layers> is provided.
* Note that if an ArgParser/Permalink control is present,
* and the querystring contains coordinates, center will be set
* by that, and this option will be ignored.
* zoom - {Number} The initial zoom level for the map. Only specify if
* <layers> is provided.
* Note that if an ArgParser/Permalink control is present,
* and the querystring contains a zoom level, zoom will be set
* by that, and this option will be ignored.
* extent - {<OpenLayers.Bounds>|Array} The initial extent of the map.
* If provided as an array, the array should consist of
* four values (left, bottom, right, top).
* Only specify if <center> and <zoom> are not provided.
*
* Examples:
* (code)
* // create a map with default options in an element with the id "map1"
* var map = new OpenLayers.Map("map1");
*
* // create a map with non-default options in an element with id "map2"
* var options = {
* projection: "EPSG:3857",
* maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000),
* center: new OpenLayers.LonLat(-12356463.476333, 5621521.4854095)
* };
* var map = new OpenLayers.Map("map2", options);
*
* // map with non-default options - same as above but with a single argument,
* // a restricted extent, and using arrays for bounds and center
* var map = new OpenLayers.Map({
* div: "map_id",
* projection: "EPSG:3857",
* maxExtent: [-18924313.432222, -15538711.094146, 18924313.432222, 15538711.094146],
* restrictedExtent: [-13358338.893333, -9608371.5085962, 13358338.893333, 9608371.5085962],
* center: [-12356463.476333, 5621521.4854095]
* });
*
* // create a map without a reference to a container - call render later
* var map = new OpenLayers.Map({
* projection: "EPSG:3857",
* maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000)
* });
* (end)
*/
initialize: function (div, options) {
// If only one argument is provided, check if it is an object.
if(arguments.length === 1 && typeof div === "object") {
options = div;
div = options && options.div;
}
// Simple-type defaults are set in class definition.
// Now set complex-type defaults
this.tileSize = new OpenLayers.Size(OpenLayers.Map.TILE_WIDTH,
OpenLayers.Map.TILE_HEIGHT);
this.paddingForPopups = new OpenLayers.Bounds(15, 15, 15, 15);
this.theme = OpenLayers._getScriptLocation() +
'theme/default/style.css';
// backup original options
this.options = OpenLayers.Util.extend({}, options);
// now override default options
OpenLayers.Util.extend(this, options);
var projCode = this.projection instanceof OpenLayers.Projection ?
this.projection.projCode : this.projection;
OpenLayers.Util.applyDefaults(this, OpenLayers.Projection.defaults[projCode]);
// allow extents and center to be arrays
if (this.maxExtent && !(this.maxExtent instanceof OpenLayers.Bounds)) {
this.maxExtent = new OpenLayers.Bounds(this.maxExtent);
}
if (this.minExtent && !(this.minExtent instanceof OpenLayers.Bounds)) {
this.minExtent = new OpenLayers.Bounds(this.minExtent);
}
if (this.restrictedExtent && !(this.restrictedExtent instanceof OpenLayers.Bounds)) {
this.restrictedExtent = new OpenLayers.Bounds(this.restrictedExtent);
}
if (this.center && !(this.center instanceof OpenLayers.LonLat)) {
this.center = new OpenLayers.LonLat(this.center);
}
// initialize layers array
this.layers = [];
this.id = OpenLayers.Util.createUniqueID("OpenLayers.Map_");
this.div = OpenLayers.Util.getElement(div);
if(!this.div) {
this.div = document.createElement("div");
this.div.style.height = "1px";
this.div.style.width = "1px";
}
OpenLayers.Element.addClass(this.div, 'olMap');
// the viewPortDiv is the outermost div we modify
var id = this.id + "_OpenLayers_ViewPort";
this.viewPortDiv = OpenLayers.Util.createDiv(id, null, null, null,
"relative", null,
"hidden");
this.viewPortDiv.style.width = "100%";
this.viewPortDiv.style.height = "100%";
this.viewPortDiv.className = "olMapViewport";
this.div.appendChild(this.viewPortDiv);
this.events = new OpenLayers.Events(
this, this.viewPortDiv, null, this.fallThrough,
{includeXY: true}
);
if (OpenLayers.TileManager && this.tileManager !== null) {
if (!(this.tileManager instanceof OpenLayers.TileManager)) {
this.tileManager = new OpenLayers.TileManager(this.tileManager);
}
this.tileManager.addMap(this);
}
// the layerContainerDiv is the one that holds all the layers
id = this.id + "_OpenLayers_Container";
this.layerContainerDiv = OpenLayers.Util.createDiv(id);
this.layerContainerDiv.style.zIndex=this.Z_INDEX_BASE['Popup']-1;
this.layerContainerOriginPx = {x: 0, y: 0};
this.applyTransform();
this.viewPortDiv.appendChild(this.layerContainerDiv);
this.updateSize();
if(this.eventListeners instanceof Object) {
this.events.on(this.eventListeners);
}
if (this.autoUpdateSize === true) {
// updateSize on catching the window's resize
// Note that this is ok, as updateSize() does nothing if the
// map's size has not actually changed.
this.updateSizeDestroy = OpenLayers.Function.bind(this.updateSize,
this);
OpenLayers.Event.observe(window, 'resize',
this.updateSizeDestroy);
}
// only append link stylesheet if the theme property is set
if(this.theme) {
// check existing links for equivalent url
var addNode = true;
var nodes = document.getElementsByTagName('link');
for(var i=0, len=nodes.length; i<len; ++i) {
if(OpenLayers.Util.isEquivalentUrl(nodes.item(i).href,
this.theme)) {
addNode = false;
break;
}
}
// only add a new node if one with an equivalent url hasn't already
// been added
if(addNode) {
var cssNode = document.createElement('link');
cssNode.setAttribute('rel', 'stylesheet');
cssNode.setAttribute('type', 'text/css');
cssNode.setAttribute('href', this.theme);
document.getElementsByTagName('head')[0].appendChild(cssNode);
}
}
if (this.controls == null) { // default controls
this.controls = [];
if (OpenLayers.Control != null) { // running full or lite?
// Navigation or TouchNavigation depending on what is in build
if (OpenLayers.Control.Navigation) {
this.controls.push(new OpenLayers.Control.Navigation());
} else if (OpenLayers.Control.TouchNavigation) {
this.controls.push(new OpenLayers.Control.TouchNavigation());
}
if (OpenLayers.Control.Zoom) {
this.controls.push(new OpenLayers.Control.Zoom());
} else if (OpenLayers.Control.PanZoom) {
this.controls.push(new OpenLayers.Control.PanZoom());
}
if (OpenLayers.Control.ArgParser) {
this.controls.push(new OpenLayers.Control.ArgParser());
}
if (OpenLayers.Control.Attribution) {
this.controls.push(new OpenLayers.Control.Attribution());
}
}
}
for(var i=0, len=this.controls.length; i<len; i++) {
this.addControlToMap(this.controls[i]);
}
this.popups = [];
this.unloadDestroy = OpenLayers.Function.bind(this.destroy, this);
// always call map.destroy()
OpenLayers.Event.observe(window, 'unload', this.unloadDestroy);
// add any initial layers
if (options && options.layers) {
/**
* If you have set options.center, the map center property will be
* set at this point. However, since setCenter has not been called,
* addLayers gets confused. So we delete the map center in this
* case. Because the check below uses options.center, it will
* be properly set below.
*/
delete this.center;
delete this.zoom;
this.addLayers(options.layers);
// set center (and optionally zoom)
if (options.center && !this.getCenter()) {
// zoom can be undefined here
this.setCenter(options.center, options.zoom);
}
}
if (this.panMethod) {
this.panTween = new OpenLayers.Tween(this.panMethod);
}
if (this.zoomMethod && this.applyTransform.transform) {
this.zoomTween = new OpenLayers.Tween(this.zoomMethod);
}
},
/**
* APIMethod: getViewport
* Get the DOMElement representing the view port.
*
* Returns:
* {DOMElement}
*/
getViewport: function() {
return this.viewPortDiv;
},
/**
* APIMethod: render
* Render the map to a specified container.
*
* Parameters:
* div - {String|DOMElement} The container that the map should be rendered
* to. If different than the current container, the map viewport
* will be moved from the current to the new container.
*/
render: function(div) {
this.div = OpenLayers.Util.getElement(div);
OpenLayers.Element.addClass(this.div, 'olMap');
this.viewPortDiv.parentNode.removeChild(this.viewPortDiv);
this.div.appendChild(this.viewPortDiv);
this.updateSize();
},
/**
* Method: unloadDestroy
* Function that is called to destroy the map on page unload. stored here
* so that if map is manually destroyed, we can unregister this.
*/
unloadDestroy: null,
/**
* Method: updateSizeDestroy
* When the map is destroyed, we need to stop listening to updateSize
* events: this method stores the function we need to unregister in
* non-IE browsers.
*/
updateSizeDestroy: null,
/**
* APIMethod: destroy
* Destroy this map.
* Note that if you are using an application which removes a container
* of the map from the DOM, you need to ensure that you destroy the
* map *before* this happens; otherwise, the page unload handler
* will fail because the DOM elements that map.destroy() wants
* to clean up will be gone. (See
* http://trac.osgeo.org/openlayers/ticket/2277 for more information).
* This will apply to GeoExt and also to other applications which
* modify the DOM of the container of the OpenLayers Map.
*/
destroy:function() {
// if unloadDestroy is null, we've already been destroyed
if (!this.unloadDestroy) {
return false;
}
// make sure panning doesn't continue after destruction
if(this.panTween) {
this.panTween.stop();
this.panTween = null;
}
// make sure zooming doesn't continue after destruction
if(this.zoomTween) {
this.zoomTween.stop();
this.zoomTween = null;
}
// map has been destroyed. dont do it again!
OpenLayers.Event.stopObserving(window, 'unload', this.unloadDestroy);
this.unloadDestroy = null;
if (this.updateSizeDestroy) {
OpenLayers.Event.stopObserving(window, 'resize',
this.updateSizeDestroy);
}
this.paddingForPopups = null;
if (this.controls != null) {
for (var i = this.controls.length - 1; i>=0; --i) {
this.controls[i].destroy();
}
this.controls = null;
}
if (this.layers != null) {
for (var i = this.layers.length - 1; i>=0; --i) {
//pass 'false' to destroy so that map wont try to set a new
// baselayer after each baselayer is removed
this.layers[i].destroy(false);
}
this.layers = null;
}
if (this.viewPortDiv && this.viewPortDiv.parentNode) {
this.viewPortDiv.parentNode.removeChild(this.viewPortDiv);
}
this.viewPortDiv = null;
if (this.tileManager) {
this.tileManager.removeMap(this);
this.tileManager = null;
}
if(this.eventListeners) {
this.events.un(this.eventListeners);
this.eventListeners = null;
}
this.events.destroy();
this.events = null;
this.options = null;
},
/**
* APIMethod: setOptions
* Change the map options
*
* Parameters:
* options - {Object} Hashtable of options to tag to the map
*/
setOptions: function(options) {
var updatePxExtent = this.minPx &&
options.restrictedExtent != this.restrictedExtent;
OpenLayers.Util.extend(this, options);
// force recalculation of minPx and maxPx
updatePxExtent && this.moveTo(this.getCachedCenter(), this.zoom, {
forceZoomChange: true
});
},
/**
* APIMethod: getTileSize
* Get the tile size for the map
*
* Returns:
* {<OpenLayers.Size>}
*/
getTileSize: function() {
return this.tileSize;
},
/**
* APIMethod: getBy
* Get a list of objects given a property and a match item.
*
* Parameters:
* array - {String} A property on the map whose value is an array.
* property - {String} A property on each item of the given array.
* match - {String | Object} A string to match. Can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* match.test(map[array][i][property]) evaluates to true, the item will
* be included in the array returned. If no items are found, an empty
* array is returned.
*
* Returns:
* {Array} An array of items where the given property matches the given
* criteria.
*/
getBy: function(array, property, match) {
var test = (typeof match.test == "function");
var found = OpenLayers.Array.filter(this[array], function(item) {
return item[property] == match || (test && match.test(item[property]));
});
return found;
},
/**
* APIMethod: getLayersBy
* Get a list of layers with properties matching the given criteria.
*
* Parameters:
* property - {String} A layer property to be matched.
* match - {String | Object} A string to match. Can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* match.test(layer[property]) evaluates to true, the layer will be
* included in the array returned. If no layers are found, an empty
* array is returned.
*
* Returns:
* {Array(<OpenLayers.Layer>)} A list of layers matching the given criteria.
* An empty array is returned if no matches are found.
*/
getLayersBy: function(property, match) {
return this.getBy("layers", property, match);
},
/**
* APIMethod: getLayersByName
* Get a list of layers with names matching the given name.
*
* Parameters:
* match - {String | Object} A layer name. The name can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* name.test(layer.name) evaluates to true, the layer will be included
* in the list of layers returned. If no layers are found, an empty
* array is returned.
*
* Returns:
* {Array(<OpenLayers.Layer>)} A list of layers matching the given name.
* An empty array is returned if no matches are found.
*/
getLayersByName: function(match) {
return this.getLayersBy("name", match);
},
/**
* APIMethod: getLayersByClass
* Get a list of layers of a given class (CLASS_NAME).
*
* Parameters:
* match - {String | Object} A layer class name. The match can also be a
* regular expression literal or object. In addition, it can be any
* object with a method named test. For reqular expressions or other,
* if type.test(layer.CLASS_NAME) evaluates to true, the layer will
* be included in the list of layers returned. If no layers are
* found, an empty array is returned.
*
* Returns:
* {Array(<OpenLayers.Layer>)} A list of layers matching the given class.
* An empty array is returned if no matches are found.
*/
getLayersByClass: function(match) {
return this.getLayersBy("CLASS_NAME", match);
},
/**
* APIMethod: getControlsBy
* Get a list of controls with properties matching the given criteria.
*
* Parameters:
* property - {String} A control property to be matched.
* match - {String | Object} A string to match. Can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* match.test(layer[property]) evaluates to true, the layer will be
* included in the array returned. If no layers are found, an empty
* array is returned.
*
* Returns:
* {Array(<OpenLayers.Control>)} A list of controls matching the given
* criteria. An empty array is returned if no matches are found.
*/
getControlsBy: function(property, match) {
return this.getBy("controls", property, match);
},
/**
* APIMethod: getControlsByClass
* Get a list of controls of a given class (CLASS_NAME).
*
* Parameters:
* match - {String | Object} A control class name. The match can also be a
* regular expression literal or object. In addition, it can be any
* object with a method named test. For reqular expressions or other,
* if type.test(control.CLASS_NAME) evaluates to true, the control will
* be included in the list of controls returned. If no controls are
* found, an empty array is returned.
*
* Returns:
* {Array(<OpenLayers.Control>)} A list of controls matching the given class.
* An empty array is returned if no matches are found.
*/
getControlsByClass: function(match) {
return this.getControlsBy("CLASS_NAME", match);
},
/********************************************************/
/* */
/* Layer Functions */
/* */
/* The following functions deal with adding and */
/* removing Layers to and from the Map */
/* */
/********************************************************/
/**
* APIMethod: getLayer
* Get a layer based on its id
*
* Parameters:
* id - {String} A layer id
*
* Returns:
* {<OpenLayers.Layer>} The Layer with the corresponding id from the map's
* layer collection, or null if not found.
*/
getLayer: function(id) {
var foundLayer = null;
for (var i=0, len=this.layers.length; i<len; i++) {
var layer = this.layers[i];
if (layer.id == id) {
foundLayer = layer;
break;
}
}
return foundLayer;
},
/**
* Method: setLayerZIndex
*
* Parameters:
* layer - {<OpenLayers.Layer>}
* zIdx - {int}
*/
setLayerZIndex: function (layer, zIdx) {
layer.setZIndex(
this.Z_INDEX_BASE[layer.isBaseLayer ? 'BaseLayer' : 'Overlay']
+ zIdx * 5 );
},
/**
* Method: resetLayersZIndex
* Reset each layer's z-index based on layer's array index
*/
resetLayersZIndex: function() {
for (var i=0, len=this.layers.length; i<len; i++) {
var layer = this.layers[i];
this.setLayerZIndex(layer, i);
}
},
/**
* APIMethod: addLayer
*
* Parameters:
* layer - {<OpenLayers.Layer>}
*
* Returns:
* {Boolean} True if the layer has been added to the map.
*/
addLayer: function (layer) {
for(var i = 0, len = this.layers.length; i < len; i++) {
if (this.layers[i] == layer) {
return false;
}
}
if (this.events.triggerEvent("preaddlayer", {layer: layer}) === false) {
return false;
}
if(this.allOverlays) {
layer.isBaseLayer = false;
}
layer.div.className = "olLayerDiv";
layer.div.style.overflow = "";
this.setLayerZIndex(layer, this.layers.length);
if (layer.isFixed) {
this.viewPortDiv.appendChild(layer.div);
} else {
this.layerContainerDiv.appendChild(layer.div);
}
this.layers.push(layer);
layer.setMap(this);
if (layer.isBaseLayer || (this.allOverlays && !this.baseLayer)) {
if (this.baseLayer == null) {
// set the first baselaye we add as the baselayer
this.setBaseLayer(layer);
} else {
layer.setVisibility(false);
}
} else {
layer.redraw();
}
this.events.triggerEvent("addlayer", {layer: layer});
layer.events.triggerEvent("added", {map: this, layer: layer});
layer.afterAdd();
return true;
},
/**
* APIMethod: addLayers
*
* Parameters:
* layers - {Array(<OpenLayers.Layer>)}
*/
addLayers: function (layers) {
for (var i=0, len=layers.length; i<len; i++) {
this.addLayer(layers[i]);
}
},
/**
* APIMethod: removeLayer
* Removes a layer from the map by removing its visual element (the
* layer.div property), then removing it from the map's internal list
* of layers, setting the layer's map property to null.
*
* a "removelayer" event is triggered.
*
* very worthy of mention is that simply removing a layer from a map
* will not cause the removal of any popups which may have been created
* by the layer. this is due to the fact that it was decided at some
* point that popups would not belong to layers. thus there is no way
* for us to know here to which layer the popup belongs.
*
* A simple solution to this is simply to call destroy() on the layer.
* the default OpenLayers.Layer class's destroy() function
* automatically takes care to remove itself from whatever map it has
* been attached to.
*
* The correct solution is for the layer itself to register an
* event-handler on "removelayer" and when it is called, if it
* recognizes itself as the layer being removed, then it cycles through
* its own personal list of popups, removing them from the map.
*
* Parameters:
* layer - {<OpenLayers.Layer>}
* setNewBaseLayer - {Boolean} Default is true
*/
removeLayer: function(layer, setNewBaseLayer) {
if (this.events.triggerEvent("preremovelayer", {layer: layer}) === false) {
return;
}
if (setNewBaseLayer == null) {
setNewBaseLayer = true;
}
if (layer.isFixed) {
this.viewPortDiv.removeChild(layer.div);
} else {
this.layerContainerDiv.removeChild(layer.div);
}
OpenLayers.Util.removeItem(this.layers, layer);
layer.removeMap(this);
layer.map = null;
// if we removed the base layer, need to set a new one
if(this.baseLayer == layer) {
this.baseLayer = null;
if(setNewBaseLayer) {
for(var i=0, len=this.layers.length; i<len; i++) {
var iLayer = this.layers[i];
if (iLayer.isBaseLayer || this.allOverlays) {
this.setBaseLayer(iLayer);
break;
}
}
}
}
this.resetLayersZIndex();
this.events.triggerEvent("removelayer", {layer: layer});
layer.events.triggerEvent("removed", {map: this, layer: layer});
},
/**
* APIMethod: getNumLayers
*
* Returns:
* {Int} The number of layers attached to the map.
*/
getNumLayers: function () {
return this.layers.length;
},
/**
* APIMethod: getLayerIndex
*
* Parameters:
* layer - {<OpenLayers.Layer>}
*
* Returns:
* {Integer} The current (zero-based) index of the given layer in the map's
* layer stack. Returns -1 if the layer isn't on the map.
*/
getLayerIndex: function (layer) {
return OpenLayers.Util.indexOf(this.layers, layer);
},
/**
* APIMethod: setLayerIndex
* Move the given layer to the specified (zero-based) index in the layer
* list, changing its z-index in the map display. Use
* map.getLayerIndex() to find out the current index of a layer. Note
* that this cannot (or at least should not) be effectively used to
* raise base layers above overlays.
*
* Parameters:
* layer - {<OpenLayers.Layer>}
* idx - {int}
*/
setLayerIndex: function (layer, idx) {
var base = this.getLayerIndex(layer);
if (idx < 0) {
idx = 0;
} else if (idx > this.layers.length) {
idx = this.layers.length;
}
if (base != idx) {
this.layers.splice(base, 1);
this.layers.splice(idx, 0, layer);
for (var i=0, len=this.layers.length; i<len; i++) {
this.setLayerZIndex(this.layers[i], i);
}
this.events.triggerEvent("changelayer", {
layer: layer, property: "order"
});
if(this.allOverlays) {
if(idx === 0) {
this.setBaseLayer(layer);
} else if(this.baseLayer !== this.layers[0]) {
this.setBaseLayer(this.layers[0]);
}
}
}
},
/**
* APIMethod: raiseLayer
* Change the index of the given layer by delta. If delta is positive,
* the layer is moved up the map's layer stack; if delta is negative,
* the layer is moved down. Again, note that this cannot (or at least
* should not) be effectively used to raise base layers above overlays.
*
* Paremeters:
* layer - {<OpenLayers.Layer>}
* delta - {int}
*/
raiseLayer: function (layer, delta) {
var idx = this.getLayerIndex(layer) + delta;
this.setLayerIndex(layer, idx);
},
/**
* APIMethod: setBaseLayer
* Allows user to specify one of the currently-loaded layers as the Map's
* new base layer.
*
* Parameters:
* newBaseLayer - {<OpenLayers.Layer>}
*/
setBaseLayer: function(newBaseLayer) {
if (newBaseLayer != this.baseLayer) {
// ensure newBaseLayer is already loaded
if (OpenLayers.Util.indexOf(this.layers, newBaseLayer) != -1) {
// preserve center and scale when changing base layers
var center = this.getCachedCenter();
var newResolution = OpenLayers.Util.getResolutionFromScale(
this.getScale(), newBaseLayer.units
);
// make the old base layer invisible
if (this.baseLayer != null && !this.allOverlays) {
this.baseLayer.setVisibility(false);
}
// set new baselayer
this.baseLayer = newBaseLayer;
if(!this.allOverlays || this.baseLayer.visibility) {
this.baseLayer.setVisibility(true);
// Layer may previously have been visible but not in range.
// In this case we need to redraw it to make it visible.
if (this.baseLayer.inRange === false) {
this.baseLayer.redraw();
}
}
// recenter the map
if (center != null) {
// new zoom level derived from old scale
var newZoom = this.getZoomForResolution(
newResolution || this.resolution, true
);
// zoom and force zoom change
this.setCenter(center, newZoom, false, true);
}
this.events.triggerEvent("changebaselayer", {
layer: this.baseLayer
});
}
}
},
/********************************************************/
/* */
/* Control Functions */
/* */
/* The following functions deal with adding and */
/* removing Controls to and from the Map */
/* */
/********************************************************/
/**
* APIMethod: addControl
* Add the passed over control to the map. Optionally
* position the control at the given pixel.
*
* Parameters:
* control - {<OpenLayers.Control>}
* px - {<OpenLayers.Pixel>}
*/
addControl: function (control, px) {
this.controls.push(control);
this.addControlToMap(control, px);
},
/**
* APIMethod: addControls
* Add all of the passed over controls to the map.
* You can pass over an optional second array
* with pixel-objects to position the controls.
* The indices of the two arrays should match and
* you can add null as pixel for those controls
* you want to be autopositioned.
*
* Parameters:
* controls - {Array(<OpenLayers.Control>)}
* pixels - {Array(<OpenLayers.Pixel>)}
*/
addControls: function (controls, pixels) {
var pxs = (arguments.length === 1) ? [] : pixels;
for (var i=0, len=controls.length; i<len; i++) {
var ctrl = controls[i];
var px = (pxs[i]) ? pxs[i] : null;
this.addControl( ctrl, px );
}
},
/**
* Method: addControlToMap
*
* Parameters:
*
* control - {<OpenLayers.Control>}
* px - {<OpenLayers.Pixel>}
*/
addControlToMap: function (control, px) {
// If a control doesn't have a div at this point, it belongs in the
// viewport.
control.outsideViewport = (control.div != null);
// If the map has a displayProjection, and the control doesn't, set
// the display projection.
if (this.displayProjection && !control.displayProjection) {
control.displayProjection = this.displayProjection;
}
control.setMap(this);
var div = control.draw(px);
if (div) {
if(!control.outsideViewport) {
div.style.zIndex = this.Z_INDEX_BASE['Control'] +
this.controls.length;
this.viewPortDiv.appendChild( div );
}
}
if(control.autoActivate) {
control.activate();
}
},
/**
* APIMethod: getControl
*
* Parameters:
* id - {String} ID of the control to return.
*
* Returns:
* {<OpenLayers.Control>} The control from the map's list of controls
* which has a matching 'id'. If none found,
* returns null.
*/
getControl: function (id) {
var returnControl = null;
for(var i=0, len=this.controls.length; i<len; i++) {
var control = this.controls[i];
if (control.id == id) {
returnControl = control;
break;
}
}
return returnControl;
},
/**
* APIMethod: removeControl
* Remove a control from the map. Removes the control both from the map
* object's internal array of controls, as well as from the map's
* viewPort (assuming the control was not added outsideViewport)
*
* Parameters:
* control - {<OpenLayers.Control>} The control to remove.
*/
removeControl: function (control) {
//make sure control is non-null and actually part of our map
if ( (control) && (control == this.getControl(control.id)) ) {
if (control.div && (control.div.parentNode == this.viewPortDiv)) {
this.viewPortDiv.removeChild(control.div);
}
OpenLayers.Util.removeItem(this.controls, control);
}
},
/********************************************************/
/* */
/* Popup Functions */
/* */
/* The following functions deal with adding and */
/* removing Popups to and from the Map */
/* */
/********************************************************/
/**
* APIMethod: addPopup
*
* Parameters:
* popup - {<OpenLayers.Popup>}
* exclusive - {Boolean} If true, closes all other popups first
*/
addPopup: function(popup, exclusive) {
if (exclusive) {
//remove all other popups from screen
for (var i = this.popups.length - 1; i >= 0; --i) {
this.removePopup(this.popups[i]);
}
}
popup.map = this;
this.popups.push(popup);
var popupDiv = popup.draw();
if (popupDiv) {
popupDiv.style.zIndex = this.Z_INDEX_BASE['Popup'] +
this.popups.length;
this.layerContainerDiv.appendChild(popupDiv);
}
},
/**
* APIMethod: removePopup
*
* Parameters:
* popup - {<OpenLayers.Popup>}
*/
removePopup: function(popup) {
OpenLayers.Util.removeItem(this.popups, popup);
if (popup.div) {
try { this.layerContainerDiv.removeChild(popup.div); }
catch (e) { } // Popups sometimes apparently get disconnected
// from the layerContainerDiv, and cause complaints.
}
popup.map = null;
},
/********************************************************/
/* */
/* Container Div Functions */
/* */
/* The following functions deal with the access to */
/* and maintenance of the size of the container div */
/* */
/********************************************************/
/**
* APIMethod: getSize
*
* Returns:
* {<OpenLayers.Size>} An <OpenLayers.Size> object that represents the
* size, in pixels, of the div into which OpenLayers
* has been loaded.
* Note - A clone() of this locally cached variable is
* returned, so as not to allow users to modify it.
*/
getSize: function () {
var size = null;
if (this.size != null) {
size = this.size.clone();
}
return size;
},
/**
* APIMethod: updateSize
* This function should be called by any external code which dynamically
* changes the size of the map div (because mozilla wont let us catch
* the "onresize" for an element)
*/
updateSize: function() {
// the div might have moved on the page, also
var newSize = this.getCurrentSize();
if (newSize && !isNaN(newSize.h) && !isNaN(newSize.w)) {
this.events.clearMouseCache();
var oldSize = this.getSize();
if (oldSize == null) {
this.size = oldSize = newSize;
}
if (!newSize.equals(oldSize)) {
// store the new size
this.size = newSize;
//notify layers of mapresize
for(var i=0, len=this.layers.length; i<len; i++) {
this.layers[i].onMapResize();
}
var center = this.getCachedCenter();
if (this.baseLayer != null && center != null) {
var zoom = this.getZoom();
this.zoom = null;
this.setCenter(center, zoom);
}
}
}
this.events.triggerEvent("updatesize");
},
/**
* Method: getCurrentSize
*
* Returns:
* {<OpenLayers.Size>} A new <OpenLayers.Size> object with the dimensions
* of the map div
*/
getCurrentSize: function() {
var size = new OpenLayers.Size(this.div.clientWidth,
this.div.clientHeight);
if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
size.w = this.div.offsetWidth;
size.h = this.div.offsetHeight;
}
if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
size.w = parseInt(this.div.style.width);
size.h = parseInt(this.div.style.height);
}
return size;
},
/**
* Method: calculateBounds
*
* Parameters:
* center - {<OpenLayers.LonLat>} Default is this.getCenter()
* resolution - {float} Default is this.getResolution()
*
* Returns:
* {<OpenLayers.Bounds>} A bounds based on resolution, center, and
* current mapsize.
*/
calculateBounds: function(center, resolution) {
var extent = null;
if (center == null) {
center = this.getCachedCenter();
}
if (resolution == null) {
resolution = this.getResolution();
}
if ((center != null) && (resolution != null)) {
var halfWDeg = (this.size.w * resolution) / 2;
var halfHDeg = (this.size.h * resolution) / 2;
extent = new OpenLayers.Bounds(center.lon - halfWDeg,
center.lat - halfHDeg,
center.lon + halfWDeg,
center.lat + halfHDeg);
}
return extent;
},
/********************************************************/
/* */
/* Zoom, Center, Pan Functions */
/* */
/* The following functions handle the validation, */
/* getting and setting of the Zoom Level and Center */
/* as well as the panning of the Map */
/* */
/********************************************************/
/**
* APIMethod: getCenter
*
* Returns:
* {<OpenLayers.LonLat>}
*/
getCenter: function () {
var center = null;
var cachedCenter = this.getCachedCenter();
if (cachedCenter) {
center = cachedCenter.clone();
}
return center;
},
/**
* Method: getCachedCenter
*
* Returns:
* {<OpenLayers.LonLat>}
*/
getCachedCenter: function() {
if (!this.center && this.size) {
this.center = this.getLonLatFromViewPortPx({
x: this.size.w / 2,
y: this.size.h / 2
});
}
return this.center;
},
/**
* APIMethod: getZoom
*
* Returns:
* {Integer}
*/
getZoom: function () {
return this.zoom;
},
/**
* APIMethod: pan
* Allows user to pan by a value of screen pixels
*
* Parameters:
* dx - {Integer}
* dy - {Integer}
* options - {Object} Options to configure panning:
* - *animate* {Boolean} Use panTo instead of setCenter. Default is true.
* - *dragging* {Boolean} Call setCenter with dragging true. Default is
* false.
*/
pan: function(dx, dy, options) {
options = OpenLayers.Util.applyDefaults(options, {
animate: true,
dragging: false
});
if (options.dragging) {
if (dx != 0 || dy != 0) {
this.moveByPx(dx, dy);
}
} else {
// getCenter
var centerPx = this.getViewPortPxFromLonLat(this.getCachedCenter());
// adjust
var newCenterPx = centerPx.add(dx, dy);
if (this.dragging || !newCenterPx.equals(centerPx)) {
var newCenterLonLat = this.getLonLatFromViewPortPx(newCenterPx);
if (options.animate) {
this.panTo(newCenterLonLat);
} else {
this.moveTo(newCenterLonLat);
if(this.dragging) {
this.dragging = false;
this.events.triggerEvent("moveend");
}
}
}
}
},
/**
* APIMethod: panTo
* Allows user to pan to a new lonlat
* If the new lonlat is in the current extent the map will slide smoothly
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
*/
panTo: function(lonlat) {
if (this.panTween && this.getExtent().scale(this.panRatio).containsLonLat(lonlat)) {
var center = this.getCachedCenter();
// center will not change, don't do nothing
if (lonlat.equals(center)) {
return;
}
var from = this.getPixelFromLonLat(center);
var to = this.getPixelFromLonLat(lonlat);
var vector = { x: to.x - from.x, y: to.y - from.y };
var last = { x: 0, y: 0 };
this.panTween.start( { x: 0, y: 0 }, vector, this.panDuration, {
callbacks: {
eachStep: OpenLayers.Function.bind(function(px) {
var x = px.x - last.x,
y = px.y - last.y;
this.moveByPx(x, y);
last.x = Math.round(px.x);
last.y = Math.round(px.y);
}, this),
done: OpenLayers.Function.bind(function(px) {
this.moveTo(lonlat);
this.dragging = false;
this.events.triggerEvent("moveend");
}, this)
}
});
} else {
this.setCenter(lonlat);
}
},
/**
* APIMethod: setCenter
* Set the map center (and optionally, the zoom level).
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>|Array} The new center location.
* If provided as array, the first value is the x coordinate,
* and the 2nd value is the y coordinate.
* zoom - {Integer} Optional zoom level.
* dragging - {Boolean} Specifies whether or not to trigger
* movestart/end events
* forceZoomChange - {Boolean} Specifies whether or not to trigger zoom
* change events (needed on baseLayer change)
*
* TBD: reconsider forceZoomChange in 3.0
*/
setCenter: function(lonlat, zoom, dragging, forceZoomChange) {
if (this.panTween) {
this.panTween.stop();
}
if (this.zoomTween) {
this.zoomTween.stop();
}
this.moveTo(lonlat, zoom, {
'dragging': dragging,
'forceZoomChange': forceZoomChange
});
},
/**
* Method: moveByPx
* Drag the map by pixels.
*
* Parameters:
* dx - {Number}
* dy - {Number}
*/
moveByPx: function(dx, dy) {
var hw = this.size.w / 2;
var hh = this.size.h / 2;
var x = hw + dx;
var y = hh + dy;
var wrapDateLine = this.baseLayer.wrapDateLine;
var xRestriction = 0;
var yRestriction = 0;
if (this.restrictedExtent) {
xRestriction = hw;
yRestriction = hh;
// wrapping the date line makes no sense for restricted extents
wrapDateLine = false;
}
dx = wrapDateLine ||
x <= this.maxPx.x - xRestriction &&
x >= this.minPx.x + xRestriction ? Math.round(dx) : 0;
dy = y <= this.maxPx.y - yRestriction &&
y >= this.minPx.y + yRestriction ? Math.round(dy) : 0;
if (dx || dy) {
if (!this.dragging) {
this.dragging = true;
this.events.triggerEvent("movestart");
}
this.center = null;
if (dx) {
this.layerContainerOriginPx.x -= dx;
this.minPx.x -= dx;
this.maxPx.x -= dx;
}
if (dy) {
this.layerContainerOriginPx.y -= dy;
this.minPx.y -= dy;
this.maxPx.y -= dy;
}
this.applyTransform();
var layer, i, len;
for (i=0, len=this.layers.length; i<len; ++i) {
layer = this.layers[i];
if (layer.visibility &&
(layer === this.baseLayer || layer.inRange)) {
layer.moveByPx(dx, dy);
layer.events.triggerEvent("move");
}
}
this.events.triggerEvent("move");
}
},
/**
* Method: adjustZoom
*
* Parameters:
* zoom - {Number} The zoom level to adjust
*
* Returns:
* {Integer} Adjusted zoom level that shows a map not wider than its
* <baseLayer>'s maxExtent.
*/
adjustZoom: function(zoom) {
if (this.baseLayer && this.baseLayer.wrapDateLine) {
var resolution, resolutions = this.baseLayer.resolutions,
maxResolution = this.getMaxExtent().getWidth() / this.size.w;
if (this.getResolutionForZoom(zoom) > maxResolution) {
if (this.fractionalZoom) {
zoom = this.getZoomForResolution(maxResolution);
} else {
for (var i=zoom|0, ii=resolutions.length; i<ii; ++i) {
if (resolutions[i] <= maxResolution) {
zoom = i;
break;
}
}
}
}
}
return zoom;
},
/**
* APIMethod: getMinZoom
* Returns the minimum zoom level for the current map view. If the base
* layer is configured with <wrapDateLine> set to true, this will be the
* first zoom level that shows no more than one world width in the current
* map viewport. Components that rely on this value (e.g. zoom sliders)
* should also listen to the map's "updatesize" event and call this method
* in the "updatesize" listener.
*
* Returns:
* {Number} Minimum zoom level that shows a map not wider than its
* <baseLayer>'s maxExtent. This is an Integer value, unless the map is
* configured with <fractionalZoom> set to true.
*/
getMinZoom: function() {
return this.adjustZoom(0);
},
/**
* Method: moveTo
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
* zoom - {Integer}
* options - {Object}
*/
moveTo: function(lonlat, zoom, options) {
if (lonlat != null && !(lonlat instanceof OpenLayers.LonLat)) {
lonlat = new OpenLayers.LonLat(lonlat);
}
if (!options) {
options = {};
}
if (zoom != null) {
zoom = parseFloat(zoom);
if (!this.fractionalZoom) {
zoom = Math.round(zoom);
}
}
var requestedZoom = zoom;
zoom = this.adjustZoom(zoom);
if (zoom !== requestedZoom) {
// zoom was adjusted, so keep old lonlat to avoid panning
lonlat = this.getCenter();
}
// dragging is false by default
var dragging = options.dragging || this.dragging;
// forceZoomChange is false by default
var forceZoomChange = options.forceZoomChange;
if (!this.getCachedCenter() && !this.isValidLonLat(lonlat)) {
lonlat = this.maxExtent.getCenterLonLat();
this.center = lonlat.clone();
}
if(this.restrictedExtent != null) {
// In 3.0, decide if we want to change interpretation of maxExtent.
if(lonlat == null) {
lonlat = this.center;
}
if(zoom == null) {
zoom = this.getZoom();
}
var resolution = this.getResolutionForZoom(zoom);
var extent = this.calculateBounds(lonlat, resolution);
if(!this.restrictedExtent.containsBounds(extent)) {
var maxCenter = this.restrictedExtent.getCenterLonLat();
if(extent.getWidth() > this.restrictedExtent.getWidth()) {
lonlat = new OpenLayers.LonLat(maxCenter.lon, lonlat.lat);
} else if(extent.left < this.restrictedExtent.left) {
lonlat = lonlat.add(this.restrictedExtent.left -
extent.left, 0);
} else if(extent.right > this.restrictedExtent.right) {
lonlat = lonlat.add(this.restrictedExtent.right -
extent.right, 0);
}
if(extent.getHeight() > this.restrictedExtent.getHeight()) {
lonlat = new OpenLayers.LonLat(lonlat.lon, maxCenter.lat);
} else if(extent.bottom < this.restrictedExtent.bottom) {
lonlat = lonlat.add(0, this.restrictedExtent.bottom -
extent.bottom);
}
else if(extent.top > this.restrictedExtent.top) {
lonlat = lonlat.add(0, this.restrictedExtent.top -
extent.top);
}
}
}
var zoomChanged = forceZoomChange || (
(this.isValidZoomLevel(zoom)) &&
(zoom != this.getZoom()) );
var centerChanged = (this.isValidLonLat(lonlat)) &&
(!lonlat.equals(this.center));
// if neither center nor zoom will change, no need to do anything
if (zoomChanged || centerChanged || dragging) {
dragging || this.events.triggerEvent("movestart", {
zoomChanged: zoomChanged
});
if (centerChanged) {
if (!zoomChanged && this.center) {
// if zoom hasnt changed, just slide layerContainer
// (must be done before setting this.center to new value)
this.centerLayerContainer(lonlat);
}
this.center = lonlat.clone();
}
var res = zoomChanged ?
this.getResolutionForZoom(zoom) : this.getResolution();
// (re)set the layerContainerDiv's location
if (zoomChanged || this.layerContainerOrigin == null) {
this.layerContainerOrigin = this.getCachedCenter();
this.layerContainerOriginPx.x = 0;
this.layerContainerOriginPx.y = 0;
this.applyTransform();
var maxExtent = this.getMaxExtent({restricted: true});
var maxExtentCenter = maxExtent.getCenterLonLat();
var lonDelta = this.center.lon - maxExtentCenter.lon;
var latDelta = maxExtentCenter.lat - this.center.lat;
var extentWidth = Math.round(maxExtent.getWidth() / res);
var extentHeight = Math.round(maxExtent.getHeight() / res);
this.minPx = {
x: (this.size.w - extentWidth) / 2 - lonDelta / res,
y: (this.size.h - extentHeight) / 2 - latDelta / res
};
this.maxPx = {
x: this.minPx.x + Math.round(maxExtent.getWidth() / res),
y: this.minPx.y + Math.round(maxExtent.getHeight() / res)
};
}
if (zoomChanged) {
this.zoom = zoom;
this.resolution = res;
}
var bounds = this.getExtent();
//send the move call to the baselayer and all the overlays
if(this.baseLayer.visibility) {
this.baseLayer.moveTo(bounds, zoomChanged, options.dragging);
options.dragging || this.baseLayer.events.triggerEvent(
"moveend", {zoomChanged: zoomChanged}
);
}
bounds = this.baseLayer.getExtent();
for (var i=this.layers.length-1; i>=0; --i) {
var layer = this.layers[i];
if (layer !== this.baseLayer && !layer.isBaseLayer) {
var inRange = layer.calculateInRange();
if (layer.inRange != inRange) {
// the inRange property has changed. If the layer is
// no longer in range, we turn it off right away. If
// the layer is no longer out of range, the moveTo
// call below will turn on the layer.
layer.inRange = inRange;
if (!inRange) {
layer.display(false);
}
this.events.triggerEvent("changelayer", {
layer: layer, property: "visibility"
});
}
if (inRange && layer.visibility) {
layer.moveTo(bounds, zoomChanged, options.dragging);
options.dragging || layer.events.triggerEvent(
"moveend", {zoomChanged: zoomChanged}
);
}
}
}
this.events.triggerEvent("move");
dragging || this.events.triggerEvent("moveend");
if (zoomChanged) {
//redraw popups
for (var i=0, len=this.popups.length; i<len; i++) {
this.popups[i].updatePosition();
}
this.events.triggerEvent("zoomend");
}
}
},
/**
* Method: centerLayerContainer
* This function takes care to recenter the layerContainerDiv.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
*/
centerLayerContainer: function (lonlat) {
var originPx = this.getViewPortPxFromLonLat(this.layerContainerOrigin);
var newPx = this.getViewPortPxFromLonLat(lonlat);
if ((originPx != null) && (newPx != null)) {
var oldLeft = this.layerContainerOriginPx.x;
var oldTop = this.layerContainerOriginPx.y;
var newLeft = Math.round(originPx.x - newPx.x);
var newTop = Math.round(originPx.y - newPx.y);
this.applyTransform(
(this.layerContainerOriginPx.x = newLeft),
(this.layerContainerOriginPx.y = newTop));
var dx = oldLeft - newLeft;
var dy = oldTop - newTop;
this.minPx.x -= dx;
this.maxPx.x -= dx;
this.minPx.y -= dy;
this.maxPx.y -= dy;
}
},
/**
* Method: isValidZoomLevel
*
* Parameters:
* zoomLevel - {Integer}
*
* Returns:
* {Boolean} Whether or not the zoom level passed in is non-null and
* within the min/max range of zoom levels.
*/
isValidZoomLevel: function(zoomLevel) {
return ( (zoomLevel != null) &&
(zoomLevel >= 0) &&
(zoomLevel < this.getNumZoomLevels()) );
},
/**
* Method: isValidLonLat
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
*
* Returns:
* {Boolean} Whether or not the lonlat passed in is non-null and within
* the maxExtent bounds
*/
isValidLonLat: function(lonlat) {
var valid = false;
if (lonlat != null) {
var maxExtent = this.getMaxExtent();
var worldBounds = this.baseLayer.wrapDateLine && maxExtent;
valid = maxExtent.containsLonLat(lonlat, {worldBounds: worldBounds});
}
return valid;
},
/********************************************************/
/* */
/* Layer Options */
/* */
/* Accessor functions to Layer Options parameters */
/* */
/********************************************************/
/**
* APIMethod: getProjection
* This method returns a string representing the projection. In
* the case of projection support, this will be the srsCode which
* is loaded -- otherwise it will simply be the string value that
* was passed to the projection at startup.
*
* FIXME: In 3.0, we will remove getProjectionObject, and instead
* return a Projection object from this function.
*
* Returns:
* {String} The Projection string from the base layer or null.
*/
getProjection: function() {
var projection = this.getProjectionObject();
return projection ? projection.getCode() : null;
},
/**
* APIMethod: getProjectionObject
* Returns the projection obect from the baselayer.
*
* Returns:
* {<OpenLayers.Projection>} The Projection of the base layer.
*/
getProjectionObject: function() {
var projection = null;
if (this.baseLayer != null) {
projection = this.baseLayer.projection;
}
return projection;
},
/**
* APIMethod: getMaxResolution
*
* Returns:
* {String} The Map's Maximum Resolution
*/
getMaxResolution: function() {
var maxResolution = null;
if (this.baseLayer != null) {
maxResolution = this.baseLayer.maxResolution;
}
return maxResolution;
},
/**
* APIMethod: getMaxExtent
*
* Parameters:
* options - {Object}
*
* Allowed Options:
* restricted - {Boolean} If true, returns restricted extent (if it is
* available.)
*
* Returns:
* {<OpenLayers.Bounds>} The maxExtent property as set on the current
* baselayer, unless the 'restricted' option is set, in which case
* the 'restrictedExtent' option from the map is returned (if it
* is set).
*/
getMaxExtent: function (options) {
var maxExtent = null;
if(options && options.restricted && this.restrictedExtent){
maxExtent = this.restrictedExtent;
} else if (this.baseLayer != null) {
maxExtent = this.baseLayer.maxExtent;
}
return maxExtent;
},
/**
* APIMethod: getNumZoomLevels
*
* Returns:
* {Integer} The total number of zoom levels that can be displayed by the
* current baseLayer.
*/
getNumZoomLevels: function() {
var numZoomLevels = null;
if (this.baseLayer != null) {
numZoomLevels = this.baseLayer.numZoomLevels;
}
return numZoomLevels;
},
/********************************************************/
/* */
/* Baselayer Functions */
/* */
/* The following functions, all publicly exposed */
/* in the API?, are all merely wrappers to the */
/* the same calls on whatever layer is set as */
/* the current base layer */
/* */
/********************************************************/
/**
* APIMethod: getExtent
*
* Returns:
* {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat
* bounds of the current viewPort.
* If no baselayer is set, returns null.
*/
getExtent: function () {
var extent = null;
if (this.baseLayer != null) {
extent = this.baseLayer.getExtent();
}
return extent;
},
/**
* APIMethod: getResolution
*
* Returns:
* {Float} The current resolution of the map.
* If no baselayer is set, returns null.
*/
getResolution: function () {
var resolution = null;
if (this.baseLayer != null) {
resolution = this.baseLayer.getResolution();
} else if(this.allOverlays === true && this.layers.length > 0) {
// while adding the 1st layer to the map in allOverlays mode,
// this.baseLayer is not set yet when we need the resolution
// for calculateInRange.
resolution = this.layers[0].getResolution();
}
return resolution;
},
/**
* APIMethod: getUnits
*
* Returns:
* {Float} The current units of the map.
* If no baselayer is set, returns null.
*/
getUnits: function () {
var units = null;
if (this.baseLayer != null) {
units = this.baseLayer.units;
}
return units;
},
/**
* APIMethod: getScale
*
* Returns:
* {Float} The current scale denominator of the map.
* If no baselayer is set, returns null.
*/
getScale: function () {
var scale = null;
if (this.baseLayer != null) {
var res = this.getResolution();
var units = this.baseLayer.units;
scale = OpenLayers.Util.getScaleFromResolution(res, units);
}
return scale;
},
/**
* APIMethod: getZoomForExtent
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
* closest - {Boolean} Find the zoom level that most closely fits the
* specified bounds. Note that this may result in a zoom that does
* not exactly contain the entire extent.
* Default is false.
*
* Returns:
* {Integer} A suitable zoom level for the specified bounds.
* If no baselayer is set, returns null.
*/
getZoomForExtent: function (bounds, closest) {
var zoom = null;
if (this.baseLayer != null) {
zoom = this.baseLayer.getZoomForExtent(bounds, closest);
}
return zoom;
},
/**
* APIMethod: getResolutionForZoom
*
* Parameters:
* zoom - {Float}
*
* Returns:
* {Float} A suitable resolution for the specified zoom. If no baselayer
* is set, returns null.
*/
getResolutionForZoom: function(zoom) {
var resolution = null;
if(this.baseLayer) {
resolution = this.baseLayer.getResolutionForZoom(zoom);
}
return resolution;
},
/**
* APIMethod: getZoomForResolution
*
* Parameters:
* resolution - {Float}
* closest - {Boolean} Find the zoom level that corresponds to the absolute
* closest resolution, which may result in a zoom whose corresponding
* resolution is actually smaller than we would have desired (if this
* is being called from a getZoomForExtent() call, then this means that
* the returned zoom index might not actually contain the entire
* extent specified... but it'll be close).
* Default is false.
*
* Returns:
* {Integer} A suitable zoom level for the specified resolution.
* If no baselayer is set, returns null.
*/
getZoomForResolution: function(resolution, closest) {
var zoom = null;
if (this.baseLayer != null) {
zoom = this.baseLayer.getZoomForResolution(resolution, closest);
}
return zoom;
},
/********************************************************/
/* */
/* Zooming Functions */
/* */
/* The following functions, all publicly exposed */
/* in the API, are all merely wrappers to the */
/* the setCenter() function */
/* */
/********************************************************/
/**
* APIMethod: zoomTo
* Zoom to a specific zoom level. Zooming will be animated unless the map
* is configured with {zoomMethod: null}. To zoom without animation, use
* <setCenter> without a lonlat argument.
*
* Parameters:
* zoom - {Integer}
*/
zoomTo: function(zoom, xy) {
// non-API arguments:
// xy - {<OpenLayers.Pixel>} optional zoom origin
var map = this;
if (map.isValidZoomLevel(zoom)) {
if (map.baseLayer.wrapDateLine) {
zoom = map.adjustZoom(zoom);
}
if (map.zoomTween) {
var currentRes = map.getResolution(),
targetRes = map.getResolutionForZoom(zoom),
start = {scale: 1},
end = {scale: currentRes / targetRes};
if (map.zoomTween.playing && map.zoomTween.duration < 3 * map.zoomDuration) {
// update the end scale, and reuse the running zoomTween
map.zoomTween.finish = {
scale: map.zoomTween.finish.scale * end.scale
};
} else {
if (!xy) {
var size = map.getSize();
xy = {x: size.w / 2, y: size.h / 2};
}
map.zoomTween.start(start, end, map.zoomDuration, {
minFrameRate: 50, // don't spend much time zooming
callbacks: {
eachStep: function(data) {
var containerOrigin = map.layerContainerOriginPx,
scale = data.scale,
dx = ((scale - 1) * (containerOrigin.x - xy.x)) | 0,
dy = ((scale - 1) * (containerOrigin.y - xy.y)) | 0;
map.applyTransform(containerOrigin.x + dx, containerOrigin.y + dy, scale);
},
done: function(data) {
map.applyTransform();
var resolution = map.getResolution() / data.scale,
zoom = map.getZoomForResolution(resolution, true)
map.moveTo(map.getZoomTargetCenter(xy, resolution), zoom, true);
}
}
});
}
} else {
var center = xy ?
map.getZoomTargetCenter(xy, map.getResolutionForZoom(zoom)) :
null;
map.setCenter(center, zoom);
}
}
},
/**
* APIMethod: zoomIn
*
*/
zoomIn: function() {
this.zoomTo(this.getZoom() + 1);
},
/**
* APIMethod: zoomOut
*
*/
zoomOut: function() {
this.zoomTo(this.getZoom() - 1);
},
/**
* APIMethod: zoomToExtent
* Zoom to the passed in bounds, recenter
*
* Parameters:
* bounds - {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* closest - {Boolean} Find the zoom level that most closely fits the
* specified bounds. Note that this may result in a zoom that does
* not exactly contain the entire extent.
* Default is false.
*
*/
zoomToExtent: function(bounds, closest) {
if (!(bounds instanceof OpenLayers.Bounds)) {
bounds = new OpenLayers.Bounds(bounds);
}
var center = bounds.getCenterLonLat();
if (this.baseLayer.wrapDateLine) {
var maxExtent = this.getMaxExtent();
//fix straddling bounds (in the case of a bbox that straddles the
// dateline, it's left and right boundaries will appear backwards.
// we fix this by allowing a right value that is greater than the
// max value at the dateline -- this allows us to pass a valid
// bounds to calculate zoom)
//
bounds = bounds.clone();
while (bounds.right < bounds.left) {
bounds.right += maxExtent.getWidth();
}
//if the bounds was straddling (see above), then the center point
// we got from it was wrong. So we take our new bounds and ask it
// for the center.
//
center = bounds.getCenterLonLat().wrapDateLine(maxExtent);
}
this.setCenter(center, this.getZoomForExtent(bounds, closest));
},
/**
* APIMethod: zoomToMaxExtent
* Zoom to the full extent and recenter.
*
* Parameters:
* options - {Object}
*
* Allowed Options:
* restricted - {Boolean} True to zoom to restricted extent if it is
* set. Defaults to true.
*/
zoomToMaxExtent: function(options) {
//restricted is true by default
var restricted = (options) ? options.restricted : true;
var maxExtent = this.getMaxExtent({
'restricted': restricted
});
this.zoomToExtent(maxExtent);
},
/**
* APIMethod: zoomToScale
* Zoom to a specified scale
*
* Parameters:
* scale - {float}
* closest - {Boolean} Find the zoom level that most closely fits the
* specified scale. Note that this may result in a zoom that does
* not exactly contain the entire extent.
* Default is false.
*
*/
zoomToScale: function(scale, closest) {
var res = OpenLayers.Util.getResolutionFromScale(scale,
this.baseLayer.units);
var halfWDeg = (this.size.w * res) / 2;
var halfHDeg = (this.size.h * res) / 2;
var center = this.getCachedCenter();
var extent = new OpenLayers.Bounds(center.lon - halfWDeg,
center.lat - halfHDeg,
center.lon + halfWDeg,
center.lat + halfHDeg);
this.zoomToExtent(extent, closest);
},
/********************************************************/
/* */
/* Translation Functions */
/* */
/* The following functions translate between */
/* LonLat, LayerPx, and ViewPortPx */
/* */
/********************************************************/
//
// TRANSLATION: LonLat <-> ViewPortPx
//
/**
* Method: getLonLatFromViewPortPx
*
* Parameters:
* viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
* an object with a 'x'
* and 'y' properties.
*
* Returns:
* {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in view
* port <OpenLayers.Pixel>, translated into lon/lat
* by the current base layer.
*/
getLonLatFromViewPortPx: function (viewPortPx) {
var lonlat = null;
if (this.baseLayer != null) {
lonlat = this.baseLayer.getLonLatFromViewPortPx(viewPortPx);
}
return lonlat;
},
/**
* APIMethod: getViewPortPxFromLonLat
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>}
*
* Returns:
* {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in
* <OpenLayers.LonLat>, translated into view port
* pixels by the current base layer.
*/
getViewPortPxFromLonLat: function (lonlat) {
var px = null;
if (this.baseLayer != null) {
px = this.baseLayer.getViewPortPxFromLonLat(lonlat);
}
return px;
},
/**
* Method: getZoomTargetCenter
*
* Parameters:
* xy - {<OpenLayers.Pixel>} The zoom origin pixel location on the screen
* resolution - {Float} The resolution we want to get the center for
*
* Returns:
* {<OpenLayers.LonLat>} The location of the map center after the
* transformation described by the origin xy and the target resolution.
*/
getZoomTargetCenter: function (xy, resolution) {
var lonlat = null,
size = this.getSize(),
deltaX = size.w/2 - xy.x,
deltaY = xy.y - size.h/2,
zoomPoint = this.getLonLatFromPixel(xy);
if (zoomPoint) {
lonlat = new OpenLayers.LonLat(
zoomPoint.lon + deltaX * resolution,
zoomPoint.lat + deltaY * resolution
);
}
return lonlat;
},
//
// CONVENIENCE TRANSLATION FUNCTIONS FOR API
//
/**
* APIMethod: getLonLatFromPixel
*
* Parameters:
* px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
* a 'x' and 'y' properties.
*
* Returns:
* {<OpenLayers.LonLat>} An OpenLayers.LonLat corresponding to the given
* OpenLayers.Pixel, translated into lon/lat by the
* current base layer
*/
getLonLatFromPixel: function (px) {
return this.getLonLatFromViewPortPx(px);
},
/**
* APIMethod: getPixelFromLonLat
* Returns a pixel location given a map location. The map location is
* translated to an integer pixel location (in viewport pixel
* coordinates) by the current base layer.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>} A map location.
*
* Returns:
* {<OpenLayers.Pixel>} An OpenLayers.Pixel corresponding to the
* <OpenLayers.LonLat> translated into view port pixels by the current
* base layer.
*/
getPixelFromLonLat: function (lonlat) {
var px = this.getViewPortPxFromLonLat(lonlat);
px.x = Math.round(px.x);
px.y = Math.round(px.y);
return px;
},
/**
* Method: getGeodesicPixelSize
*
* Parameters:
* px - {<OpenLayers.Pixel>} The pixel to get the geodesic length for. If
* not provided, the center pixel of the map viewport will be used.
*
* Returns:
* {<OpenLayers.Size>} The geodesic size of the pixel in kilometers.
*/
getGeodesicPixelSize: function(px) {
var lonlat = px ? this.getLonLatFromPixel(px) : (
this.getCachedCenter() || new OpenLayers.LonLat(0, 0));
var res = this.getResolution();
var left = lonlat.add(-res / 2, 0);
var right = lonlat.add(res / 2, 0);
var bottom = lonlat.add(0, -res / 2);
var top = lonlat.add(0, res / 2);
var dest = new OpenLayers.Projection("EPSG:4326");
var source = this.getProjectionObject() || dest;
if(!source.equals(dest)) {
left.transform(source, dest);
right.transform(source, dest);
bottom.transform(source, dest);
top.transform(source, dest);
}
return new OpenLayers.Size(
OpenLayers.Util.distVincenty(left, right),
OpenLayers.Util.distVincenty(bottom, top)
);
},
//
// TRANSLATION: ViewPortPx <-> LayerPx
//
/**
* APIMethod: getViewPortPxFromLayerPx
*
* Parameters:
* layerPx - {<OpenLayers.Pixel>}
*
* Returns:
* {<OpenLayers.Pixel>} Layer Pixel translated into ViewPort Pixel
* coordinates
*/
getViewPortPxFromLayerPx:function(layerPx) {
var viewPortPx = null;
if (layerPx != null) {
var dX = this.layerContainerOriginPx.x;
var dY = this.layerContainerOriginPx.y;
viewPortPx = layerPx.add(dX, dY);
}
return viewPortPx;
},
/**
* APIMethod: getLayerPxFromViewPortPx
*
* Parameters:
* viewPortPx - {<OpenLayers.Pixel>}
*
* Returns:
* {<OpenLayers.Pixel>} ViewPort Pixel translated into Layer Pixel
* coordinates
*/
getLayerPxFromViewPortPx:function(viewPortPx) {
var layerPx = null;
if (viewPortPx != null) {
var dX = -this.layerContainerOriginPx.x;
var dY = -this.layerContainerOriginPx.y;
layerPx = viewPortPx.add(dX, dY);
if (isNaN(layerPx.x) || isNaN(layerPx.y)) {
layerPx = null;
}
}
return layerPx;
},
//
// TRANSLATION: LonLat <-> LayerPx
//
/**
* Method: getLonLatFromLayerPx
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*
* Returns:
* {<OpenLayers.LonLat>}
*/
getLonLatFromLayerPx: function (px) {
//adjust for displacement of layerContainerDiv
px = this.getViewPortPxFromLayerPx(px);
return this.getLonLatFromViewPortPx(px);
},
/**
* APIMethod: getLayerPxFromLonLat
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>} lonlat
*
* Returns:
* {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in
* <OpenLayers.LonLat>, translated into layer pixels
* by the current base layer
*/
getLayerPxFromLonLat: function (lonlat) {
//adjust for displacement of layerContainerDiv
var px = this.getPixelFromLonLat(lonlat);
return this.getLayerPxFromViewPortPx(px);
},
/**
* Method: applyTransform
* Applies the given transform to the <layerContainerDiv>. This method has
* a 2-stage fallback from translate3d/scale3d via translate/scale to plain
* style.left/style.top, in which case no scaling is supported.
*
* Parameters:
* x - {Number} x parameter for the translation. Defaults to the x value of
* the map's <layerContainerOriginPx>
* y - {Number} y parameter for the translation. Defaults to the y value of
* the map's <layerContainerOriginPx>
* scale - {Number} scale. Defaults to 1 if not provided.
*/
applyTransform: function(x, y, scale) {
scale = scale || 1;
var origin = this.layerContainerOriginPx,
needTransform = scale !== 1;
x = x || origin.x;
y = y || origin.y;
var style = this.layerContainerDiv.style,
transform = this.applyTransform.transform,
template = this.applyTransform.template;
if (transform === undefined) {
transform = OpenLayers.Util.vendorPrefix.style('transform');
this.applyTransform.transform = transform;
if (transform) {
// Try translate3d, but only if the viewPortDiv has a transform
// defined in a stylesheet
var computedStyle = OpenLayers.Element.getStyle(this.viewPortDiv,
OpenLayers.Util.vendorPrefix.css('transform'));
if (!computedStyle || computedStyle !== 'none') {
template = ['translate3d(', ',0) ', 'scale3d(', ',1)'];
style[transform] = [template[0], '0,0', template[1]].join('');
}
// If no transform is defined in the stylesheet or translate3d
// does not stick, use translate and scale
if (!template || !~style[transform].indexOf(template[0])) {
template = ['translate(', ') ', 'scale(', ')'];
}
this.applyTransform.template = template;
}
}
// If we do 3d transforms, we always want to use them. If we do 2d
// transforms, we only use them when we need to.
if (transform !== null && (template[0] === 'translate3d(' || needTransform === true)) {
// Our 2d transforms are combined with style.left and style.top, so
// adjust x and y values and set the origin as left and top
if (needTransform === true && template[0] === 'translate(') {
x -= origin.x;
y -= origin.y;
style.left = origin.x + 'px';
style.top = origin.y + 'px';
}
style[transform] = [
template[0], x, 'px,', y, 'px', template[1],
template[2], scale, ',', scale, template[3]
].join('');
} else {
style.left = x + 'px';
style.top = y + 'px';
// We previously might have had needTransform, so remove transform
if (transform !== null) {
style[transform] = '';
}
}
},
CLASS_NAME: "OpenLayers.Map"
});
/**
* Constant: TILE_WIDTH
* {Integer} 256 Default tile width (unless otherwise specified)
*/
OpenLayers.Map.TILE_WIDTH = 256;
/**
* Constant: TILE_HEIGHT
* {Integer} 256 Default tile height (unless otherwise specified)
*/
OpenLayers.Map.TILE_HEIGHT = 256;
/* ======================================================================
OpenLayers/Layer.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Map.js
* @requires OpenLayers/Projection.js
*/
/**
* Class: OpenLayers.Layer
*/
OpenLayers.Layer = OpenLayers.Class({
/**
* APIProperty: id
* {String}
*/
id: null,
/**
* APIProperty: name
* {String}
*/
name: null,
/**
* APIProperty: div
* {DOMElement}
*/
div: null,
/**
* APIProperty: opacity
* {Float} The layer's opacity. Float number between 0.0 and 1.0. Default
* is 1.
*/
opacity: 1,
/**
* APIProperty: alwaysInRange
* {Boolean} If a layer's display should not be scale-based, this should
* be set to true. This will cause the layer, as an overlay, to always
* be 'active', by always returning true from the calculateInRange()
* function.
*
* If not explicitly specified for a layer, its value will be
* determined on startup in initResolutions() based on whether or not
* any scale-specific properties have been set as options on the
* layer. If no scale-specific options have been set on the layer, we
* assume that it should always be in range.
*
* See #987 for more info.
*/
alwaysInRange: null,
/**
* Constant: RESOLUTION_PROPERTIES
* {Array} The properties that are used for calculating resolutions
* information.
*/
RESOLUTION_PROPERTIES: [
'scales', 'resolutions',
'maxScale', 'minScale',
'maxResolution', 'minResolution',
'numZoomLevels', 'maxZoomLevel'
],
/**
* APIProperty: events
* {<OpenLayers.Events>}
*
* Register a listener for a particular event with the following syntax:
* (code)
* layer.events.register(type, obj, listener);
* (end)
*
* Listeners will be called with a reference to an event object. The
* properties of this event depends on exactly what happened.
*
* All event objects have at least the following properties:
* object - {Object} A reference to layer.events.object.
* element - {DOMElement} A reference to layer.events.element.
*
* Supported map event types:
* loadstart - Triggered when layer loading starts. When using a Vector
* layer with a Fixed or BBOX strategy, the event object includes
* a *filter* property holding the OpenLayers.Filter used when
* calling read on the protocol.
* loadend - Triggered when layer loading ends. When using a Vector layer
* with a Fixed or BBOX strategy, the event object includes a
* *response* property holding an OpenLayers.Protocol.Response object.
* visibilitychanged - Triggered when the layer's visibility property is
* changed, e.g. by turning the layer on or off in the layer switcher.
* Note that the actual visibility of the layer can also change if it
* gets out of range (see <calculateInRange>). If you also want to catch
* these cases, register for the map's 'changelayer' event instead.
* move - Triggered when layer moves (triggered with every mousemove
* during a drag).
* moveend - Triggered when layer is done moving, object passed as
* argument has a zoomChanged boolean property which tells that the
* zoom has changed.
* added - Triggered after the layer is added to a map. Listeners will
* receive an object with a *map* property referencing the map and a
* *layer* property referencing the layer.
* removed - Triggered after the layer is removed from the map. Listeners
* will receive an object with a *map* property referencing the map and
* a *layer* property referencing the layer.
*/
events: null,
/**
* APIProperty: map
* {<OpenLayers.Map>} This variable is set when the layer is added to
* the map, via the accessor function setMap().
*/
map: null,
/**
* APIProperty: isBaseLayer
* {Boolean} Whether or not the layer is a base layer. This should be set
* individually by all subclasses. Default is false
*/
isBaseLayer: false,
/**
* Property: alpha
* {Boolean} The layer's images have an alpha channel. Default is false.
*/
alpha: false,
/**
* APIProperty: displayInLayerSwitcher
* {Boolean} Display the layer's name in the layer switcher. Default is
* true.
*/
displayInLayerSwitcher: true,
/**
* APIProperty: visibility
* {Boolean} The layer should be displayed in the map. Default is true.
*/
visibility: true,
/**
* APIProperty: attribution
* {String} Attribution string, displayed when an
* <OpenLayers.Control.Attribution> has been added to the map.
*/
attribution: null,
/**
* Property: inRange
* {Boolean} The current map resolution is within the layer's min/max
* range. This is set in <OpenLayers.Map.setCenter> whenever the zoom
* changes.
*/
inRange: false,
/**
* Propery: imageSize
* {<OpenLayers.Size>} For layers with a gutter, the image is larger than
* the tile by twice the gutter in each dimension.
*/
imageSize: null,
// OPTIONS
/**
* Property: options
* {Object} An optional object whose properties will be set on the layer.
* Any of the layer properties can be set as a property of the options
* object and sent to the constructor when the layer is created.
*/
options: null,
/**
* APIProperty: eventListeners
* {Object} If set as an option at construction, the eventListeners
* object will be registered with <OpenLayers.Events.on>. Object
* structure must be a listeners object as shown in the example for
* the events.on method.
*/
eventListeners: null,
/**
* APIProperty: gutter
* {Integer} Determines the width (in pixels) of the gutter around image
* tiles to ignore. By setting this property to a non-zero value,
* images will be requested that are wider and taller than the tile
* size by a value of 2 x gutter. This allows artifacts of rendering
* at tile edges to be ignored. Set a gutter value that is equal to
* half the size of the widest symbol that needs to be displayed.
* Defaults to zero. Non-tiled layers always have zero gutter.
*/
gutter: 0,
/**
* APIProperty: projection
* {<OpenLayers.Projection>} or {<String>} Specifies the projection of the layer.
* Can be set in the layer options. If not specified in the layer options,
* it is set to the default projection specified in the map,
* when the layer is added to the map.
* Projection along with default maxExtent and resolutions
* are set automatically with commercial baselayers in EPSG:3857,
* such as Google, Bing and OpenStreetMap, and do not need to be specified.
* Otherwise, if specifying projection, also set maxExtent,
* maxResolution or resolutions as appropriate.
* When using vector layers with strategies, layer projection should be set
* to the projection of the source data if that is different from the map default.
*
* Can be either a string or an <OpenLayers.Projection> object;
* if a string is passed, will be converted to an object when
* the layer is added to the map.
*
*/
projection: null,
/**
* APIProperty: units
* {String} The layer map units. Defaults to null. Possible values
* are 'degrees' (or 'dd'), 'm', 'ft', 'km', 'mi', 'inches'.
* Normally taken from the projection.
* Only required if both map and layers do not define a projection,
* or if they define a projection which does not define units.
*/
units: null,
/**
* APIProperty: scales
* {Array} An array of map scales in descending order. The values in the
* array correspond to the map scale denominator. Note that these
* values only make sense if the display (monitor) resolution of the
* client is correctly guessed by whomever is configuring the
* application. In addition, the units property must also be set.
* Use <resolutions> instead wherever possible.
*/
scales: null,
/**
* APIProperty: resolutions
* {Array} A list of map resolutions (map units per pixel) in descending
* order. If this is not set in the layer constructor, it will be set
* based on other resolution related properties (maxExtent,
* maxResolution, maxScale, etc.).
*/
resolutions: null,
/**
* APIProperty: maxExtent
* {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* The maximum extent for the layer. Defaults to null.
*
* The center of these bounds will not stray outside
* of the viewport extent during panning. In addition, if
* <displayOutsideMaxExtent> is set to false, data will not be
* requested that falls completely outside of these bounds.
*/
maxExtent: null,
/**
* APIProperty: minExtent
* {<OpenLayers.Bounds>|Array} If provided as an array, the array
* should consist of four values (left, bottom, right, top).
* The minimum extent for the layer. Defaults to null.
*/
minExtent: null,
/**
* APIProperty: maxResolution
* {Float} Default max is 360 deg / 256 px, which corresponds to
* zoom level 0 on gmaps. Specify a different value in the layer
* options if you are not using the default <OpenLayers.Map.tileSize>
* and displaying the whole world.
*/
maxResolution: null,
/**
* APIProperty: minResolution
* {Float}
*/
minResolution: null,
/**
* APIProperty: numZoomLevels
* {Integer}
*/
numZoomLevels: null,
/**
* APIProperty: minScale
* {Float}
*/
minScale: null,
/**
* APIProperty: maxScale
* {Float}
*/
maxScale: null,
/**
* APIProperty: displayOutsideMaxExtent
* {Boolean} Request map tiles that are completely outside of the max
* extent for this layer. Defaults to false.
*/
displayOutsideMaxExtent: false,
/**
* APIProperty: wrapDateLine
* {Boolean} Wraps the world at the international dateline, so the map can
* be panned infinitely in longitudinal direction. Only use this on the
* base layer, and only if the layer's maxExtent equals the world bounds.
* #487 for more info.
*/
wrapDateLine: false,
/**
* Property: metadata
* {Object} This object can be used to store additional information on a
* layer object.
*/
metadata: null,
/**
* Constructor: OpenLayers.Layer
*
* Parameters:
* name - {String} The layer name
* options - {Object} Hashtable of extra options to tag onto the layer
*/
initialize: function(name, options) {
this.metadata = {};
options = OpenLayers.Util.extend({}, options);
// make sure we respect alwaysInRange if set on the prototype
if (this.alwaysInRange != null) {
options.alwaysInRange = this.alwaysInRange;
}
this.addOptions(options);
this.name = name;
if (this.id == null) {
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
this.div = OpenLayers.Util.createDiv(this.id);
this.div.style.width = "100%";
this.div.style.height = "100%";
this.div.dir = "ltr";
this.events = new OpenLayers.Events(this, this.div);
if(this.eventListeners instanceof Object) {
this.events.on(this.eventListeners);
}
}
},
/**
* Method: destroy
* Destroy is a destructor: this is to alleviate cyclic references which
* the Javascript garbage cleaner can not take care of on its own.
*
* Parameters:
* setNewBaseLayer - {Boolean} Set a new base layer when this layer has
* been destroyed. Default is true.
*/
destroy: function(setNewBaseLayer) {
if (setNewBaseLayer == null) {
setNewBaseLayer = true;
}
if (this.map != null) {
this.map.removeLayer(this, setNewBaseLayer);
}
this.projection = null;
this.map = null;
this.name = null;
this.div = null;
this.options = null;
if (this.events) {
if(this.eventListeners) {
this.events.un(this.eventListeners);
}
this.events.destroy();
}
this.eventListeners = null;
this.events = null;
},
/**
* Method: clone
*
* Parameters:
* obj - {<OpenLayers.Layer>} The layer to be cloned
*
* Returns:
* {<OpenLayers.Layer>} An exact clone of this <OpenLayers.Layer>
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer(this.name, this.getOptions());
}
// catch any randomly tagged-on properties
OpenLayers.Util.applyDefaults(obj, this);
// a cloned layer should never have its map property set
// because it has not been added to a map yet.
obj.map = null;
return obj;
},
/**
* Method: getOptions
* Extracts an object from the layer with the properties that were set as
* options, but updates them with the values currently set on the
* instance.
*
* Returns:
* {Object} the <options> of the layer, representing the current state.
*/
getOptions: function() {
var options = {};
for(var o in this.options) {
options[o] = this[o];
}
return options;
},
/**
* APIMethod: setName
* Sets the new layer name for this layer. Can trigger a changelayer event
* on the map.
*
* Parameters:
* newName - {String} The new name.
*/
setName: function(newName) {
if (newName != this.name) {
this.name = newName;
if (this.map != null) {
this.map.events.triggerEvent("changelayer", {
layer: this,
property: "name"
});
}
}
},
/**
* APIMethod: addOptions
*
* Parameters:
* newOptions - {Object}
* reinitialize - {Boolean} If set to true, and if resolution options of the
* current baseLayer were changed, the map will be recentered to make
* sure that it is displayed with a valid resolution, and a
* changebaselayer event will be triggered.
*/
addOptions: function (newOptions, reinitialize) {
if (this.options == null) {
this.options = {};
}
if (newOptions) {
// make sure this.projection references a projection object
if(typeof newOptions.projection == "string") {
newOptions.projection = new OpenLayers.Projection(newOptions.projection);
}
if (newOptions.projection) {
// get maxResolution, units and maxExtent from projection defaults if
// they are not defined already
OpenLayers.Util.applyDefaults(newOptions,
OpenLayers.Projection.defaults[newOptions.projection.getCode()]);
}
// allow array for extents
if (newOptions.maxExtent && !(newOptions.maxExtent instanceof OpenLayers.Bounds)) {
newOptions.maxExtent = new OpenLayers.Bounds(newOptions.maxExtent);
}
if (newOptions.minExtent && !(newOptions.minExtent instanceof OpenLayers.Bounds)) {
newOptions.minExtent = new OpenLayers.Bounds(newOptions.minExtent);
}
}
// update our copy for clone
OpenLayers.Util.extend(this.options, newOptions);
// add new options to this
OpenLayers.Util.extend(this, newOptions);
// get the units from the projection, if we have a projection
// and it it has units
if(this.projection && this.projection.getUnits()) {
this.units = this.projection.getUnits();
}
// re-initialize resolutions if necessary, i.e. if any of the
// properties of the "properties" array defined below is set
// in the new options
if(this.map) {
// store current resolution so we can try to restore it later
var resolution = this.map.getResolution();
var properties = this.RESOLUTION_PROPERTIES.concat(
["projection", "units", "minExtent", "maxExtent"]
);
for(var o in newOptions) {
if(newOptions.hasOwnProperty(o) &&
OpenLayers.Util.indexOf(properties, o) >= 0) {
this.initResolutions();
if (reinitialize && this.map.baseLayer === this) {
// update map position, and restore previous resolution
this.map.setCenter(this.map.getCenter(),
this.map.getZoomForResolution(resolution),
false, true
);
// trigger a changebaselayer event to make sure that
// all controls (especially
// OpenLayers.Control.PanZoomBar) get notified of the
// new options
this.map.events.triggerEvent("changebaselayer", {
layer: this
});
}
break;
}
}
}
},
/**
* APIMethod: onMapResize
* This function can be implemented by subclasses
*/
onMapResize: function() {
//this function can be implemented by subclasses
},
/**
* APIMethod: redraw
* Redraws the layer. Returns true if the layer was redrawn, false if not.
*
* Returns:
* {Boolean} The layer was redrawn.
*/
redraw: function() {
var redrawn = false;
if (this.map) {
// min/max Range may have changed
this.inRange = this.calculateInRange();
// map's center might not yet be set
var extent = this.getExtent();
if (extent && this.inRange && this.visibility) {
var zoomChanged = true;
this.moveTo(extent, zoomChanged, false);
this.events.triggerEvent("moveend",
{"zoomChanged": zoomChanged});
redrawn = true;
}
}
return redrawn;
},
/**
* Method: moveTo
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
* zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
* do some init work in that case.
* dragging - {Boolean}
*/
moveTo:function(bounds, zoomChanged, dragging) {
var display = this.visibility;
if (!this.isBaseLayer) {
display = display && this.inRange;
}
this.display(display);
},
/**
* Method: moveByPx
* Move the layer based on pixel vector. To be implemented by subclasses.
*
* Parameters:
* dx - {Number} The x coord of the displacement vector.
* dy - {Number} The y coord of the displacement vector.
*/
moveByPx: function(dx, dy) {
},
/**
* Method: setMap
* Set the map property for the layer. This is done through an accessor
* so that subclasses can override this and take special action once
* they have their map variable set.
*
* Here we take care to bring over any of the necessary default
* properties from the map.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
if (this.map == null) {
this.map = map;
// grab some essential layer data from the map if it hasn't already
// been set
this.maxExtent = this.maxExtent || this.map.maxExtent;
this.minExtent = this.minExtent || this.map.minExtent;
this.projection = this.projection || this.map.projection;
if (typeof this.projection == "string") {
this.projection = new OpenLayers.Projection(this.projection);
}
// Check the projection to see if we can get units -- if not, refer
// to properties.
this.units = this.projection.getUnits() ||
this.units || this.map.units;
this.initResolutions();
if (!this.isBaseLayer) {
this.inRange = this.calculateInRange();
var show = ((this.visibility) && (this.inRange));
this.div.style.display = show ? "" : "none";
}
// deal with gutters
this.setTileSize();
}
},
/**
* Method: afterAdd
* Called at the end of the map.addLayer sequence. At this point, the map
* will have a base layer. To be overridden by subclasses.
*/
afterAdd: function() {
},
/**
* APIMethod: removeMap
* Just as setMap() allows each layer the possibility to take a
* personalized action on being added to the map, removeMap() allows
* each layer to take a personalized action on being removed from it.
* For now, this will be mostly unused, except for the EventPane layer,
* which needs this hook so that it can remove the special invisible
* pane.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
removeMap: function(map) {
//to be overridden by subclasses
},
/**
* APIMethod: getImageSize
*
* Parameters:
* bounds - {<OpenLayers.Bounds>} optional tile bounds, can be used
* by subclasses that have to deal with different tile sizes at the
* layer extent edges (e.g. Zoomify)
*
* Returns:
* {<OpenLayers.Size>} The size that the image should be, taking into
* account gutters.
*/
getImageSize: function(bounds) {
return (this.imageSize || this.tileSize);
},
/**
* APIMethod: setTileSize
* Set the tile size based on the map size. This also sets layer.imageSize
* or use by Tile.Image.
*
* Parameters:
* size - {<OpenLayers.Size>}
*/
setTileSize: function(size) {
var tileSize = (size) ? size :
((this.tileSize) ? this.tileSize :
this.map.getTileSize());
this.tileSize = tileSize;
if(this.gutter) {
// layers with gutters need non-null tile sizes
//if(tileSize == null) {
// OpenLayers.console.error("Error in layer.setMap() for " +
// this.name + ": layers with " +
// "gutters need non-null tile sizes");
//}
this.imageSize = new OpenLayers.Size(tileSize.w + (2*this.gutter),
tileSize.h + (2*this.gutter));
}
},
/**
* APIMethod: getVisibility
*
* Returns:
* {Boolean} The layer should be displayed (if in range).
*/
getVisibility: function() {
return this.visibility;
},
/**
* APIMethod: setVisibility
* Set the visibility flag for the layer and hide/show & redraw
* accordingly. Fire event unless otherwise specified
*
* Note that visibility is no longer simply whether or not the layer's
* style.display is set to "block". Now we store a 'visibility' state
* property on the layer class, this allows us to remember whether or
* not we *desire* for a layer to be visible. In the case where the
* map's resolution is out of the layer's range, this desire may be
* subverted.
*
* Parameters:
* visibility - {Boolean} Whether or not to display the layer (if in range)
*/
setVisibility: function(visibility) {
if (visibility != this.visibility) {
this.visibility = visibility;
this.display(visibility);
this.redraw();
if (this.map != null) {
this.map.events.triggerEvent("changelayer", {
layer: this,
property: "visibility"
});
}
this.events.triggerEvent("visibilitychanged");
}
},
/**
* APIMethod: display
* Hide or show the Layer. This is designed to be used internally, and
* is not generally the way to enable or disable the layer. For that,
* use the setVisibility function instead..
*
* Parameters:
* display - {Boolean}
*/
display: function(display) {
if (display != (this.div.style.display != "none")) {
this.div.style.display = (display && this.calculateInRange()) ? "block" : "none";
}
},
/**
* APIMethod: calculateInRange
*
* Returns:
* {Boolean} The layer is displayable at the current map's current
* resolution. Note that if 'alwaysInRange' is true for the layer,
* this function will always return true.
*/
calculateInRange: function() {
var inRange = false;
if (this.alwaysInRange) {
inRange = true;
} else {
if (this.map) {
var resolution = this.map.getResolution();
inRange = ( (resolution >= this.minResolution) &&
(resolution <= this.maxResolution) );
}
}
return inRange;
},
/**
* APIMethod: setIsBaseLayer
*
* Parameters:
* isBaseLayer - {Boolean}
*/
setIsBaseLayer: function(isBaseLayer) {
if (isBaseLayer != this.isBaseLayer) {
this.isBaseLayer = isBaseLayer;
if (this.map != null) {
this.map.events.triggerEvent("changebaselayer", {
layer: this
});
}
}
},
/********************************************************/
/* */
/* Baselayer Functions */
/* */
/********************************************************/
/**
* Method: initResolutions
* This method's responsibility is to set up the 'resolutions' array
* for the layer -- this array is what the layer will use to interface
* between the zoom levels of the map and the resolution display
* of the layer.
*
* The user has several options that determine how the array is set up.
*
* For a detailed explanation, see the following wiki from the
* openlayers.org homepage:
* http://trac.openlayers.org/wiki/SettingZoomLevels
*/
initResolutions: function() {
// ok we want resolutions, here's our strategy:
//
// 1. if resolutions are defined in the layer config, use them
// 2. else, if scales are defined in the layer config then derive
// resolutions from these scales
// 3. else, attempt to calculate resolutions from maxResolution,
// minResolution, numZoomLevels, maxZoomLevel set in the
// layer config
// 4. if we still don't have resolutions, and if resolutions
// are defined in the same, use them
// 5. else, if scales are defined in the map then derive
// resolutions from these scales
// 6. else, attempt to calculate resolutions from maxResolution,
// minResolution, numZoomLevels, maxZoomLevel set in the
// map
// 7. hope for the best!
var i, len, p;
var props = {}, alwaysInRange = true;
// get resolution data from layer config
// (we also set alwaysInRange in the layer as appropriate)
for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
p = this.RESOLUTION_PROPERTIES[i];
props[p] = this.options[p];
if(alwaysInRange && this.options[p]) {
alwaysInRange = false;
}
}
if(this.options.alwaysInRange == null) {
this.alwaysInRange = alwaysInRange;
}
// if we don't have resolutions then attempt to derive them from scales
if(props.resolutions == null) {
props.resolutions = this.resolutionsFromScales(props.scales);
}
// if we still don't have resolutions then attempt to calculate them
if(props.resolutions == null) {
props.resolutions = this.calculateResolutions(props);
}
// if we couldn't calculate resolutions then we look at we have
// in the map
if(props.resolutions == null) {
for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
p = this.RESOLUTION_PROPERTIES[i];
props[p] = this.options[p] != null ?
this.options[p] : this.map[p];
}
if(props.resolutions == null) {
props.resolutions = this.resolutionsFromScales(props.scales);
}
if(props.resolutions == null) {
props.resolutions = this.calculateResolutions(props);
}
}
// ok, we new need to set properties in the instance
// get maxResolution from the config if it's defined there
var maxResolution;
if(this.options.maxResolution &&
this.options.maxResolution !== "auto") {
maxResolution = this.options.maxResolution;
}
if(this.options.minScale) {
maxResolution = OpenLayers.Util.getResolutionFromScale(
this.options.minScale, this.units);
}
// get minResolution from the config if it's defined there
var minResolution;
if(this.options.minResolution &&
this.options.minResolution !== "auto") {
minResolution = this.options.minResolution;
}
if(this.options.maxScale) {
minResolution = OpenLayers.Util.getResolutionFromScale(
this.options.maxScale, this.units);
}
if(props.resolutions) {
//sort resolutions array descendingly
props.resolutions.sort(function(a, b) {
return (b - a);
});
// if we still don't have a maxResolution get it from the
// resolutions array
if(!maxResolution) {
maxResolution = props.resolutions[0];
}
// if we still don't have a minResolution get it from the
// resolutions array
if(!minResolution) {
var lastIdx = props.resolutions.length - 1;
minResolution = props.resolutions[lastIdx];
}
}
this.resolutions = props.resolutions;
if(this.resolutions) {
len = this.resolutions.length;
this.scales = new Array(len);
for(i=0; i<len; i++) {
this.scales[i] = OpenLayers.Util.getScaleFromResolution(
this.resolutions[i], this.units);
}
this.numZoomLevels = len;
}
this.minResolution = minResolution;
if(minResolution) {
this.maxScale = OpenLayers.Util.getScaleFromResolution(
minResolution, this.units);
}
this.maxResolution = maxResolution;
if(maxResolution) {
this.minScale = OpenLayers.Util.getScaleFromResolution(
maxResolution, this.units);
}
},
/**
* Method: resolutionsFromScales
* Derive resolutions from scales.
*
* Parameters:
* scales - {Array(Number)} Scales
*
* Returns
* {Array(Number)} Resolutions
*/
resolutionsFromScales: function(scales) {
if(scales == null) {
return;
}
var resolutions, i, len;
len = scales.length;
resolutions = new Array(len);
for(i=0; i<len; i++) {
resolutions[i] = OpenLayers.Util.getResolutionFromScale(
scales[i], this.units);
}
return resolutions;
},
/**
* Method: calculateResolutions
* Calculate resolutions based on the provided properties.
*
* Parameters:
* props - {Object} Properties
*
* Returns:
* {Array({Number})} Array of resolutions.
*/
calculateResolutions: function(props) {
var viewSize, wRes, hRes;
// determine maxResolution
var maxResolution = props.maxResolution;
if(props.minScale != null) {
maxResolution =
OpenLayers.Util.getResolutionFromScale(props.minScale,
this.units);
} else if(maxResolution == "auto" && this.maxExtent != null) {
viewSize = this.map.getSize();
wRes = this.maxExtent.getWidth() / viewSize.w;
hRes = this.maxExtent.getHeight() / viewSize.h;
maxResolution = Math.max(wRes, hRes);
}
// determine minResolution
var minResolution = props.minResolution;
if(props.maxScale != null) {
minResolution =
OpenLayers.Util.getResolutionFromScale(props.maxScale,
this.units);
} else if(props.minResolution == "auto" && this.minExtent != null) {
viewSize = this.map.getSize();
wRes = this.minExtent.getWidth() / viewSize.w;
hRes = this.minExtent.getHeight()/ viewSize.h;
minResolution = Math.max(wRes, hRes);
}
if(typeof maxResolution !== "number" &&
typeof minResolution !== "number" &&
this.maxExtent != null) {
// maxResolution for default grid sets assumes that at zoom
// level zero, the whole world fits on one tile.
var tileSize = this.map.getTileSize();
maxResolution = Math.max(
this.maxExtent.getWidth() / tileSize.w,
this.maxExtent.getHeight() / tileSize.h
);
}
// determine numZoomLevels
var maxZoomLevel = props.maxZoomLevel;
var numZoomLevels = props.numZoomLevels;
if(typeof minResolution === "number" &&
typeof maxResolution === "number" && numZoomLevels === undefined) {
var ratio = maxResolution / minResolution;
numZoomLevels = Math.floor(Math.log(ratio) / Math.log(2)) + 1;
} else if(numZoomLevels === undefined && maxZoomLevel != null) {
numZoomLevels = maxZoomLevel + 1;
}
// are we able to calculate resolutions?
if(typeof numZoomLevels !== "number" || numZoomLevels <= 0 ||
(typeof maxResolution !== "number" &&
typeof minResolution !== "number")) {
return;
}
// now we have numZoomLevels and at least one of maxResolution
// or minResolution, we can populate the resolutions array
var resolutions = new Array(numZoomLevels);
var base = 2;
if(typeof minResolution == "number" &&
typeof maxResolution == "number") {
// if maxResolution and minResolution are set, we calculate
// the base for exponential scaling that starts at
// maxResolution and ends at minResolution in numZoomLevels
// steps.
base = Math.pow(
(maxResolution / minResolution),
(1 / (numZoomLevels - 1))
);
}
var i;
if(typeof maxResolution === "number") {
for(i=0; i<numZoomLevels; i++) {
resolutions[i] = maxResolution / Math.pow(base, i);
}
} else {
for(i=0; i<numZoomLevels; i++) {
resolutions[numZoomLevels - 1 - i] =
minResolution * Math.pow(base, i);
}
}
return resolutions;
},
/**
* APIMethod: getResolution
*
* Returns:
* {Float} The currently selected resolution of the map, taken from the
* resolutions array, indexed by current zoom level.
*/
getResolution: function() {
var zoom = this.map.getZoom();
return this.getResolutionForZoom(zoom);
},
/**
* APIMethod: getExtent
*
* Returns:
* {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat
* bounds of the current viewPort.
*/
getExtent: function() {
// just use stock map calculateBounds function -- passing no arguments
// means it will user map's current center & resolution
//
return this.map.calculateBounds();
},
/**
* APIMethod: getZoomForExtent
*
* Parameters:
* extent - {<OpenLayers.Bounds>}
* closest - {Boolean} Find the zoom level that most closely fits the
* specified bounds. Note that this may result in a zoom that does
* not exactly contain the entire extent.
* Default is false.
*
* Returns:
* {Integer} The index of the zoomLevel (entry in the resolutions array)
* for the passed-in extent. We do this by calculating the ideal
* resolution for the given extent (based on the map size) and then
* calling getZoomForResolution(), passing along the 'closest'
* parameter.
*/
getZoomForExtent: function(extent, closest) {
var viewSize = this.map.getSize();
var idealResolution = Math.max( extent.getWidth() / viewSize.w,
extent.getHeight() / viewSize.h );
return this.getZoomForResolution(idealResolution, closest);
},
/**
* Method: getDataExtent
* Calculates the max extent which includes all of the data for the layer.
* This function is to be implemented by subclasses.
*
* Returns:
* {<OpenLayers.Bounds>}
*/
getDataExtent: function () {
//to be implemented by subclasses
},
/**
* APIMethod: getResolutionForZoom
*
* Parameters:
* zoom - {Float}
*
* Returns:
* {Float} A suitable resolution for the specified zoom.
*/
getResolutionForZoom: function(zoom) {
zoom = Math.max(0, Math.min(zoom, this.resolutions.length - 1));
var resolution;
if(this.map.fractionalZoom) {
var low = Math.floor(zoom);
var high = Math.ceil(zoom);
resolution = this.resolutions[low] -
((zoom-low) * (this.resolutions[low]-this.resolutions[high]));
} else {
resolution = this.resolutions[Math.round(zoom)];
}
return resolution;
},
/**
* APIMethod: getZoomForResolution
*
* Parameters:
* resolution - {Float}
* closest - {Boolean} Find the zoom level that corresponds to the absolute
* closest resolution, which may result in a zoom whose corresponding
* resolution is actually smaller than we would have desired (if this
* is being called from a getZoomForExtent() call, then this means that
* the returned zoom index might not actually contain the entire
* extent specified... but it'll be close).
* Default is false.
*
* Returns:
* {Integer} The index of the zoomLevel (entry in the resolutions array)
* that corresponds to the best fit resolution given the passed in
* value and the 'closest' specification.
*/
getZoomForResolution: function(resolution, closest) {
var zoom, i, len;
if(this.map.fractionalZoom) {
var lowZoom = 0;
var highZoom = this.resolutions.length - 1;
var highRes = this.resolutions[lowZoom];
var lowRes = this.resolutions[highZoom];
var res;
for(i=0, len=this.resolutions.length; i<len; ++i) {
res = this.resolutions[i];
if(res >= resolution) {
highRes = res;
lowZoom = i;
}
if(res <= resolution) {
lowRes = res;
highZoom = i;
break;
}
}
var dRes = highRes - lowRes;
if(dRes > 0) {
zoom = lowZoom + ((highRes - resolution) / dRes);
} else {
zoom = lowZoom;
}
} else {
var diff;
var minDiff = Number.POSITIVE_INFINITY;
for(i=0, len=this.resolutions.length; i<len; i++) {
if (closest) {
diff = Math.abs(this.resolutions[i] - resolution);
if (diff > minDiff) {
break;
}
minDiff = diff;
} else {
if (this.resolutions[i] < resolution) {
break;
}
}
}
zoom = Math.max(0, i-1);
}
return zoom;
},
/**
* APIMethod: getLonLatFromViewPortPx
*
* Parameters:
* viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
* an object with a 'x'
* and 'y' properties.
*
* Returns:
* {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in
* view port <OpenLayers.Pixel>, translated into lon/lat by the layer.
*/
getLonLatFromViewPortPx: function (viewPortPx) {
var lonlat = null;
var map = this.map;
if (viewPortPx != null && map.minPx) {
var res = map.getResolution();
var maxExtent = map.getMaxExtent({restricted: true});
var lon = (viewPortPx.x - map.minPx.x) * res + maxExtent.left;
var lat = (map.minPx.y - viewPortPx.y) * res + maxExtent.top;
lonlat = new OpenLayers.LonLat(lon, lat);
if (this.wrapDateLine) {
lonlat = lonlat.wrapDateLine(this.maxExtent);
}
}
return lonlat;
},
/**
* APIMethod: getViewPortPxFromLonLat
* Returns a pixel location given a map location. This method will return
* fractional pixel values.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>|Object} An OpenLayers.LonLat or
* an object with a 'lon'
* and 'lat' properties.
*
* Returns:
* {<OpenLayers.Pixel>} An <OpenLayers.Pixel> which is the passed-in
* lonlat translated into view port pixels.
*/
getViewPortPxFromLonLat: function (lonlat, resolution) {
var px = null;
if (lonlat != null) {
resolution = resolution || this.map.getResolution();
var extent = this.map.calculateBounds(null, resolution);
px = new OpenLayers.Pixel(
(1/resolution * (lonlat.lon - extent.left)),
(1/resolution * (extent.top - lonlat.lat))
);
}
return px;
},
/**
* APIMethod: setOpacity
* Sets the opacity for the entire layer (all images)
*
* Parameters:
* opacity - {Float}
*/
setOpacity: function(opacity) {
if (opacity != this.opacity) {
this.opacity = opacity;
var childNodes = this.div.childNodes;
for(var i = 0, len = childNodes.length; i < len; ++i) {
var element = childNodes[i].firstChild || childNodes[i];
var lastChild = childNodes[i].lastChild;
//TODO de-uglify this
if (lastChild && lastChild.nodeName.toLowerCase() === "iframe") {
element = lastChild.parentNode;
}
OpenLayers.Util.modifyDOMElement(element, null, null, null,
null, null, null, opacity);
}
if (this.map != null) {
this.map.events.triggerEvent("changelayer", {
layer: this,
property: "opacity"
});
}
}
},
/**
* Method: getZIndex
*
* Returns:
* {Integer} the z-index of this layer
*/
getZIndex: function () {
return this.div.style.zIndex;
},
/**
* Method: setZIndex
*
* Parameters:
* zIndex - {Integer}
*/
setZIndex: function (zIndex) {
this.div.style.zIndex = zIndex;
},
/**
* Method: adjustBounds
* This function will take a bounds, and if wrapDateLine option is set
* on the layer, it will return a bounds which is wrapped around the
* world. We do not wrap for bounds which *cross* the
* maxExtent.left/right, only bounds which are entirely to the left
* or entirely to the right.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*/
adjustBounds: function (bounds) {
if (this.gutter) {
// Adjust the extent of a bounds in map units by the
// layer's gutter in pixels.
var mapGutter = this.gutter * this.map.getResolution();
bounds = new OpenLayers.Bounds(bounds.left - mapGutter,
bounds.bottom - mapGutter,
bounds.right + mapGutter,
bounds.top + mapGutter);
}
if (this.wrapDateLine) {
// wrap around the date line, within the limits of rounding error
var wrappingOptions = {
'rightTolerance':this.getResolution(),
'leftTolerance':this.getResolution()
};
bounds = bounds.wrapDateLine(this.maxExtent, wrappingOptions);
}
return bounds;
},
CLASS_NAME: "OpenLayers.Layer"
});
/* ======================================================================
OpenLayers/Layer/HTTPRequest.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer.js
*/
/**
* Class: OpenLayers.Layer.HTTPRequest
*
* Inherits from:
* - <OpenLayers.Layer>
*/
OpenLayers.Layer.HTTPRequest = OpenLayers.Class(OpenLayers.Layer, {
/**
* Constant: URL_HASH_FACTOR
* {Float} Used to hash URL param strings for multi-WMS server selection.
* Set to the Golden Ratio per Knuth's recommendation.
*/
URL_HASH_FACTOR: (Math.sqrt(5) - 1) / 2,
/**
* Property: url
* {Array(String) or String} This is either an array of url strings or
* a single url string.
*/
url: null,
/**
* Property: params
* {Object} Hashtable of key/value parameters
*/
params: null,
/**
* APIProperty: reproject
* *Deprecated*. See http://docs.openlayers.org/library/spherical_mercator.html
* for information on the replacement for this functionality.
* {Boolean} Whether layer should reproject itself based on base layer
* locations. This allows reprojection onto commercial layers.
* Default is false: Most layers can't reproject, but layers
* which can create non-square geographic pixels can, like WMS.
*
*/
reproject: false,
/**
* Constructor: OpenLayers.Layer.HTTPRequest
*
* Parameters:
* name - {String}
* url - {Array(String) or String}
* params - {Object}
* options - {Object} Hashtable of extra options to tag onto the layer
*/
initialize: function(name, url, params, options) {
OpenLayers.Layer.prototype.initialize.apply(this, [name, options]);
this.url = url;
if (!this.params) {
this.params = OpenLayers.Util.extend({}, params);
}
},
/**
* APIMethod: destroy
*/
destroy: function() {
this.url = null;
this.params = null;
OpenLayers.Layer.prototype.destroy.apply(this, arguments);
},
/**
* APIMethod: clone
*
* Parameters:
* obj - {Object}
*
* Returns:
* {<OpenLayers.Layer.HTTPRequest>} An exact clone of this
* <OpenLayers.Layer.HTTPRequest>
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.HTTPRequest(this.name,
this.url,
this.params,
this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
return obj;
},
/**
* APIMethod: setUrl
*
* Parameters:
* newUrl - {String}
*/
setUrl: function(newUrl) {
this.url = newUrl;
},
/**
* APIMethod: mergeNewParams
*
* Parameters:
* newParams - {Object}
*
* Returns:
* redrawn: {Boolean} whether the layer was actually redrawn.
*/
mergeNewParams:function(newParams) {
this.params = OpenLayers.Util.extend(this.params, newParams);
var ret = this.redraw();
if(this.map != null) {
this.map.events.triggerEvent("changelayer", {
layer: this,
property: "params"
});
}
return ret;
},
/**
* APIMethod: redraw
* Redraws the layer. Returns true if the layer was redrawn, false if not.
*
* Parameters:
* force - {Boolean} Force redraw by adding random parameter.
*
* Returns:
* {Boolean} The layer was redrawn.
*/
redraw: function(force) {
if (force) {
return this.mergeNewParams({"_olSalt": Math.random()});
} else {
return OpenLayers.Layer.prototype.redraw.apply(this, []);
}
},
/**
* Method: selectUrl
* selectUrl() implements the standard floating-point multiplicative
* hash function described by Knuth, and hashes the contents of the
* given param string into a float between 0 and 1. This float is then
* scaled to the size of the provided urls array, and used to select
* a URL.
*
* Parameters:
* paramString - {String}
* urls - {Array(String)}
*
* Returns:
* {String} An entry from the urls array, deterministically selected based
* on the paramString.
*/
selectUrl: function(paramString, urls) {
var product = 1;
for (var i=0, len=paramString.length; i<len; i++) {
product *= paramString.charCodeAt(i) * this.URL_HASH_FACTOR;
product -= Math.floor(product);
}
return urls[Math.floor(product * urls.length)];
},
/**
* Method: getFullRequestString
* Combine url with layer's params and these newParams.
*
* does checking on the serverPath variable, allowing for cases when it
* is supplied with trailing ? or &, as well as cases where not.
*
* return in formatted string like this:
* "server?key1=value1&key2=value2&key3=value3"
*
* WARNING: The altUrl parameter is deprecated and will be removed in 3.0.
*
* Parameters:
* newParams - {Object}
* altUrl - {String} Use this as the url instead of the layer's url
*
* Returns:
* {String}
*/
getFullRequestString:function(newParams, altUrl) {
// if not altUrl passed in, use layer's url
var url = altUrl || this.url;
// create a new params hashtable with all the layer params and the
// new params together. then convert to string
var allParams = OpenLayers.Util.extend({}, this.params);
allParams = OpenLayers.Util.extend(allParams, newParams);
var paramsString = OpenLayers.Util.getParameterString(allParams);
// if url is not a string, it should be an array of strings,
// in which case we will deterministically select one of them in
// order to evenly distribute requests to different urls.
//
if (OpenLayers.Util.isArray(url)) {
url = this.selectUrl(paramsString, url);
}
// ignore parameters that are already in the url search string
var urlParams =
OpenLayers.Util.upperCaseObject(OpenLayers.Util.getParameters(url));
for(var key in allParams) {
if(key.toUpperCase() in urlParams) {
delete allParams[key];
}
}
paramsString = OpenLayers.Util.getParameterString(allParams);
return OpenLayers.Util.urlAppend(url, paramsString);
},
CLASS_NAME: "OpenLayers.Layer.HTTPRequest"
});
/* ======================================================================
OpenLayers/Tile.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
*/
/**
* Class: OpenLayers.Tile
* This is a class designed to designate a single tile, however
* it is explicitly designed to do relatively little. Tiles store
* information about themselves -- such as the URL that they are related
* to, and their size - but do not add themselves to the layer div
* automatically, for example. Create a new tile with the
* <OpenLayers.Tile> constructor, or a subclass.
*
* TBD 3.0 - remove reference to url in above paragraph
*
*/
OpenLayers.Tile = OpenLayers.Class({
/**
* APIProperty: events
* {<OpenLayers.Events>} An events object that handles all
* events on the tile.
*
* Register a listener for a particular event with the following syntax:
* (code)
* tile.events.register(type, obj, listener);
* (end)
*
* Supported event types:
* beforedraw - Triggered before the tile is drawn. Used to defer
* drawing to an animation queue. To defer drawing, listeners need
* to return false, which will abort drawing. The queue handler needs
* to call <draw>(true) to actually draw the tile.
* loadstart - Triggered when tile loading starts.
* loadend - Triggered when tile loading ends.
* loaderror - Triggered before the loadend event (i.e. when the tile is
* still hidden) if the tile could not be loaded.
* reload - Triggered when an already loading tile is reloaded.
* unload - Triggered before a tile is unloaded.
*/
events: null,
/**
* APIProperty: eventListeners
* {Object} If set as an option at construction, the eventListeners
* object will be registered with <OpenLayers.Events.on>. Object
* structure must be a listeners object as shown in the example for
* the events.on method.
*
* This options can be set in the ``tileOptions`` option from
* <OpenLayers.Layer.Grid>. For example, to be notified of the
* ``loadend`` event of each tiles:
* (code)
* new OpenLayers.Layer.OSM('osm', 'http://tile.openstreetmap.org/${z}/${x}/${y}.png', {
* tileOptions: {
* eventListeners: {
* 'loadend': function(evt) {
* // do something on loadend
* }
* }
* }
* });
* (end)
*/
eventListeners: null,
/**
* Property: id
* {String} null
*/
id: null,
/**
* Property: layer
* {<OpenLayers.Layer>} layer the tile is attached to
*/
layer: null,
/**
* Property: url
* {String} url of the request.
*
* TBD 3.0
* Deprecated. The base tile class does not need an url. This should be
* handled in subclasses. Does not belong here.
*/
url: null,
/**
* APIProperty: bounds
* {<OpenLayers.Bounds>} null
*/
bounds: null,
/**
* Property: size
* {<OpenLayers.Size>} null
*/
size: null,
/**
* Property: position
* {<OpenLayers.Pixel>} Top Left pixel of the tile
*/
position: null,
/**
* Property: isLoading
* {Boolean} Is the tile loading?
*/
isLoading: false,
/** TBD 3.0 -- remove 'url' from the list of parameters to the constructor.
* there is no need for the base tile class to have a url.
*/
/**
* Constructor: OpenLayers.Tile
* Constructor for a new <OpenLayers.Tile> instance.
*
* Parameters:
* layer - {<OpenLayers.Layer>} layer that the tile will go in.
* position - {<OpenLayers.Pixel>}
* bounds - {<OpenLayers.Bounds>}
* url - {<String>}
* size - {<OpenLayers.Size>}
* options - {Object}
*/
initialize: function(layer, position, bounds, url, size, options) {
this.layer = layer;
this.position = position.clone();
this.setBounds(bounds);
this.url = url;
if (size) {
this.size = size.clone();
}
//give the tile a unique id based on its BBOX.
this.id = OpenLayers.Util.createUniqueID("Tile_");
OpenLayers.Util.extend(this, options);
this.events = new OpenLayers.Events(this);
if (this.eventListeners instanceof Object) {
this.events.on(this.eventListeners);
}
},
/**
* Method: unload
* Call immediately before destroying if you are listening to tile
* events, so that counters are properly handled if tile is still
* loading at destroy-time. Will only fire an event if the tile is
* still loading.
*/
unload: function() {
if (this.isLoading) {
this.isLoading = false;
this.events.triggerEvent("unload");
}
},
/**
* APIMethod: destroy
* Nullify references to prevent circular references and memory leaks.
*/
destroy:function() {
this.layer = null;
this.bounds = null;
this.size = null;
this.position = null;
if (this.eventListeners) {
this.events.un(this.eventListeners);
}
this.events.destroy();
this.eventListeners = null;
this.events = null;
},
/**
* Method: draw
* Clear whatever is currently in the tile, then return whether or not
* it should actually be re-drawn. This is an example implementation
* that can be overridden by subclasses. The minimum thing to do here
* is to call <clear> and return the result from <shouldDraw>.
*
* Parameters:
* force - {Boolean} If true, the tile will not be cleared and no beforedraw
* event will be fired. This is used for drawing tiles asynchronously
* after drawing has been cancelled by returning false from a beforedraw
* listener.
*
* Returns:
* {Boolean} Whether or not the tile should actually be drawn. Returns null
* if a beforedraw listener returned false.
*/
draw: function(force) {
if (!force) {
//clear tile's contents and mark as not drawn
this.clear();
}
var draw = this.shouldDraw();
if (draw && !force && this.events.triggerEvent("beforedraw") === false) {
draw = null;
}
return draw;
},
/**
* Method: shouldDraw
* Return whether or not the tile should actually be (re-)drawn. The only
* case where we *wouldn't* want to draw the tile is if the tile is outside
* its layer's maxExtent
*
* Returns:
* {Boolean} Whether or not the tile should actually be drawn.
*/
shouldDraw: function() {
var withinMaxExtent = false,
maxExtent = this.layer.maxExtent;
if (maxExtent) {
var map = this.layer.map;
var worldBounds = map.baseLayer.wrapDateLine && map.getMaxExtent();
if (this.bounds.intersectsBounds(maxExtent, {inclusive: false, worldBounds: worldBounds})) {
withinMaxExtent = true;
}
}
return withinMaxExtent || this.layer.displayOutsideMaxExtent;
},
/**
* Method: setBounds
* Sets the bounds on this instance
*
* Parameters:
* bounds {<OpenLayers.Bounds>}
*/
setBounds: function(bounds) {
bounds = bounds.clone();
if (this.layer.map.baseLayer.wrapDateLine) {
var worldExtent = this.layer.map.getMaxExtent(),
tolerance = this.layer.map.getResolution();
bounds = bounds.wrapDateLine(worldExtent, {
leftTolerance: tolerance,
rightTolerance: tolerance
});
}
this.bounds = bounds;
},
/**
* Method: moveTo
* Reposition the tile.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
* position - {<OpenLayers.Pixel>}
* redraw - {Boolean} Call draw method on tile after moving.
* Default is true
*/
moveTo: function (bounds, position, redraw) {
if (redraw == null) {
redraw = true;
}
this.setBounds(bounds);
this.position = position.clone();
if (redraw) {
this.draw();
}
},
/**
* Method: clear
* Clear the tile of any bounds/position-related data so that it can
* be reused in a new location.
*/
clear: function(draw) {
// to be extended by subclasses
},
CLASS_NAME: "OpenLayers.Tile"
});
/* ======================================================================
OpenLayers/Tile/Image.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Tile.js
* @requires OpenLayers/Animation.js
* @requires OpenLayers/Util.js
*/
/**
* Class: OpenLayers.Tile.Image
* Instances of OpenLayers.Tile.Image are used to manage the image tiles
* used by various layers. Create a new image tile with the
* <OpenLayers.Tile.Image> constructor.
*
* Inherits from:
* - <OpenLayers.Tile>
*/
OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
/**
* APIProperty: events
* {<OpenLayers.Events>} An events object that handles all
* events on the tile.
*
* Register a listener for a particular event with the following syntax:
* (code)
* tile.events.register(type, obj, listener);
* (end)
*
* Supported event types (in addition to the <OpenLayers.Tile> events):
* beforeload - Triggered before an image is prepared for loading, when the
* url for the image is known already. Listeners may call <setImage> on
* the tile instance. If they do so, that image will be used and no new
* one will be created.
*/
/**
* APIProperty: url
* {String} The URL of the image being requested. No default. Filled in by
* layer.getURL() function. May be modified by loadstart listeners.
*/
url: null,
/**
* Property: imgDiv
* {HTMLImageElement} The image for this tile.
*/
imgDiv: null,
/**
* Property: frame
* {DOMElement} The image element is appended to the frame. Any gutter on
* the image will be hidden behind the frame. If no gutter is set,
* this will be null.
*/
frame: null,
/**
* Property: imageReloadAttempts
* {Integer} Attempts to load the image.
*/
imageReloadAttempts: null,
/**
* Property: layerAlphaHack
* {Boolean} True if the png alpha hack needs to be applied on the layer's div.
*/
layerAlphaHack: null,
/**
* Property: asyncRequestId
* {Integer} ID of an request to see if request is still valid. This is a
* number which increments by 1 for each asynchronous request.
*/
asyncRequestId: null,
/**
* APIProperty: maxGetUrlLength
* {Number} If set, requests that would result in GET urls with more
* characters than the number provided will be made using form-encoded
* HTTP POST. It is good practice to avoid urls that are longer than 2048
* characters.
*
* Caution:
* Older versions of Gecko based browsers (e.g. Firefox < 3.5) and most
* Opera versions do not fully support this option. On all browsers,
* transition effects are not supported if POST requests are used.
*/
maxGetUrlLength: null,
/**
* Property: canvasContext
* {CanvasRenderingContext2D} A canvas context associated with
* the tile image.
*/
canvasContext: null,
/**
* APIProperty: crossOriginKeyword
* The value of the crossorigin keyword to use when loading images. This is
* only relevant when using <getCanvasContext> for tiles from remote
* origins and should be set to either 'anonymous' or 'use-credentials'
* for servers that send Access-Control-Allow-Origin headers with their
* tiles.
*/
crossOriginKeyword: null,
/** TBD 3.0 - reorder the parameters to the init function to remove
* URL. the getUrl() function on the layer gets called on
* each draw(), so no need to specify it here.
*/
/**
* Constructor: OpenLayers.Tile.Image
* Constructor for a new <OpenLayers.Tile.Image> instance.
*
* Parameters:
* layer - {<OpenLayers.Layer>} layer that the tile will go in.
* position - {<OpenLayers.Pixel>}
* bounds - {<OpenLayers.Bounds>}
* url - {<String>} Deprecated. Remove me in 3.0.
* size - {<OpenLayers.Size>}
* options - {Object}
*/
initialize: function(layer, position, bounds, url, size, options) {
OpenLayers.Tile.prototype.initialize.apply(this, arguments);
this.url = url; //deprecated remove me
this.layerAlphaHack = this.layer.alpha && OpenLayers.Util.alphaHack();
if (this.maxGetUrlLength != null || this.layer.gutter || this.layerAlphaHack) {
// only create frame if it's needed
this.frame = document.createElement("div");
this.frame.style.position = "absolute";
this.frame.style.overflow = "hidden";
}
if (this.maxGetUrlLength != null) {
OpenLayers.Util.extend(this, OpenLayers.Tile.Image.IFrame);
}
},
/**
* APIMethod: destroy
* nullify references to prevent circular references and memory leaks
*/
destroy: function() {
if (this.imgDiv) {
this.clear();
this.imgDiv = null;
this.frame = null;
}
// don't handle async requests any more
this.asyncRequestId = null;
OpenLayers.Tile.prototype.destroy.apply(this, arguments);
},
/**
* Method: draw
* Check that a tile should be drawn, and draw it.
*
* Returns:
* {Boolean} Was a tile drawn? Or null if a beforedraw listener returned
* false.
*/
draw: function() {
var shouldDraw = OpenLayers.Tile.prototype.draw.apply(this, arguments);
if (shouldDraw) {
// The layer's reproject option is deprecated.
if (this.layer != this.layer.map.baseLayer && this.layer.reproject) {
// getBoundsFromBaseLayer is defined in deprecated.js.
this.bounds = this.getBoundsFromBaseLayer(this.position);
}
if (this.isLoading) {
//if we're already loading, send 'reload' instead of 'loadstart'.
this._loadEvent = "reload";
} else {
this.isLoading = true;
this._loadEvent = "loadstart";
}
this.renderTile();
this.positionTile();
} else if (shouldDraw === false) {
this.unload();
}
return shouldDraw;
},
/**
* Method: renderTile
* Internal function to actually initialize the image tile,
* position it correctly, and set its url.
*/
renderTile: function() {
if (this.layer.async) {
// Asynchronous image requests call the asynchronous getURL method
// on the layer to fetch an image that covers 'this.bounds'.
var id = this.asyncRequestId = (this.asyncRequestId || 0) + 1;
this.layer.getURLasync(this.bounds, function(url) {
if (id == this.asyncRequestId) {
this.url = url;
this.initImage();
}
}, this);
} else {
// synchronous image requests get the url immediately.
this.url = this.layer.getURL(this.bounds);
this.initImage();
}
},
/**
* Method: positionTile
* Using the properties currenty set on the layer, position the tile correctly.
* This method is used both by the async and non-async versions of the Tile.Image
* code.
*/
positionTile: function() {
var style = this.getTile().style,
size = this.frame ? this.size :
this.layer.getImageSize(this.bounds),
ratio = 1;
if (this.layer instanceof OpenLayers.Layer.Grid) {
ratio = this.layer.getServerResolution() / this.layer.map.getResolution();
}
style.left = this.position.x + "px";
style.top = this.position.y + "px";
style.width = Math.round(ratio * size.w) + "px";
style.height = Math.round(ratio * size.h) + "px";
},
/**
* Method: clear
* Remove the tile from the DOM, clear it of any image related data so that
* it can be reused in a new location.
*/
clear: function() {
OpenLayers.Tile.prototype.clear.apply(this, arguments);
var img = this.imgDiv;
if (img) {
var tile = this.getTile();
if (tile.parentNode === this.layer.div) {
this.layer.div.removeChild(tile);
}
this.setImgSrc();
if (this.layerAlphaHack === true) {
img.style.filter = "";
}
OpenLayers.Element.removeClass(img, "olImageLoadError");
}
this.canvasContext = null;
},
/**
* Method: getImage
* Returns or creates and returns the tile image.
*/
getImage: function() {
if (!this.imgDiv) {
this.imgDiv = OpenLayers.Tile.Image.IMAGE.cloneNode(false);
var style = this.imgDiv.style;
if (this.frame) {
var left = 0, top = 0;
if (this.layer.gutter) {
left = this.layer.gutter / this.layer.tileSize.w * 100;
top = this.layer.gutter / this.layer.tileSize.h * 100;
}
style.left = -left + "%";
style.top = -top + "%";
style.width = (2 * left + 100) + "%";
style.height = (2 * top + 100) + "%";
}
style.visibility = "hidden";
style.opacity = 0;
if (this.layer.opacity < 1) {
style.filter = 'alpha(opacity=' +
(this.layer.opacity * 100) +
')';
}
style.position = "absolute";
if (this.layerAlphaHack) {
// move the image out of sight
style.paddingTop = style.height;
style.height = "0";
style.width = "100%";
}
if (this.frame) {
this.frame.appendChild(this.imgDiv);
}
}
return this.imgDiv;
},
/**
* APIMethod: setImage
* Sets the image element for this tile. This method should only be called
* from beforeload listeners.
*
* Parameters
* img - {HTMLImageElement} The image to use for this tile.
*/
setImage: function(img) {
this.imgDiv = img;
},
/**
* Method: initImage
* Creates the content for the frame on the tile.
*/
initImage: function() {
if (!this.url && !this.imgDiv) {
// fast path out - if there is no tile url and no previous image
this.isLoading = false;
return;
}
this.events.triggerEvent('beforeload');
this.layer.div.appendChild(this.getTile());
this.events.triggerEvent(this._loadEvent);
var img = this.getImage();
var src = img.getAttribute('src') || '';
if (this.url && OpenLayers.Util.isEquivalentUrl(src, this.url)) {
this._loadTimeout = window.setTimeout(
OpenLayers.Function.bind(this.onImageLoad, this), 0
);
} else {
this.stopLoading();
if (this.crossOriginKeyword) {
img.removeAttribute("crossorigin");
}
OpenLayers.Event.observe(img, "load",
OpenLayers.Function.bind(this.onImageLoad, this)
);
OpenLayers.Event.observe(img, "error",
OpenLayers.Function.bind(this.onImageError, this)
);
this.imageReloadAttempts = 0;
this.setImgSrc(this.url);
}
},
/**
* Method: setImgSrc
* Sets the source for the tile image
*
* Parameters:
* url - {String} or undefined to hide the image
*/
setImgSrc: function(url) {
var img = this.imgDiv;
if (url) {
img.style.visibility = 'hidden';
img.style.opacity = 0;
// don't set crossOrigin if the url is a data URL
if (this.crossOriginKeyword) {
if (url.substr(0, 5) !== 'data:') {
img.setAttribute("crossorigin", this.crossOriginKeyword);
} else {
img.removeAttribute("crossorigin");
}
}
img.src = url;
} else {
// Remove reference to the image, and leave it to the browser's
// caching and garbage collection.
this.stopLoading();
this.imgDiv = null;
if (img.parentNode) {
img.parentNode.removeChild(img);
}
}
},
/**
* Method: getTile
* Get the tile's markup.
*
* Returns:
* {DOMElement} The tile's markup
*/
getTile: function() {
return this.frame ? this.frame : this.getImage();
},
/**
* Method: createBackBuffer
* Create a backbuffer for this tile. A backbuffer isn't exactly a clone
* of the tile's markup, because we want to avoid the reloading of the
* image. So we clone the frame, and steal the image from the tile.
*
* Returns:
* {DOMElement} The markup, or undefined if the tile has no image
* or if it's currently loading.
*/
createBackBuffer: function() {
if (!this.imgDiv || this.isLoading) {
return;
}
var backBuffer;
if (this.frame) {
backBuffer = this.frame.cloneNode(false);
backBuffer.appendChild(this.imgDiv);
} else {
backBuffer = this.imgDiv;
}
this.imgDiv = null;
return backBuffer;
},
/**
* Method: onImageLoad
* Handler for the image onload event
*/
onImageLoad: function() {
var img = this.imgDiv;
this.stopLoading();
img.style.visibility = 'inherit';
img.style.opacity = this.layer.opacity;
this.isLoading = false;
this.canvasContext = null;
this.events.triggerEvent("loadend");
if (this.layerAlphaHack === true) {
img.style.filter =
"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" +
img.src + "', sizingMethod='scale')";
}
},
/**
* Method: onImageError
* Handler for the image onerror event
*/
onImageError: function() {
var img = this.imgDiv;
if (img.src != null) {
this.imageReloadAttempts++;
if (this.imageReloadAttempts <= OpenLayers.IMAGE_RELOAD_ATTEMPTS) {
this.setImgSrc(this.layer.getURL(this.bounds));
} else {
OpenLayers.Element.addClass(img, "olImageLoadError");
this.events.triggerEvent("loaderror");
this.onImageLoad();
}
}
},
/**
* Method: stopLoading
* Stops a loading sequence so <onImageLoad> won't be executed.
*/
stopLoading: function() {
OpenLayers.Event.stopObservingElement(this.imgDiv);
window.clearTimeout(this._loadTimeout);
delete this._loadTimeout;
},
/**
* APIMethod: getCanvasContext
* Returns a canvas context associated with the tile image (with
* the image drawn on it).
* Returns undefined if the browser does not support canvas, if
* the tile has no image or if it's currently loading.
*
* The function returns a canvas context instance but the
* underlying canvas is still available in the 'canvas' property:
* (code)
* var context = tile.getCanvasContext();
* if (context) {
* var data = context.canvas.toDataURL('image/jpeg');
* }
* (end)
*
* Returns:
* {Boolean}
*/
getCanvasContext: function() {
if (OpenLayers.CANVAS_SUPPORTED && this.imgDiv && !this.isLoading) {
if (!this.canvasContext) {
var canvas = document.createElement("canvas");
canvas.width = this.size.w;
canvas.height = this.size.h;
this.canvasContext = canvas.getContext("2d");
this.canvasContext.drawImage(this.imgDiv, 0, 0);
}
return this.canvasContext;
}
},
CLASS_NAME: "OpenLayers.Tile.Image"
});
/**
* Constant: OpenLayers.Tile.Image.IMAGE
* {HTMLImageElement} The image for a tile.
*/
OpenLayers.Tile.Image.IMAGE = (function() {
var img = new Image();
img.className = "olTileImage";
// avoid image gallery menu in IE6
img.galleryImg = "no";
return img;
}());
/* ======================================================================
OpenLayers/Layer/Grid.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/HTTPRequest.js
* @requires OpenLayers/Tile/Image.js
*/
/**
* Class: OpenLayers.Layer.Grid
* Base class for layers that use a lattice of tiles. Create a new grid
* layer with the <OpenLayers.Layer.Grid> constructor.
*
* Inherits from:
* - <OpenLayers.Layer.HTTPRequest>
*/
OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
/**
* APIProperty: tileSize
* {<OpenLayers.Size>}
*/
tileSize: null,
/**
* Property: tileOriginCorner
* {String} If the <tileOrigin> property is not provided, the tile origin
* will be derived from the layer's <maxExtent>. The corner of the
* <maxExtent> used is determined by this property. Acceptable values
* are "tl" (top left), "tr" (top right), "bl" (bottom left), and "br"
* (bottom right). Default is "bl".
*/
tileOriginCorner: "bl",
/**
* APIProperty: tileOrigin
* {<OpenLayers.LonLat>} Optional origin for aligning the grid of tiles.
* If provided, requests for tiles at all resolutions will be aligned
* with this location (no tiles shall overlap this location). If
* not provided, the grid of tiles will be aligned with the layer's
* <maxExtent>. Default is ``null``.
*/
tileOrigin: null,
/** APIProperty: tileOptions
* {Object} optional configuration options for <OpenLayers.Tile> instances
* created by this Layer, if supported by the tile class.
*/
tileOptions: null,
/**
* APIProperty: tileClass
* {<OpenLayers.Tile>} The tile class to use for this layer.
* Defaults is OpenLayers.Tile.Image.
*/
tileClass: OpenLayers.Tile.Image,
/**
* Property: grid
* {Array(Array(<OpenLayers.Tile>))} This is an array of rows, each row is
* an array of tiles.
*/
grid: null,
/**
* APIProperty: singleTile
* {Boolean} Moves the layer into single-tile mode, meaning that one tile
* will be loaded. The tile's size will be determined by the 'ratio'
* property. When the tile is dragged such that it does not cover the
* entire viewport, it is reloaded.
*/
singleTile: false,
/** APIProperty: ratio
* {Float} Used only when in single-tile mode, this specifies the
* ratio of the size of the single tile to the size of the map.
* Default value is 1.5.
*/
ratio: 1.5,
/**
* APIProperty: buffer
* {Integer} Used only when in gridded mode, this specifies the number of
* extra rows and colums of tiles on each side which will
* surround the minimum grid tiles to cover the map.
* For very slow loading layers, a larger value may increase
* performance somewhat when dragging, but will increase bandwidth
* use significantly.
*/
buffer: 0,
/**
* APIProperty: transitionEffect
* {String} The transition effect to use when the map is zoomed.
* Two posible values:
*
* "resize" - Existing tiles are resized on zoom to provide a visual
* effect of the zoom having taken place immediately. As the
* new tiles become available, they are drawn on top of the
* resized tiles (this is the default setting).
* "map-resize" - Existing tiles are resized on zoom and placed below the
* base layer. New tiles for the base layer will cover existing tiles.
* This setting is recommended when having an overlay duplicated during
* the transition is undesirable (e.g. street labels or big transparent
* fills).
* null - No transition effect.
*
* Using "resize" on non-opaque layers can cause undesired visual
* effects. Set transitionEffect to null in this case.
*/
transitionEffect: "resize",
/**
* APIProperty: numLoadingTiles
* {Integer} How many tiles are still loading?
*/
numLoadingTiles: 0,
/**
* Property: serverResolutions
* {Array(Number}} This property is documented in subclasses as
* an API property.
*/
serverResolutions: null,
/**
* Property: loading
* {Boolean} Indicates if tiles are being loaded.
*/
loading: false,
/**
* Property: backBuffer
* {DOMElement} The back buffer.
*/
backBuffer: null,
/**
* Property: gridResolution
* {Number} The resolution of the current grid. Used for backbuffer and
* client zoom. This property is updated every time the grid is
* initialized.
*/
gridResolution: null,
/**
* Property: backBufferResolution
* {Number} The resolution of the current back buffer. This property is
* updated each time a back buffer is created.
*/
backBufferResolution: null,
/**
* Property: backBufferLonLat
* {Object} The top-left corner of the current back buffer. Includes lon
* and lat properties. This object is updated each time a back buffer
* is created.
*/
backBufferLonLat: null,
/**
* Property: backBufferTimerId
* {Number} The id of the back buffer timer. This timer is used to
* delay the removal of the back buffer, thereby preventing
* flash effects caused by tile animation.
*/
backBufferTimerId: null,
/**
* APIProperty: removeBackBufferDelay
* {Number} Delay for removing the backbuffer when all tiles have finished
* loading. Can be set to 0 when no css opacity transitions for the
* olTileImage class are used. Default is 0 for <singleTile> layers,
* 2500 for tiled layers. See <className> for more information on
* tile animation.
*/
removeBackBufferDelay: null,
/**
* APIProperty: className
* {String} Name of the class added to the layer div. If not set in the
* options passed to the constructor then className defaults to
* "olLayerGridSingleTile" for single tile layers (see <singleTile>),
* and "olLayerGrid" for non single tile layers.
*
* Note:
*
* The displaying of tiles is not animated by default for single tile
* layers - OpenLayers' default theme (style.css) includes this:
* (code)
* .olLayerGrid .olTileImage {
* -webkit-transition: opacity 0.2s linear;
* -moz-transition: opacity 0.2s linear;
* -o-transition: opacity 0.2s linear;
* transition: opacity 0.2s linear;
* }
* (end)
* To animate tile displaying for any grid layer the following
* CSS rule can be used:
* (code)
* .olTileImage {
* -webkit-transition: opacity 0.2s linear;
* -moz-transition: opacity 0.2s linear;
* -o-transition: opacity 0.2s linear;
* transition: opacity 0.2s linear;
* }
* (end)
* In that case, to avoid flash effects, <removeBackBufferDelay>
* should not be zero.
*/
className: null,
/**
* Register a listener for a particular event with the following syntax:
* (code)
* layer.events.register(type, obj, listener);
* (end)
*
* Listeners will be called with a reference to an event object. The
* properties of this event depends on exactly what happened.
*
* All event objects have at least the following properties:
* object - {Object} A reference to layer.events.object.
* element - {DOMElement} A reference to layer.events.element.
*
* Supported event types:
* addtile - Triggered when a tile is added to this layer. Listeners receive
* an object as first argument, which has a tile property that
* references the tile that has been added.
* tileloadstart - Triggered when a tile starts loading. Listeners receive
* an object as first argument, which has a tile property that
* references the tile that starts loading.
* tileloaded - Triggered when each new tile is
* loaded, as a means of progress update to listeners.
* listeners can access 'numLoadingTiles' if they wish to keep
* track of the loading progress. Listeners are called with an object
* with a 'tile' property as first argument, making the loaded tile
* available to the listener, and an 'aborted' property, which will be
* true when loading was aborted and no tile data is available.
* tileerror - Triggered before the tileloaded event (i.e. when the tile is
* still hidden) if a tile failed to load. Listeners receive an object
* as first argument, which has a tile property that references the
* tile that could not be loaded.
* retile - Triggered when the layer recreates its tile grid.
*/
/**
* Property: gridLayout
* {Object} Object containing properties tilelon, tilelat, startcol,
* startrow
*/
gridLayout: null,
/**
* Property: rowSign
* {Number} 1 for grids starting at the top, -1 for grids starting at the
* bottom. This is used for several grid index and offset calculations.
*/
rowSign: null,
/**
* Property: transitionendEvents
* {Array} Event names for transitionend
*/
transitionendEvents: [
'transitionend', 'webkitTransitionEnd', 'otransitionend',
'oTransitionEnd'
],
/**
* Constructor: OpenLayers.Layer.Grid
* Create a new grid layer
*
* Parameters:
* name - {String}
* url - {String}
* params - {Object}
* options - {Object} Hashtable of extra options to tag onto the layer
*/
initialize: function(name, url, params, options) {
OpenLayers.Layer.HTTPRequest.prototype.initialize.apply(this,
arguments);
this.grid = [];
this._removeBackBuffer = OpenLayers.Function.bind(this.removeBackBuffer, this);
this.initProperties();
this.rowSign = this.tileOriginCorner.substr(0, 1) === "t" ? 1 : -1;
},
/**
* Method: initProperties
* Set any properties that depend on the value of singleTile.
* Currently sets removeBackBufferDelay and className
*/
initProperties: function() {
if (this.options.removeBackBufferDelay === undefined) {
this.removeBackBufferDelay = this.singleTile ? 0 : 2500;
}
if (this.options.className === undefined) {
this.className = this.singleTile ? 'olLayerGridSingleTile' :
'olLayerGrid';
}
},
/**
* Method: setMap
*
* Parameters:
* map - {<OpenLayers.Map>} The map.
*/
setMap: function(map) {
OpenLayers.Layer.HTTPRequest.prototype.setMap.call(this, map);
OpenLayers.Element.addClass(this.div, this.className);
},
/**
* Method: removeMap
* Called when the layer is removed from the map.
*
* Parameters:
* map - {<OpenLayers.Map>} The map.
*/
removeMap: function(map) {
this.removeBackBuffer();
},
/**
* APIMethod: destroy
* Deconstruct the layer and clear the grid.
*/
destroy: function() {
this.removeBackBuffer();
this.clearGrid();
this.grid = null;
this.tileSize = null;
OpenLayers.Layer.HTTPRequest.prototype.destroy.apply(this, arguments);
},
/**
* APIMethod: mergeNewParams
* Refetches tiles with new params merged, keeping a backbuffer. Each
* loading new tile will have a css class of '.olTileReplacing'. If a
* stylesheet applies a 'display: none' style to that class, any fade-in
* transition will not apply, and backbuffers for each tile will be removed
* as soon as the tile is loaded.
*
* Parameters:
* newParams - {Object}
*
* Returns:
* redrawn: {Boolean} whether the layer was actually redrawn.
*/
/**
* Method: clearGrid
* Go through and remove all tiles from the grid, calling
* destroy() on each of them to kill circular references
*/
clearGrid:function() {
if (this.grid) {
for(var iRow=0, len=this.grid.length; iRow<len; iRow++) {
var row = this.grid[iRow];
for(var iCol=0, clen=row.length; iCol<clen; iCol++) {
var tile = row[iCol];
this.destroyTile(tile);
}
}
this.grid = [];
this.gridResolution = null;
this.gridLayout = null;
}
},
/**
* APIMethod: addOptions
*
* Parameters:
* newOptions - {Object}
* reinitialize - {Boolean} If set to true, and if resolution options of the
* current baseLayer were changed, the map will be recentered to make
* sure that it is displayed with a valid resolution, and a
* changebaselayer event will be triggered.
*/
addOptions: function (newOptions, reinitialize) {
var singleTileChanged = newOptions.singleTile !== undefined &&
newOptions.singleTile !== this.singleTile;
OpenLayers.Layer.HTTPRequest.prototype.addOptions.apply(this, arguments);
if (this.map && singleTileChanged) {
this.initProperties();
this.clearGrid();
this.tileSize = this.options.tileSize;
this.setTileSize();
this.moveTo(null, true);
}
},
/**
* APIMethod: clone
* Create a clone of this layer
*
* Parameters:
* obj - {Object} Is this ever used?
*
* Returns:
* {<OpenLayers.Layer.Grid>} An exact clone of this OpenLayers.Layer.Grid
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.Grid(this.name,
this.url,
this.params,
this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
if (this.tileSize != null) {
obj.tileSize = this.tileSize.clone();
}
// we do not want to copy reference to grid, so we make a new array
obj.grid = [];
obj.gridResolution = null;
// same for backbuffer
obj.backBuffer = null;
obj.backBufferTimerId = null;
obj.loading = false;
obj.numLoadingTiles = 0;
return obj;
},
/**
* Method: moveTo
* This function is called whenever the map is moved. All the moving
* of actual 'tiles' is done by the map, but moveTo's role is to accept
* a bounds and make sure the data that that bounds requires is pre-loaded.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
* zoomChanged - {Boolean}
* dragging - {Boolean}
*/
moveTo:function(bounds, zoomChanged, dragging) {
OpenLayers.Layer.HTTPRequest.prototype.moveTo.apply(this, arguments);
bounds = bounds || this.map.getExtent();
if (bounds != null) {
// if grid is empty or zoom has changed, we *must* re-tile
var forceReTile = !this.grid.length || zoomChanged;
// total bounds of the tiles
var tilesBounds = this.getTilesBounds();
// the new map resolution
var resolution = this.map.getResolution();
// the server-supported resolution for the new map resolution
var serverResolution = this.getServerResolution(resolution);
if (this.singleTile) {
// We want to redraw whenever even the slightest part of the
// current bounds is not contained by our tile.
// (thus, we do not specify partial -- its default is false)
if ( forceReTile ||
(!dragging && !tilesBounds.containsBounds(bounds))) {
// In single tile mode with no transition effect, we insert
// a non-scaled backbuffer when the layer is moved. But if
// a zoom occurs right after a move, i.e. before the new
// image is received, we need to remove the backbuffer, or
// an ill-positioned image will be visible during the zoom
// transition.
if(zoomChanged && this.transitionEffect !== 'resize') {
this.removeBackBuffer();
}
if(!zoomChanged || this.transitionEffect === 'resize') {
this.applyBackBuffer(resolution);
}
this.initSingleTile(bounds);
}
} else {
// if the bounds have changed such that they are not even
// *partially* contained by our tiles (e.g. when user has
// programmatically panned to the other side of the earth on
// zoom level 18), then moveGriddedTiles could potentially have
// to run through thousands of cycles, so we want to reTile
// instead (thus, partial true).
forceReTile = forceReTile ||
!tilesBounds.intersectsBounds(bounds, {
worldBounds: this.map.baseLayer.wrapDateLine &&
this.map.getMaxExtent()
});
if(forceReTile) {
if(zoomChanged && (this.transitionEffect === 'resize' ||
this.gridResolution === resolution)) {
this.applyBackBuffer(resolution);
}
this.initGriddedTiles(bounds);
} else {
this.moveGriddedTiles();
}
}
}
},
/**
* Method: getTileData
* Given a map location, retrieve a tile and the pixel offset within that
* tile corresponding to the location. If there is not an existing
* tile in the grid that covers the given location, null will be
* returned.
*
* Parameters:
* loc - {<OpenLayers.LonLat>} map location
*
* Returns:
* {Object} Object with the following properties: tile ({<OpenLayers.Tile>}),
* i ({Number} x-pixel offset from top left), and j ({Integer} y-pixel
* offset from top left).
*/
getTileData: function(loc) {
var data = null,
x = loc.lon,
y = loc.lat,
numRows = this.grid.length;
if (this.map && numRows) {
var res = this.map.getResolution(),
tileWidth = this.tileSize.w,
tileHeight = this.tileSize.h,
bounds = this.grid[0][0].bounds,
left = bounds.left,
top = bounds.top;
if (x < left) {
// deal with multiple worlds
if (this.map.baseLayer.wrapDateLine) {
var worldWidth = this.map.getMaxExtent().getWidth();
var worldsAway = Math.ceil((left - x) / worldWidth);
x += worldWidth * worldsAway;
}
}
// tile distance to location (fractional number of tiles);
var dtx = (x - left) / (res * tileWidth);
var dty = (top - y) / (res * tileHeight);
// index of tile in grid
var col = Math.floor(dtx);
var row = Math.floor(dty);
if (row >= 0 && row < numRows) {
var tile = this.grid[row][col];
if (tile) {
data = {
tile: tile,
// pixel index within tile
i: Math.floor((dtx - col) * tileWidth),
j: Math.floor((dty - row) * tileHeight)
};
}
}
}
return data;
},
/**
* Method: destroyTile
*
* Parameters:
* tile - {<OpenLayers.Tile>}
*/
destroyTile: function(tile) {
this.removeTileMonitoringHooks(tile);
tile.destroy();
},
/**
* Method: getServerResolution
* Return the closest server-supported resolution.
*
* Parameters:
* resolution - {Number} The base resolution. If undefined the
* map resolution is used.
*
* Returns:
* {Number} The closest server resolution value.
*/
getServerResolution: function(resolution) {
var distance = Number.POSITIVE_INFINITY;
resolution = resolution || this.map.getResolution();
if(this.serverResolutions &&
OpenLayers.Util.indexOf(this.serverResolutions, resolution) === -1) {
var i, newDistance, newResolution, serverResolution;
for(i=this.serverResolutions.length-1; i>= 0; i--) {
newResolution = this.serverResolutions[i];
newDistance = Math.abs(newResolution - resolution);
if (newDistance > distance) {
break;
}
distance = newDistance;
serverResolution = newResolution;
}
resolution = serverResolution;
}
return resolution;
},
/**
* Method: getServerZoom
* Return the zoom value corresponding to the best matching server
* resolution, taking into account <serverResolutions> and <zoomOffset>.
*
* Returns:
* {Number} The closest server supported zoom. This is not the map zoom
* level, but an index of the server's resolutions array.
*/
getServerZoom: function() {
var resolution = this.getServerResolution();
return this.serverResolutions ?
OpenLayers.Util.indexOf(this.serverResolutions, resolution) :
this.map.getZoomForResolution(resolution) + (this.zoomOffset || 0);
},
/**
* Method: applyBackBuffer
* Create, insert, scale and position a back buffer for the layer.
*
* Parameters:
* resolution - {Number} The resolution to transition to.
*/
applyBackBuffer: function(resolution) {
if(this.backBufferTimerId !== null) {
this.removeBackBuffer();
}
var backBuffer = this.backBuffer;
if(!backBuffer) {
backBuffer = this.createBackBuffer();
if(!backBuffer) {
return;
}
if (resolution === this.gridResolution) {
this.div.insertBefore(backBuffer, this.div.firstChild);
} else {
this.map.baseLayer.div.parentNode.insertBefore(backBuffer, this.map.baseLayer.div);
}
this.backBuffer = backBuffer;
// set some information in the instance for subsequent
// calls to applyBackBuffer where the same back buffer
// is reused
var topLeftTileBounds = this.grid[0][0].bounds;
this.backBufferLonLat = {
lon: topLeftTileBounds.left,
lat: topLeftTileBounds.top
};
this.backBufferResolution = this.gridResolution;
}
var ratio = this.backBufferResolution / resolution;
// scale the tiles inside the back buffer
var tiles = backBuffer.childNodes, tile;
for (var i=tiles.length-1; i>=0; --i) {
tile = tiles[i];
tile.style.top = ((ratio * tile._i * tile._h) | 0) + 'px';
tile.style.left = ((ratio * tile._j * tile._w) | 0) + 'px';
tile.style.width = Math.round(ratio * tile._w) + 'px';
tile.style.height = Math.round(ratio * tile._h) + 'px';
}
// and position it (based on the grid's top-left corner)
var position = this.getViewPortPxFromLonLat(
this.backBufferLonLat, resolution);
var leftOffset = this.map.layerContainerOriginPx.x;
var topOffset = this.map.layerContainerOriginPx.y;
backBuffer.style.left = Math.round(position.x - leftOffset) + 'px';
backBuffer.style.top = Math.round(position.y - topOffset) + 'px';
},
/**
* Method: createBackBuffer
* Create a back buffer.
*
* Returns:
* {DOMElement} The DOM element for the back buffer, undefined if the
* grid isn't initialized yet.
*/
createBackBuffer: function() {
var backBuffer;
if(this.grid.length > 0) {
backBuffer = document.createElement('div');
backBuffer.id = this.div.id + '_bb';
backBuffer.className = 'olBackBuffer';
backBuffer.style.position = 'absolute';
var map = this.map;
backBuffer.style.zIndex = this.transitionEffect === 'resize' ?
this.getZIndex() - 1 :
// 'map-resize':
map.Z_INDEX_BASE.BaseLayer -
(map.getNumLayers() - map.getLayerIndex(this));
for(var i=0, lenI=this.grid.length; i<lenI; i++) {
for(var j=0, lenJ=this.grid[i].length; j<lenJ; j++) {
var tile = this.grid[i][j],
markup = this.grid[i][j].createBackBuffer();
if (markup) {
markup._i = i;
markup._j = j;
markup._w = tile.size.w;
markup._h = tile.size.h;
markup.id = tile.id + '_bb';
backBuffer.appendChild(markup);
}
}
}
}
return backBuffer;
},
/**
* Method: removeBackBuffer
* Remove back buffer from DOM.
*/
removeBackBuffer: function() {
if (this._transitionElement) {
for (var i=this.transitionendEvents.length-1; i>=0; --i) {
OpenLayers.Event.stopObserving(this._transitionElement,
this.transitionendEvents[i], this._removeBackBuffer);
}
delete this._transitionElement;
}
if(this.backBuffer) {
if (this.backBuffer.parentNode) {
this.backBuffer.parentNode.removeChild(this.backBuffer);
}
this.backBuffer = null;
this.backBufferResolution = null;
if(this.backBufferTimerId !== null) {
window.clearTimeout(this.backBufferTimerId);
this.backBufferTimerId = null;
}
}
},
/**
* Method: moveByPx
* Move the layer based on pixel vector.
*
* Parameters:
* dx - {Number}
* dy - {Number}
*/
moveByPx: function(dx, dy) {
if (!this.singleTile) {
this.moveGriddedTiles();
}
},
/**
* APIMethod: setTileSize
* Check if we are in singleTile mode and if so, set the size as a ratio
* of the map size (as specified by the layer's 'ratio' property).
*
* Parameters:
* size - {<OpenLayers.Size>}
*/
setTileSize: function(size) {
if (this.singleTile) {
size = this.map.getSize();
size.h = parseInt(size.h * this.ratio, 10);
size.w = parseInt(size.w * this.ratio, 10);
}
OpenLayers.Layer.HTTPRequest.prototype.setTileSize.apply(this, [size]);
},
/**
* APIMethod: getTilesBounds
* Return the bounds of the tile grid.
*
* Returns:
* {<OpenLayers.Bounds>} A Bounds object representing the bounds of all the
* currently loaded tiles (including those partially or not at all seen
* onscreen).
*/
getTilesBounds: function() {
var bounds = null;
var length = this.grid.length;
if (length) {
var bottomLeftTileBounds = this.grid[length - 1][0].bounds,
width = this.grid[0].length * bottomLeftTileBounds.getWidth(),
height = this.grid.length * bottomLeftTileBounds.getHeight();
bounds = new OpenLayers.Bounds(bottomLeftTileBounds.left,
bottomLeftTileBounds.bottom,
bottomLeftTileBounds.left + width,
bottomLeftTileBounds.bottom + height);
}
return bounds;
},
/**
* Method: initSingleTile
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*/
initSingleTile: function(bounds) {
this.events.triggerEvent("retile");
//determine new tile bounds
var center = bounds.getCenterLonLat();
var tileWidth = bounds.getWidth() * this.ratio;
var tileHeight = bounds.getHeight() * this.ratio;
var tileBounds =
new OpenLayers.Bounds(center.lon - (tileWidth/2),
center.lat - (tileHeight/2),
center.lon + (tileWidth/2),
center.lat + (tileHeight/2));
var px = this.map.getLayerPxFromLonLat({
lon: tileBounds.left,
lat: tileBounds.top
});
if (!this.grid.length) {
this.grid[0] = [];
}
var tile = this.grid[0][0];
if (!tile) {
tile = this.addTile(tileBounds, px);
this.addTileMonitoringHooks(tile);
tile.draw();
this.grid[0][0] = tile;
} else {
tile.moveTo(tileBounds, px);
}
//remove all but our single tile
this.removeExcessTiles(1,1);
// store the resolution of the grid
this.gridResolution = this.getServerResolution();
},
/**
* Method: calculateGridLayout
* Generate parameters for the grid layout.
*
* Parameters:
* bounds - {<OpenLayers.Bound>|Object} OpenLayers.Bounds or an
* object with a 'left' and 'top' properties.
* origin - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
* object with a 'lon' and 'lat' properties.
* resolution - {Number}
*
* Returns:
* {Object} Object containing properties tilelon, tilelat, startcol,
* startrow
*/
calculateGridLayout: function(bounds, origin, resolution) {
var tilelon = resolution * this.tileSize.w;
var tilelat = resolution * this.tileSize.h;
var offsetlon = bounds.left - origin.lon;
var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
var rowSign = this.rowSign;
var offsetlat = rowSign * (origin.lat - bounds.top + tilelat);
var tilerow = Math[~rowSign ? 'floor' : 'ceil'](offsetlat/tilelat) - this.buffer * rowSign;
return {
tilelon: tilelon, tilelat: tilelat,
startcol: tilecol, startrow: tilerow
};
},
/**
* Method: getTileOrigin
* Determine the origin for aligning the grid of tiles. If a <tileOrigin>
* property is supplied, that will be returned. Otherwise, the origin
* will be derived from the layer's <maxExtent> property. In this case,
* the tile origin will be the corner of the <maxExtent> given by the
* <tileOriginCorner> property.
*
* Returns:
* {<OpenLayers.LonLat>} The tile origin.
*/
getTileOrigin: function() {
var origin = this.tileOrigin;
if (!origin) {
var extent = this.getMaxExtent();
var edges = ({
"tl": ["left", "top"],
"tr": ["right", "top"],
"bl": ["left", "bottom"],
"br": ["right", "bottom"]
})[this.tileOriginCorner];
origin = new OpenLayers.LonLat(extent[edges[0]], extent[edges[1]]);
}
return origin;
},
/**
* Method: getTileBoundsForGridIndex
*
* Parameters:
* row - {Number} The row of the grid
* col - {Number} The column of the grid
*
* Returns:
* {<OpenLayers.Bounds>} The bounds for the tile at (row, col)
*/
getTileBoundsForGridIndex: function(row, col) {
var origin = this.getTileOrigin();
var tileLayout = this.gridLayout;
var tilelon = tileLayout.tilelon;
var tilelat = tileLayout.tilelat;
var startcol = tileLayout.startcol;
var startrow = tileLayout.startrow;
var rowSign = this.rowSign;
return new OpenLayers.Bounds(
origin.lon + (startcol + col) * tilelon,
origin.lat - (startrow + row * rowSign) * tilelat * rowSign,
origin.lon + (startcol + col + 1) * tilelon,
origin.lat - (startrow + (row - 1) * rowSign) * tilelat * rowSign
);
},
/**
* Method: initGriddedTiles
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*/
initGriddedTiles:function(bounds) {
this.events.triggerEvent("retile");
// work out mininum number of rows and columns; this is the number of
// tiles required to cover the viewport plus at least one for panning
var viewSize = this.map.getSize();
var origin = this.getTileOrigin();
var resolution = this.map.getResolution(),
serverResolution = this.getServerResolution(),
ratio = resolution / serverResolution,
tileSize = {
w: this.tileSize.w / ratio,
h: this.tileSize.h / ratio
};
var minRows = Math.ceil(viewSize.h/tileSize.h) +
2 * this.buffer + 1;
var minCols = Math.ceil(viewSize.w/tileSize.w) +
2 * this.buffer + 1;
var tileLayout = this.calculateGridLayout(bounds, origin, serverResolution);
this.gridLayout = tileLayout;
var tilelon = tileLayout.tilelon;
var tilelat = tileLayout.tilelat;
var layerContainerDivLeft = this.map.layerContainerOriginPx.x;
var layerContainerDivTop = this.map.layerContainerOriginPx.y;
var tileBounds = this.getTileBoundsForGridIndex(0, 0);
var startPx = this.map.getViewPortPxFromLonLat(
new OpenLayers.LonLat(tileBounds.left, tileBounds.top)
);
startPx.x = Math.round(startPx.x) - layerContainerDivLeft;
startPx.y = Math.round(startPx.y) - layerContainerDivTop;
var tileData = [], center = this.map.getCenter();
var rowidx = 0;
do {
var row = this.grid[rowidx];
if (!row) {
row = [];
this.grid.push(row);
}
var colidx = 0;
do {
tileBounds = this.getTileBoundsForGridIndex(rowidx, colidx);
var px = startPx.clone();
px.x = px.x + colidx * Math.round(tileSize.w);
px.y = px.y + rowidx * Math.round(tileSize.h);
var tile = row[colidx];
if (!tile) {
tile = this.addTile(tileBounds, px);
this.addTileMonitoringHooks(tile);
row.push(tile);
} else {
tile.moveTo(tileBounds, px, false);
}
var tileCenter = tileBounds.getCenterLonLat();
tileData.push({
tile: tile,
distance: Math.pow(tileCenter.lon - center.lon, 2) +
Math.pow(tileCenter.lat - center.lat, 2)
});
colidx += 1;
} while ((tileBounds.right <= bounds.right + tilelon * this.buffer)
|| colidx < minCols);
rowidx += 1;
} while((tileBounds.bottom >= bounds.bottom - tilelat * this.buffer)
|| rowidx < minRows);
//shave off exceess rows and colums
this.removeExcessTiles(rowidx, colidx);
var resolution = this.getServerResolution();
// store the resolution of the grid
this.gridResolution = resolution;
//now actually draw the tiles
tileData.sort(function(a, b) {
return a.distance - b.distance;
});
for (var i=0, ii=tileData.length; i<ii; ++i) {
tileData[i].tile.draw();
}
},
/**
* Method: getMaxExtent
* Get this layer's maximum extent. (Implemented as a getter for
* potential specific implementations in sub-classes.)
*
* Returns:
* {<OpenLayers.Bounds>}
*/
getMaxExtent: function() {
return this.maxExtent;
},
/**
* APIMethod: addTile
* Create a tile, initialize it, and add it to the layer div.
*
* Parameters
* bounds - {<OpenLayers.Bounds>}
* position - {<OpenLayers.Pixel>}
*
* Returns:
* {<OpenLayers.Tile>} The added OpenLayers.Tile
*/
addTile: function(bounds, position) {
var tile = new this.tileClass(
this, position, bounds, null, this.tileSize, this.tileOptions
);
this.events.triggerEvent("addtile", {tile: tile});
return tile;
},
/**
* Method: addTileMonitoringHooks
* This function takes a tile as input and adds the appropriate hooks to
* the tile so that the layer can keep track of the loading tiles.
*
* Parameters:
* tile - {<OpenLayers.Tile>}
*/
addTileMonitoringHooks: function(tile) {
var replacingCls = 'olTileReplacing';
tile.onLoadStart = function() {
//if that was first tile then trigger a 'loadstart' on the layer
if (this.loading === false) {
this.loading = true;
this.events.triggerEvent("loadstart");
}
this.events.triggerEvent("tileloadstart", {tile: tile});
this.numLoadingTiles++;
if (!this.singleTile && this.backBuffer && this.gridResolution === this.backBufferResolution) {
OpenLayers.Element.addClass(tile.getTile(), replacingCls);
}
};
tile.onLoadEnd = function(evt) {
this.numLoadingTiles--;
var aborted = evt.type === 'unload';
this.events.triggerEvent("tileloaded", {
tile: tile,
aborted: aborted
});
if (!this.singleTile && !aborted && this.backBuffer && this.gridResolution === this.backBufferResolution) {
var tileDiv = tile.getTile();
if (OpenLayers.Element.getStyle(tileDiv, 'display') === 'none') {
var bufferTile = document.getElementById(tile.id + '_bb');
if (bufferTile) {
bufferTile.parentNode.removeChild(bufferTile);
}
}
OpenLayers.Element.removeClass(tileDiv, replacingCls);
}
//if that was the last tile, then trigger a 'loadend' on the layer
if (this.numLoadingTiles === 0) {
if (this.backBuffer) {
if (this.backBuffer.childNodes.length === 0) {
// no tiles transitioning, remove immediately
this.removeBackBuffer();
} else {
// wait until transition has ended or delay has passed
this._transitionElement = aborted ?
this.div.lastChild : tile.imgDiv;
var transitionendEvents = this.transitionendEvents;
for (var i=transitionendEvents.length-1; i>=0; --i) {
OpenLayers.Event.observe(this._transitionElement,
transitionendEvents[i],
this._removeBackBuffer);
}
// the removal of the back buffer is delayed to prevent
// flash effects due to the animation of tile displaying
this.backBufferTimerId = window.setTimeout(
this._removeBackBuffer, this.removeBackBufferDelay
);
}
}
this.loading = false;
this.events.triggerEvent("loadend");
}
};
tile.onLoadError = function() {
this.events.triggerEvent("tileerror", {tile: tile});
};
tile.events.on({
"loadstart": tile.onLoadStart,
"loadend": tile.onLoadEnd,
"unload": tile.onLoadEnd,
"loaderror": tile.onLoadError,
scope: this
});
},
/**
* Method: removeTileMonitoringHooks
* This function takes a tile as input and removes the tile hooks
* that were added in addTileMonitoringHooks()
*
* Parameters:
* tile - {<OpenLayers.Tile>}
*/
removeTileMonitoringHooks: function(tile) {
tile.unload();
tile.events.un({
"loadstart": tile.onLoadStart,
"loadend": tile.onLoadEnd,
"unload": tile.onLoadEnd,
"loaderror": tile.onLoadError,
scope: this
});
},
/**
* Method: moveGriddedTiles
*/
moveGriddedTiles: function() {
var buffer = this.buffer + 1;
while(true) {
var tlTile = this.grid[0][0];
var tlViewPort = {
x: tlTile.position.x +
this.map.layerContainerOriginPx.x,
y: tlTile.position.y +
this.map.layerContainerOriginPx.y
};
var ratio = this.getServerResolution() / this.map.getResolution();
var tileSize = {
w: Math.round(this.tileSize.w * ratio),
h: Math.round(this.tileSize.h * ratio)
};
if (tlViewPort.x > -tileSize.w * (buffer - 1)) {
this.shiftColumn(true, tileSize);
} else if (tlViewPort.x < -tileSize.w * buffer) {
this.shiftColumn(false, tileSize);
} else if (tlViewPort.y > -tileSize.h * (buffer - 1)) {
this.shiftRow(true, tileSize);
} else if (tlViewPort.y < -tileSize.h * buffer) {
this.shiftRow(false, tileSize);
} else {
break;
}
}
},
/**
* Method: shiftRow
* Shifty grid work
*
* Parameters:
* prepend - {Boolean} if true, prepend to beginning.
* if false, then append to end
* tileSize - {Object} rendered tile size; object with w and h properties
*/
shiftRow: function(prepend, tileSize) {
var grid = this.grid;
var rowIndex = prepend ? 0 : (grid.length - 1);
var sign = prepend ? -1 : 1;
var rowSign = this.rowSign;
var tileLayout = this.gridLayout;
tileLayout.startrow += sign * rowSign;
var modelRow = grid[rowIndex];
var row = grid[prepend ? 'pop' : 'shift']();
for (var i=0, len=row.length; i<len; i++) {
var tile = row[i];
var position = modelRow[i].position.clone();
position.y += tileSize.h * sign;
tile.moveTo(this.getTileBoundsForGridIndex(rowIndex, i), position);
}
grid[prepend ? 'unshift' : 'push'](row);
},
/**
* Method: shiftColumn
* Shift grid work in the other dimension
*
* Parameters:
* prepend - {Boolean} if true, prepend to beginning.
* if false, then append to end
* tileSize - {Object} rendered tile size; object with w and h properties
*/
shiftColumn: function(prepend, tileSize) {
var grid = this.grid;
var colIndex = prepend ? 0 : (grid[0].length - 1);
var sign = prepend ? -1 : 1;
var tileLayout = this.gridLayout;
tileLayout.startcol += sign;
for (var i=0, len=grid.length; i<len; i++) {
var row = grid[i];
var position = row[colIndex].position.clone();
var tile = row[prepend ? 'pop' : 'shift']();
position.x += tileSize.w * sign;
tile.moveTo(this.getTileBoundsForGridIndex(i, colIndex), position);
row[prepend ? 'unshift' : 'push'](tile);
}
},
/**
* Method: removeExcessTiles
* When the size of the map or the buffer changes, we may need to
* remove some excess rows and columns.
*
* Parameters:
* rows - {Integer} Maximum number of rows we want our grid to have.
* columns - {Integer} Maximum number of columns we want our grid to have.
*/
removeExcessTiles: function(rows, columns) {
var i, l;
// remove extra rows
while (this.grid.length > rows) {
var row = this.grid.pop();
for (i=0, l=row.length; i<l; i++) {
var tile = row[i];
this.destroyTile(tile);
}
}
// remove extra columns
for (i=0, l=this.grid.length; i<l; i++) {
while (this.grid[i].length > columns) {
var row = this.grid[i];
var tile = row.pop();
this.destroyTile(tile);
}
}
},
/**
* Method: onMapResize
* For singleTile layers, this will set a new tile size according to the
* dimensions of the map pane.
*/
onMapResize: function() {
if (this.singleTile) {
this.clearGrid();
this.setTileSize();
}
},
/**
* APIMethod: getTileBounds
* Returns The tile bounds for a layer given a pixel location.
*
* Parameters:
* viewPortPx - {<OpenLayers.Pixel>} The location in the viewport.
*
* Returns:
* {<OpenLayers.Bounds>} Bounds of the tile at the given pixel location.
*/
getTileBounds: function(viewPortPx) {
var maxExtent = this.maxExtent;
var resolution = this.getResolution();
var tileMapWidth = resolution * this.tileSize.w;
var tileMapHeight = resolution * this.tileSize.h;
var mapPoint = this.getLonLatFromViewPortPx(viewPortPx);
var tileLeft = maxExtent.left + (tileMapWidth *
Math.floor((mapPoint.lon -
maxExtent.left) /
tileMapWidth));
var tileBottom = maxExtent.bottom + (tileMapHeight *
Math.floor((mapPoint.lat -
maxExtent.bottom) /
tileMapHeight));
return new OpenLayers.Bounds(tileLeft, tileBottom,
tileLeft + tileMapWidth,
tileBottom + tileMapHeight);
},
CLASS_NAME: "OpenLayers.Layer.Grid"
});
/* ======================================================================
OpenLayers/Layer/XYZ.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/Grid.js
*/
/**
* Class: OpenLayers.Layer.XYZ
* The XYZ class is designed to make it easier for people who have tiles
* arranged by a standard XYZ grid.
*
* Inherits from:
* - <OpenLayers.Layer.Grid>
*/
OpenLayers.Layer.XYZ = OpenLayers.Class(OpenLayers.Layer.Grid, {
/**
* APIProperty: isBaseLayer
* Default is true, as this is designed to be a base tile source.
*/
isBaseLayer: true,
/**
* APIProperty: sphericalMercator
* Whether the tile extents should be set to the defaults for
* spherical mercator. Useful for things like OpenStreetMap.
* Default is false, except for the OSM subclass.
*/
sphericalMercator: false,
/**
* APIProperty: zoomOffset
* {Number} If your cache has more zoom levels than you want to provide
* access to with this layer, supply a zoomOffset. This zoom offset
* is added to the current map zoom level to determine the level
* for a requested tile. For example, if you supply a zoomOffset
* of 3, when the map is at the zoom 0, tiles will be requested from
* level 3 of your cache. Default is 0 (assumes cache level and map
* zoom are equivalent). Using <zoomOffset> is an alternative to
* setting <serverResolutions> if you only want to expose a subset
* of the server resolutions.
*/
zoomOffset: 0,
/**
* APIProperty: serverResolutions
* {Array} A list of all resolutions available on the server. Only set this
* property if the map resolutions differ from the server. This
* property serves two purposes. (a) <serverResolutions> can include
* resolutions that the server supports and that you don't want to
* provide with this layer; you can also look at <zoomOffset>, which is
* an alternative to <serverResolutions> for that specific purpose.
* (b) The map can work with resolutions that aren't supported by
* the server, i.e. that aren't in <serverResolutions>. When the
* map is displayed in such a resolution data for the closest
* server-supported resolution is loaded and the layer div is
* stretched as necessary.
*/
serverResolutions: null,
/**
* Constructor: OpenLayers.Layer.XYZ
*
* Parameters:
* name - {String}
* url - {String}
* options - {Object} Hashtable of extra options to tag onto the layer
*/
initialize: function(name, url, options) {
if (options && options.sphericalMercator || this.sphericalMercator) {
options = OpenLayers.Util.extend({
projection: "EPSG:900913",
numZoomLevels: 19
}, options);
}
OpenLayers.Layer.Grid.prototype.initialize.apply(this, [
name || this.name, url || this.url, {}, options
]);
},
/**
* APIMethod: clone
* Create a clone of this layer
*
* Parameters:
* obj - {Object} Is this ever used?
*
* Returns:
* {<OpenLayers.Layer.XYZ>} An exact clone of this OpenLayers.Layer.XYZ
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.XYZ(this.name,
this.url,
this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
return obj;
},
/**
* Method: getURL
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*
* Returns:
* {String} A string with the layer's url and parameters and also the
* passed-in bounds and appropriate tile size specified as
* parameters
*/
getURL: function (bounds) {
var xyz = this.getXYZ(bounds);
var url = this.url;
if (OpenLayers.Util.isArray(url)) {
var s = '' + xyz.x + xyz.y + xyz.z;
url = this.selectUrl(s, url);
}
return OpenLayers.String.format(url, xyz);
},
/**
* Method: getXYZ
* Calculates x, y and z for the given bounds.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
*
* Returns:
* {Object} - an object with x, y and z properties.
*/
getXYZ: function(bounds) {
var res = this.getServerResolution();
var x = Math.round((bounds.left - this.maxExtent.left) /
(res * this.tileSize.w));
var y = Math.round((this.maxExtent.top - bounds.top) /
(res * this.tileSize.h));
var z = this.getServerZoom();
if (this.wrapDateLine) {
var limit = Math.pow(2, z);
x = ((x % limit) + limit) % limit;
}
return {'x': x, 'y': y, 'z': z};
},
/* APIMethod: setMap
* When the layer is added to a map, then we can fetch our origin
* (if we don't have one.)
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
if (!this.tileOrigin) {
this.tileOrigin = new OpenLayers.LonLat(this.maxExtent.left,
this.maxExtent.bottom);
}
},
CLASS_NAME: "OpenLayers.Layer.XYZ"
});
/* ======================================================================
OpenLayers/Layer/OSM.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/XYZ.js
*/
/**
* Class: OpenLayers.Layer.OSM
* This layer allows accessing OpenStreetMap tiles. By default the OpenStreetMap
* hosted tile.openstreetmap.org Mapnik tileset is used. If you wish to use
* a different layer instead, you need to provide a different
* URL to the constructor. Here's an example for using OpenCycleMap:
*
* (code)
* new OpenLayers.Layer.OSM("OpenCycleMap",
* ["http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
* "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
* "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"]);
* (end)
*
* Inherits from:
* - <OpenLayers.Layer.XYZ>
*/
OpenLayers.Layer.OSM = OpenLayers.Class(OpenLayers.Layer.XYZ, {
/**
* APIProperty: name
* {String} The layer name. Defaults to "OpenStreetMap" if the first
* argument to the constructor is null or undefined.
*/
name: "OpenStreetMap",
/**
* APIProperty: url
* {String} The tileset URL scheme. Defaults to
* : http://[a|b|c].tile.openstreetmap.org/${z}/${x}/${y}.png
* (the official OSM tileset) if the second argument to the constructor
* is null or undefined. To use another tileset you can have something
* like this:
* (code)
* new OpenLayers.Layer.OSM("OpenCycleMap",
* ["http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
* "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
* "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"]);
* (end)
*/
url: [
'http://a.tile.openstreetmap.org/${z}/${x}/${y}.png',
'http://b.tile.openstreetmap.org/${z}/${x}/${y}.png',
'http://c.tile.openstreetmap.org/${z}/${x}/${y}.png'
],
/**
* Property: attribution
* {String} The layer attribution.
*/
attribution: "&copy; <a href='http://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors",
/**
* Property: sphericalMercator
* {Boolean}
*/
sphericalMercator: true,
/**
* Property: wrapDateLine
* {Boolean}
*/
wrapDateLine: true,
/** APIProperty: tileOptions
* {Object} optional configuration options for <OpenLayers.Tile> instances
* created by this Layer. Default is
*
* (code)
* {crossOriginKeyword: 'anonymous'}
* (end)
*
* When using OSM tilesets other than the default ones, it may be
* necessary to set this to
*
* (code)
* {crossOriginKeyword: null}
* (end)
*
* if the server does not send Access-Control-Allow-Origin headers.
*/
tileOptions: null,
/**
* Constructor: OpenLayers.Layer.OSM
*
* Parameters:
* name - {String} The layer name.
* url - {String} The tileset URL scheme.
* options - {Object} Configuration options for the layer. Any inherited
* layer option can be set in this object (e.g.
* <OpenLayers.Layer.Grid.buffer>).
*/
initialize: function(name, url, options) {
OpenLayers.Layer.XYZ.prototype.initialize.apply(this, arguments);
this.tileOptions = OpenLayers.Util.extend({
crossOriginKeyword: 'anonymous'
}, this.options && this.options.tileOptions);
},
/**
* Method: clone
*/
clone: function(obj) {
if (obj == null) {
obj = new OpenLayers.Layer.OSM(
this.name, this.url, this.getOptions());
}
obj = OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
return obj;
},
CLASS_NAME: "OpenLayers.Layer.OSM"
});
/* ======================================================================
OpenLayers/Renderer.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Renderer
* This is the base class for all renderers.
*
* This is based on a merger code written by Paul Spencer and Bertil Chapuis.
* It is largely composed of virtual functions that are to be implemented
* in technology-specific subclasses, but there is some generic code too.
*
* The functions that *are* implemented here merely deal with the maintenance
* of the size and extent variables, as well as the cached 'resolution'
* value.
*
* A note to the user that all subclasses should use getResolution() instead
* of directly accessing this.resolution in order to correctly use the
* cacheing system.
*
*/
OpenLayers.Renderer = OpenLayers.Class({
/**
* Property: container
* {DOMElement}
*/
container: null,
/**
* Property: root
* {DOMElement}
*/
root: null,
/**
* Property: extent
* {<OpenLayers.Bounds>}
*/
extent: null,
/**
* Property: locked
* {Boolean} If the renderer is currently in a state where many things
* are changing, the 'locked' property is set to true. This means
* that renderers can expect at least one more drawFeature event to be
* called with the 'locked' property set to 'true': In some renderers,
* this might make sense to use as a 'only update local information'
* flag.
*/
locked: false,
/**
* Property: size
* {<OpenLayers.Size>}
*/
size: null,
/**
* Property: resolution
* {Float} cache of current map resolution
*/
resolution: null,
/**
* Property: map
* {<OpenLayers.Map>} Reference to the map -- this is set in Vector's setMap()
*/
map: null,
/**
* Property: featureDx
* {Number} Feature offset in x direction. Will be calculated for and
* applied to the current feature while rendering (see
* <calculateFeatureDx>).
*/
featureDx: 0,
/**
* Constructor: OpenLayers.Renderer
*
* Parameters:
* containerID - {<String>}
* options - {Object} options for this renderer. See sublcasses for
* supported options.
*/
initialize: function(containerID, options) {
this.container = OpenLayers.Util.getElement(containerID);
OpenLayers.Util.extend(this, options);
},
/**
* APIMethod: destroy
*/
destroy: function() {
this.container = null;
this.extent = null;
this.size = null;
this.resolution = null;
this.map = null;
},
/**
* APIMethod: supported
* This should be overridden by specific subclasses
*
* Returns:
* {Boolean} Whether or not the browser supports the renderer class
*/
supported: function() {
return false;
},
/**
* Method: setExtent
* Set the visible part of the layer.
*
* Resolution has probably changed, so we nullify the resolution
* cache (this.resolution) -- this way it will be re-computed when
* next it is needed.
* We nullify the resolution cache (this.resolution) if resolutionChanged
* is set to true - this way it will be re-computed on the next
* getResolution() request.
*
* Parameters:
* extent - {<OpenLayers.Bounds>}
* resolutionChanged - {Boolean}
*
* Returns:
* {Boolean} true to notify the layer that the new extent does not exceed
* the coordinate range, and the features will not need to be redrawn.
* False otherwise.
*/
setExtent: function(extent, resolutionChanged) {
this.extent = extent.clone();
if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
var ratio = extent.getWidth() / this.map.getExtent().getWidth(),
extent = extent.scale(1 / ratio);
this.extent = extent.wrapDateLine(this.map.getMaxExtent()).scale(ratio);
}
if (resolutionChanged) {
this.resolution = null;
}
return true;
},
/**
* Method: setSize
* Sets the size of the drawing surface.
*
* Resolution has probably changed, so we nullify the resolution
* cache (this.resolution) -- this way it will be re-computed when
* next it is needed.
*
* Parameters:
* size - {<OpenLayers.Size>}
*/
setSize: function(size) {
this.size = size.clone();
this.resolution = null;
},
/**
* Method: getResolution
* Uses cached copy of resolution if available to minimize computing
*
* Returns:
* {Float} The current map's resolution
*/
getResolution: function() {
this.resolution = this.resolution || this.map.getResolution();
return this.resolution;
},
/**
* Method: drawFeature
* Draw the feature. The optional style argument can be used
* to override the feature's own style. This method should only
* be called from layer.drawFeature().
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* style - {<Object>}
*
* Returns:
* {Boolean} true if the feature has been drawn completely, false if not,
* undefined if the feature had no geometry
*/
drawFeature: function(feature, style) {
if(style == null) {
style = feature.style;
}
if (feature.geometry) {
var bounds = feature.geometry.getBounds();
if(bounds) {
var worldBounds;
if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
worldBounds = this.map.getMaxExtent();
}
if (!bounds.intersectsBounds(this.extent, {worldBounds: worldBounds})) {
style = {display: "none"};
} else {
this.calculateFeatureDx(bounds, worldBounds);
}
var rendered = this.drawGeometry(feature.geometry, style, feature.id);
if(style.display != "none" && style.label && rendered !== false) {
var location = feature.geometry.getCentroid();
if(style.labelXOffset || style.labelYOffset) {
var xOffset = isNaN(style.labelXOffset) ? 0 : style.labelXOffset;
var yOffset = isNaN(style.labelYOffset) ? 0 : style.labelYOffset;
var res = this.getResolution();
location.move(xOffset*res, yOffset*res);
}
this.drawText(feature.id, style, location);
} else {
this.removeText(feature.id);
}
return rendered;
}
}
},
/**
* Method: calculateFeatureDx
* {Number} Calculates the feature offset in x direction. Looking at the
* center of the feature bounds and the renderer extent, we calculate how
* many world widths the two are away from each other. This distance is
* used to shift the feature as close as possible to the center of the
* current enderer extent, which ensures that the feature is visible in the
* current viewport.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>} Bounds of the feature
* worldBounds - {<OpenLayers.Bounds>} Bounds of the world
*/
calculateFeatureDx: function(bounds, worldBounds) {
this.featureDx = 0;
if (worldBounds) {
var worldWidth = worldBounds.getWidth(),
rendererCenterX = (this.extent.left + this.extent.right) / 2,
featureCenterX = (bounds.left + bounds.right) / 2,
worldsAway = Math.round((featureCenterX - rendererCenterX) / worldWidth);
this.featureDx = worldsAway * worldWidth;
}
},
/**
* Method: drawGeometry
*
* Draw a geometry. This should only be called from the renderer itself.
* Use layer.drawFeature() from outside the renderer.
* virtual function
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {<String>}
*/
drawGeometry: function(geometry, style, featureId) {},
/**
* Method: drawText
* Function for drawing text labels.
* This method is only called by the renderer itself.
*
* Parameters:
* featureId - {String}
* style -
* location - {<OpenLayers.Geometry.Point>}
*/
drawText: function(featureId, style, location) {},
/**
* Method: removeText
* Function for removing text labels.
* This method is only called by the renderer itself.
*
* Parameters:
* featureId - {String}
*/
removeText: function(featureId) {},
/**
* Method: clear
* Clear all vectors from the renderer.
* virtual function.
*/
clear: function() {},
/**
* Method: getFeatureIdFromEvent
* Returns a feature id from an event on the renderer.
* How this happens is specific to the renderer. This should be
* called from layer.getFeatureFromEvent().
* Virtual function.
*
* Parameters:
* evt - {<OpenLayers.Event>}
*
* Returns:
* {String} A feature id or undefined.
*/
getFeatureIdFromEvent: function(evt) {},
/**
* Method: eraseFeatures
* This is called by the layer to erase features
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)}
*/
eraseFeatures: function(features) {
if(!(OpenLayers.Util.isArray(features))) {
features = [features];
}
for(var i=0, len=features.length; i<len; ++i) {
var feature = features[i];
this.eraseGeometry(feature.geometry, feature.id);
this.removeText(feature.id);
}
},
/**
* Method: eraseGeometry
* Remove a geometry from the renderer (by id).
* virtual function.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* featureId - {String}
*/
eraseGeometry: function(geometry, featureId) {},
/**
* Method: moveRoot
* moves this renderer's root to a (different) renderer.
* To be implemented by subclasses that require a common renderer root for
* feature selection.
*
* Parameters:
* renderer - {<OpenLayers.Renderer>} target renderer for the moved root
*/
moveRoot: function(renderer) {},
/**
* Method: getRenderLayerId
* Gets the layer that this renderer's output appears on. If moveRoot was
* used, this will be different from the id of the layer containing the
* features rendered by this renderer.
*
* Returns:
* {String} the id of the output layer.
*/
getRenderLayerId: function() {
return this.container.id;
},
/**
* Method: applyDefaultSymbolizer
*
* Parameters:
* symbolizer - {Object}
*
* Returns:
* {Object}
*/
applyDefaultSymbolizer: function(symbolizer) {
var result = OpenLayers.Util.extend({},
OpenLayers.Renderer.defaultSymbolizer);
if(symbolizer.stroke === false) {
delete result.strokeWidth;
delete result.strokeColor;
}
if(symbolizer.fill === false) {
delete result.fillColor;
}
OpenLayers.Util.extend(result, symbolizer);
return result;
},
CLASS_NAME: "OpenLayers.Renderer"
});
/**
* Constant: OpenLayers.Renderer.defaultSymbolizer
* {Object} Properties from this symbolizer will be applied to symbolizers
* with missing properties. This can also be used to set a global
* symbolizer default in OpenLayers. To be SLD 1.x compliant, add the
* following code before rendering any vector features:
* (code)
* OpenLayers.Renderer.defaultSymbolizer = {
* fillColor: "#808080",
* fillOpacity: 1,
* strokeColor: "#000000",
* strokeOpacity: 1,
* strokeWidth: 1,
* pointRadius: 3,
* graphicName: "square"
* };
* (end)
*/
OpenLayers.Renderer.defaultSymbolizer = {
fillColor: "#000000",
strokeColor: "#000000",
strokeWidth: 2,
fillOpacity: 1,
strokeOpacity: 1,
pointRadius: 0,
labelAlign: 'cm'
};
/**
* Constant: OpenLayers.Renderer.symbol
* Coordinate arrays for well known (named) symbols.
*/
OpenLayers.Renderer.symbol = {
"star": [350,75, 379,161, 469,161, 397,215, 423,301, 350,250, 277,301,
303,215, 231,161, 321,161, 350,75],
"cross": [4,0, 6,0, 6,4, 10,4, 10,6, 6,6, 6,10, 4,10, 4,6, 0,6, 0,4, 4,4,
4,0],
"x": [0,0, 25,0, 50,35, 75,0, 100,0, 65,50, 100,100, 75,100, 50,65, 25,100, 0,100, 35,50, 0,0],
"square": [0,0, 0,1, 1,1, 1,0, 0,0],
"triangle": [0,10, 10,10, 5,0, 0,10]
};
/* ======================================================================
OpenLayers/Renderer/Canvas.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Renderer.js
*/
/**
* Class: OpenLayers.Renderer.Canvas
* A renderer based on the 2D 'canvas' drawing element.
*
* Inherits:
* - <OpenLayers.Renderer>
*/
OpenLayers.Renderer.Canvas = OpenLayers.Class(OpenLayers.Renderer, {
/**
* APIProperty: hitDetection
* {Boolean} Allow for hit detection of features. Default is true.
*/
hitDetection: true,
/**
* Property: hitOverflow
* {Number} The method for converting feature identifiers to color values
* supports 16777215 sequential values. Two features cannot be
* predictably detected if their identifiers differ by more than this
* value. The hitOverflow allows for bigger numbers (but the
* difference in values is still limited).
*/
hitOverflow: 0,
/**
* Property: canvas
* {Canvas} The canvas context object.
*/
canvas: null,
/**
* Property: features
* {Object} Internal object of feature/style pairs for use in redrawing the layer.
*/
features: null,
/**
* Property: pendingRedraw
* {Boolean} The renderer needs a redraw call to render features added while
* the renderer was locked.
*/
pendingRedraw: false,
/**
* Property: cachedSymbolBounds
* {Object} Internal cache of calculated symbol extents.
*/
cachedSymbolBounds: {},
/**
* Constructor: OpenLayers.Renderer.Canvas
*
* Parameters:
* containerID - {<String>}
* options - {Object} Optional properties to be set on the renderer.
*/
initialize: function(containerID, options) {
OpenLayers.Renderer.prototype.initialize.apply(this, arguments);
this.root = document.createElement("canvas");
this.container.appendChild(this.root);
this.canvas = this.root.getContext("2d");
this.features = {};
if (this.hitDetection) {
this.hitCanvas = document.createElement("canvas");
this.hitContext = this.hitCanvas.getContext("2d");
}
},
/**
* Method: setExtent
* Set the visible part of the layer.
*
* Parameters:
* extent - {<OpenLayers.Bounds>}
* resolutionChanged - {Boolean}
*
* Returns:
* {Boolean} true to notify the layer that the new extent does not exceed
* the coordinate range, and the features will not need to be redrawn.
* False otherwise.
*/
setExtent: function() {
OpenLayers.Renderer.prototype.setExtent.apply(this, arguments);
// always redraw features
return false;
},
/**
* Method: eraseGeometry
* Erase a geometry from the renderer. Because the Canvas renderer has
* 'memory' of the features that it has drawn, we have to remove the
* feature so it doesn't redraw.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* featureId - {String}
*/
eraseGeometry: function(geometry, featureId) {
this.eraseFeatures(this.features[featureId][0]);
},
/**
* APIMethod: supported
*
* Returns:
* {Boolean} Whether or not the browser supports the renderer class
*/
supported: function() {
return OpenLayers.CANVAS_SUPPORTED;
},
/**
* Method: setSize
* Sets the size of the drawing surface.
*
* Once the size is updated, redraw the canvas.
*
* Parameters:
* size - {<OpenLayers.Size>}
*/
setSize: function(size) {
this.size = size.clone();
var root = this.root;
root.style.width = size.w + "px";
root.style.height = size.h + "px";
root.width = size.w;
root.height = size.h;
this.resolution = null;
if (this.hitDetection) {
var hitCanvas = this.hitCanvas;
hitCanvas.style.width = size.w + "px";
hitCanvas.style.height = size.h + "px";
hitCanvas.width = size.w;
hitCanvas.height = size.h;
}
},
/**
* Method: drawFeature
* Draw the feature. Stores the feature in the features list,
* then redraws the layer.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* style - {<Object>}
*
* Returns:
* {Boolean} The feature has been drawn completely. If the feature has no
* geometry, undefined will be returned. If the feature is not rendered
* for other reasons, false will be returned.
*/
drawFeature: function(feature, style) {
var rendered;
if (feature.geometry) {
style = this.applyDefaultSymbolizer(style || feature.style);
// don't render if display none or feature outside extent
var bounds = feature.geometry.getBounds();
var worldBounds;
if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
worldBounds = this.map.getMaxExtent();
}
var intersects = bounds && bounds.intersectsBounds(this.extent, {worldBounds: worldBounds});
rendered = (style.display !== "none") && !!bounds && intersects;
if (rendered) {
// keep track of what we have rendered for redraw
this.features[feature.id] = [feature, style];
}
else {
// remove from features tracked for redraw
delete(this.features[feature.id]);
}
this.pendingRedraw = true;
}
if (this.pendingRedraw && !this.locked) {
this.redraw();
this.pendingRedraw = false;
}
return rendered;
},
/**
* Method: drawGeometry
* Used when looping (in redraw) over the features; draws
* the canvas.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
*/
drawGeometry: function(geometry, style, featureId) {
var className = geometry.CLASS_NAME;
if ((className == "OpenLayers.Geometry.Collection") ||
(className == "OpenLayers.Geometry.MultiPoint") ||
(className == "OpenLayers.Geometry.MultiLineString") ||
(className == "OpenLayers.Geometry.MultiPolygon")) {
for (var i = 0; i < geometry.components.length; i++) {
this.drawGeometry(geometry.components[i], style, featureId);
}
return;
}
switch (geometry.CLASS_NAME) {
case "OpenLayers.Geometry.Point":
this.drawPoint(geometry, style, featureId);
break;
case "OpenLayers.Geometry.LineString":
this.drawLineString(geometry, style, featureId);
break;
case "OpenLayers.Geometry.LinearRing":
this.drawLinearRing(geometry, style, featureId);
break;
case "OpenLayers.Geometry.Polygon":
this.drawPolygon(geometry, style, featureId);
break;
default:
break;
}
},
/**
* Method: drawExternalGraphic
* Called to draw External graphics.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawExternalGraphic: function(geometry, style, featureId) {
var img = new Image();
var title = style.title || style.graphicTitle;
if (title) {
img.title = title;
}
var width = style.graphicWidth || style.graphicHeight;
var height = style.graphicHeight || style.graphicWidth;
width = width ? width : style.pointRadius * 2;
height = height ? height : style.pointRadius * 2;
var xOffset = (style.graphicXOffset != undefined) ?
style.graphicXOffset : -(0.5 * width);
var yOffset = (style.graphicYOffset != undefined) ?
style.graphicYOffset : -(0.5 * height);
var opacity = style.graphicOpacity || style.fillOpacity;
var onLoad = function() {
if(!this.features[featureId]) {
return;
}
var pt = this.getLocalXY(geometry);
var p0 = pt[0];
var p1 = pt[1];
if(!isNaN(p0) && !isNaN(p1)) {
var x = (p0 + xOffset) | 0;
var y = (p1 + yOffset) | 0;
var canvas = this.canvas;
canvas.globalAlpha = opacity;
var factor = OpenLayers.Renderer.Canvas.drawImageScaleFactor ||
(OpenLayers.Renderer.Canvas.drawImageScaleFactor =
/android 2.1/.test(navigator.userAgent.toLowerCase()) ?
// 320 is the screen width of the G1 phone, for
// which drawImage works out of the box.
320 / window.screen.width : 1
);
canvas.drawImage(
img, x*factor, y*factor, width*factor, height*factor
);
if (this.hitDetection) {
this.setHitContextStyle("fill", featureId);
this.hitContext.fillRect(x, y, width, height);
}
}
};
img.onload = OpenLayers.Function.bind(onLoad, this);
img.src = style.externalGraphic;
},
/**
* Method: drawNamedSymbol
* Called to draw Well Known Graphic Symbol Name.
* This method is only called by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawNamedSymbol: function(geometry, style, featureId) {
var x, y, cx, cy, i, symbolBounds, scaling, angle;
var unscaledStrokeWidth;
var deg2rad = Math.PI / 180.0;
var symbol = OpenLayers.Renderer.symbol[style.graphicName];
if (!symbol) {
throw new Error(style.graphicName + ' is not a valid symbol name');
}
if (!symbol.length || symbol.length < 2) return;
var pt = this.getLocalXY(geometry);
var p0 = pt[0];
var p1 = pt[1];
if (isNaN(p0) || isNaN(p1)) return;
// Use rounded line caps
this.canvas.lineCap = "round";
this.canvas.lineJoin = "round";
if (this.hitDetection) {
this.hitContext.lineCap = "round";
this.hitContext.lineJoin = "round";
}
// Scale and rotate symbols, using precalculated bounds whenever possible.
if (style.graphicName in this.cachedSymbolBounds) {
symbolBounds = this.cachedSymbolBounds[style.graphicName];
} else {
symbolBounds = new OpenLayers.Bounds();
for(i = 0; i < symbol.length; i+=2) {
symbolBounds.extend(new OpenLayers.LonLat(symbol[i], symbol[i+1]));
}
this.cachedSymbolBounds[style.graphicName] = symbolBounds;
}
// Push symbol scaling, translation and rotation onto the transformation stack in reverse order.
// Don't forget to apply all canvas transformations to the hitContext canvas as well(!)
this.canvas.save();
if (this.hitDetection) { this.hitContext.save(); }
// Step 3: place symbol at the desired location
this.canvas.translate(p0,p1);
if (this.hitDetection) { this.hitContext.translate(p0,p1); }
// Step 2a. rotate the symbol if necessary
angle = deg2rad * style.rotation; // will be NaN when style.rotation is undefined.
if (!isNaN(angle)) {
this.canvas.rotate(angle);
if (this.hitDetection) { this.hitContext.rotate(angle); }
}
// // Step 2: scale symbol such that pointRadius equals half the maximum symbol dimension.
scaling = 2.0 * style.pointRadius / Math.max(symbolBounds.getWidth(), symbolBounds.getHeight());
this.canvas.scale(scaling,scaling);
if (this.hitDetection) { this.hitContext.scale(scaling,scaling); }
// Step 1: center the symbol at the origin
cx = symbolBounds.getCenterLonLat().lon;
cy = symbolBounds.getCenterLonLat().lat;
this.canvas.translate(-cx,-cy);
if (this.hitDetection) { this.hitContext.translate(-cx,-cy); }
// Don't forget to scale stroke widths, because they are affected by canvas scale transformations as well(!)
// Alternative: scale symbol coordinates manually, so stroke width scaling is not needed anymore.
unscaledStrokeWidth = style.strokeWidth;
style.strokeWidth = unscaledStrokeWidth / scaling;
if (style.fill !== false) {
this.setCanvasStyle("fill", style);
this.canvas.beginPath();
for (i=0; i<symbol.length; i=i+2) {
x = symbol[i];
y = symbol[i+1];
if (i == 0) this.canvas.moveTo(x,y);
this.canvas.lineTo(x,y);
}
this.canvas.closePath();
this.canvas.fill();
if (this.hitDetection) {
this.setHitContextStyle("fill", featureId, style);
this.hitContext.beginPath();
for (i=0; i<symbol.length; i=i+2) {
x = symbol[i];
y = symbol[i+1];
if (i == 0) this.canvas.moveTo(x,y);
this.hitContext.lineTo(x,y);
}
this.hitContext.closePath();
this.hitContext.fill();
}
}
if (style.stroke !== false) {
this.setCanvasStyle("stroke", style);
this.canvas.beginPath();
for (i=0; i<symbol.length; i=i+2) {
x = symbol[i];
y = symbol[i+1];
if (i == 0) this.canvas.moveTo(x,y);
this.canvas.lineTo(x,y);
}
this.canvas.closePath();
this.canvas.stroke();
if (this.hitDetection) {
this.setHitContextStyle("stroke", featureId, style, scaling);
this.hitContext.beginPath();
for (i=0; i<symbol.length; i=i+2) {
x = symbol[i];
y = symbol[i+1];
if (i == 0) this.hitContext.moveTo(x,y);
this.hitContext.lineTo(x,y);
}
this.hitContext.closePath();
this.hitContext.stroke();
}
}
style.strokeWidth = unscaledStrokeWidth;
this.canvas.restore();
if (this.hitDetection) { this.hitContext.restore(); }
this.setCanvasStyle("reset");
},
/**
* Method: setCanvasStyle
* Prepare the canvas for drawing by setting various global settings.
*
* Parameters:
* type - {String} one of 'stroke', 'fill', or 'reset'
* style - {Object} Symbolizer hash
*/
setCanvasStyle: function(type, style) {
if (type === "fill") {
this.canvas.globalAlpha = style['fillOpacity'];
this.canvas.fillStyle = style['fillColor'];
} else if (type === "stroke") {
this.canvas.globalAlpha = style['strokeOpacity'];
this.canvas.strokeStyle = style['strokeColor'];
this.canvas.lineWidth = style['strokeWidth'];
} else {
this.canvas.globalAlpha = 0;
this.canvas.lineWidth = 1;
}
},
/**
* Method: featureIdToHex
* Convert a feature ID string into an RGB hex string.
*
* Parameters:
* featureId - {String} Feature id
*
* Returns:
* {String} RGB hex string.
*/
featureIdToHex: function(featureId) {
var id = Number(featureId.split("_").pop()) + 1; // zero for no feature
if (id >= 16777216) {
this.hitOverflow = id - 16777215;
id = id % 16777216 + 1;
}
var hex = "000000" + id.toString(16);
var len = hex.length;
hex = "#" + hex.substring(len-6, len);
return hex;
},
/**
* Method: setHitContextStyle
* Prepare the hit canvas for drawing by setting various global settings.
*
* Parameters:
* type - {String} one of 'stroke', 'fill', or 'reset'
* featureId - {String} The feature id.
* symbolizer - {<OpenLayers.Symbolizer>} The symbolizer.
*/
setHitContextStyle: function(type, featureId, symbolizer, strokeScaling) {
var hex = this.featureIdToHex(featureId);
if (type == "fill") {
this.hitContext.globalAlpha = 1.0;
this.hitContext.fillStyle = hex;
} else if (type == "stroke") {
this.hitContext.globalAlpha = 1.0;
this.hitContext.strokeStyle = hex;
// bump up stroke width to deal with antialiasing. If strokeScaling is defined, we're rendering a symbol
// on a transformed canvas, so the antialias width bump has to scale as well.
if (typeof strokeScaling === "undefined") {
this.hitContext.lineWidth = symbolizer.strokeWidth + 2;
} else {
if (!isNaN(strokeScaling)) { this.hitContext.lineWidth = symbolizer.strokeWidth + 2.0 / strokeScaling; }
}
} else {
this.hitContext.globalAlpha = 0;
this.hitContext.lineWidth = 1;
}
},
/**
* Method: drawPoint
* This method is only called by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawPoint: function(geometry, style, featureId) {
if(style.graphic !== false) {
if(style.externalGraphic) {
this.drawExternalGraphic(geometry, style, featureId);
} else if (style.graphicName && (style.graphicName != "circle")) {
this.drawNamedSymbol(geometry, style, featureId);
} else {
var pt = this.getLocalXY(geometry);
var p0 = pt[0];
var p1 = pt[1];
if(!isNaN(p0) && !isNaN(p1)) {
var twoPi = Math.PI*2;
var radius = style.pointRadius;
if(style.fill !== false) {
this.setCanvasStyle("fill", style);
this.canvas.beginPath();
this.canvas.arc(p0, p1, radius, 0, twoPi, true);
this.canvas.fill();
if (this.hitDetection) {
this.setHitContextStyle("fill", featureId, style);
this.hitContext.beginPath();
this.hitContext.arc(p0, p1, radius, 0, twoPi, true);
this.hitContext.fill();
}
}
if(style.stroke !== false) {
this.setCanvasStyle("stroke", style);
this.canvas.beginPath();
this.canvas.arc(p0, p1, radius, 0, twoPi, true);
this.canvas.stroke();
if (this.hitDetection) {
this.setHitContextStyle("stroke", featureId, style);
this.hitContext.beginPath();
this.hitContext.arc(p0, p1, radius, 0, twoPi, true);
this.hitContext.stroke();
}
this.setCanvasStyle("reset");
}
}
}
}
},
/**
* Method: drawLineString
* This method is only called by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawLineString: function(geometry, style, featureId) {
style = OpenLayers.Util.applyDefaults({fill: false}, style);
this.drawLinearRing(geometry, style, featureId);
},
/**
* Method: drawLinearRing
* This method is only called by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawLinearRing: function(geometry, style, featureId) {
if (style.fill !== false) {
this.setCanvasStyle("fill", style);
this.renderPath(this.canvas, geometry, style, featureId, "fill");
if (this.hitDetection) {
this.setHitContextStyle("fill", featureId, style);
this.renderPath(this.hitContext, geometry, style, featureId, "fill");
}
}
if (style.stroke !== false) {
this.setCanvasStyle("stroke", style);
this.renderPath(this.canvas, geometry, style, featureId, "stroke");
if (this.hitDetection) {
this.setHitContextStyle("stroke", featureId, style);
this.renderPath(this.hitContext, geometry, style, featureId, "stroke");
}
}
this.setCanvasStyle("reset");
},
/**
* Method: renderPath
* Render a path with stroke and optional fill.
*/
renderPath: function(context, geometry, style, featureId, type) {
var components = geometry.components;
var len = components.length;
context.beginPath();
var start = this.getLocalXY(components[0]);
var x = start[0];
var y = start[1];
if (!isNaN(x) && !isNaN(y)) {
context.moveTo(start[0], start[1]);
for (var i=1; i<len; ++i) {
var pt = this.getLocalXY(components[i]);
context.lineTo(pt[0], pt[1]);
}
if (type === "fill") {
context.fill();
} else {
context.stroke();
}
}
},
/**
* Method: drawPolygon
* This method is only called by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*/
drawPolygon: function(geometry, style, featureId) {
var components = geometry.components;
var len = components.length;
this.drawLinearRing(components[0], style, featureId);
// erase inner rings
for (var i=1; i<len; ++i) {
/**
* Note that this is overly agressive. Here we punch holes through
* all previously rendered features on the same canvas. A better
* solution for polygons with interior rings would be to draw the
* polygon on a sketch canvas first. We could erase all holes
* there and then copy the drawing to the layer canvas.
* TODO: http://trac.osgeo.org/openlayers/ticket/3130
*/
this.canvas.globalCompositeOperation = "destination-out";
if (this.hitDetection) {
this.hitContext.globalCompositeOperation = "destination-out";
}
this.drawLinearRing(
components[i],
OpenLayers.Util.applyDefaults({stroke: false, fillOpacity: 1.0}, style),
featureId
);
this.canvas.globalCompositeOperation = "source-over";
if (this.hitDetection) {
this.hitContext.globalCompositeOperation = "source-over";
}
this.drawLinearRing(
components[i],
OpenLayers.Util.applyDefaults({fill: false}, style),
featureId
);
}
},
/**
* Method: drawText
* This method is only called by the renderer itself.
*
* Parameters:
* location - {<OpenLayers.Point>}
* style - {Object}
*/
drawText: function(location, style) {
var pt = this.getLocalXY(location);
this.setCanvasStyle("reset");
this.canvas.fillStyle = style.fontColor;
this.canvas.globalAlpha = style.fontOpacity || 1.0;
var fontStyle = [style.fontStyle ? style.fontStyle : "normal",
"normal", // "font-variant" not supported
style.fontWeight ? style.fontWeight : "normal",
style.fontSize ? style.fontSize : "1em",
style.fontFamily ? style.fontFamily : "sans-serif"].join(" ");
var labelRows = style.label.split('\n');
var numRows = labelRows.length;
if (this.canvas.fillText) {
// HTML5
this.canvas.font = fontStyle;
this.canvas.textAlign =
OpenLayers.Renderer.Canvas.LABEL_ALIGN[style.labelAlign[0]] ||
"center";
this.canvas.textBaseline =
OpenLayers.Renderer.Canvas.LABEL_ALIGN[style.labelAlign[1]] ||
"middle";
var vfactor =
OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[1]];
if (vfactor == null) {
vfactor = -.5;
}
var lineHeight =
this.canvas.measureText('Mg').height ||
this.canvas.measureText('xx').width;
pt[1] += lineHeight*vfactor*(numRows-1);
for (var i = 0; i < numRows; i++) {
if (style.labelOutlineWidth) {
this.canvas.save();
this.canvas.globalAlpha = style.labelOutlineOpacity || style.fontOpacity || 1.0;
this.canvas.strokeStyle = style.labelOutlineColor;
this.canvas.lineWidth = style.labelOutlineWidth;
this.canvas.strokeText(labelRows[i], pt[0], pt[1] + (lineHeight*i) + 1);
this.canvas.restore();
}
this.canvas.fillText(labelRows[i], pt[0], pt[1] + (lineHeight*i));
}
} else if (this.canvas.mozDrawText) {
// Mozilla pre-Gecko1.9.1 (<FF3.1)
this.canvas.mozTextStyle = fontStyle;
// No built-in text alignment, so we measure and adjust the position
var hfactor =
OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[0]];
if (hfactor == null) {
hfactor = -.5;
}
var vfactor =
OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[1]];
if (vfactor == null) {
vfactor = -.5;
}
var lineHeight = this.canvas.mozMeasureText('xx');
pt[1] += lineHeight*(1 + (vfactor*numRows));
for (var i = 0; i < numRows; i++) {
var x = pt[0] + (hfactor*this.canvas.mozMeasureText(labelRows[i]));
var y = pt[1] + (i*lineHeight);
this.canvas.translate(x, y);
this.canvas.mozDrawText(labelRows[i]);
this.canvas.translate(-x, -y);
}
}
this.setCanvasStyle("reset");
},
/**
* Method: getLocalXY
* transform geographic xy into pixel xy
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*/
getLocalXY: function(point) {
var resolution = this.getResolution();
var extent = this.extent;
var x = ((point.x - this.featureDx) / resolution + (-extent.left / resolution));
var y = ((extent.top / resolution) - point.y / resolution);
return [x, y];
},
/**
* Method: clear
* Clear all vectors from the renderer.
*/
clear: function() {
var height = this.root.height;
var width = this.root.width;
this.canvas.clearRect(0, 0, width, height);
this.features = {};
if (this.hitDetection) {
this.hitContext.clearRect(0, 0, width, height);
}
},
/**
* Method: getFeatureIdFromEvent
* Returns a feature id from an event on the renderer.
*
* Parameters:
* evt - {<OpenLayers.Event>}
*
* Returns:
* {<OpenLayers.Feature.Vector} A feature or undefined. This method returns a
* feature instead of a feature id to avoid an unnecessary lookup on the
* layer.
*/
getFeatureIdFromEvent: function(evt) {
var featureId, feature;
if (this.hitDetection && this.root.style.display !== "none") {
// this dragging check should go in the feature handler
if (!this.map.dragging) {
var xy = evt.xy;
var x = xy.x | 0;
var y = xy.y | 0;
var data = this.hitContext.getImageData(x, y, 1, 1).data;
if (data[3] === 255) { // antialiased
var id = data[2] + (256 * (data[1] + (256 * data[0])));
if (id) {
featureId = "OpenLayers_Feature_Vector_" + (id - 1 + this.hitOverflow);
try {
feature = this.features[featureId][0];
} catch(err) {
// Because of antialiasing on the canvas, when the hit location is at a point where the edge of
// one symbol intersects the interior of another symbol, a wrong hit color (and therefore id) results.
// todo: set Antialiasing = 'off' on the hitContext as soon as browsers allow it.
}
}
}
}
}
return feature;
},
/**
* Method: eraseFeatures
* This is called by the layer to erase features; removes the feature from
* the list, then redraws the layer.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)}
*/
eraseFeatures: function(features) {
if(!(OpenLayers.Util.isArray(features))) {
features = [features];
}
for(var i=0; i<features.length; ++i) {
delete this.features[features[i].id];
}
this.redraw();
},
/**
* Method: redraw
* The real 'meat' of the function: any time things have changed,
* redraw() can be called to loop over all the data and (you guessed
* it) redraw it. Unlike Elements-based Renderers, we can't interact
* with things once they're drawn, to remove them, for example, so
* instead we have to just clear everything and draw from scratch.
*/
redraw: function() {
if (!this.locked) {
var height = this.root.height;
var width = this.root.width;
this.canvas.clearRect(0, 0, width, height);
if (this.hitDetection) {
this.hitContext.clearRect(0, 0, width, height);
}
var labelMap = [];
var feature, geometry, style;
var worldBounds = (this.map.baseLayer && this.map.baseLayer.wrapDateLine) && this.map.getMaxExtent();
for (var id in this.features) {
if (!this.features.hasOwnProperty(id)) { continue; }
feature = this.features[id][0];
geometry = feature.geometry;
this.calculateFeatureDx(geometry.getBounds(), worldBounds);
style = this.features[id][1];
this.drawGeometry(geometry, style, feature.id);
if(style.label) {
labelMap.push([feature, style]);
}
}
var item;
for (var i=0, len=labelMap.length; i<len; ++i) {
item = labelMap[i];
this.drawText(item[0].geometry.getCentroid(), item[1]);
}
}
},
CLASS_NAME: "OpenLayers.Renderer.Canvas"
});
/**
* Constant: OpenLayers.Renderer.Canvas.LABEL_ALIGN
* {Object}
*/
OpenLayers.Renderer.Canvas.LABEL_ALIGN = {
"l": "left",
"r": "right",
"t": "top",
"b": "bottom"
};
/**
* Constant: OpenLayers.Renderer.Canvas.LABEL_FACTOR
* {Object}
*/
OpenLayers.Renderer.Canvas.LABEL_FACTOR = {
"l": 0,
"r": -1,
"t": 0,
"b": -1
};
/**
* Constant: OpenLayers.Renderer.Canvas.drawImageScaleFactor
* {Number} Scale factor to apply to the canvas drawImage arguments. This
* is always 1 except for Android 2.1 devices, to work around
* http://code.google.com/p/android/issues/detail?id=5141.
*/
OpenLayers.Renderer.Canvas.drawImageScaleFactor = null;
/* ======================================================================
OpenLayers/Handler.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Events.js
*/
/**
* Class: OpenLayers.Handler
* Base class to construct a higher-level handler for event sequences. All
* handlers have activate and deactivate methods. In addition, they have
* methods named like browser events. When a handler is activated, any
* additional methods named like a browser event is registered as a
* listener for the corresponding event. When a handler is deactivated,
* those same methods are unregistered as event listeners.
*
* Handlers also typically have a callbacks object with keys named like
* the abstracted events or event sequences that they are in charge of
* handling. The controls that wrap handlers define the methods that
* correspond to these abstract events - so instead of listening for
* individual browser events, they only listen for the abstract events
* defined by the handler.
*
* Handlers are created by controls, which ultimately have the responsibility
* of making changes to the the state of the application. Handlers
* themselves may make temporary changes, but in general are expected to
* return the application in the same state that they found it.
*/
OpenLayers.Handler = OpenLayers.Class({
/**
* Property: id
* {String}
*/
id: null,
/**
* APIProperty: control
* {<OpenLayers.Control>}. The control that initialized this handler. The
* control is assumed to have a valid map property - that map is used
* in the handler's own setMap method.
*/
control: null,
/**
* Property: map
* {<OpenLayers.Map>}
*/
map: null,
/**
* APIProperty: keyMask
* {Integer} Use bitwise operators and one or more of the OpenLayers.Handler
* constants to construct a keyMask. The keyMask is used by
* <checkModifiers>. If the keyMask matches the combination of keys
* down on an event, checkModifiers returns true.
*
* Example:
* (code)
* // handler only responds if the Shift key is down
* handler.keyMask = OpenLayers.Handler.MOD_SHIFT;
*
* // handler only responds if Ctrl-Shift is down
* handler.keyMask = OpenLayers.Handler.MOD_SHIFT |
* OpenLayers.Handler.MOD_CTRL;
* (end)
*/
keyMask: null,
/**
* Property: active
* {Boolean}
*/
active: false,
/**
* Property: evt
* {Event} This property references the last event handled by the handler.
* Note that this property is not part of the stable API. Use of the
* evt property should be restricted to controls in the library
* or other applications that are willing to update with changes to
* the OpenLayers code.
*/
evt: null,
/**
* Property: touch
* {Boolean} Indicates the support of touch events. When touch events are
* started touch will be true and all mouse related listeners will do
* nothing.
*/
touch: false,
/**
* Constructor: OpenLayers.Handler
* Construct a handler.
*
* Parameters:
* control - {<OpenLayers.Control>} The control that initialized this
* handler. The control is assumed to have a valid map property; that
* map is used in the handler's own setMap method. If a map property
* is present in the options argument it will be used instead.
* callbacks - {Object} An object whose properties correspond to abstracted
* events or sequences of browser events. The values for these
* properties are functions defined by the control that get called by
* the handler.
* options - {Object} An optional object whose properties will be set on
* the handler.
*/
initialize: function(control, callbacks, options) {
OpenLayers.Util.extend(this, options);
this.control = control;
this.callbacks = callbacks;
var map = this.map || control.map;
if (map) {
this.setMap(map);
}
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
},
/**
* Method: setMap
*/
setMap: function (map) {
this.map = map;
},
/**
* Method: checkModifiers
* Check the keyMask on the handler. If no <keyMask> is set, this always
* returns true. If a <keyMask> is set and it matches the combination
* of keys down on an event, this returns true.
*
* Returns:
* {Boolean} The keyMask matches the keys down on an event.
*/
checkModifiers: function (evt) {
if(this.keyMask == null) {
return true;
}
/* calculate the keyboard modifier mask for this event */
var keyModifiers =
(evt.shiftKey ? OpenLayers.Handler.MOD_SHIFT : 0) |
(evt.ctrlKey ? OpenLayers.Handler.MOD_CTRL : 0) |
(evt.altKey ? OpenLayers.Handler.MOD_ALT : 0) |
(evt.metaKey ? OpenLayers.Handler.MOD_META : 0);
/* if it differs from the handler object's key mask,
bail out of the event handler */
return (keyModifiers == this.keyMask);
},
/**
* APIMethod: activate
* Turn on the handler. Returns false if the handler was already active.
*
* Returns:
* {Boolean} The handler was activated.
*/
activate: function() {
if(this.active) {
return false;
}
// register for event handlers defined on this class.
var events = OpenLayers.Events.prototype.BROWSER_EVENTS;
for (var i=0, len=events.length; i<len; i++) {
if (this[events[i]]) {
this.register(events[i], this[events[i]]);
}
}
this.active = true;
return true;
},
/**
* APIMethod: deactivate
* Turn off the handler. Returns false if the handler was already inactive.
*
* Returns:
* {Boolean} The handler was deactivated.
*/
deactivate: function() {
if(!this.active) {
return false;
}
// unregister event handlers defined on this class.
var events = OpenLayers.Events.prototype.BROWSER_EVENTS;
for (var i=0, len=events.length; i<len; i++) {
if (this[events[i]]) {
this.unregister(events[i], this[events[i]]);
}
}
this.touch = false;
this.active = false;
return true;
},
/**
* Method: startTouch
* Start touch events, this method must be called by subclasses in
* "touchstart" method. When touch events are started <touch> will be
* true and all mouse related listeners will do nothing.
*/
startTouch: function() {
if (!this.touch) {
this.touch = true;
var events = [
"mousedown", "mouseup", "mousemove", "click", "dblclick",
"mouseout"
];
for (var i=0, len=events.length; i<len; i++) {
if (this[events[i]]) {
this.unregister(events[i], this[events[i]]);
}
}
}
},
/**
* Method: callback
* Trigger the control's named callback with the given arguments
*
* Parameters:
* name - {String} The key for the callback that is one of the properties
* of the handler's callbacks object.
* args - {Array(*)} An array of arguments (any type) with which to call
* the callback (defined by the control).
*/
callback: function (name, args) {
if (name && this.callbacks[name]) {
this.callbacks[name].apply(this.control, args);
}
},
/**
* Method: register
* register an event on the map
*/
register: function (name, method) {
// TODO: deal with registerPriority in 3.0
this.map.events.registerPriority(name, this, method);
this.map.events.registerPriority(name, this, this.setEvent);
},
/**
* Method: unregister
* unregister an event from the map
*/
unregister: function (name, method) {
this.map.events.unregister(name, this, method);
this.map.events.unregister(name, this, this.setEvent);
},
/**
* Method: setEvent
* With each registered browser event, the handler sets its own evt
* property. This property can be accessed by controls if needed
* to get more information about the event that the handler is
* processing.
*
* This allows modifier keys on the event to be checked (alt, shift, ctrl,
* and meta cannot be checked with the keyboard handler). For a
* control to determine which modifier keys are associated with the
* event that a handler is currently processing, it should access
* (code)handler.evt.altKey || handler.evt.shiftKey ||
* handler.evt.ctrlKey || handler.evt.metaKey(end).
*
* Parameters:
* evt - {Event} The browser event.
*/
setEvent: function(evt) {
this.evt = evt;
return true;
},
/**
* Method: destroy
* Deconstruct the handler.
*/
destroy: function () {
// unregister event listeners
this.deactivate();
// eliminate circular references
this.control = this.map = null;
},
CLASS_NAME: "OpenLayers.Handler"
});
/**
* Constant: OpenLayers.Handler.MOD_NONE
* If set as the <keyMask>, <checkModifiers> returns false if any key is down.
*/
OpenLayers.Handler.MOD_NONE = 0;
/**
* Constant: OpenLayers.Handler.MOD_SHIFT
* If set as the <keyMask>, <checkModifiers> returns false if Shift is down.
*/
OpenLayers.Handler.MOD_SHIFT = 1;
/**
* Constant: OpenLayers.Handler.MOD_CTRL
* If set as the <keyMask>, <checkModifiers> returns false if Ctrl is down.
*/
OpenLayers.Handler.MOD_CTRL = 2;
/**
* Constant: OpenLayers.Handler.MOD_ALT
* If set as the <keyMask>, <checkModifiers> returns false if Alt is down.
*/
OpenLayers.Handler.MOD_ALT = 4;
/**
* Constant: OpenLayers.Handler.MOD_META
* If set as the <keyMask>, <checkModifiers> returns false if Cmd is down.
*/
OpenLayers.Handler.MOD_META = 8;
/* ======================================================================
OpenLayers/Handler/Drag.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
*/
/**
* Class: OpenLayers.Handler.Drag
* The drag handler is used to deal with sequences of browser events related
* to dragging. The handler is used by controls that want to know when
* a drag sequence begins, when a drag is happening, and when it has
* finished.
*
* Controls that use the drag handler typically construct it with callbacks
* for 'down', 'move', and 'done'. Callbacks for these keys are called
* when the drag begins, with each move, and when the drag is done. In
* addition, controls can have callbacks keyed to 'up' and 'out' if they
* care to differentiate between the types of events that correspond with
* the end of a drag sequence. If no drag actually occurs (no mouse move)
* the 'down' and 'up' callbacks will be called, but not the 'done'
* callback.
*
* Create a new drag handler with the <OpenLayers.Handler.Drag> constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: started
* {Boolean} When a mousedown or touchstart event is received, we want to
* record it, but not set 'dragging' until the mouse moves after starting.
*/
started: false,
/**
* Property: stopDown
* {Boolean} Stop propagation of mousedown events from getting to listeners
* on the same element. Default is true.
*/
stopDown: true,
/**
* Property: dragging
* {Boolean}
*/
dragging: false,
/**
* Property: last
* {<OpenLayers.Pixel>} The last pixel location of the drag.
*/
last: null,
/**
* Property: start
* {<OpenLayers.Pixel>} The first pixel location of the drag.
*/
start: null,
/**
* Property: lastMoveEvt
* {Object} The last mousemove event that occurred. Used to
* position the map correctly when our "delay drag"
* timeout expired.
*/
lastMoveEvt: null,
/**
* Property: oldOnselectstart
* {Function}
*/
oldOnselectstart: null,
/**
* Property: interval
* {Integer} In order to increase performance, an interval (in
* milliseconds) can be set to reduce the number of drag events
* called. If set, a new drag event will not be set until the
* interval has passed.
* Defaults to 0, meaning no interval.
*/
interval: 0,
/**
* Property: timeoutId
* {String} The id of the timeout used for the mousedown interval.
* This is "private", and should be left alone.
*/
timeoutId: null,
/**
* APIProperty: documentDrag
* {Boolean} If set to true, the handler will also handle mouse moves when
* the cursor has moved out of the map viewport. Default is false.
*/
documentDrag: false,
/**
* Property: documentEvents
* {Boolean} Are we currently observing document events?
*/
documentEvents: null,
/**
* Constructor: OpenLayers.Handler.Drag
* Returns OpenLayers.Handler.Drag
*
* Parameters:
* control - {<OpenLayers.Control>} The control that is making use of
* this handler. If a handler is being used without a control, the
* handlers setMap method must be overridden to deal properly with
* the map.
* callbacks - {Object} An object containing a single function to be
* called when the drag operation is finished. The callback should
* expect to recieve a single argument, the pixel location of the event.
* Callbacks for 'move' and 'done' are supported. You can also speficy
* callbacks for 'down', 'up', and 'out' to respond to those events.
* options - {Object}
*/
initialize: function(control, callbacks, options) {
OpenLayers.Handler.prototype.initialize.apply(this, arguments);
if (this.documentDrag === true) {
var me = this;
this._docMove = function(evt) {
me.mousemove({
xy: {x: evt.clientX, y: evt.clientY},
element: document
});
};
this._docUp = function(evt) {
me.mouseup({xy: {x: evt.clientX, y: evt.clientY}});
};
}
},
/**
* Method: dragstart
* This private method is factorized from mousedown and touchstart methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragstart: function (evt) {
var propagate = true;
this.dragging = false;
if (this.checkModifiers(evt) &&
(OpenLayers.Event.isLeftClick(evt) ||
OpenLayers.Event.isSingleTouch(evt))) {
this.started = true;
this.start = evt.xy;
this.last = evt.xy;
OpenLayers.Element.addClass(
this.map.viewPortDiv, "olDragDown"
);
this.down(evt);
this.callback("down", [evt.xy]);
// prevent document dragging
OpenLayers.Event.preventDefault(evt);
if(!this.oldOnselectstart) {
this.oldOnselectstart = document.onselectstart ?
document.onselectstart : OpenLayers.Function.True;
}
document.onselectstart = OpenLayers.Function.False;
propagate = !this.stopDown;
} else {
this.started = false;
this.start = null;
this.last = null;
}
return propagate;
},
/**
* Method: dragmove
* This private method is factorized from mousemove and touchmove methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragmove: function (evt) {
this.lastMoveEvt = evt;
if (this.started && !this.timeoutId && (evt.xy.x != this.last.x ||
evt.xy.y != this.last.y)) {
if(this.documentDrag === true && this.documentEvents) {
if(evt.element === document) {
this.adjustXY(evt);
// do setEvent manually because the documentEvents are not
// registered with the map
this.setEvent(evt);
} else {
this.removeDocumentEvents();
}
}
if (this.interval > 0) {
this.timeoutId = setTimeout(
OpenLayers.Function.bind(this.removeTimeout, this),
this.interval);
}
this.dragging = true;
this.move(evt);
this.callback("move", [evt.xy]);
if(!this.oldOnselectstart) {
this.oldOnselectstart = document.onselectstart;
document.onselectstart = OpenLayers.Function.False;
}
this.last = evt.xy;
}
return true;
},
/**
* Method: dragend
* This private method is factorized from mouseup and touchend methods
*
* Parameters:
* evt - {Event} The event
*
* Returns:
* {Boolean} Let the event propagate.
*/
dragend: function (evt) {
if (this.started) {
if(this.documentDrag === true && this.documentEvents) {
this.adjustXY(evt);
this.removeDocumentEvents();
}
var dragged = (this.start != this.last);
this.started = false;
this.dragging = false;
OpenLayers.Element.removeClass(
this.map.viewPortDiv, "olDragDown"
);
this.up(evt);
this.callback("up", [evt.xy]);
if(dragged) {
this.callback("done", [evt.xy]);
}
document.onselectstart = this.oldOnselectstart;
}
return true;
},
/**
* The four methods below (down, move, up, and out) are used by subclasses
* to do their own processing related to these mouse events.
*/
/**
* Method: down
* This method is called during the handling of the mouse down event.
* Subclasses can do their own processing here.
*
* Parameters:
* evt - {Event} The mouse down event
*/
down: function(evt) {
},
/**
* Method: move
* This method is called during the handling of the mouse move event.
* Subclasses can do their own processing here.
*
* Parameters:
* evt - {Event} The mouse move event
*
*/
move: function(evt) {
},
/**
* Method: up
* This method is called during the handling of the mouse up event.
* Subclasses can do their own processing here.
*
* Parameters:
* evt - {Event} The mouse up event
*/
up: function(evt) {
},
/**
* Method: out
* This method is called during the handling of the mouse out event.
* Subclasses can do their own processing here.
*
* Parameters:
* evt - {Event} The mouse out event
*/
out: function(evt) {
},
/**
* The methods below are part of the magic of event handling. Because
* they are named like browser events, they are registered as listeners
* for the events they represent.
*/
/**
* Method: mousedown
* Handle mousedown events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mousedown: function(evt) {
return this.dragstart(evt);
},
/**
* Method: touchstart
* Handle touchstart events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchstart: function(evt) {
this.startTouch();
return this.dragstart(evt);
},
/**
* Method: mousemove
* Handle mousemove events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mousemove: function(evt) {
return this.dragmove(evt);
},
/**
* Method: touchmove
* Handle touchmove events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchmove: function(evt) {
return this.dragmove(evt);
},
/**
* Method: removeTimeout
* Private. Called by mousemove() to remove the drag timeout.
*/
removeTimeout: function() {
this.timeoutId = null;
// if timeout expires while we're still dragging (mouseup
// hasn't occurred) then call mousemove to move to the
// correct position
if(this.dragging) {
this.mousemove(this.lastMoveEvt);
}
},
/**
* Method: mouseup
* Handle mouseup events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mouseup: function(evt) {
return this.dragend(evt);
},
/**
* Method: touchend
* Handle touchend events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchend: function(evt) {
// override evt.xy with last position since touchend does not have
// any touch position
evt.xy = this.last;
return this.dragend(evt);
},
/**
* Method: mouseout
* Handle mouseout events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
mouseout: function (evt) {
if (this.started && OpenLayers.Util.mouseLeft(evt, this.map.viewPortDiv)) {
if(this.documentDrag === true) {
this.addDocumentEvents();
} else {
var dragged = (this.start != this.last);
this.started = false;
this.dragging = false;
OpenLayers.Element.removeClass(
this.map.viewPortDiv, "olDragDown"
);
this.out(evt);
this.callback("out", []);
if(dragged) {
this.callback("done", [evt.xy]);
}
if(document.onselectstart) {
document.onselectstart = this.oldOnselectstart;
}
}
}
return true;
},
/**
* Method: click
* The drag handler captures the click event. If something else registers
* for clicks on the same element, its listener will not be called
* after a drag.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
click: function (evt) {
// let the click event propagate only if the mouse moved
return (this.start == this.last);
},
/**
* Method: activate
* Activate the handler.
*
* Returns:
* {Boolean} The handler was successfully activated.
*/
activate: function() {
var activated = false;
if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.dragging = false;
activated = true;
}
return activated;
},
/**
* Method: deactivate
* Deactivate the handler.
*
* Returns:
* {Boolean} The handler was successfully deactivated.
*/
deactivate: function() {
var deactivated = false;
if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
this.started = false;
this.dragging = false;
this.start = null;
this.last = null;
deactivated = true;
OpenLayers.Element.removeClass(
this.map.viewPortDiv, "olDragDown"
);
}
return deactivated;
},
/**
* Method: adjustXY
* Converts event coordinates that are relative to the document body to
* ones that are relative to the map viewport. The latter is the default in
* OpenLayers.
*
* Parameters:
* evt - {Object}
*/
adjustXY: function(evt) {
var pos = OpenLayers.Util.pagePosition(this.map.viewPortDiv);
evt.xy.x -= pos[0];
evt.xy.y -= pos[1];
},
/**
* Method: addDocumentEvents
* Start observing document events when documentDrag is true and the mouse
* cursor leaves the map viewport while dragging.
*/
addDocumentEvents: function() {
OpenLayers.Element.addClass(document.body, "olDragDown");
this.documentEvents = true;
OpenLayers.Event.observe(document, "mousemove", this._docMove);
OpenLayers.Event.observe(document, "mouseup", this._docUp);
},
/**
* Method: removeDocumentEvents
* Stops observing document events when documentDrag is true and the mouse
* cursor re-enters the map viewport while dragging.
*/
removeDocumentEvents: function() {
OpenLayers.Element.removeClass(document.body, "olDragDown");
this.documentEvents = false;
OpenLayers.Event.stopObserving(document, "mousemove", this._docMove);
OpenLayers.Event.stopObserving(document, "mouseup", this._docUp);
},
CLASS_NAME: "OpenLayers.Handler.Drag"
});
/* ======================================================================
OpenLayers/Handler/Keyboard.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
* @requires OpenLayers/Events.js
*/
/**
* Class: OpenLayers.handler.Keyboard
* A handler for keyboard events. Create a new instance with the
* <OpenLayers.Handler.Keyboard> constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Keyboard = OpenLayers.Class(OpenLayers.Handler, {
/* http://www.quirksmode.org/js/keys.html explains key x-browser
key handling quirks in pretty nice detail */
/**
* Constant: KEY_EVENTS
* keydown, keypress, keyup
*/
KEY_EVENTS: ["keydown", "keyup"],
/**
* Property: eventListener
* {Function}
*/
eventListener: null,
/**
* Property: observeElement
* {DOMElement|String} The DOM element on which we listen for
* key events. Default to the document.
*/
observeElement: null,
/**
* Constructor: OpenLayers.Handler.Keyboard
* Returns a new keyboard handler.
*
* Parameters:
* control - {<OpenLayers.Control>} The control that is making use of
* this handler. If a handler is being used without a control, the
* handlers setMap method must be overridden to deal properly with
* the map.
* callbacks - {Object} An object containing a single function to be
* called when the drag operation is finished. The callback should
* expect to recieve a single argument, the pixel location of the event.
* Callbacks for 'keydown', 'keypress', and 'keyup' are supported.
* options - {Object} Optional object whose properties will be set on the
* handler.
*/
initialize: function(control, callbacks, options) {
OpenLayers.Handler.prototype.initialize.apply(this, arguments);
// cache the bound event listener method so it can be unobserved later
this.eventListener = OpenLayers.Function.bindAsEventListener(
this.handleKeyEvent, this
);
},
/**
* Method: destroy
*/
destroy: function() {
this.deactivate();
this.eventListener = null;
OpenLayers.Handler.prototype.destroy.apply(this, arguments);
},
/**
* Method: activate
*/
activate: function() {
if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.observeElement = this.observeElement || document;
for (var i=0, len=this.KEY_EVENTS.length; i<len; i++) {
OpenLayers.Event.observe(
this.observeElement, this.KEY_EVENTS[i], this.eventListener);
}
return true;
} else {
return false;
}
},
/**
* Method: deactivate
*/
deactivate: function() {
var deactivated = false;
if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
for (var i=0, len=this.KEY_EVENTS.length; i<len; i++) {
OpenLayers.Event.stopObserving(
this.observeElement, this.KEY_EVENTS[i], this.eventListener);
}
deactivated = true;
}
return deactivated;
},
/**
* Method: handleKeyEvent
*/
handleKeyEvent: function (evt) {
if (this.checkModifiers(evt)) {
this.callback(evt.type, [evt]);
}
},
CLASS_NAME: "OpenLayers.Handler.Keyboard"
});
/* ======================================================================
OpenLayers/Control/ModifyFeature.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Handler/Drag.js
* @requires OpenLayers/Handler/Keyboard.js
*/
/**
* Class: OpenLayers.Control.ModifyFeature
* Control to modify features. When activated, a click renders the vertices
* of a feature - these vertices can then be dragged. By default, the
* delete key will delete the vertex under the mouse. New features are
* added by dragging "virtual vertices" between vertices. Create a new
* control with the <OpenLayers.Control.ModifyFeature> constructor.
*
* Inherits From:
* - <OpenLayers.Control>
*/
OpenLayers.Control.ModifyFeature = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: documentDrag
* {Boolean} If set to true, dragging vertices will continue even if the
* mouse cursor leaves the map viewport. Default is false.
*/
documentDrag: false,
/**
* APIProperty: geometryTypes
* {Array(String)} To restrict modification to a limited set of geometry
* types, send a list of strings corresponding to the geometry class
* names.
*/
geometryTypes: null,
/**
* APIProperty: clickout
* {Boolean} Unselect features when clicking outside any feature.
* Default is true.
*/
clickout: true,
/**
* APIProperty: toggle
* {Boolean} Unselect a selected feature on click.
* Default is true.
*/
toggle: true,
/**
* APIProperty: standalone
* {Boolean} Set to true to create a control without SelectFeature
* capabilities. Default is false. If standalone is true, to modify
* a feature, call the <selectFeature> method with the target feature.
* Note that you must call the <unselectFeature> method to finish
* feature modification in standalone mode (before starting to modify
* another feature).
*/
standalone: false,
/**
* Property: layer
* {<OpenLayers.Layer.Vector>}
*/
layer: null,
/**
* Property: feature
* {<OpenLayers.Feature.Vector>} Feature currently available for modification.
*/
feature: null,
/**
* Property: vertex
* {<OpenLayers.Feature.Vector>} Vertex currently being modified.
*/
vertex: null,
/**
* Property: vertices
* {Array(<OpenLayers.Feature.Vector>)} Verticies currently available
* for dragging.
*/
vertices: null,
/**
* Property: virtualVertices
* {Array(<OpenLayers.Feature.Vector>)} Virtual vertices in the middle
* of each edge.
*/
virtualVertices: null,
/**
* Property: handlers
* {Object}
*/
handlers: null,
/**
* APIProperty: deleteCodes
* {Array(Integer)} Keycodes for deleting verticies. Set to null to disable
* vertex deltion by keypress. If non-null, keypresses with codes
* in this array will delete vertices under the mouse. Default
* is 46 and 68, the 'delete' and lowercase 'd' keys.
*/
deleteCodes: null,
/**
* APIProperty: virtualStyle
* {Object} A symbolizer to be used for virtual vertices.
*/
virtualStyle: null,
/**
* APIProperty: vertexRenderIntent
* {String} The renderIntent to use for vertices. If no <virtualStyle> is
* provided, this renderIntent will also be used for virtual vertices, with
* a fillOpacity and strokeOpacity of 0.3. Default is null, which means
* that the layer's default style will be used for vertices.
*/
vertexRenderIntent: null,
/**
* APIProperty: mode
* {Integer} Bitfields specifying the modification mode. Defaults to
* OpenLayers.Control.ModifyFeature.RESHAPE. To set the mode to a
* combination of options, use the | operator. For example, to allow
* the control to both resize and rotate features, use the following
* syntax
* (code)
* control.mode = OpenLayers.Control.ModifyFeature.RESIZE |
* OpenLayers.Control.ModifyFeature.ROTATE;
* (end)
*/
mode: null,
/**
* APIProperty: createVertices
* {Boolean} Create new vertices by dragging the virtual vertices
* in the middle of each edge. Default is true.
*/
createVertices: true,
/**
* Property: modified
* {Boolean} The currently selected feature has been modified.
*/
modified: false,
/**
* Property: radiusHandle
* {<OpenLayers.Feature.Vector>} A handle for rotating/resizing a feature.
*/
radiusHandle: null,
/**
* Property: dragHandle
* {<OpenLayers.Feature.Vector>} A handle for dragging a feature.
*/
dragHandle: null,
/**
* APIProperty: onModificationStart
* {Function} *Deprecated*. Register for "beforefeaturemodified" instead.
* The "beforefeaturemodified" event is triggered on the layer before
* any modification begins.
*
* Optional function to be called when a feature is selected
* to be modified. The function should expect to be called with a
* feature. This could be used for example to allow to lock the
* feature on server-side.
*/
onModificationStart: function() {},
/**
* APIProperty: onModification
* {Function} *Deprecated*. Register for "featuremodified" instead.
* The "featuremodified" event is triggered on the layer with each
* feature modification.
*
* Optional function to be called when a feature has been
* modified. The function should expect to be called with a feature.
*/
onModification: function() {},
/**
* APIProperty: onModificationEnd
* {Function} *Deprecated*. Register for "afterfeaturemodified" instead.
* The "afterfeaturemodified" event is triggered on the layer after
* a feature has been modified.
*
* Optional function to be called when a feature is finished
* being modified. The function should expect to be called with a
* feature.
*/
onModificationEnd: function() {},
/**
* Constructor: OpenLayers.Control.ModifyFeature
* Create a new modify feature control.
*
* Parameters:
* layer - {<OpenLayers.Layer.Vector>} Layer that contains features that
* will be modified.
* options - {Object} Optional object whose properties will be set on the
* control.
*/
initialize: function(layer, options) {
options = options || {};
this.layer = layer;
this.vertices = [];
this.virtualVertices = [];
this.virtualStyle = OpenLayers.Util.extend({},
this.layer.style ||
this.layer.styleMap.createSymbolizer(null, options.vertexRenderIntent)
);
this.virtualStyle.fillOpacity = 0.3;
this.virtualStyle.strokeOpacity = 0.3;
this.deleteCodes = [46, 68];
this.mode = OpenLayers.Control.ModifyFeature.RESHAPE;
OpenLayers.Control.prototype.initialize.apply(this, [options]);
if(!(OpenLayers.Util.isArray(this.deleteCodes))) {
this.deleteCodes = [this.deleteCodes];
}
// configure the drag handler
var dragCallbacks = {
down: function(pixel) {
this.vertex = null;
var feature = this.layer.getFeatureFromEvent(
this.handlers.drag.evt);
if (feature) {
this.dragStart(feature);
} else if (this.clickout) {
this._unselect = this.feature;
}
},
move: function(pixel) {
delete this._unselect;
if (this.vertex) {
this.dragVertex(this.vertex, pixel);
}
},
up: function() {
this.handlers.drag.stopDown = false;
if (this._unselect) {
this.unselectFeature(this._unselect);
delete this._unselect;
}
},
done: function(pixel) {
if (this.vertex) {
this.dragComplete(this.vertex);
}
}
};
var dragOptions = {
documentDrag: this.documentDrag,
stopDown: false
};
// configure the keyboard handler
var keyboardOptions = {
keydown: this.handleKeypress
};
this.handlers = {
keyboard: new OpenLayers.Handler.Keyboard(this, keyboardOptions),
drag: new OpenLayers.Handler.Drag(this, dragCallbacks, dragOptions)
};
},
/**
* APIMethod: destroy
* Take care of things that are not handled in superclass.
*/
destroy: function() {
if (this.map) {
this.map.events.un({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
}
this.layer = null;
OpenLayers.Control.prototype.destroy.apply(this, []);
},
/**
* APIMethod: activate
* Activate the control.
*
* Returns:
* {Boolean} Successfully activated the control.
*/
activate: function() {
this.moveLayerToTop();
this.map.events.on({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
return (this.handlers.keyboard.activate() &&
this.handlers.drag.activate() &&
OpenLayers.Control.prototype.activate.apply(this, arguments));
},
/**
* APIMethod: deactivate
* Deactivate the control.
*
* Returns:
* {Boolean} Successfully deactivated the control.
*/
deactivate: function() {
var deactivated = false;
// the return from the controls is unimportant in this case
if(OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
this.moveLayerBack();
this.map.events.un({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
this.layer.removeFeatures(this.vertices, {silent: true});
this.layer.removeFeatures(this.virtualVertices, {silent: true});
this.vertices = [];
this.handlers.drag.deactivate();
this.handlers.keyboard.deactivate();
var feature = this.feature;
if (feature && feature.geometry && feature.layer) {
this.unselectFeature(feature);
}
deactivated = true;
}
return deactivated;
},
/**
* Method: beforeSelectFeature
* Called before a feature is selected.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} The feature about to be selected.
*/
beforeSelectFeature: function(feature) {
return this.layer.events.triggerEvent(
"beforefeaturemodified", {feature: feature}
);
},
/**
* APIMethod: selectFeature
* Select a feature for modification in standalone mode. In non-standalone
* mode, this method is called when a feature is selected by clicking.
* Register a listener to the beforefeaturemodified event and return false
* to prevent feature modification.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} the selected feature.
*/
selectFeature: function(feature) {
if (this.feature === feature ||
(this.geometryTypes && OpenLayers.Util.indexOf(this.geometryTypes,
feature.geometry.CLASS_NAME) == -1)) {
return;
}
if (this.beforeSelectFeature(feature) !== false) {
if (this.feature) {
this.unselectFeature(this.feature);
}
this.feature = feature;
this.layer.selectedFeatures.push(feature);
this.layer.drawFeature(feature, 'select');
this.modified = false;
this.resetVertices();
this.onModificationStart(this.feature);
}
// keep track of geometry modifications
var modified = feature.modified;
if (feature.geometry && !(modified && modified.geometry)) {
this._originalGeometry = feature.geometry.clone();
}
},
/**
* APIMethod: unselectFeature
* Called when the select feature control unselects a feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} The unselected feature.
*/
unselectFeature: function(feature) {
this.layer.removeFeatures(this.vertices, {silent: true});
this.vertices = [];
this.layer.destroyFeatures(this.virtualVertices, {silent: true});
this.virtualVertices = [];
if(this.dragHandle) {
this.layer.destroyFeatures([this.dragHandle], {silent: true});
delete this.dragHandle;
}
if(this.radiusHandle) {
this.layer.destroyFeatures([this.radiusHandle], {silent: true});
delete this.radiusHandle;
}
this.layer.drawFeature(this.feature, 'default');
this.feature = null;
OpenLayers.Util.removeItem(this.layer.selectedFeatures, feature);
this.onModificationEnd(feature);
this.layer.events.triggerEvent("afterfeaturemodified", {
feature: feature,
modified: this.modified
});
this.modified = false;
},
/**
* Method: dragStart
* Called by the drag handler before a feature is dragged. This method is
* used to differentiate between points and vertices
* of higher order geometries.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} The point or vertex about to be
* dragged.
*/
dragStart: function(feature) {
var isPoint = feature.geometry.CLASS_NAME ==
'OpenLayers.Geometry.Point';
if (!this.standalone &&
((!feature._sketch && isPoint) || !feature._sketch)) {
if (this.toggle && this.feature === feature) {
// mark feature for unselection
this._unselect = feature;
}
this.selectFeature(feature);
}
if (feature._sketch || isPoint) {
// feature is a drag or virtual handle or point
this.vertex = feature;
this.handlers.drag.stopDown = true;
}
},
/**
* Method: dragVertex
* Called by the drag handler with each drag move of a vertex.
*
* Parameters:
* vertex - {<OpenLayers.Feature.Vector>} The vertex being dragged.
* pixel - {<OpenLayers.Pixel>} Pixel location of the mouse event.
*/
dragVertex: function(vertex, pixel) {
var pos = this.map.getLonLatFromViewPortPx(pixel);
var geom = vertex.geometry;
geom.move(pos.lon - geom.x, pos.lat - geom.y);
this.modified = true;
/**
* Five cases:
* 1) dragging a simple point
* 2) dragging a virtual vertex
* 3) dragging a drag handle
* 4) dragging a real vertex
* 5) dragging a radius handle
*/
if(this.feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
// dragging a simple point
this.layer.events.triggerEvent("vertexmodified", {
vertex: vertex.geometry,
feature: this.feature,
pixel: pixel
});
} else {
if(vertex._index) {
// dragging a virtual vertex
vertex.geometry.parent.addComponent(vertex.geometry,
vertex._index);
// move from virtual to real vertex
delete vertex._index;
OpenLayers.Util.removeItem(this.virtualVertices, vertex);
this.vertices.push(vertex);
} else if(vertex == this.dragHandle) {
// dragging a drag handle
this.layer.removeFeatures(this.vertices, {silent: true});
this.vertices = [];
if(this.radiusHandle) {
this.layer.destroyFeatures([this.radiusHandle], {silent: true});
this.radiusHandle = null;
}
} else if(vertex !== this.radiusHandle) {
// dragging a real vertex
this.layer.events.triggerEvent("vertexmodified", {
vertex: vertex.geometry,
feature: this.feature,
pixel: pixel
});
}
// dragging a radius handle - no special treatment
if(this.virtualVertices.length > 0) {
this.layer.destroyFeatures(this.virtualVertices, {silent: true});
this.virtualVertices = [];
}
this.layer.drawFeature(this.feature, this.standalone ? undefined :
'select');
}
// keep the vertex on top so it gets the mouseout after dragging
// this should be removed in favor of an option to draw under or
// maintain node z-index
this.layer.drawFeature(vertex);
},
/**
* Method: dragComplete
* Called by the drag handler when the feature dragging is complete.
*
* Parameters:
* vertex - {<OpenLayers.Feature.Vector>} The vertex being dragged.
*/
dragComplete: function(vertex) {
this.resetVertices();
this.setFeatureState();
this.onModification(this.feature);
this.layer.events.triggerEvent("featuremodified",
{feature: this.feature});
},
/**
* Method: setFeatureState
* Called when the feature is modified. If the current state is not
* INSERT or DELETE, the state is set to UPDATE.
*/
setFeatureState: function() {
if(this.feature.state != OpenLayers.State.INSERT &&
this.feature.state != OpenLayers.State.DELETE) {
this.feature.state = OpenLayers.State.UPDATE;
if (this.modified && this._originalGeometry) {
var feature = this.feature;
feature.modified = OpenLayers.Util.extend(feature.modified, {
geometry: this._originalGeometry
});
delete this._originalGeometry;
}
}
},
/**
* Method: resetVertices
*/
resetVertices: function() {
if(this.vertices.length > 0) {
this.layer.removeFeatures(this.vertices, {silent: true});
this.vertices = [];
}
if(this.virtualVertices.length > 0) {
this.layer.removeFeatures(this.virtualVertices, {silent: true});
this.virtualVertices = [];
}
if(this.dragHandle) {
this.layer.destroyFeatures([this.dragHandle], {silent: true});
this.dragHandle = null;
}
if(this.radiusHandle) {
this.layer.destroyFeatures([this.radiusHandle], {silent: true});
this.radiusHandle = null;
}
if(this.feature &&
this.feature.geometry.CLASS_NAME != "OpenLayers.Geometry.Point") {
if((this.mode & OpenLayers.Control.ModifyFeature.DRAG)) {
this.collectDragHandle();
}
if((this.mode & (OpenLayers.Control.ModifyFeature.ROTATE |
OpenLayers.Control.ModifyFeature.RESIZE))) {
this.collectRadiusHandle();
}
if(this.mode & OpenLayers.Control.ModifyFeature.RESHAPE){
// Don't collect vertices when we're resizing
if (!(this.mode & OpenLayers.Control.ModifyFeature.RESIZE)){
this.collectVertices();
}
}
}
},
/**
* Method: handleKeypress
* Called by the feature handler on keypress. This is used to delete
* vertices. If the <deleteCode> property is set, vertices will
* be deleted when a feature is selected for modification and
* the mouse is over a vertex.
*
* Parameters:
* evt - {Event} Keypress event.
*/
handleKeypress: function(evt) {
var code = evt.keyCode;
// check for delete key
if(this.feature &&
OpenLayers.Util.indexOf(this.deleteCodes, code) != -1) {
var vertex = this.layer.getFeatureFromEvent(this.handlers.drag.evt);
if (vertex &&
OpenLayers.Util.indexOf(this.vertices, vertex) != -1 &&
!this.handlers.drag.dragging && vertex.geometry.parent) {
// remove the vertex
vertex.geometry.parent.removeComponent(vertex.geometry);
this.layer.events.triggerEvent("vertexremoved", {
vertex: vertex.geometry,
feature: this.feature,
pixel: evt.xy
});
this.layer.drawFeature(this.feature, this.standalone ?
undefined : 'select');
this.modified = true;
this.resetVertices();
this.setFeatureState();
this.onModification(this.feature);
this.layer.events.triggerEvent("featuremodified",
{feature: this.feature});
}
}
},
/**
* Method: collectVertices
* Collect the vertices from the modifiable feature's geometry and push
* them on to the control's vertices array.
*/
collectVertices: function() {
this.vertices = [];
this.virtualVertices = [];
var control = this;
function collectComponentVertices(geometry) {
var i, vertex, component, len;
if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
vertex = new OpenLayers.Feature.Vector(geometry);
vertex._sketch = true;
vertex.renderIntent = control.vertexRenderIntent;
control.vertices.push(vertex);
} else {
var numVert = geometry.components.length;
if(geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
numVert -= 1;
}
for(i=0; i<numVert; ++i) {
component = geometry.components[i];
if(component.CLASS_NAME == "OpenLayers.Geometry.Point") {
vertex = new OpenLayers.Feature.Vector(component);
vertex._sketch = true;
vertex.renderIntent = control.vertexRenderIntent;
control.vertices.push(vertex);
} else {
collectComponentVertices(component);
}
}
// add virtual vertices in the middle of each edge
if (control.createVertices && geometry.CLASS_NAME != "OpenLayers.Geometry.MultiPoint") {
for(i=0, len=geometry.components.length; i<len-1; ++i) {
var prevVertex = geometry.components[i];
var nextVertex = geometry.components[i + 1];
if(prevVertex.CLASS_NAME == "OpenLayers.Geometry.Point" &&
nextVertex.CLASS_NAME == "OpenLayers.Geometry.Point") {
var x = (prevVertex.x + nextVertex.x) / 2;
var y = (prevVertex.y + nextVertex.y) / 2;
var point = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point(x, y),
null, control.virtualStyle
);
// set the virtual parent and intended index
point.geometry.parent = geometry;
point._index = i + 1;
point._sketch = true;
control.virtualVertices.push(point);
}
}
}
}
}
collectComponentVertices.call(this, this.feature.geometry);
this.layer.addFeatures(this.virtualVertices, {silent: true});
this.layer.addFeatures(this.vertices, {silent: true});
},
/**
* Method: collectDragHandle
* Collect the drag handle for the selected geometry.
*/
collectDragHandle: function() {
var geometry = this.feature.geometry;
var center = geometry.getBounds().getCenterLonLat();
var originGeometry = new OpenLayers.Geometry.Point(
center.lon, center.lat
);
var origin = new OpenLayers.Feature.Vector(originGeometry);
originGeometry.move = function(x, y) {
OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
geometry.move(x, y);
};
origin._sketch = true;
this.dragHandle = origin;
this.dragHandle.renderIntent = this.vertexRenderIntent;
this.layer.addFeatures([this.dragHandle], {silent: true});
},
/**
* Method: collectRadiusHandle
* Collect the radius handle for the selected geometry.
*/
collectRadiusHandle: function() {
var geometry = this.feature.geometry;
var bounds = geometry.getBounds();
var center = bounds.getCenterLonLat();
var originGeometry = new OpenLayers.Geometry.Point(
center.lon, center.lat
);
var radiusGeometry = new OpenLayers.Geometry.Point(
bounds.right, bounds.bottom
);
var radius = new OpenLayers.Feature.Vector(radiusGeometry);
var resize = (this.mode & OpenLayers.Control.ModifyFeature.RESIZE);
var reshape = (this.mode & OpenLayers.Control.ModifyFeature.RESHAPE);
var rotate = (this.mode & OpenLayers.Control.ModifyFeature.ROTATE);
radiusGeometry.move = function(x, y) {
OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
var dx1 = this.x - originGeometry.x;
var dy1 = this.y - originGeometry.y;
var dx0 = dx1 - x;
var dy0 = dy1 - y;
if(rotate) {
var a0 = Math.atan2(dy0, dx0);
var a1 = Math.atan2(dy1, dx1);
var angle = a1 - a0;
angle *= 180 / Math.PI;
geometry.rotate(angle, originGeometry);
}
if(resize) {
var scale, ratio;
// 'resize' together with 'reshape' implies that the aspect
// ratio of the geometry will not be preserved whilst resizing
if (reshape) {
scale = dy1 / dy0;
ratio = (dx1 / dx0) / scale;
} else {
var l0 = Math.sqrt((dx0 * dx0) + (dy0 * dy0));
var l1 = Math.sqrt((dx1 * dx1) + (dy1 * dy1));
scale = l1 / l0;
}
geometry.resize(scale, originGeometry, ratio);
}
};
radius._sketch = true;
this.radiusHandle = radius;
this.radiusHandle.renderIntent = this.vertexRenderIntent;
this.layer.addFeatures([this.radiusHandle], {silent: true});
},
/**
* Method: setMap
* Set the map property for the control and all handlers.
*
* Parameters:
* map - {<OpenLayers.Map>} The control's map.
*/
setMap: function(map) {
this.handlers.drag.setMap(map);
OpenLayers.Control.prototype.setMap.apply(this, arguments);
},
/**
* Method: handleMapEvents
*
* Parameters:
* evt - {Object}
*/
handleMapEvents: function(evt) {
if (evt.type == "removelayer" || evt.property == "order") {
this.moveLayerToTop();
}
},
/**
* Method: moveLayerToTop
* Moves the layer for this handler to the top, so mouse events can reach
* it.
*/
moveLayerToTop: function() {
var index = Math.max(this.map.Z_INDEX_BASE['Feature'] - 1,
this.layer.getZIndex()) + 1;
this.layer.setZIndex(index);
},
/**
* Method: moveLayerBack
* Moves the layer back to the position determined by the map's layers
* array.
*/
moveLayerBack: function() {
var index = this.layer.getZIndex() - 1;
if (index >= this.map.Z_INDEX_BASE['Feature']) {
this.layer.setZIndex(index);
} else {
this.map.setLayerZIndex(this.layer,
this.map.getLayerIndex(this.layer));
}
},
CLASS_NAME: "OpenLayers.Control.ModifyFeature"
});
/**
* Constant: RESHAPE
* {Integer} Constant used to make the control work in reshape mode
*/
OpenLayers.Control.ModifyFeature.RESHAPE = 1;
/**
* Constant: RESIZE
* {Integer} Constant used to make the control work in resize mode
*/
OpenLayers.Control.ModifyFeature.RESIZE = 2;
/**
* Constant: ROTATE
* {Integer} Constant used to make the control work in rotate mode
*/
OpenLayers.Control.ModifyFeature.ROTATE = 4;
/**
* Constant: DRAG
* {Integer} Constant used to make the control work in drag mode
*/
OpenLayers.Control.ModifyFeature.DRAG = 8;
/* ======================================================================
OpenLayers/Layer/Bing.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/XYZ.js
*/
/**
* Class: OpenLayers.Layer.Bing
* Bing layer using direct tile access as provided by Bing Maps REST Services.
* See http://msdn.microsoft.com/en-us/library/ff701713.aspx for more
* information. Note: Terms of Service compliant use requires the map to be
* configured with an <OpenLayers.Control.Attribution> control and the
* attribution placed on or near the map.
*
* Inherits from:
* - <OpenLayers.Layer.XYZ>
*/
OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {
/**
* Property: key
* {String} API key for Bing maps, get your own key
* at http://bingmapsportal.com/ .
*/
key: null,
/**
* Property: serverResolutions
* {Array} the resolutions provided by the Bing servers.
*/
serverResolutions: [
156543.03390625, 78271.516953125, 39135.7584765625,
19567.87923828125, 9783.939619140625, 4891.9698095703125,
2445.9849047851562, 1222.9924523925781, 611.4962261962891,
305.74811309814453, 152.87405654907226, 76.43702827453613,
38.218514137268066, 19.109257068634033, 9.554628534317017,
4.777314267158508, 2.388657133579254, 1.194328566789627,
0.5971642833948135, 0.29858214169740677, 0.14929107084870338,
0.07464553542435169
],
/**
* Property: attributionTemplate
* {String}
*/
attributionTemplate: '<span class="olBingAttribution ${type}">' +
'<div><a target="_blank" href="http://www.bing.com/maps/">' +
'<img src="${logo}" /></a></div>${copyrights}' +
'<a style="white-space: nowrap" target="_blank" '+
'href="http://www.microsoft.com/maps/product/terms.html">' +
'Terms of Use</a></span>',
/**
* Property: metadata
* {Object} Metadata for this layer, as returned by the callback script
*/
metadata: null,
/**
* Property: protocolRegex
* {RegExp} Regular expression to match and replace http: in bing urls
*/
protocolRegex: /^http:/i,
/**
* APIProperty: type
* {String} The layer identifier. Any non-birdseye imageryType
* from http://msdn.microsoft.com/en-us/library/ff701716.aspx can be
* used. Default is "Road".
*/
type: "Road",
/**
* APIProperty: culture
* {String} The culture identifier. See http://msdn.microsoft.com/en-us/library/ff701709.aspx
* for the definition and the possible values. Default is "en-US".
*/
culture: "en-US",
/**
* APIProperty: metadataParams
* {Object} Optional url parameters for the Get Imagery Metadata request
* as described here: http://msdn.microsoft.com/en-us/library/ff701716.aspx
*/
metadataParams: null,
/** APIProperty: tileOptions
* {Object} optional configuration options for <OpenLayers.Tile> instances
* created by this Layer. Default is
*
* (code)
* {crossOriginKeyword: 'anonymous'}
* (end)
*/
tileOptions: null,
/** APIProperty: protocol
* {String} Protocol to use to fetch Imagery Metadata, tiles and bing logo
* Can be 'http:' 'https:' or ''
*
* Warning: tiles may not be available under both HTTP and HTTPS protocols.
* Microsoft approved use of both HTTP and HTTPS urls for tiles. However
* this is undocumented and the Imagery Metadata API always returns HTTP
* urls.
*
* Default is '', unless when executed from a file:/// uri, in which case
* it is 'http:'.
*/
protocol: ~window.location.href.indexOf('http') ? '' : 'http:',
/**
* Constructor: OpenLayers.Layer.Bing
* Create a new Bing layer.
*
* Example:
* (code)
* var road = new OpenLayers.Layer.Bing({
* name: "My Bing Aerial Layer",
* type: "Aerial",
* key: "my-api-key-here",
* });
* (end)
*
* Parameters:
* options - {Object} Configuration properties for the layer.
*
* Required configuration properties:
* key - {String} Bing Maps API key for your application. Get one at
* http://bingmapsportal.com/.
* type - {String} The layer identifier. Any non-birdseye imageryType
* from http://msdn.microsoft.com/en-us/library/ff701716.aspx can be
* used.
*
* Any other documented layer properties can be provided in the config object.
*/
initialize: function(options) {
options = OpenLayers.Util.applyDefaults({
sphericalMercator: true
}, options);
var name = options.name || "Bing " + (options.type || this.type);
var newArgs = [name, null, options];
OpenLayers.Layer.XYZ.prototype.initialize.apply(this, newArgs);
this.tileOptions = OpenLayers.Util.extend({
crossOriginKeyword: 'anonymous'
}, this.options.tileOptions);
this.loadMetadata();
},
/**
* Method: loadMetadata
*/
loadMetadata: function() {
this._callbackId = "_callback_" + this.id.replace(/\./g, "_");
// link the processMetadata method to the global scope and bind it
// to this instance
window[this._callbackId] = OpenLayers.Function.bind(
OpenLayers.Layer.Bing.processMetadata, this
);
var params = OpenLayers.Util.applyDefaults({
key: this.key,
jsonp: this._callbackId,
include: "ImageryProviders"
}, this.metadataParams);
var url = this.protocol + "//dev.virtualearth.net/REST/v1/Imagery/Metadata/" +
this.type + "?" + OpenLayers.Util.getParameterString(params);
var script = document.createElement("script");
script.type = "text/javascript";
script.src = url;
script.id = this._callbackId;
document.getElementsByTagName("head")[0].appendChild(script);
},
/**
* Method: initLayer
*
* Sets layer properties according to the metadata provided by the API
*/
initLayer: function() {
var res = this.metadata.resourceSets[0].resources[0];
var url = res.imageUrl.replace("{quadkey}", "${quadkey}");
url = url.replace("{culture}", this.culture);
url = url.replace(this.protocolRegex, this.protocol);
this.url = [];
for (var i=0; i<res.imageUrlSubdomains.length; ++i) {
this.url.push(url.replace("{subdomain}", res.imageUrlSubdomains[i]));
}
this.addOptions({
maxResolution: Math.min(
this.serverResolutions[res.zoomMin],
this.maxResolution || Number.POSITIVE_INFINITY
),
numZoomLevels: Math.min(
res.zoomMax + 1 - res.zoomMin, this.numZoomLevels
)
}, true);
if (!this.isBaseLayer) {
this.redraw();
}
this.updateAttribution();
},
/**
* Method: getURL
*
* Paramters:
* bounds - {<OpenLayers.Bounds>}
*/
getURL: function(bounds) {
if (!this.url) {
return;
}
var xyz = this.getXYZ(bounds), x = xyz.x, y = xyz.y, z = xyz.z;
var quadDigits = [];
for (var i = z; i > 0; --i) {
var digit = '0';
var mask = 1 << (i - 1);
if ((x & mask) != 0) {
digit++;
}
if ((y & mask) != 0) {
digit++;
digit++;
}
quadDigits.push(digit);
}
var quadKey = quadDigits.join("");
var url = this.selectUrl('' + x + y + z, this.url);
return OpenLayers.String.format(url, {'quadkey': quadKey});
},
/**
* Method: updateAttribution
* Updates the attribution according to the requirements outlined in
* http://gis.638310.n2.nabble.com/Bing-imagery-td5789168.html
*/
updateAttribution: function() {
var metadata = this.metadata;
if (!metadata.resourceSets || !this.map || !this.map.center) {
return;
}
var res = metadata.resourceSets[0].resources[0];
var extent = this.map.getExtent().transform(
this.map.getProjectionObject(),
new OpenLayers.Projection("EPSG:4326")
);
var providers = res.imageryProviders || [],
zoom = OpenLayers.Util.indexOf(this.serverResolutions,
this.getServerResolution()),
copyrights = "", provider, i, ii, j, jj, bbox, coverage;
for (i=0,ii=providers.length; i<ii; ++i) {
provider = providers[i];
for (j=0,jj=provider.coverageAreas.length; j<jj; ++j) {
coverage = provider.coverageAreas[j];
// axis order provided is Y,X
bbox = OpenLayers.Bounds.fromArray(coverage.bbox, true);
if (extent.intersectsBounds(bbox) &&
zoom <= coverage.zoomMax && zoom >= coverage.zoomMin) {
copyrights += provider.attribution + " ";
}
}
}
var logo = metadata.brandLogoUri.replace(this.protocolRegex, this.protocol);
this.attribution = OpenLayers.String.format(this.attributionTemplate, {
type: this.type.toLowerCase(),
logo: logo,
copyrights: copyrights
});
this.map && this.map.events.triggerEvent("changelayer", {
layer: this,
property: "attribution"
});
},
/**
* Method: setMap
*/
setMap: function() {
OpenLayers.Layer.XYZ.prototype.setMap.apply(this, arguments);
this.map.events.register("moveend", this, this.updateAttribution);
},
/**
* APIMethod: clone
*
* Parameters:
* obj - {Object}
*
* Returns:
* {<OpenLayers.Layer.Bing>} An exact clone of this <OpenLayers.Layer.Bing>
*/
clone: function(obj) {
if (obj == null) {
obj = new OpenLayers.Layer.Bing(this.options);
}
//get all additions from superclasses
obj = OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
return obj;
},
/**
* Method: destroy
*/
destroy: function() {
this.map &&
this.map.events.unregister("moveend", this, this.updateAttribution);
OpenLayers.Layer.XYZ.prototype.destroy.apply(this, arguments);
},
CLASS_NAME: "OpenLayers.Layer.Bing"
});
/**
* Function: OpenLayers.Layer.Bing.processMetadata
* This function will be bound to an instance, linked to the global scope with
* an id, and called by the JSONP script returned by the API.
*
* Parameters:
* metadata - {Object} metadata as returned by the API
*/
OpenLayers.Layer.Bing.processMetadata = function(metadata) {
this.metadata = metadata;
this.initLayer();
var script = document.getElementById(this._callbackId);
script.parentNode.removeChild(script);
window[this._callbackId] = undefined; // cannot delete from window in IE
delete this._callbackId;
};
/* ======================================================================
OpenLayers/Geometry/MultiLineString.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/Collection.js
* @requires OpenLayers/Geometry/LineString.js
*/
/**
* Class: OpenLayers.Geometry.MultiLineString
* A MultiLineString is a geometry with multiple <OpenLayers.Geometry.LineString>
* components.
*
* Inherits from:
* - <OpenLayers.Geometry.Collection>
* - <OpenLayers.Geometry>
*/
OpenLayers.Geometry.MultiLineString = OpenLayers.Class(
OpenLayers.Geometry.Collection, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null value means the
* component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.LineString"],
/**
* Constructor: OpenLayers.Geometry.MultiLineString
* Constructor for a MultiLineString Geometry.
*
* Parameters:
* components - {Array(<OpenLayers.Geometry.LineString>)}
*
*/
/**
* Method: split
* Use this geometry (the source) to attempt to split a target geometry.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Properties of this object will be used to determine
* how the split is conducted.
*
* Valid options:
* mutual - {Boolean} Split the source geometry in addition to the target
* geometry. Default is false.
* edge - {Boolean} Allow splitting when only edges intersect. Default is
* true. If false, a vertex on the source must be within the tolerance
* distance of the intersection to be considered a split.
* tolerance - {Number} If a non-null value is provided, intersections
* within the tolerance distance of an existing vertex on the source
* will be assumed to occur at the vertex.
*
* Returns:
* {Array} A list of geometries (of this same type as the target) that
* result from splitting the target with the source geometry. The
* source and target geometry will remain unmodified. If no split
* results, null will be returned. If mutual is true and a split
* results, return will be an array of two arrays - the first will be
* all geometries that result from splitting the source geometry and
* the second will be all geometries that result from splitting the
* target geometry.
*/
split: function(geometry, options) {
var results = null;
var mutual = options && options.mutual;
var splits, sourceLine, sourceLines, sourceSplit, targetSplit;
var sourceParts = [];
var targetParts = [geometry];
for(var i=0, len=this.components.length; i<len; ++i) {
sourceLine = this.components[i];
sourceSplit = false;
for(var j=0; j < targetParts.length; ++j) {
splits = sourceLine.split(targetParts[j], options);
if(splits) {
if(mutual) {
sourceLines = splits[0];
for(var k=0, klen=sourceLines.length; k<klen; ++k) {
if(k===0 && sourceParts.length) {
sourceParts[sourceParts.length-1].addComponent(
sourceLines[k]
);
} else {
sourceParts.push(
new OpenLayers.Geometry.MultiLineString([
sourceLines[k]
])
);
}
}
sourceSplit = true;
splits = splits[1];
}
if(splits.length) {
// splice in new target parts
splits.unshift(j, 1);
Array.prototype.splice.apply(targetParts, splits);
break;
}
}
}
if(!sourceSplit) {
// source line was not hit
if(sourceParts.length) {
// add line to existing multi
sourceParts[sourceParts.length-1].addComponent(
sourceLine.clone()
);
} else {
// create a fresh multi
sourceParts = [
new OpenLayers.Geometry.MultiLineString(
sourceLine.clone()
)
];
}
}
}
if(sourceParts && sourceParts.length > 1) {
sourceSplit = true;
} else {
sourceParts = [];
}
if(targetParts && targetParts.length > 1) {
targetSplit = true;
} else {
targetParts = [];
}
if(sourceSplit || targetSplit) {
if(mutual) {
results = [sourceParts, targetParts];
} else {
results = targetParts;
}
}
return results;
},
/**
* Method: splitWith
* Split this geometry (the target) with the given geometry (the source).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} A geometry used to split this
* geometry (the source).
* options - {Object} Properties of this object will be used to determine
* how the split is conducted.
*
* Valid options:
* mutual - {Boolean} Split the source geometry in addition to the target
* geometry. Default is false.
* edge - {Boolean} Allow splitting when only edges intersect. Default is
* true. If false, a vertex on the source must be within the tolerance
* distance of the intersection to be considered a split.
* tolerance - {Number} If a non-null value is provided, intersections
* within the tolerance distance of an existing vertex on the source
* will be assumed to occur at the vertex.
*
* Returns:
* {Array} A list of geometries (of this same type as the target) that
* result from splitting the target with the source geometry. The
* source and target geometry will remain unmodified. If no split
* results, null will be returned. If mutual is true and a split
* results, return will be an array of two arrays - the first will be
* all geometries that result from splitting the source geometry and
* the second will be all geometries that result from splitting the
* target geometry.
*/
splitWith: function(geometry, options) {
var results = null;
var mutual = options && options.mutual;
var splits, targetLine, sourceLines, sourceSplit, targetSplit, sourceParts, targetParts;
if(geometry instanceof OpenLayers.Geometry.LineString) {
targetParts = [];
sourceParts = [geometry];
for(var i=0, len=this.components.length; i<len; ++i) {
targetSplit = false;
targetLine = this.components[i];
for(var j=0; j<sourceParts.length; ++j) {
splits = sourceParts[j].split(targetLine, options);
if(splits) {
if(mutual) {
sourceLines = splits[0];
if(sourceLines.length) {
// splice in new source parts
sourceLines.unshift(j, 1);
Array.prototype.splice.apply(sourceParts, sourceLines);
j += sourceLines.length - 2;
}
splits = splits[1];
if(splits.length === 0) {
splits = [targetLine.clone()];
}
}
for(var k=0, klen=splits.length; k<klen; ++k) {
if(k===0 && targetParts.length) {
targetParts[targetParts.length-1].addComponent(
splits[k]
);
} else {
targetParts.push(
new OpenLayers.Geometry.MultiLineString([
splits[k]
])
);
}
}
targetSplit = true;
}
}
if(!targetSplit) {
// target component was not hit
if(targetParts.length) {
// add it to any existing multi-line
targetParts[targetParts.length-1].addComponent(
targetLine.clone()
);
} else {
// or start with a fresh multi-line
targetParts = [
new OpenLayers.Geometry.MultiLineString([
targetLine.clone()
])
];
}
}
}
} else {
results = geometry.split(this);
}
if(sourceParts && sourceParts.length > 1) {
sourceSplit = true;
} else {
sourceParts = [];
}
if(targetParts && targetParts.length > 1) {
targetSplit = true;
} else {
targetParts = [];
}
if(sourceSplit || targetSplit) {
if(mutual) {
results = [sourceParts, targetParts];
} else {
results = targetParts;
}
}
return results;
},
CLASS_NAME: "OpenLayers.Geometry.MultiLineString"
});
/* ======================================================================
OpenLayers/Format.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
*/
/**
* Class: OpenLayers.Format
* Base class for format reading/writing a variety of formats. Subclasses
* of OpenLayers.Format are expected to have read and write methods.
*/
OpenLayers.Format = OpenLayers.Class({
/**
* Property: options
* {Object} A reference to options passed to the constructor.
*/
options: null,
/**
* APIProperty: externalProjection
* {<OpenLayers.Projection>} When passed a externalProjection and
* internalProjection, the format will reproject the geometries it
* reads or writes. The externalProjection is the projection used by
* the content which is passed into read or which comes out of write.
* In order to reproject, a projection transformation function for the
* specified projections must be available. This support may be
* provided via proj4js or via a custom transformation function. See
* {<OpenLayers.Projection.addTransform>} for more information on
* custom transformations.
*/
externalProjection: null,
/**
* APIProperty: internalProjection
* {<OpenLayers.Projection>} When passed a externalProjection and
* internalProjection, the format will reproject the geometries it
* reads or writes. The internalProjection is the projection used by
* the geometries which are returned by read or which are passed into
* write. In order to reproject, a projection transformation function
* for the specified projections must be available. This support may be
* provided via proj4js or via a custom transformation function. See
* {<OpenLayers.Projection.addTransform>} for more information on
* custom transformations.
*/
internalProjection: null,
/**
* APIProperty: data
* {Object} When <keepData> is true, this is the parsed string sent to
* <read>.
*/
data: null,
/**
* APIProperty: keepData
* {Object} Maintain a reference (<data>) to the most recently read data.
* Default is false.
*/
keepData: false,
/**
* Constructor: OpenLayers.Format
* Instances of this class are not useful. See one of the subclasses.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* format
*
* Valid options:
* keepData - {Boolean} If true, upon <read>, the data property will be
* set to the parsed object (e.g. the json or xml object).
*
* Returns:
* An instance of OpenLayers.Format
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
this.options = options;
},
/**
* APIMethod: destroy
* Clean up.
*/
destroy: function() {
},
/**
* Method: read
* Read data from a string, and return an object whose type depends on the
* subclass.
*
* Parameters:
* data - {string} Data to read/parse.
*
* Returns:
* Depends on the subclass
*/
read: function(data) {
throw new Error('Read not implemented.');
},
/**
* Method: write
* Accept an object, and return a string.
*
* Parameters:
* object - {Object} Object to be serialized
*
* Returns:
* {String} A string representation of the object.
*/
write: function(object) {
throw new Error('Write not implemented.');
},
CLASS_NAME: "OpenLayers.Format"
});
/* ======================================================================
OpenLayers/Format/XML.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format.js
*/
/**
* Class: OpenLayers.Format.XML
* Read and write XML. For cross-browser XML generation, use methods on an
* instance of the XML format class instead of on <code>document<end>.
* The DOM creation and traversing methods exposed here all mimic the
* W3C XML DOM methods. Create a new parser with the
* <OpenLayers.Format.XML> constructor.
*
* Inherits from:
* - <OpenLayers.Format>
*/
OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs. Properties
* of this object should not be set individually. Read-only. All
* XML subclasses should have their own namespaces object. Use
* <setNamespace> to add or set a namespace alias after construction.
*/
namespaces: null,
/**
* Property: namespaceAlias
* {Object} Mapping of namespace URI to namespace alias. This object
* is read-only. Use <setNamespace> to add or set a namespace alias.
*/
namespaceAlias: null,
/**
* Property: defaultPrefix
* {String} The default namespace alias for creating element nodes.
*/
defaultPrefix: null,
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {},
/**
* Property: writers
* As a compliment to the <readers> property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {},
/**
* Property: xmldom
* {XMLDom} If this browser uses ActiveX, this will be set to a XMLDOM
* object. It is not intended to be a browser sniffing property.
* Instead, the xmldom property is used instead of <code>document<end>
* where namespaced node creation methods are not supported. In all
* other browsers, this remains null.
*/
xmldom: null,
/**
* Constructor: OpenLayers.Format.XML
* Construct an XML parser. The parser is used to read and write XML.
* Reading XML from a string returns a DOM element. Writing XML from
* a DOM element returns a string.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on
* the object.
*/
initialize: function(options) {
if(window.ActiveXObject) {
this.xmldom = new ActiveXObject("Microsoft.XMLDOM");
}
OpenLayers.Format.prototype.initialize.apply(this, [options]);
// clone the namespace object and set all namespace aliases
this.namespaces = OpenLayers.Util.extend({}, this.namespaces);
this.namespaceAlias = {};
for(var alias in this.namespaces) {
this.namespaceAlias[this.namespaces[alias]] = alias;
}
},
/**
* APIMethod: destroy
* Clean up.
*/
destroy: function() {
this.xmldom = null;
OpenLayers.Format.prototype.destroy.apply(this, arguments);
},
/**
* Method: setNamespace
* Set a namespace alias and URI for the format.
*
* Parameters:
* alias - {String} The namespace alias (prefix).
* uri - {String} The namespace URI.
*/
setNamespace: function(alias, uri) {
this.namespaces[alias] = uri;
this.namespaceAlias[uri] = alias;
},
/**
* APIMethod: read
* Deserialize a XML string and return a DOM node.
*
* Parameters:
* text - {String} A XML string
* Returns:
* {DOMElement} A DOM node
*/
read: function(text) {
var index = text.indexOf('<');
if(index > 0) {
text = text.substring(index);
}
var node = OpenLayers.Util.Try(
OpenLayers.Function.bind((
function() {
var xmldom;
/**
* Since we want to be able to call this method on the prototype
* itself, this.xmldom may not exist even if in IE.
*/
if(window.ActiveXObject && !this.xmldom) {
xmldom = new ActiveXObject("Microsoft.XMLDOM");
} else {
xmldom = this.xmldom;
}
xmldom.loadXML(text);
return xmldom;
}
), this),
function() {
return new DOMParser().parseFromString(text, 'text/xml');
},
function() {
var req = new XMLHttpRequest();
req.open("GET", "data:" + "text/xml" +
";charset=utf-8," + encodeURIComponent(text), false);
if(req.overrideMimeType) {
req.overrideMimeType("text/xml");
}
req.send(null);
return req.responseXML;
}
);
if(this.keepData) {
this.data = node;
}
return node;
},
/**
* APIMethod: write
* Serialize a DOM node into a XML string.
*
* Parameters:
* node - {DOMElement} A DOM node.
*
* Returns:
* {String} The XML string representation of the input node.
*/
write: function(node) {
var data;
if(this.xmldom) {
data = node.xml;
} else {
var serializer = new XMLSerializer();
if (node.nodeType == 1) {
// Add nodes to a document before serializing. Everything else
// is serialized as is. This may need more work. See #1218 .
var doc = document.implementation.createDocument("", "", null);
if (doc.importNode) {
node = doc.importNode(node, true);
}
doc.appendChild(node);
data = serializer.serializeToString(doc);
} else {
data = serializer.serializeToString(node);
}
}
return data;
},
/**
* APIMethod: createElementNS
* Create a new element with namespace. This node can be appended to
* another node with the standard node.appendChild method. For
* cross-browser support, this method must be used instead of
* document.createElementNS.
*
* Parameters:
* uri - {String} Namespace URI for the element.
* name - {String} The qualified name of the element (prefix:localname).
*
* Returns:
* {Element} A DOM element with namespace.
*/
createElementNS: function(uri, name) {
var element;
if(this.xmldom) {
if(typeof uri == "string") {
element = this.xmldom.createNode(1, name, uri);
} else {
element = this.xmldom.createNode(1, name, "");
}
} else {
element = document.createElementNS(uri, name);
}
return element;
},
/**
* APIMethod: createDocumentFragment
* Create a document fragment node that can be appended to another node
* created by createElementNS. This will call
* document.createDocumentFragment outside of IE. In IE, the ActiveX
* object's createDocumentFragment method is used.
*
* Returns:
* {Element} A document fragment.
*/
createDocumentFragment: function() {
var element;
if (this.xmldom) {
element = this.xmldom.createDocumentFragment();
} else {
element = document.createDocumentFragment();
}
return element;
},
/**
* APIMethod: createTextNode
* Create a text node. This node can be appended to another node with
* the standard node.appendChild method. For cross-browser support,
* this method must be used instead of document.createTextNode.
*
* Parameters:
* text - {String} The text of the node.
*
* Returns:
* {DOMElement} A DOM text node.
*/
createTextNode: function(text) {
var node;
if (typeof text !== "string") {
text = String(text);
}
if(this.xmldom) {
node = this.xmldom.createTextNode(text);
} else {
node = document.createTextNode(text);
}
return node;
},
/**
* APIMethod: getElementsByTagNameNS
* Get a list of elements on a node given the namespace URI and local name.
* To return all nodes in a given namespace, use '*' for the name
* argument. To return all nodes of a given (local) name, regardless
* of namespace, use '*' for the uri argument.
*
* Parameters:
* node - {Element} Node on which to search for other nodes.
* uri - {String} Namespace URI.
* name - {String} Local name of the tag (without the prefix).
*
* Returns:
* {NodeList} A node list or array of elements.
*/
getElementsByTagNameNS: function(node, uri, name) {
var elements = [];
if(node.getElementsByTagNameNS) {
elements = node.getElementsByTagNameNS(uri, name);
} else {
// brute force method
var allNodes = node.getElementsByTagName("*");
var potentialNode, fullName;
for(var i=0, len=allNodes.length; i<len; ++i) {
potentialNode = allNodes[i];
fullName = (potentialNode.prefix) ?
(potentialNode.prefix + ":" + name) : name;
if((name == "*") || (fullName == potentialNode.nodeName)) {
if((uri == "*") || (uri == potentialNode.namespaceURI)) {
elements.push(potentialNode);
}
}
}
}
return elements;
},
/**
* APIMethod: getAttributeNodeNS
* Get an attribute node given the namespace URI and local name.
*
* Parameters:
* node - {Element} Node on which to search for attribute nodes.
* uri - {String} Namespace URI.
* name - {String} Local name of the attribute (without the prefix).
*
* Returns:
* {DOMElement} An attribute node or null if none found.
*/
getAttributeNodeNS: function(node, uri, name) {
var attributeNode = null;
if(node.getAttributeNodeNS) {
attributeNode = node.getAttributeNodeNS(uri, name);
} else {
var attributes = node.attributes;
var potentialNode, fullName;
for(var i=0, len=attributes.length; i<len; ++i) {
potentialNode = attributes[i];
if(potentialNode.namespaceURI == uri) {
fullName = (potentialNode.prefix) ?
(potentialNode.prefix + ":" + name) : name;
if(fullName == potentialNode.nodeName) {
attributeNode = potentialNode;
break;
}
}
}
}
return attributeNode;
},
/**
* APIMethod: getAttributeNS
* Get an attribute value given the namespace URI and local name.
*
* Parameters:
* node - {Element} Node on which to search for an attribute.
* uri - {String} Namespace URI.
* name - {String} Local name of the attribute (without the prefix).
*
* Returns:
* {String} An attribute value or and empty string if none found.
*/
getAttributeNS: function(node, uri, name) {
var attributeValue = "";
if(node.getAttributeNS) {
attributeValue = node.getAttributeNS(uri, name) || "";
} else {
var attributeNode = this.getAttributeNodeNS(node, uri, name);
if(attributeNode) {
attributeValue = attributeNode.nodeValue;
}
}
return attributeValue;
},
/**
* APIMethod: getChildValue
* Get the textual value of the node if it exists, or return an
* optional default string. Returns an empty string if no first child
* exists and no default value is supplied.
*
* Parameters:
* node - {DOMElement} The element used to look for a first child value.
* def - {String} Optional string to return in the event that no
* first child value exists.
*
* Returns:
* {String} The value of the first child of the given node.
*/
getChildValue: function(node, def) {
var value = def || "";
if(node) {
for(var child=node.firstChild; child; child=child.nextSibling) {
switch(child.nodeType) {
case 3: // text node
case 4: // cdata section
value += child.nodeValue;
}
}
}
return value;
},
/**
* APIMethod: isSimpleContent
* Test if the given node has only simple content (i.e. no child element
* nodes).
*
* Parameters:
* node - {DOMElement} An element node.
*
* Returns:
* {Boolean} The node has no child element nodes (nodes of type 1).
*/
isSimpleContent: function(node) {
var simple = true;
for(var child=node.firstChild; child; child=child.nextSibling) {
if(child.nodeType === 1) {
simple = false;
break;
}
}
return simple;
},
/**
* APIMethod: contentType
* Determine the content type for a given node.
*
* Parameters:
* node - {DOMElement}
*
* Returns:
* {Integer} One of OpenLayers.Format.XML.CONTENT_TYPE.{EMPTY,SIMPLE,COMPLEX,MIXED}
* if the node has no, simple, complex, or mixed content.
*/
contentType: function(node) {
var simple = false,
complex = false;
var type = OpenLayers.Format.XML.CONTENT_TYPE.EMPTY;
for(var child=node.firstChild; child; child=child.nextSibling) {
switch(child.nodeType) {
case 1: // element
complex = true;
break;
case 8: // comment
break;
default:
simple = true;
}
if(complex && simple) {
break;
}
}
if(complex && simple) {
type = OpenLayers.Format.XML.CONTENT_TYPE.MIXED;
} else if(complex) {
return OpenLayers.Format.XML.CONTENT_TYPE.COMPLEX;
} else if(simple) {
return OpenLayers.Format.XML.CONTENT_TYPE.SIMPLE;
}
return type;
},
/**
* APIMethod: hasAttributeNS
* Determine whether a node has a particular attribute matching the given
* name and namespace.
*
* Parameters:
* node - {Element} Node on which to search for an attribute.
* uri - {String} Namespace URI.
* name - {String} Local name of the attribute (without the prefix).
*
* Returns:
* {Boolean} The node has an attribute matching the name and namespace.
*/
hasAttributeNS: function(node, uri, name) {
var found = false;
if(node.hasAttributeNS) {
found = node.hasAttributeNS(uri, name);
} else {
found = !!this.getAttributeNodeNS(node, uri, name);
}
return found;
},
/**
* APIMethod: setAttributeNS
* Adds a new attribute or changes the value of an attribute with the given
* namespace and name.
*
* Parameters:
* node - {Element} Element node on which to set the attribute.
* uri - {String} Namespace URI for the attribute.
* name - {String} Qualified name (prefix:localname) for the attribute.
* value - {String} Attribute value.
*/
setAttributeNS: function(node, uri, name, value) {
if(node.setAttributeNS) {
node.setAttributeNS(uri, name, value);
} else {
if(this.xmldom) {
if(uri) {
var attribute = node.ownerDocument.createNode(
2, name, uri
);
attribute.nodeValue = value;
node.setAttributeNode(attribute);
} else {
node.setAttribute(name, value);
}
} else {
throw "setAttributeNS not implemented";
}
}
},
/**
* Method: createElementNSPlus
* Shorthand for creating namespaced elements with optional attributes and
* child text nodes.
*
* Parameters:
* name - {String} The qualified node name.
* options - {Object} Optional object for node configuration.
*
* Valid options:
* uri - {String} Optional namespace uri for the element - supply a prefix
* instead if the namespace uri is a property of the format's namespace
* object.
* attributes - {Object} Optional attributes to be set using the
* <setAttributes> method.
* value - {String} Optional text to be appended as a text node.
*
* Returns:
* {Element} An element node.
*/
createElementNSPlus: function(name, options) {
options = options || {};
// order of prefix preference
// 1. in the uri option
// 2. in the prefix option
// 3. in the qualified name
// 4. from the defaultPrefix
var uri = options.uri || this.namespaces[options.prefix];
if(!uri) {
var loc = name.indexOf(":");
uri = this.namespaces[name.substring(0, loc)];
}
if(!uri) {
uri = this.namespaces[this.defaultPrefix];
}
var node = this.createElementNS(uri, name);
if(options.attributes) {
this.setAttributes(node, options.attributes);
}
var value = options.value;
if(value != null) {
node.appendChild(this.createTextNode(value));
}
return node;
},
/**
* Method: setAttributes
* Set multiple attributes given key value pairs from an object.
*
* Parameters:
* node - {Element} An element node.
* obj - {Object || Array} An object whose properties represent attribute
* names and values represent attribute values. If an attribute name
* is a qualified name ("prefix:local"), the prefix will be looked up
* in the parsers {namespaces} object. If the prefix is found,
* setAttributeNS will be used instead of setAttribute.
*/
setAttributes: function(node, obj) {
var value, uri;
for(var name in obj) {
if(obj[name] != null && obj[name].toString) {
value = obj[name].toString();
// check for qualified attribute name ("prefix:local")
uri = this.namespaces[name.substring(0, name.indexOf(":"))] || null;
this.setAttributeNS(node, uri, name, value);
}
}
},
/**
* Method: readNode
* Shorthand for applying one of the named readers given the node
* namespace and local name. Readers take two args (node, obj) and
* generally extend or modify the second.
*
* Parameters:
* node - {DOMElement} The node to be read (required).
* obj - {Object} The object to be modified (optional).
*
* Returns:
* {Object} The input object, modified (or a new one if none was provided).
*/
readNode: function(node, obj) {
if(!obj) {
obj = {};
}
var group = this.readers[node.namespaceURI ? this.namespaceAlias[node.namespaceURI]: this.defaultPrefix];
if(group) {
var local = node.localName || node.nodeName.split(":").pop();
var reader = group[local] || group["*"];
if(reader) {
reader.apply(this, [node, obj]);
}
}
return obj;
},
/**
* Method: readChildNodes
* Shorthand for applying the named readers to all children of a node.
* For each child of type 1 (element), <readSelf> is called.
*
* Parameters:
* node - {DOMElement} The node to be read (required).
* obj - {Object} The object to be modified (optional).
*
* Returns:
* {Object} The input object, modified.
*/
readChildNodes: function(node, obj) {
if(!obj) {
obj = {};
}
var children = node.childNodes;
var child;
for(var i=0, len=children.length; i<len; ++i) {
child = children[i];
if(child.nodeType == 1) {
this.readNode(child, obj);
}
}
return obj;
},
/**
* Method: writeNode
* Shorthand for applying one of the named writers and appending the
* results to a node. If a qualified name is not provided for the
* second argument (and a local name is used instead), the namespace
* of the parent node will be assumed.
*
* Parameters:
* name - {String} The name of a node to generate. If a qualified name
* (e.g. "pre:Name") is used, the namespace prefix is assumed to be
* in the <writers> group. If a local name is used (e.g. "Name") then
* the namespace of the parent is assumed. If a local name is used
* and no parent is supplied, then the default namespace is assumed.
* obj - {Object} Structure containing data for the writer.
* parent - {DOMElement} Result will be appended to this node. If no parent
* is supplied, the node will not be appended to anything.
*
* Returns:
* {DOMElement} The child node.
*/
writeNode: function(name, obj, parent) {
var prefix, local;
var split = name.indexOf(":");
if(split > 0) {
prefix = name.substring(0, split);
local = name.substring(split + 1);
} else {
if(parent) {
prefix = this.namespaceAlias[parent.namespaceURI];
} else {
prefix = this.defaultPrefix;
}
local = name;
}
var child = this.writers[prefix][local].apply(this, [obj]);
if(parent) {
parent.appendChild(child);
}
return child;
},
/**
* APIMethod: getChildEl
* Get the first child element. Optionally only return the first child
* if it matches the given name and namespace URI.
*
* Parameters:
* node - {DOMElement} The parent node.
* name - {String} Optional node name (local) to search for.
* uri - {String} Optional namespace URI to search for.
*
* Returns:
* {DOMElement} The first child. Returns null if no element is found, if
* something significant besides an element is found, or if the element
* found does not match the optional name and uri.
*/
getChildEl: function(node, name, uri) {
return node && this.getThisOrNextEl(node.firstChild, name, uri);
},
/**
* APIMethod: getNextEl
* Get the next sibling element. Optionally get the first sibling only
* if it matches the given local name and namespace URI.
*
* Parameters:
* node - {DOMElement} The node.
* name - {String} Optional local name of the sibling to search for.
* uri - {String} Optional namespace URI of the sibling to search for.
*
* Returns:
* {DOMElement} The next sibling element. Returns null if no element is
* found, something significant besides an element is found, or the
* found element does not match the optional name and uri.
*/
getNextEl: function(node, name, uri) {
return node && this.getThisOrNextEl(node.nextSibling, name, uri);
},
/**
* Method: getThisOrNextEl
* Return this node or the next element node. Optionally get the first
* sibling with the given local name or namespace URI.
*
* Parameters:
* node - {DOMElement} The node.
* name - {String} Optional local name of the sibling to search for.
* uri - {String} Optional namespace URI of the sibling to search for.
*
* Returns:
* {DOMElement} The next sibling element. Returns null if no element is
* found, something significant besides an element is found, or the
* found element does not match the query.
*/
getThisOrNextEl: function(node, name, uri) {
outer: for(var sibling=node; sibling; sibling=sibling.nextSibling) {
switch(sibling.nodeType) {
case 1: // Element
if((!name || name === (sibling.localName || sibling.nodeName.split(":").pop())) &&
(!uri || uri === sibling.namespaceURI)) {
// matches
break outer;
}
sibling = null;
break outer;
case 3: // Text
if(/^\s*$/.test(sibling.nodeValue)) {
break;
}
case 4: // CDATA
case 6: // ENTITY_NODE
case 12: // NOTATION_NODE
case 10: // DOCUMENT_TYPE_NODE
case 11: // DOCUMENT_FRAGMENT_NODE
sibling = null;
break outer;
} // ignore comments and processing instructions
}
return sibling || null;
},
/**
* APIMethod: lookupNamespaceURI
* Takes a prefix and returns the namespace URI associated with it on the given
* node if found (and null if not). Supplying null for the prefix will
* return the default namespace.
*
* For browsers that support it, this calls the native lookupNamesapceURI
* function. In other browsers, this is an implementation of
* http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespaceURI.
*
* For browsers that don't support the attribute.ownerElement property, this
* method cannot be called on attribute nodes.
*
* Parameters:
* node - {DOMElement} The node from which to start looking.
* prefix - {String} The prefix to lookup or null to lookup the default namespace.
*
* Returns:
* {String} The namespace URI for the given prefix. Returns null if the prefix
* cannot be found or the node is the wrong type.
*/
lookupNamespaceURI: function(node, prefix) {
var uri = null;
if(node) {
if(node.lookupNamespaceURI) {
uri = node.lookupNamespaceURI(prefix);
} else {
outer: switch(node.nodeType) {
case 1: // ELEMENT_NODE
if(node.namespaceURI !== null && node.prefix === prefix) {
uri = node.namespaceURI;
break outer;
}
var len = node.attributes.length;
if(len) {
var attr;
for(var i=0; i<len; ++i) {
attr = node.attributes[i];
if(attr.prefix === "xmlns" && attr.name === "xmlns:" + prefix) {
uri = attr.value || null;
break outer;
} else if(attr.name === "xmlns" && prefix === null) {
uri = attr.value || null;
break outer;
}
}
}
uri = this.lookupNamespaceURI(node.parentNode, prefix);
break outer;
case 2: // ATTRIBUTE_NODE
uri = this.lookupNamespaceURI(node.ownerElement, prefix);
break outer;
case 9: // DOCUMENT_NODE
uri = this.lookupNamespaceURI(node.documentElement, prefix);
break outer;
case 6: // ENTITY_NODE
case 12: // NOTATION_NODE
case 10: // DOCUMENT_TYPE_NODE
case 11: // DOCUMENT_FRAGMENT_NODE
break outer;
default:
// TEXT_NODE (3), CDATA_SECTION_NODE (4), ENTITY_REFERENCE_NODE (5),
// PROCESSING_INSTRUCTION_NODE (7), COMMENT_NODE (8)
uri = this.lookupNamespaceURI(node.parentNode, prefix);
break outer;
}
}
}
return uri;
},
/**
* Method: getXMLDoc
* Get an XML document for nodes that are not supported in HTML (e.g.
* createCDATASection). On IE, this will either return an existing or
* create a new <xmldom> on the instance. On other browsers, this will
* either return an existing or create a new shared document (see
* <OpenLayers.Format.XML.document>).
*
* Returns:
* {XMLDocument}
*/
getXMLDoc: function() {
if (!OpenLayers.Format.XML.document && !this.xmldom) {
if (document.implementation && document.implementation.createDocument) {
OpenLayers.Format.XML.document =
document.implementation.createDocument("", "", null);
} else if (!this.xmldom && window.ActiveXObject) {
this.xmldom = new ActiveXObject("Microsoft.XMLDOM");
}
}
return OpenLayers.Format.XML.document || this.xmldom;
},
CLASS_NAME: "OpenLayers.Format.XML"
});
OpenLayers.Format.XML.CONTENT_TYPE = {EMPTY: 0, SIMPLE: 1, COMPLEX: 2, MIXED: 3};
/**
* APIFunction: OpenLayers.Format.XML.lookupNamespaceURI
* Takes a prefix and returns the namespace URI associated with it on the given
* node if found (and null if not). Supplying null for the prefix will
* return the default namespace.
*
* For browsers that support it, this calls the native lookupNamesapceURI
* function. In other browsers, this is an implementation of
* http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespaceURI.
*
* For browsers that don't support the attribute.ownerElement property, this
* method cannot be called on attribute nodes.
*
* Parameters:
* node - {DOMElement} The node from which to start looking.
* prefix - {String} The prefix to lookup or null to lookup the default namespace.
*
* Returns:
* {String} The namespace URI for the given prefix. Returns null if the prefix
* cannot be found or the node is the wrong type.
*/
OpenLayers.Format.XML.lookupNamespaceURI = OpenLayers.Function.bind(
OpenLayers.Format.XML.prototype.lookupNamespaceURI,
OpenLayers.Format.XML.prototype
);
/**
* Property: OpenLayers.Format.XML.document
* {XMLDocument} XML document to reuse for creating non-HTML compliant nodes,
* like document.createCDATASection.
*/
OpenLayers.Format.XML.document = null;
/* ======================================================================
OpenLayers/Format/OGCExceptionReport.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
*/
/**
* Class: OpenLayers.Format.OGCExceptionReport
* Class to read exception reports for various OGC services and versions.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.OGCExceptionReport = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
ogc: "http://www.opengis.net/ogc"
},
/**
* Property: regExes
* Compiled regular expressions for manipulating strings.
*/
regExes: {
trimSpace: (/^\s*|\s*$/g),
removeSpace: (/\s*/g),
splitSpace: (/\s+/),
trimComma: (/\s*,\s*/g)
},
/**
* Property: defaultPrefix
*/
defaultPrefix: "ogc",
/**
* Constructor: OpenLayers.Format.OGCExceptionReport
* Create a new parser for OGC exception reports.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
/**
* APIMethod: read
* Read OGC exception report data from a string, and return an object with
* information about the exceptions.
*
* Parameters:
* data - {String} or {DOMElement} data to read/parse.
*
* Returns:
* {Object} Information about the exceptions that occurred.
*/
read: function(data) {
var result;
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
var root = data.documentElement;
var exceptionInfo = {exceptionReport: null};
if (root) {
this.readChildNodes(data, exceptionInfo);
if (exceptionInfo.exceptionReport === null) {
// fall-back to OWSCommon since this is a common output format for exceptions
// we cannot easily use the ows readers directly since they differ for 1.0 and 1.1
exceptionInfo = new OpenLayers.Format.OWSCommon().read(data);
}
}
return exceptionInfo;
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"ogc": {
"ServiceExceptionReport": function(node, obj) {
obj.exceptionReport = {exceptions: []};
this.readChildNodes(node, obj.exceptionReport);
},
"ServiceException": function(node, exceptionReport) {
var exception = {
code: node.getAttribute("code"),
locator: node.getAttribute("locator"),
text: this.getChildValue(node)
};
exceptionReport.exceptions.push(exception);
}
}
},
CLASS_NAME: "OpenLayers.Format.OGCExceptionReport"
});
/* ======================================================================
OpenLayers/Format/XML/VersionedOGC.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Format/OGCExceptionReport.js
*/
/**
* Class: OpenLayers.Format.XML.VersionedOGC
* Base class for versioned formats, i.e. a format which supports multiple
* versions.
*
* To enable checking if parsing succeeded, you will need to define a property
* called errorProperty on the parser you want to check. The parser will then
* check the returned object to see if that property is present. If it is, it
* assumes the parsing was successful. If it is not present (or is null), it will
* pass the document through an OGCExceptionReport parser.
*
* If errorProperty is undefined for the parser, this error checking mechanism
* will be disabled.
*
*
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.XML.VersionedOGC = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* APIProperty: defaultVersion
* {String} Version number to assume if none found.
*/
defaultVersion: null,
/**
* APIProperty: version
* {String} Specify a version string if one is known.
*/
version: null,
/**
* APIProperty: profile
* {String} If provided, use a custom profile.
*/
profile: null,
/**
* APIProperty: allowFallback
* {Boolean} If a profiled parser cannot be found for the returned version,
* use a non-profiled parser as the fallback. Application code using this
* should take into account that the return object structure might be
* missing the specifics of the profile. Defaults to false.
*/
allowFallback: false,
/**
* Property: name
* {String} The name of this parser, this is the part of the CLASS_NAME
* except for "OpenLayers.Format."
*/
name: null,
/**
* APIProperty: stringifyOutput
* {Boolean} If true, write will return a string otherwise a DOMElement.
* Default is false.
*/
stringifyOutput: false,
/**
* Property: parser
* {Object} Instance of the versioned parser. Cached for multiple read and
* write calls of the same version.
*/
parser: null,
/**
* Constructor: OpenLayers.Format.XML.VersionedOGC.
* Constructor.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on
* the object.
*/
initialize: function(options) {
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
var className = this.CLASS_NAME;
this.name = className.substring(className.lastIndexOf(".")+1);
},
/**
* Method: getVersion
* Returns the version to use. Subclasses can override this function
* if a different version detection is needed.
*
* Parameters:
* root - {DOMElement}
* options - {Object} Optional configuration object.
*
* Returns:
* {String} The version to use.
*/
getVersion: function(root, options) {
var version;
// read
if (root) {
version = this.version;
if(!version) {
version = root.getAttribute("version");
if(!version) {
version = this.defaultVersion;
}
}
} else { // write
version = (options && options.version) ||
this.version || this.defaultVersion;
}
return version;
},
/**
* Method: getParser
* Get an instance of the cached parser if available, otherwise create one.
*
* Parameters:
* version - {String}
*
* Returns:
* {<OpenLayers.Format>}
*/
getParser: function(version) {
version = version || this.defaultVersion;
var profile = this.profile ? "_" + this.profile : "";
if(!this.parser || this.parser.VERSION != version) {
var format = OpenLayers.Format[this.name][
"v" + version.replace(/\./g, "_") + profile
];
if(!format) {
if (profile !== "" && this.allowFallback) {
// fallback to the non-profiled version of the parser
profile = "";
format = OpenLayers.Format[this.name][
"v" + version.replace(/\./g, "_")
];
}
if (!format) {
throw "Can't find a " + this.name + " parser for version " +
version + profile;
}
}
this.parser = new format(this.options);
}
return this.parser;
},
/**
* APIMethod: write
* Write a document.
*
* Parameters:
* obj - {Object} An object representing the document.
* options - {Object} Optional configuration object.
*
* Returns:
* {String} The document as a string
*/
write: function(obj, options) {
var version = this.getVersion(null, options);
this.parser = this.getParser(version);
var root = this.parser.write(obj, options);
if (this.stringifyOutput === false) {
return root;
} else {
return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
}
},
/**
* APIMethod: read
* Read a doc and return an object representing the document.
*
* Parameters:
* data - {String | DOMElement} Data to read.
* options - {Object} Options for the reader.
*
* Returns:
* {Object} An object representing the document.
*/
read: function(data, options) {
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
var root = data.documentElement;
var version = this.getVersion(root);
this.parser = this.getParser(version); // Select the parser
var obj = this.parser.read(data, options); // Parse the data
var errorProperty = this.parser.errorProperty || null;
if (errorProperty !== null && obj[errorProperty] === undefined) {
// an error must have happened, so parse it and report back
var format = new OpenLayers.Format.OGCExceptionReport();
obj.error = format.read(data);
}
obj.version = version;
return obj;
},
CLASS_NAME: "OpenLayers.Format.XML.VersionedOGC"
});
/* ======================================================================
OpenLayers/Feature.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
*/
/**
* Class: OpenLayers.Feature
* Features are combinations of geography and attributes. The OpenLayers.Feature
* class specifically combines a marker and a lonlat.
*/
OpenLayers.Feature = OpenLayers.Class({
/**
* Property: layer
* {<OpenLayers.Layer>}
*/
layer: null,
/**
* Property: id
* {String}
*/
id: null,
/**
* Property: lonlat
* {<OpenLayers.LonLat>}
*/
lonlat: null,
/**
* Property: data
* {Object}
*/
data: null,
/**
* Property: marker
* {<OpenLayers.Marker>}
*/
marker: null,
/**
* APIProperty: popupClass
* {<OpenLayers.Class>} The class which will be used to instantiate
* a new Popup. Default is <OpenLayers.Popup.Anchored>.
*/
popupClass: null,
/**
* Property: popup
* {<OpenLayers.Popup>}
*/
popup: null,
/**
* Constructor: OpenLayers.Feature
* Constructor for features.
*
* Parameters:
* layer - {<OpenLayers.Layer>}
* lonlat - {<OpenLayers.LonLat>}
* data - {Object}
*
* Returns:
* {<OpenLayers.Feature>}
*/
initialize: function(layer, lonlat, data) {
this.layer = layer;
this.lonlat = lonlat;
this.data = (data != null) ? data : {};
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
},
/**
* Method: destroy
* nullify references to prevent circular references and memory leaks
*/
destroy: function() {
//remove the popup from the map
if ((this.layer != null) && (this.layer.map != null)) {
if (this.popup != null) {
this.layer.map.removePopup(this.popup);
}
}
// remove the marker from the layer
if (this.layer != null && this.marker != null) {
this.layer.removeMarker(this.marker);
}
this.layer = null;
this.id = null;
this.lonlat = null;
this.data = null;
if (this.marker != null) {
this.destroyMarker(this.marker);
this.marker = null;
}
if (this.popup != null) {
this.destroyPopup(this.popup);
this.popup = null;
}
},
/**
* Method: onScreen
*
* Returns:
* {Boolean} Whether or not the feature is currently visible on screen
* (based on its 'lonlat' property)
*/
onScreen:function() {
var onScreen = false;
if ((this.layer != null) && (this.layer.map != null)) {
var screenBounds = this.layer.map.getExtent();
onScreen = screenBounds.containsLonLat(this.lonlat);
}
return onScreen;
},
/**
* Method: createMarker
* Based on the data associated with the Feature, create and return a marker object.
*
* Returns:
* {<OpenLayers.Marker>} A Marker Object created from the 'lonlat' and 'icon' properties
* set in this.data. If no 'lonlat' is set, returns null. If no
* 'icon' is set, OpenLayers.Marker() will load the default image.
*
* Note - this.marker is set to return value
*
*/
createMarker: function() {
if (this.lonlat != null) {
this.marker = new OpenLayers.Marker(this.lonlat, this.data.icon);
}
return this.marker;
},
/**
* Method: destroyMarker
* Destroys marker.
* If user overrides the createMarker() function, s/he should be able
* to also specify an alternative function for destroying it
*/
destroyMarker: function() {
this.marker.destroy();
},
/**
* Method: createPopup
* Creates a popup object created from the 'lonlat', 'popupSize',
* and 'popupContentHTML' properties set in this.data. It uses
* this.marker.icon as default anchor.
*
* If no 'lonlat' is set, returns null.
* If no this.marker has been created, no anchor is sent.
*
* Note - the returned popup object is 'owned' by the feature, so you
* cannot use the popup's destroy method to discard the popup.
* Instead, you must use the feature's destroyPopup
*
* Note - this.popup is set to return value
*
* Parameters:
* closeBox - {Boolean} create popup with closebox or not
*
* Returns:
* {<OpenLayers.Popup>} Returns the created popup, which is also set
* as 'popup' property of this feature. Will be of whatever type
* specified by this feature's 'popupClass' property, but must be
* of type <OpenLayers.Popup>.
*
*/
createPopup: function(closeBox) {
if (this.lonlat != null) {
if (!this.popup) {
var anchor = (this.marker) ? this.marker.icon : null;
var popupClass = this.popupClass ?
this.popupClass : OpenLayers.Popup.Anchored;
this.popup = new popupClass(this.id + "_popup",
this.lonlat,
this.data.popupSize,
this.data.popupContentHTML,
anchor,
closeBox);
}
if (this.data.overflow != null) {
this.popup.contentDiv.style.overflow = this.data.overflow;
}
this.popup.feature = this;
}
return this.popup;
},
/**
* Method: destroyPopup
* Destroys the popup created via createPopup.
*
* As with the marker, if user overrides the createPopup() function, s/he
* should also be able to override the destruction
*/
destroyPopup: function() {
if (this.popup) {
this.popup.feature = null;
this.popup.destroy();
this.popup = null;
}
},
CLASS_NAME: "OpenLayers.Feature"
});
/* ======================================================================
OpenLayers/Feature/Vector.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
// TRASH THIS
OpenLayers.State = {
/** states */
UNKNOWN: 'Unknown',
INSERT: 'Insert',
UPDATE: 'Update',
DELETE: 'Delete'
};
/**
* @requires OpenLayers/Feature.js
* @requires OpenLayers/Util.js
*/
/**
* Class: OpenLayers.Feature.Vector
* Vector features use the OpenLayers.Geometry classes as geometry description.
* They have an 'attributes' property, which is the data object, and a 'style'
* property, the default values of which are defined in the
* <OpenLayers.Feature.Vector.style> objects.
*
* Inherits from:
* - <OpenLayers.Feature>
*/
OpenLayers.Feature.Vector = OpenLayers.Class(OpenLayers.Feature, {
/**
* Property: fid
* {String}
*/
fid: null,
/**
* APIProperty: geometry
* {<OpenLayers.Geometry>}
*/
geometry: null,
/**
* APIProperty: attributes
* {Object} This object holds arbitrary, serializable properties that
* describe the feature.
*/
attributes: null,
/**
* Property: bounds
* {<OpenLayers.Bounds>} The box bounding that feature's geometry, that
* property can be set by an <OpenLayers.Format> object when
* deserializing the feature, so in most cases it represents an
* information set by the server.
*/
bounds: null,
/**
* Property: state
* {String}
*/
state: null,
/**
* APIProperty: style
* {Object}
*/
style: null,
/**
* APIProperty: url
* {String} If this property is set it will be taken into account by
* {<OpenLayers.HTTP>} when upadting or deleting the feature.
*/
url: null,
/**
* Property: renderIntent
* {String} rendering intent currently being used
*/
renderIntent: "default",
/**
* APIProperty: modified
* {Object} An object with the originals of the geometry and attributes of
* the feature, if they were changed. Currently this property is only read
* by <OpenLayers.Format.WFST.v1>, and written by
* <OpenLayers.Control.ModifyFeature>, which sets the geometry property.
* Applications can set the originals of modified attributes in the
* attributes property. Note that applications have to check if this
* object and the attributes property is already created before using it.
* After a change made with ModifyFeature, this object could look like
*
* (code)
* {
* geometry: >Object
* }
* (end)
*
* When an application has made changes to feature attributes, it could
* have set the attributes to something like this:
*
* (code)
* {
* attributes: {
* myAttribute: "original"
* }
* }
* (end)
*
* Note that <OpenLayers.Format.WFST.v1> only checks for truthy values in
* *modified.geometry* and the attribute names in *modified.attributes*,
* but it is recommended to set the original values (and not just true) as
* attribute value, so applications could use this information to undo
* changes.
*/
modified: null,
/**
* Constructor: OpenLayers.Feature.Vector
* Create a vector feature.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The geometry that this feature
* represents.
* attributes - {Object} An optional object that will be mapped to the
* <attributes> property.
* style - {Object} An optional style object.
*/
initialize: function(geometry, attributes, style) {
OpenLayers.Feature.prototype.initialize.apply(this,
[null, null, attributes]);
this.lonlat = null;
this.geometry = geometry ? geometry : null;
this.state = null;
this.attributes = {};
if (attributes) {
this.attributes = OpenLayers.Util.extend(this.attributes,
attributes);
}
this.style = style ? style : null;
},
/**
* Method: destroy
* nullify references to prevent circular references and memory leaks
*/
destroy: function() {
if (this.layer) {
this.layer.removeFeatures(this);
this.layer = null;
}
this.geometry = null;
this.modified = null;
OpenLayers.Feature.prototype.destroy.apply(this, arguments);
},
/**
* Method: clone
* Create a clone of this vector feature. Does not set any non-standard
* properties.
*
* Returns:
* {<OpenLayers.Feature.Vector>} An exact clone of this vector feature.
*/
clone: function () {
return new OpenLayers.Feature.Vector(
this.geometry ? this.geometry.clone() : null,
this.attributes,
this.style);
},
/**
* Method: onScreen
* Determine whether the feature is within the map viewport. This method
* tests for an intersection between the geometry and the viewport
* bounds. If a more effecient but less precise geometry bounds
* intersection is desired, call the method with the boundsOnly
* parameter true.
*
* Parameters:
* boundsOnly - {Boolean} Only test whether a feature's bounds intersects
* the viewport bounds. Default is false. If false, the feature's
* geometry must intersect the viewport for onScreen to return true.
*
* Returns:
* {Boolean} The feature is currently visible on screen (optionally
* based on its bounds if boundsOnly is true).
*/
onScreen:function(boundsOnly) {
var onScreen = false;
if(this.layer && this.layer.map) {
var screenBounds = this.layer.map.getExtent();
if(boundsOnly) {
var featureBounds = this.geometry.getBounds();
onScreen = screenBounds.intersectsBounds(featureBounds);
} else {
var screenPoly = screenBounds.toGeometry();
onScreen = screenPoly.intersects(this.geometry);
}
}
return onScreen;
},
/**
* Method: getVisibility
* Determine whether the feature is displayed or not. It may not displayed
* because:
* - its style display property is set to 'none',
* - it doesn't belong to any layer,
* - the styleMap creates a symbolizer with display property set to 'none'
* for it,
* - the layer which it belongs to is not visible.
*
* Returns:
* {Boolean} The feature is currently displayed.
*/
getVisibility: function() {
return !(this.style && this.style.display == 'none' ||
!this.layer ||
this.layer && this.layer.styleMap &&
this.layer.styleMap.createSymbolizer(this, this.renderIntent).display == 'none' ||
this.layer && !this.layer.getVisibility());
},
/**
* Method: createMarker
* HACK - we need to decide if all vector features should be able to
* create markers
*
* Returns:
* {<OpenLayers.Marker>} For now just returns null
*/
createMarker: function() {
return null;
},
/**
* Method: destroyMarker
* HACK - we need to decide if all vector features should be able to
* delete markers
*
* If user overrides the createMarker() function, s/he should be able
* to also specify an alternative function for destroying it
*/
destroyMarker: function() {
// pass
},
/**
* Method: createPopup
* HACK - we need to decide if all vector features should be able to
* create popups
*
* Returns:
* {<OpenLayers.Popup>} For now just returns null
*/
createPopup: function() {
return null;
},
/**
* Method: atPoint
* Determins whether the feature intersects with the specified location.
*
* Parameters:
* lonlat - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
* object with a 'lon' and 'lat' properties.
* toleranceLon - {float} Optional tolerance in Geometric Coords
* toleranceLat - {float} Optional tolerance in Geographic Coords
*
* Returns:
* {Boolean} Whether or not the feature is at the specified location
*/
atPoint: function(lonlat, toleranceLon, toleranceLat) {
var atPoint = false;
if(this.geometry) {
atPoint = this.geometry.atPoint(lonlat, toleranceLon,
toleranceLat);
}
return atPoint;
},
/**
* Method: destroyPopup
* HACK - we need to decide if all vector features should be able to
* delete popups
*/
destroyPopup: function() {
// pass
},
/**
* Method: move
* Moves the feature and redraws it at its new location
*
* Parameters:
* location - {<OpenLayers.LonLat> or <OpenLayers.Pixel>} the
* location to which to move the feature.
*/
move: function(location) {
if(!this.layer || !this.geometry.move){
//do nothing if no layer or immoveable geometry
return undefined;
}
var pixel;
if (location.CLASS_NAME == "OpenLayers.LonLat") {
pixel = this.layer.getViewPortPxFromLonLat(location);
} else {
pixel = location;
}
var lastPixel = this.layer.getViewPortPxFromLonLat(this.geometry.getBounds().getCenterLonLat());
var res = this.layer.map.getResolution();
this.geometry.move(res * (pixel.x - lastPixel.x),
res * (lastPixel.y - pixel.y));
this.layer.drawFeature(this);
return lastPixel;
},
/**
* Method: toState
* Sets the new state
*
* Parameters:
* state - {String}
*/
toState: function(state) {
if (state == OpenLayers.State.UPDATE) {
switch (this.state) {
case OpenLayers.State.UNKNOWN:
case OpenLayers.State.DELETE:
this.state = state;
break;
case OpenLayers.State.UPDATE:
case OpenLayers.State.INSERT:
break;
}
} else if (state == OpenLayers.State.INSERT) {
switch (this.state) {
case OpenLayers.State.UNKNOWN:
break;
default:
this.state = state;
break;
}
} else if (state == OpenLayers.State.DELETE) {
switch (this.state) {
case OpenLayers.State.INSERT:
// the feature should be destroyed
break;
case OpenLayers.State.DELETE:
break;
case OpenLayers.State.UNKNOWN:
case OpenLayers.State.UPDATE:
this.state = state;
break;
}
} else if (state == OpenLayers.State.UNKNOWN) {
this.state = state;
}
},
CLASS_NAME: "OpenLayers.Feature.Vector"
});
/**
* Constant: OpenLayers.Feature.Vector.style
* OpenLayers features can have a number of style attributes. The 'default'
* style will typically be used if no other style is specified. These
* styles correspond for the most part, to the styling properties defined
* by the SVG standard.
* Information on fill properties: http://www.w3.org/TR/SVG/painting.html#FillProperties
* Information on stroke properties: http://www.w3.org/TR/SVG/painting.html#StrokeProperties
*
* Symbolizer properties:
* fill - {Boolean} Set to false if no fill is desired.
* fillColor - {String} Hex fill color. Default is "#ee9900".
* fillOpacity - {Number} Fill opacity (0-1). Default is 0.4
* stroke - {Boolean} Set to false if no stroke is desired.
* strokeColor - {String} Hex stroke color. Default is "#ee9900".
* strokeOpacity - {Number} Stroke opacity (0-1). Default is 1.
* strokeWidth - {Number} Pixel stroke width. Default is 1.
* strokeLinecap - {String} Stroke cap type. Default is "round". [butt | round | square]
* strokeDashstyle - {String} Stroke dash style. Default is "solid". [dot | dash | dashdot | longdash | longdashdot | solid]
* graphic - {Boolean} Set to false if no graphic is desired.
* pointRadius - {Number} Pixel point radius. Default is 6.
* pointerEvents - {String} Default is "visiblePainted".
* cursor - {String} Default is "".
* externalGraphic - {String} Url to an external graphic that will be used for rendering points.
* graphicWidth - {Number} Pixel width for sizing an external graphic.
* graphicHeight - {Number} Pixel height for sizing an external graphic.
* graphicOpacity - {Number} Opacity (0-1) for an external graphic.
* graphicXOffset - {Number} Pixel offset along the positive x axis for displacing an external graphic.
* graphicYOffset - {Number} Pixel offset along the positive y axis for displacing an external graphic.
* rotation - {Number} For point symbolizers, this is the rotation of a graphic in the clockwise direction about its center point (or any point off center as specified by graphicXOffset and graphicYOffset).
* graphicZIndex - {Number} The integer z-index value to use in rendering.
* graphicName - {String} Named graphic to use when rendering points. Supported values include "circle" (default),
* "square", "star", "x", "cross", "triangle".
* graphicTitle - {String} Tooltip when hovering over a feature. *deprecated*, use title instead
* title - {String} Tooltip when hovering over a feature. Not supported by the canvas renderer.
* backgroundGraphic - {String} Url to a graphic to be used as the background under an externalGraphic.
* backgroundGraphicZIndex - {Number} The integer z-index value to use in rendering the background graphic.
* backgroundXOffset - {Number} The x offset (in pixels) for the background graphic.
* backgroundYOffset - {Number} The y offset (in pixels) for the background graphic.
* backgroundHeight - {Number} The height of the background graphic. If not provided, the graphicHeight will be used.
* backgroundWidth - {Number} The width of the background width. If not provided, the graphicWidth will be used.
* label - {String} The text for an optional label. For browsers that use the canvas renderer, this requires either
* fillText or mozDrawText to be available.
* labelAlign - {String} Label alignment. This specifies the insertion point relative to the text. It is a string
* composed of two characters. The first character is for the horizontal alignment, the second for the vertical
* alignment. Valid values for horizontal alignment: "l"=left, "c"=center, "r"=right. Valid values for vertical
* alignment: "t"=top, "m"=middle, "b"=bottom. Example values: "lt", "cm", "rb". Default is "cm".
* labelXOffset - {Number} Pixel offset along the positive x axis for displacing the label. Not supported by the canvas renderer.
* labelYOffset - {Number} Pixel offset along the positive y axis for displacing the label. Not supported by the canvas renderer.
* labelSelect - {Boolean} If set to true, labels will be selectable using SelectFeature or similar controls.
* Default is false.
* labelOutlineColor - {String} The color of the label outline. Default is 'white'. Only supported by the canvas & SVG renderers.
* labelOutlineWidth - {Number} The width of the label outline. Default is 3, set to 0 or null to disable. Only supported by the SVG renderers.
* labelOutlineOpacity - {Number} The opacity (0-1) of the label outline. Default is fontOpacity. Only supported by the canvas & SVG renderers.
* fontColor - {String} The font color for the label, to be provided like CSS.
* fontOpacity - {Number} Opacity (0-1) for the label
* fontFamily - {String} The font family for the label, to be provided like in CSS.
* fontSize - {String} The font size for the label, to be provided like in CSS.
* fontStyle - {String} The font style for the label, to be provided like in CSS.
* fontWeight - {String} The font weight for the label, to be provided like in CSS.
* display - {String} Symbolizers will have no effect if display is set to "none". All other values have no effect.
*/
OpenLayers.Feature.Vector.style = {
'default': {
fillColor: "#ee9900",
fillOpacity: 0.4,
hoverFillColor: "white",
hoverFillOpacity: 0.8,
strokeColor: "#ee9900",
strokeOpacity: 1,
strokeWidth: 1,
strokeLinecap: "round",
strokeDashstyle: "solid",
hoverStrokeColor: "red",
hoverStrokeOpacity: 1,
hoverStrokeWidth: 0.2,
pointRadius: 6,
hoverPointRadius: 1,
hoverPointUnit: "%",
pointerEvents: "visiblePainted",
cursor: "inherit",
fontColor: "#000000",
labelAlign: "cm",
labelOutlineColor: "white",
labelOutlineWidth: 3
},
'select': {
fillColor: "blue",
fillOpacity: 0.4,
hoverFillColor: "white",
hoverFillOpacity: 0.8,
strokeColor: "blue",
strokeOpacity: 1,
strokeWidth: 2,
strokeLinecap: "round",
strokeDashstyle: "solid",
hoverStrokeColor: "red",
hoverStrokeOpacity: 1,
hoverStrokeWidth: 0.2,
pointRadius: 6,
hoverPointRadius: 1,
hoverPointUnit: "%",
pointerEvents: "visiblePainted",
cursor: "pointer",
fontColor: "#000000",
labelAlign: "cm",
labelOutlineColor: "white",
labelOutlineWidth: 3
},
'temporary': {
fillColor: "#66cccc",
fillOpacity: 0.2,
hoverFillColor: "white",
hoverFillOpacity: 0.8,
strokeColor: "#66cccc",
strokeOpacity: 1,
strokeLinecap: "round",
strokeWidth: 2,
strokeDashstyle: "solid",
hoverStrokeColor: "red",
hoverStrokeOpacity: 1,
hoverStrokeWidth: 0.2,
pointRadius: 6,
hoverPointRadius: 1,
hoverPointUnit: "%",
pointerEvents: "visiblePainted",
cursor: "inherit",
fontColor: "#000000",
labelAlign: "cm",
labelOutlineColor: "white",
labelOutlineWidth: 3
},
'delete': {
display: "none"
}
};
/* ======================================================================
OpenLayers/Style.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
* @requires OpenLayers/Feature/Vector.js
*/
/**
* Class: OpenLayers.Style
* This class represents a UserStyle obtained
* from a SLD, containing styling rules.
*/
OpenLayers.Style = OpenLayers.Class({
/**
* Property: id
* {String} A unique id for this session.
*/
id: null,
/**
* APIProperty: name
* {String}
*/
name: null,
/**
* Property: title
* {String} Title of this style (set if included in SLD)
*/
title: null,
/**
* Property: description
* {String} Description of this style (set if abstract is included in SLD)
*/
description: null,
/**
* APIProperty: layerName
* {<String>} name of the layer that this style belongs to, usually
* according to the NamedLayer attribute of an SLD document.
*/
layerName: null,
/**
* APIProperty: isDefault
* {Boolean}
*/
isDefault: false,
/**
* Property: rules
* {Array(<OpenLayers.Rule>)}
*/
rules: null,
/**
* APIProperty: context
* {Object} An optional object with properties that symbolizers' property
* values should be evaluated against. If no context is specified,
* feature.attributes will be used
*/
context: null,
/**
* Property: defaultStyle
* {Object} hash of style properties to use as default for merging
* rule-based style symbolizers onto. If no rules are defined,
* createSymbolizer will return this style. If <defaultsPerSymbolizer> is set to
* true, the defaultStyle will only be taken into account if there are
* rules defined.
*/
defaultStyle: null,
/**
* Property: defaultsPerSymbolizer
* {Boolean} If set to true, the <defaultStyle> will extend the symbolizer
* of every rule. Properties of the <defaultStyle> will also be used to set
* missing symbolizer properties if the symbolizer has stroke, fill or
* graphic set to true. Default is false.
*/
defaultsPerSymbolizer: false,
/**
* Property: propertyStyles
* {Hash of Boolean} cache of style properties that need to be parsed for
* propertyNames. Property names are keys, values won't be used.
*/
propertyStyles: null,
/**
* Constructor: OpenLayers.Style
* Creates a UserStyle.
*
* Parameters:
* style - {Object} Optional hash of style properties that will be
* used as default style for this style object. This style
* applies if no rules are specified. Symbolizers defined in
* rules will extend this default style.
* options - {Object} An optional object with properties to set on the
* style.
*
* Valid options:
* rules - {Array(<OpenLayers.Rule>)} List of rules to be added to the
* style.
*
* Returns:
* {<OpenLayers.Style>}
*/
initialize: function(style, options) {
OpenLayers.Util.extend(this, options);
this.rules = [];
if(options && options.rules) {
this.addRules(options.rules);
}
// use the default style from OpenLayers.Feature.Vector if no style
// was given in the constructor
this.setDefaultStyle(style ||
OpenLayers.Feature.Vector.style["default"]);
this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
},
/**
* APIMethod: destroy
* nullify references to prevent circular references and memory leaks
*/
destroy: function() {
for (var i=0, len=this.rules.length; i<len; i++) {
this.rules[i].destroy();
this.rules[i] = null;
}
this.rules = null;
this.defaultStyle = null;
},
/**
* Method: createSymbolizer
* creates a style by applying all feature-dependent rules to the base
* style.
*
* Parameters:
* feature - {<OpenLayers.Feature>} feature to evaluate rules for
*
* Returns:
* {Object} symbolizer hash
*/
createSymbolizer: function(feature) {
var style = this.defaultsPerSymbolizer ? {} : this.createLiterals(
OpenLayers.Util.extend({}, this.defaultStyle), feature);
var rules = this.rules;
var rule, context;
var elseRules = [];
var appliedRules = false;
for(var i=0, len=rules.length; i<len; i++) {
rule = rules[i];
// does the rule apply?
var applies = rule.evaluate(feature);
if(applies) {
if(rule instanceof OpenLayers.Rule && rule.elseFilter) {
elseRules.push(rule);
} else {
appliedRules = true;
this.applySymbolizer(rule, style, feature);
}
}
}
// if no other rules apply, apply the rules with else filters
if(appliedRules == false && elseRules.length > 0) {
appliedRules = true;
for(var i=0, len=elseRules.length; i<len; i++) {
this.applySymbolizer(elseRules[i], style, feature);
}
}
// don't display if there were rules but none applied
if(rules.length > 0 && appliedRules == false) {
style.display = "none";
}
if (style.label != null && typeof style.label !== "string") {
style.label = String(style.label);
}
return style;
},
/**
* Method: applySymbolizer
*
* Parameters:
* rule - {<OpenLayers.Rule>}
* style - {Object}
* feature - {<OpenLayer.Feature.Vector>}
*
* Returns:
* {Object} A style with new symbolizer applied.
*/
applySymbolizer: function(rule, style, feature) {
var symbolizerPrefix = feature.geometry ?
this.getSymbolizerPrefix(feature.geometry) :
OpenLayers.Style.SYMBOLIZER_PREFIXES[0];
var symbolizer = rule.symbolizer[symbolizerPrefix] || rule.symbolizer;
if(this.defaultsPerSymbolizer === true) {
var defaults = this.defaultStyle;
OpenLayers.Util.applyDefaults(symbolizer, {
pointRadius: defaults.pointRadius
});
if(symbolizer.stroke === true || symbolizer.graphic === true) {
OpenLayers.Util.applyDefaults(symbolizer, {
strokeWidth: defaults.strokeWidth,
strokeColor: defaults.strokeColor,
strokeOpacity: defaults.strokeOpacity,
strokeDashstyle: defaults.strokeDashstyle,
strokeLinecap: defaults.strokeLinecap
});
}
if(symbolizer.fill === true || symbolizer.graphic === true) {
OpenLayers.Util.applyDefaults(symbolizer, {
fillColor: defaults.fillColor,
fillOpacity: defaults.fillOpacity
});
}
if(symbolizer.graphic === true) {
OpenLayers.Util.applyDefaults(symbolizer, {
pointRadius: this.defaultStyle.pointRadius,
externalGraphic: this.defaultStyle.externalGraphic,
graphicName: this.defaultStyle.graphicName,
graphicOpacity: this.defaultStyle.graphicOpacity,
graphicWidth: this.defaultStyle.graphicWidth,
graphicHeight: this.defaultStyle.graphicHeight,
graphicXOffset: this.defaultStyle.graphicXOffset,
graphicYOffset: this.defaultStyle.graphicYOffset
});
}
}
// merge the style with the current style
return this.createLiterals(
OpenLayers.Util.extend(style, symbolizer), feature);
},
/**
* Method: createLiterals
* creates literals for all style properties that have an entry in
* <this.propertyStyles>.
*
* Parameters:
* style - {Object} style to create literals for. Will be modified
* inline.
* feature - {Object}
*
* Returns:
* {Object} the modified style
*/
createLiterals: function(style, feature) {
var context = OpenLayers.Util.extend({}, feature.attributes || feature.data);
OpenLayers.Util.extend(context, this.context);
for (var i in this.propertyStyles) {
style[i] = OpenLayers.Style.createLiteral(style[i], context, feature, i);
}
return style;
},
/**
* Method: findPropertyStyles
* Looks into all rules for this style and the defaultStyle to collect
* all the style hash property names containing ${...} strings that have
* to be replaced using the createLiteral method before returning them.
*
* Returns:
* {Object} hash of property names that need createLiteral parsing. The
* name of the property is the key, and the value is true;
*/
findPropertyStyles: function() {
var propertyStyles = {};
// check the default style
var style = this.defaultStyle;
this.addPropertyStyles(propertyStyles, style);
// walk through all rules to check for properties in their symbolizer
var rules = this.rules;
var symbolizer, value;
for (var i=0, len=rules.length; i<len; i++) {
symbolizer = rules[i].symbolizer;
for (var key in symbolizer) {
value = symbolizer[key];
if (typeof value == "object") {
// symbolizer key is "Point", "Line" or "Polygon"
this.addPropertyStyles(propertyStyles, value);
} else {
// symbolizer is a hash of style properties
this.addPropertyStyles(propertyStyles, symbolizer);
break;
}
}
}
return propertyStyles;
},
/**
* Method: addPropertyStyles
*
* Parameters:
* propertyStyles - {Object} hash to add new property styles to. Will be
* modified inline
* symbolizer - {Object} search this symbolizer for property styles
*
* Returns:
* {Object} propertyStyles hash
*/
addPropertyStyles: function(propertyStyles, symbolizer) {
var property;
for (var key in symbolizer) {
property = symbolizer[key];
if (typeof property == "string" &&
property.match(/\$\{\w+\}/)) {
propertyStyles[key] = true;
}
}
return propertyStyles;
},
/**
* APIMethod: addRules
* Adds rules to this style.
*
* Parameters:
* rules - {Array(<OpenLayers.Rule>)}
*/
addRules: function(rules) {
Array.prototype.push.apply(this.rules, rules);
this.propertyStyles = this.findPropertyStyles();
},
/**
* APIMethod: setDefaultStyle
* Sets the default style for this style object.
*
* Parameters:
* style - {Object} Hash of style properties
*/
setDefaultStyle: function(style) {
this.defaultStyle = style;
this.propertyStyles = this.findPropertyStyles();
},
/**
* Method: getSymbolizerPrefix
* Returns the correct symbolizer prefix according to the
* geometry type of the passed geometry
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {String} key of the according symbolizer
*/
getSymbolizerPrefix: function(geometry) {
var prefixes = OpenLayers.Style.SYMBOLIZER_PREFIXES;
for (var i=0, len=prefixes.length; i<len; i++) {
if (geometry.CLASS_NAME.indexOf(prefixes[i]) != -1) {
return prefixes[i];
}
}
},
/**
* APIMethod: clone
* Clones this style.
*
* Returns:
* {<OpenLayers.Style>} Clone of this style.
*/
clone: function() {
var options = OpenLayers.Util.extend({}, this);
// clone rules
if(this.rules) {
options.rules = [];
for(var i=0, len=this.rules.length; i<len; ++i) {
options.rules.push(this.rules[i].clone());
}
}
// clone context
options.context = this.context && OpenLayers.Util.extend({}, this.context);
//clone default style
var defaultStyle = OpenLayers.Util.extend({}, this.defaultStyle);
return new OpenLayers.Style(defaultStyle, options);
},
CLASS_NAME: "OpenLayers.Style"
});
/**
* Function: createLiteral
* converts a style value holding a combination of PropertyName and Literal
* into a Literal, taking the property values from the passed features.
*
* Parameters:
* value - {String} value to parse. If this string contains a construct like
* "foo ${bar}", then "foo " will be taken as literal, and "${bar}"
* will be replaced by the value of the "bar" attribute of the passed
* feature.
* context - {Object} context to take attribute values from
* feature - {<OpenLayers.Feature.Vector>} optional feature to pass to
* <OpenLayers.String.format> for evaluating functions in the
* context.
* property - {String} optional, name of the property for which the literal is
* being created for evaluating functions in the context.
*
* Returns:
* {String} the parsed value. In the example of the value parameter above, the
* result would be "foo valueOfBar", assuming that the passed feature has an
* attribute named "bar" with the value "valueOfBar".
*/
OpenLayers.Style.createLiteral = function(value, context, feature, property) {
if (typeof value == "string" && value.indexOf("${") != -1) {
value = OpenLayers.String.format(value, context, [feature, property]);
value = (isNaN(value) || !value) ? value : parseFloat(value);
}
return value;
};
/**
* Constant: OpenLayers.Style.SYMBOLIZER_PREFIXES
* {Array} prefixes of the sld symbolizers. These are the
* same as the main geometry types
*/
OpenLayers.Style.SYMBOLIZER_PREFIXES = ['Point', 'Line', 'Polygon', 'Text',
'Raster'];
/* ======================================================================
OpenLayers/Filter.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Util.js
* @requires OpenLayers/Style.js
*/
/**
* Class: OpenLayers.Filter
* This class represents an OGC Filter.
*/
OpenLayers.Filter = OpenLayers.Class({
/**
* Constructor: OpenLayers.Filter
* This class represents a generic filter.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Returns:
* {<OpenLayers.Filter>}
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
},
/**
* APIMethod: destroy
* Remove reference to anything added.
*/
destroy: function() {
},
/**
* APIMethod: evaluate
* Evaluates this filter in a specific context. Instances or subclasses
* are supposed to override this method.
*
* Parameters:
* context - {Object} Context to use in evaluating the filter. If a vector
* feature is provided, the feature.attributes will be used as context.
*
* Returns:
* {Boolean} The filter applies.
*/
evaluate: function(context) {
return true;
},
/**
* APIMethod: clone
* Clones this filter. Should be implemented by subclasses.
*
* Returns:
* {<OpenLayers.Filter>} Clone of this filter.
*/
clone: function() {
return null;
},
/**
* APIMethod: toString
*
* Returns:
* {String} Include <OpenLayers.Format.CQL> in your build to get a CQL
* representation of the filter returned. Otherwise "[Object object]"
* will be returned.
*/
toString: function() {
var string;
if (OpenLayers.Format && OpenLayers.Format.CQL) {
string = OpenLayers.Format.CQL.prototype.write(this);
} else {
string = Object.prototype.toString.call(this);
}
return string;
},
CLASS_NAME: "OpenLayers.Filter"
});
/* ======================================================================
OpenLayers/Filter/FeatureId.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.FeatureId
* This class represents a ogc:FeatureId Filter, as being used for rule-based SLD
* styling
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.FeatureId = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: fids
* {Array(String)} Feature Ids to evaluate this rule against.
* To be passed inside the params object.
*/
fids: null,
/**
* Property: type
* {String} Type to identify this filter.
*/
type: "FID",
/**
* Constructor: OpenLayers.Filter.FeatureId
* Creates an ogc:FeatureId rule.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* rule
*
* Returns:
* {<OpenLayers.Filter.FeatureId>}
*/
initialize: function(options) {
this.fids = [];
OpenLayers.Filter.prototype.initialize.apply(this, [options]);
},
/**
* APIMethod: evaluate
* evaluates this rule for a specific feature
*
* Parameters:
* feature - {<OpenLayers.Feature>} feature to apply the rule to.
* For vector features, the check is run against the fid,
* for plain features against the id.
*
* Returns:
* {Boolean} true if the rule applies, false if it does not
*/
evaluate: function(feature) {
for (var i=0, len=this.fids.length; i<len; i++) {
var fid = feature.fid || feature.id;
if (fid == this.fids[i]) {
return true;
}
}
return false;
},
/**
* APIMethod: clone
* Clones this filter.
*
* Returns:
* {<OpenLayers.Filter.FeatureId>} Clone of this filter.
*/
clone: function() {
var filter = new OpenLayers.Filter.FeatureId();
OpenLayers.Util.extend(filter, this);
filter.fids = this.fids.slice();
return filter;
},
CLASS_NAME: "OpenLayers.Filter.FeatureId"
});
/* ======================================================================
OpenLayers/Filter/Logical.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.Logical
* This class represents ogc:And, ogc:Or and ogc:Not rules.
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.Logical = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: filters
* {Array(<OpenLayers.Filter>)} Child filters for this filter.
*/
filters: null,
/**
* APIProperty: type
* {String} type of logical operator. Available types are:
* - OpenLayers.Filter.Logical.AND = "&&";
* - OpenLayers.Filter.Logical.OR = "||";
* - OpenLayers.Filter.Logical.NOT = "!";
*/
type: null,
/**
* Constructor: OpenLayers.Filter.Logical
* Creates a logical filter (And, Or, Not).
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* filter.
*
* Returns:
* {<OpenLayers.Filter.Logical>}
*/
initialize: function(options) {
this.filters = [];
OpenLayers.Filter.prototype.initialize.apply(this, [options]);
},
/**
* APIMethod: destroy
* Remove reference to child filters.
*/
destroy: function() {
this.filters = null;
OpenLayers.Filter.prototype.destroy.apply(this);
},
/**
* APIMethod: evaluate
* Evaluates this filter in a specific context.
*
* Parameters:
* context - {Object} Context to use in evaluating the filter. A vector
* feature may also be provided to evaluate feature attributes in
* comparison filters or geometries in spatial filters.
*
* Returns:
* {Boolean} The filter applies.
*/
evaluate: function(context) {
var i, len;
switch(this.type) {
case OpenLayers.Filter.Logical.AND:
for (i=0, len=this.filters.length; i<len; i++) {
if (this.filters[i].evaluate(context) == false) {
return false;
}
}
return true;
case OpenLayers.Filter.Logical.OR:
for (i=0, len=this.filters.length; i<len; i++) {
if (this.filters[i].evaluate(context) == true) {
return true;
}
}
return false;
case OpenLayers.Filter.Logical.NOT:
return (!this.filters[0].evaluate(context));
}
return undefined;
},
/**
* APIMethod: clone
* Clones this filter.
*
* Returns:
* {<OpenLayers.Filter.Logical>} Clone of this filter.
*/
clone: function() {
var filters = [];
for(var i=0, len=this.filters.length; i<len; ++i) {
filters.push(this.filters[i].clone());
}
return new OpenLayers.Filter.Logical({
type: this.type,
filters: filters
});
},
CLASS_NAME: "OpenLayers.Filter.Logical"
});
OpenLayers.Filter.Logical.AND = "&&";
OpenLayers.Filter.Logical.OR = "||";
OpenLayers.Filter.Logical.NOT = "!";
/* ======================================================================
OpenLayers/Filter/Comparison.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.Comparison
* This class represents a comparison filter.
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.Comparison = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: type
* {String} type: type of the comparison. This is one of
* - OpenLayers.Filter.Comparison.EQUAL_TO = "==";
* - OpenLayers.Filter.Comparison.NOT_EQUAL_TO = "!=";
* - OpenLayers.Filter.Comparison.LESS_THAN = "<";
* - OpenLayers.Filter.Comparison.GREATER_THAN = ">";
* - OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO = "<=";
* - OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO = ">=";
* - OpenLayers.Filter.Comparison.BETWEEN = "..";
* - OpenLayers.Filter.Comparison.LIKE = "~";
* - OpenLayers.Filter.Comparison.IS_NULL = "NULL";
*/
type: null,
/**
* APIProperty: property
* {String}
* name of the context property to compare
*/
property: null,
/**
* APIProperty: value
* {Number} or {String}
* comparison value for binary comparisons. In the case of a String, this
* can be a combination of text and propertyNames in the form
* "literal ${propertyName}"
*/
value: null,
/**
* Property: matchCase
* {Boolean} Force case sensitive searches for EQUAL_TO and NOT_EQUAL_TO
* comparisons. The Filter Encoding 1.1 specification added a matchCase
* attribute to ogc:PropertyIsEqualTo and ogc:PropertyIsNotEqualTo
* elements. This property will be serialized with those elements only
* if using the v1.1.0 filter format. However, when evaluating filters
* here, the matchCase property will always be respected (for EQUAL_TO
* and NOT_EQUAL_TO). Default is true.
*/
matchCase: true,
/**
* APIProperty: lowerBoundary
* {Number} or {String}
* lower boundary for between comparisons. In the case of a String, this
* can be a combination of text and propertyNames in the form
* "literal ${propertyName}"
*/
lowerBoundary: null,
/**
* APIProperty: upperBoundary
* {Number} or {String}
* upper boundary for between comparisons. In the case of a String, this
* can be a combination of text and propertyNames in the form
* "literal ${propertyName}"
*/
upperBoundary: null,
/**
* Constructor: OpenLayers.Filter.Comparison
* Creates a comparison rule.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* rule
*
* Returns:
* {<OpenLayers.Filter.Comparison>}
*/
initialize: function(options) {
OpenLayers.Filter.prototype.initialize.apply(this, [options]);
// since matchCase on PropertyIsLike is not schema compliant, we only
// want to use this if explicitly asked for
if (this.type === OpenLayers.Filter.Comparison.LIKE
&& options.matchCase === undefined) {
this.matchCase = null;
}
},
/**
* APIMethod: evaluate
* Evaluates this filter in a specific context.
*
* Parameters:
* context - {Object} Context to use in evaluating the filter. If a vector
* feature is provided, the feature.attributes will be used as context.
*
* Returns:
* {Boolean} The filter applies.
*/
evaluate: function(context) {
if (context instanceof OpenLayers.Feature.Vector) {
context = context.attributes;
}
var result = false;
var got = context[this.property];
var exp;
switch(this.type) {
case OpenLayers.Filter.Comparison.EQUAL_TO:
exp = this.value;
if(!this.matchCase &&
typeof got == "string" && typeof exp == "string") {
result = (got.toUpperCase() == exp.toUpperCase());
} else {
result = (got == exp);
}
break;
case OpenLayers.Filter.Comparison.NOT_EQUAL_TO:
exp = this.value;
if(!this.matchCase &&
typeof got == "string" && typeof exp == "string") {
result = (got.toUpperCase() != exp.toUpperCase());
} else {
result = (got != exp);
}
break;
case OpenLayers.Filter.Comparison.LESS_THAN:
result = got < this.value;
break;
case OpenLayers.Filter.Comparison.GREATER_THAN:
result = got > this.value;
break;
case OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO:
result = got <= this.value;
break;
case OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO:
result = got >= this.value;
break;
case OpenLayers.Filter.Comparison.BETWEEN:
result = (got >= this.lowerBoundary) &&
(got <= this.upperBoundary);
break;
case OpenLayers.Filter.Comparison.LIKE:
var regexp = new RegExp(this.value, "gi");
result = regexp.test(got);
break;
case OpenLayers.Filter.Comparison.IS_NULL:
result = (got === null);
break;
}
return result;
},
/**
* APIMethod: value2regex
* Converts the value of this rule into a regular expression string,
* according to the wildcard characters specified. This method has to
* be called after instantiation of this class, if the value is not a
* regular expression already.
*
* Parameters:
* wildCard - {Char} wildcard character in the above value, default
* is "*"
* singleChar - {Char} single-character wildcard in the above value
* default is "."
* escapeChar - {Char} escape character in the above value, default is
* "!"
*
* Returns:
* {String} regular expression string
*/
value2regex: function(wildCard, singleChar, escapeChar) {
if (wildCard == ".") {
throw new Error("'.' is an unsupported wildCard character for " +
"OpenLayers.Filter.Comparison");
}
// set UMN MapServer defaults for unspecified parameters
wildCard = wildCard ? wildCard : "*";
singleChar = singleChar ? singleChar : ".";
escapeChar = escapeChar ? escapeChar : "!";
this.value = this.value.replace(
new RegExp("\\"+escapeChar+"(.|$)", "g"), "\\$1");
this.value = this.value.replace(
new RegExp("\\"+singleChar, "g"), ".");
this.value = this.value.replace(
new RegExp("\\"+wildCard, "g"), ".*");
this.value = this.value.replace(
new RegExp("\\\\.\\*", "g"), "\\"+wildCard);
this.value = this.value.replace(
new RegExp("\\\\\\.", "g"), "\\"+singleChar);
return this.value;
},
/**
* Method: regex2value
* Convert the value of this rule from a regular expression string into an
* ogc literal string using a wildCard of *, a singleChar of ., and an
* escape of !. Leaves the <value> property unmodified.
*
* Returns:
* {String} A string value.
*/
regex2value: function() {
var value = this.value;
// replace ! with !!
value = value.replace(/!/g, "!!");
// replace \. with !. (watching out for \\.)
value = value.replace(/(\\)?\\\./g, function($0, $1) {
return $1 ? $0 : "!.";
});
// replace \* with #* (watching out for \\*)
value = value.replace(/(\\)?\\\*/g, function($0, $1) {
return $1 ? $0 : "!*";
});
// replace \\ with \
value = value.replace(/\\\\/g, "\\");
// convert .* to * (the sequence #.* is not allowed)
value = value.replace(/\.\*/g, "*");
return value;
},
/**
* APIMethod: clone
* Clones this filter.
*
* Returns:
* {<OpenLayers.Filter.Comparison>} Clone of this filter.
*/
clone: function() {
return OpenLayers.Util.extend(new OpenLayers.Filter.Comparison(), this);
},
CLASS_NAME: "OpenLayers.Filter.Comparison"
});
OpenLayers.Filter.Comparison.EQUAL_TO = "==";
OpenLayers.Filter.Comparison.NOT_EQUAL_TO = "!=";
OpenLayers.Filter.Comparison.LESS_THAN = "<";
OpenLayers.Filter.Comparison.GREATER_THAN = ">";
OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO = "<=";
OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO = ">=";
OpenLayers.Filter.Comparison.BETWEEN = "..";
OpenLayers.Filter.Comparison.LIKE = "~";
OpenLayers.Filter.Comparison.IS_NULL = "NULL";
/* ======================================================================
OpenLayers/Format/Filter.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML/VersionedOGC.js
* @requires OpenLayers/Filter/FeatureId.js
* @requires OpenLayers/Filter/Logical.js
* @requires OpenLayers/Filter/Comparison.js
*/
/**
* Class: OpenLayers.Format.Filter
* Read/Write ogc:Filter. Create a new instance with the <OpenLayers.Format.Filter>
* constructor.
*
* Inherits from:
* - <OpenLayers.Format.XML.VersionedOGC>
*/
OpenLayers.Format.Filter = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
/**
* APIProperty: defaultVersion
* {String} Version number to assume if none found. Default is "1.0.0".
*/
defaultVersion: "1.0.0",
/**
* APIMethod: write
* Write an ogc:Filter given a filter object.
*
* Parameters:
* filter - {<OpenLayers.Filter>} An filter.
* options - {Object} Optional configuration object.
*
* Returns:
* {Elment} An ogc:Filter element node.
*/
/**
* APIMethod: read
* Read and Filter doc and return an object representing the Filter.
*
* Parameters:
* data - {String | DOMElement} Data to read.
*
* Returns:
* {<OpenLayers.Filter>} A filter object.
*/
CLASS_NAME: "OpenLayers.Format.Filter"
});
/* ======================================================================
OpenLayers/Format/WFST.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format.js
*/
/**
* Function: OpenLayers.Format.WFST
* Used to create a versioned WFS protocol. Default version is 1.0.0.
*
* Returns:
* {<OpenLayers.Format>} A WFST format of the given version.
*/
OpenLayers.Format.WFST = function(options) {
options = OpenLayers.Util.applyDefaults(
options, OpenLayers.Format.WFST.DEFAULTS
);
var cls = OpenLayers.Format.WFST["v"+options.version.replace(/\./g, "_")];
if(!cls) {
throw "Unsupported WFST version: " + options.version;
}
return new cls(options);
};
/**
* Constant: OpenLayers.Format.WFST.DEFAULTS
* {Object} Default properties for the WFST format.
*/
OpenLayers.Format.WFST.DEFAULTS = {
"version": "1.0.0"
};
/* ======================================================================
OpenLayers/Filter/Spatial.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.Spatial
* This class represents a spatial filter.
* Currently implemented: BBOX, DWithin and Intersects
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.Spatial = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: type
* {String} Type of spatial filter.
*
* The type should be one of:
* - OpenLayers.Filter.Spatial.BBOX
* - OpenLayers.Filter.Spatial.INTERSECTS
* - OpenLayers.Filter.Spatial.DWITHIN
* - OpenLayers.Filter.Spatial.WITHIN
* - OpenLayers.Filter.Spatial.CONTAINS
*/
type: null,
/**
* APIProperty: property
* {String} Name of the context property to compare.
*/
property: null,
/**
* APIProperty: value
* {<OpenLayers.Bounds> || <OpenLayers.Geometry>} The bounds or geometry
* to be used by the filter. Use bounds for BBOX filters and geometry
* for INTERSECTS or DWITHIN filters.
*/
value: null,
/**
* APIProperty: distance
* {Number} The distance to use in a DWithin spatial filter.
*/
distance: null,
/**
* APIProperty: distanceUnits
* {String} The units to use for the distance, e.g. 'm'.
*/
distanceUnits: null,
/**
* Constructor: OpenLayers.Filter.Spatial
* Creates a spatial filter.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* filter.
*
* Returns:
* {<OpenLayers.Filter.Spatial>}
*/
/**
* Method: evaluate
* Evaluates this filter for a specific feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} feature to apply the filter to.
*
* Returns:
* {Boolean} The feature meets filter criteria.
*/
evaluate: function(feature) {
var intersect = false;
switch(this.type) {
case OpenLayers.Filter.Spatial.BBOX:
case OpenLayers.Filter.Spatial.INTERSECTS:
if(feature.geometry) {
var geom = this.value;
if(this.value.CLASS_NAME == "OpenLayers.Bounds") {
geom = this.value.toGeometry();
}
if(feature.geometry.intersects(geom)) {
intersect = true;
}
}
break;
default:
throw new Error('evaluate is not implemented for this filter type.');
}
return intersect;
},
/**
* APIMethod: clone
* Clones this filter.
*
* Returns:
* {<OpenLayers.Filter.Spatial>} Clone of this filter.
*/
clone: function() {
var options = OpenLayers.Util.applyDefaults({
value: this.value && this.value.clone && this.value.clone()
}, this);
return new OpenLayers.Filter.Spatial(options);
},
CLASS_NAME: "OpenLayers.Filter.Spatial"
});
OpenLayers.Filter.Spatial.BBOX = "BBOX";
OpenLayers.Filter.Spatial.INTERSECTS = "INTERSECTS";
OpenLayers.Filter.Spatial.DWITHIN = "DWITHIN";
OpenLayers.Filter.Spatial.WITHIN = "WITHIN";
OpenLayers.Filter.Spatial.CONTAINS = "CONTAINS";
/* ======================================================================
OpenLayers/Format/WFST/v1.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Format/WFST.js
* @requires OpenLayers/Filter/Spatial.js
* @requires OpenLayers/Filter/FeatureId.js
*/
/**
* Class: OpenLayers.Format.WFST.v1
* Superclass for WFST parsers.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.WFST.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
xlink: "http://www.w3.org/1999/xlink",
xsi: "http://www.w3.org/2001/XMLSchema-instance",
wfs: "http://www.opengis.net/wfs",
gml: "http://www.opengis.net/gml",
ogc: "http://www.opengis.net/ogc",
ows: "http://www.opengis.net/ows"
},
/**
* Property: defaultPrefix
*/
defaultPrefix: "wfs",
/**
* Property: version
* {String} WFS version number.
*/
version: null,
/**
* Property: schemaLocation
* {String} Schema location for a particular minor version.
*/
schemaLocations: null,
/**
* APIProperty: srsName
* {String} URI for spatial reference system.
*/
srsName: null,
/**
* APIProperty: extractAttributes
* {Boolean} Extract attributes from GML. Default is true.
*/
extractAttributes: true,
/**
* APIProperty: xy
* {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
* Changing is not recommended, a new Format should be instantiated.
*/
xy: true,
/**
* Property: stateName
* {Object} Maps feature states to node names.
*/
stateName: null,
/**
* Constructor: OpenLayers.Format.WFST.v1
* Instances of this class are not created directly. Use the
* <OpenLayers.Format.WFST.v1_0_0> or <OpenLayers.Format.WFST.v1_1_0>
* constructor instead.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
// set state name mapping
this.stateName = {};
this.stateName[OpenLayers.State.INSERT] = "wfs:Insert";
this.stateName[OpenLayers.State.UPDATE] = "wfs:Update";
this.stateName[OpenLayers.State.DELETE] = "wfs:Delete";
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
},
/**
* Method: getSrsName
*/
getSrsName: function(feature, options) {
var srsName = options && options.srsName;
if(!srsName) {
if(feature && feature.layer) {
srsName = feature.layer.projection.getCode();
} else {
srsName = this.srsName;
}
}
return srsName;
},
/**
* APIMethod: read
* Parse the response from a transaction. Because WFS is split into
* Transaction requests (create, update, and delete) and GetFeature
* requests (read), this method handles parsing of both types of
* responses.
*
* Parameters:
* data - {String | Document} The WFST document to read
* options - {Object} Options for the reader
*
* Valid options properties:
* output - {String} either "features" or "object". The default is
* "features", which means that the method will return an array of
* features. If set to "object", an object with a "features" property
* and other properties read by the parser will be returned.
*
* Returns:
* {Array | Object} Output depending on the output option.
*/
read: function(data, options) {
options = options || {};
OpenLayers.Util.applyDefaults(options, {
output: "features"
});
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
if(data && data.nodeType == 9) {
data = data.documentElement;
}
var obj = {};
if(data) {
this.readNode(data, obj, true);
}
if(obj.features && options.output === "features") {
obj = obj.features;
}
return obj;
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"wfs": {
"FeatureCollection": function(node, obj) {
obj.features = [];
this.readChildNodes(node, obj);
}
}
},
/**
* Method: write
* Given an array of features, write a WFS transaction. This assumes
* the features have a state property that determines the operation
* type - insert, update, or delete.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)} A list of features. See
* below for a more detailed description of the influence of the
* feature's *modified* property.
* options - {Object}
*
* feature.modified rules:
* If a feature has a modified property set, the following checks will be
* made before a feature's geometry or attribute is included in an Update
* transaction:
* - *modified* is not set at all: The geometry and all attributes will be
* included.
* - *modified.geometry* is set (null or a geometry): The geometry will be
* included. If *modified.attributes* is not set, all attributes will
* be included.
* - *modified.attributes* is set: Only the attributes set (i.e. to null or
* a value) in *modified.attributes* will be included.
* If *modified.geometry* is not set, the geometry will not be included.
*
* Valid options include:
* - *multi* {Boolean} If set to true, geometries will be casted to
* Multi geometries before writing.
*
* Returns:
* {String} A serialized WFS transaction.
*/
write: function(features, options) {
var node = this.writeNode("wfs:Transaction", {
features:features,
options: options
});
var value = this.schemaLocationAttr();
if(value) {
this.setAttributeNS(
node, this.namespaces["xsi"], "xsi:schemaLocation", value
);
}
return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"wfs": {
"GetFeature": function(options) {
var node = this.createElementNSPlus("wfs:GetFeature", {
attributes: {
service: "WFS",
version: this.version,
handle: options && options.handle,
outputFormat: options && options.outputFormat,
maxFeatures: options && options.maxFeatures,
"xsi:schemaLocation": this.schemaLocationAttr(options)
}
});
if (typeof this.featureType == "string") {
this.writeNode("Query", options, node);
} else {
for (var i=0,len = this.featureType.length; i<len; i++) {
options.featureType = this.featureType[i];
this.writeNode("Query", options, node);
}
}
return node;
},
"Transaction": function(obj) {
obj = obj || {};
var options = obj.options || {};
var node = this.createElementNSPlus("wfs:Transaction", {
attributes: {
service: "WFS",
version: this.version,
handle: options.handle
}
});
var i, len;
var features = obj.features;
if(features) {
// temporarily re-assigning geometry types
if (options.multi === true) {
OpenLayers.Util.extend(this.geometryTypes, {
"OpenLayers.Geometry.Point": "MultiPoint",
"OpenLayers.Geometry.LineString": (this.multiCurve === true) ? "MultiCurve": "MultiLineString",
"OpenLayers.Geometry.Polygon": (this.multiSurface === true) ? "MultiSurface" : "MultiPolygon"
});
}
var name, feature;
for(i=0, len=features.length; i<len; ++i) {
feature = features[i];
name = this.stateName[feature.state];
if(name) {
this.writeNode(name, {
feature: feature,
options: options
}, node);
}
}
// switch back to original geometry types assignment
if (options.multi === true) {
this.setGeometryTypes();
}
}
if (options.nativeElements) {
for (i=0, len=options.nativeElements.length; i<len; ++i) {
this.writeNode("wfs:Native",
options.nativeElements[i], node);
}
}
return node;
},
"Native": function(nativeElement) {
var node = this.createElementNSPlus("wfs:Native", {
attributes: {
vendorId: nativeElement.vendorId,
safeToIgnore: nativeElement.safeToIgnore
},
value: nativeElement.value
});
return node;
},
"Insert": function(obj) {
var feature = obj.feature;
var options = obj.options;
var node = this.createElementNSPlus("wfs:Insert", {
attributes: {
handle: options && options.handle
}
});
this.srsName = this.getSrsName(feature);
this.writeNode("feature:_typeName", feature, node);
return node;
},
"Update": function(obj) {
var feature = obj.feature;
var options = obj.options;
var node = this.createElementNSPlus("wfs:Update", {
attributes: {
handle: options && options.handle,
typeName: (this.featureNS ? this.featurePrefix + ":" : "") +
this.featureType
}
});
if(this.featureNS) {
node.setAttribute("xmlns:" + this.featurePrefix, this.featureNS);
}
// add in geometry
var modified = feature.modified;
if (this.geometryName !== null && (!modified || modified.geometry !== undefined)) {
this.srsName = this.getSrsName(feature);
this.writeNode(
"Property", {name: this.geometryName, value: feature.geometry}, node
);
}
// add in attributes
for(var key in feature.attributes) {
if(feature.attributes[key] !== undefined &&
(!modified || !modified.attributes ||
(modified.attributes && modified.attributes[key] !== undefined))) {
this.writeNode(
"Property", {name: key, value: feature.attributes[key]}, node
);
}
}
// add feature id filter
this.writeNode("ogc:Filter", new OpenLayers.Filter.FeatureId({
fids: [feature.fid]
}), node);
return node;
},
"Property": function(obj) {
var node = this.createElementNSPlus("wfs:Property");
this.writeNode("Name", obj.name, node);
if(obj.value !== null) {
this.writeNode("Value", obj.value, node);
}
return node;
},
"Name": function(name) {
return this.createElementNSPlus("wfs:Name", {value: name});
},
"Value": function(obj) {
var node;
if(obj instanceof OpenLayers.Geometry) {
node = this.createElementNSPlus("wfs:Value");
var geom = this.writeNode("feature:_geometry", obj).firstChild;
node.appendChild(geom);
} else {
node = this.createElementNSPlus("wfs:Value", {value: obj});
}
return node;
},
"Delete": function(obj) {
var feature = obj.feature;
var options = obj.options;
var node = this.createElementNSPlus("wfs:Delete", {
attributes: {
handle: options && options.handle,
typeName: (this.featureNS ? this.featurePrefix + ":" : "") +
this.featureType
}
});
if(this.featureNS) {
node.setAttribute("xmlns:" + this.featurePrefix, this.featureNS);
}
this.writeNode("ogc:Filter", new OpenLayers.Filter.FeatureId({
fids: [feature.fid]
}), node);
return node;
}
}
},
/**
* Method: schemaLocationAttr
* Generate the xsi:schemaLocation attribute value.
*
* Returns:
* {String} The xsi:schemaLocation attribute or undefined if none.
*/
schemaLocationAttr: function(options) {
options = OpenLayers.Util.extend({
featurePrefix: this.featurePrefix,
schema: this.schema
}, options);
var schemaLocations = OpenLayers.Util.extend({}, this.schemaLocations);
if(options.schema) {
schemaLocations[options.featurePrefix] = options.schema;
}
var parts = [];
var uri;
for(var key in schemaLocations) {
uri = this.namespaces[key];
if(uri) {
parts.push(uri + " " + schemaLocations[key]);
}
}
var value = parts.join(" ") || undefined;
return value;
},
/**
* Method: setFilterProperty
* Set the property of each spatial filter.
*
* Parameters:
* filter - {<OpenLayers.Filter>}
*/
setFilterProperty: function(filter) {
if(filter.filters) {
for(var i=0, len=filter.filters.length; i<len; ++i) {
OpenLayers.Format.WFST.v1.prototype.setFilterProperty.call(this, filter.filters[i]);
}
} else {
if(filter instanceof OpenLayers.Filter.Spatial && !filter.property) {
// got a spatial filter without property, so set it
filter.property = this.geometryName;
}
}
},
CLASS_NAME: "OpenLayers.Format.WFST.v1"
});
/* ======================================================================
OpenLayers/Geometry/Polygon.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/Collection.js
* @requires OpenLayers/Geometry/LinearRing.js
*/
/**
* Class: OpenLayers.Geometry.Polygon
* Polygon is a collection of Geometry.LinearRings.
*
* Inherits from:
* - <OpenLayers.Geometry.Collection>
* - <OpenLayers.Geometry>
*/
OpenLayers.Geometry.Polygon = OpenLayers.Class(
OpenLayers.Geometry.Collection, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null value means the
* component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.LinearRing"],
/**
* Constructor: OpenLayers.Geometry.Polygon
* Constructor for a Polygon geometry.
* The first ring (this.component[0])is the outer bounds of the polygon and
* all subsequent rings (this.component[1-n]) are internal holes.
*
*
* Parameters:
* components - {Array(<OpenLayers.Geometry.LinearRing>)}
*/
/**
* APIMethod: getArea
* Calculated by subtracting the areas of the internal holes from the
* area of the outer hole.
*
* Returns:
* {float} The area of the geometry
*/
getArea: function() {
var area = 0.0;
if ( this.components && (this.components.length > 0)) {
area += Math.abs(this.components[0].getArea());
for (var i=1, len=this.components.length; i<len; i++) {
area -= Math.abs(this.components[i].getArea());
}
}
return area;
},
/**
* APIMethod: getGeodesicArea
* Calculate the approximate area of the polygon were it projected onto
* the earth.
*
* Parameters:
* projection - {<OpenLayers.Projection>} The spatial reference system
* for the geometry coordinates. If not provided, Geographic/WGS84 is
* assumed.
*
* Reference:
* Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
* Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
* Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
*
* Returns:
* {float} The approximate geodesic area of the polygon in square meters.
*/
getGeodesicArea: function(projection) {
var area = 0.0;
if(this.components && (this.components.length > 0)) {
area += Math.abs(this.components[0].getGeodesicArea(projection));
for(var i=1, len=this.components.length; i<len; i++) {
area -= Math.abs(this.components[i].getGeodesicArea(projection));
}
}
return area;
},
/**
* Method: containsPoint
* Test if a point is inside a polygon. Points on a polygon edge are
* considered inside.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns:
* {Boolean | Number} The point is inside the polygon. Returns 1 if the
* point is on an edge. Returns boolean otherwise.
*/
containsPoint: function(point) {
var numRings = this.components.length;
var contained = false;
if(numRings > 0) {
// check exterior ring - 1 means on edge, boolean otherwise
contained = this.components[0].containsPoint(point);
if(contained !== 1) {
if(contained && numRings > 1) {
// check interior rings
var hole;
for(var i=1; i<numRings; ++i) {
hole = this.components[i].containsPoint(point);
if(hole) {
if(hole === 1) {
// on edge
contained = 1;
} else {
// in hole
contained = false;
}
break;
}
}
}
}
}
return contained;
},
/**
* APIMethod: intersects
* Determine if the input geometry intersects this one.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} Any type of geometry.
*
* Returns:
* {Boolean} The input geometry intersects this one.
*/
intersects: function(geometry) {
var intersect = false;
var i, len;
if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
intersect = this.containsPoint(geometry);
} else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LineString" ||
geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
// check if rings/linestrings intersect
for(i=0, len=this.components.length; i<len; ++i) {
intersect = geometry.intersects(this.components[i]);
if(intersect) {
break;
}
}
if(!intersect) {
// check if this poly contains points of the ring/linestring
for(i=0, len=geometry.components.length; i<len; ++i) {
intersect = this.containsPoint(geometry.components[i]);
if(intersect) {
break;
}
}
}
} else {
for(i=0, len=geometry.components.length; i<len; ++ i) {
intersect = this.intersects(geometry.components[i]);
if(intersect) {
break;
}
}
}
// check case where this poly is wholly contained by another
if(!intersect && geometry.CLASS_NAME == "OpenLayers.Geometry.Polygon") {
// exterior ring points will be contained in the other geometry
var ring = this.components[0];
for(i=0, len=ring.components.length; i<len; ++i) {
intersect = geometry.containsPoint(ring.components[i]);
if(intersect) {
break;
}
}
}
return intersect;
},
/**
* APIMethod: distanceTo
* Calculate the closest distance between two geometries (on the x-y plane).
*
* Parameters:
* geometry - {<OpenLayers.Geometry>} The target geometry.
* options - {Object} Optional properties for configuring the distance
* calculation.
*
* Valid options:
* details - {Boolean} Return details from the distance calculation.
* Default is false.
* edge - {Boolean} Calculate the distance from this geometry to the
* nearest edge of the target geometry. Default is true. If true,
* calling distanceTo from a geometry that is wholly contained within
* the target will result in a non-zero distance. If false, whenever
* geometries intersect, calling distanceTo will return 0. If false,
* details cannot be returned.
*
* Returns:
* {Number | Object} The distance between this geometry and the target.
* If details is true, the return will be an object with distance,
* x0, y0, x1, and y1 properties. The x0 and y0 properties represent
* the coordinates of the closest point on this geometry. The x1 and y1
* properties represent the coordinates of the closest point on the
* target geometry.
*/
distanceTo: function(geometry, options) {
var edge = !(options && options.edge === false);
var result;
// this is the case where we might not be looking for distance to edge
if(!edge && this.intersects(geometry)) {
result = 0;
} else {
result = OpenLayers.Geometry.Collection.prototype.distanceTo.apply(
this, [geometry, options]
);
}
return result;
},
CLASS_NAME: "OpenLayers.Geometry.Polygon"
});
/**
* APIMethod: createRegularPolygon
* Create a regular polygon around a radius. Useful for creating circles
* and the like.
*
* Parameters:
* origin - {<OpenLayers.Geometry.Point>} center of polygon.
* radius - {Float} distance to vertex, in map units.
* sides - {Integer} Number of sides. 20 approximates a circle.
* rotation - {Float} original angle of rotation, in degrees.
*/
OpenLayers.Geometry.Polygon.createRegularPolygon = function(origin, radius, sides, rotation) {
var angle = Math.PI * ((1/sides) - (1/2));
if(rotation) {
angle += (rotation / 180) * Math.PI;
}
var rotatedAngle, x, y;
var points = [];
for(var i=0; i<sides; ++i) {
rotatedAngle = angle + (i * 2 * Math.PI / sides);
x = origin.x + (radius * Math.cos(rotatedAngle));
y = origin.y + (radius * Math.sin(rotatedAngle));
points.push(new OpenLayers.Geometry.Point(x, y));
}
var ring = new OpenLayers.Geometry.LinearRing(points);
return new OpenLayers.Geometry.Polygon([ring]);
};
/* ======================================================================
OpenLayers/Geometry/MultiPolygon.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Geometry/Collection.js
* @requires OpenLayers/Geometry/Polygon.js
*/
/**
* Class: OpenLayers.Geometry.MultiPolygon
* MultiPolygon is a geometry with multiple <OpenLayers.Geometry.Polygon>
* components. Create a new instance with the <OpenLayers.Geometry.MultiPolygon>
* constructor.
*
* Inherits from:
* - <OpenLayers.Geometry.Collection>
*/
OpenLayers.Geometry.MultiPolygon = OpenLayers.Class(
OpenLayers.Geometry.Collection, {
/**
* Property: componentTypes
* {Array(String)} An array of class names representing the types of
* components that the collection can include. A null value means the
* component types are not restricted.
*/
componentTypes: ["OpenLayers.Geometry.Polygon"],
/**
* Constructor: OpenLayers.Geometry.MultiPolygon
* Create a new MultiPolygon geometry
*
* Parameters:
* components - {Array(<OpenLayers.Geometry.Polygon>)} An array of polygons
* used to generate the MultiPolygon
*
*/
CLASS_NAME: "OpenLayers.Geometry.MultiPolygon"
});
/* ======================================================================
OpenLayers/Format/GML.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Geometry/Point.js
* @requires OpenLayers/Geometry/MultiPoint.js
* @requires OpenLayers/Geometry/LineString.js
* @requires OpenLayers/Geometry/MultiLineString.js
* @requires OpenLayers/Geometry/Polygon.js
* @requires OpenLayers/Geometry/MultiPolygon.js
*/
/**
* Class: OpenLayers.Format.GML
* Read/Write GML. Create a new instance with the <OpenLayers.Format.GML>
* constructor. Supports the GML simple features profile.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.GML = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* APIProperty: featureNS
* {String} Namespace used for feature attributes. Default is
* "http://mapserver.gis.umn.edu/mapserver".
*/
featureNS: "http://mapserver.gis.umn.edu/mapserver",
/**
* APIProperty: featurePrefix
* {String} Namespace alias (or prefix) for feature nodes. Default is
* "feature".
*/
featurePrefix: "feature",
/**
* APIProperty: featureName
* {String} Element name for features. Default is "featureMember".
*/
featureName: "featureMember",
/**
* APIProperty: layerName
* {String} Name of data layer. Default is "features".
*/
layerName: "features",
/**
* APIProperty: geometryName
* {String} Name of geometry element. Defaults to "geometry".
*/
geometryName: "geometry",
/**
* APIProperty: collectionName
* {String} Name of featureCollection element.
*/
collectionName: "FeatureCollection",
/**
* APIProperty: gmlns
* {String} GML Namespace.
*/
gmlns: "http://www.opengis.net/gml",
/**
* APIProperty: extractAttributes
* {Boolean} Extract attributes from GML.
*/
extractAttributes: true,
/**
* APIProperty: xy
* {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
* Changing is not recommended, a new Format should be instantiated.
*/
xy: true,
/**
* Constructor: OpenLayers.Format.GML
* Create a new parser for GML.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
// compile regular expressions once instead of every time they are used
this.regExes = {
trimSpace: (/^\s*|\s*$/g),
removeSpace: (/\s*/g),
splitSpace: (/\s+/),
trimComma: (/\s*,\s*/g)
};
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
},
/**
* APIMethod: read
* Read data from a string, and return a list of features.
*
* Parameters:
* data - {String} or {DOMElement} data to read/parse.
*
* Returns:
* {Array(<OpenLayers.Feature.Vector>)} An array of features.
*/
read: function(data) {
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
var featureNodes = this.getElementsByTagNameNS(data.documentElement,
this.gmlns,
this.featureName);
var features = [];
for(var i=0; i<featureNodes.length; i++) {
var feature = this.parseFeature(featureNodes[i]);
if(feature) {
features.push(feature);
}
}
return features;
},
/**
* Method: parseFeature
* This function is the core of the GML parsing code in OpenLayers.
* It creates the geometries that are then attached to the returned
* feature, and calls parseAttributes() to get attribute data out.
*
* Parameters:
* node - {DOMElement} A GML feature node.
*/
parseFeature: function(node) {
// only accept one geometry per feature - look for highest "order"
var order = ["MultiPolygon", "Polygon",
"MultiLineString", "LineString",
"MultiPoint", "Point", "Envelope"];
// FIXME: In case we parse a feature with no geometry, but boundedBy an Envelope,
// this code creates a geometry derived from the Envelope. This is not correct.
var type, nodeList, geometry, parser;
for(var i=0; i<order.length; ++i) {
type = order[i];
nodeList = this.getElementsByTagNameNS(node, this.gmlns, type);
if(nodeList.length > 0) {
// only deal with first geometry of this type
parser = this.parseGeometry[type.toLowerCase()];
if(parser) {
geometry = parser.apply(this, [nodeList[0]]);
if (this.internalProjection && this.externalProjection) {
geometry.transform(this.externalProjection,
this.internalProjection);
}
} else {
throw new TypeError("Unsupported geometry type: " + type);
}
// stop looking for different geometry types
break;
}
}
var bounds;
var boxNodes = this.getElementsByTagNameNS(node, this.gmlns, "Box");
for(i=0; i<boxNodes.length; ++i) {
var boxNode = boxNodes[i];
var box = this.parseGeometry["box"].apply(this, [boxNode]);
var parentNode = boxNode.parentNode;
var parentName = parentNode.localName ||
parentNode.nodeName.split(":").pop();
if(parentName === "boundedBy") {
bounds = box;
} else {
geometry = box.toGeometry();
}
}
// construct feature (optionally with attributes)
var attributes;
if(this.extractAttributes) {
attributes = this.parseAttributes(node);
}
var feature = new OpenLayers.Feature.Vector(geometry, attributes);
feature.bounds = bounds;
feature.gml = {
featureType: node.firstChild.nodeName.split(":")[1],
featureNS: node.firstChild.namespaceURI,
featureNSPrefix: node.firstChild.prefix
};
// assign fid - this can come from a "fid" or "id" attribute
var childNode = node.firstChild;
var fid;
while(childNode) {
if(childNode.nodeType == 1) {
fid = childNode.getAttribute("fid") ||
childNode.getAttribute("id");
if(fid) {
break;
}
}
childNode = childNode.nextSibling;
}
feature.fid = fid;
return feature;
},
/**
* Property: parseGeometry
* Properties of this object are the functions that parse geometries based
* on their type.
*/
parseGeometry: {
/**
* Method: parseGeometry.point
* Given a GML node representing a point geometry, create an OpenLayers
* point geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.Point>} A point geometry.
*/
point: function(node) {
/**
* Three coordinate variations to consider:
* 1) <gml:pos>x y z</gml:pos>
* 2) <gml:coordinates>x, y, z</gml:coordinates>
* 3) <gml:coord><gml:X>x</gml:X><gml:Y>y</gml:Y></gml:coord>
*/
var nodeList, coordString;
var coords = [];
// look for <gml:pos>
var nodeList = this.getElementsByTagNameNS(node, this.gmlns, "pos");
if(nodeList.length > 0) {
coordString = nodeList[0].firstChild.nodeValue;
coordString = coordString.replace(this.regExes.trimSpace, "");
coords = coordString.split(this.regExes.splitSpace);
}
// look for <gml:coordinates>
if(coords.length == 0) {
nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"coordinates");
if(nodeList.length > 0) {
coordString = nodeList[0].firstChild.nodeValue;
coordString = coordString.replace(this.regExes.removeSpace,
"");
coords = coordString.split(",");
}
}
// look for <gml:coord>
if(coords.length == 0) {
nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"coord");
if(nodeList.length > 0) {
var xList = this.getElementsByTagNameNS(nodeList[0],
this.gmlns, "X");
var yList = this.getElementsByTagNameNS(nodeList[0],
this.gmlns, "Y");
if(xList.length > 0 && yList.length > 0) {
coords = [xList[0].firstChild.nodeValue,
yList[0].firstChild.nodeValue];
}
}
}
// preserve third dimension
if(coords.length == 2) {
coords[2] = null;
}
if (this.xy) {
return new OpenLayers.Geometry.Point(coords[0], coords[1],
coords[2]);
}
else{
return new OpenLayers.Geometry.Point(coords[1], coords[0],
coords[2]);
}
},
/**
* Method: parseGeometry.multipoint
* Given a GML node representing a multipoint geometry, create an
* OpenLayers multipoint geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry.
*/
multipoint: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"Point");
var components = [];
if(nodeList.length > 0) {
var point;
for(var i=0; i<nodeList.length; ++i) {
point = this.parseGeometry.point.apply(this, [nodeList[i]]);
if(point) {
components.push(point);
}
}
}
return new OpenLayers.Geometry.MultiPoint(components);
},
/**
* Method: parseGeometry.linestring
* Given a GML node representing a linestring geometry, create an
* OpenLayers linestring geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.LineString>} A linestring geometry.
*/
linestring: function(node, ring) {
/**
* Two coordinate variations to consider:
* 1) <gml:posList dimension="d">x0 y0 z0 x1 y1 z1</gml:posList>
* 2) <gml:coordinates>x0, y0, z0 x1, y1, z1</gml:coordinates>
*/
var nodeList, coordString;
var coords = [];
var points = [];
// look for <gml:posList>
nodeList = this.getElementsByTagNameNS(node, this.gmlns, "posList");
if(nodeList.length > 0) {
coordString = this.getChildValue(nodeList[0]);
coordString = coordString.replace(this.regExes.trimSpace, "");
coords = coordString.split(this.regExes.splitSpace);
var dim = parseInt(nodeList[0].getAttribute("dimension"));
var j, x, y, z;
for(var i=0; i<coords.length/dim; ++i) {
j = i * dim;
x = coords[j];
y = coords[j+1];
z = (dim == 2) ? null : coords[j+2];
if (this.xy) {
points.push(new OpenLayers.Geometry.Point(x, y, z));
} else {
points.push(new OpenLayers.Geometry.Point(y, x, z));
}
}
}
// look for <gml:coordinates>
if(coords.length == 0) {
nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"coordinates");
if(nodeList.length > 0) {
coordString = this.getChildValue(nodeList[0]);
coordString = coordString.replace(this.regExes.trimSpace,
"");
coordString = coordString.replace(this.regExes.trimComma,
",");
var pointList = coordString.split(this.regExes.splitSpace);
for(var i=0; i<pointList.length; ++i) {
coords = pointList[i].split(",");
if(coords.length == 2) {
coords[2] = null;
}
if (this.xy) {
points.push(new OpenLayers.Geometry.Point(coords[0],
coords[1],
coords[2]));
} else {
points.push(new OpenLayers.Geometry.Point(coords[1],
coords[0],
coords[2]));
}
}
}
}
var line = null;
if(points.length != 0) {
if(ring) {
line = new OpenLayers.Geometry.LinearRing(points);
} else {
line = new OpenLayers.Geometry.LineString(points);
}
}
return line;
},
/**
* Method: parseGeometry.multilinestring
* Given a GML node representing a multilinestring geometry, create an
* OpenLayers multilinestring geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.MultiLineString>} A multilinestring geometry.
*/
multilinestring: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"LineString");
var components = [];
if(nodeList.length > 0) {
var line;
for(var i=0; i<nodeList.length; ++i) {
line = this.parseGeometry.linestring.apply(this,
[nodeList[i]]);
if(line) {
components.push(line);
}
}
}
return new OpenLayers.Geometry.MultiLineString(components);
},
/**
* Method: parseGeometry.polygon
* Given a GML node representing a polygon geometry, create an
* OpenLayers polygon geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.Polygon>} A polygon geometry.
*/
polygon: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"LinearRing");
var components = [];
if(nodeList.length > 0) {
// this assumes exterior ring first, inner rings after
var ring;
for(var i=0; i<nodeList.length; ++i) {
ring = this.parseGeometry.linestring.apply(this,
[nodeList[i], true]);
if(ring) {
components.push(ring);
}
}
}
return new OpenLayers.Geometry.Polygon(components);
},
/**
* Method: parseGeometry.multipolygon
* Given a GML node representing a multipolygon geometry, create an
* OpenLayers multipolygon geometry.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Geometry.MultiPolygon>} A multipolygon geometry.
*/
multipolygon: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"Polygon");
var components = [];
if(nodeList.length > 0) {
var polygon;
for(var i=0; i<nodeList.length; ++i) {
polygon = this.parseGeometry.polygon.apply(this,
[nodeList[i]]);
if(polygon) {
components.push(polygon);
}
}
}
return new OpenLayers.Geometry.MultiPolygon(components);
},
envelope: function(node) {
var components = [];
var coordString;
var envelope;
var lpoint = this.getElementsByTagNameNS(node, this.gmlns, "lowerCorner");
if (lpoint.length > 0) {
var coords = [];
if(lpoint.length > 0) {
coordString = lpoint[0].firstChild.nodeValue;
coordString = coordString.replace(this.regExes.trimSpace, "");
coords = coordString.split(this.regExes.splitSpace);
}
if(coords.length == 2) {
coords[2] = null;
}
if (this.xy) {
var lowerPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]);
} else {
var lowerPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]);
}
}
var upoint = this.getElementsByTagNameNS(node, this.gmlns, "upperCorner");
if (upoint.length > 0) {
var coords = [];
if(upoint.length > 0) {
coordString = upoint[0].firstChild.nodeValue;
coordString = coordString.replace(this.regExes.trimSpace, "");
coords = coordString.split(this.regExes.splitSpace);
}
if(coords.length == 2) {
coords[2] = null;
}
if (this.xy) {
var upperPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]);
} else {
var upperPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]);
}
}
if (lowerPoint && upperPoint) {
components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y));
components.push(new OpenLayers.Geometry.Point(upperPoint.x, lowerPoint.y));
components.push(new OpenLayers.Geometry.Point(upperPoint.x, upperPoint.y));
components.push(new OpenLayers.Geometry.Point(lowerPoint.x, upperPoint.y));
components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y));
var ring = new OpenLayers.Geometry.LinearRing(components);
envelope = new OpenLayers.Geometry.Polygon([ring]);
}
return envelope;
},
/**
* Method: parseGeometry.box
* Given a GML node representing a box geometry, create an
* OpenLayers.Bounds.
*
* Parameters:
* node - {DOMElement} A GML node.
*
* Returns:
* {<OpenLayers.Bounds>} A bounds representing the box.
*/
box: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
"coordinates");
var coordString;
var coords, beginPoint = null, endPoint = null;
if (nodeList.length > 0) {
coordString = nodeList[0].firstChild.nodeValue;
coords = coordString.split(" ");
if (coords.length == 2) {
beginPoint = coords[0].split(",");
endPoint = coords[1].split(",");
}
}
if (beginPoint !== null && endPoint !== null) {
return new OpenLayers.Bounds(parseFloat(beginPoint[0]),
parseFloat(beginPoint[1]),
parseFloat(endPoint[0]),
parseFloat(endPoint[1]) );
}
}
},
/**
* Method: parseAttributes
*
* Parameters:
* node - {DOMElement}
*
* Returns:
* {Object} An attributes object.
*/
parseAttributes: function(node) {
var attributes = {};
// assume attributes are children of the first type 1 child
var childNode = node.firstChild;
var children, i, child, grandchildren, grandchild, name, value;
while(childNode) {
if(childNode.nodeType == 1) {
// attributes are type 1 children with one type 3 child
children = childNode.childNodes;
for(i=0; i<children.length; ++i) {
child = children[i];
if(child.nodeType == 1) {
grandchildren = child.childNodes;
if(grandchildren.length == 1) {
grandchild = grandchildren[0];
if(grandchild.nodeType == 3 ||
grandchild.nodeType == 4) {
name = (child.prefix) ?
child.nodeName.split(":")[1] :
child.nodeName;
value = grandchild.nodeValue.replace(
this.regExes.trimSpace, "");
attributes[name] = value;
}
} else {
// If child has no childNodes (grandchildren),
// set an attribute with null value.
// e.g. <prefix:fieldname/> becomes
// {fieldname: null}
attributes[child.nodeName.split(":").pop()] = null;
}
}
}
break;
}
childNode = childNode.nextSibling;
}
return attributes;
},
/**
* APIMethod: write
* Generate a GML document string given a list of features.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)} List of features to
* serialize into a string.
*
* Returns:
* {String} A string representing the GML document.
*/
write: function(features) {
if(!(OpenLayers.Util.isArray(features))) {
features = [features];
}
var gml = this.createElementNS("http://www.opengis.net/wfs",
"wfs:" + this.collectionName);
for(var i=0; i<features.length; i++) {
gml.appendChild(this.createFeatureXML(features[i]));
}
return OpenLayers.Format.XML.prototype.write.apply(this, [gml]);
},
/**
* Method: createFeatureXML
* Accept an OpenLayers.Feature.Vector, and build a GML node for it.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} The feature to be built as GML.
*
* Returns:
* {DOMElement} A node reprensting the feature in GML.
*/
createFeatureXML: function(feature) {
var geometry = feature.geometry;
var geometryNode = this.buildGeometryNode(geometry);
var geomContainer = this.createElementNS(this.featureNS,
this.featurePrefix + ":" +
this.geometryName);
geomContainer.appendChild(geometryNode);
var featureNode = this.createElementNS(this.gmlns,
"gml:" + this.featureName);
var featureContainer = this.createElementNS(this.featureNS,
this.featurePrefix + ":" +
this.layerName);
var fid = feature.fid || feature.id;
featureContainer.setAttribute("fid", fid);
featureContainer.appendChild(geomContainer);
for(var attr in feature.attributes) {
var attrText = this.createTextNode(feature.attributes[attr]);
var nodename = attr.substring(attr.lastIndexOf(":") + 1);
var attrContainer = this.createElementNS(this.featureNS,
this.featurePrefix + ":" +
nodename);
attrContainer.appendChild(attrText);
featureContainer.appendChild(attrContainer);
}
featureNode.appendChild(featureContainer);
return featureNode;
},
/**
* APIMethod: buildGeometryNode
*/
buildGeometryNode: function(geometry) {
if (this.externalProjection && this.internalProjection) {
geometry = geometry.clone();
geometry.transform(this.internalProjection,
this.externalProjection);
}
var className = geometry.CLASS_NAME;
var type = className.substring(className.lastIndexOf(".") + 1);
var builder = this.buildGeometry[type.toLowerCase()];
return builder.apply(this, [geometry]);
},
/**
* Property: buildGeometry
* Object containing methods to do the actual geometry node building
* based on geometry type.
*/
buildGeometry: {
// TBD retrieve the srs from layer
// srsName is non-standard, so not including it until it's right.
// gml.setAttribute("srsName",
// "http://www.opengis.net/gml/srs/epsg.xml#4326");
/**
* Method: buildGeometry.point
* Given an OpenLayers point geometry, create a GML point.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Point>} A point geometry.
*
* Returns:
* {DOMElement} A GML point node.
*/
point: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:Point");
gml.appendChild(this.buildCoordinatesNode(geometry));
return gml;
},
/**
* Method: buildGeometry.multipoint
* Given an OpenLayers multipoint geometry, create a GML multipoint.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry.
*
* Returns:
* {DOMElement} A GML multipoint node.
*/
multipoint: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:MultiPoint");
var points = geometry.components;
var pointMember, pointGeom;
for(var i=0; i<points.length; i++) {
pointMember = this.createElementNS(this.gmlns,
"gml:pointMember");
pointGeom = this.buildGeometry.point.apply(this,
[points[i]]);
pointMember.appendChild(pointGeom);
gml.appendChild(pointMember);
}
return gml;
},
/**
* Method: buildGeometry.linestring
* Given an OpenLayers linestring geometry, create a GML linestring.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.LineString>} A linestring geometry.
*
* Returns:
* {DOMElement} A GML linestring node.
*/
linestring: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:LineString");
gml.appendChild(this.buildCoordinatesNode(geometry));
return gml;
},
/**
* Method: buildGeometry.multilinestring
* Given an OpenLayers multilinestring geometry, create a GML
* multilinestring.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.MultiLineString>} A multilinestring
* geometry.
*
* Returns:
* {DOMElement} A GML multilinestring node.
*/
multilinestring: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:MultiLineString");
var lines = geometry.components;
var lineMember, lineGeom;
for(var i=0; i<lines.length; ++i) {
lineMember = this.createElementNS(this.gmlns,
"gml:lineStringMember");
lineGeom = this.buildGeometry.linestring.apply(this,
[lines[i]]);
lineMember.appendChild(lineGeom);
gml.appendChild(lineMember);
}
return gml;
},
/**
* Method: buildGeometry.linearring
* Given an OpenLayers linearring geometry, create a GML linearring.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.LinearRing>} A linearring geometry.
*
* Returns:
* {DOMElement} A GML linearring node.
*/
linearring: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:LinearRing");
gml.appendChild(this.buildCoordinatesNode(geometry));
return gml;
},
/**
* Method: buildGeometry.polygon
* Given an OpenLayers polygon geometry, create a GML polygon.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Polygon>} A polygon geometry.
*
* Returns:
* {DOMElement} A GML polygon node.
*/
polygon: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:Polygon");
var rings = geometry.components;
var ringMember, ringGeom, type;
for(var i=0; i<rings.length; ++i) {
type = (i==0) ? "outerBoundaryIs" : "innerBoundaryIs";
ringMember = this.createElementNS(this.gmlns,
"gml:" + type);
ringGeom = this.buildGeometry.linearring.apply(this,
[rings[i]]);
ringMember.appendChild(ringGeom);
gml.appendChild(ringMember);
}
return gml;
},
/**
* Method: buildGeometry.multipolygon
* Given an OpenLayers multipolygon geometry, create a GML multipolygon.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.MultiPolygon>} A multipolygon
* geometry.
*
* Returns:
* {DOMElement} A GML multipolygon node.
*/
multipolygon: function(geometry) {
var gml = this.createElementNS(this.gmlns, "gml:MultiPolygon");
var polys = geometry.components;
var polyMember, polyGeom;
for(var i=0; i<polys.length; ++i) {
polyMember = this.createElementNS(this.gmlns,
"gml:polygonMember");
polyGeom = this.buildGeometry.polygon.apply(this,
[polys[i]]);
polyMember.appendChild(polyGeom);
gml.appendChild(polyMember);
}
return gml;
},
/**
* Method: buildGeometry.bounds
* Given an OpenLayers bounds, create a GML box.
*
* Parameters:
* bounds - {<OpenLayers.Geometry.Bounds>} A bounds object.
*
* Returns:
* {DOMElement} A GML box node.
*/
bounds: function(bounds) {
var gml = this.createElementNS(this.gmlns, "gml:Box");
gml.appendChild(this.buildCoordinatesNode(bounds));
return gml;
}
},
/**
* Method: buildCoordinates
* builds the coordinates XmlNode
* (code)
* <gml:coordinates decimal="." cs="," ts=" ">...</gml:coordinates>
* (end)
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {XmlNode} created xmlNode
*/
buildCoordinatesNode: function(geometry) {
var coordinatesNode = this.createElementNS(this.gmlns,
"gml:coordinates");
coordinatesNode.setAttribute("decimal", ".");
coordinatesNode.setAttribute("cs", ",");
coordinatesNode.setAttribute("ts", " ");
var parts = [];
if(geometry instanceof OpenLayers.Bounds){
parts.push(geometry.left + "," + geometry.bottom);
parts.push(geometry.right + "," + geometry.top);
} else {
var points = (geometry.components) ? geometry.components : [geometry];
for(var i=0; i<points.length; i++) {
parts.push(points[i].x + "," + points[i].y);
}
}
var txtNode = this.createTextNode(parts.join(" "));
coordinatesNode.appendChild(txtNode);
return coordinatesNode;
},
CLASS_NAME: "OpenLayers.Format.GML"
});
/* ======================================================================
OpenLayers/Format/GML/Base.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Format/GML.js
*/
/**
* Though required in the full build, if the GML format is excluded, we set
* the namespace here.
*/
if(!OpenLayers.Format.GML) {
OpenLayers.Format.GML = {};
}
/**
* Class: OpenLayers.Format.GML.Base
* Superclass for GML parsers.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.GML.Base = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
gml: "http://www.opengis.net/gml",
xlink: "http://www.w3.org/1999/xlink",
xsi: "http://www.w3.org/2001/XMLSchema-instance",
wfs: "http://www.opengis.net/wfs" // this is a convenience for reading wfs:FeatureCollection
},
/**
* Property: defaultPrefix
*/
defaultPrefix: "gml",
/**
* Property: schemaLocation
* {String} Schema location for a particular minor version.
*/
schemaLocation: null,
/**
* APIProperty: featureType
* {Array(String) or String} The local (without prefix) feature typeName(s).
*/
featureType: null,
/**
* APIProperty: featureNS
* {String} The feature namespace. Must be set in the options at
* construction.
*/
featureNS: null,
/**
* APIProperty: geometry
* {String} Name of geometry element. Defaults to "geometry". If null, it
* will be set on <read> when the first geometry is parsed.
*/
geometryName: "geometry",
/**
* APIProperty: extractAttributes
* {Boolean} Extract attributes from GML. Default is true.
*/
extractAttributes: true,
/**
* APIProperty: srsName
* {String} URI for spatial reference system. This is optional for
* single part geometries and mandatory for collections and multis.
* If set, the srsName attribute will be written for all geometries.
* Default is null.
*/
srsName: null,
/**
* APIProperty: xy
* {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
* Changing is not recommended, a new Format should be instantiated.
*/
xy: true,
/**
* Property: geometryTypes
* {Object} Maps OpenLayers geometry class names to GML element names.
* Use <setGeometryTypes> before accessing this property.
*/
geometryTypes: null,
/**
* Property: singleFeatureType
* {Boolean} True if there is only 1 featureType, and not an array
* of featuretypes.
*/
singleFeatureType: null,
/**
* Property: autoConfig
* {Boolean} Indicates if the format was configured without a <featureNS>,
* but auto-configured <featureNS> and <featureType> during read.
* Subclasses making use of <featureType> auto-configuration should make
* the first call to the <readNode> method (usually in the read method)
* with true as 3rd argument, so the auto-configured featureType can be
* reset and the format can be reused for subsequent reads with data from
* different featureTypes. Set to false after read if you want to keep the
* auto-configured values.
*/
/**
* Property: regExes
* Compiled regular expressions for manipulating strings.
*/
regExes: {
trimSpace: (/^\s*|\s*$/g),
removeSpace: (/\s*/g),
splitSpace: (/\s+/),
trimComma: (/\s*,\s*/g),
featureMember: (/^(.*:)?featureMembers?$/)
},
/**
* Constructor: OpenLayers.Format.GML.Base
* Instances of this class are not created directly. Use the
* <OpenLayers.Format.GML.v2> or <OpenLayers.Format.GML.v3> constructor
* instead.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*
* Valid options properties:
* featureType - {Array(String) or String} Local (without prefix) feature
* typeName(s) (required for write).
* featureNS - {String} Feature namespace (required for write).
* geometryName - {String} Geometry element name (required for write).
*/
initialize: function(options) {
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
this.setGeometryTypes();
if(options && options.featureNS) {
this.setNamespace("feature", options.featureNS);
}
this.singleFeatureType = !options || (typeof options.featureType === "string");
},
/**
* Method: read
*
* Parameters:
* data - {DOMElement} A gml:featureMember element, a gml:featureMembers
* element, or an element containing either of the above at any level.
*
* Returns:
* {Array(<OpenLayers.Feature.Vector>)} An array of features.
*/
read: function(data) {
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
if(data && data.nodeType == 9) {
data = data.documentElement;
}
var features = [];
this.readNode(data, {features: features}, true);
if(features.length == 0) {
// look for gml:featureMember elements
var elements = this.getElementsByTagNameNS(
data, this.namespaces.gml, "featureMember"
);
if(elements.length) {
for(var i=0, len=elements.length; i<len; ++i) {
this.readNode(elements[i], {features: features}, true);
}
} else {
// look for gml:featureMembers elements (this is v3, but does no harm here)
var elements = this.getElementsByTagNameNS(
data, this.namespaces.gml, "featureMembers"
);
if(elements.length) {
// there can be only one
this.readNode(elements[0], {features: features}, true);
}
}
}
return features;
},
/**
* Method: readNode
* Shorthand for applying one of the named readers given the node
* namespace and local name. Readers take two args (node, obj) and
* generally extend or modify the second.
*
* Parameters:
* node - {DOMElement} The node to be read (required).
* obj - {Object} The object to be modified (optional).
* first - {Boolean} Should be set to true for the first node read. This
* is usually the readNode call in the read method. Without this being
* set, auto-configured properties will stick on subsequent reads.
*
* Returns:
* {Object} The input object, modified (or a new one if none was provided).
*/
readNode: function(node, obj, first) {
// on subsequent calls of format.read(), we want to reset auto-
// configured properties and auto-configure again.
if (first === true && this.autoConfig === true) {
this.featureType = null;
delete this.namespaceAlias[this.featureNS];
delete this.namespaces["feature"];
this.featureNS = null;
}
// featureType auto-configuration
if (!this.featureNS && (!(node.prefix in this.namespaces) &&
node.parentNode.namespaceURI == this.namespaces["gml"] &&
this.regExes.featureMember.test(node.parentNode.nodeName))) {
this.featureType = node.nodeName.split(":").pop();
this.setNamespace("feature", node.namespaceURI);
this.featureNS = node.namespaceURI;
this.autoConfig = true;
}
return OpenLayers.Format.XML.prototype.readNode.apply(this, [node, obj]);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"gml": {
"_inherit": function(node, obj, container) {
// To be implemented by version specific parsers
},
"featureMember": function(node, obj) {
this.readChildNodes(node, obj);
},
"featureMembers": function(node, obj) {
this.readChildNodes(node, obj);
},
"name": function(node, obj) {
obj.name = this.getChildValue(node);
},
"boundedBy": function(node, obj) {
var container = {};
this.readChildNodes(node, container);
if(container.components && container.components.length > 0) {
obj.bounds = container.components[0];
}
},
"Point": function(node, container) {
var obj = {points: []};
this.readChildNodes(node, obj);
if(!container.components) {
container.components = [];
}
container.components.push(obj.points[0]);
},
"coordinates": function(node, obj) {
var str = this.getChildValue(node).replace(
this.regExes.trimSpace, ""
);
str = str.replace(this.regExes.trimComma, ",");
var pointList = str.split(this.regExes.splitSpace);
var coords;
var numPoints = pointList.length;
var points = new Array(numPoints);
for(var i=0; i<numPoints; ++i) {
coords = pointList[i].split(",");
if (this.xy) {
points[i] = new OpenLayers.Geometry.Point(
coords[0], coords[1], coords[2]
);
} else {
points[i] = new OpenLayers.Geometry.Point(
coords[1], coords[0], coords[2]
);
}
}
obj.points = points;
},
"coord": function(node, obj) {
var coord = {};
this.readChildNodes(node, coord);
if(!obj.points) {
obj.points = [];
}
obj.points.push(new OpenLayers.Geometry.Point(
coord.x, coord.y, coord.z
));
},
"X": function(node, coord) {
coord.x = this.getChildValue(node);
},
"Y": function(node, coord) {
coord.y = this.getChildValue(node);
},
"Z": function(node, coord) {
coord.z = this.getChildValue(node);
},
"MultiPoint": function(node, container) {
var obj = {components: []};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
container.components = [
new OpenLayers.Geometry.MultiPoint(obj.components)
];
},
"pointMember": function(node, obj) {
this.readChildNodes(node, obj);
},
"LineString": function(node, container) {
var obj = {};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
if(!container.components) {
container.components = [];
}
container.components.push(
new OpenLayers.Geometry.LineString(obj.points)
);
},
"MultiLineString": function(node, container) {
var obj = {components: []};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
container.components = [
new OpenLayers.Geometry.MultiLineString(obj.components)
];
},
"lineStringMember": function(node, obj) {
this.readChildNodes(node, obj);
},
"Polygon": function(node, container) {
var obj = {outer: null, inner: []};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
obj.inner.unshift(obj.outer);
if(!container.components) {
container.components = [];
}
container.components.push(
new OpenLayers.Geometry.Polygon(obj.inner)
);
},
"LinearRing": function(node, obj) {
var container = {};
this.readers.gml._inherit.apply(this, [node, container]);
this.readChildNodes(node, container);
obj.components = [new OpenLayers.Geometry.LinearRing(
container.points
)];
},
"MultiPolygon": function(node, container) {
var obj = {components: []};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
container.components = [
new OpenLayers.Geometry.MultiPolygon(obj.components)
];
},
"polygonMember": function(node, obj) {
this.readChildNodes(node, obj);
},
"GeometryCollection": function(node, container) {
var obj = {components: []};
this.readers.gml._inherit.apply(this, [node, obj, container]);
this.readChildNodes(node, obj);
container.components = [
new OpenLayers.Geometry.Collection(obj.components)
];
},
"geometryMember": function(node, obj) {
this.readChildNodes(node, obj);
}
},
"feature": {
"*": function(node, obj) {
// The node can either be named like the featureType, or it
// can be a child of the feature:featureType. Children can be
// geometry or attributes.
var name;
var local = node.localName || node.nodeName.split(":").pop();
// Since an attribute can have the same name as the feature type
// we only want to read the node as a feature if the parent
// node can have feature nodes as children. In this case, the
// obj.features property is set.
if (obj.features) {
if (!this.singleFeatureType &&
(OpenLayers.Util.indexOf(this.featureType, local) !== -1)) {
name = "_typeName";
} else if(local === this.featureType) {
name = "_typeName";
}
} else {
// Assume attribute elements have one child node and that the child
// is a text node. Otherwise assume it is a geometry node.
if(node.childNodes.length == 0 ||
(node.childNodes.length == 1 && node.firstChild.nodeType == 3)) {
if(this.extractAttributes) {
name = "_attribute";
}
} else {
name = "_geometry";
}
}
if(name) {
this.readers.feature[name].apply(this, [node, obj]);
}
},
"_typeName": function(node, obj) {
var container = {components: [], attributes: {}};
this.readChildNodes(node, container);
// look for common gml namespaced elements
if(container.name) {
container.attributes.name = container.name;
}
var feature = new OpenLayers.Feature.Vector(
container.components[0], container.attributes
);
if (!this.singleFeatureType) {
feature.type = node.nodeName.split(":").pop();
feature.namespace = node.namespaceURI;
}
var fid = node.getAttribute("fid") ||
this.getAttributeNS(node, this.namespaces["gml"], "id");
if(fid) {
feature.fid = fid;
}
if(this.internalProjection && this.externalProjection &&
feature.geometry) {
feature.geometry.transform(
this.externalProjection, this.internalProjection
);
}
if(container.bounds) {
feature.bounds = container.bounds;
}
obj.features.push(feature);
},
"_geometry": function(node, obj) {
if (!this.geometryName) {
this.geometryName = node.nodeName.split(":").pop();
}
this.readChildNodes(node, obj);
},
"_attribute": function(node, obj) {
var local = node.localName || node.nodeName.split(":").pop();
var value = this.getChildValue(node);
obj.attributes[local] = value;
}
},
"wfs": {
"FeatureCollection": function(node, obj) {
this.readChildNodes(node, obj);
}
}
},
/**
* Method: write
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
* An array of features or a single feature.
*
* Returns:
* {String} Given an array of features, a doc with a gml:featureMembers
* element will be returned. Given a single feature, a doc with a
* gml:featureMember element will be returned.
*/
write: function(features) {
var name;
if(OpenLayers.Util.isArray(features)) {
name = "featureMembers";
} else {
name = "featureMember";
}
var root = this.writeNode("gml:" + name, features);
this.setAttributeNS(
root, this.namespaces["xsi"],
"xsi:schemaLocation", this.schemaLocation
);
return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"gml": {
"featureMember": function(feature) {
var node = this.createElementNSPlus("gml:featureMember");
this.writeNode("feature:_typeName", feature, node);
return node;
},
"MultiPoint": function(geometry) {
var node = this.createElementNSPlus("gml:MultiPoint");
var components = geometry.components || [geometry];
for(var i=0, ii=components.length; i<ii; ++i) {
this.writeNode("pointMember", components[i], node);
}
return node;
},
"pointMember": function(geometry) {
var node = this.createElementNSPlus("gml:pointMember");
this.writeNode("Point", geometry, node);
return node;
},
"MultiLineString": function(geometry) {
var node = this.createElementNSPlus("gml:MultiLineString");
var components = geometry.components || [geometry];
for(var i=0, ii=components.length; i<ii; ++i) {
this.writeNode("lineStringMember", components[i], node);
}
return node;
},
"lineStringMember": function(geometry) {
var node = this.createElementNSPlus("gml:lineStringMember");
this.writeNode("LineString", geometry, node);
return node;
},
"MultiPolygon": function(geometry) {
var node = this.createElementNSPlus("gml:MultiPolygon");
var components = geometry.components || [geometry];
for(var i=0, ii=components.length; i<ii; ++i) {
this.writeNode(
"polygonMember", components[i], node
);
}
return node;
},
"polygonMember": function(geometry) {
var node = this.createElementNSPlus("gml:polygonMember");
this.writeNode("Polygon", geometry, node);
return node;
},
"GeometryCollection": function(geometry) {
var node = this.createElementNSPlus("gml:GeometryCollection");
for(var i=0, len=geometry.components.length; i<len; ++i) {
this.writeNode("geometryMember", geometry.components[i], node);
}
return node;
},
"geometryMember": function(geometry) {
var node = this.createElementNSPlus("gml:geometryMember");
var child = this.writeNode("feature:_geometry", geometry);
node.appendChild(child.firstChild);
return node;
}
},
"feature": {
"_typeName": function(feature) {
var node = this.createElementNSPlus("feature:" + this.featureType, {
attributes: {fid: feature.fid}
});
if(feature.geometry) {
this.writeNode("feature:_geometry", feature.geometry, node);
}
for(var name in feature.attributes) {
var value = feature.attributes[name];
if(value != null) {
this.writeNode(
"feature:_attribute",
{name: name, value: value}, node
);
}
}
return node;
},
"_geometry": function(geometry) {
if(this.externalProjection && this.internalProjection) {
geometry = geometry.clone().transform(
this.internalProjection, this.externalProjection
);
}
var node = this.createElementNSPlus(
"feature:" + this.geometryName
);
var type = this.geometryTypes[geometry.CLASS_NAME];
var child = this.writeNode("gml:" + type, geometry, node);
if(this.srsName) {
child.setAttribute("srsName", this.srsName);
}
return node;
},
"_attribute": function(obj) {
return this.createElementNSPlus("feature:" + obj.name, {
value: obj.value
});
}
},
"wfs": {
"FeatureCollection": function(features) {
/**
* This is only here because GML2 only describes abstract
* feature collections. Typically, you would not be using
* the GML format to write wfs elements. This just provides
* some way to write out lists of features. GML3 defines the
* featureMembers element, so that is used by default instead.
*/
var node = this.createElementNSPlus("wfs:FeatureCollection");
for(var i=0, len=features.length; i<len; ++i) {
this.writeNode("gml:featureMember", features[i], node);
}
return node;
}
}
},
/**
* Method: setGeometryTypes
* Sets the <geometryTypes> mapping.
*/
setGeometryTypes: function() {
this.geometryTypes = {
"OpenLayers.Geometry.Point": "Point",
"OpenLayers.Geometry.MultiPoint": "MultiPoint",
"OpenLayers.Geometry.LineString": "LineString",
"OpenLayers.Geometry.MultiLineString": "MultiLineString",
"OpenLayers.Geometry.Polygon": "Polygon",
"OpenLayers.Geometry.MultiPolygon": "MultiPolygon",
"OpenLayers.Geometry.Collection": "GeometryCollection"
};
},
CLASS_NAME: "OpenLayers.Format.GML.Base"
});
/* ======================================================================
OpenLayers/Format/GML/v2.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/GML/Base.js
*/
/**
* Class: OpenLayers.Format.GML.v2
* Parses GML version 2.
*
* Inherits from:
* - <OpenLayers.Format.GML.Base>
*/
OpenLayers.Format.GML.v2 = OpenLayers.Class(OpenLayers.Format.GML.Base, {
/**
* Property: schemaLocation
* {String} Schema location for a particular minor version.
*/
schemaLocation: "http://www.opengis.net/gml http://schemas.opengis.net/gml/2.1.2/feature.xsd",
/**
* Constructor: OpenLayers.Format.GML.v2
* Create a parser for GML v2.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*
* Valid options properties:
* featureType - {String} Local (without prefix) feature typeName (required).
* featureNS - {String} Feature namespace (required).
* geometryName - {String} Geometry element name.
*/
initialize: function(options) {
OpenLayers.Format.GML.Base.prototype.initialize.apply(this, [options]);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"gml": OpenLayers.Util.applyDefaults({
"outerBoundaryIs": function(node, container) {
var obj = {};
this.readChildNodes(node, obj);
container.outer = obj.components[0];
},
"innerBoundaryIs": function(node, container) {
var obj = {};
this.readChildNodes(node, obj);
container.inner.push(obj.components[0]);
},
"Box": function(node, container) {
var obj = {};
this.readChildNodes(node, obj);
if(!container.components) {
container.components = [];
}
var min = obj.points[0];
var max = obj.points[1];
container.components.push(
new OpenLayers.Bounds(min.x, min.y, max.x, max.y)
);
}
}, OpenLayers.Format.GML.Base.prototype.readers["gml"]),
"feature": OpenLayers.Format.GML.Base.prototype.readers["feature"],
"wfs": OpenLayers.Format.GML.Base.prototype.readers["wfs"]
},
/**
* Method: write
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
* An array of features or a single feature.
*
* Returns:
* {String} Given an array of features, a doc with a gml:featureMembers
* element will be returned. Given a single feature, a doc with a
* gml:featureMember element will be returned.
*/
write: function(features) {
var name;
if(OpenLayers.Util.isArray(features)) {
// GML2 only has abstract feature collections
// wfs provides a feature collection from a well-known schema
name = "wfs:FeatureCollection";
} else {
name = "gml:featureMember";
}
var root = this.writeNode(name, features);
this.setAttributeNS(
root, this.namespaces["xsi"],
"xsi:schemaLocation", this.schemaLocation
);
return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"gml": OpenLayers.Util.applyDefaults({
"Point": function(geometry) {
var node = this.createElementNSPlus("gml:Point");
this.writeNode("coordinates", [geometry], node);
return node;
},
"coordinates": function(points) {
var numPoints = points.length;
var parts = new Array(numPoints);
var point;
for(var i=0; i<numPoints; ++i) {
point = points[i];
if(this.xy) {
parts[i] = point.x + "," + point.y;
} else {
parts[i] = point.y + "," + point.x;
}
if(point.z != undefined) { // allow null or undefined
parts[i] += "," + point.z;
}
}
return this.createElementNSPlus("gml:coordinates", {
attributes: {
decimal: ".", cs: ",", ts: " "
},
value: (numPoints == 1) ? parts[0] : parts.join(" ")
});
},
"LineString": function(geometry) {
var node = this.createElementNSPlus("gml:LineString");
this.writeNode("coordinates", geometry.components, node);
return node;
},
"Polygon": function(geometry) {
var node = this.createElementNSPlus("gml:Polygon");
this.writeNode("outerBoundaryIs", geometry.components[0], node);
for(var i=1; i<geometry.components.length; ++i) {
this.writeNode(
"innerBoundaryIs", geometry.components[i], node
);
}
return node;
},
"outerBoundaryIs": function(ring) {
var node = this.createElementNSPlus("gml:outerBoundaryIs");
this.writeNode("LinearRing", ring, node);
return node;
},
"innerBoundaryIs": function(ring) {
var node = this.createElementNSPlus("gml:innerBoundaryIs");
this.writeNode("LinearRing", ring, node);
return node;
},
"LinearRing": function(ring) {
var node = this.createElementNSPlus("gml:LinearRing");
this.writeNode("coordinates", ring.components, node);
return node;
},
"Box": function(bounds) {
var node = this.createElementNSPlus("gml:Box");
this.writeNode("coordinates", [
{x: bounds.left, y: bounds.bottom},
{x: bounds.right, y: bounds.top}
], node);
// srsName attribute is optional for gml:Box
if(this.srsName) {
node.setAttribute("srsName", this.srsName);
}
return node;
}
}, OpenLayers.Format.GML.Base.prototype.writers["gml"]),
"feature": OpenLayers.Format.GML.Base.prototype.writers["feature"],
"wfs": OpenLayers.Format.GML.Base.prototype.writers["wfs"]
},
CLASS_NAME: "OpenLayers.Format.GML.v2"
});
/* ======================================================================
OpenLayers/Filter/Function.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.Function
* This class represents a filter function.
* We are using this class for creation of complex
* filters that can contain filter functions as values.
* Nesting function as other functions parameter is supported.
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.Function = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: name
* {String} Name of the function.
*/
name: null,
/**
* APIProperty: params
* {Array(<OpenLayers.Filter.Function> || String || Number)} Function parameters
* For now support only other Functions, String or Number
*/
params: null,
/**
* Constructor: OpenLayers.Filter.Function
* Creates a filter function.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* function.
*
* Returns:
* {<OpenLayers.Filter.Function>}
*/
CLASS_NAME: "OpenLayers.Filter.Function"
});
/* ======================================================================
OpenLayers/BaseTypes/Date.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/SingleFile.js
*/
/**
* Namespace: OpenLayers.Date
* Contains implementations of Date.parse and date.toISOString that match the
* ECMAScript 5 specification for parsing RFC 3339 dates.
* http://tools.ietf.org/html/rfc3339
*/
OpenLayers.Date = {
/**
* APIProperty: dateRegEx
* The regex to be used for validating dates. You can provide your own
* regex for instance for adding support for years before BC. Default
* value is: /^(?:(\d{4})(?:-(\d{2})(?:-(\d{2}))?)?)?(?:(?:T(\d{1,2}):(\d{2}):(\d{2}(?:\.\d+)?)(Z|(?:[+-]\d{1,2}(?::(\d{2}))?)))|Z)?$/
*/
dateRegEx: /^(?:(\d{4})(?:-(\d{2})(?:-(\d{2}))?)?)?(?:(?:T(\d{1,2}):(\d{2}):(\d{2}(?:\.\d+)?)(Z|(?:[+-]\d{1,2}(?::(\d{2}))?)))|Z)?$/,
/**
* APIMethod: toISOString
* Generates a string representing a date. The format of the string follows
* the profile of ISO 8601 for date and time on the Internet (see
* http://tools.ietf.org/html/rfc3339). If the toISOString method is
* available on the Date prototype, that is used. The toISOString
* method for Date instances is defined in ECMA-262.
*
* Parameters:
* date - {Date} A date object.
*
* Returns:
* {String} A string representing the date (e.g.
* "2010-08-07T16:58:23.123Z"). If the date does not have a valid time
* (i.e. isNaN(date.getTime())) this method returns the string "Invalid
* Date". The ECMA standard says the toISOString method should throw
* RangeError in this case, but Firefox returns a string instead. For
* best results, use isNaN(date.getTime()) to determine date validity
* before generating date strings.
*/
toISOString: (function() {
if ("toISOString" in Date.prototype) {
return function(date) {
return date.toISOString();
};
} else {
return function(date) {
var str;
if (isNaN(date.getTime())) {
// ECMA-262 says throw RangeError, Firefox returns
// "Invalid Date"
str = "Invalid Date";
} else {
str =
date.getUTCFullYear() + "-" +
OpenLayers.Number.zeroPad(date.getUTCMonth() + 1, 2) + "-" +
OpenLayers.Number.zeroPad(date.getUTCDate(), 2) + "T" +
OpenLayers.Number.zeroPad(date.getUTCHours(), 2) + ":" +
OpenLayers.Number.zeroPad(date.getUTCMinutes(), 2) + ":" +
OpenLayers.Number.zeroPad(date.getUTCSeconds(), 2) + "." +
OpenLayers.Number.zeroPad(date.getUTCMilliseconds(), 3) + "Z";
}
return str;
};
}
})(),
/**
* APIMethod: parse
* Generate a date object from a string. The format for the string follows
* the profile of ISO 8601 for date and time on the Internet (see
* http://tools.ietf.org/html/rfc3339). We don't call the native
* Date.parse because of inconsistency between implmentations. In
* Chrome, calling Date.parse with a string that doesn't contain any
* indication of the timezone (e.g. "2011"), the date is interpreted
* in local time. On Firefox, the assumption is UTC.
*
* Parameters:
* str - {String} A string representing the date (e.g.
* "2010", "2010-08", "2010-08-07", "2010-08-07T16:58:23.123Z",
* "2010-08-07T11:58:23.123-06").
*
* Returns:
* {Date} A date object. If the string could not be parsed, an invalid
* date is returned (i.e. isNaN(date.getTime())).
*/
parse: function(str) {
var date;
var match = str.match(this.dateRegEx);
if (match && (match[1] || match[7])) { // must have at least year or time
var year = parseInt(match[1], 10) || 0;
var month = (parseInt(match[2], 10) - 1) || 0;
var day = parseInt(match[3], 10) || 1;
date = new Date(Date.UTC(year, month, day));
// optional time
var type = match[7];
if (type) {
var hours = parseInt(match[4], 10);
var minutes = parseInt(match[5], 10);
var secFrac = parseFloat(match[6]);
var seconds = secFrac | 0;
var milliseconds = Math.round(1000 * (secFrac - seconds));
date.setUTCHours(hours, minutes, seconds, milliseconds);
// check offset
if (type !== "Z") {
var hoursOffset = parseInt(type, 10);
var minutesOffset = parseInt(match[8], 10) || 0;
var offset = -1000 * (60 * (hoursOffset * 60) + minutesOffset * 60);
date = new Date(date.getTime() + offset);
}
}
} else {
date = new Date("invalid");
}
return date;
}
};
/* ======================================================================
OpenLayers/Format/Filter/v1.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/Filter.js
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Filter/Function.js
* @requires OpenLayers/BaseTypes/Date.js
*/
/**
* Class: OpenLayers.Format.Filter.v1
* Superclass for Filter version 1 parsers.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.Filter.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
ogc: "http://www.opengis.net/ogc",
gml: "http://www.opengis.net/gml",
xlink: "http://www.w3.org/1999/xlink",
xsi: "http://www.w3.org/2001/XMLSchema-instance"
},
/**
* Property: defaultPrefix
*/
defaultPrefix: "ogc",
/**
* Property: schemaLocation
* {String} Schema location for a particular minor version.
*/
schemaLocation: null,
/**
* Constructor: OpenLayers.Format.Filter.v1
* Instances of this class are not created directly. Use the
* <OpenLayers.Format.Filter> constructor instead.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
},
/**
* Method: read
*
* Parameters:
* data - {DOMElement} A Filter document element.
*
* Returns:
* {<OpenLayers.Filter>} A filter object.
*/
read: function(data) {
var obj = {};
this.readers.ogc["Filter"].apply(this, [data, obj]);
return obj.filter;
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"ogc": {
"_expression": function(node) {
// only the simplest of ogc:expression handled
// "some text and an <PropertyName>attribute</PropertyName>"}
var obj, value = "";
for(var child=node.firstChild; child; child=child.nextSibling) {
switch(child.nodeType) {
case 1:
obj = this.readNode(child);
if (obj.property) {
value += "${" + obj.property + "}";
} else if (obj.value !== undefined) {
value += obj.value;
}
break;
case 3: // text node
case 4: // cdata section
value += child.nodeValue;
}
}
return value;
},
"Filter": function(node, parent) {
// Filters correspond to subclasses of OpenLayers.Filter.
// Since they contain information we don't persist, we
// create a temporary object and then pass on the filter
// (ogc:Filter) to the parent obj.
var obj = {
fids: [],
filters: []
};
this.readChildNodes(node, obj);
if(obj.fids.length > 0) {
parent.filter = new OpenLayers.Filter.FeatureId({
fids: obj.fids
});
} else if(obj.filters.length > 0) {
parent.filter = obj.filters[0];
}
},
"FeatureId": function(node, obj) {
var fid = node.getAttribute("fid");
if(fid) {
obj.fids.push(fid);
}
},
"And": function(node, obj) {
var filter = new OpenLayers.Filter.Logical({
type: OpenLayers.Filter.Logical.AND
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"Or": function(node, obj) {
var filter = new OpenLayers.Filter.Logical({
type: OpenLayers.Filter.Logical.OR
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"Not": function(node, obj) {
var filter = new OpenLayers.Filter.Logical({
type: OpenLayers.Filter.Logical.NOT
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsLessThan": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.LESS_THAN
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsGreaterThan": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.GREATER_THAN
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsLessThanOrEqualTo": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsGreaterThanOrEqualTo": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsBetween": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.BETWEEN
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"Literal": function(node, obj) {
obj.value = OpenLayers.String.numericIf(
this.getChildValue(node), true);
},
"PropertyName": function(node, filter) {
filter.property = this.getChildValue(node);
},
"LowerBoundary": function(node, filter) {
filter.lowerBoundary = OpenLayers.String.numericIf(
this.readers.ogc._expression.call(this, node), true);
},
"UpperBoundary": function(node, filter) {
filter.upperBoundary = OpenLayers.String.numericIf(
this.readers.ogc._expression.call(this, node), true);
},
"Intersects": function(node, obj) {
this.readSpatial(node, obj, OpenLayers.Filter.Spatial.INTERSECTS);
},
"Within": function(node, obj) {
this.readSpatial(node, obj, OpenLayers.Filter.Spatial.WITHIN);
},
"Contains": function(node, obj) {
this.readSpatial(node, obj, OpenLayers.Filter.Spatial.CONTAINS);
},
"DWithin": function(node, obj) {
this.readSpatial(node, obj, OpenLayers.Filter.Spatial.DWITHIN);
},
"Distance": function(node, obj) {
obj.distance = parseInt(this.getChildValue(node));
obj.distanceUnits = node.getAttribute("units");
},
"Function": function(node, obj) {
//TODO write decoder for it
return;
},
"PropertyIsNull": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.IS_NULL
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
}
}
},
/**
* Method: readSpatial
*
* Read a {<OpenLayers.Filter.Spatial>} filter.
*
* Parameters:
* node - {DOMElement} A DOM element that contains an ogc:expression.
* obj - {Object} The target object.
* type - {String} One of the OpenLayers.Filter.Spatial.* constants.
*
* Returns:
* {<OpenLayers.Filter.Spatial>} The created filter.
*/
readSpatial: function(node, obj, type) {
var filter = new OpenLayers.Filter.Spatial({
type: type
});
this.readChildNodes(node, filter);
filter.value = filter.components[0];
delete filter.components;
obj.filters.push(filter);
},
/**
* APIMethod: encodeLiteral
* Generates the string representation of a value for use in <Literal>
* elements. The default encoder writes Date values as ISO 8601
* strings.
*
* Parameters:
* value - {Object} Literal value to encode
*
* Returns:
* {String} String representation of the provided value.
*/
encodeLiteral: function(value) {
if (value instanceof Date) {
value = OpenLayers.Date.toISOString(value);
}
return value;
},
/**
* Method: writeOgcExpression
* Limited support for writing OGC expressions. Currently it supports
* (<OpenLayers.Filter.Function> || String || Number)
*
* Parameters:
* value - (<OpenLayers.Filter.Function> || String || Number)
* node - {DOMElement} A parent DOM element
*
* Returns:
* {DOMElement} Updated node element.
*/
writeOgcExpression: function(value, node) {
if (value instanceof OpenLayers.Filter.Function){
this.writeNode("Function", value, node);
} else {
this.writeNode("Literal", value, node);
}
return node;
},
/**
* Method: write
*
* Parameters:
* filter - {<OpenLayers.Filter>} A filter object.
*
* Returns:
* {DOMElement} An ogc:Filter element.
*/
write: function(filter) {
return this.writers.ogc["Filter"].apply(this, [filter]);
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"ogc": {
"Filter": function(filter) {
var node = this.createElementNSPlus("ogc:Filter");
this.writeNode(this.getFilterType(filter), filter, node);
return node;
},
"_featureIds": function(filter) {
var node = this.createDocumentFragment();
for (var i=0, ii=filter.fids.length; i<ii; ++i) {
this.writeNode("ogc:FeatureId", filter.fids[i], node);
}
return node;
},
"FeatureId": function(fid) {
return this.createElementNSPlus("ogc:FeatureId", {
attributes: {fid: fid}
});
},
"And": function(filter) {
var node = this.createElementNSPlus("ogc:And");
var childFilter;
for (var i=0, ii=filter.filters.length; i<ii; ++i) {
childFilter = filter.filters[i];
this.writeNode(
this.getFilterType(childFilter), childFilter, node
);
}
return node;
},
"Or": function(filter) {
var node = this.createElementNSPlus("ogc:Or");
var childFilter;
for (var i=0, ii=filter.filters.length; i<ii; ++i) {
childFilter = filter.filters[i];
this.writeNode(
this.getFilterType(childFilter), childFilter, node
);
}
return node;
},
"Not": function(filter) {
var node = this.createElementNSPlus("ogc:Not");
var childFilter = filter.filters[0];
this.writeNode(
this.getFilterType(childFilter), childFilter, node
);
return node;
},
"PropertyIsLessThan": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsLessThan");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsGreaterThan": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsGreaterThan");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsLessThanOrEqualTo": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsLessThanOrEqualTo");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsGreaterThanOrEqualTo": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsGreaterThanOrEqualTo");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsBetween": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsBetween");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
this.writeNode("LowerBoundary", filter, node);
this.writeNode("UpperBoundary", filter, node);
return node;
},
"PropertyName": function(filter) {
// no ogc:expression handling for now
return this.createElementNSPlus("ogc:PropertyName", {
value: filter.property
});
},
"Literal": function(value) {
var encode = this.encodeLiteral ||
OpenLayers.Format.Filter.v1.prototype.encodeLiteral;
return this.createElementNSPlus("ogc:Literal", {
value: encode(value)
});
},
"LowerBoundary": function(filter) {
// handle Literals or Functions for now
var node = this.createElementNSPlus("ogc:LowerBoundary");
this.writeOgcExpression(filter.lowerBoundary, node);
return node;
},
"UpperBoundary": function(filter) {
// handle Literals or Functions for now
var node = this.createElementNSPlus("ogc:UpperBoundary");
this.writeNode("Literal", filter.upperBoundary, node);
return node;
},
"INTERSECTS": function(filter) {
return this.writeSpatial(filter, "Intersects");
},
"WITHIN": function(filter) {
return this.writeSpatial(filter, "Within");
},
"CONTAINS": function(filter) {
return this.writeSpatial(filter, "Contains");
},
"DWITHIN": function(filter) {
var node = this.writeSpatial(filter, "DWithin");
this.writeNode("Distance", filter, node);
return node;
},
"Distance": function(filter) {
return this.createElementNSPlus("ogc:Distance", {
attributes: {
units: filter.distanceUnits
},
value: filter.distance
});
},
"Function": function(filter) {
var node = this.createElementNSPlus("ogc:Function", {
attributes: {
name: filter.name
}
});
var params = filter.params;
for(var i=0, len=params.length; i<len; i++){
this.writeOgcExpression(params[i], node);
}
return node;
},
"PropertyIsNull": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsNull");
this.writeNode("PropertyName", filter, node);
return node;
}
}
},
/**
* Method: getFilterType
*/
getFilterType: function(filter) {
var filterType = this.filterMap[filter.type];
if(!filterType) {
throw "Filter writing not supported for rule type: " + filter.type;
}
return filterType;
},
/**
* Property: filterMap
* {Object} Contains a member for each filter type. Values are node names
* for corresponding OGC Filter child elements.
*/
filterMap: {
"&&": "And",
"||": "Or",
"!": "Not",
"==": "PropertyIsEqualTo",
"!=": "PropertyIsNotEqualTo",
"<": "PropertyIsLessThan",
">": "PropertyIsGreaterThan",
"<=": "PropertyIsLessThanOrEqualTo",
">=": "PropertyIsGreaterThanOrEqualTo",
"..": "PropertyIsBetween",
"~": "PropertyIsLike",
"NULL": "PropertyIsNull",
"BBOX": "BBOX",
"DWITHIN": "DWITHIN",
"WITHIN": "WITHIN",
"CONTAINS": "CONTAINS",
"INTERSECTS": "INTERSECTS",
"FID": "_featureIds"
},
CLASS_NAME: "OpenLayers.Format.Filter.v1"
});
/* ======================================================================
OpenLayers/Format/Filter/v1_0_0.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/GML/v2.js
* @requires OpenLayers/Format/Filter/v1.js
*/
/**
* Class: OpenLayers.Format.Filter.v1_0_0
* Write ogc:Filter version 1.0.0.
*
* Inherits from:
* - <OpenLayers.Format.GML.v2>
* - <OpenLayers.Format.Filter.v1>
*/
OpenLayers.Format.Filter.v1_0_0 = OpenLayers.Class(
OpenLayers.Format.GML.v2, OpenLayers.Format.Filter.v1, {
/**
* Constant: VERSION
* {String} 1.0.0
*/
VERSION: "1.0.0",
/**
* Property: schemaLocation
* {String} http://www.opengis.net/ogc/filter/1.0.0/filter.xsd
*/
schemaLocation: "http://www.opengis.net/ogc/filter/1.0.0/filter.xsd",
/**
* Constructor: OpenLayers.Format.Filter.v1_0_0
* Instances of this class are not created directly. Use the
* <OpenLayers.Format.Filter> constructor instead.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
OpenLayers.Format.GML.v2.prototype.initialize.apply(
this, [options]
);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"ogc": OpenLayers.Util.applyDefaults({
"PropertyIsEqualTo": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.EQUAL_TO
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsNotEqualTo": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.NOT_EQUAL_TO
});
this.readChildNodes(node, filter);
obj.filters.push(filter);
},
"PropertyIsLike": function(node, obj) {
var filter = new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.LIKE
});
this.readChildNodes(node, filter);
var wildCard = node.getAttribute("wildCard");
var singleChar = node.getAttribute("singleChar");
var esc = node.getAttribute("escape");
filter.value2regex(wildCard, singleChar, esc);
obj.filters.push(filter);
}
}, OpenLayers.Format.Filter.v1.prototype.readers["ogc"]),
"gml": OpenLayers.Format.GML.v2.prototype.readers["gml"],
"feature": OpenLayers.Format.GML.v2.prototype.readers["feature"]
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"ogc": OpenLayers.Util.applyDefaults({
"PropertyIsEqualTo": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsEqualTo");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsNotEqualTo": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsNotEqualTo");
// no ogc:expression handling for PropertyName for now
this.writeNode("PropertyName", filter, node);
// handle Literals or Functions for now
this.writeOgcExpression(filter.value, node);
return node;
},
"PropertyIsLike": function(filter) {
var node = this.createElementNSPlus("ogc:PropertyIsLike", {
attributes: {
wildCard: "*", singleChar: ".", escape: "!"
}
});
// no ogc:expression handling for now
this.writeNode("PropertyName", filter, node);
// convert regex string to ogc string
this.writeNode("Literal", filter.regex2value(), node);
return node;
},
"BBOX": function(filter) {
var node = this.createElementNSPlus("ogc:BBOX");
// PropertyName is mandatory in 1.0.0, but e.g. GeoServer also
// accepts filters without it. When this is used with
// OpenLayers.Protocol.WFS, OpenLayers.Format.WFST will set a
// missing filter.property to the geometryName that is
// configured with the protocol, which defaults to "the_geom".
// So the only way to omit this mandatory property is to not
// set the property on the filter and to set the geometryName
// on the WFS protocol to null. The latter also happens when
// the protocol is configured without a geometryName and a
// featureNS.
filter.property && this.writeNode("PropertyName", filter, node);
var box = this.writeNode("gml:Box", filter.value, node);
if(filter.projection) {
box.setAttribute("srsName", filter.projection);
}
return node;
}
}, OpenLayers.Format.Filter.v1.prototype.writers["ogc"]),
"gml": OpenLayers.Format.GML.v2.prototype.writers["gml"],
"feature": OpenLayers.Format.GML.v2.prototype.writers["feature"]
},
/**
* Method: writeSpatial
*
* Read a {<OpenLayers.Filter.Spatial>} filter and converts it into XML.
*
* Parameters:
* filter - {<OpenLayers.Filter.Spatial>} The filter.
* name - {String} Name of the generated XML element.
*
* Returns:
* {DOMElement} The created XML element.
*/
writeSpatial: function(filter, name) {
var node = this.createElementNSPlus("ogc:"+name);
this.writeNode("PropertyName", filter, node);
if(filter.value instanceof OpenLayers.Filter.Function) {
this.writeNode("Function", filter.value, node);
} else {
var child;
if(filter.value instanceof OpenLayers.Geometry) {
child = this.writeNode("feature:_geometry", filter.value).firstChild;
} else {
child = this.writeNode("gml:Box", filter.value);
}
if(filter.projection) {
child.setAttribute("srsName", filter.projection);
}
node.appendChild(child);
}
return node;
},
CLASS_NAME: "OpenLayers.Format.Filter.v1_0_0"
});
/* ======================================================================
OpenLayers/Format/WFST/v1_0_0.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/WFST/v1.js
* @requires OpenLayers/Format/Filter/v1_0_0.js
*/
/**
* Class: OpenLayers.Format.WFST.v1_0_0
* A format for creating WFS v1.0.0 transactions. Create a new instance with the
* <OpenLayers.Format.WFST.v1_0_0> constructor.
*
* Inherits from:
* - <OpenLayers.Format.Filter.v1_0_0>
* - <OpenLayers.Format.WFST.v1>
*/
OpenLayers.Format.WFST.v1_0_0 = OpenLayers.Class(
OpenLayers.Format.Filter.v1_0_0, OpenLayers.Format.WFST.v1, {
/**
* Property: version
* {String} WFS version number.
*/
version: "1.0.0",
/**
* APIProperty: srsNameInQuery
* {Boolean} If true the reference system is passed in Query requests
* via the "srsName" attribute to the "wfs:Query" element, this
* property defaults to false as it isn't WFS 1.0.0 compliant.
*/
srsNameInQuery: false,
/**
* Property: schemaLocations
* {Object} Properties are namespace aliases, values are schema locations.
*/
schemaLocations: {
"wfs": "http://schemas.opengis.net/wfs/1.0.0/WFS-transaction.xsd"
},
/**
* Constructor: OpenLayers.Format.WFST.v1_0_0
* A class for parsing and generating WFS v1.0.0 transactions.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Valid options properties:
* featureType - {String} Local (without prefix) feature typeName (required).
* featureNS - {String} Feature namespace (optional).
* featurePrefix - {String} Feature namespace alias (optional - only used
* if featureNS is provided). Default is 'feature'.
* geometryName - {String} Name of geometry attribute. Default is 'the_geom'.
*/
initialize: function(options) {
OpenLayers.Format.Filter.v1_0_0.prototype.initialize.apply(this, [options]);
OpenLayers.Format.WFST.v1.prototype.initialize.apply(this, [options]);
},
/**
* Method: readNode
* Shorthand for applying one of the named readers given the node
* namespace and local name. Readers take two args (node, obj) and
* generally extend or modify the second.
*
* Parameters:
* node - {DOMElement} The node to be read (required).
* obj - {Object} The object to be modified (optional).
* first - {Boolean} Should be set to true for the first node read. This
* is usually the readNode call in the read method. Without this being
* set, auto-configured properties will stick on subsequent reads.
*
* Returns:
* {Object} The input object, modified (or a new one if none was provided).
*/
readNode: function(node, obj, first) {
// Not the superclass, only the mixin classes inherit from
// Format.GML.v2. We need this because we don't want to get readNode
// from the superclass's superclass, which is OpenLayers.Format.XML.
return OpenLayers.Format.GML.v2.prototype.readNode.apply(this, arguments);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"wfs": OpenLayers.Util.applyDefaults({
"WFS_TransactionResponse": function(node, obj) {
obj.insertIds = [];
obj.success = false;
this.readChildNodes(node, obj);
},
"InsertResult": function(node, container) {
var obj = {fids: []};
this.readChildNodes(node, obj);
container.insertIds = container.insertIds.concat(obj.fids);
},
"TransactionResult": function(node, obj) {
this.readChildNodes(node, obj);
},
"Status": function(node, obj) {
this.readChildNodes(node, obj);
},
"SUCCESS": function(node, obj) {
obj.success = true;
}
}, OpenLayers.Format.WFST.v1.prototype.readers["wfs"]),
"gml": OpenLayers.Format.GML.v2.prototype.readers["gml"],
"feature": OpenLayers.Format.GML.v2.prototype.readers["feature"],
"ogc": OpenLayers.Format.Filter.v1_0_0.prototype.readers["ogc"]
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"wfs": OpenLayers.Util.applyDefaults({
"Query": function(options) {
options = OpenLayers.Util.extend({
featureNS: this.featureNS,
featurePrefix: this.featurePrefix,
featureType: this.featureType,
srsName: this.srsName,
srsNameInQuery: this.srsNameInQuery
}, options);
var prefix = options.featurePrefix;
var node = this.createElementNSPlus("wfs:Query", {
attributes: {
typeName: (prefix ? prefix + ":" : "") +
options.featureType
}
});
if(options.srsNameInQuery && options.srsName) {
node.setAttribute("srsName", options.srsName);
}
if(options.featureNS) {
node.setAttribute("xmlns:" + prefix, options.featureNS);
}
if(options.propertyNames) {
for(var i=0,len = options.propertyNames.length; i<len; i++) {
this.writeNode(
"ogc:PropertyName",
{property: options.propertyNames[i]},
node
);
}
}
if(options.filter) {
this.setFilterProperty(options.filter);
this.writeNode("ogc:Filter", options.filter, node);
}
return node;
}
}, OpenLayers.Format.WFST.v1.prototype.writers["wfs"]),
"gml": OpenLayers.Format.GML.v2.prototype.writers["gml"],
"feature": OpenLayers.Format.GML.v2.prototype.writers["feature"],
"ogc": OpenLayers.Format.Filter.v1_0_0.prototype.writers["ogc"]
},
CLASS_NAME: "OpenLayers.Format.WFST.v1_0_0"
});
/* ======================================================================
OpenLayers/Renderer/Elements.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Renderer.js
*/
/**
* Class: OpenLayers.ElementsIndexer
* This class takes care of figuring out which order elements should be
* placed in the DOM based on given indexing methods.
*/
OpenLayers.ElementsIndexer = OpenLayers.Class({
/**
* Property: maxZIndex
* {Integer} This is the largest-most z-index value for a node
* contained within the indexer.
*/
maxZIndex: null,
/**
* Property: order
* {Array<String>} This is an array of node id's stored in the
* order that they should show up on screen. Id's higher up in the
* array (higher array index) represent nodes with higher z-indeces.
*/
order: null,
/**
* Property: indices
* {Object} This is a hash that maps node ids to their z-index value
* stored in the indexer. This is done to make finding a nodes z-index
* value O(1).
*/
indices: null,
/**
* Property: compare
* {Function} This is the function used to determine placement of
* of a new node within the indexer. If null, this defaults to to
* the Z_ORDER_DRAWING_ORDER comparison method.
*/
compare: null,
/**
* APIMethod: initialize
* Create a new indexer with
*
* Parameters:
* yOrdering - {Boolean} Whether to use y-ordering.
*/
initialize: function(yOrdering) {
this.compare = yOrdering ?
OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER_Y_ORDER :
OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER_DRAWING_ORDER;
this.clear();
},
/**
* APIMethod: insert
* Insert a new node into the indexer. In order to find the correct
* positioning for the node to be inserted, this method uses a binary
* search. This makes inserting O(log(n)).
*
* Parameters:
* newNode - {DOMElement} The new node to be inserted.
*
* Returns
* {DOMElement} the node before which we should insert our newNode, or
* null if newNode can just be appended.
*/
insert: function(newNode) {
// If the node is known to the indexer, remove it so we can
// recalculate where it should go.
if (this.exists(newNode)) {
this.remove(newNode);
}
var nodeId = newNode.id;
this.determineZIndex(newNode);
var leftIndex = -1;
var rightIndex = this.order.length;
var middle;
while (rightIndex - leftIndex > 1) {
middle = parseInt((leftIndex + rightIndex) / 2);
var placement = this.compare(this, newNode,
OpenLayers.Util.getElement(this.order[middle]));
if (placement > 0) {
leftIndex = middle;
} else {
rightIndex = middle;
}
}
this.order.splice(rightIndex, 0, nodeId);
this.indices[nodeId] = this.getZIndex(newNode);
// If the new node should be before another in the index
// order, return the node before which we have to insert the new one;
// else, return null to indicate that the new node can be appended.
return this.getNextElement(rightIndex);
},
/**
* APIMethod: remove
*
* Parameters:
* node - {DOMElement} The node to be removed.
*/
remove: function(node) {
var nodeId = node.id;
var arrayIndex = OpenLayers.Util.indexOf(this.order, nodeId);
if (arrayIndex >= 0) {
// Remove it from the order array, as well as deleting the node
// from the indeces hash.
this.order.splice(arrayIndex, 1);
delete this.indices[nodeId];
// Reset the maxium z-index based on the last item in the
// order array.
if (this.order.length > 0) {
var lastId = this.order[this.order.length - 1];
this.maxZIndex = this.indices[lastId];
} else {
this.maxZIndex = 0;
}
}
},
/**
* APIMethod: clear
*/
clear: function() {
this.order = [];
this.indices = {};
this.maxZIndex = 0;
},
/**
* APIMethod: exists
*
* Parameters:
* node - {DOMElement} The node to test for existence.
*
* Returns:
* {Boolean} Whether or not the node exists in the indexer?
*/
exists: function(node) {
return (this.indices[node.id] != null);
},
/**
* APIMethod: getZIndex
* Get the z-index value for the current node from the node data itself.
*
* Parameters:
* node - {DOMElement} The node whose z-index to get.
*
* Returns:
* {Integer} The z-index value for the specified node (from the node
* data itself).
*/
getZIndex: function(node) {
return node._style.graphicZIndex;
},
/**
* Method: determineZIndex
* Determine the z-index for the current node if there isn't one,
* and set the maximum value if we've found a new maximum.
*
* Parameters:
* node - {DOMElement}
*/
determineZIndex: function(node) {
var zIndex = node._style.graphicZIndex;
// Everything must have a zIndex. If none is specified,
// this means the user *must* (hint: assumption) want this
// node to succomb to drawing order. To enforce drawing order
// over all indexing methods, we'll create a new z-index that's
// greater than any currently in the indexer.
if (zIndex == null) {
zIndex = this.maxZIndex;
node._style.graphicZIndex = zIndex;
} else if (zIndex > this.maxZIndex) {
this.maxZIndex = zIndex;
}
},
/**
* APIMethod: getNextElement
* Get the next element in the order stack.
*
* Parameters:
* index - {Integer} The index of the current node in this.order.
*
* Returns:
* {DOMElement} the node following the index passed in, or
* null.
*/
getNextElement: function(index) {
var nextIndex = index + 1;
if (nextIndex < this.order.length) {
var nextElement = OpenLayers.Util.getElement(this.order[nextIndex]);
if (nextElement == undefined) {
nextElement = this.getNextElement(nextIndex);
}
return nextElement;
} else {
return null;
}
},
CLASS_NAME: "OpenLayers.ElementsIndexer"
});
/**
* Namespace: OpenLayers.ElementsIndexer.IndexingMethods
* These are the compare methods for figuring out where a new node should be
* placed within the indexer. These methods are very similar to general
* sorting methods in that they return -1, 0, and 1 to specify the
* direction in which new nodes fall in the ordering.
*/
OpenLayers.ElementsIndexer.IndexingMethods = {
/**
* Method: Z_ORDER
* This compare method is used by other comparison methods.
* It can be used individually for ordering, but is not recommended,
* because it doesn't subscribe to drawing order.
*
* Parameters:
* indexer - {<OpenLayers.ElementsIndexer>}
* newNode - {DOMElement}
* nextNode - {DOMElement}
*
* Returns:
* {Integer}
*/
Z_ORDER: function(indexer, newNode, nextNode) {
var newZIndex = indexer.getZIndex(newNode);
var returnVal = 0;
if (nextNode) {
var nextZIndex = indexer.getZIndex(nextNode);
returnVal = newZIndex - nextZIndex;
}
return returnVal;
},
/**
* APIMethod: Z_ORDER_DRAWING_ORDER
* This method orders nodes by their z-index, but does so in a way
* that, if there are other nodes with the same z-index, the newest
* drawn will be the front most within that z-index. This is the
* default indexing method.
*
* Parameters:
* indexer - {<OpenLayers.ElementsIndexer>}
* newNode - {DOMElement}
* nextNode - {DOMElement}
*
* Returns:
* {Integer}
*/
Z_ORDER_DRAWING_ORDER: function(indexer, newNode, nextNode) {
var returnVal = OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER(
indexer,
newNode,
nextNode
);
// Make Z_ORDER subscribe to drawing order by pushing it above
// all of the other nodes with the same z-index.
if (nextNode && returnVal == 0) {
returnVal = 1;
}
return returnVal;
},
/**
* APIMethod: Z_ORDER_Y_ORDER
* This one should really be called Z_ORDER_Y_ORDER_DRAWING_ORDER, as it
* best describes which ordering methods have precedence (though, the
* name would be too long). This method orders nodes by their z-index,
* but does so in a way that, if there are other nodes with the same
* z-index, the nodes with the lower y position will be "closer" than
* those with a higher y position. If two nodes have the exact same y
* position, however, then this method will revert to using drawing
* order to decide placement.
*
* Parameters:
* indexer - {<OpenLayers.ElementsIndexer>}
* newNode - {DOMElement}
* nextNode - {DOMElement}
*
* Returns:
* {Integer}
*/
Z_ORDER_Y_ORDER: function(indexer, newNode, nextNode) {
var returnVal = OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER(
indexer,
newNode,
nextNode
);
if (nextNode && returnVal === 0) {
var result = nextNode._boundsBottom - newNode._boundsBottom;
returnVal = (result === 0) ? 1 : result;
}
return returnVal;
}
};
/**
* Class: OpenLayers.Renderer.Elements
* This is another virtual class in that it should never be instantiated by
* itself as a Renderer. It exists because there is *tons* of shared
* functionality between different vector libraries which use nodes/elements
* as a base for rendering vectors.
*
* The highlevel bits of code that are implemented here are the adding and
* removing of geometries, which is essentially the same for any
* element-based renderer. The details of creating each node and drawing the
* paths are of course different, but the machinery is the same.
*
* Inherits:
* - <OpenLayers.Renderer>
*/
OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
/**
* Property: rendererRoot
* {DOMElement}
*/
rendererRoot: null,
/**
* Property: root
* {DOMElement}
*/
root: null,
/**
* Property: vectorRoot
* {DOMElement}
*/
vectorRoot: null,
/**
* Property: textRoot
* {DOMElement}
*/
textRoot: null,
/**
* Property: xmlns
* {String}
*/
xmlns: null,
/**
* Property: xOffset
* {Number} Offset to apply to the renderer viewport translation in x
* direction. If the renderer extent's center is on the right of the
* dateline (i.e. exceeds the world bounds), we shift the viewport to the
* left by one world width. This avoids that features disappear from the
* map viewport. Because our dateline handling logic in other places
* ensures that extents crossing the dateline always have a center
* exceeding the world bounds on the left, we need this offset to make sure
* that the same is true for the renderer extent in pixel space as well.
*/
xOffset: 0,
/**
* Property: rightOfDateLine
* {Boolean} Keeps track of the location of the map extent relative to the
* date line. The <setExtent> method compares this value (which is the one
* from the previous <setExtent> call) with the current position of the map
* extent relative to the date line and updates the xOffset when the extent
* has moved from one side of the date line to the other.
*/
/**
* Property: Indexer
* {<OpenLayers.ElementIndexer>} An instance of OpenLayers.ElementsIndexer
* created upon initialization if the zIndexing or yOrdering options
* passed to this renderer's constructor are set to true.
*/
indexer: null,
/**
* Constant: BACKGROUND_ID_SUFFIX
* {String}
*/
BACKGROUND_ID_SUFFIX: "_background",
/**
* Constant: LABEL_ID_SUFFIX
* {String}
*/
LABEL_ID_SUFFIX: "_label",
/**
* Constant: LABEL_OUTLINE_SUFFIX
* {String}
*/
LABEL_OUTLINE_SUFFIX: "_outline",
/**
* Constructor: OpenLayers.Renderer.Elements
*
* Parameters:
* containerID - {String}
* options - {Object} options for this renderer.
*
* Supported options are:
* yOrdering - {Boolean} Whether to use y-ordering
* zIndexing - {Boolean} Whether to use z-indexing. Will be ignored
* if yOrdering is set to true.
*/
initialize: function(containerID, options) {
OpenLayers.Renderer.prototype.initialize.apply(this, arguments);
this.rendererRoot = this.createRenderRoot();
this.root = this.createRoot("_root");
this.vectorRoot = this.createRoot("_vroot");
this.textRoot = this.createRoot("_troot");
this.root.appendChild(this.vectorRoot);
this.root.appendChild(this.textRoot);
this.rendererRoot.appendChild(this.root);
this.container.appendChild(this.rendererRoot);
if(options && (options.zIndexing || options.yOrdering)) {
this.indexer = new OpenLayers.ElementsIndexer(options.yOrdering);
}
},
/**
* Method: destroy
*/
destroy: function() {
this.clear();
this.rendererRoot = null;
this.root = null;
this.xmlns = null;
OpenLayers.Renderer.prototype.destroy.apply(this, arguments);
},
/**
* Method: clear
* Remove all the elements from the root
*/
clear: function() {
var child;
var root = this.vectorRoot;
if (root) {
while (child = root.firstChild) {
root.removeChild(child);
}
}
root = this.textRoot;
if (root) {
while (child = root.firstChild) {
root.removeChild(child);
}
}
if (this.indexer) {
this.indexer.clear();
}
},
/**
* Method: setExtent
* Set the visible part of the layer.
*
* Parameters:
* extent - {<OpenLayers.Bounds>}
* resolutionChanged - {Boolean}
*
* Returns:
* {Boolean} true to notify the layer that the new extent does not exceed
* the coordinate range, and the features will not need to be redrawn.
* False otherwise.
*/
setExtent: function(extent, resolutionChanged) {
var coordSysUnchanged = OpenLayers.Renderer.prototype.setExtent.apply(this, arguments);
var resolution = this.getResolution();
if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
var rightOfDateLine,
ratio = extent.getWidth() / this.map.getExtent().getWidth(),
extent = extent.scale(1 / ratio),
world = this.map.getMaxExtent();
if (world.right > extent.left && world.right < extent.right) {
rightOfDateLine = true;
} else if (world.left > extent.left && world.left < extent.right) {
rightOfDateLine = false;
}
if (rightOfDateLine !== this.rightOfDateLine || resolutionChanged) {
coordSysUnchanged = false;
this.xOffset = rightOfDateLine === true ?
world.getWidth() / resolution : 0;
}
this.rightOfDateLine = rightOfDateLine;
}
return coordSysUnchanged;
},
/**
* Method: getNodeType
* This function is in charge of asking the specific renderer which type
* of node to create for the given geometry and style. All geometries
* in an Elements-based renderer consist of one node and some
* attributes. We have the nodeFactory() function which creates a node
* for us, but it takes a 'type' as input, and that is precisely what
* this function tells us.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
*
* Returns:
* {String} The corresponding node type for the specified geometry
*/
getNodeType: function(geometry, style) { },
/**
* Method: drawGeometry
* Draw the geometry, creating new nodes, setting paths, setting style,
* setting featureId on the node. This method should only be called
* by the renderer itself.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*
* Returns:
* {Boolean} true if the geometry has been drawn completely; null if
* incomplete; false otherwise
*/
drawGeometry: function(geometry, style, featureId) {
var className = geometry.CLASS_NAME;
var rendered = true;
if ((className == "OpenLayers.Geometry.Collection") ||
(className == "OpenLayers.Geometry.MultiPoint") ||
(className == "OpenLayers.Geometry.MultiLineString") ||
(className == "OpenLayers.Geometry.MultiPolygon")) {
for (var i = 0, len=geometry.components.length; i<len; i++) {
rendered = this.drawGeometry(
geometry.components[i], style, featureId) && rendered;
}
return rendered;
}
rendered = false;
var removeBackground = false;
if (style.display != "none") {
if (style.backgroundGraphic) {
this.redrawBackgroundNode(geometry.id, geometry, style,
featureId);
} else {
removeBackground = true;
}
rendered = this.redrawNode(geometry.id, geometry, style,
featureId);
}
if (rendered == false) {
var node = document.getElementById(geometry.id);
if (node) {
if (node._style.backgroundGraphic) {
removeBackground = true;
}
node.parentNode.removeChild(node);
}
}
if (removeBackground) {
var node = document.getElementById(
geometry.id + this.BACKGROUND_ID_SUFFIX);
if (node) {
node.parentNode.removeChild(node);
}
}
return rendered;
},
/**
* Method: redrawNode
*
* Parameters:
* id - {String}
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*
* Returns:
* {Boolean} true if the complete geometry could be drawn, null if parts of
* the geometry could not be drawn, false otherwise
*/
redrawNode: function(id, geometry, style, featureId) {
style = this.applyDefaultSymbolizer(style);
// Get the node if it's already on the map.
var node = this.nodeFactory(id, this.getNodeType(geometry, style));
// Set the data for the node, then draw it.
node._featureId = featureId;
node._boundsBottom = geometry.getBounds().bottom;
node._geometryClass = geometry.CLASS_NAME;
node._style = style;
var drawResult = this.drawGeometryNode(node, geometry, style);
if(drawResult === false) {
return false;
}
node = drawResult.node;
// Insert the node into the indexer so it can show us where to
// place it. Note that this operation is O(log(n)). If there's a
// performance problem (when dragging, for instance) this is
// likely where it would be.
if (this.indexer) {
var insert = this.indexer.insert(node);
if (insert) {
this.vectorRoot.insertBefore(node, insert);
} else {
this.vectorRoot.appendChild(node);
}
} else {
// if there's no indexer, simply append the node to root,
// but only if the node is a new one
if (node.parentNode !== this.vectorRoot){
this.vectorRoot.appendChild(node);
}
}
this.postDraw(node);
return drawResult.complete;
},
/**
* Method: redrawBackgroundNode
* Redraws the node using special 'background' style properties. Basically
* just calls redrawNode(), but instead of directly using the
* 'externalGraphic', 'graphicXOffset', 'graphicYOffset', and
* 'graphicZIndex' properties directly from the specified 'style'
* parameter, we create a new style object and set those properties
* from the corresponding 'background'-prefixed properties from
* specified 'style' parameter.
*
* Parameters:
* id - {String}
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
* featureId - {String}
*
* Returns:
* {Boolean} true if the complete geometry could be drawn, null if parts of
* the geometry could not be drawn, false otherwise
*/
redrawBackgroundNode: function(id, geometry, style, featureId) {
var backgroundStyle = OpenLayers.Util.extend({}, style);
// Set regular style attributes to apply to the background styles.
backgroundStyle.externalGraphic = backgroundStyle.backgroundGraphic;
backgroundStyle.graphicXOffset = backgroundStyle.backgroundXOffset;
backgroundStyle.graphicYOffset = backgroundStyle.backgroundYOffset;
backgroundStyle.graphicZIndex = backgroundStyle.backgroundGraphicZIndex;
backgroundStyle.graphicWidth = backgroundStyle.backgroundWidth || backgroundStyle.graphicWidth;
backgroundStyle.graphicHeight = backgroundStyle.backgroundHeight || backgroundStyle.graphicHeight;
// Erase background styles.
backgroundStyle.backgroundGraphic = null;
backgroundStyle.backgroundXOffset = null;
backgroundStyle.backgroundYOffset = null;
backgroundStyle.backgroundGraphicZIndex = null;
return this.redrawNode(
id + this.BACKGROUND_ID_SUFFIX,
geometry,
backgroundStyle,
null
);
},
/**
* Method: drawGeometryNode
* Given a node, draw a geometry on the specified layer.
* node and geometry are required arguments, style is optional.
* This method is only called by the render itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
*
* Returns:
* {Object} a hash with properties "node" (the drawn node) and "complete"
* (null if parts of the geometry could not be drawn, false if nothing
* could be drawn)
*/
drawGeometryNode: function(node, geometry, style) {
style = style || node._style;
var options = {
'isFilled': style.fill === undefined ?
true :
style.fill,
'isStroked': style.stroke === undefined ?
!!style.strokeWidth :
style.stroke
};
var drawn;
switch (geometry.CLASS_NAME) {
case "OpenLayers.Geometry.Point":
if(style.graphic === false) {
options.isFilled = false;
options.isStroked = false;
}
drawn = this.drawPoint(node, geometry);
break;
case "OpenLayers.Geometry.LineString":
options.isFilled = false;
drawn = this.drawLineString(node, geometry);
break;
case "OpenLayers.Geometry.LinearRing":
drawn = this.drawLinearRing(node, geometry);
break;
case "OpenLayers.Geometry.Polygon":
drawn = this.drawPolygon(node, geometry);
break;
case "OpenLayers.Geometry.Rectangle":
drawn = this.drawRectangle(node, geometry);
break;
default:
break;
}
node._options = options;
//set style
//TBD simplify this
if (drawn != false) {
return {
node: this.setStyle(node, style, options, geometry),
complete: drawn
};
} else {
return false;
}
},
/**
* Method: postDraw
* Things that have do be done after the geometry node is appended
* to its parent node. To be overridden by subclasses.
*
* Parameters:
* node - {DOMElement}
*/
postDraw: function(node) {},
/**
* Method: drawPoint
* Virtual function for drawing Point Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the point
*/
drawPoint: function(node, geometry) {},
/**
* Method: drawLineString
* Virtual function for drawing LineString Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components of
* the linestring, or false if nothing could be drawn
*/
drawLineString: function(node, geometry) {},
/**
* Method: drawLinearRing
* Virtual function for drawing LinearRing Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components
* of the linear ring, or false if nothing could be drawn
*/
drawLinearRing: function(node, geometry) {},
/**
* Method: drawPolygon
* Virtual function for drawing Polygon Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components
* of the polygon, or false if nothing could be drawn
*/
drawPolygon: function(node, geometry) {},
/**
* Method: drawRectangle
* Virtual function for drawing Rectangle Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the rectangle
*/
drawRectangle: function(node, geometry) {},
/**
* Method: drawCircle
* Virtual function for drawing Circle Geometry.
* Should be implemented by subclasses.
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the circle
*/
drawCircle: function(node, geometry) {},
/**
* Method: removeText
* Removes a label
*
* Parameters:
* featureId - {String}
*/
removeText: function(featureId) {
var label = document.getElementById(featureId + this.LABEL_ID_SUFFIX);
if (label) {
this.textRoot.removeChild(label);
}
var outline = document.getElementById(featureId + this.LABEL_OUTLINE_SUFFIX);
if (outline) {
this.textRoot.removeChild(outline);
}
},
/**
* Method: getFeatureIdFromEvent
*
* Parameters:
* evt - {Object} An <OpenLayers.Event> object
*
* Returns:
* {String} A feature id or undefined.
*/
getFeatureIdFromEvent: function(evt) {
var target = evt.target;
var useElement = target && target.correspondingUseElement;
var node = useElement ? useElement : (target || evt.srcElement);
return node._featureId;
},
/**
* Method: eraseGeometry
* Erase a geometry from the renderer. In the case of a multi-geometry,
* we cycle through and recurse on ourselves. Otherwise, we look for a
* node with the geometry.id, destroy its geometry, and remove it from
* the DOM.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* featureId - {String}
*/
eraseGeometry: function(geometry, featureId) {
if ((geometry.CLASS_NAME == "OpenLayers.Geometry.MultiPoint") ||
(geometry.CLASS_NAME == "OpenLayers.Geometry.MultiLineString") ||
(geometry.CLASS_NAME == "OpenLayers.Geometry.MultiPolygon") ||
(geometry.CLASS_NAME == "OpenLayers.Geometry.Collection")) {
for (var i=0, len=geometry.components.length; i<len; i++) {
this.eraseGeometry(geometry.components[i], featureId);
}
} else {
var element = OpenLayers.Util.getElement(geometry.id);
if (element && element.parentNode) {
if (element.geometry) {
element.geometry.destroy();
element.geometry = null;
}
element.parentNode.removeChild(element);
if (this.indexer) {
this.indexer.remove(element);
}
if (element._style.backgroundGraphic) {
var backgroundId = geometry.id + this.BACKGROUND_ID_SUFFIX;
var bElem = OpenLayers.Util.getElement(backgroundId);
if (bElem && bElem.parentNode) {
// No need to destroy the geometry since the element and the background
// node share the same geometry.
bElem.parentNode.removeChild(bElem);
}
}
}
}
},
/**
* Method: nodeFactory
* Create new node of the specified type, with the (optional) specified id.
*
* If node already exists with same ID and a different type, we remove it
* and then call ourselves again to recreate it.
*
* Parameters:
* id - {String}
* type - {String} type Kind of node to draw.
*
* Returns:
* {DOMElement} A new node of the given type and id.
*/
nodeFactory: function(id, type) {
var node = OpenLayers.Util.getElement(id);
if (node) {
if (!this.nodeTypeCompare(node, type)) {
node.parentNode.removeChild(node);
node = this.nodeFactory(id, type);
}
} else {
node = this.createNode(type, id);
}
return node;
},
/**
* Method: nodeTypeCompare
*
* Parameters:
* node - {DOMElement}
* type - {String} Kind of node
*
* Returns:
* {Boolean} Whether or not the specified node is of the specified type
* This function must be overridden by subclasses.
*/
nodeTypeCompare: function(node, type) {},
/**
* Method: createNode
*
* Parameters:
* type - {String} Kind of node to draw.
* id - {String} Id for node.
*
* Returns:
* {DOMElement} A new node of the given type and id.
* This function must be overridden by subclasses.
*/
createNode: function(type, id) {},
/**
* Method: moveRoot
* moves this renderer's root to a different renderer.
*
* Parameters:
* renderer - {<OpenLayers.Renderer>} target renderer for the moved root
*/
moveRoot: function(renderer) {
var root = this.root;
if(renderer.root.parentNode == this.rendererRoot) {
root = renderer.root;
}
root.parentNode.removeChild(root);
renderer.rendererRoot.appendChild(root);
},
/**
* Method: getRenderLayerId
* Gets the layer that this renderer's output appears on. If moveRoot was
* used, this will be different from the id of the layer containing the
* features rendered by this renderer.
*
* Returns:
* {String} the id of the output layer.
*/
getRenderLayerId: function() {
return this.root.parentNode.parentNode.id;
},
/**
* Method: isComplexSymbol
* Determines if a symbol cannot be rendered using drawCircle
*
* Parameters:
* graphicName - {String}
*
* Returns
* {Boolean} true if the symbol is complex, false if not
*/
isComplexSymbol: function(graphicName) {
return (graphicName != "circle") && !!graphicName;
},
CLASS_NAME: "OpenLayers.Renderer.Elements"
});
/* ======================================================================
OpenLayers/Control/Panel.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Events/buttonclick.js
*/
/**
* Class: OpenLayers.Control.Panel
* The Panel control is a container for other controls. With it toolbars
* may be composed.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.Panel = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: controls
* {Array(<OpenLayers.Control>)}
*/
controls: null,
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* true.
*/
autoActivate: true,
/**
* APIProperty: defaultControl
* {<OpenLayers.Control>} The control which is activated when the control is
* activated (turned on), which also happens at instantiation.
* If <saveState> is true, <defaultControl> will be nullified after the
* first activation of the panel.
*/
defaultControl: null,
/**
* APIProperty: saveState
* {Boolean} If set to true, the active state of this panel's controls will
* be stored on panel deactivation, and restored on reactivation. Default
* is false.
*/
saveState: false,
/**
* APIProperty: allowDepress
* {Boolean} If is true the <OpenLayers.Control.TYPE_TOOL> controls can
* be deactivated by clicking the icon that represents them. Default
* is false.
*/
allowDepress: false,
/**
* Property: activeState
* {Object} stores the active state of this panel's controls.
*/
activeState: null,
/**
* Constructor: OpenLayers.Control.Panel
* Create a new control panel.
*
* Each control in the panel is represented by an icon. When clicking
* on an icon, the <activateControl> method is called.
*
* Specific properties for controls on a panel:
* type - {Number} One of <OpenLayers.Control.TYPE_TOOL>,
* <OpenLayers.Control.TYPE_TOGGLE>, <OpenLayers.Control.TYPE_BUTTON>.
* If not provided, <OpenLayers.Control.TYPE_TOOL> is assumed.
* title - {string} Text displayed when mouse is over the icon that
* represents the control.
*
* The <OpenLayers.Control.type> of a control determines the behavior when
* clicking its icon:
* <OpenLayers.Control.TYPE_TOOL> - The control is activated and other
* controls of this type in the same panel are deactivated. This is
* the default type.
* <OpenLayers.Control.TYPE_TOGGLE> - The active state of the control is
* toggled.
* <OpenLayers.Control.TYPE_BUTTON> - The
* <OpenLayers.Control.Button.trigger> method of the control is called,
* but its active state is not changed.
*
* If a control is <OpenLayers.Control.active>, it will be drawn with the
* olControl[Name]ItemActive class, otherwise with the
* olControl[Name]ItemInactive class.
*
* Parameters:
* options - {Object} An optional object whose properties will be used
* to extend the control.
*/
initialize: function(options) {
OpenLayers.Control.prototype.initialize.apply(this, [options]);
this.controls = [];
this.activeState = {};
},
/**
* APIMethod: destroy
*/
destroy: function() {
if (this.map) {
this.map.events.unregister("buttonclick", this, this.onButtonClick);
}
OpenLayers.Control.prototype.destroy.apply(this, arguments);
for (var ctl, i = this.controls.length - 1; i >= 0; i--) {
ctl = this.controls[i];
if (ctl.events) {
ctl.events.un({
activate: this.iconOn,
deactivate: this.iconOff
});
}
ctl.panel_div = null;
}
this.activeState = null;
},
/**
* APIMethod: activate
*/
activate: function() {
if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
var control;
for (var i=0, len=this.controls.length; i<len; i++) {
control = this.controls[i];
if (control === this.defaultControl ||
(this.saveState && this.activeState[control.id])) {
control.activate();
}
}
if (this.saveState === true) {
this.defaultControl = null;
}
this.redraw();
return true;
} else {
return false;
}
},
/**
* APIMethod: deactivate
*/
deactivate: function() {
if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
var control;
for (var i=0, len=this.controls.length; i<len; i++) {
control = this.controls[i];
this.activeState[control.id] = control.deactivate();
}
this.redraw();
return true;
} else {
return false;
}
},
/**
* Method: draw
*
* Returns:
* {DOMElement}
*/
draw: function() {
OpenLayers.Control.prototype.draw.apply(this, arguments);
if (this.outsideViewport) {
this.events.attachToElement(this.div);
this.events.register("buttonclick", this, this.onButtonClick);
} else {
this.map.events.register("buttonclick", this, this.onButtonClick);
}
this.addControlsToMap(this.controls);
return this.div;
},
/**
* Method: redraw
*/
redraw: function() {
for (var l=this.div.childNodes.length, i=l-1; i>=0; i--) {
this.div.removeChild(this.div.childNodes[i]);
}
this.div.innerHTML = "";
if (this.active) {
for (var i=0, len=this.controls.length; i<len; i++) {
this.div.appendChild(this.controls[i].panel_div);
}
}
},
/**
* APIMethod: activateControl
* This method is called when the user click on the icon representing a
* control in the panel.
*
* Parameters:
* control - {<OpenLayers.Control>}
*/
activateControl: function (control) {
if (!this.active) { return false; }
if (control.type == OpenLayers.Control.TYPE_BUTTON) {
control.trigger();
return;
}
if (control.type == OpenLayers.Control.TYPE_TOGGLE) {
if (control.active) {
control.deactivate();
} else {
control.activate();
}
return;
}
if (this.allowDepress && control.active) {
control.deactivate();
} else {
var c;
for (var i=0, len=this.controls.length; i<len; i++) {
c = this.controls[i];
if (c != control &&
(c.type === OpenLayers.Control.TYPE_TOOL || c.type == null)) {
c.deactivate();
}
}
control.activate();
}
},
/**
* APIMethod: addControls
* To build a toolbar, you add a set of controls to it. addControls
* lets you add a single control or a list of controls to the
* Control Panel.
*
* Parameters:
* controls - {<OpenLayers.Control>} Controls to add in the panel.
*/
addControls: function(controls) {
if (!(OpenLayers.Util.isArray(controls))) {
controls = [controls];
}
this.controls = this.controls.concat(controls);
for (var i=0, len=controls.length; i<len; i++) {
var control = controls[i],
element = this.createControlMarkup(control);
OpenLayers.Element.addClass(element,
control.displayClass + "ItemInactive");
OpenLayers.Element.addClass(element, "olButton");
if (control.title != "" && !element.title) {
element.title = control.title;
}
control.panel_div = element;
}
if (this.map) { // map.addControl() has already been called on the panel
this.addControlsToMap(controls);
this.redraw();
}
},
/**
* APIMethod: createControlMarkup
* This function just creates a div for the control. If specific HTML
* markup is needed this function can be overridden in specific classes,
* or at panel instantiation time:
*
* Example:
* (code)
* var panel = new OpenLayers.Control.Panel({
* defaultControl: control,
* // ovverride createControlMarkup to create actual buttons
* // including texts wrapped into span elements.
* createControlMarkup: function(control) {
* var button = document.createElement('button'),
* span = document.createElement('span');
* if (control.text) {
* span.innerHTML = control.text;
* }
* return button;
* }
* });
* (end)
*
* Parameters:
* control - {<OpenLayers.Control>} The control to create the HTML
* markup for.
*
* Returns:
* {DOMElement} The markup.
*/
createControlMarkup: function(control) {
return document.createElement("div");
},
/**
* Method: addControlsToMap
* Only for internal use in draw() and addControls() methods.
*
* Parameters:
* controls - {Array(<OpenLayers.Control>)} Controls to add into map.
*/
addControlsToMap: function (controls) {
var control;
for (var i=0, len=controls.length; i<len; i++) {
control = controls[i];
if (control.autoActivate === true) {
control.autoActivate = false;
this.map.addControl(control);
control.autoActivate = true;
} else {
this.map.addControl(control);
control.deactivate();
}
control.events.on({
activate: this.iconOn,
deactivate: this.iconOff
});
}
},
/**
* Method: iconOn
* Internal use, for use only with "controls[i].events.on/un".
*/
iconOn: function() {
var d = this.panel_div; // "this" refers to a control on panel!
var re = new RegExp("\\b(" + this.displayClass + "Item)Inactive\\b");
d.className = d.className.replace(re, "$1Active");
},
/**
* Method: iconOff
* Internal use, for use only with "controls[i].events.on/un".
*/
iconOff: function() {
var d = this.panel_div; // "this" refers to a control on panel!
var re = new RegExp("\\b(" + this.displayClass + "Item)Active\\b");
d.className = d.className.replace(re, "$1Inactive");
},
/**
* Method: onButtonClick
*
* Parameters:
* evt - {Event}
*/
onButtonClick: function (evt) {
var controls = this.controls,
button = evt.buttonElement;
for (var i=controls.length-1; i>=0; --i) {
if (controls[i].panel_div === button) {
this.activateControl(controls[i]);
break;
}
}
},
/**
* APIMethod: getControlsBy
* Get a list of controls with properties matching the given criteria.
*
* Parameters:
* property - {String} A control property to be matched.
* match - {String | Object} A string to match. Can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* match.test(control[property]) evaluates to true, the control will be
* included in the array returned. If no controls are found, an empty
* array is returned.
*
* Returns:
* {Array(<OpenLayers.Control>)} A list of controls matching the given criteria.
* An empty array is returned if no matches are found.
*/
getControlsBy: function(property, match) {
var test = (typeof match.test == "function");
var found = OpenLayers.Array.filter(this.controls, function(item) {
return item[property] == match || (test && match.test(item[property]));
});
return found;
},
/**
* APIMethod: getControlsByName
* Get a list of contorls with names matching the given name.
*
* Parameters:
* match - {String | Object} A control name. The name can also be a regular
* expression literal or object. In addition, it can be any object
* with a method named test. For reqular expressions or other, if
* name.test(control.name) evaluates to true, the control will be included
* in the list of controls returned. If no controls are found, an empty
* array is returned.
*
* Returns:
* {Array(<OpenLayers.Control>)} A list of controls matching the given name.
* An empty array is returned if no matches are found.
*/
getControlsByName: function(match) {
return this.getControlsBy("name", match);
},
/**
* APIMethod: getControlsByClass
* Get a list of controls of a given type (CLASS_NAME).
*
* Parameters:
* match - {String | Object} A control class name. The type can also be a
* regular expression literal or object. In addition, it can be any
* object with a method named test. For reqular expressions or other,
* if type.test(control.CLASS_NAME) evaluates to true, the control will
* be included in the list of controls returned. If no controls are
* found, an empty array is returned.
*
* Returns:
* {Array(<OpenLayers.Control>)} A list of controls matching the given type.
* An empty array is returned if no matches are found.
*/
getControlsByClass: function(match) {
return this.getControlsBy("CLASS_NAME", match);
},
CLASS_NAME: "OpenLayers.Control.Panel"
});
/* ======================================================================
OpenLayers/Strategy.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Strategy
* Abstract vector layer strategy class. Not to be instantiated directly. Use
* one of the strategy subclasses instead.
*/
OpenLayers.Strategy = OpenLayers.Class({
/**
* Property: layer
* {<OpenLayers.Layer.Vector>} The layer this strategy belongs to.
*/
layer: null,
/**
* Property: options
* {Object} Any options sent to the constructor.
*/
options: null,
/**
* Property: active
* {Boolean} The control is active.
*/
active: null,
/**
* Property: autoActivate
* {Boolean} The creator of the strategy can set autoActivate to false
* to fully control when the protocol is activated and deactivated.
* Defaults to true.
*/
autoActivate: true,
/**
* Property: autoDestroy
* {Boolean} The creator of the strategy can set autoDestroy to false
* to fully control when the strategy is destroyed. Defaults to
* true.
*/
autoDestroy: true,
/**
* Constructor: OpenLayers.Strategy
* Abstract class for vector strategies. Create instances of a subclass.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
this.options = options;
// set the active property here, so that user cannot override it
this.active = false;
},
/**
* APIMethod: destroy
* Clean up the strategy.
*/
destroy: function() {
this.deactivate();
this.layer = null;
this.options = null;
},
/**
* Method: setLayer
* Called to set the <layer> property.
*
* Parameters:
* layer - {<OpenLayers.Layer.Vector>}
*/
setLayer: function(layer) {
this.layer = layer;
},
/**
* Method: activate
* Activate the strategy. Register any listeners, do appropriate setup.
*
* Returns:
* {Boolean} True if the strategy was successfully activated or false if
* the strategy was already active.
*/
activate: function() {
if (!this.active) {
this.active = true;
return true;
}
return false;
},
/**
* Method: deactivate
* Deactivate the strategy. Unregister any listeners, do appropriate
* tear-down.
*
* Returns:
* {Boolean} True if the strategy was successfully deactivated or false if
* the strategy was already inactive.
*/
deactivate: function() {
if (this.active) {
this.active = false;
return true;
}
return false;
},
CLASS_NAME: "OpenLayers.Strategy"
});
/* ======================================================================
OpenLayers/Strategy/Fixed.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Strategy.js
*/
/**
* Class: OpenLayers.Strategy.Fixed
* A simple strategy that requests features once and never requests new data.
*
* Inherits from:
* - <OpenLayers.Strategy>
*/
OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
/**
* APIProperty: preload
* {Boolean} Load data before layer made visible. Enabling this may result
* in considerable overhead if your application loads many data layers
* that are not visible by default. Default is false.
*/
preload: false,
/**
* Constructor: OpenLayers.Strategy.Fixed
* Create a new Fixed strategy.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*/
/**
* Method: activate
* Activate the strategy: load data or add listener to load when visible
*
* Returns:
* {Boolean} True if the strategy was successfully activated or false if
* the strategy was already active.
*/
activate: function() {
var activated = OpenLayers.Strategy.prototype.activate.apply(this, arguments);
if(activated) {
this.layer.events.on({
"refresh": this.load,
scope: this
});
if(this.layer.visibility == true || this.preload) {
this.load();
} else {
this.layer.events.on({
"visibilitychanged": this.load,
scope: this
});
}
}
return activated;
},
/**
* Method: deactivate
* Deactivate the strategy. Undo what is done in <activate>.
*
* Returns:
* {Boolean} The strategy was successfully deactivated.
*/
deactivate: function() {
var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
if(deactivated) {
this.layer.events.un({
"refresh": this.load,
"visibilitychanged": this.load,
scope: this
});
}
return deactivated;
},
/**
* Method: load
* Tells protocol to load data and unhooks the visibilitychanged event
*
* Parameters:
* options - {Object} options to pass to protocol read.
*/
load: function(options) {
var layer = this.layer;
layer.events.triggerEvent("loadstart", {filter: layer.filter});
layer.protocol.read(OpenLayers.Util.applyDefaults({
callback: this.merge,
filter: layer.filter,
scope: this
}, options));
layer.events.un({
"visibilitychanged": this.load,
scope: this
});
},
/**
* Method: merge
* Add all features to the layer.
* If the layer projection differs from the map projection, features
* will be transformed from the layer projection to the map projection.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object passed
* by the protocol.
*/
merge: function(resp) {
var layer = this.layer;
layer.destroyFeatures();
var features = resp.features;
if (features && features.length > 0) {
var remote = layer.projection;
var local = layer.map.getProjectionObject();
if(!local.equals(remote)) {
var geom;
for(var i=0, len=features.length; i<len; ++i) {
geom = features[i].geometry;
if(geom) {
geom.transform(remote, local);
}
}
}
layer.addFeatures(features);
}
layer.events.triggerEvent("loadend", {response: resp});
},
CLASS_NAME: "OpenLayers.Strategy.Fixed"
});
/* ======================================================================
OpenLayers/Control/Zoom.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Events/buttonclick.js
*/
/**
* Class: OpenLayers.Control.Zoom
* The Zoom control is a pair of +/- links for zooming in and out.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.Zoom = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: zoomInText
* {String}
* Text for zoom-in link. Default is "+".
*/
zoomInText: "+",
/**
* APIProperty: zoomInId
* {String}
* Instead of having the control create a zoom in link, you can provide
* the identifier for an anchor element already added to the document.
* By default, an element with id "olZoomInLink" will be searched for
* and used if it exists.
*/
zoomInId: "olZoomInLink",
/**
* APIProperty: zoomOutText
* {String}
* Text for zoom-out link. Default is "\u2212".
*/
zoomOutText: "\u2212",
/**
* APIProperty: zoomOutId
* {String}
* Instead of having the control create a zoom out link, you can provide
* the identifier for an anchor element already added to the document.
* By default, an element with id "olZoomOutLink" will be searched for
* and used if it exists.
*/
zoomOutId: "olZoomOutLink",
/**
* Method: draw
*
* Returns:
* {DOMElement} A reference to the DOMElement containing the zoom links.
*/
draw: function() {
var div = OpenLayers.Control.prototype.draw.apply(this),
links = this.getOrCreateLinks(div),
zoomIn = links.zoomIn,
zoomOut = links.zoomOut,
eventsInstance = this.map.events;
if (zoomOut.parentNode !== div) {
eventsInstance = this.events;
eventsInstance.attachToElement(zoomOut.parentNode);
}
eventsInstance.register("buttonclick", this, this.onZoomClick);
this.zoomInLink = zoomIn;
this.zoomOutLink = zoomOut;
return div;
},
/**
* Method: getOrCreateLinks
*
* Parameters:
* el - {DOMElement}
*
* Return:
* {Object} Object with zoomIn and zoomOut properties referencing links.
*/
getOrCreateLinks: function(el) {
var zoomIn = document.getElementById(this.zoomInId),
zoomOut = document.getElementById(this.zoomOutId);
if (!zoomIn) {
zoomIn = document.createElement("a");
zoomIn.href = "#zoomIn";
zoomIn.appendChild(document.createTextNode(this.zoomInText));
zoomIn.className = "olControlZoomIn";
el.appendChild(zoomIn);
}
OpenLayers.Element.addClass(zoomIn, "olButton");
if (!zoomOut) {
zoomOut = document.createElement("a");
zoomOut.href = "#zoomOut";
zoomOut.appendChild(document.createTextNode(this.zoomOutText));
zoomOut.className = "olControlZoomOut";
el.appendChild(zoomOut);
}
OpenLayers.Element.addClass(zoomOut, "olButton");
return {
zoomIn: zoomIn, zoomOut: zoomOut
};
},
/**
* Method: onZoomClick
* Called when zoomin/out link is clicked.
*/
onZoomClick: function(evt) {
var button = evt.buttonElement;
if (button === this.zoomInLink) {
this.map.zoomIn();
} else if (button === this.zoomOutLink) {
this.map.zoomOut();
}
},
/**
* Method: destroy
* Clean up.
*/
destroy: function() {
if (this.map) {
this.map.events.unregister("buttonclick", this, this.onZoomClick);
}
delete this.zoomInLink;
delete this.zoomOutLink;
OpenLayers.Control.prototype.destroy.apply(this);
},
CLASS_NAME: "OpenLayers.Control.Zoom"
});
/* ======================================================================
OpenLayers/Protocol.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
*/
/**
* Class: OpenLayers.Protocol
* Abstract vector layer protocol class. Not to be instantiated directly. Use
* one of the protocol subclasses instead.
*/
OpenLayers.Protocol = OpenLayers.Class({
/**
* Property: format
* {<OpenLayers.Format>} The format used by this protocol.
*/
format: null,
/**
* Property: options
* {Object} Any options sent to the constructor.
*/
options: null,
/**
* Property: autoDestroy
* {Boolean} The creator of the protocol can set autoDestroy to false
* to fully control when the protocol is destroyed. Defaults to
* true.
*/
autoDestroy: true,
/**
* Property: defaultFilter
* {<OpenLayers.Filter>} Optional default filter to read requests
*/
defaultFilter: null,
/**
* Constructor: OpenLayers.Protocol
* Abstract class for vector protocols. Create instances of a subclass.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*/
initialize: function(options) {
options = options || {};
OpenLayers.Util.extend(this, options);
this.options = options;
},
/**
* Method: mergeWithDefaultFilter
* Merge filter passed to the read method with the default one
*
* Parameters:
* filter - {<OpenLayers.Filter>}
*/
mergeWithDefaultFilter: function(filter) {
var merged;
if (filter && this.defaultFilter) {
merged = new OpenLayers.Filter.Logical({
type: OpenLayers.Filter.Logical.AND,
filters: [this.defaultFilter, filter]
});
} else {
merged = filter || this.defaultFilter || undefined;
}
return merged;
},
/**
* APIMethod: destroy
* Clean up the protocol.
*/
destroy: function() {
this.options = null;
this.format = null;
},
/**
* APIMethod: read
* Construct a request for reading new features.
*
* Parameters:
* options - {Object} Optional object for configuring the request.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, the same object will be passed to the callback function passed
* if one exists in the options object.
*/
read: function(options) {
options = options || {};
options.filter = this.mergeWithDefaultFilter(options.filter);
},
/**
* APIMethod: create
* Construct a request for writing newly created features.
*
* Parameters:
* features - {Array({<OpenLayers.Feature.Vector>})} or
* {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, the same object will be passed to the callback function passed
* if one exists in the options object.
*/
create: function() {
},
/**
* APIMethod: update
* Construct a request updating modified features.
*
* Parameters:
* features - {Array({<OpenLayers.Feature.Vector>})} or
* {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, the same object will be passed to the callback function passed
* if one exists in the options object.
*/
update: function() {
},
/**
* APIMethod: delete
* Construct a request deleting a removed feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, the same object will be passed to the callback function passed
* if one exists in the options object.
*/
"delete": function() {
},
/**
* APIMethod: commit
* Go over the features and for each take action
* based on the feature state. Possible actions are create,
* update and delete.
*
* Parameters:
* features - {Array({<OpenLayers.Feature.Vector>})}
* options - {Object} Object whose possible keys are "create", "update",
* "delete", "callback" and "scope", the values referenced by the
* first three are objects as passed to the "create", "update", and
* "delete" methods, the value referenced by the "callback" key is
* a function which is called when the commit operation is complete
* using the scope referenced by the "scope" key.
*
* Returns:
* {Array({<OpenLayers.Protocol.Response>})} An array of
* <OpenLayers.Protocol.Response> objects.
*/
commit: function() {
},
/**
* Method: abort
* Abort an ongoing request.
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>}
*/
abort: function(response) {
},
/**
* Method: createCallback
* Returns a function that applies the given public method with resp and
* options arguments.
*
* Parameters:
* method - {Function} The method to be applied by the callback.
* response - {<OpenLayers.Protocol.Response>} The protocol response object.
* options - {Object} Options sent to the protocol method
*/
createCallback: function(method, response, options) {
return OpenLayers.Function.bind(function() {
method.apply(this, [response, options]);
}, this);
},
CLASS_NAME: "OpenLayers.Protocol"
});
/**
* Class: OpenLayers.Protocol.Response
* Protocols return Response objects to their users.
*/
OpenLayers.Protocol.Response = OpenLayers.Class({
/**
* Property: code
* {Number} - OpenLayers.Protocol.Response.SUCCESS or
* OpenLayers.Protocol.Response.FAILURE
*/
code: null,
/**
* Property: requestType
* {String} The type of request this response corresponds to. Either
* "create", "read", "update" or "delete".
*/
requestType: null,
/**
* Property: last
* {Boolean} - true if this is the last response expected in a commit,
* false otherwise, defaults to true.
*/
last: true,
/**
* Property: features
* {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>}
* The features returned in the response by the server. Depending on the
* protocol's read payload, either features or data will be populated.
*/
features: null,
/**
* Property: data
* {Object}
* The data returned in the response by the server. Depending on the
* protocol's read payload, either features or data will be populated.
*/
data: null,
/**
* Property: reqFeatures
* {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>}
* The features provided by the user and placed in the request by the
* protocol.
*/
reqFeatures: null,
/**
* Property: priv
*/
priv: null,
/**
* Property: error
* {Object} The error object in case a service exception was encountered.
*/
error: null,
/**
* Constructor: OpenLayers.Protocol.Response
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
},
/**
* Method: success
*
* Returns:
* {Boolean} - true on success, false otherwise
*/
success: function() {
return this.code > 0;
},
CLASS_NAME: "OpenLayers.Protocol.Response"
});
OpenLayers.Protocol.Response.SUCCESS = 1;
OpenLayers.Protocol.Response.FAILURE = 0;
/* ======================================================================
OpenLayers/Protocol/WFS.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Protocol.js
*/
/**
* Class: OpenLayers.Protocol.WFS
* Used to create a versioned WFS protocol. Default version is 1.0.0.
*
* Returns:
* {<OpenLayers.Protocol>} A WFS protocol of the given version.
*
* Example:
* (code)
* var protocol = new OpenLayers.Protocol.WFS({
* version: "1.1.0",
* url: "http://demo.opengeo.org/geoserver/wfs",
* featureType: "tasmania_roads",
* featureNS: "http://www.openplans.org/topp",
* geometryName: "the_geom"
* });
* (end)
*
* See the protocols for specific WFS versions for more detail.
*/
OpenLayers.Protocol.WFS = function(options) {
options = OpenLayers.Util.applyDefaults(
options, OpenLayers.Protocol.WFS.DEFAULTS
);
var cls = OpenLayers.Protocol.WFS["v"+options.version.replace(/\./g, "_")];
if(!cls) {
throw "Unsupported WFS version: " + options.version;
}
return new cls(options);
};
/**
* Function: fromWMSLayer
* Convenience function to create a WFS protocol from a WMS layer. This makes
* the assumption that a WFS requests can be issued at the same URL as
* WMS requests and that a WFS featureType exists with the same name as the
* WMS layer.
*
* This function is designed to auto-configure <url>, <featureType>,
* <featurePrefix> and <srsName> for WFS <version> 1.1.0. Note that
* srsName matching with the WMS layer will not work with WFS 1.0.0.
*
* Parameters:
* layer - {<OpenLayers.Layer.WMS>} WMS layer that has a matching WFS
* FeatureType at the same server url with the same typename.
* options - {Object} Default properties to be set on the protocol.
*
* Returns:
* {<OpenLayers.Protocol.WFS>}
*/
OpenLayers.Protocol.WFS.fromWMSLayer = function(layer, options) {
var typeName, featurePrefix;
var param = layer.params["LAYERS"];
var parts = (OpenLayers.Util.isArray(param) ? param[0] : param).split(":");
if(parts.length > 1) {
featurePrefix = parts[0];
}
typeName = parts.pop();
var protocolOptions = {
url: layer.url,
featureType: typeName,
featurePrefix: featurePrefix,
srsName: layer.projection && layer.projection.getCode() ||
layer.map && layer.map.getProjectionObject().getCode(),
version: "1.1.0"
};
return new OpenLayers.Protocol.WFS(OpenLayers.Util.applyDefaults(
options, protocolOptions
));
};
/**
* Constant: OpenLayers.Protocol.WFS.DEFAULTS
*/
OpenLayers.Protocol.WFS.DEFAULTS = {
"version": "1.0.0"
};
/* ======================================================================
OpenLayers/Request.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Events.js
* @requires OpenLayers/Request/XMLHttpRequest.js
*/
/**
* TODO: deprecate me
* Use OpenLayers.Request.proxy instead.
*/
OpenLayers.ProxyHost = "";
/**
* Namespace: OpenLayers.Request
* The OpenLayers.Request namespace contains convenience methods for working
* with XMLHttpRequests. These methods work with a cross-browser
* W3C compliant <OpenLayers.Request.XMLHttpRequest> class.
*/
if (!OpenLayers.Request) {
/**
* This allows for OpenLayers/Request/XMLHttpRequest.js to be included
* before or after this script.
*/
OpenLayers.Request = {};
}
OpenLayers.Util.extend(OpenLayers.Request, {
/**
* Constant: DEFAULT_CONFIG
* {Object} Default configuration for all requests.
*/
DEFAULT_CONFIG: {
method: "GET",
url: window.location.href,
async: true,
user: undefined,
password: undefined,
params: null,
proxy: OpenLayers.ProxyHost,
headers: {},
data: null,
callback: function() {},
success: null,
failure: null,
scope: null
},
/**
* Constant: URL_SPLIT_REGEX
*/
URL_SPLIT_REGEX: /([^:]*:)\/\/([^:]*:?[^@]*@)?([^:\/\?]*):?([^\/\?]*)/,
/**
* APIProperty: events
* {<OpenLayers.Events>} An events object that handles all
* events on the {<OpenLayers.Request>} object.
*
* All event listeners will receive an event object with three properties:
* request - {<OpenLayers.Request.XMLHttpRequest>} The request object.
* config - {Object} The config object sent to the specific request method.
* requestUrl - {String} The request url.
*
* Supported event types:
* complete - Triggered when we have a response from the request, if a
* listener returns false, no further response processing will take
* place.
* success - Triggered when the HTTP response has a success code (200-299).
* failure - Triggered when the HTTP response does not have a success code.
*/
events: new OpenLayers.Events(this),
/**
* Method: makeSameOrigin
* Using the specified proxy, returns a same origin url of the provided url.
*
* Parameters:
* url - {String} An arbitrary url
* proxy {String|Function} The proxy to use to make the provided url a
* same origin url.
*
* Returns
* {String} the same origin url. If no proxy is provided, the returned url
* will be the same as the provided url.
*/
makeSameOrigin: function(url, proxy) {
var sameOrigin = url.indexOf("http") !== 0;
var urlParts = !sameOrigin && url.match(this.URL_SPLIT_REGEX);
if (urlParts) {
var location = window.location;
sameOrigin =
urlParts[1] == location.protocol &&
urlParts[3] == location.hostname;
var uPort = urlParts[4], lPort = location.port;
if (uPort != 80 && uPort != "" || lPort != "80" && lPort != "") {
sameOrigin = sameOrigin && uPort == lPort;
}
}
if (!sameOrigin) {
if (proxy) {
if (typeof proxy == "function") {
url = proxy(url);
} else {
url = proxy + encodeURIComponent(url);
}
}
}
return url;
},
/**
* APIMethod: issue
* Create a new XMLHttpRequest object, open it, set any headers, bind
* a callback to done state, and send any data. It is recommended that
* you use one <GET>, <POST>, <PUT>, <DELETE>, <OPTIONS>, or <HEAD>.
* This method is only documented to provide detail on the configuration
* options available to all request methods.
*
* Parameters:
* config - {Object} Object containing properties for configuring the
* request. Allowed configuration properties are described below.
* This object is modified and should not be reused.
*
* Allowed config properties:
* method - {String} One of GET, POST, PUT, DELETE, HEAD, or
* OPTIONS. Default is GET.
* url - {String} URL for the request.
* async - {Boolean} Open an asynchronous request. Default is true.
* user - {String} User for relevant authentication scheme. Set
* to null to clear current user.
* password - {String} Password for relevant authentication scheme.
* Set to null to clear current password.
* proxy - {String} Optional proxy. Defaults to
* <OpenLayers.ProxyHost>.
* params - {Object} Any key:value pairs to be appended to the
* url as a query string. Assumes url doesn't already include a query
* string or hash. Typically, this is only appropriate for <GET>
* requests where the query string will be appended to the url.
* Parameter values that are arrays will be
* concatenated with a comma (note that this goes against form-encoding)
* as is done with <OpenLayers.Util.getParameterString>.
* headers - {Object} Object with header:value pairs to be set on
* the request.
* data - {String | Document} Optional data to send with the request.
* Typically, this is only used with <POST> and <PUT> requests.
* Make sure to provide the appropriate "Content-Type" header for your
* data. For <POST> and <PUT> requests, the content type defaults to
* "application-xml". If your data is a different content type, or
* if you are using a different HTTP method, set the "Content-Type"
* header to match your data type.
* callback - {Function} Function to call when request is done.
* To determine if the request failed, check request.status (200
* indicates success).
* success - {Function} Optional function to call if request status is in
* the 200s. This will be called in addition to callback above and
* would typically only be used as an alternative.
* failure - {Function} Optional function to call if request status is not
* in the 200s. This will be called in addition to callback above and
* would typically only be used as an alternative.
* scope - {Object} If callback is a public method on some object,
* set the scope to that object.
*
* Returns:
* {XMLHttpRequest} Request object. To abort the request before a response
* is received, call abort() on the request object.
*/
issue: function(config) {
// apply default config - proxy host may have changed
var defaultConfig = OpenLayers.Util.extend(
this.DEFAULT_CONFIG,
{proxy: OpenLayers.ProxyHost}
);
config = config || {};
config.headers = config.headers || {};
config = OpenLayers.Util.applyDefaults(config, defaultConfig);
config.headers = OpenLayers.Util.applyDefaults(config.headers, defaultConfig.headers);
// Always set the "X-Requested-With" header to signal that this request
// was issued through the XHR-object. Since header keys are case
// insensitive and we want to allow overriding of the "X-Requested-With"
// header through the user we cannot use applyDefaults, but have to
// check manually whether we were called with a "X-Requested-With"
// header.
var customRequestedWithHeader = false,
headerKey;
for(headerKey in config.headers) {
if (config.headers.hasOwnProperty( headerKey )) {
if (headerKey.toLowerCase() === 'x-requested-with') {
customRequestedWithHeader = true;
}
}
}
if (customRequestedWithHeader === false) {
// we did not have a custom "X-Requested-With" header
config.headers['X-Requested-With'] = 'XMLHttpRequest';
}
// create request, open, and set headers
var request = new OpenLayers.Request.XMLHttpRequest();
var url = OpenLayers.Util.urlAppend(config.url,
OpenLayers.Util.getParameterString(config.params || {}));
url = OpenLayers.Request.makeSameOrigin(url, config.proxy);
request.open(
config.method, url, config.async, config.user, config.password
);
for(var header in config.headers) {
request.setRequestHeader(header, config.headers[header]);
}
var events = this.events;
// we want to execute runCallbacks with "this" as the
// execution scope
var self = this;
request.onreadystatechange = function() {
if(request.readyState == OpenLayers.Request.XMLHttpRequest.DONE) {
var proceed = events.triggerEvent(
"complete",
{request: request, config: config, requestUrl: url}
);
if(proceed !== false) {
self.runCallbacks(
{request: request, config: config, requestUrl: url}
);
}
}
};
// send request (optionally with data) and return
// call in a timeout for asynchronous requests so the return is
// available before readyState == 4 for cached docs
if(config.async === false) {
request.send(config.data);
} else {
window.setTimeout(function(){
if (request.readyState !== 0) { // W3C: 0-UNSENT
request.send(config.data);
}
}, 0);
}
return request;
},
/**
* Method: runCallbacks
* Calls the complete, success and failure callbacks. Application
* can listen to the "complete" event, have the listener
* display a confirm window and always return false, and
* execute OpenLayers.Request.runCallbacks if the user
* hits "yes" in the confirm window.
*
* Parameters:
* options - {Object} Hash containing request, config and requestUrl keys
*/
runCallbacks: function(options) {
var request = options.request;
var config = options.config;
// bind callbacks to readyState 4 (done)
var complete = (config.scope) ?
OpenLayers.Function.bind(config.callback, config.scope) :
config.callback;
// optional success callback
var success;
if(config.success) {
success = (config.scope) ?
OpenLayers.Function.bind(config.success, config.scope) :
config.success;
}
// optional failure callback
var failure;
if(config.failure) {
failure = (config.scope) ?
OpenLayers.Function.bind(config.failure, config.scope) :
config.failure;
}
if (OpenLayers.Util.createUrlObject(config.url).protocol == "file:" &&
request.responseText) {
request.status = 200;
}
complete(request);
if (!request.status || (request.status >= 200 && request.status < 300)) {
this.events.triggerEvent("success", options);
if(success) {
success(request);
}
}
if(request.status && (request.status < 200 || request.status >= 300)) {
this.events.triggerEvent("failure", options);
if(failure) {
failure(request);
}
}
},
/**
* APIMethod: GET
* Send an HTTP GET request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to GET.
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties.
* This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
GET: function(config) {
config = OpenLayers.Util.extend(config, {method: "GET"});
return OpenLayers.Request.issue(config);
},
/**
* APIMethod: POST
* Send a POST request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to POST and "Content-Type" header set to "application/xml".
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties. The
* default "Content-Type" header will be set to "application-xml" if
* none is provided. This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
POST: function(config) {
config = OpenLayers.Util.extend(config, {method: "POST"});
// set content type to application/xml if it isn't already set
config.headers = config.headers ? config.headers : {};
if(!("CONTENT-TYPE" in OpenLayers.Util.upperCaseObject(config.headers))) {
config.headers["Content-Type"] = "application/xml";
}
return OpenLayers.Request.issue(config);
},
/**
* APIMethod: PUT
* Send an HTTP PUT request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to PUT and "Content-Type" header set to "application/xml".
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties. The
* default "Content-Type" header will be set to "application-xml" if
* none is provided. This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
PUT: function(config) {
config = OpenLayers.Util.extend(config, {method: "PUT"});
// set content type to application/xml if it isn't already set
config.headers = config.headers ? config.headers : {};
if(!("CONTENT-TYPE" in OpenLayers.Util.upperCaseObject(config.headers))) {
config.headers["Content-Type"] = "application/xml";
}
return OpenLayers.Request.issue(config);
},
/**
* APIMethod: DELETE
* Send an HTTP DELETE request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to DELETE.
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties.
* This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
DELETE: function(config) {
config = OpenLayers.Util.extend(config, {method: "DELETE"});
return OpenLayers.Request.issue(config);
},
/**
* APIMethod: HEAD
* Send an HTTP HEAD request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to HEAD.
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties.
* This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
HEAD: function(config) {
config = OpenLayers.Util.extend(config, {method: "HEAD"});
return OpenLayers.Request.issue(config);
},
/**
* APIMethod: OPTIONS
* Send an HTTP OPTIONS request. Additional configuration properties are
* documented in the <issue> method, with the method property set
* to OPTIONS.
*
* Parameters:
* config - {Object} Object with properties for configuring the request.
* See the <issue> method for documentation of allowed properties.
* This object is modified and should not be reused.
*
* Returns:
* {XMLHttpRequest} Request object.
*/
OPTIONS: function(config) {
config = OpenLayers.Util.extend(config, {method: "OPTIONS"});
return OpenLayers.Request.issue(config);
}
});
/* ======================================================================
OpenLayers/Request/XMLHttpRequest.js
====================================================================== */
// XMLHttpRequest.js Copyright (C) 2010 Sergey Ilinsky (http://www.ilinsky.com)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @requires OpenLayers/Request.js
*/
(function () {
// Save reference to earlier defined object implementation (if any)
var oXMLHttpRequest = window.XMLHttpRequest;
// Define on browser type
var bGecko = !!window.controllers,
bIE = window.document.all && !window.opera,
bIE7 = bIE && window.navigator.userAgent.match(/MSIE 7.0/);
// Enables "XMLHttpRequest()" call next to "new XMLHttpReques()"
function fXMLHttpRequest() {
this._object = oXMLHttpRequest && !bIE7 ? new oXMLHttpRequest : new window.ActiveXObject("Microsoft.XMLHTTP");
this._listeners = [];
};
// Constructor
function cXMLHttpRequest() {
return new fXMLHttpRequest;
};
cXMLHttpRequest.prototype = fXMLHttpRequest.prototype;
// BUGFIX: Firefox with Firebug installed would break pages if not executed
if (bGecko && oXMLHttpRequest.wrapped)
cXMLHttpRequest.wrapped = oXMLHttpRequest.wrapped;
// Constants
cXMLHttpRequest.UNSENT = 0;
cXMLHttpRequest.OPENED = 1;
cXMLHttpRequest.HEADERS_RECEIVED = 2;
cXMLHttpRequest.LOADING = 3;
cXMLHttpRequest.DONE = 4;
// Public Properties
cXMLHttpRequest.prototype.readyState = cXMLHttpRequest.UNSENT;
cXMLHttpRequest.prototype.responseText = '';
cXMLHttpRequest.prototype.responseXML = null;
cXMLHttpRequest.prototype.status = 0;
cXMLHttpRequest.prototype.statusText = '';
// Priority proposal
cXMLHttpRequest.prototype.priority = "NORMAL";
// Instance-level Events Handlers
cXMLHttpRequest.prototype.onreadystatechange = null;
// Class-level Events Handlers
cXMLHttpRequest.onreadystatechange = null;
cXMLHttpRequest.onopen = null;
cXMLHttpRequest.onsend = null;
cXMLHttpRequest.onabort = null;
// Public Methods
cXMLHttpRequest.prototype.open = function(sMethod, sUrl, bAsync, sUser, sPassword) {
// Delete headers, required when object is reused
delete this._headers;
// When bAsync parameter value is omitted, use true as default
if (arguments.length < 3)
bAsync = true;
// Save async parameter for fixing Gecko bug with missing readystatechange in synchronous requests
this._async = bAsync;
// Set the onreadystatechange handler
var oRequest = this,
nState = this.readyState,
fOnUnload;
// BUGFIX: IE - memory leak on page unload (inter-page leak)
if (bIE && bAsync) {
fOnUnload = function() {
if (nState != cXMLHttpRequest.DONE) {
fCleanTransport(oRequest);
// Safe to abort here since onreadystatechange handler removed
oRequest.abort();
}
};
window.attachEvent("onunload", fOnUnload);
}
// Add method sniffer
if (cXMLHttpRequest.onopen)
cXMLHttpRequest.onopen.apply(this, arguments);
if (arguments.length > 4)
this._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
else
if (arguments.length > 3)
this._object.open(sMethod, sUrl, bAsync, sUser);
else
this._object.open(sMethod, sUrl, bAsync);
this.readyState = cXMLHttpRequest.OPENED;
fReadyStateChange(this);
this._object.onreadystatechange = function() {
if (bGecko && !bAsync)
return;
// Synchronize state
oRequest.readyState = oRequest._object.readyState;
//
fSynchronizeValues(oRequest);
// BUGFIX: Firefox fires unnecessary DONE when aborting
if (oRequest._aborted) {
// Reset readyState to UNSENT
oRequest.readyState = cXMLHttpRequest.UNSENT;
// Return now
return;
}
if (oRequest.readyState == cXMLHttpRequest.DONE) {
// Free up queue
delete oRequest._data;
/* if (bAsync)
fQueue_remove(oRequest);*/
//
fCleanTransport(oRequest);
// Uncomment this block if you need a fix for IE cache
/*
// BUGFIX: IE - cache issue
if (!oRequest._object.getResponseHeader("Date")) {
// Save object to cache
oRequest._cached = oRequest._object;
// Instantiate a new transport object
cXMLHttpRequest.call(oRequest);
// Re-send request
if (sUser) {
if (sPassword)
oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
else
oRequest._object.open(sMethod, sUrl, bAsync, sUser);
}
else
oRequest._object.open(sMethod, sUrl, bAsync);
oRequest._object.setRequestHeader("If-Modified-Since", oRequest._cached.getResponseHeader("Last-Modified") || new window.Date(0));
// Copy headers set
if (oRequest._headers)
for (var sHeader in oRequest._headers)
if (typeof oRequest._headers[sHeader] == "string") // Some frameworks prototype objects with functions
oRequest._object.setRequestHeader(sHeader, oRequest._headers[sHeader]);
oRequest._object.onreadystatechange = function() {
// Synchronize state
oRequest.readyState = oRequest._object.readyState;
if (oRequest._aborted) {
//
oRequest.readyState = cXMLHttpRequest.UNSENT;
// Return
return;
}
if (oRequest.readyState == cXMLHttpRequest.DONE) {
// Clean Object
fCleanTransport(oRequest);
// get cached request
if (oRequest.status == 304)
oRequest._object = oRequest._cached;
//
delete oRequest._cached;
//
fSynchronizeValues(oRequest);
//
fReadyStateChange(oRequest);
// BUGFIX: IE - memory leak in interrupted
if (bIE && bAsync)
window.detachEvent("onunload", fOnUnload);
}
};
oRequest._object.send(null);
// Return now - wait until re-sent request is finished
return;
};
*/
// BUGFIX: IE - memory leak in interrupted
if (bIE && bAsync)
window.detachEvent("onunload", fOnUnload);
}
// BUGFIX: Some browsers (Internet Explorer, Gecko) fire OPEN readystate twice
if (nState != oRequest.readyState)
fReadyStateChange(oRequest);
nState = oRequest.readyState;
}
};
function fXMLHttpRequest_send(oRequest) {
oRequest._object.send(oRequest._data);
// BUGFIX: Gecko - missing readystatechange calls in synchronous requests
if (bGecko && !oRequest._async) {
oRequest.readyState = cXMLHttpRequest.OPENED;
// Synchronize state
fSynchronizeValues(oRequest);
// Simulate missing states
while (oRequest.readyState < cXMLHttpRequest.DONE) {
oRequest.readyState++;
fReadyStateChange(oRequest);
// Check if we are aborted
if (oRequest._aborted)
return;
}
}
};
cXMLHttpRequest.prototype.send = function(vData) {
// Add method sniffer
if (cXMLHttpRequest.onsend)
cXMLHttpRequest.onsend.apply(this, arguments);
if (!arguments.length)
vData = null;
// BUGFIX: Safari - fails sending documents created/modified dynamically, so an explicit serialization required
// BUGFIX: IE - rewrites any custom mime-type to "text/xml" in case an XMLNode is sent
// BUGFIX: Gecko - fails sending Element (this is up to the implementation either to standard)
if (vData && vData.nodeType) {
vData = window.XMLSerializer ? new window.XMLSerializer().serializeToString(vData) : vData.xml;
if (!this._headers["Content-Type"])
this._object.setRequestHeader("Content-Type", "application/xml");
}
this._data = vData;
/*
// Add to queue
if (this._async)
fQueue_add(this);
else*/
fXMLHttpRequest_send(this);
};
cXMLHttpRequest.prototype.abort = function() {
// Add method sniffer
if (cXMLHttpRequest.onabort)
cXMLHttpRequest.onabort.apply(this, arguments);
// BUGFIX: Gecko - unnecessary DONE when aborting
if (this.readyState > cXMLHttpRequest.UNSENT)
this._aborted = true;
this._object.abort();
// BUGFIX: IE - memory leak
fCleanTransport(this);
this.readyState = cXMLHttpRequest.UNSENT;
delete this._data;
/* if (this._async)
fQueue_remove(this);*/
};
cXMLHttpRequest.prototype.getAllResponseHeaders = function() {
return this._object.getAllResponseHeaders();
};
cXMLHttpRequest.prototype.getResponseHeader = function(sName) {
return this._object.getResponseHeader(sName);
};
cXMLHttpRequest.prototype.setRequestHeader = function(sName, sValue) {
// BUGFIX: IE - cache issue
if (!this._headers)
this._headers = {};
this._headers[sName] = sValue;
return this._object.setRequestHeader(sName, sValue);
};
// EventTarget interface implementation
cXMLHttpRequest.prototype.addEventListener = function(sName, fHandler, bUseCapture) {
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture)
return;
// Add listener
this._listeners.push([sName, fHandler, bUseCapture]);
};
cXMLHttpRequest.prototype.removeEventListener = function(sName, fHandler, bUseCapture) {
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture)
break;
// Remove listener
if (oListener)
this._listeners.splice(nIndex, 1);
};
cXMLHttpRequest.prototype.dispatchEvent = function(oEvent) {
var oEventPseudo = {
'type': oEvent.type,
'target': this,
'currentTarget':this,
'eventPhase': 2,
'bubbles': oEvent.bubbles,
'cancelable': oEvent.cancelable,
'timeStamp': oEvent.timeStamp,
'stopPropagation': function() {}, // There is no flow
'preventDefault': function() {}, // There is no default action
'initEvent': function() {} // Original event object should be initialized
};
// Execute onreadystatechange
if (oEventPseudo.type == "readystatechange" && this.onreadystatechange)
(this.onreadystatechange.handleEvent || this.onreadystatechange).apply(this, [oEventPseudo]);
// Execute listeners
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
if (oListener[0] == oEventPseudo.type && !oListener[2])
(oListener[1].handleEvent || oListener[1]).apply(this, [oEventPseudo]);
};
//
cXMLHttpRequest.prototype.toString = function() {
return '[' + "object" + ' ' + "XMLHttpRequest" + ']';
};
cXMLHttpRequest.toString = function() {
return '[' + "XMLHttpRequest" + ']';
};
// Helper function
function fReadyStateChange(oRequest) {
// Sniffing code
if (cXMLHttpRequest.onreadystatechange)
cXMLHttpRequest.onreadystatechange.apply(oRequest);
// Fake event
oRequest.dispatchEvent({
'type': "readystatechange",
'bubbles': false,
'cancelable': false,
'timeStamp': new Date + 0
});
};
function fGetDocument(oRequest) {
var oDocument = oRequest.responseXML,
sResponse = oRequest.responseText;
// Try parsing responseText
if (bIE && sResponse && oDocument && !oDocument.documentElement && oRequest.getResponseHeader("Content-Type").match(/[^\/]+\/[^\+]+\+xml/)) {
oDocument = new window.ActiveXObject("Microsoft.XMLDOM");
oDocument.async = false;
oDocument.validateOnParse = false;
oDocument.loadXML(sResponse);
}
// Check if there is no error in document
if (oDocument)
if ((bIE && oDocument.parseError != 0) || !oDocument.documentElement || (oDocument.documentElement && oDocument.documentElement.tagName == "parsererror"))
return null;
return oDocument;
};
function fSynchronizeValues(oRequest) {
try { oRequest.responseText = oRequest._object.responseText; } catch (e) {}
try { oRequest.responseXML = fGetDocument(oRequest._object); } catch (e) {}
try { oRequest.status = oRequest._object.status; } catch (e) {}
try { oRequest.statusText = oRequest._object.statusText; } catch (e) {}
};
function fCleanTransport(oRequest) {
// BUGFIX: IE - memory leak (on-page leak)
oRequest._object.onreadystatechange = new window.Function;
};
/*
// Queue manager
var oQueuePending = {"CRITICAL":[],"HIGH":[],"NORMAL":[],"LOW":[],"LOWEST":[]},
aQueueRunning = [];
function fQueue_add(oRequest) {
oQueuePending[oRequest.priority in oQueuePending ? oRequest.priority : "NORMAL"].push(oRequest);
//
setTimeout(fQueue_process);
};
function fQueue_remove(oRequest) {
for (var nIndex = 0, bFound = false; nIndex < aQueueRunning.length; nIndex++)
if (bFound)
aQueueRunning[nIndex - 1] = aQueueRunning[nIndex];
else
if (aQueueRunning[nIndex] == oRequest)
bFound = true;
if (bFound)
aQueueRunning.length--;
//
setTimeout(fQueue_process);
};
function fQueue_process() {
if (aQueueRunning.length < 6) {
for (var sPriority in oQueuePending) {
if (oQueuePending[sPriority].length) {
var oRequest = oQueuePending[sPriority][0];
oQueuePending[sPriority] = oQueuePending[sPriority].slice(1);
//
aQueueRunning.push(oRequest);
// Send request
fXMLHttpRequest_send(oRequest);
break;
}
}
}
};
*/
// Internet Explorer 5.0 (missing apply)
if (!window.Function.prototype.apply) {
window.Function.prototype.apply = function(oRequest, oArguments) {
if (!oArguments)
oArguments = [];
oRequest.__func = this;
oRequest.__func(oArguments[0], oArguments[1], oArguments[2], oArguments[3], oArguments[4]);
delete oRequest.__func;
};
};
// Register new object with window
/**
* Class: OpenLayers.Request.XMLHttpRequest
* Standard-compliant (W3C) cross-browser implementation of the
* XMLHttpRequest object. From
* http://code.google.com/p/xmlhttprequest/.
*/
if (!OpenLayers.Request) {
/**
* This allows for OpenLayers/Request.js to be included
* before or after this script.
*/
OpenLayers.Request = {};
}
OpenLayers.Request.XMLHttpRequest = cXMLHttpRequest;
})();
/* ======================================================================
OpenLayers/Format/KML.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Date.js
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Geometry/Point.js
* @requires OpenLayers/Geometry/LineString.js
* @requires OpenLayers/Geometry/Polygon.js
* @requires OpenLayers/Geometry/Collection.js
* @requires OpenLayers/Request/XMLHttpRequest.js
* @requires OpenLayers/Projection.js
*/
/**
* Class: OpenLayers.Format.KML
* Read/Write KML. Create a new instance with the <OpenLayers.Format.KML>
* constructor.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.KML = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
kml: "http://www.opengis.net/kml/2.2",
gx: "http://www.google.com/kml/ext/2.2"
},
/**
* APIProperty: kmlns
* {String} KML Namespace to use. Defaults to 2.0 namespace.
*/
kmlns: "http://earth.google.com/kml/2.0",
/**
* APIProperty: placemarksDesc
* {String} Name of the placemarks. Default is "No description available".
*/
placemarksDesc: "No description available",
/**
* APIProperty: foldersName
* {String} Name of the folders. Default is "OpenLayers export".
* If set to null, no name element will be created.
*/
foldersName: "OpenLayers export",
/**
* APIProperty: foldersDesc
* {String} Description of the folders. Default is "Exported on [date]."
* If set to null, no description element will be created.
*/
foldersDesc: "Exported on " + new Date(),
/**
* APIProperty: extractAttributes
* {Boolean} Extract attributes from KML. Default is true.
* Extracting styleUrls requires this to be set to true
* Note that currently only Data and SimpleData
* elements are handled.
*/
extractAttributes: true,
/**
* APIProperty: kvpAttributes
* {Boolean} Only used if extractAttributes is true.
* If set to true, attributes will be simple
* key-value pairs, compatible with other formats,
* Any displayName elements will be ignored.
* If set to false, attributes will be objects,
* retaining any displayName elements, but not
* compatible with other formats. Any CDATA in
* displayName will be read in as a string value.
* Default is false.
*/
kvpAttributes: false,
/**
* Property: extractStyles
* {Boolean} Extract styles from KML. Default is false.
* Extracting styleUrls also requires extractAttributes to be
* set to true
*/
extractStyles: false,
/**
* APIProperty: extractTracks
* {Boolean} Extract gx:Track elements from Placemark elements. Default
* is false. If true, features will be generated for all points in
* all gx:Track elements. Features will have a when (Date) attribute
* based on when elements in the track. If tracks include angle
* elements, features will have heading, tilt, and roll attributes.
* If track point coordinates have three values, features will have
* an altitude attribute with the third coordinate value.
*/
extractTracks: false,
/**
* APIProperty: trackAttributes
* {Array} If <extractTracks> is true, points within gx:Track elements will
* be parsed as features with when, heading, tilt, and roll attributes.
* Any additional attribute names can be provided in <trackAttributes>.
*/
trackAttributes: null,
/**
* Property: internalns
* {String} KML Namespace to use -- defaults to the namespace of the
* Placemark node being parsed, but falls back to kmlns.
*/
internalns: null,
/**
* Property: features
* {Array} Array of features
*
*/
features: null,
/**
* Property: styles
* {Object} Storage of style objects
*
*/
styles: null,
/**
* Property: styleBaseUrl
* {String}
*/
styleBaseUrl: "",
/**
* Property: fetched
* {Object} Storage of KML URLs that have been fetched before
* in order to prevent reloading them.
*/
fetched: null,
/**
* APIProperty: maxDepth
* {Integer} Maximum depth for recursive loading external KML URLs
* Defaults to 0: do no external fetching
*/
maxDepth: 0,
/**
* Constructor: OpenLayers.Format.KML
* Create a new parser for KML.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
// compile regular expressions once instead of every time they are used
this.regExes = {
trimSpace: (/^\s*|\s*$/g),
removeSpace: (/\s*/g),
splitSpace: (/\s+/),
trimComma: (/\s*,\s*/g),
kmlColor: (/(\w{2})(\w{2})(\w{2})(\w{2})/),
kmlIconPalette: (/root:\/\/icons\/palette-(\d+)(\.\w+)/),
straightBracket: (/\$\[(.*?)\]/g)
};
// KML coordinates are always in longlat WGS84
this.externalProjection = new OpenLayers.Projection("EPSG:4326");
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
},
/**
* APIMethod: read
* Read data from a string, and return a list of features.
*
* Parameters:
* data - {String} or {DOMElement} data to read/parse.
*
* Returns:
* {Array(<OpenLayers.Feature.Vector>)} List of features.
*/
read: function(data) {
this.features = [];
this.styles = {};
this.fetched = {};
// Set default options
var options = {
depth: 0,
styleBaseUrl: this.styleBaseUrl
};
return this.parseData(data, options);
},
/**
* Method: parseData
* Read data from a string, and return a list of features.
*
* Parameters:
* data - {String} or {DOMElement} data to read/parse.
* options - {Object} Hash of options
*
* Returns:
* {Array(<OpenLayers.Feature.Vector>)} List of features.
*/
parseData: function(data, options) {
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
// Loop throught the following node types in this order and
// process the nodes found
var types = ["Link", "NetworkLink", "Style", "StyleMap", "Placemark"];
for(var i=0, len=types.length; i<len; ++i) {
var type = types[i];
var nodes = this.getElementsByTagNameNS(data, "*", type);
// skip to next type if no nodes are found
if(nodes.length == 0) {
continue;
}
switch (type.toLowerCase()) {
// Fetch external links
case "link":
case "networklink":
this.parseLinks(nodes, options);
break;
// parse style information
case "style":
if (this.extractStyles) {
this.parseStyles(nodes, options);
}
break;
case "stylemap":
if (this.extractStyles) {
this.parseStyleMaps(nodes, options);
}
break;
// parse features
case "placemark":
this.parseFeatures(nodes, options);
break;
}
}
return this.features;
},
/**
* Method: parseLinks
* Finds URLs of linked KML documents and fetches them
*
* Parameters:
* nodes - {Array} of {DOMElement} data to read/parse.
* options - {Object} Hash of options
*
*/
parseLinks: function(nodes, options) {
// Fetch external links <NetworkLink> and <Link>
// Don't do anything if we have reached our maximum depth for recursion
if (options.depth >= this.maxDepth) {
return false;
}
// increase depth
var newOptions = OpenLayers.Util.extend({}, options);
newOptions.depth++;
for(var i=0, len=nodes.length; i<len; i++) {
var href = this.parseProperty(nodes[i], "*", "href");
if(href && !this.fetched[href]) {
this.fetched[href] = true; // prevent reloading the same urls
var data = this.fetchLink(href);
if (data) {
this.parseData(data, newOptions);
}
}
}
},
/**
* Method: fetchLink
* Fetches a URL and returns the result
*
* Parameters:
* href - {String} url to be fetched
*
*/
fetchLink: function(href) {
var request = OpenLayers.Request.GET({url: href, async: false});
if (request) {
return request.responseText;
}
},
/**
* Method: parseStyles
* Parses <Style> nodes
*
* Parameters:
* nodes - {Array} of {DOMElement} data to read/parse.
* options - {Object} Hash of options
*
*/
parseStyles: function(nodes, options) {
for(var i=0, len=nodes.length; i<len; i++) {
var style = this.parseStyle(nodes[i]);
if(style) {
var styleName = (options.styleBaseUrl || "") + "#" + style.id;
this.styles[styleName] = style;
}
}
},
/**
* Method: parseKmlColor
* Parses a kml color (in 'aabbggrr' format) and returns the corresponding
* color and opacity or null if the color is invalid.
*
* Parameters:
* kmlColor - {String} a kml formated color
*
* Returns:
* {Object}
*/
parseKmlColor: function(kmlColor) {
var color = null;
if (kmlColor) {
var matches = kmlColor.match(this.regExes.kmlColor);
if (matches) {
color = {
color: '#' + matches[4] + matches[3] + matches[2],
opacity: parseInt(matches[1], 16) / 255
};
}
}
return color;
},
/**
* Method: parseStyle
* Parses the children of a <Style> node and builds the style hash
* accordingly
*
* Parameters:
* node - {DOMElement} <Style> node
*
*/
parseStyle: function(node) {
var style = {};
var types = ["LineStyle", "PolyStyle", "IconStyle", "BalloonStyle",
"LabelStyle"];
var type, styleTypeNode, nodeList, geometry, parser;
for(var i=0, len=types.length; i<len; ++i) {
type = types[i];
styleTypeNode = this.getElementsByTagNameNS(node, "*", type)[0];
if(!styleTypeNode) {
continue;
}
// only deal with first geometry of this type
switch (type.toLowerCase()) {
case "linestyle":
var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
var color = this.parseKmlColor(kmlColor);
if (color) {
style["strokeColor"] = color.color;
style["strokeOpacity"] = color.opacity;
}
var width = this.parseProperty(styleTypeNode, "*", "width");
if (width) {
style["strokeWidth"] = width;
}
break;
case "polystyle":
var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
var color = this.parseKmlColor(kmlColor);
if (color) {
style["fillOpacity"] = color.opacity;
style["fillColor"] = color.color;
}
// Check if fill is disabled
var fill = this.parseProperty(styleTypeNode, "*", "fill");
if (fill == "0") {
style["fillColor"] = "none";
}
// Check if outline is disabled
var outline = this.parseProperty(styleTypeNode, "*", "outline");
if (outline == "0") {
style["strokeWidth"] = "0";
}
break;
case "iconstyle":
// set scale
var scale = parseFloat(this.parseProperty(styleTypeNode,
"*", "scale") || 1);
// set default width and height of icon
var width = 32 * scale;
var height = 32 * scale;
var iconNode = this.getElementsByTagNameNS(styleTypeNode,
"*",
"Icon")[0];
if (iconNode) {
var href = this.parseProperty(iconNode, "*", "href");
if (href) {
var w = this.parseProperty(iconNode, "*", "w");
var h = this.parseProperty(iconNode, "*", "h");
// Settings for Google specific icons that are 64x64
// We set the width and height to 64 and halve the
// scale to prevent icons from being too big
var google = "http://maps.google.com/mapfiles/kml";
if (OpenLayers.String.startsWith(
href, google) && !w && !h) {
w = 64;
h = 64;
scale = scale / 2;
}
// if only dimension is defined, make sure the
// other one has the same value
w = w || h;
h = h || w;
if (w) {
width = parseInt(w) * scale;
}
if (h) {
height = parseInt(h) * scale;
}
// support for internal icons
// (/root://icons/palette-x.png)
// x and y tell the position on the palette:
// - in pixels
// - starting from the left bottom
// We translate that to a position in the list
// and request the appropriate icon from the
// google maps website
var matches = href.match(this.regExes.kmlIconPalette);
if (matches) {
var palette = matches[1];
var file_extension = matches[2];
var x = this.parseProperty(iconNode, "*", "x");
var y = this.parseProperty(iconNode, "*", "y");
var posX = x ? x/32 : 0;
var posY = y ? (7 - y/32) : 7;
var pos = posY * 8 + posX;
href = "http://maps.google.com/mapfiles/kml/pal"
+ palette + "/icon" + pos + file_extension;
}
style["graphicOpacity"] = 1; // fully opaque
style["externalGraphic"] = href;
}
}
// hotSpots define the offset for an Icon
var hotSpotNode = this.getElementsByTagNameNS(styleTypeNode,
"*",
"hotSpot")[0];
if (hotSpotNode) {
var x = parseFloat(hotSpotNode.getAttribute("x"));
var y = parseFloat(hotSpotNode.getAttribute("y"));
var xUnits = hotSpotNode.getAttribute("xunits");
if (xUnits == "pixels") {
style["graphicXOffset"] = -x * scale;
}
else if (xUnits == "insetPixels") {
style["graphicXOffset"] = -width + (x * scale);
}
else if (xUnits == "fraction") {
style["graphicXOffset"] = -width * x;
}
var yUnits = hotSpotNode.getAttribute("yunits");
if (yUnits == "pixels") {
style["graphicYOffset"] = -height + (y * scale) + 1;
}
else if (yUnits == "insetPixels") {
style["graphicYOffset"] = -(y * scale) + 1;
}
else if (yUnits == "fraction") {
style["graphicYOffset"] = -height * (1 - y) + 1;
}
}
style["graphicWidth"] = width;
style["graphicHeight"] = height;
break;
case "balloonstyle":
var balloonStyle = OpenLayers.Util.getXmlNodeValue(
styleTypeNode);
if (balloonStyle) {
style["balloonStyle"] = balloonStyle.replace(
this.regExes.straightBracket, "${$1}");
}
break;
case "labelstyle":
var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
var color = this.parseKmlColor(kmlColor);
if (color) {
style["fontColor"] = color.color;
style["fontOpacity"] = color.opacity;
}
break;
default:
}
}
// Some polygons have no line color, so we use the fillColor for that
if (!style["strokeColor"] && style["fillColor"]) {
style["strokeColor"] = style["fillColor"];
}
var id = node.getAttribute("id");
if (id && style) {
style.id = id;
}
return style;
},
/**
* Method: parseStyleMaps
* Parses <StyleMap> nodes, but only uses the 'normal' key
*
* Parameters:
* nodes - {Array} of {DOMElement} data to read/parse.
* options - {Object} Hash of options
*
*/
parseStyleMaps: function(nodes, options) {
// Only the default or "normal" part of the StyleMap is processed now
// To do the select or "highlight" bit, we'd need to change lots more
for(var i=0, len=nodes.length; i<len; i++) {
var node = nodes[i];
var pairs = this.getElementsByTagNameNS(node, "*",
"Pair");
var id = node.getAttribute("id");
for (var j=0, jlen=pairs.length; j<jlen; j++) {
var pair = pairs[j];
// Use the shortcut in the SLD format to quickly retrieve the
// value of a node. Maybe it's good to have a method in
// Format.XML to do this
var key = this.parseProperty(pair, "*", "key");
var styleUrl = this.parseProperty(pair, "*", "styleUrl");
if (styleUrl && key == "normal") {
this.styles[(options.styleBaseUrl || "") + "#" + id] =
this.styles[(options.styleBaseUrl || "") + styleUrl];
}
// TODO: implement the "select" part
//if (styleUrl && key == "highlight") {
//}
}
}
},
/**
* Method: parseFeatures
* Loop through all Placemark nodes and parse them.
* Will create a list of features
*
* Parameters:
* nodes - {Array} of {DOMElement} data to read/parse.
* options - {Object} Hash of options
*
*/
parseFeatures: function(nodes, options) {
var features = [];
for(var i=0, len=nodes.length; i<len; i++) {
var featureNode = nodes[i];
var feature = this.parseFeature.apply(this,[featureNode]) ;
if(feature) {
// Create reference to styleUrl
if (this.extractStyles && feature.attributes &&
feature.attributes.styleUrl) {
feature.style = this.getStyle(feature.attributes.styleUrl, options);
}
if (this.extractStyles) {
// Make sure that <Style> nodes within a placemark are
// processed as well
var inlineStyleNode = this.getElementsByTagNameNS(featureNode,
"*",
"Style")[0];
if (inlineStyleNode) {
var inlineStyle= this.parseStyle(inlineStyleNode);
if (inlineStyle) {
feature.style = OpenLayers.Util.extend(
feature.style, inlineStyle
);
}
}
}
// check if gx:Track elements should be parsed
if (this.extractTracks) {
var tracks = this.getElementsByTagNameNS(
featureNode, this.namespaces.gx, "Track"
);
if (tracks && tracks.length > 0) {
var track = tracks[0];
var container = {
features: [],
feature: feature
};
this.readNode(track, container);
if (container.features.length > 0) {
features.push.apply(features, container.features);
}
}
} else {
// add feature to list of features
features.push(feature);
}
} else {
throw "Bad Placemark: " + i;
}
}
// add new features to existing feature list
this.features = this.features.concat(features);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"kml": {
"when": function(node, container) {
container.whens.push(OpenLayers.Date.parse(
this.getChildValue(node)
));
},
"_trackPointAttribute": function(node, container) {
var name = node.nodeName.split(":").pop();
container.attributes[name].push(this.getChildValue(node));
}
},
"gx": {
"Track": function(node, container) {
var obj = {
whens: [],
points: [],
angles: []
};
if (this.trackAttributes) {
var name;
obj.attributes = {};
for (var i=0, ii=this.trackAttributes.length; i<ii; ++i) {
name = this.trackAttributes[i];
obj.attributes[name] = [];
if (!(name in this.readers.kml)) {
this.readers.kml[name] = this.readers.kml._trackPointAttribute;
}
}
}
this.readChildNodes(node, obj);
if (obj.whens.length !== obj.points.length) {
throw new Error("gx:Track with unequal number of when (" +
obj.whens.length + ") and gx:coord (" +
obj.points.length + ") elements.");
}
var hasAngles = obj.angles.length > 0;
if (hasAngles && obj.whens.length !== obj.angles.length) {
throw new Error("gx:Track with unequal number of when (" +
obj.whens.length + ") and gx:angles (" +
obj.angles.length + ") elements.");
}
var feature, point, angles;
for (var i=0, ii=obj.whens.length; i<ii; ++i) {
feature = container.feature.clone();
feature.fid = container.feature.fid || container.feature.id;
point = obj.points[i];
feature.geometry = point;
if ("z" in point) {
feature.attributes.altitude = point.z;
}
if (this.internalProjection && this.externalProjection) {
feature.geometry.transform(
this.externalProjection, this.internalProjection
);
}
if (this.trackAttributes) {
for (var j=0, jj=this.trackAttributes.length; j<jj; ++j) {
var name = this.trackAttributes[j];
feature.attributes[name] = obj.attributes[name][i];
}
}
feature.attributes.when = obj.whens[i];
feature.attributes.trackId = container.feature.id;
if (hasAngles) {
angles = obj.angles[i];
feature.attributes.heading = parseFloat(angles[0]);
feature.attributes.tilt = parseFloat(angles[1]);
feature.attributes.roll = parseFloat(angles[2]);
}
container.features.push(feature);
}
},
"coord": function(node, container) {
var str = this.getChildValue(node);
var coords = str.replace(this.regExes.trimSpace, "").split(/\s+/);
var point = new OpenLayers.Geometry.Point(coords[0], coords[1]);
if (coords.length > 2) {
point.z = parseFloat(coords[2]);
}
container.points.push(point);
},
"angles": function(node, container) {
var str = this.getChildValue(node);
var parts = str.replace(this.regExes.trimSpace, "").split(/\s+/);
container.angles.push(parts);
}
}
},
/**
* Method: parseFeature
* This function is the core of the KML parsing code in OpenLayers.
* It creates the geometries that are then attached to the returned
* feature, and calls parseAttributes() to get attribute data out.
*
* Parameters:
* node - {DOMElement}
*
* Returns:
* {<OpenLayers.Feature.Vector>} A vector feature.
*/
parseFeature: function(node) {
// only accept one geometry per feature - look for highest "order"
var order = ["MultiGeometry", "Polygon", "LineString", "Point"];
var type, nodeList, geometry, parser;
for(var i=0, len=order.length; i<len; ++i) {
type = order[i];
this.internalns = node.namespaceURI ?
node.namespaceURI : this.kmlns;
nodeList = this.getElementsByTagNameNS(node,
this.internalns, type);
if(nodeList.length > 0) {
// only deal with first geometry of this type
var parser = this.parseGeometry[type.toLowerCase()];
if(parser) {
geometry = parser.apply(this, [nodeList[0]]);
if (this.internalProjection && this.externalProjection) {
geometry.transform(this.externalProjection,
this.internalProjection);
}
} else {
throw new TypeError("Unsupported geometry type: " + type);
}
// stop looking for different geometry types
break;
}
}
// construct feature (optionally with attributes)
var attributes;
if(this.extractAttributes) {
attributes = this.parseAttributes(node);
}
var feature = new OpenLayers.Feature.Vector(geometry, attributes);
var fid = node.getAttribute("id") || node.getAttribute("name");
if(fid != null) {
feature.fid = fid;
}
return feature;
},
/**
* Method: getStyle
* Retrieves a style from a style hash using styleUrl as the key
* If the styleUrl doesn't exist yet, we try to fetch it
* Internet
*
* Parameters:
* styleUrl - {String} URL of style
* options - {Object} Hash of options
*
* Returns:
* {Object} - (reference to) Style hash
*/
getStyle: function(styleUrl, options) {
var styleBaseUrl = OpenLayers.Util.removeTail(styleUrl);
var newOptions = OpenLayers.Util.extend({}, options);
newOptions.depth++;
newOptions.styleBaseUrl = styleBaseUrl;
// Fetch remote Style URLs (if not fetched before)
if (!this.styles[styleUrl]
&& !OpenLayers.String.startsWith(styleUrl, "#")
&& newOptions.depth <= this.maxDepth
&& !this.fetched[styleBaseUrl] ) {
var data = this.fetchLink(styleBaseUrl);
if (data) {
this.parseData(data, newOptions);
}
}
// return requested style
var style = OpenLayers.Util.extend({}, this.styles[styleUrl]);
return style;
},
/**
* Property: parseGeometry
* Properties of this object are the functions that parse geometries based
* on their type.
*/
parseGeometry: {
/**
* Method: parseGeometry.point
* Given a KML node representing a point geometry, create an OpenLayers
* point geometry.
*
* Parameters:
* node - {DOMElement} A KML Point node.
*
* Returns:
* {<OpenLayers.Geometry.Point>} A point geometry.
*/
point: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.internalns,
"coordinates");
var coords = [];
if(nodeList.length > 0) {
var coordString = nodeList[0].firstChild.nodeValue;
coordString = coordString.replace(this.regExes.removeSpace, "");
coords = coordString.split(",");
}
var point = null;
if(coords.length > 1) {
// preserve third dimension
if(coords.length == 2) {
coords[2] = null;
}
point = new OpenLayers.Geometry.Point(coords[0], coords[1],
coords[2]);
} else {
throw "Bad coordinate string: " + coordString;
}
return point;
},
/**
* Method: parseGeometry.linestring
* Given a KML node representing a linestring geometry, create an
* OpenLayers linestring geometry.
*
* Parameters:
* node - {DOMElement} A KML LineString node.
*
* Returns:
* {<OpenLayers.Geometry.LineString>} A linestring geometry.
*/
linestring: function(node, ring) {
var nodeList = this.getElementsByTagNameNS(node, this.internalns,
"coordinates");
var line = null;
if(nodeList.length > 0) {
var coordString = this.getChildValue(nodeList[0]);
coordString = coordString.replace(this.regExes.trimSpace,
"");
coordString = coordString.replace(this.regExes.trimComma,
",");
var pointList = coordString.split(this.regExes.splitSpace);
var numPoints = pointList.length;
var points = new Array(numPoints);
var coords, numCoords;
for(var i=0; i<numPoints; ++i) {
coords = pointList[i].split(",");
numCoords = coords.length;
if(numCoords > 1) {
if(coords.length == 2) {
coords[2] = null;
}
points[i] = new OpenLayers.Geometry.Point(coords[0],
coords[1],
coords[2]);
} else {
throw "Bad LineString point coordinates: " +
pointList[i];
}
}
if(numPoints) {
if(ring) {
line = new OpenLayers.Geometry.LinearRing(points);
} else {
line = new OpenLayers.Geometry.LineString(points);
}
} else {
throw "Bad LineString coordinates: " + coordString;
}
}
return line;
},
/**
* Method: parseGeometry.polygon
* Given a KML node representing a polygon geometry, create an
* OpenLayers polygon geometry.
*
* Parameters:
* node - {DOMElement} A KML Polygon node.
*
* Returns:
* {<OpenLayers.Geometry.Polygon>} A polygon geometry.
*/
polygon: function(node) {
var nodeList = this.getElementsByTagNameNS(node, this.internalns,
"LinearRing");
var numRings = nodeList.length;
var components = new Array(numRings);
if(numRings > 0) {
// this assumes exterior ring first, inner rings after
var ring;
for(var i=0, len=nodeList.length; i<len; ++i) {
ring = this.parseGeometry.linestring.apply(this,
[nodeList[i], true]);
if(ring) {
components[i] = ring;
} else {
throw "Bad LinearRing geometry: " + i;
}
}
}
return new OpenLayers.Geometry.Polygon(components);
},
/**
* Method: parseGeometry.multigeometry
* Given a KML node representing a multigeometry, create an
* OpenLayers geometry collection.
*
* Parameters:
* node - {DOMElement} A KML MultiGeometry node.
*
* Returns:
* {<OpenLayers.Geometry.Collection>} A geometry collection.
*/
multigeometry: function(node) {
var child, parser;
var parts = [];
var children = node.childNodes;
for(var i=0, len=children.length; i<len; ++i ) {
child = children[i];
if(child.nodeType == 1) {
var type = (child.prefix) ?
child.nodeName.split(":")[1] :
child.nodeName;
var parser = this.parseGeometry[type.toLowerCase()];
if(parser) {
parts.push(parser.apply(this, [child]));
}
}
}
return new OpenLayers.Geometry.Collection(parts);
}
},
/**
* Method: parseAttributes
*
* Parameters:
* node - {DOMElement}
*
* Returns:
* {Object} An attributes object.
*/
parseAttributes: function(node) {
var attributes = {};
// Extended Data is parsed first.
var edNodes = node.getElementsByTagName("ExtendedData");
if (edNodes.length) {
attributes = this.parseExtendedData(edNodes[0]);
}
// assume attribute nodes are type 1 children with a type 3 or 4 child
var child, grandchildren, grandchild;
var children = node.childNodes;
for(var i=0, len=children.length; i<len; ++i) {
child = children[i];
if(child.nodeType == 1) {
grandchildren = child.childNodes;
if(grandchildren.length >= 1 && grandchildren.length <= 3) {
var grandchild;
switch (grandchildren.length) {
case 1:
grandchild = grandchildren[0];
break;
case 2:
var c1 = grandchildren[0];
var c2 = grandchildren[1];
grandchild = (c1.nodeType == 3 || c1.nodeType == 4) ?
c1 : c2;
break;
case 3:
default:
grandchild = grandchildren[1];
break;
}
if(grandchild.nodeType == 3 || grandchild.nodeType == 4) {
var name = (child.prefix) ?
child.nodeName.split(":")[1] :
child.nodeName;
var value = OpenLayers.Util.getXmlNodeValue(grandchild);
if (value) {
value = value.replace(this.regExes.trimSpace, "");
attributes[name] = value;
}
}
}
}
}
return attributes;
},
/**
* Method: parseExtendedData
* Parse ExtendedData from KML. Limited support for schemas/datatypes.
* See http://code.google.com/apis/kml/documentation/kmlreference.html#extendeddata
* for more information on extendeddata.
*/
parseExtendedData: function(node) {
var attributes = {};
var i, len, data, key;
var dataNodes = node.getElementsByTagName("Data");
for (i = 0, len = dataNodes.length; i < len; i++) {
data = dataNodes[i];
key = data.getAttribute("name");
var ed = {};
var valueNode = data.getElementsByTagName("value");
if (valueNode.length) {
ed['value'] = this.getChildValue(valueNode[0]);
}
if (this.kvpAttributes) {
attributes[key] = ed['value'];
} else {
var nameNode = data.getElementsByTagName("displayName");
if (nameNode.length) {
ed['displayName'] = this.getChildValue(nameNode[0]);
}
attributes[key] = ed;
}
}
var simpleDataNodes = node.getElementsByTagName("SimpleData");
for (i = 0, len = simpleDataNodes.length; i < len; i++) {
var ed = {};
data = simpleDataNodes[i];
key = data.getAttribute("name");
ed['value'] = this.getChildValue(data);
if (this.kvpAttributes) {
attributes[key] = ed['value'];
} else {
ed['displayName'] = key;
attributes[key] = ed;
}
}
return attributes;
},
/**
* Method: parseProperty
* Convenience method to find a node and return its value
*
* Parameters:
* xmlNode - {<DOMElement>}
* namespace - {String} namespace of the node to find
* tagName - {String} name of the property to parse
*
* Returns:
* {String} The value for the requested property (defaults to null)
*/
parseProperty: function(xmlNode, namespace, tagName) {
var value;
var nodeList = this.getElementsByTagNameNS(xmlNode, namespace, tagName);
try {
value = OpenLayers.Util.getXmlNodeValue(nodeList[0]);
} catch(e) {
value = null;
}
return value;
},
/**
* APIMethod: write
* Accept Feature Collection, and return a string.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)} An array of features.
*
* Returns:
* {String} A KML string.
*/
write: function(features) {
if(!(OpenLayers.Util.isArray(features))) {
features = [features];
}
var kml = this.createElementNS(this.kmlns, "kml");
var folder = this.createFolderXML();
for(var i=0, len=features.length; i<len; ++i) {
folder.appendChild(this.createPlacemarkXML(features[i]));
}
kml.appendChild(folder);
return OpenLayers.Format.XML.prototype.write.apply(this, [kml]);
},
/**
* Method: createFolderXML
* Creates and returns a KML folder node
*
* Returns:
* {DOMElement}
*/
createFolderXML: function() {
// Folder
var folder = this.createElementNS(this.kmlns, "Folder");
// Folder name
if (this.foldersName) {
var folderName = this.createElementNS(this.kmlns, "name");
var folderNameText = this.createTextNode(this.foldersName);
folderName.appendChild(folderNameText);
folder.appendChild(folderName);
}
// Folder description
if (this.foldersDesc) {
var folderDesc = this.createElementNS(this.kmlns, "description");
var folderDescText = this.createTextNode(this.foldersDesc);
folderDesc.appendChild(folderDescText);
folder.appendChild(folderDesc);
}
return folder;
},
/**
* Method: createPlacemarkXML
* Creates and returns a KML placemark node representing the given feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*
* Returns:
* {DOMElement}
*/
createPlacemarkXML: function(feature) {
// Placemark name
var placemarkName = this.createElementNS(this.kmlns, "name");
var label = (feature.style && feature.style.label) ? feature.style.label : feature.id;
var name = feature.attributes.name || label;
placemarkName.appendChild(this.createTextNode(name));
// Placemark description
var placemarkDesc = this.createElementNS(this.kmlns, "description");
var desc = feature.attributes.description || this.placemarksDesc;
placemarkDesc.appendChild(this.createTextNode(desc));
// Placemark
var placemarkNode = this.createElementNS(this.kmlns, "Placemark");
if(feature.fid != null) {
placemarkNode.setAttribute("id", feature.fid);
}
placemarkNode.appendChild(placemarkName);
placemarkNode.appendChild(placemarkDesc);
// Geometry node (Point, LineString, etc. nodes)
var geometryNode = this.buildGeometryNode(feature.geometry);
placemarkNode.appendChild(geometryNode);
// output attributes as extendedData
if (feature.attributes) {
var edNode = this.buildExtendedData(feature.attributes);
if (edNode) {
placemarkNode.appendChild(edNode);
}
}
return placemarkNode;
},
/**
* Method: buildGeometryNode
* Builds and returns a KML geometry node with the given geometry.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement}
*/
buildGeometryNode: function(geometry) {
var className = geometry.CLASS_NAME;
var type = className.substring(className.lastIndexOf(".") + 1);
var builder = this.buildGeometry[type.toLowerCase()];
var node = null;
if(builder) {
node = builder.apply(this, [geometry]);
}
return node;
},
/**
* Property: buildGeometry
* Object containing methods to do the actual geometry node building
* based on geometry type.
*/
buildGeometry: {
// TBD: Anybody care about namespace aliases here (these nodes have
// no prefixes)?
/**
* Method: buildGeometry.point
* Given an OpenLayers point geometry, create a KML point.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Point>} A point geometry.
*
* Returns:
* {DOMElement} A KML point node.
*/
point: function(geometry) {
var kml = this.createElementNS(this.kmlns, "Point");
kml.appendChild(this.buildCoordinatesNode(geometry));
return kml;
},
/**
* Method: buildGeometry.multipoint
* Given an OpenLayers multipoint geometry, create a KML
* GeometryCollection.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Point>} A multipoint geometry.
*
* Returns:
* {DOMElement} A KML GeometryCollection node.
*/
multipoint: function(geometry) {
return this.buildGeometry.collection.apply(this, [geometry]);
},
/**
* Method: buildGeometry.linestring
* Given an OpenLayers linestring geometry, create a KML linestring.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.LineString>} A linestring geometry.
*
* Returns:
* {DOMElement} A KML linestring node.
*/
linestring: function(geometry) {
var kml = this.createElementNS(this.kmlns, "LineString");
kml.appendChild(this.buildCoordinatesNode(geometry));
return kml;
},
/**
* Method: buildGeometry.multilinestring
* Given an OpenLayers multilinestring geometry, create a KML
* GeometryCollection.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Point>} A multilinestring geometry.
*
* Returns:
* {DOMElement} A KML GeometryCollection node.
*/
multilinestring: function(geometry) {
return this.buildGeometry.collection.apply(this, [geometry]);
},
/**
* Method: buildGeometry.linearring
* Given an OpenLayers linearring geometry, create a KML linearring.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.LinearRing>} A linearring geometry.
*
* Returns:
* {DOMElement} A KML linearring node.
*/
linearring: function(geometry) {
var kml = this.createElementNS(this.kmlns, "LinearRing");
kml.appendChild(this.buildCoordinatesNode(geometry));
return kml;
},
/**
* Method: buildGeometry.polygon
* Given an OpenLayers polygon geometry, create a KML polygon.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Polygon>} A polygon geometry.
*
* Returns:
* {DOMElement} A KML polygon node.
*/
polygon: function(geometry) {
var kml = this.createElementNS(this.kmlns, "Polygon");
var rings = geometry.components;
var ringMember, ringGeom, type;
for(var i=0, len=rings.length; i<len; ++i) {
type = (i==0) ? "outerBoundaryIs" : "innerBoundaryIs";
ringMember = this.createElementNS(this.kmlns, type);
ringGeom = this.buildGeometry.linearring.apply(this,
[rings[i]]);
ringMember.appendChild(ringGeom);
kml.appendChild(ringMember);
}
return kml;
},
/**
* Method: buildGeometry.multipolygon
* Given an OpenLayers multipolygon geometry, create a KML
* GeometryCollection.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Point>} A multipolygon geometry.
*
* Returns:
* {DOMElement} A KML GeometryCollection node.
*/
multipolygon: function(geometry) {
return this.buildGeometry.collection.apply(this, [geometry]);
},
/**
* Method: buildGeometry.collection
* Given an OpenLayers geometry collection, create a KML MultiGeometry.
*
* Parameters:
* geometry - {<OpenLayers.Geometry.Collection>} A geometry collection.
*
* Returns:
* {DOMElement} A KML MultiGeometry node.
*/
collection: function(geometry) {
var kml = this.createElementNS(this.kmlns, "MultiGeometry");
var child;
for(var i=0, len=geometry.components.length; i<len; ++i) {
child = this.buildGeometryNode.apply(this,
[geometry.components[i]]);
if(child) {
kml.appendChild(child);
}
}
return kml;
}
},
/**
* Method: buildCoordinatesNode
* Builds and returns the KML coordinates node with the given geometry
* <coordinates>...</coordinates>
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement}
*/
buildCoordinatesNode: function(geometry) {
var coordinatesNode = this.createElementNS(this.kmlns, "coordinates");
var path;
var points = geometry.components;
if(points) {
// LineString or LinearRing
var point;
var numPoints = points.length;
var parts = new Array(numPoints);
for(var i=0; i<numPoints; ++i) {
point = points[i];
parts[i] = this.buildCoordinates(point);
}
path = parts.join(" ");
} else {
// Point
path = this.buildCoordinates(geometry);
}
var txtNode = this.createTextNode(path);
coordinatesNode.appendChild(txtNode);
return coordinatesNode;
},
/**
* Method: buildCoordinates
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns
* {String} a coordinate pair
*/
buildCoordinates: function(point) {
if (this.internalProjection && this.externalProjection) {
point = point.clone();
point.transform(this.internalProjection,
this.externalProjection);
}
return point.x + "," + point.y;
},
/**
* Method: buildExtendedData
*
* Parameters:
* attributes - {Object}
*
* Returns
* {DOMElement} A KML ExtendedData node or {null} if no attributes.
*/
buildExtendedData: function(attributes) {
var extendedData = this.createElementNS(this.kmlns, "ExtendedData");
for (var attributeName in attributes) {
// empty, name, description, styleUrl attributes ignored
if (attributes[attributeName] && attributeName != "name" && attributeName != "description" && attributeName != "styleUrl") {
var data = this.createElementNS(this.kmlns, "Data");
data.setAttribute("name", attributeName);
var value = this.createElementNS(this.kmlns, "value");
if (typeof attributes[attributeName] == "object") {
// cater for object attributes with 'value' properties
// other object properties will output an empty node
if (attributes[attributeName].value) {
value.appendChild(this.createTextNode(attributes[attributeName].value));
}
if (attributes[attributeName].displayName) {
var displayName = this.createElementNS(this.kmlns, "displayName");
// displayName always written as CDATA
displayName.appendChild(this.getXMLDoc().createCDATASection(attributes[attributeName].displayName));
data.appendChild(displayName);
}
} else {
value.appendChild(this.createTextNode(attributes[attributeName]));
}
data.appendChild(value);
extendedData.appendChild(data);
}
}
if (this.isSimpleContent(extendedData)) {
return null;
} else {
return extendedData;
}
},
CLASS_NAME: "OpenLayers.Format.KML"
});
/* ======================================================================
OpenLayers/Protocol/WFS/v1.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Protocol/WFS.js
*/
/**
* Class: OpenLayers.Protocol.WFS.v1
* Abstract class for for v1.0.0 and v1.1.0 protocol.
*
* Inherits from:
* - <OpenLayers.Protocol>
*/
OpenLayers.Protocol.WFS.v1 = OpenLayers.Class(OpenLayers.Protocol, {
/**
* Property: version
* {String} WFS version number.
*/
version: null,
/**
* Property: srsName
* {String} Name of spatial reference system. Default is "EPSG:4326".
*/
srsName: "EPSG:4326",
/**
* Property: featureType
* {String} Local feature typeName.
*/
featureType: null,
/**
* Property: featureNS
* {String} Feature namespace.
*/
featureNS: null,
/**
* Property: geometryName
* {String} Name of the geometry attribute for features. Default is
* "the_geom" for WFS <version> 1.0, and null for higher versions.
*/
geometryName: "the_geom",
/**
* Property: maxFeatures
* {Integer} Optional maximum number of features to retrieve.
*/
/**
* Property: schema
* {String} Optional schema location that will be included in the
* schemaLocation attribute value. Note that the feature type schema
* is required for a strict XML validator (on transactions with an
* insert for example), but is *not* required by the WFS specification
* (since the server is supposed to know about feature type schemas).
*/
schema: null,
/**
* Property: featurePrefix
* {String} Namespace alias for feature type. Default is "feature".
*/
featurePrefix: "feature",
/**
* Property: formatOptions
* {Object} Optional options for the format. If a format is not provided,
* this property can be used to extend the default format options.
*/
formatOptions: null,
/**
* Property: readFormat
* {<OpenLayers.Format>} For WFS requests it is possible to get a
* different output format than GML. In that case, we cannot parse
* the response with the default format (WFST) and we need a different
* format for reading.
*/
readFormat: null,
/**
* Property: readOptions
* {Object} Optional object to pass to format's read.
*/
readOptions: null,
/**
* Constructor: OpenLayers.Protocol.WFS
* A class for giving layers WFS protocol.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Valid options properties:
* url - {String} URL to send requests to (required).
* featureType - {String} Local (without prefix) feature typeName (required).
* featureNS - {String} Feature namespace (required, but can be autodetected
* during the first query if GML is used as readFormat and
* featurePrefix is provided and matches the prefix used by the server
* for this featureType).
* featurePrefix - {String} Feature namespace alias (optional - only used
* for writing if featureNS is provided). Default is 'feature'.
* geometryName - {String} Name of geometry attribute. The default is
* 'the_geom' for WFS <version> 1.0, and null for higher versions. If
* null, it will be set to the name of the first geometry found in the
* first read operation.
* multi - {Boolean} If set to true, geometries will be casted to Multi
* geometries before they are written in a transaction. No casting will
* be done when reading features.
*/
initialize: function(options) {
OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
if(!options.format) {
this.format = OpenLayers.Format.WFST(OpenLayers.Util.extend({
version: this.version,
featureType: this.featureType,
featureNS: this.featureNS,
featurePrefix: this.featurePrefix,
geometryName: this.geometryName,
srsName: this.srsName,
schema: this.schema
}, this.formatOptions));
}
if (!options.geometryName && parseFloat(this.format.version) > 1.0) {
this.setGeometryName(null);
}
},
/**
* APIMethod: destroy
* Clean up the protocol.
*/
destroy: function() {
if(this.options && !this.options.format) {
this.format.destroy();
}
this.format = null;
OpenLayers.Protocol.prototype.destroy.apply(this);
},
/**
* APIMethod: read
* Construct a request for reading new features. Since WFS splits the
* basic CRUD operations into GetFeature requests (for read) and
* Transactions (for all others), this method does not make use of the
* format's read method (that is only about reading transaction
* responses).
*
* Parameters:
* options - {Object} Options for the read operation, in addition to the
* options set on the instance (options set here will take precedence).
*
* To use a configured protocol to get e.g. a WFS hit count, applications
* could do the following:
*
* (code)
* protocol.read({
* readOptions: {output: "object"},
* resultType: "hits",
* maxFeatures: null,
* callback: function(resp) {
* // process resp.numberOfFeatures here
* }
* });
* (end)
*
* To use a configured protocol to use WFS paging (if supported by the
* server), applications could do the following:
*
* (code)
* protocol.read({
* startIndex: 0,
* count: 50
* });
* (end)
*
* To limit the attributes returned by the GetFeature request, applications
* can use the propertyNames option to specify the properties to include in
* the response:
*
* (code)
* protocol.read({
* propertyNames: ["DURATION", "INTENSITY"]
* });
* (end)
*/
read: function(options) {
OpenLayers.Protocol.prototype.read.apply(this, arguments);
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options || {});
var response = new OpenLayers.Protocol.Response({requestType: "read"});
var data = OpenLayers.Format.XML.prototype.write.apply(
this.format, [this.format.writeNode("wfs:GetFeature", options)]
);
response.priv = OpenLayers.Request.POST({
url: options.url,
callback: this.createCallback(this.handleRead, response, options),
params: options.params,
headers: options.headers,
data: data
});
return response;
},
/**
* APIMethod: setFeatureType
* Change the feature type on the fly.
*
* Parameters:
* featureType - {String} Local (without prefix) feature typeName.
*/
setFeatureType: function(featureType) {
this.featureType = featureType;
this.format.featureType = featureType;
},
/**
* APIMethod: setGeometryName
* Sets the geometryName option after instantiation.
*
* Parameters:
* geometryName - {String} Name of geometry attribute.
*/
setGeometryName: function(geometryName) {
this.geometryName = geometryName;
this.format.geometryName = geometryName;
},
/**
* Method: handleRead
* Deal with response from the read request.
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>} The response object to pass
* to the user callback.
* options - {Object} The user options passed to the read call.
*/
handleRead: function(response, options) {
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options);
if(options.callback) {
var request = response.priv;
if(request.status >= 200 && request.status < 300) {
// success
var result = this.parseResponse(request, options.readOptions);
if (result && result.success !== false) {
if (options.readOptions && options.readOptions.output == "object") {
OpenLayers.Util.extend(response, result);
} else {
response.features = result;
}
response.code = OpenLayers.Protocol.Response.SUCCESS;
} else {
// failure (service exception)
response.code = OpenLayers.Protocol.Response.FAILURE;
response.error = result;
}
} else {
// failure
response.code = OpenLayers.Protocol.Response.FAILURE;
}
options.callback.call(options.scope, response);
}
},
/**
* Method: parseResponse
* Read HTTP response body and return features
*
* Parameters:
* request - {XMLHttpRequest} The request object
* options - {Object} Optional object to pass to format's read
*
* Returns:
* {Object} or {Array({<OpenLayers.Feature.Vector>})} or
* {<OpenLayers.Feature.Vector>}
* An object with a features property, an array of features or a single
* feature.
*/
parseResponse: function(request, options) {
var doc = request.responseXML;
if(!doc || !doc.documentElement) {
doc = request.responseText;
}
if(!doc || doc.length <= 0) {
return null;
}
var result = (this.readFormat !== null) ? this.readFormat.read(doc) :
this.format.read(doc, options);
if (!this.featureNS) {
var format = this.readFormat || this.format;
this.featureNS = format.featureNS;
// no need to auto-configure again on subsequent reads
format.autoConfig = false;
if (!this.geometryName) {
this.setGeometryName(format.geometryName);
}
}
return result;
},
/**
* Method: commit
* Given a list of feature, assemble a batch request for update, create,
* and delete transactions. A commit call on the prototype amounts
* to writing a WFS transaction - so the write method on the format
* is used.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)}
* options - {Object}
*
* Valid options properties:
* nativeElements - {Array({Object})} Array of objects with information for writing
* out <Native> elements, these objects have vendorId, safeToIgnore and
* value properties. The <Native> element is intended to allow access to
* vendor specific capabilities of any particular web feature server or
* datastore.
*
* Returns:
* {<OpenLayers.Protocol.Response>} A response object with a features
* property containing any insertIds and a priv property referencing
* the XMLHttpRequest object.
*/
commit: function(features, options) {
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options);
var response = new OpenLayers.Protocol.Response({
requestType: "commit",
reqFeatures: features
});
response.priv = OpenLayers.Request.POST({
url: options.url,
headers: options.headers,
data: this.format.write(features, options),
callback: this.createCallback(this.handleCommit, response, options)
});
return response;
},
/**
* Method: handleCommit
* Called when the commit request returns.
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>} The response object to pass
* to the user callback.
* options - {Object} The user options passed to the commit call.
*/
handleCommit: function(response, options) {
if(options.callback) {
var request = response.priv;
// ensure that we have an xml doc
var data = request.responseXML;
if(!data || !data.documentElement) {
data = request.responseText;
}
var obj = this.format.read(data) || {};
response.insertIds = obj.insertIds || [];
if (obj.success) {
response.code = OpenLayers.Protocol.Response.SUCCESS;
} else {
response.code = OpenLayers.Protocol.Response.FAILURE;
response.error = obj;
}
options.callback.call(options.scope, response);
}
},
/**
* Method: filterDelete
* Send a request that deletes all features by their filter.
*
* Parameters:
* filter - {<OpenLayers.Filter>} filter
*/
filterDelete: function(filter, options) {
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options);
var response = new OpenLayers.Protocol.Response({
requestType: "commit"
});
var root = this.format.createElementNSPlus("wfs:Transaction", {
attributes: {
service: "WFS",
version: this.version
}
});
var deleteNode = this.format.createElementNSPlus("wfs:Delete", {
attributes: {
typeName: (options.featureNS ? this.featurePrefix + ":" : "") +
options.featureType
}
});
if(options.featureNS) {
deleteNode.setAttribute("xmlns:" + this.featurePrefix, options.featureNS);
}
var filterNode = this.format.writeNode("ogc:Filter", filter);
deleteNode.appendChild(filterNode);
root.appendChild(deleteNode);
var data = OpenLayers.Format.XML.prototype.write.apply(
this.format, [root]
);
return OpenLayers.Request.POST({
url: this.url,
callback : options.callback || function(){},
data: data
});
},
/**
* Method: abort
* Abort an ongoing request, the response object passed to
* this method must come from this protocol (as a result
* of a read, or commit operation).
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>}
*/
abort: function(response) {
if (response) {
response.priv.abort();
}
},
CLASS_NAME: "OpenLayers.Protocol.WFS.v1"
});
/* ======================================================================
OpenLayers/Handler/Feature.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
*/
/**
* Class: OpenLayers.Handler.Feature
* Handler to respond to mouse events related to a drawn feature. Callbacks
* with the following keys will be notified of the following events
* associated with features: click, clickout, over, out, and dblclick.
*
* This handler stops event propagation for mousedown and mouseup if those
* browser events target features that can be selected.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Feature = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: EVENTMAP
* {Object} A object mapping the browser events to objects with callback
* keys for in and out.
*/
EVENTMAP: {
'click': {'in': 'click', 'out': 'clickout'},
'mousemove': {'in': 'over', 'out': 'out'},
'dblclick': {'in': 'dblclick', 'out': null},
'mousedown': {'in': null, 'out': null},
'mouseup': {'in': null, 'out': null},
'touchstart': {'in': 'click', 'out': 'clickout'}
},
/**
* Property: feature
* {<OpenLayers.Feature.Vector>} The last feature that was hovered.
*/
feature: null,
/**
* Property: lastFeature
* {<OpenLayers.Feature.Vector>} The last feature that was handled.
*/
lastFeature: null,
/**
* Property: down
* {<OpenLayers.Pixel>} The location of the last mousedown.
*/
down: null,
/**
* Property: up
* {<OpenLayers.Pixel>} The location of the last mouseup.
*/
up: null,
/**
* Property: clickTolerance
* {Number} The number of pixels the mouse can move between mousedown
* and mouseup for the event to still be considered a click.
* Dragging the map should not trigger the click and clickout callbacks
* unless the map is moved by less than this tolerance. Defaults to 4.
*/
clickTolerance: 4,
/**
* Property: geometryTypes
* To restrict dragging to a limited set of geometry types, send a list
* of strings corresponding to the geometry class names.
*
* @type Array(String)
*/
geometryTypes: null,
/**
* Property: stopClick
* {Boolean} If stopClick is set to true, handled clicks do not
* propagate to other click listeners. Otherwise, handled clicks
* do propagate. Unhandled clicks always propagate, whatever the
* value of stopClick. Defaults to true.
*/
stopClick: true,
/**
* Property: stopDown
* {Boolean} If stopDown is set to true, handled mousedowns do not
* propagate to other mousedown listeners. Otherwise, handled
* mousedowns do propagate. Unhandled mousedowns always propagate,
* whatever the value of stopDown. Defaults to true.
*/
stopDown: true,
/**
* Property: stopUp
* {Boolean} If stopUp is set to true, handled mouseups do not
* propagate to other mouseup listeners. Otherwise, handled mouseups
* do propagate. Unhandled mouseups always propagate, whatever the
* value of stopUp. Defaults to false.
*/
stopUp: false,
/**
* Constructor: OpenLayers.Handler.Feature
*
* Parameters:
* control - {<OpenLayers.Control>}
* layer - {<OpenLayers.Layer.Vector>}
* callbacks - {Object} An object with a 'over' property whos value is
* a function to be called when the mouse is over a feature. The
* callback should expect to recieve a single argument, the feature.
* options - {Object}
*/
initialize: function(control, layer, callbacks, options) {
OpenLayers.Handler.prototype.initialize.apply(this, [control, callbacks, options]);
this.layer = layer;
},
/**
* Method: touchstart
* Handle touchstart events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchstart: function(evt) {
this.startTouch();
return OpenLayers.Event.isMultiTouch(evt) ?
true : this.mousedown(evt);
},
/**
* Method: touchmove
* Handle touchmove events. We just prevent the browser default behavior,
* for Android Webkit not to select text when moving the finger after
* selecting a feature.
*
* Parameters:
* evt - {Event}
*/
touchmove: function(evt) {
OpenLayers.Event.preventDefault(evt);
},
/**
* Method: mousedown
* Handle mouse down. Stop propagation if a feature is targeted by this
* event (stops map dragging during feature selection).
*
* Parameters:
* evt - {Event}
*/
mousedown: function(evt) {
// Feature selection is only done with a left click. Other handlers may stop the
// propagation of left-click mousedown events but not right-click mousedown events.
// This mismatch causes problems when comparing the location of the down and up
// events in the click function so it is important ignore right-clicks.
if (OpenLayers.Event.isLeftClick(evt) || OpenLayers.Event.isSingleTouch(evt)) {
this.down = evt.xy;
}
return this.handle(evt) ? !this.stopDown : true;
},
/**
* Method: mouseup
* Handle mouse up. Stop propagation if a feature is targeted by this
* event.
*
* Parameters:
* evt - {Event}
*/
mouseup: function(evt) {
this.up = evt.xy;
return this.handle(evt) ? !this.stopUp : true;
},
/**
* Method: click
* Handle click. Call the "click" callback if click on a feature,
* or the "clickout" callback if click outside any feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
click: function(evt) {
return this.handle(evt) ? !this.stopClick : true;
},
/**
* Method: mousemove
* Handle mouse moves. Call the "over" callback if moving in to a feature,
* or the "out" callback if moving out of a feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
mousemove: function(evt) {
if (!this.callbacks['over'] && !this.callbacks['out']) {
return true;
}
this.handle(evt);
return true;
},
/**
* Method: dblclick
* Handle dblclick. Call the "dblclick" callback if dblclick on a feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
dblclick: function(evt) {
return !this.handle(evt);
},
/**
* Method: geometryTypeMatches
* Return true if the geometry type of the passed feature matches
* one of the geometry types in the geometryTypes array.
*
* Parameters:
* feature - {<OpenLayers.Vector.Feature>}
*
* Returns:
* {Boolean}
*/
geometryTypeMatches: function(feature) {
return this.geometryTypes == null ||
OpenLayers.Util.indexOf(this.geometryTypes,
feature.geometry.CLASS_NAME) > -1;
},
/**
* Method: handle
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} The event occurred over a relevant feature.
*/
handle: function(evt) {
if(this.feature && !this.feature.layer) {
// feature has been destroyed
this.feature = null;
}
var type = evt.type;
var handled = false;
var previouslyIn = !!(this.feature); // previously in a feature
var click = (type == "click" || type == "dblclick" || type == "touchstart");
this.feature = this.layer.getFeatureFromEvent(evt);
if(this.feature && !this.feature.layer) {
// feature has been destroyed
this.feature = null;
}
if(this.lastFeature && !this.lastFeature.layer) {
// last feature has been destroyed
this.lastFeature = null;
}
if(this.feature) {
if(type === "touchstart") {
// stop the event to prevent Android Webkit from
// "flashing" the map div
OpenLayers.Event.preventDefault(evt);
}
var inNew = (this.feature != this.lastFeature);
if(this.geometryTypeMatches(this.feature)) {
// in to a feature
if(previouslyIn && inNew) {
// out of last feature and in to another
if(this.lastFeature) {
this.triggerCallback(type, 'out', [this.lastFeature]);
}
this.triggerCallback(type, 'in', [this.feature]);
} else if(!previouslyIn || click) {
// in feature for the first time
this.triggerCallback(type, 'in', [this.feature]);
}
this.lastFeature = this.feature;
handled = true;
} else {
// not in to a feature
if(this.lastFeature && (previouslyIn && inNew || click)) {
// out of last feature for the first time
this.triggerCallback(type, 'out', [this.lastFeature]);
}
// next time the mouse goes in a feature whose geometry type
// doesn't match we don't want to call the 'out' callback
// again, so let's set this.feature to null so that
// previouslyIn will evaluate to false the next time
// we enter handle. Yes, a bit hackish...
this.feature = null;
}
} else if(this.lastFeature && (previouslyIn || click)) {
this.triggerCallback(type, 'out', [this.lastFeature]);
}
return handled;
},
/**
* Method: triggerCallback
* Call the callback keyed in the event map with the supplied arguments.
* For click and clickout, the <clickTolerance> is checked first.
*
* Parameters:
* type - {String}
*/
triggerCallback: function(type, mode, args) {
var key = this.EVENTMAP[type][mode];
if(key) {
if(type == 'click' && this.up && this.down) {
// for click/clickout, only trigger callback if tolerance is met
var dpx = Math.sqrt(
Math.pow(this.up.x - this.down.x, 2) +
Math.pow(this.up.y - this.down.y, 2)
);
if(dpx <= this.clickTolerance) {
this.callback(key, args);
}
// we're done with this set of events now: clear the cached
// positions so we can't trip over them later (this can occur
// if one of the up/down events gets eaten before it gets to us
// but we still get the click)
this.up = this.down = null;
} else {
this.callback(key, args);
}
}
},
/**
* Method: activate
* Turn on the handler. Returns false if the handler was already active.
*
* Returns:
* {Boolean}
*/
activate: function() {
var activated = false;
if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.moveLayerToTop();
this.map.events.on({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
activated = true;
}
return activated;
},
/**
* Method: deactivate
* Turn off the handler. Returns false if the handler was already active.
*
* Returns:
* {Boolean}
*/
deactivate: function() {
var deactivated = false;
if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
this.moveLayerBack();
this.feature = null;
this.lastFeature = null;
this.down = null;
this.up = null;
this.map.events.un({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
deactivated = true;
}
return deactivated;
},
/**
* Method: handleMapEvents
*
* Parameters:
* evt - {Object}
*/
handleMapEvents: function(evt) {
if (evt.type == "removelayer" || evt.property == "order") {
this.moveLayerToTop();
}
},
/**
* Method: moveLayerToTop
* Moves the layer for this handler to the top, so mouse events can reach
* it.
*/
moveLayerToTop: function() {
var index = Math.max(this.map.Z_INDEX_BASE['Feature'] - 1,
this.layer.getZIndex()) + 1;
this.layer.setZIndex(index);
},
/**
* Method: moveLayerBack
* Moves the layer back to the position determined by the map's layers
* array.
*/
moveLayerBack: function() {
var index = this.layer.getZIndex() - 1;
if (index >= this.map.Z_INDEX_BASE['Feature']) {
this.layer.setZIndex(index);
} else {
this.map.setLayerZIndex(this.layer,
this.map.getLayerIndex(this.layer));
}
},
CLASS_NAME: "OpenLayers.Handler.Feature"
});
/* ======================================================================
OpenLayers/StyleMap.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Style.js
* @requires OpenLayers/Feature/Vector.js
*/
/**
* Class: OpenLayers.StyleMap
*/
OpenLayers.StyleMap = OpenLayers.Class({
/**
* Property: styles
* {Object} Hash of {<OpenLayers.Style>}, keyed by names of well known
* rendering intents (e.g. "default", "temporary", "select", "delete").
*/
styles: null,
/**
* Property: extendDefault
* {Boolean} if true, every render intent will extend the symbolizers
* specified for the "default" intent at rendering time. Otherwise, every
* rendering intent will be treated as a completely independent style.
*/
extendDefault: true,
/**
* Constructor: OpenLayers.StyleMap
*
* Parameters:
* style - {Object} Optional. Either a style hash, or a style object, or
* a hash of style objects (style hashes) keyed by rendering
* intent. If just one style hash or style object is passed,
* this will be used for all known render intents (default,
* select, temporary)
* options - {Object} optional hash of additional options for this
* instance
*/
initialize: function (style, options) {
this.styles = {
"default": new OpenLayers.Style(
OpenLayers.Feature.Vector.style["default"]),
"select": new OpenLayers.Style(
OpenLayers.Feature.Vector.style["select"]),
"temporary": new OpenLayers.Style(
OpenLayers.Feature.Vector.style["temporary"]),
"delete": new OpenLayers.Style(
OpenLayers.Feature.Vector.style["delete"])
};
// take whatever the user passed as style parameter and convert it
// into parts of stylemap.
if(style instanceof OpenLayers.Style) {
// user passed a style object
this.styles["default"] = style;
this.styles["select"] = style;
this.styles["temporary"] = style;
this.styles["delete"] = style;
} else if(typeof style == "object") {
for(var key in style) {
if(style[key] instanceof OpenLayers.Style) {
// user passed a hash of style objects
this.styles[key] = style[key];
} else if(typeof style[key] == "object") {
// user passsed a hash of style hashes
this.styles[key] = new OpenLayers.Style(style[key]);
} else {
// user passed a style hash (i.e. symbolizer)
this.styles["default"] = new OpenLayers.Style(style);
this.styles["select"] = new OpenLayers.Style(style);
this.styles["temporary"] = new OpenLayers.Style(style);
this.styles["delete"] = new OpenLayers.Style(style);
break;
}
}
}
OpenLayers.Util.extend(this, options);
},
/**
* Method: destroy
*/
destroy: function() {
for(var key in this.styles) {
this.styles[key].destroy();
}
this.styles = null;
},
/**
* Method: createSymbolizer
* Creates the symbolizer for a feature for a render intent.
*
* Parameters:
* feature - {<OpenLayers.Feature>} The feature to evaluate the rules
* of the intended style against.
* intent - {String} The intent determines the symbolizer that will be
* used to draw the feature. Well known intents are "default"
* (for just drawing the features), "select" (for selected
* features) and "temporary" (for drawing features).
*
* Returns:
* {Object} symbolizer hash
*/
createSymbolizer: function(feature, intent) {
if(!feature) {
feature = new OpenLayers.Feature.Vector();
}
if(!this.styles[intent]) {
intent = "default";
}
feature.renderIntent = intent;
var defaultSymbolizer = {};
if(this.extendDefault && intent != "default") {
defaultSymbolizer = this.styles["default"].createSymbolizer(feature);
}
return OpenLayers.Util.extend(defaultSymbolizer,
this.styles[intent].createSymbolizer(feature));
},
/**
* Method: addUniqueValueRules
* Convenience method to create comparison rules for unique values of a
* property. The rules will be added to the style object for a specified
* rendering intent. This method is a shortcut for creating something like
* the "unique value legends" familiar from well known desktop GIS systems
*
* Parameters:
* renderIntent - {String} rendering intent to add the rules to
* property - {String} values of feature attributes to create the
* rules for
* symbolizers - {Object} Hash of symbolizers, keyed by the desired
* property values
* context - {Object} An optional object with properties that
* symbolizers' property values should be evaluated
* against. If no context is specified, feature.attributes
* will be used
*/
addUniqueValueRules: function(renderIntent, property, symbolizers, context) {
var rules = [];
for (var value in symbolizers) {
rules.push(new OpenLayers.Rule({
symbolizer: symbolizers[value],
context: context,
filter: new OpenLayers.Filter.Comparison({
type: OpenLayers.Filter.Comparison.EQUAL_TO,
property: property,
value: value
})
}));
}
this.styles[renderIntent].addRules(rules);
},
CLASS_NAME: "OpenLayers.StyleMap"
});
/* ======================================================================
OpenLayers/Layer/Vector.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer.js
* @requires OpenLayers/Renderer.js
* @requires OpenLayers/StyleMap.js
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Console.js
* @requires OpenLayers/Lang.js
*/
/**
* Class: OpenLayers.Layer.Vector
* Instances of OpenLayers.Layer.Vector are used to render vector data from
* a variety of sources. Create a new vector layer with the
* <OpenLayers.Layer.Vector> constructor.
*
* Inherits from:
* - <OpenLayers.Layer>
*/
OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
/**
* APIProperty: events
* {<OpenLayers.Events>}
*
* Register a listener for a particular event with the following syntax:
* (code)
* layer.events.register(type, obj, listener);
* (end)
*
* Listeners will be called with a reference to an event object. The
* properties of this event depends on exactly what happened.
*
* All event objects have at least the following properties:
* object - {Object} A reference to layer.events.object.
* element - {DOMElement} A reference to layer.events.element.
*
* Supported map event types (in addition to those from <OpenLayers.Layer.events>):
* beforefeatureadded - Triggered before a feature is added. Listeners
* will receive an object with a *feature* property referencing the
* feature to be added. To stop the feature from being added, a
* listener should return false.
* beforefeaturesadded - Triggered before an array of features is added.
* Listeners will receive an object with a *features* property
* referencing the feature to be added. To stop the features from
* being added, a listener should return false.
* featureadded - Triggered after a feature is added. The event
* object passed to listeners will have a *feature* property with a
* reference to the added feature.
* featuresadded - Triggered after features are added. The event
* object passed to listeners will have a *features* property with a
* reference to an array of added features.
* beforefeatureremoved - Triggered before a feature is removed. Listeners
* will receive an object with a *feature* property referencing the
* feature to be removed.
* beforefeaturesremoved - Triggered before multiple features are removed.
* Listeners will receive an object with a *features* property
* referencing the features to be removed.
* featureremoved - Triggerd after a feature is removed. The event
* object passed to listeners will have a *feature* property with a
* reference to the removed feature.
* featuresremoved - Triggered after features are removed. The event
* object passed to listeners will have a *features* property with a
* reference to an array of removed features.
* beforefeatureselected - Triggered before a feature is selected. Listeners
* will receive an object with a *feature* property referencing the
* feature to be selected. To stop the feature from being selectd, a
* listener should return false.
* featureselected - Triggered after a feature is selected. Listeners
* will receive an object with a *feature* property referencing the
* selected feature.
* featureunselected - Triggered after a feature is unselected.
* Listeners will receive an object with a *feature* property
* referencing the unselected feature.
* beforefeaturemodified - Triggered when a feature is selected to
* be modified. Listeners will receive an object with a *feature*
* property referencing the selected feature.
* featuremodified - Triggered when a feature has been modified.
* Listeners will receive an object with a *feature* property referencing
* the modified feature.
* afterfeaturemodified - Triggered when a feature is finished being modified.
* Listeners will receive an object with a *feature* property referencing
* the modified feature.
* vertexmodified - Triggered when a vertex within any feature geometry
* has been modified. Listeners will receive an object with a
* *feature* property referencing the modified feature, a *vertex*
* property referencing the vertex modified (always a point geometry),
* and a *pixel* property referencing the pixel location of the
* modification.
* vertexremoved - Triggered when a vertex within any feature geometry
* has been deleted. Listeners will receive an object with a
* *feature* property referencing the modified feature, a *vertex*
* property referencing the vertex modified (always a point geometry),
* and a *pixel* property referencing the pixel location of the
* removal.
* sketchstarted - Triggered when a feature sketch bound for this layer
* is started. Listeners will receive an object with a *feature*
* property referencing the new sketch feature and a *vertex* property
* referencing the creation point.
* sketchmodified - Triggered when a feature sketch bound for this layer
* is modified. Listeners will receive an object with a *vertex*
* property referencing the modified vertex and a *feature* property
* referencing the sketch feature.
* sketchcomplete - Triggered when a feature sketch bound for this layer
* is complete. Listeners will receive an object with a *feature*
* property referencing the sketch feature. By returning false, a
* listener can stop the sketch feature from being added to the layer.
* refresh - Triggered when something wants a strategy to ask the protocol
* for a new set of features.
*/
/**
* APIProperty: isBaseLayer
* {Boolean} The layer is a base layer. Default is false. Set this property
* in the layer options.
*/
isBaseLayer: false,
/**
* APIProperty: isFixed
* {Boolean} Whether the layer remains in one place while dragging the
* map. Note that setting this to true will move the layer to the bottom
* of the layer stack.
*/
isFixed: false,
/**
* APIProperty: features
* {Array(<OpenLayers.Feature.Vector>)}
*/
features: null,
/**
* Property: filter
* {<OpenLayers.Filter>} The filter set in this layer,
* a strategy launching read requests can combined
* this filter with its own filter.
*/
filter: null,
/**
* Property: selectedFeatures
* {Array(<OpenLayers.Feature.Vector>)}
*/
selectedFeatures: null,
/**
* Property: unrenderedFeatures
* {Object} hash of features, keyed by feature.id, that the renderer
* failed to draw
*/
unrenderedFeatures: null,
/**
* APIProperty: reportError
* {Boolean} report friendly error message when loading of renderer
* fails.
*/
reportError: true,
/**
* APIProperty: style
* {Object} Default style for the layer
*/
style: null,
/**
* Property: styleMap
* {<OpenLayers.StyleMap>}
*/
styleMap: null,
/**
* Property: strategies
* {Array(<OpenLayers.Strategy>})} Optional list of strategies for the layer.
*/
strategies: null,
/**
* Property: protocol
* {<OpenLayers.Protocol>} Optional protocol for the layer.
*/
protocol: null,
/**
* Property: renderers
* {Array(String)} List of supported Renderer classes. Add to this list to
* add support for additional renderers. This list is ordered:
* the first renderer which returns true for the 'supported()'
* method will be used, if not defined in the 'renderer' option.
*/
renderers: ['SVG', 'VML', 'Canvas'],
/**
* Property: renderer
* {<OpenLayers.Renderer>}
*/
renderer: null,
/**
* APIProperty: rendererOptions
* {Object} Options for the renderer. See {<OpenLayers.Renderer>} for
* supported options.
*/
rendererOptions: null,
/**
* APIProperty: geometryType
* {String} geometryType allows you to limit the types of geometries this
* layer supports. This should be set to something like
* "OpenLayers.Geometry.Point" to limit types.
*/
geometryType: null,
/**
* Property: drawn
* {Boolean} Whether the Vector Layer features have been drawn yet.
*/
drawn: false,
/**
* APIProperty: ratio
* {Float} This specifies the ratio of the size of the visiblity of the Vector Layer features to the size of the map.
*/
ratio: 1,
/**
* Constructor: OpenLayers.Layer.Vector
* Create a new vector layer
*
* Parameters:
* name - {String} A name for the layer
* options - {Object} Optional object with non-default properties to set on
* the layer.
*
* Returns:
* {<OpenLayers.Layer.Vector>} A new vector layer
*/
initialize: function(name, options) {
OpenLayers.Layer.prototype.initialize.apply(this, arguments);
// allow user-set renderer, otherwise assign one
if (!this.renderer || !this.renderer.supported()) {
this.assignRenderer();
}
// if no valid renderer found, display error
if (!this.renderer || !this.renderer.supported()) {
this.renderer = null;
this.displayError();
}
if (!this.styleMap) {
this.styleMap = new OpenLayers.StyleMap();
}
this.features = [];
this.selectedFeatures = [];
this.unrenderedFeatures = {};
// Allow for custom layer behavior
if(this.strategies){
for(var i=0, len=this.strategies.length; i<len; i++) {
this.strategies[i].setLayer(this);
}
}
},
/**
* APIMethod: destroy
* Destroy this layer
*/
destroy: function() {
if (this.strategies) {
var strategy, i, len;
for(i=0, len=this.strategies.length; i<len; i++) {
strategy = this.strategies[i];
if(strategy.autoDestroy) {
strategy.destroy();
}
}
this.strategies = null;
}
if (this.protocol) {
if(this.protocol.autoDestroy) {
this.protocol.destroy();
}
this.protocol = null;
}
this.destroyFeatures();
this.features = null;
this.selectedFeatures = null;
this.unrenderedFeatures = null;
if (this.renderer) {
this.renderer.destroy();
}
this.renderer = null;
this.geometryType = null;
this.drawn = null;
OpenLayers.Layer.prototype.destroy.apply(this, arguments);
},
/**
* Method: clone
* Create a clone of this layer.
*
* Note: Features of the layer are also cloned.
*
* Returns:
* {<OpenLayers.Layer.Vector>} An exact clone of this layer
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.Vector(this.name, this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
var features = this.features;
var len = features.length;
var clonedFeatures = new Array(len);
for(var i=0; i<len; ++i) {
clonedFeatures[i] = features[i].clone();
}
obj.features = clonedFeatures;
return obj;
},
/**
* Method: refresh
* Ask the layer to request features again and redraw them. Triggers
* the refresh event if the layer is in range and visible.
*
* Parameters:
* obj - {Object} Optional object with properties for any listener of
* the refresh event.
*/
refresh: function(obj) {
if(this.calculateInRange() && this.visibility) {
this.events.triggerEvent("refresh", obj);
}
},
/**
* Method: assignRenderer
* Iterates through the available renderer implementations and selects
* and assigns the first one whose "supported()" function returns true.
*/
assignRenderer: function() {
for (var i=0, len=this.renderers.length; i<len; i++) {
var rendererClass = this.renderers[i];
var renderer = (typeof rendererClass == "function") ?
rendererClass :
OpenLayers.Renderer[rendererClass];
if (renderer && renderer.prototype.supported()) {
this.renderer = new renderer(this.div, this.rendererOptions);
break;
}
}
},
/**
* Method: displayError
* Let the user know their browser isn't supported.
*/
displayError: function() {
if (this.reportError) {
OpenLayers.Console.userError(OpenLayers.i18n("browserNotSupported",
{renderers: this. renderers.join('\n')}));
}
},
/**
* Method: setMap
* The layer has been added to the map.
*
* If there is no renderer set, the layer can't be used. Remove it.
* Otherwise, give the renderer a reference to the map and set its size.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
OpenLayers.Layer.prototype.setMap.apply(this, arguments);
if (!this.renderer) {
this.map.removeLayer(this);
} else {
this.renderer.map = this.map;
var newSize = this.map.getSize();
newSize.w = newSize.w * this.ratio;
newSize.h = newSize.h * this.ratio;
this.renderer.setSize(newSize);
}
},
/**
* Method: afterAdd
* Called at the end of the map.addLayer sequence. At this point, the map
* will have a base layer. Any autoActivate strategies will be
* activated here.
*/
afterAdd: function() {
if(this.strategies) {
var strategy, i, len;
for(i=0, len=this.strategies.length; i<len; i++) {
strategy = this.strategies[i];
if(strategy.autoActivate) {
strategy.activate();
}
}
}
},
/**
* Method: removeMap
* The layer has been removed from the map.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
removeMap: function(map) {
this.drawn = false;
if(this.strategies) {
var strategy, i, len;
for(i=0, len=this.strategies.length; i<len; i++) {
strategy = this.strategies[i];
if(strategy.autoActivate) {
strategy.deactivate();
}
}
}
},
/**
* Method: onMapResize
* Notify the renderer of the change in size.
*
*/
onMapResize: function() {
OpenLayers.Layer.prototype.onMapResize.apply(this, arguments);
var newSize = this.map.getSize();
newSize.w = newSize.w * this.ratio;
newSize.h = newSize.h * this.ratio;
this.renderer.setSize(newSize);
},
/**
* Method: moveTo
* Reset the vector layer's div so that it once again is lined up with
* the map. Notify the renderer of the change of extent, and in the
* case of a change of zoom level (resolution), have the
* renderer redraw features.
*
* If the layer has not yet been drawn, cycle through the layer's
* features and draw each one.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>}
* zoomChanged - {Boolean}
* dragging - {Boolean}
*/
moveTo: function(bounds, zoomChanged, dragging) {
OpenLayers.Layer.prototype.moveTo.apply(this, arguments);
var coordSysUnchanged = true;
if (!dragging) {
this.renderer.root.style.visibility = 'hidden';
var viewSize = this.map.getSize(),
viewWidth = viewSize.w,
viewHeight = viewSize.h,
offsetLeft = (viewWidth / 2 * this.ratio) - viewWidth / 2,
offsetTop = (viewHeight / 2 * this.ratio) - viewHeight / 2;
offsetLeft += this.map.layerContainerOriginPx.x;
offsetLeft = -Math.round(offsetLeft);
offsetTop += this.map.layerContainerOriginPx.y;
offsetTop = -Math.round(offsetTop);
this.div.style.left = offsetLeft + 'px';
this.div.style.top = offsetTop + 'px';
var extent = this.map.getExtent().scale(this.ratio);
coordSysUnchanged = this.renderer.setExtent(extent, zoomChanged);
this.renderer.root.style.visibility = 'visible';
// Force a reflow on gecko based browsers to prevent jump/flicker.
// This seems to happen on only certain configurations; it was originally
// noticed in FF 2.0 and Linux.
if (OpenLayers.IS_GECKO === true) {
this.div.scrollLeft = this.div.scrollLeft;
}
if (!zoomChanged && coordSysUnchanged) {
for (var i in this.unrenderedFeatures) {
var feature = this.unrenderedFeatures[i];
this.drawFeature(feature);
}
}
}
if (!this.drawn || zoomChanged || !coordSysUnchanged) {
this.drawn = true;
var feature;
for(var i=0, len=this.features.length; i<len; i++) {
this.renderer.locked = (i !== (len - 1));
feature = this.features[i];
this.drawFeature(feature);
}
}
},
/**
* APIMethod: display
* Hide or show the Layer
*
* Parameters:
* display - {Boolean}
*/
display: function(display) {
OpenLayers.Layer.prototype.display.apply(this, arguments);
// we need to set the display style of the root in case it is attached
// to a foreign layer
var currentDisplay = this.div.style.display;
if(currentDisplay != this.renderer.root.style.display) {
this.renderer.root.style.display = currentDisplay;
}
},
/**
* APIMethod: addFeatures
* Add Features to the layer.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)}
* options - {Object}
*/
addFeatures: function(features, options) {
if (!(OpenLayers.Util.isArray(features))) {
features = [features];
}
var notify = !options || !options.silent;
if(notify) {
var event = {features: features};
var ret = this.events.triggerEvent("beforefeaturesadded", event);
if(ret === false) {
return;
}
features = event.features;
}
// Track successfully added features for featuresadded event, since
// beforefeatureadded can veto single features.
var featuresAdded = [];
for (var i=0, len=features.length; i<len; i++) {
if (i != (features.length - 1)) {
this.renderer.locked = true;
} else {
this.renderer.locked = false;
}
var feature = features[i];
if (this.geometryType &&
!(feature.geometry instanceof this.geometryType)) {
throw new TypeError('addFeatures: component should be an ' +
this.geometryType.prototype.CLASS_NAME);
}
//give feature reference to its layer
feature.layer = this;
if (!feature.style && this.style) {
feature.style = OpenLayers.Util.extend({}, this.style);
}
if (notify) {
if(this.events.triggerEvent("beforefeatureadded",
{feature: feature}) === false) {
continue;
}
this.preFeatureInsert(feature);
}
featuresAdded.push(feature);
this.features.push(feature);
this.drawFeature(feature);
if (notify) {
this.events.triggerEvent("featureadded", {
feature: feature
});
this.onFeatureInsert(feature);
}
}
if(notify) {
this.events.triggerEvent("featuresadded", {features: featuresAdded});
}
},
/**
* APIMethod: removeFeatures
* Remove features from the layer. This erases any drawn features and
* removes them from the layer's control. The beforefeatureremoved
* and featureremoved events will be triggered for each feature. The
* featuresremoved event will be triggered after all features have
* been removed. To supress event triggering, use the silent option.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)} List of features to be
* removed.
* options - {Object} Optional properties for changing behavior of the
* removal.
*
* Valid options:
* silent - {Boolean} Supress event triggering. Default is false.
*/
removeFeatures: function(features, options) {
if(!features || features.length === 0) {
return;
}
if (features === this.features) {
return this.removeAllFeatures(options);
}
if (!(OpenLayers.Util.isArray(features))) {
features = [features];
}
if (features === this.selectedFeatures) {
features = features.slice();
}
var notify = !options || !options.silent;
if (notify) {
this.events.triggerEvent(
"beforefeaturesremoved", {features: features}
);
}
for (var i = features.length - 1; i >= 0; i--) {
// We remain locked so long as we're not at 0
// and the 'next' feature has a geometry. We do the geometry check
// because if all the features after the current one are 'null', we
// won't call eraseGeometry, so we break the 'renderer functions
// will always be called with locked=false *last*' rule. The end result
// is a possible gratiutious unlocking to save a loop through the rest
// of the list checking the remaining features every time. So long as
// null geoms are rare, this is probably okay.
if (i != 0 && features[i-1].geometry) {
this.renderer.locked = true;
} else {
this.renderer.locked = false;
}
var feature = features[i];
delete this.unrenderedFeatures[feature.id];
if (notify) {
this.events.triggerEvent("beforefeatureremoved", {
feature: feature
});
}
this.features = OpenLayers.Util.removeItem(this.features, feature);
// feature has no layer at this point
feature.layer = null;
if (feature.geometry) {
this.renderer.eraseFeatures(feature);
}
//in the case that this feature is one of the selected features,
// remove it from that array as well.
if (OpenLayers.Util.indexOf(this.selectedFeatures, feature) != -1){
OpenLayers.Util.removeItem(this.selectedFeatures, feature);
}
if (notify) {
this.events.triggerEvent("featureremoved", {
feature: feature
});
}
}
if (notify) {
this.events.triggerEvent("featuresremoved", {features: features});
}
},
/**
* APIMethod: removeAllFeatures
* Remove all features from the layer.
*
* Parameters:
* options - {Object} Optional properties for changing behavior of the
* removal.
*
* Valid options:
* silent - {Boolean} Supress event triggering. Default is false.
*/
removeAllFeatures: function(options) {
var notify = !options || !options.silent;
var features = this.features;
if (notify) {
this.events.triggerEvent(
"beforefeaturesremoved", {features: features}
);
}
var feature;
for (var i = features.length-1; i >= 0; i--) {
feature = features[i];
if (notify) {
this.events.triggerEvent("beforefeatureremoved", {
feature: feature
});
}
feature.layer = null;
if (notify) {
this.events.triggerEvent("featureremoved", {
feature: feature
});
}
}
this.renderer.clear();
this.features = [];
this.unrenderedFeatures = {};
this.selectedFeatures = [];
if (notify) {
this.events.triggerEvent("featuresremoved", {features: features});
}
},
/**
* APIMethod: destroyFeatures
* Erase and destroy features on the layer.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)} An optional array of
* features to destroy. If not supplied, all features on the layer
* will be destroyed.
* options - {Object}
*/
destroyFeatures: function(features, options) {
var all = (features == undefined); // evaluates to true if
// features is null
if(all) {
features = this.features;
}
if(features) {
this.removeFeatures(features, options);
for(var i=features.length-1; i>=0; i--) {
features[i].destroy();
}
}
},
/**
* APIMethod: drawFeature
* Draw (or redraw) a feature on the layer. If the optional style argument
* is included, this style will be used. If no style is included, the
* feature's style will be used. If the feature doesn't have a style,
* the layer's style will be used.
*
* This function is not designed to be used when adding features to
* the layer (use addFeatures instead). It is meant to be used when
* the style of a feature has changed, or in some other way needs to
* visually updated *after* it has already been added to a layer. You
* must add the feature to the layer for most layer-related events to
* happen.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* style - {String | Object} Named render intent or full symbolizer object.
*/
drawFeature: function(feature, style) {
// don't try to draw the feature with the renderer if the layer is not
// drawn itself
if (!this.drawn) {
return;
}
if (typeof style != "object") {
if(!style && feature.state === OpenLayers.State.DELETE) {
style = "delete";
}
var renderIntent = style || feature.renderIntent;
style = feature.style || this.style;
if (!style) {
style = this.styleMap.createSymbolizer(feature, renderIntent);
}
}
var drawn = this.renderer.drawFeature(feature, style);
//TODO remove the check for null when we get rid of Renderer.SVG
if (drawn === false || drawn === null) {
this.unrenderedFeatures[feature.id] = feature;
} else {
delete this.unrenderedFeatures[feature.id];
}
},
/**
* Method: eraseFeatures
* Erase features from the layer.
*
* Parameters:
* features - {Array(<OpenLayers.Feature.Vector>)}
*/
eraseFeatures: function(features) {
this.renderer.eraseFeatures(features);
},
/**
* Method: getFeatureFromEvent
* Given an event, return a feature if the event occurred over one.
* Otherwise, return null.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {<OpenLayers.Feature.Vector>} A feature if one was under the event.
*/
getFeatureFromEvent: function(evt) {
if (!this.renderer) {
throw new Error('getFeatureFromEvent called on layer with no ' +
'renderer. This usually means you destroyed a ' +
'layer, but not some handler which is associated ' +
'with it.');
}
var feature = null;
var featureId = this.renderer.getFeatureIdFromEvent(evt);
if (featureId) {
if (typeof featureId === "string") {
feature = this.getFeatureById(featureId);
} else {
feature = featureId;
}
}
return feature;
},
/**
* APIMethod: getFeatureBy
* Given a property value, return the feature if it exists in the features array
*
* Parameters:
* property - {String}
* value - {String}
*
* Returns:
* {<OpenLayers.Feature.Vector>} A feature corresponding to the given
* property value or null if there is no such feature.
*/
getFeatureBy: function(property, value) {
//TBD - would it be more efficient to use a hash for this.features?
var feature = null;
for(var i=0, len=this.features.length; i<len; ++i) {
if(this.features[i][property] == value) {
feature = this.features[i];
break;
}
}
return feature;
},
/**
* APIMethod: getFeatureById
* Given a feature id, return the feature if it exists in the features array
*
* Parameters:
* featureId - {String}
*
* Returns:
* {<OpenLayers.Feature.Vector>} A feature corresponding to the given
* featureId or null if there is no such feature.
*/
getFeatureById: function(featureId) {
return this.getFeatureBy('id', featureId);
},
/**
* APIMethod: getFeatureByFid
* Given a feature fid, return the feature if it exists in the features array
*
* Parameters:
* featureFid - {String}
*
* Returns:
* {<OpenLayers.Feature.Vector>} A feature corresponding to the given
* featureFid or null if there is no such feature.
*/
getFeatureByFid: function(featureFid) {
return this.getFeatureBy('fid', featureFid);
},
/**
* APIMethod: getFeaturesByAttribute
* Returns an array of features that have the given attribute key set to the
* given value. Comparison of attribute values takes care of datatypes, e.g.
* the string '1234' is not equal to the number 1234.
*
* Parameters:
* attrName - {String}
* attrValue - {Mixed}
*
* Returns:
* Array({<OpenLayers.Feature.Vector>}) An array of features that have the
* passed named attribute set to the given value.
*/
getFeaturesByAttribute: function(attrName, attrValue) {
var i,
feature,
len = this.features.length,
foundFeatures = [];
for(i = 0; i < len; i++) {
feature = this.features[i];
if(feature && feature.attributes) {
if (feature.attributes[attrName] === attrValue) {
foundFeatures.push(feature);
}
}
}
return foundFeatures;
},
/**
* Unselect the selected features
* i.e. clears the featureSelection array
* change the style back
clearSelection: function() {
var vectorLayer = this.map.vectorLayer;
for (var i = 0; i < this.map.featureSelection.length; i++) {
var featureSelection = this.map.featureSelection[i];
vectorLayer.drawFeature(featureSelection, vectorLayer.style);
}
this.map.featureSelection = [];
},
*/
/**
* APIMethod: onFeatureInsert
* method called after a feature is inserted.
* Does nothing by default. Override this if you
* need to do something on feature updates.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
onFeatureInsert: function(feature) {
},
/**
* APIMethod: preFeatureInsert
* method called before a feature is inserted.
* Does nothing by default. Override this if you
* need to do something when features are first added to the
* layer, but before they are drawn, such as adjust the style.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
preFeatureInsert: function(feature) {
},
/**
* APIMethod: getDataExtent
* Calculates the max extent which includes all of the features.
*
* Returns:
* {<OpenLayers.Bounds>} or null if the layer has no features with
* geometries.
*/
getDataExtent: function () {
var maxExtent = null;
var features = this.features;
if(features && (features.length > 0)) {
var geometry = null;
for(var i=0, len=features.length; i<len; i++) {
geometry = features[i].geometry;
if (geometry) {
if (maxExtent === null) {
maxExtent = new OpenLayers.Bounds();
}
maxExtent.extend(geometry.getBounds());
}
}
}
return maxExtent;
},
CLASS_NAME: "OpenLayers.Layer.Vector"
});
/* ======================================================================
OpenLayers/Layer/Vector/RootContainer.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/Vector.js
*/
/**
* Class: OpenLayers.Layer.Vector.RootContainer
* A special layer type to combine multiple vector layers inside a single
* renderer root container. This class is not supposed to be instantiated
* from user space, it is a helper class for controls that require event
* processing for multiple vector layers.
*
* Inherits from:
* - <OpenLayers.Layer.Vector>
*/
OpenLayers.Layer.Vector.RootContainer = OpenLayers.Class(OpenLayers.Layer.Vector, {
/**
* Property: displayInLayerSwitcher
* Set to false for this layer type
*/
displayInLayerSwitcher: false,
/**
* APIProperty: layers
* Layers that are attached to this container. Required config option.
*/
layers: null,
/**
* Constructor: OpenLayers.Layer.Vector.RootContainer
* Create a new root container for multiple vector layer. This constructor
* is not supposed to be used from user space, it is only to be used by
* controls that need feature selection across multiple vector layers.
*
* Parameters:
* name - {String} A name for the layer
* options - {Object} Optional object with non-default properties to set on
* the layer.
*
* Required options properties:
* layers - {Array(<OpenLayers.Layer.Vector>)} The layers managed by this
* container
*
* Returns:
* {<OpenLayers.Layer.Vector.RootContainer>} A new vector layer root
* container
*/
/**
* Method: display
*/
display: function() {},
/**
* Method: getFeatureFromEvent
* walk through the layers to find the feature returned by the event
*
* Parameters:
* evt - {Object} event object with a feature property
*
* Returns:
* {<OpenLayers.Feature.Vector>}
*/
getFeatureFromEvent: function(evt) {
var layers = this.layers;
var feature;
for(var i=0; i<layers.length; i++) {
feature = layers[i].getFeatureFromEvent(evt);
if(feature) {
return feature;
}
}
},
/**
* Method: setMap
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
OpenLayers.Layer.Vector.prototype.setMap.apply(this, arguments);
this.collectRoots();
map.events.register("changelayer", this, this.handleChangeLayer);
},
/**
* Method: removeMap
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
removeMap: function(map) {
map.events.unregister("changelayer", this, this.handleChangeLayer);
this.resetRoots();
OpenLayers.Layer.Vector.prototype.removeMap.apply(this, arguments);
},
/**
* Method: collectRoots
* Collects the root nodes of all layers this control is configured with
* and moveswien the nodes to this control's layer
*/
collectRoots: function() {
var layer;
// walk through all map layers, because we want to keep the order
for(var i=0; i<this.map.layers.length; ++i) {
layer = this.map.layers[i];
if(OpenLayers.Util.indexOf(this.layers, layer) != -1) {
layer.renderer.moveRoot(this.renderer);
}
}
},
/**
* Method: resetRoots
* Resets the root nodes back into the layers they belong to.
*/
resetRoots: function() {
var layer;
for(var i=0; i<this.layers.length; ++i) {
layer = this.layers[i];
if(this.renderer && layer.renderer.getRenderLayerId() == this.id) {
this.renderer.moveRoot(layer.renderer);
}
}
},
/**
* Method: handleChangeLayer
* Event handler for the map's changelayer event. We need to rebuild
* this container's layer dom if order of one of its layers changes.
* This handler is added with the setMap method, and removed with the
* removeMap method.
*
* Parameters:
* evt - {Object}
*/
handleChangeLayer: function(evt) {
var layer = evt.layer;
if(evt.property == "order" &&
OpenLayers.Util.indexOf(this.layers, layer) != -1) {
this.resetRoots();
this.collectRoots();
}
},
CLASS_NAME: "OpenLayers.Layer.Vector.RootContainer"
});
/* ======================================================================
OpenLayers/Control/SelectFeature.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Handler/Feature.js
* @requires OpenLayers/Layer/Vector/RootContainer.js
*/
/**
* Class: OpenLayers.Control.SelectFeature
* The SelectFeature control selects vector features from a given layer on
* click or hover.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.SelectFeature = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: events
* {<OpenLayers.Events>} Events instance for listeners and triggering
* control specific events.
*
* Register a listener for a particular event with the following syntax:
* (code)
* control.events.register(type, obj, listener);
* (end)
*
* Supported event types (in addition to those from <OpenLayers.Control.events>):
* beforefeaturehighlighted - Triggered before a feature is highlighted
* featurehighlighted - Triggered when a feature is highlighted
* featureunhighlighted - Triggered when a feature is unhighlighted
* boxselectionstart - Triggered before box selection starts
* boxselectionend - Triggered after box selection ends
*/
/**
* Property: multipleKey
* {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
* the <multiple> property to true. Default is null.
*/
multipleKey: null,
/**
* Property: toggleKey
* {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
* the <toggle> property to true. Default is null.
*/
toggleKey: null,
/**
* APIProperty: multiple
* {Boolean} Allow selection of multiple geometries. Default is false.
*/
multiple: false,
/**
* APIProperty: clickout
* {Boolean} Unselect features when clicking outside any feature.
* Default is true.
*/
clickout: true,
/**
* APIProperty: toggle
* {Boolean} Unselect a selected feature on click. Default is false. Only
* has meaning if hover is false.
*/
toggle: false,
/**
* APIProperty: hover
* {Boolean} Select on mouse over and deselect on mouse out. If true, this
* ignores clicks and only listens to mouse moves.
*/
hover: false,
/**
* APIProperty: highlightOnly
* {Boolean} If true do not actually select features (that is place them in
* the layer's selected features array), just highlight them. This property
* has no effect if hover is false. Defaults to false.
*/
highlightOnly: false,
/**
* APIProperty: box
* {Boolean} Allow feature selection by drawing a box.
*/
box: false,
/**
* Property: onBeforeSelect
* {Function} Optional function to be called before a feature is selected.
* The function should expect to be called with a feature.
*/
onBeforeSelect: function() {},
/**
* APIProperty: onSelect
* {Function} Optional function to be called when a feature is selected.
* The function should expect to be called with a feature.
*/
onSelect: function() {},
/**
* APIProperty: onUnselect
* {Function} Optional function to be called when a feature is unselected.
* The function should expect to be called with a feature.
*/
onUnselect: function() {},
/**
* Property: scope
* {Object} The scope to use with the onBeforeSelect, onSelect, onUnselect
* callbacks. If null the scope will be this control.
*/
scope: null,
/**
* APIProperty: geometryTypes
* {Array(String)} To restrict selecting to a limited set of geometry types,
* send a list of strings corresponding to the geometry class names.
*/
geometryTypes: null,
/**
* Property: layer
* {<OpenLayers.Layer.Vector>} The vector layer with a common renderer
* root for all layers this control is configured with (if an array of
* layers was passed to the constructor), or the vector layer the control
* was configured with (if a single layer was passed to the constructor).
*/
layer: null,
/**
* Property: layers
* {Array(<OpenLayers.Layer.Vector>)} The layers this control will work on,
* or null if the control was configured with a single layer
*/
layers: null,
/**
* APIProperty: callbacks
* {Object} The functions that are sent to the handlers.feature for callback
*/
callbacks: null,
/**
* APIProperty: selectStyle
* {Object} Hash of styles
*/
selectStyle: null,
/**
* Property: renderIntent
* {String} key used to retrieve the select style from the layer's
* style map.
*/
renderIntent: "select",
/**
* Property: handlers
* {Object} Object with references to multiple <OpenLayers.Handler>
* instances.
*/
handlers: null,
/**
* Constructor: OpenLayers.Control.SelectFeature
* Create a new control for selecting features.
*
* Parameters:
* layers - {<OpenLayers.Layer.Vector>}, or an array of vector layers. The
* layer(s) this control will select features from.
* options - {Object}
*/
initialize: function(layers, options) {
OpenLayers.Control.prototype.initialize.apply(this, [options]);
if(this.scope === null) {
this.scope = this;
}
this.initLayer(layers);
var callbacks = {
click: this.clickFeature,
clickout: this.clickoutFeature
};
if (this.hover) {
callbacks.over = this.overFeature;
callbacks.out = this.outFeature;
}
this.callbacks = OpenLayers.Util.extend(callbacks, this.callbacks);
this.handlers = {
feature: new OpenLayers.Handler.Feature(
this, this.layer, this.callbacks,
{geometryTypes: this.geometryTypes}
)
};
if (this.box) {
this.handlers.box = new OpenLayers.Handler.Box(
this, {done: this.selectBox},
{boxDivClassName: "olHandlerBoxSelectFeature"}
);
}
},
/**
* Method: initLayer
* Assign the layer property. If layers is an array, we need to use
* a RootContainer.
*
* Parameters:
* layers - {<OpenLayers.Layer.Vector>}, or an array of vector layers.
*/
initLayer: function(layers) {
if(OpenLayers.Util.isArray(layers)) {
this.layers = layers;
this.layer = new OpenLayers.Layer.Vector.RootContainer(
this.id + "_container", {
layers: layers
}
);
} else {
this.layer = layers;
}
},
/**
* Method: destroy
*/
destroy: function() {
if(this.active && this.layers) {
this.map.removeLayer(this.layer);
}
OpenLayers.Control.prototype.destroy.apply(this, arguments);
if(this.layers) {
this.layer.destroy();
}
},
/**
* Method: activate
* Activates the control.
*
* Returns:
* {Boolean} The control was effectively activated.
*/
activate: function () {
if (!this.active) {
if(this.layers) {
this.map.addLayer(this.layer);
}
this.handlers.feature.activate();
if(this.box && this.handlers.box) {
this.handlers.box.activate();
}
}
return OpenLayers.Control.prototype.activate.apply(
this, arguments
);
},
/**
* Method: deactivate
* Deactivates the control.
*
* Returns:
* {Boolean} The control was effectively deactivated.
*/
deactivate: function () {
if (this.active) {
this.handlers.feature.deactivate();
if(this.handlers.box) {
this.handlers.box.deactivate();
}
if(this.layers) {
this.map.removeLayer(this.layer);
}
}
return OpenLayers.Control.prototype.deactivate.apply(
this, arguments
);
},
/**
* Method: unselectAll
* Unselect all selected features. To unselect all except for a single
* feature, set the options.except property to the feature.
*
* Parameters:
* options - {Object} Optional configuration object.
*/
unselectAll: function(options) {
// we'll want an option to supress notification here
var layers = this.layers || [this.layer],
layer, feature, l, numExcept;
for(l=0; l<layers.length; ++l) {
layer = layers[l];
numExcept = 0;
//layer.selectedFeatures is null when layer is destroyed and
//one of it's preremovelayer listener calls setLayer
//with another layer on this control
if(layer.selectedFeatures != null) {
while(layer.selectedFeatures.length > numExcept) {
feature = layer.selectedFeatures[numExcept];
if(!options || options.except != feature) {
this.unselect(feature);
} else {
++numExcept;
}
}
}
}
},
/**
* Method: clickFeature
* Called on click in a feature
* Only responds if this.hover is false.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
clickFeature: function(feature) {
if(!this.hover) {
var selected = (OpenLayers.Util.indexOf(
feature.layer.selectedFeatures, feature) > -1);
if(selected) {
if(this.toggleSelect()) {
this.unselect(feature);
} else if(!this.multipleSelect()) {
this.unselectAll({except: feature});
}
} else {
if(!this.multipleSelect()) {
this.unselectAll({except: feature});
}
this.select(feature);
}
}
},
/**
* Method: multipleSelect
* Allow for multiple selected features based on <multiple> property and
* <multipleKey> event modifier.
*
* Returns:
* {Boolean} Allow for multiple selected features.
*/
multipleSelect: function() {
return this.multiple || (this.handlers.feature.evt &&
this.handlers.feature.evt[this.multipleKey]);
},
/**
* Method: toggleSelect
* Event should toggle the selected state of a feature based on <toggle>
* property and <toggleKey> event modifier.
*
* Returns:
* {Boolean} Toggle the selected state of a feature.
*/
toggleSelect: function() {
return this.toggle || (this.handlers.feature.evt &&
this.handlers.feature.evt[this.toggleKey]);
},
/**
* Method: clickoutFeature
* Called on click outside a previously clicked (selected) feature.
* Only responds if this.hover is false.
*
* Parameters:
* feature - {<OpenLayers.Vector.Feature>}
*/
clickoutFeature: function(feature) {
if(!this.hover && this.clickout) {
this.unselectAll();
}
},
/**
* Method: overFeature
* Called on over a feature.
* Only responds if this.hover is true.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
overFeature: function(feature) {
var layer = feature.layer;
if(this.hover) {
if(this.highlightOnly) {
this.highlight(feature);
} else if(OpenLayers.Util.indexOf(
layer.selectedFeatures, feature) == -1) {
this.select(feature);
}
}
},
/**
* Method: outFeature
* Called on out of a selected feature.
* Only responds if this.hover is true.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
outFeature: function(feature) {
if(this.hover) {
if(this.highlightOnly) {
// we do nothing if we're not the last highlighter of the
// feature
if(feature._lastHighlighter == this.id) {
// if another select control had highlighted the feature before
// we did it ourself then we use that control to highlight the
// feature as it was before we highlighted it, else we just
// unhighlight it
if(feature._prevHighlighter &&
feature._prevHighlighter != this.id) {
delete feature._lastHighlighter;
var control = this.map.getControl(
feature._prevHighlighter);
if(control) {
control.highlight(feature);
}
} else {
this.unhighlight(feature);
}
}
} else {
this.unselect(feature);
}
}
},
/**
* Method: highlight
* Redraw feature with the select style.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
highlight: function(feature) {
var layer = feature.layer;
var cont = this.events.triggerEvent("beforefeaturehighlighted", {
feature : feature
});
if(cont !== false) {
feature._prevHighlighter = feature._lastHighlighter;
feature._lastHighlighter = this.id;
var style = this.selectStyle || this.renderIntent;
layer.drawFeature(feature, style);
this.events.triggerEvent("featurehighlighted", {feature : feature});
}
},
/**
* Method: unhighlight
* Redraw feature with the "default" style
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
unhighlight: function(feature) {
var layer = feature.layer;
// three cases:
// 1. there's no other highlighter, in that case _prev is undefined,
// and we just need to undef _last
// 2. another control highlighted the feature after we did it, in
// that case _last references this other control, and we just
// need to undef _prev
// 3. another control highlighted the feature before we did it, in
// that case _prev references this other control, and we need to
// set _last to _prev and undef _prev
if(feature._prevHighlighter == undefined) {
delete feature._lastHighlighter;
} else if(feature._prevHighlighter == this.id) {
delete feature._prevHighlighter;
} else {
feature._lastHighlighter = feature._prevHighlighter;
delete feature._prevHighlighter;
}
layer.drawFeature(feature, feature.style || feature.layer.style ||
"default");
this.events.triggerEvent("featureunhighlighted", {feature : feature});
},
/**
* Method: select
* Add feature to the layer's selectedFeature array, render the feature as
* selected, and call the onSelect function.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
select: function(feature) {
var cont = this.onBeforeSelect.call(this.scope, feature);
var layer = feature.layer;
if(cont !== false) {
cont = layer.events.triggerEvent("beforefeatureselected", {
feature: feature
});
if(cont !== false) {
layer.selectedFeatures.push(feature);
this.highlight(feature);
// if the feature handler isn't involved in the feature
// selection (because the box handler is used or the
// feature is selected programatically) we fake the
// feature handler to allow unselecting on click
if(!this.handlers.feature.lastFeature) {
this.handlers.feature.lastFeature = layer.selectedFeatures[0];
}
layer.events.triggerEvent("featureselected", {feature: feature});
this.onSelect.call(this.scope, feature);
}
}
},
/**
* Method: unselect
* Remove feature from the layer's selectedFeature array, render the feature as
* normal, and call the onUnselect function.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*/
unselect: function(feature) {
var layer = feature.layer;
// Store feature style for restoration later
this.unhighlight(feature);
OpenLayers.Util.removeItem(layer.selectedFeatures, feature);
layer.events.triggerEvent("featureunselected", {feature: feature});
this.onUnselect.call(this.scope, feature);
},
/**
* Method: selectBox
* Callback from the handlers.box set up when <box> selection is true
* on.
*
* Parameters:
* position - {<OpenLayers.Bounds> || <OpenLayers.Pixel> }
*/
selectBox: function(position) {
if (position instanceof OpenLayers.Bounds) {
var minXY = this.map.getLonLatFromPixel({
x: position.left,
y: position.bottom
});
var maxXY = this.map.getLonLatFromPixel({
x: position.right,
y: position.top
});
var bounds = new OpenLayers.Bounds(
minXY.lon, minXY.lat, maxXY.lon, maxXY.lat
);
// if multiple is false, first deselect currently selected features
if (!this.multipleSelect()) {
this.unselectAll();
}
// because we're using a box, we consider we want multiple selection
var prevMultiple = this.multiple;
this.multiple = true;
var layers = this.layers || [this.layer];
this.events.triggerEvent("boxselectionstart", {layers: layers});
var layer;
for(var l=0; l<layers.length; ++l) {
layer = layers[l];
for(var i=0, len = layer.features.length; i<len; ++i) {
var feature = layer.features[i];
// check if the feature is displayed
if (!feature.getVisibility()) {
continue;
}
if (this.geometryTypes == null || OpenLayers.Util.indexOf(
this.geometryTypes, feature.geometry.CLASS_NAME) > -1) {
if (bounds.toGeometry().intersects(feature.geometry)) {
if (OpenLayers.Util.indexOf(layer.selectedFeatures, feature) == -1) {
this.select(feature);
}
}
}
}
}
this.multiple = prevMultiple;
this.events.triggerEvent("boxselectionend", {layers: layers});
}
},
/**
* Method: setMap
* Set the map property for the control.
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
setMap: function(map) {
this.handlers.feature.setMap(map);
if (this.box) {
this.handlers.box.setMap(map);
}
OpenLayers.Control.prototype.setMap.apply(this, arguments);
},
/**
* APIMethod: setLayer
* Attach a new layer to the control, overriding any existing layers.
*
* Parameters:
* layers - Array of {<OpenLayers.Layer.Vector>} or a single
* {<OpenLayers.Layer.Vector>}
*/
setLayer: function(layers) {
var isActive = this.active;
this.unselectAll();
this.deactivate();
if(this.layers) {
this.layer.destroy();
this.layers = null;
}
this.initLayer(layers);
this.handlers.feature.layer = this.layer;
if (isActive) {
this.activate();
}
},
CLASS_NAME: "OpenLayers.Control.SelectFeature"
});
/* ======================================================================
OpenLayers/Handler/Point.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
* @requires OpenLayers/Geometry/Point.js
*/
/**
* Class: OpenLayers.Handler.Point
* Handler to draw a point on the map. Point is displayed on activation,
* moves on mouse move, and is finished on mouse up. The handler triggers
* callbacks for 'done', 'cancel', and 'modify'. The modify callback is
* called with each change in the sketch and will receive the latest point
* drawn. Create a new instance with the <OpenLayers.Handler.Point>
* constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: point
* {<OpenLayers.Feature.Vector>} The currently drawn point
*/
point: null,
/**
* Property: layer
* {<OpenLayers.Layer.Vector>} The temporary drawing layer
*/
layer: null,
/**
* APIProperty: multi
* {Boolean} Cast features to multi-part geometries before passing to the
* layer. Default is false.
*/
multi: false,
/**
* APIProperty: citeCompliant
* {Boolean} If set to true, coordinates of features drawn in a map extent
* crossing the date line won't exceed the world bounds. Default is false.
*/
citeCompliant: false,
/**
* Property: mouseDown
* {Boolean} The mouse is down
*/
mouseDown: false,
/**
* Property: stoppedDown
* {Boolean} Indicate whether the last mousedown stopped the event
* propagation.
*/
stoppedDown: null,
/**
* Property: lastDown
* {<OpenLayers.Pixel>} Location of the last mouse down
*/
lastDown: null,
/**
* Property: lastUp
* {<OpenLayers.Pixel>}
*/
lastUp: null,
/**
* APIProperty: persist
* {Boolean} Leave the feature rendered until destroyFeature is called.
* Default is false. If set to true, the feature remains rendered until
* destroyFeature is called, typically by deactivating the handler or
* starting another drawing.
*/
persist: false,
/**
* APIProperty: stopDown
* {Boolean} Stop event propagation on mousedown. Must be false to
* allow "pan while drawing". Defaults to false.
*/
stopDown: false,
/**
* APIPropery: stopUp
* {Boolean} Stop event propagation on mouse. Must be false to
* allow "pan while dragging". Defaults to fase.
*/
stopUp: false,
/**
* Property: layerOptions
* {Object} Any optional properties to be set on the sketch layer.
*/
layerOptions: null,
/**
* APIProperty: pixelTolerance
* {Number} Maximum number of pixels between down and up (mousedown
* and mouseup, or touchstart and touchend) for the handler to
* add a new point. If set to an integer value, if the
* displacement between down and up is great to this value
* no point will be added. Default value is 5.
*/
pixelTolerance: 5,
/**
* Property: lastTouchPx
* {<OpenLayers.Pixel>} The last pixel used to know the distance between
* two touches (for double touch).
*/
lastTouchPx: null,
/**
* Constructor: OpenLayers.Handler.Point
* Create a new point handler.
*
* Parameters:
* control - {<OpenLayers.Control>} The control that owns this handler
* callbacks - {Object} An object with a properties whose values are
* functions. Various callbacks described below.
* options - {Object} An optional object with properties to be set on the
* handler
*
* Named callbacks:
* create - Called when a sketch is first created. Callback called with
* the creation point geometry and sketch feature.
* modify - Called with each move of a vertex with the vertex (point)
* geometry and the sketch feature.
* done - Called when the point drawing is finished. The callback will
* recieve a single argument, the point geometry.
* cancel - Called when the handler is deactivated while drawing. The
* cancel callback will receive a geometry.
*/
initialize: function(control, callbacks, options) {
if(!(options && options.layerOptions && options.layerOptions.styleMap)) {
this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});
}
OpenLayers.Handler.prototype.initialize.apply(this, arguments);
},
/**
* APIMethod: activate
* turn on the handler
*/
activate: function() {
if(!OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
return false;
}
// create temporary vector layer for rendering geometry sketch
// TBD: this could be moved to initialize/destroy - setting visibility here
var options = OpenLayers.Util.extend({
displayInLayerSwitcher: false,
// indicate that the temp vector layer will never be out of range
// without this, resolution properties must be specified at the
// map-level for this temporary layer to init its resolutions
// correctly
calculateInRange: OpenLayers.Function.True,
wrapDateLine: this.citeCompliant
}, this.layerOptions);
this.layer = new OpenLayers.Layer.Vector(this.CLASS_NAME, options);
this.map.addLayer(this.layer);
return true;
},
/**
* Method: createFeature
* Add temporary features
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} A pixel location on the map.
*/
createFeature: function(pixel) {
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
var geometry = new OpenLayers.Geometry.Point(
lonlat.lon, lonlat.lat
);
this.point = new OpenLayers.Feature.Vector(geometry);
this.callback("create", [this.point.geometry, this.point]);
this.point.geometry.clearBounds();
this.layer.addFeatures([this.point], {silent: true});
},
/**
* APIMethod: deactivate
* turn off the handler
*/
deactivate: function() {
if(!OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
return false;
}
this.cancel();
// If a layer's map property is set to null, it means that that layer
// isn't added to the map. Since we ourself added the layer to the map
// in activate(), we can assume that if this.layer.map is null it means
// that the layer has been destroyed (as a result of map.destroy() for
// example.
if (this.layer.map != null) {
this.destroyFeature(true);
this.layer.destroy(false);
}
this.layer = null;
return true;
},
/**
* Method: destroyFeature
* Destroy the temporary geometries
*
* Parameters:
* force - {Boolean} Destroy even if persist is true.
*/
destroyFeature: function(force) {
if(this.layer && (force || !this.persist)) {
this.layer.destroyFeatures();
}
this.point = null;
},
/**
* Method: destroyPersistedFeature
* Destroy the persisted feature.
*/
destroyPersistedFeature: function() {
var layer = this.layer;
if(layer && layer.features.length > 1) {
this.layer.features[0].destroy();
}
},
/**
* Method: finalize
* Finish the geometry and call the "done" callback.
*
* Parameters:
* cancel - {Boolean} Call cancel instead of done callback. Default
* is false.
*/
finalize: function(cancel) {
var key = cancel ? "cancel" : "done";
this.mouseDown = false;
this.lastDown = null;
this.lastUp = null;
this.lastTouchPx = null;
this.callback(key, [this.geometryClone()]);
this.destroyFeature(cancel);
},
/**
* APIMethod: cancel
* Finish the geometry and call the "cancel" callback.
*/
cancel: function() {
this.finalize(true);
},
/**
* Method: click
* Handle clicks. Clicks are stopped from propagating to other listeners
* on map.events or other dom elements.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
click: function(evt) {
OpenLayers.Event.stop(evt);
return false;
},
/**
* Method: dblclick
* Handle double-clicks. Double-clicks are stopped from propagating to other
* listeners on map.events or other dom elements.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
dblclick: function(evt) {
OpenLayers.Event.stop(evt);
return false;
},
/**
* Method: modifyFeature
* Modify the existing geometry given a pixel location.
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} A pixel location on the map.
*/
modifyFeature: function(pixel) {
if(!this.point) {
this.createFeature(pixel);
}
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
this.point.geometry.x = lonlat.lon;
this.point.geometry.y = lonlat.lat;
this.callback("modify", [this.point.geometry, this.point, false]);
this.point.geometry.clearBounds();
this.drawFeature();
},
/**
* Method: drawFeature
* Render features on the temporary layer.
*/
drawFeature: function() {
this.layer.drawFeature(this.point, this.style);
},
/**
* Method: getGeometry
* Return the sketch geometry. If <multi> is true, this will return
* a multi-part geometry.
*
* Returns:
* {<OpenLayers.Geometry.Point>}
*/
getGeometry: function() {
var geometry = this.point && this.point.geometry;
if(geometry && this.multi) {
geometry = new OpenLayers.Geometry.MultiPoint([geometry]);
}
return geometry;
},
/**
* Method: geometryClone
* Return a clone of the relevant geometry.
*
* Returns:
* {<OpenLayers.Geometry>}
*/
geometryClone: function() {
var geom = this.getGeometry();
return geom && geom.clone();
},
/**
* Method: mousedown
* Handle mousedown.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
mousedown: function(evt) {
return this.down(evt);
},
/**
* Method: touchstart
* Handle touchstart.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
touchstart: function(evt) {
this.startTouch();
this.lastTouchPx = evt.xy;
return this.down(evt);
},
/**
* Method: mousemove
* Handle mousemove.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
mousemove: function(evt) {
return this.move(evt);
},
/**
* Method: touchmove
* Handle touchmove.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
touchmove: function(evt) {
this.lastTouchPx = evt.xy;
return this.move(evt);
},
/**
* Method: mouseup
* Handle mouseup.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
mouseup: function(evt) {
return this.up(evt);
},
/**
* Method: touchend
* Handle touchend.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
touchend: function(evt) {
evt.xy = this.lastTouchPx;
return this.up(evt);
},
/**
* Method: down
* Handle mousedown and touchstart. Adjust the geometry and redraw.
* Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
down: function(evt) {
this.mouseDown = true;
this.lastDown = evt.xy;
if(!this.touch) { // no point displayed until up on touch devices
this.modifyFeature(evt.xy);
}
this.stoppedDown = this.stopDown;
return !this.stopDown;
},
/**
* Method: move
* Handle mousemove and touchmove. Adjust the geometry and redraw.
* Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
move: function (evt) {
if(!this.touch // no point displayed until up on touch devices
&& (!this.mouseDown || this.stoppedDown)) {
this.modifyFeature(evt.xy);
}
return true;
},
/**
* Method: up
* Handle mouseup and touchend. Send the latest point in the geometry to the control.
* Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
up: function (evt) {
this.mouseDown = false;
this.stoppedDown = this.stopDown;
// check keyboard modifiers
if(!this.checkModifiers(evt)) {
return true;
}
// ignore double-clicks
if (this.lastUp && this.lastUp.equals(evt.xy)) {
return true;
}
if (this.lastDown && this.passesTolerance(this.lastDown, evt.xy,
this.pixelTolerance)) {
if (this.touch) {
this.modifyFeature(evt.xy);
}
if(this.persist) {
this.destroyPersistedFeature();
}
this.lastUp = evt.xy;
this.finalize();
return !this.stopUp;
} else {
return true;
}
},
/**
* Method: mouseout
* Handle mouse out. For better user experience reset mouseDown
* and stoppedDown when the mouse leaves the map viewport.
*
* Parameters:
* evt - {Event} The browser event
*/
mouseout: function(evt) {
if(OpenLayers.Util.mouseLeft(evt, this.map.viewPortDiv)) {
this.stoppedDown = this.stopDown;
this.mouseDown = false;
}
},
/**
* Method: passesTolerance
* Determine whether the event is within the optional pixel tolerance.
*
* Returns:
* {Boolean} The event is within the pixel tolerance (if specified).
*/
passesTolerance: function(pixel1, pixel2, tolerance) {
var passes = true;
if (tolerance != null && pixel1 && pixel2) {
var dist = pixel1.distanceTo(pixel2);
if (dist > tolerance) {
passes = false;
}
}
return passes;
},
CLASS_NAME: "OpenLayers.Handler.Point"
});
/* ======================================================================
OpenLayers/Handler/Path.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler/Point.js
* @requires OpenLayers/Geometry/Point.js
* @requires OpenLayers/Geometry/LineString.js
*/
/**
* Class: OpenLayers.Handler.Path
* Handler to draw a path on the map. Path is displayed on mouse down,
* moves on mouse move, and is finished on mouse up.
*
* Inherits from:
* - <OpenLayers.Handler.Point>
*/
OpenLayers.Handler.Path = OpenLayers.Class(OpenLayers.Handler.Point, {
/**
* Property: line
* {<OpenLayers.Feature.Vector>}
*/
line: null,
/**
* APIProperty: maxVertices
* {Number} The maximum number of vertices which can be drawn by this
* handler. When the number of vertices reaches maxVertices, the
* geometry is automatically finalized. Default is null.
*/
maxVertices: null,
/**
* Property: doubleTouchTolerance
* {Number} Maximum number of pixels between two touches for
* the gesture to be considered a "finalize feature" action.
* Default is 20.
*/
doubleTouchTolerance: 20,
/**
* Property: freehand
* {Boolean} In freehand mode, the handler starts the path on mouse down,
* adds a point for every mouse move, and finishes the path on mouse up.
* Outside of freehand mode, a point is added to the path on every mouse
* click and double-click finishes the path.
*/
freehand: false,
/**
* Property: freehandToggle
* {String} If set, freehandToggle is checked on mouse events and will set
* the freehand mode to the opposite of this.freehand. To disallow
* toggling between freehand and non-freehand mode, set freehandToggle to
* null. Acceptable toggle values are 'shiftKey', 'ctrlKey', and 'altKey'.
*/
freehandToggle: 'shiftKey',
/**
* Property: timerId
* {Integer} The timer used to test the double touch.
*/
timerId: null,
/**
* Property: redoStack
* {Array} Stack containing points removed with <undo>.
*/
redoStack: null,
/**
* Constructor: OpenLayers.Handler.Path
* Create a new path hander
*
* Parameters:
* control - {<OpenLayers.Control>} The control that owns this handler
* callbacks - {Object} An object with a properties whose values are
* functions. Various callbacks described below.
* options - {Object} An optional object with properties to be set on the
* handler
*
* Named callbacks:
* create - Called when a sketch is first created. Callback called with
* the creation point geometry and sketch feature.
* modify - Called with each move of a vertex with the vertex (point)
* geometry and the sketch feature.
* point - Called as each point is added. Receives the new point geometry.
* done - Called when the point drawing is finished. The callback will
* recieve a single argument, the linestring geometry.
* cancel - Called when the handler is deactivated while drawing. The
* cancel callback will receive a geometry.
*/
/**
* Method: createFeature
* Add temporary geometries
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The initial pixel location for the new
* feature.
*/
createFeature: function(pixel) {
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
var geometry = new OpenLayers.Geometry.Point(
lonlat.lon, lonlat.lat
);
this.point = new OpenLayers.Feature.Vector(geometry);
this.line = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LineString([this.point.geometry])
);
this.callback("create", [this.point.geometry, this.getSketch()]);
this.point.geometry.clearBounds();
this.layer.addFeatures([this.line, this.point], {silent: true});
},
/**
* Method: destroyFeature
* Destroy temporary geometries
*
* Parameters:
* force - {Boolean} Destroy even if persist is true.
*/
destroyFeature: function(force) {
OpenLayers.Handler.Point.prototype.destroyFeature.call(
this, force);
this.line = null;
},
/**
* Method: destroyPersistedFeature
* Destroy the persisted feature.
*/
destroyPersistedFeature: function() {
var layer = this.layer;
if(layer && layer.features.length > 2) {
this.layer.features[0].destroy();
}
},
/**
* Method: removePoint
* Destroy the temporary point.
*/
removePoint: function() {
if(this.point) {
this.layer.removeFeatures([this.point]);
}
},
/**
* Method: addPoint
* Add point to geometry. Send the point index to override
* the behavior of LinearRing that disregards adding duplicate points.
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The pixel location for the new point.
*/
addPoint: function(pixel) {
this.layer.removeFeatures([this.point]);
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
this.point = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat)
);
this.line.geometry.addComponent(
this.point.geometry, this.line.geometry.components.length
);
this.layer.addFeatures([this.point]);
this.callback("point", [this.point.geometry, this.getGeometry()]);
this.callback("modify", [this.point.geometry, this.getSketch()]);
this.drawFeature();
delete this.redoStack;
},
/**
* Method: insertXY
* Insert a point in the current sketch given x & y coordinates. The new
* point is inserted immediately before the most recently drawn point.
*
* Parameters:
* x - {Number} The x-coordinate of the point.
* y - {Number} The y-coordinate of the point.
*/
insertXY: function(x, y) {
this.line.geometry.addComponent(
new OpenLayers.Geometry.Point(x, y),
this.getCurrentPointIndex()
);
this.drawFeature();
delete this.redoStack;
},
/**
* Method: insertDeltaXY
* Insert a point given offsets from the previously inserted point.
*
* Parameters:
* dx - {Number} The x-coordinate offset of the point.
* dy - {Number} The y-coordinate offset of the point.
*/
insertDeltaXY: function(dx, dy) {
var previousIndex = this.getCurrentPointIndex() - 1;
var p0 = this.line.geometry.components[previousIndex];
if (p0 && !isNaN(p0.x) && !isNaN(p0.y)) {
this.insertXY(p0.x + dx, p0.y + dy);
}
},
/**
* Method: insertDirectionLength
* Insert a point in the current sketch given a direction and a length.
*
* Parameters:
* direction - {Number} Degrees clockwise from the positive x-axis.
* length - {Number} Distance from the previously drawn point.
*/
insertDirectionLength: function(direction, length) {
direction *= Math.PI / 180;
var dx = length * Math.cos(direction);
var dy = length * Math.sin(direction);
this.insertDeltaXY(dx, dy);
},
/**
* Method: insertDeflectionLength
* Insert a point in the current sketch given a deflection and a length.
* The deflection should be degrees clockwise from the previously
* digitized segment.
*
* Parameters:
* deflection - {Number} Degrees clockwise from the previous segment.
* length - {Number} Distance from the previously drawn point.
*/
insertDeflectionLength: function(deflection, length) {
var previousIndex = this.getCurrentPointIndex() - 1;
if (previousIndex > 0) {
var p1 = this.line.geometry.components[previousIndex];
var p0 = this.line.geometry.components[previousIndex-1];
var theta = Math.atan2(p1.y - p0.y, p1.x - p0.x);
this.insertDirectionLength(
(theta * 180 / Math.PI) + deflection, length
);
}
},
/**
* Method: getCurrentPointIndex
*
* Returns:
* {Number} The index of the most recently drawn point.
*/
getCurrentPointIndex: function() {
return this.line.geometry.components.length - 1;
},
/**
* Method: undo
* Remove the most recently added point in the sketch geometry.
*
* Returns:
* {Boolean} A point was removed.
*/
undo: function() {
var geometry = this.line.geometry;
var components = geometry.components;
var index = this.getCurrentPointIndex() - 1;
var target = components[index];
var undone = geometry.removeComponent(target);
if (undone) {
// On touch devices, set the current ("mouse location") point to
// match the last digitized point.
if (this.touch && index > 0) {
components = geometry.components; // safety
var lastpt = components[index - 1];
var curptidx = this.getCurrentPointIndex();
var curpt = components[curptidx];
curpt.x = lastpt.x;
curpt.y = lastpt.y;
}
if (!this.redoStack) {
this.redoStack = [];
}
this.redoStack.push(target);
this.drawFeature();
}
return undone;
},
/**
* Method: redo
* Reinsert the most recently removed point resulting from an <undo> call.
* The undo stack is deleted whenever a point is added by other means.
*
* Returns:
* {Boolean} A point was added.
*/
redo: function() {
var target = this.redoStack && this.redoStack.pop();
if (target) {
this.line.geometry.addComponent(target, this.getCurrentPointIndex());
this.drawFeature();
}
return !!target;
},
/**
* Method: freehandMode
* Determine whether to behave in freehand mode or not.
*
* Returns:
* {Boolean}
*/
freehandMode: function(evt) {
return (this.freehandToggle && evt[this.freehandToggle]) ?
!this.freehand : this.freehand;
},
/**
* Method: modifyFeature
* Modify the existing geometry given the new point
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The updated pixel location for the latest
* point.
* drawing - {Boolean} Indicate if we're currently drawing.
*/
modifyFeature: function(pixel, drawing) {
if(!this.line) {
this.createFeature(pixel);
}
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
this.point.geometry.x = lonlat.lon;
this.point.geometry.y = lonlat.lat;
this.callback("modify", [this.point.geometry, this.getSketch(), drawing]);
this.point.geometry.clearBounds();
this.drawFeature();
},
/**
* Method: drawFeature
* Render geometries on the temporary layer.
*/
drawFeature: function() {
this.layer.drawFeature(this.line, this.style);
this.layer.drawFeature(this.point, this.style);
},
/**
* Method: getSketch
* Return the sketch feature.
*
* Returns:
* {<OpenLayers.Feature.Vector>}
*/
getSketch: function() {
return this.line;
},
/**
* Method: getGeometry
* Return the sketch geometry. If <multi> is true, this will return
* a multi-part geometry.
*
* Returns:
* {<OpenLayers.Geometry.LineString>}
*/
getGeometry: function() {
var geometry = this.line && this.line.geometry;
if(geometry && this.multi) {
geometry = new OpenLayers.Geometry.MultiLineString([geometry]);
}
return geometry;
},
/**
* method: touchstart
* handle touchstart.
*
* parameters:
* evt - {event} the browser event
*
* returns:
* {boolean} allow event propagation
*/
touchstart: function(evt) {
if (this.timerId &&
this.passesTolerance(this.lastTouchPx, evt.xy,
this.doubleTouchTolerance)) {
// double-tap, finalize the geometry
this.finishGeometry();
window.clearTimeout(this.timerId);
this.timerId = null;
return false;
} else {
if (this.timerId) {
window.clearTimeout(this.timerId);
this.timerId = null;
}
this.timerId = window.setTimeout(
OpenLayers.Function.bind(function() {
this.timerId = null;
}, this), 300);
return OpenLayers.Handler.Point.prototype.touchstart.call(this, evt);
}
},
/**
* Method: down
* Handle mousedown and touchstart. Add a new point to the geometry and
* render it. Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
down: function(evt) {
var stopDown = this.stopDown;
if(this.freehandMode(evt)) {
stopDown = true;
if (this.touch) {
this.modifyFeature(evt.xy, !!this.lastUp);
OpenLayers.Event.stop(evt);
}
}
if (!this.touch && (!this.lastDown ||
!this.passesTolerance(this.lastDown, evt.xy,
this.pixelTolerance))) {
this.modifyFeature(evt.xy, !!this.lastUp);
}
this.mouseDown = true;
this.lastDown = evt.xy;
this.stoppedDown = stopDown;
return !stopDown;
},
/**
* Method: move
* Handle mousemove and touchmove. Adjust the geometry and redraw.
* Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
move: function (evt) {
if(this.stoppedDown && this.freehandMode(evt)) {
if(this.persist) {
this.destroyPersistedFeature();
}
if(this.maxVertices && this.line &&
this.line.geometry.components.length === this.maxVertices) {
this.removePoint();
this.finalize();
} else {
this.addPoint(evt.xy);
}
return false;
}
if (!this.touch && (!this.mouseDown || this.stoppedDown)) {
this.modifyFeature(evt.xy, !!this.lastUp);
}
return true;
},
/**
* Method: up
* Handle mouseup and touchend. Send the latest point in the geometry to
* the control. Return determines whether to propagate the event on the map.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
up: function (evt) {
if (this.mouseDown && (!this.lastUp || !this.lastUp.equals(evt.xy))) {
if(this.stoppedDown && this.freehandMode(evt)) {
if (this.persist) {
this.destroyPersistedFeature();
}
this.removePoint();
this.finalize();
} else {
if (this.passesTolerance(this.lastDown, evt.xy,
this.pixelTolerance)) {
if (this.touch) {
this.modifyFeature(evt.xy);
}
if(this.lastUp == null && this.persist) {
this.destroyPersistedFeature();
}
this.addPoint(evt.xy);
this.lastUp = evt.xy;
if(this.line.geometry.components.length === this.maxVertices + 1) {
this.finishGeometry();
}
}
}
}
this.stoppedDown = this.stopDown;
this.mouseDown = false;
return !this.stopUp;
},
/**
* APIMethod: finishGeometry
* Finish the geometry and send it back to the control.
*/
finishGeometry: function() {
var index = this.line.geometry.components.length - 1;
this.line.geometry.removeComponent(this.line.geometry.components[index]);
this.removePoint();
this.finalize();
},
/**
* Method: dblclick
* Handle double-clicks.
*
* Parameters:
* evt - {Event} The browser event
*
* Returns:
* {Boolean} Allow event propagation
*/
dblclick: function(evt) {
if(!this.freehandMode(evt)) {
this.finishGeometry();
}
return false;
},
CLASS_NAME: "OpenLayers.Handler.Path"
});
/* ======================================================================
OpenLayers/Control/Attribution.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
*/
/**
* Class: OpenLayers.Control.Attribution
* The attribution control adds attribution from layers to the map display.
* It uses 'attribution' property of each layer.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.Attribution =
OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: separator
* {String} String used to separate layers.
*/
separator: ", ",
/**
* APIProperty: template
* {String} Template for the attribution. This has to include the substring
* "${layers}", which will be replaced by the layer specific
* attributions, separated by <separator>. The default is "${layers}".
*/
template: "${layers}",
/**
* Constructor: OpenLayers.Control.Attribution
*
* Parameters:
* options - {Object} Options for control.
*/
/**
* Method: destroy
* Destroy control.
*/
destroy: function() {
this.map.events.un({
"removelayer": this.updateAttribution,
"addlayer": this.updateAttribution,
"changelayer": this.updateAttribution,
"changebaselayer": this.updateAttribution,
scope: this
});
OpenLayers.Control.prototype.destroy.apply(this, arguments);
},
/**
* Method: draw
* Initialize control.
*
* Returns:
* {DOMElement} A reference to the DIV DOMElement containing the control
*/
draw: function() {
OpenLayers.Control.prototype.draw.apply(this, arguments);
this.map.events.on({
'changebaselayer': this.updateAttribution,
'changelayer': this.updateAttribution,
'addlayer': this.updateAttribution,
'removelayer': this.updateAttribution,
scope: this
});
this.updateAttribution();
return this.div;
},
/**
* Method: updateAttribution
* Update attribution string.
*/
updateAttribution: function() {
var attributions = [];
if (this.map && this.map.layers) {
for(var i=0, len=this.map.layers.length; i<len; i++) {
var layer = this.map.layers[i];
if (layer.attribution && layer.getVisibility()) {
// add attribution only if attribution text is unique
if (OpenLayers.Util.indexOf(
attributions, layer.attribution) === -1) {
attributions.push( layer.attribution );
}
}
}
this.div.innerHTML = OpenLayers.String.format(this.template, {
layers: attributions.join(this.separator)
});
}
},
CLASS_NAME: "OpenLayers.Control.Attribution"
});
/* ======================================================================
OpenLayers/Kinetic.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes/Class.js
* @requires OpenLayers/Animation.js
*/
OpenLayers.Kinetic = OpenLayers.Class({
/**
* Property: threshold
* In most cases changing the threshold isn't needed.
* In px/ms, default to 0.
*/
threshold: 0,
/**
* Property: deceleration
* {Float} the deseleration in px/ms², default to 0.0035.
*/
deceleration: 0.0035,
/**
* Property: nbPoints
* {Integer} the number of points we use to calculate the kinetic
* initial values.
*/
nbPoints: 100,
/**
* Property: delay
* {Float} time to consider to calculate the kinetic initial values.
* In ms, default to 200.
*/
delay: 200,
/**
* Property: points
* List of points use to calculate the kinetic initial values.
*/
points: undefined,
/**
* Property: timerId
* ID of the timer.
*/
timerId: undefined,
/**
* Constructor: OpenLayers.Kinetic
*
* Parameters:
* options - {Object}
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
},
/**
* Method: begin
* Begins the dragging.
*/
begin: function() {
OpenLayers.Animation.stop(this.timerId);
this.timerId = undefined;
this.points = [];
},
/**
* Method: update
* Updates during the dragging.
*
* Parameters:
* xy - {<OpenLayers.Pixel>} The new position.
*/
update: function(xy) {
this.points.unshift({xy: xy, tick: new Date().getTime()});
if (this.points.length > this.nbPoints) {
this.points.pop();
}
},
/**
* Method: end
* Ends the dragging, start the kinetic.
*
* Parameters:
* xy - {<OpenLayers.Pixel>} The last position.
*
* Returns:
* {Object} An object with two properties: "speed", and "theta". The
* "speed" and "theta" values are to be passed to the move
* function when starting the animation.
*/
end: function(xy) {
var last, now = new Date().getTime();
for (var i = 0, l = this.points.length, point; i < l; i++) {
point = this.points[i];
if (now - point.tick > this.delay) {
break;
}
last = point;
}
if (!last) {
return;
}
var time = new Date().getTime() - last.tick;
var dist = Math.sqrt(Math.pow(xy.x - last.xy.x, 2) +
Math.pow(xy.y - last.xy.y, 2));
var speed = dist / time;
if (speed == 0 || speed < this.threshold) {
return;
}
var theta = Math.asin((xy.y - last.xy.y) / dist);
if (last.xy.x <= xy.x) {
theta = Math.PI - theta;
}
return {speed: speed, theta: theta};
},
/**
* Method: move
* Launch the kinetic move pan.
*
* Parameters:
* info - {Object} An object with two properties, "speed", and "theta".
* These values are those returned from the "end" call.
* callback - {Function} Function called on every step of the animation,
* receives x, y (values to pan), end (is the last point).
*/
move: function(info, callback) {
var v0 = info.speed;
var fx = Math.cos(info.theta);
var fy = -Math.sin(info.theta);
var initialTime = new Date().getTime();
var lastX = 0;
var lastY = 0;
var timerCallback = function() {
if (this.timerId == null) {
return;
}
var t = new Date().getTime() - initialTime;
var p = (-this.deceleration * Math.pow(t, 2)) / 2.0 + v0 * t;
var x = p * fx;
var y = p * fy;
var args = {};
args.end = false;
var v = -this.deceleration * t + v0;
if (v <= 0) {
OpenLayers.Animation.stop(this.timerId);
this.timerId = null;
args.end = true;
}
args.x = x - lastX;
args.y = y - lastY;
lastX = x;
lastY = y;
callback(args.x, args.y, args.end);
};
this.timerId = OpenLayers.Animation.start(
OpenLayers.Function.bind(timerCallback, this)
);
},
CLASS_NAME: "OpenLayers.Kinetic"
});
/* ======================================================================
OpenLayers/Layer/WMS.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/Grid.js
*/
/**
* Class: OpenLayers.Layer.WMS
* Instances of OpenLayers.Layer.WMS are used to display data from OGC Web
* Mapping Services. Create a new WMS layer with the <OpenLayers.Layer.WMS>
* constructor.
*
* Inherits from:
* - <OpenLayers.Layer.Grid>
*/
OpenLayers.Layer.WMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
/**
* Constant: DEFAULT_PARAMS
* {Object} Hashtable of default parameter key/value pairs
*/
DEFAULT_PARAMS: { service: "WMS",
version: "1.1.1",
request: "GetMap",
styles: "",
format: "image/jpeg"
},
/**
* APIProperty: isBaseLayer
* {Boolean} Default is true for WMS layer
*/
isBaseLayer: true,
/**
* APIProperty: encodeBBOX
* {Boolean} Should the BBOX commas be encoded? The WMS spec says 'no',
* but some services want it that way. Default false.
*/
encodeBBOX: false,
/**
* APIProperty: noMagic
* {Boolean} If true, the image format will not be automagicaly switched
* from image/jpeg to image/png or image/gif when using
* TRANSPARENT=TRUE. Also isBaseLayer will not changed by the
* constructor. Default false.
*/
noMagic: false,
/**
* Property: yx
* {Object} Keys in this object are EPSG codes for which the axis order
* is to be reversed (yx instead of xy, LatLon instead of LonLat), with
* true as value. This is only relevant for WMS versions >= 1.3.0, and
* only if yx is not set in <OpenLayers.Projection.defaults> for the
* used projection.
*/
yx: {},
/**
* Constructor: OpenLayers.Layer.WMS
* Create a new WMS layer object
*
* Examples:
*
* The code below creates a simple WMS layer using the image/jpeg format.
* (code)
* var wms = new OpenLayers.Layer.WMS("NASA Global Mosaic",
* "http://wms.jpl.nasa.gov/wms.cgi",
* {layers: "modis,global_mosaic"});
* (end)
* Note the 3rd argument (params). Properties added to this object will be
* added to the WMS GetMap requests used for this layer's tiles. The only
* mandatory parameter is "layers". Other common WMS params include
* "transparent", "styles" and "format". Note that the "srs" param will
* always be ignored. Instead, it will be derived from the baseLayer's or
* map's projection.
*
* The code below creates a transparent WMS layer with additional options.
* (code)
* var wms = new OpenLayers.Layer.WMS("NASA Global Mosaic",
* "http://wms.jpl.nasa.gov/wms.cgi",
* {
* layers: "modis,global_mosaic",
* transparent: true
* }, {
* opacity: 0.5,
* singleTile: true
* });
* (end)
* Note that by default, a WMS layer is configured as baseLayer. Setting
* the "transparent" param to true will apply some magic (see <noMagic>).
* The default image format changes from image/jpeg to image/png, and the
* layer is not configured as baseLayer.
*
* Parameters:
* name - {String} A name for the layer
* url - {String} Base url for the WMS
* (e.g. http://wms.jpl.nasa.gov/wms.cgi)
* params - {Object} An object with key/value pairs representing the
* GetMap query string parameters and parameter values.
* options - {Object} Hashtable of extra options to tag onto the layer.
* These options include all properties listed above, plus the ones
* inherited from superclasses.
*/
initialize: function(name, url, params, options) {
var newArguments = [];
//uppercase params
params = OpenLayers.Util.upperCaseObject(params);
if (parseFloat(params.VERSION) >= 1.3 && !params.EXCEPTIONS) {
params.EXCEPTIONS = "INIMAGE";
}
newArguments.push(name, url, params, options);
OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
OpenLayers.Util.applyDefaults(
this.params,
OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS)
);
//layer is transparent
if (!this.noMagic && this.params.TRANSPARENT &&
this.params.TRANSPARENT.toString().toLowerCase() == "true") {
// unless explicitly set in options, make layer an overlay
if ( (options == null) || (!options.isBaseLayer) ) {
this.isBaseLayer = false;
}
// jpegs can never be transparent, so intelligently switch the
// format, depending on the browser's capabilities
if (this.params.FORMAT == "image/jpeg") {
this.params.FORMAT = OpenLayers.Util.alphaHack() ? "image/gif"
: "image/png";
}
}
},
/**
* Method: clone
* Create a clone of this layer
*
* Returns:
* {<OpenLayers.Layer.WMS>} An exact clone of this layer
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.WMS(this.name,
this.url,
this.params,
this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
return obj;
},
/**
* APIMethod: reverseAxisOrder
* Returns true if the axis order is reversed for the WMS version and
* projection of the layer.
*
* Returns:
* {Boolean} true if the axis order is reversed, false otherwise.
*/
reverseAxisOrder: function() {
var projCode = this.projection.getCode();
return parseFloat(this.params.VERSION) >= 1.3 &&
!!(this.yx[projCode] || (OpenLayers.Projection.defaults[projCode] &&
OpenLayers.Projection.defaults[projCode].yx));
},
/**
* Method: getURL
* Return a GetMap query string for this layer
*
* Parameters:
* bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
* request.
*
* Returns:
* {String} A string with the layer's url and parameters and also the
* passed-in bounds and appropriate tile size specified as
* parameters.
*/
getURL: function (bounds) {
bounds = this.adjustBounds(bounds);
var imageSize = this.getImageSize();
var newParams = {};
// WMS 1.3 introduced axis order
var reverseAxisOrder = this.reverseAxisOrder();
newParams.BBOX = this.encodeBBOX ?
bounds.toBBOX(null, reverseAxisOrder) :
bounds.toArray(reverseAxisOrder);
newParams.WIDTH = imageSize.w;
newParams.HEIGHT = imageSize.h;
var requestString = this.getFullRequestString(newParams);
return requestString;
},
/**
* APIMethod: mergeNewParams
* Catch changeParams and uppercase the new params to be merged in
* before calling changeParams on the super class.
*
* Once params have been changed, the tiles will be reloaded with
* the new parameters.
*
* Parameters:
* newParams - {Object} Hashtable of new params to use
*/
mergeNewParams:function(newParams) {
var upperParams = OpenLayers.Util.upperCaseObject(newParams);
var newArguments = [upperParams];
return OpenLayers.Layer.Grid.prototype.mergeNewParams.apply(this,
newArguments);
},
/**
* APIMethod: getFullRequestString
* Combine the layer's url with its params and these newParams.
*
* Add the SRS parameter from projection -- this is probably
* more eloquently done via a setProjection() method, but this
* works for now and always.
*
* Parameters:
* newParams - {Object}
* altUrl - {String} Use this as the url instead of the layer's url
*
* Returns:
* {String}
*/
getFullRequestString:function(newParams, altUrl) {
var mapProjection = this.map.getProjectionObject();
var projectionCode = this.projection && this.projection.equals(mapProjection) ?
this.projection.getCode() :
mapProjection.getCode();
var value = (projectionCode == "none") ? null : projectionCode;
if (parseFloat(this.params.VERSION) >= 1.3) {
this.params.CRS = value;
} else {
this.params.SRS = value;
}
if (typeof this.params.TRANSPARENT == "boolean") {
newParams.TRANSPARENT = this.params.TRANSPARENT ? "TRUE" : "FALSE";
}
return OpenLayers.Layer.Grid.prototype.getFullRequestString.apply(
this, arguments);
},
CLASS_NAME: "OpenLayers.Layer.WMS"
});
/* ======================================================================
OpenLayers/Renderer/SVG.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Renderer/Elements.js
*/
/**
* Class: OpenLayers.Renderer.SVG
*
* Inherits:
* - <OpenLayers.Renderer.Elements>
*/
OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {
/**
* Property: xmlns
* {String}
*/
xmlns: "http://www.w3.org/2000/svg",
/**
* Property: xlinkns
* {String}
*/
xlinkns: "http://www.w3.org/1999/xlink",
/**
* Constant: MAX_PIXEL
* {Integer} Firefox has a limitation where values larger or smaller than
* about 15000 in an SVG document lock the browser up. This
* works around it.
*/
MAX_PIXEL: 15000,
/**
* Property: translationParameters
* {Object} Hash with "x" and "y" properties
*/
translationParameters: null,
/**
* Property: symbolMetrics
* {Object} Cache for symbol metrics according to their svg coordinate
* space. This is an object keyed by the symbol's id, and values are
* an array of [width, centerX, centerY].
*/
symbolMetrics: null,
/**
* Constructor: OpenLayers.Renderer.SVG
*
* Parameters:
* containerID - {String}
*/
initialize: function(containerID) {
if (!this.supported()) {
return;
}
OpenLayers.Renderer.Elements.prototype.initialize.apply(this,
arguments);
this.translationParameters = {x: 0, y: 0};
this.symbolMetrics = {};
},
/**
* APIMethod: supported
*
* Returns:
* {Boolean} Whether or not the browser supports the SVG renderer
*/
supported: function() {
var svgFeature = "http://www.w3.org/TR/SVG11/feature#";
return (document.implementation &&
(document.implementation.hasFeature("org.w3c.svg", "1.0") ||
document.implementation.hasFeature(svgFeature + "SVG", "1.1") ||
document.implementation.hasFeature(svgFeature + "BasicStructure", "1.1") ));
},
/**
* Method: inValidRange
* See #669 for more information
*
* Parameters:
* x - {Integer}
* y - {Integer}
* xyOnly - {Boolean} whether or not to just check for x and y, which means
* to not take the current translation parameters into account if true.
*
* Returns:
* {Boolean} Whether or not the 'x' and 'y' coordinates are in the
* valid range.
*/
inValidRange: function(x, y, xyOnly) {
var left = x + (xyOnly ? 0 : this.translationParameters.x);
var top = y + (xyOnly ? 0 : this.translationParameters.y);
return (left >= -this.MAX_PIXEL && left <= this.MAX_PIXEL &&
top >= -this.MAX_PIXEL && top <= this.MAX_PIXEL);
},
/**
* Method: setExtent
*
* Parameters:
* extent - {<OpenLayers.Bounds>}
* resolutionChanged - {Boolean}
*
* Returns:
* {Boolean} true to notify the layer that the new extent does not exceed
* the coordinate range, and the features will not need to be redrawn.
* False otherwise.
*/
setExtent: function(extent, resolutionChanged) {
var coordSysUnchanged = OpenLayers.Renderer.Elements.prototype.setExtent.apply(this, arguments);
var resolution = this.getResolution(),
left = -extent.left / resolution,
top = extent.top / resolution;
// If the resolution has changed, start over changing the corner, because
// the features will redraw.
if (resolutionChanged) {
this.left = left;
this.top = top;
// Set the viewbox
var extentString = "0 0 " + this.size.w + " " + this.size.h;
this.rendererRoot.setAttributeNS(null, "viewBox", extentString);
this.translate(this.xOffset, 0);
return true;
} else {
var inRange = this.translate(left - this.left + this.xOffset, top - this.top);
if (!inRange) {
// recenter the coordinate system
this.setExtent(extent, true);
}
return coordSysUnchanged && inRange;
}
},
/**
* Method: translate
* Transforms the SVG coordinate system
*
* Parameters:
* x - {Float}
* y - {Float}
*
* Returns:
* {Boolean} true if the translation parameters are in the valid coordinates
* range, false otherwise.
*/
translate: function(x, y) {
if (!this.inValidRange(x, y, true)) {
return false;
} else {
var transformString = "";
if (x || y) {
transformString = "translate(" + x + "," + y + ")";
}
this.root.setAttributeNS(null, "transform", transformString);
this.translationParameters = {x: x, y: y};
return true;
}
},
/**
* Method: setSize
* Sets the size of the drawing surface.
*
* Parameters:
* size - {<OpenLayers.Size>} The size of the drawing surface
*/
setSize: function(size) {
OpenLayers.Renderer.prototype.setSize.apply(this, arguments);
this.rendererRoot.setAttributeNS(null, "width", this.size.w);
this.rendererRoot.setAttributeNS(null, "height", this.size.h);
},
/**
* Method: getNodeType
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
* style - {Object}
*
* Returns:
* {String} The corresponding node type for the specified geometry
*/
getNodeType: function(geometry, style) {
var nodeType = null;
switch (geometry.CLASS_NAME) {
case "OpenLayers.Geometry.Point":
if (style.externalGraphic) {
nodeType = "image";
} else if (this.isComplexSymbol(style.graphicName)) {
nodeType = "svg";
} else {
nodeType = "circle";
}
break;
case "OpenLayers.Geometry.Rectangle":
nodeType = "rect";
break;
case "OpenLayers.Geometry.LineString":
nodeType = "polyline";
break;
case "OpenLayers.Geometry.LinearRing":
nodeType = "polygon";
break;
case "OpenLayers.Geometry.Polygon":
case "OpenLayers.Geometry.Curve":
nodeType = "path";
break;
default:
break;
}
return nodeType;
},
/**
* Method: setStyle
* Use to set all the style attributes to a SVG node.
*
* Takes care to adjust stroke width and point radius to be
* resolution-relative
*
* Parameters:
* node - {SVGDomElement} An SVG element to decorate
* style - {Object}
* options - {Object} Currently supported options include
* 'isFilled' {Boolean} and
* 'isStroked' {Boolean}
*/
setStyle: function(node, style, options) {
style = style || node._style;
options = options || node._options;
var title = style.title || style.graphicTitle;
if (title) {
node.setAttributeNS(null, "title", title);
//Standards-conformant SVG
// Prevent duplicate nodes. See issue https://github.com/openlayers/openlayers/issues/92
var titleNode = node.getElementsByTagName("title");
if (titleNode.length > 0) {
titleNode[0].firstChild.textContent = title;
} else {
var label = this.nodeFactory(null, "title");
label.textContent = title;
node.appendChild(label);
}
}
var r = parseFloat(node.getAttributeNS(null, "r"));
var widthFactor = 1;
var pos;
if (node._geometryClass == "OpenLayers.Geometry.Point" && r) {
node.style.visibility = "";
if (style.graphic === false) {
node.style.visibility = "hidden";
} else if (style.externalGraphic) {
pos = this.getPosition(node);
if (style.graphicWidth && style.graphicHeight) {
node.setAttributeNS(null, "preserveAspectRatio", "none");
}
var width = style.graphicWidth || style.graphicHeight;
var height = style.graphicHeight || style.graphicWidth;
width = width ? width : style.pointRadius*2;
height = height ? height : style.pointRadius*2;
var xOffset = (style.graphicXOffset != undefined) ?
style.graphicXOffset : -(0.5 * width);
var yOffset = (style.graphicYOffset != undefined) ?
style.graphicYOffset : -(0.5 * height);
var opacity = style.graphicOpacity || style.fillOpacity;
node.setAttributeNS(null, "x", (pos.x + xOffset).toFixed());
node.setAttributeNS(null, "y", (pos.y + yOffset).toFixed());
node.setAttributeNS(null, "width", width);
node.setAttributeNS(null, "height", height);
node.setAttributeNS(this.xlinkns, "xlink:href", style.externalGraphic);
node.setAttributeNS(null, "style", "opacity: "+opacity);
node.onclick = OpenLayers.Event.preventDefault;
} else if (this.isComplexSymbol(style.graphicName)) {
// the symbol viewBox is three times as large as the symbol
var offset = style.pointRadius * 3;
var size = offset * 2;
var src = this.importSymbol(style.graphicName);
pos = this.getPosition(node);
widthFactor = this.symbolMetrics[src.id][0] * 3 / size;
// remove the node from the dom before we modify it. This
// prevents various rendering issues in Safari and FF
var parent = node.parentNode;
var nextSibling = node.nextSibling;
if(parent) {
parent.removeChild(node);
}
// The more appropriate way to implement this would be use/defs,
// but due to various issues in several browsers, it is safer to
// copy the symbols instead of referencing them.
// See e.g. ticket http://trac.osgeo.org/openlayers/ticket/2985
// and this email thread
// http://osgeo-org.1803224.n2.nabble.com/Select-Control-Ctrl-click-on-Feature-with-a-graphicName-opens-new-browser-window-tc5846039.html
node.firstChild && node.removeChild(node.firstChild);
node.appendChild(src.firstChild.cloneNode(true));
node.setAttributeNS(null, "viewBox", src.getAttributeNS(null, "viewBox"));
node.setAttributeNS(null, "width", size);
node.setAttributeNS(null, "height", size);
node.setAttributeNS(null, "x", pos.x - offset);
node.setAttributeNS(null, "y", pos.y - offset);
// now that the node has all its new properties, insert it
// back into the dom where it was
if(nextSibling) {
parent.insertBefore(node, nextSibling);
} else if(parent) {
parent.appendChild(node);
}
} else {
node.setAttributeNS(null, "r", style.pointRadius);
}
var rotation = style.rotation;
if ((rotation !== undefined || node._rotation !== undefined) && pos) {
node._rotation = rotation;
rotation |= 0;
if (node.nodeName !== "svg") {
node.setAttributeNS(null, "transform",
"rotate(" + rotation + " " + pos.x + " " +
pos.y + ")");
} else {
var metrics = this.symbolMetrics[src.id];
node.firstChild.setAttributeNS(null, "transform", "rotate("
+ rotation + " "
+ metrics[1] + " "
+ metrics[2] + ")");
}
}
}
if (options.isFilled) {
node.setAttributeNS(null, "fill", style.fillColor);
node.setAttributeNS(null, "fill-opacity", style.fillOpacity);
} else {
node.setAttributeNS(null, "fill", "none");
}
if (options.isStroked) {
node.setAttributeNS(null, "stroke", style.strokeColor);
node.setAttributeNS(null, "stroke-opacity", style.strokeOpacity);
node.setAttributeNS(null, "stroke-width", style.strokeWidth * widthFactor);
node.setAttributeNS(null, "stroke-linecap", style.strokeLinecap || "round");
// Hard-coded linejoin for now, to make it look the same as in VML.
// There is no strokeLinejoin property yet for symbolizers.
node.setAttributeNS(null, "stroke-linejoin", "round");
style.strokeDashstyle && node.setAttributeNS(null,
"stroke-dasharray", this.dashStyle(style, widthFactor));
} else {
node.setAttributeNS(null, "stroke", "none");
}
if (style.pointerEvents) {
node.setAttributeNS(null, "pointer-events", style.pointerEvents);
}
if (style.cursor != null) {
node.setAttributeNS(null, "cursor", style.cursor);
}
return node;
},
/**
* Method: dashStyle
*
* Parameters:
* style - {Object}
* widthFactor - {Number}
*
* Returns:
* {String} A SVG compliant 'stroke-dasharray' value
*/
dashStyle: function(style, widthFactor) {
var w = style.strokeWidth * widthFactor;
var str = style.strokeDashstyle;
switch (str) {
case 'solid':
return 'none';
case 'dot':
return [1, 4 * w].join();
case 'dash':
return [4 * w, 4 * w].join();
case 'dashdot':
return [4 * w, 4 * w, 1, 4 * w].join();
case 'longdash':
return [8 * w, 4 * w].join();
case 'longdashdot':
return [8 * w, 4 * w, 1, 4 * w].join();
default:
return OpenLayers.String.trim(str).replace(/\s+/g, ",");
}
},
/**
* Method: createNode
*
* Parameters:
* type - {String} Kind of node to draw
* id - {String} Id for node
*
* Returns:
* {DOMElement} A new node of the given type and id
*/
createNode: function(type, id) {
var node = document.createElementNS(this.xmlns, type);
if (id) {
node.setAttributeNS(null, "id", id);
}
return node;
},
/**
* Method: nodeTypeCompare
*
* Parameters:
* node - {SVGDomElement} An SVG element
* type - {String} Kind of node
*
* Returns:
* {Boolean} Whether or not the specified node is of the specified type
*/
nodeTypeCompare: function(node, type) {
return (type == node.nodeName);
},
/**
* Method: createRenderRoot
*
* Returns:
* {DOMElement} The specific render engine's root element
*/
createRenderRoot: function() {
var svg = this.nodeFactory(this.container.id + "_svgRoot", "svg");
svg.style.display = "block";
return svg;
},
/**
* Method: createRoot
*
* Parameters:
* suffix - {String} suffix to append to the id
*
* Returns:
* {DOMElement}
*/
createRoot: function(suffix) {
return this.nodeFactory(this.container.id + suffix, "g");
},
/**
* Method: createDefs
*
* Returns:
* {DOMElement} The element to which we'll add the symbol definitions
*/
createDefs: function() {
var defs = this.nodeFactory(this.container.id + "_defs", "defs");
this.rendererRoot.appendChild(defs);
return defs;
},
/**************************************
* *
* GEOMETRY DRAWING FUNCTIONS *
* *
**************************************/
/**
* Method: drawPoint
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the point
*/
drawPoint: function(node, geometry) {
return this.drawCircle(node, geometry, 1);
},
/**
* Method: drawCircle
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
* radius - {Float}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the circle
*/
drawCircle: function(node, geometry, radius) {
var resolution = this.getResolution();
var x = ((geometry.x - this.featureDx) / resolution + this.left);
var y = (this.top - geometry.y / resolution);
if (this.inValidRange(x, y)) {
node.setAttributeNS(null, "cx", x);
node.setAttributeNS(null, "cy", y);
node.setAttributeNS(null, "r", radius);
return node;
} else {
return false;
}
},
/**
* Method: drawLineString
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components of
* the linestring, or false if nothing could be drawn
*/
drawLineString: function(node, geometry) {
var componentsResult = this.getComponentsString(geometry.components);
if (componentsResult.path) {
node.setAttributeNS(null, "points", componentsResult.path);
return (componentsResult.complete ? node : null);
} else {
return false;
}
},
/**
* Method: drawLinearRing
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components
* of the linear ring, or false if nothing could be drawn
*/
drawLinearRing: function(node, geometry) {
var componentsResult = this.getComponentsString(geometry.components);
if (componentsResult.path) {
node.setAttributeNS(null, "points", componentsResult.path);
return (componentsResult.complete ? node : null);
} else {
return false;
}
},
/**
* Method: drawPolygon
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or null if the renderer could not draw all components
* of the polygon, or false if nothing could be drawn
*/
drawPolygon: function(node, geometry) {
var d = "";
var draw = true;
var complete = true;
var linearRingResult, path;
for (var j=0, len=geometry.components.length; j<len; j++) {
d += " M";
linearRingResult = this.getComponentsString(
geometry.components[j].components, " ");
path = linearRingResult.path;
if (path) {
d += " " + path;
complete = linearRingResult.complete && complete;
} else {
draw = false;
}
}
d += " z";
if (draw) {
node.setAttributeNS(null, "d", d);
node.setAttributeNS(null, "fill-rule", "evenodd");
return complete ? node : null;
} else {
return false;
}
},
/**
* Method: drawRectangle
* This method is only called by the renderer itself.
*
* Parameters:
* node - {DOMElement}
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {DOMElement} or false if the renderer could not draw the rectangle
*/
drawRectangle: function(node, geometry) {
var resolution = this.getResolution();
var x = ((geometry.x - this.featureDx) / resolution + this.left);
var y = (this.top - geometry.y / resolution);
if (this.inValidRange(x, y)) {
node.setAttributeNS(null, "x", x);
node.setAttributeNS(null, "y", y);
node.setAttributeNS(null, "width", geometry.width / resolution);
node.setAttributeNS(null, "height", geometry.height / resolution);
return node;
} else {
return false;
}
},
/**
* Method: drawText
* This method is only called by the renderer itself.
*
* Parameters:
* featureId - {String}
* style -
* location - {<OpenLayers.Geometry.Point>}
*/
drawText: function(featureId, style, location) {
var drawOutline = (!!style.labelOutlineWidth);
// First draw text in halo color and size and overlay the
// normal text afterwards
if (drawOutline) {
var outlineStyle = OpenLayers.Util.extend({}, style);
outlineStyle.fontColor = outlineStyle.labelOutlineColor;
outlineStyle.fontStrokeColor = outlineStyle.labelOutlineColor;
outlineStyle.fontStrokeWidth = style.labelOutlineWidth;
if (style.labelOutlineOpacity) {
outlineStyle.fontOpacity = style.labelOutlineOpacity;
}
delete outlineStyle.labelOutlineWidth;
this.drawText(featureId, outlineStyle, location);
}
var resolution = this.getResolution();
var x = ((location.x - this.featureDx) / resolution + this.left);
var y = (location.y / resolution - this.top);
var suffix = (drawOutline)?this.LABEL_OUTLINE_SUFFIX:this.LABEL_ID_SUFFIX;
var label = this.nodeFactory(featureId + suffix, "text");
label.setAttributeNS(null, "x", x);
label.setAttributeNS(null, "y", -y);
if (style.fontColor) {
label.setAttributeNS(null, "fill", style.fontColor);
}
if (style.fontStrokeColor) {
label.setAttributeNS(null, "stroke", style.fontStrokeColor);
}
if (style.fontStrokeWidth) {
label.setAttributeNS(null, "stroke-width", style.fontStrokeWidth);
}
if (style.fontOpacity) {
label.setAttributeNS(null, "opacity", style.fontOpacity);
}
if (style.fontFamily) {
label.setAttributeNS(null, "font-family", style.fontFamily);
}
if (style.fontSize) {
label.setAttributeNS(null, "font-size", style.fontSize);
}
if (style.fontWeight) {
label.setAttributeNS(null, "font-weight", style.fontWeight);
}
if (style.fontStyle) {
label.setAttributeNS(null, "font-style", style.fontStyle);
}
if (style.labelSelect === true) {
label.setAttributeNS(null, "pointer-events", "visible");
label._featureId = featureId;
} else {
label.setAttributeNS(null, "pointer-events", "none");
}
var align = style.labelAlign || OpenLayers.Renderer.defaultSymbolizer.labelAlign;
label.setAttributeNS(null, "text-anchor",
OpenLayers.Renderer.SVG.LABEL_ALIGN[align[0]] || "middle");
if (OpenLayers.IS_GECKO === true) {
label.setAttributeNS(null, "dominant-baseline",
OpenLayers.Renderer.SVG.LABEL_ALIGN[align[1]] || "central");
}
var labelRows = style.label.split('\n');
var numRows = labelRows.length;
while (label.childNodes.length > numRows) {
label.removeChild(label.lastChild);
}
for (var i = 0; i < numRows; i++) {
var tspan = this.nodeFactory(featureId + suffix + "_tspan_" + i, "tspan");
if (style.labelSelect === true) {
tspan._featureId = featureId;
tspan._geometry = location;
tspan._geometryClass = location.CLASS_NAME;
}
if (OpenLayers.IS_GECKO === false) {
tspan.setAttributeNS(null, "baseline-shift",
OpenLayers.Renderer.SVG.LABEL_VSHIFT[align[1]] || "-35%");
}
tspan.setAttribute("x", x);
if (i == 0) {
var vfactor = OpenLayers.Renderer.SVG.LABEL_VFACTOR[align[1]];
if (vfactor == null) {
vfactor = -.5;
}
tspan.setAttribute("dy", (vfactor*(numRows-1)) + "em");
} else {
tspan.setAttribute("dy", "1em");
}
tspan.textContent = (labelRows[i] === '') ? ' ' : labelRows[i];
if (!tspan.parentNode) {
label.appendChild(tspan);
}
}
if (!label.parentNode) {
this.textRoot.appendChild(label);
}
},
/**
* Method: getComponentString
*
* Parameters:
* components - {Array(<OpenLayers.Geometry.Point>)} Array of points
* separator - {String} character between coordinate pairs. Defaults to ","
*
* Returns:
* {Object} hash with properties "path" (the string created from the
* components and "complete" (false if the renderer was unable to
* draw all components)
*/
getComponentsString: function(components, separator) {
var renderCmp = [];
var complete = true;
var len = components.length;
var strings = [];
var str, component;
for(var i=0; i<len; i++) {
component = components[i];
renderCmp.push(component);
str = this.getShortString(component);
if (str) {
strings.push(str);
} else {
// The current component is outside the valid range. Let's
// see if the previous or next component is inside the range.
// If so, add the coordinate of the intersection with the
// valid range bounds.
if (i > 0) {
if (this.getShortString(components[i - 1])) {
strings.push(this.clipLine(components[i],
components[i-1]));
}
}
if (i < len - 1) {
if (this.getShortString(components[i + 1])) {
strings.push(this.clipLine(components[i],
components[i+1]));
}
}
complete = false;
}
}
return {
path: strings.join(separator || ","),
complete: complete
};
},
/**
* Method: clipLine
* Given two points (one inside the valid range, and one outside),
* clips the line betweeen the two points so that the new points are both
* inside the valid range.
*
* Parameters:
* badComponent - {<OpenLayers.Geometry.Point>} original geometry of the
* invalid point
* goodComponent - {<OpenLayers.Geometry.Point>} original geometry of the
* valid point
* Returns
* {String} the SVG coordinate pair of the clipped point (like
* getShortString), or an empty string if both passed componets are at
* the same point.
*/
clipLine: function(badComponent, goodComponent) {
if (goodComponent.equals(badComponent)) {
return "";
}
var resolution = this.getResolution();
var maxX = this.MAX_PIXEL - this.translationParameters.x;
var maxY = this.MAX_PIXEL - this.translationParameters.y;
var x1 = (goodComponent.x - this.featureDx) / resolution + this.left;
var y1 = this.top - goodComponent.y / resolution;
var x2 = (badComponent.x - this.featureDx) / resolution + this.left;
var y2 = this.top - badComponent.y / resolution;
var k;
if (x2 < -maxX || x2 > maxX) {
k = (y2 - y1) / (x2 - x1);
x2 = x2 < 0 ? -maxX : maxX;
y2 = y1 + (x2 - x1) * k;
}
if (y2 < -maxY || y2 > maxY) {
k = (x2 - x1) / (y2 - y1);
y2 = y2 < 0 ? -maxY : maxY;
x2 = x1 + (y2 - y1) * k;
}
return x2 + "," + y2;
},
/**
* Method: getShortString
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns:
* {String} or false if point is outside the valid range
*/
getShortString: function(point) {
var resolution = this.getResolution();
var x = ((point.x - this.featureDx) / resolution + this.left);
var y = (this.top - point.y / resolution);
if (this.inValidRange(x, y)) {
return x + "," + y;
} else {
return false;
}
},
/**
* Method: getPosition
* Finds the position of an svg node.
*
* Parameters:
* node - {DOMElement}
*
* Returns:
* {Object} hash with x and y properties, representing the coordinates
* within the svg coordinate system
*/
getPosition: function(node) {
return({
x: parseFloat(node.getAttributeNS(null, "cx")),
y: parseFloat(node.getAttributeNS(null, "cy"))
});
},
/**
* Method: importSymbol
* add a new symbol definition from the rendererer's symbol hash
*
* Parameters:
* graphicName - {String} name of the symbol to import
*
* Returns:
* {DOMElement} - the imported symbol
*/
importSymbol: function (graphicName) {
if (!this.defs) {
// create svg defs tag
this.defs = this.createDefs();
}
var id = this.container.id + "-" + graphicName;
// check if symbol already exists in the defs
var existing = document.getElementById(id);
if (existing != null) {
return existing;
}
var symbol = OpenLayers.Renderer.symbol[graphicName];
if (!symbol) {
throw new Error(graphicName + ' is not a valid symbol name');
}
var symbolNode = this.nodeFactory(id, "symbol");
var node = this.nodeFactory(null, "polygon");
symbolNode.appendChild(node);
var symbolExtent = new OpenLayers.Bounds(
Number.MAX_VALUE, Number.MAX_VALUE, 0, 0);
var points = [];
var x,y;
for (var i=0; i<symbol.length; i=i+2) {
x = symbol[i];
y = symbol[i+1];
symbolExtent.left = Math.min(symbolExtent.left, x);
symbolExtent.bottom = Math.min(symbolExtent.bottom, y);
symbolExtent.right = Math.max(symbolExtent.right, x);
symbolExtent.top = Math.max(symbolExtent.top, y);
points.push(x, ",", y);
}
node.setAttributeNS(null, "points", points.join(" "));
var width = symbolExtent.getWidth();
var height = symbolExtent.getHeight();
// create a viewBox three times as large as the symbol itself,
// to allow for strokeWidth being displayed correctly at the corners.
var viewBox = [symbolExtent.left - width,
symbolExtent.bottom - height, width * 3, height * 3];
symbolNode.setAttributeNS(null, "viewBox", viewBox.join(" "));
this.symbolMetrics[id] = [
Math.max(width, height),
symbolExtent.getCenterLonLat().lon,
symbolExtent.getCenterLonLat().lat
];
this.defs.appendChild(symbolNode);
return symbolNode;
},
/**
* Method: getFeatureIdFromEvent
*
* Parameters:
* evt - {Object} An <OpenLayers.Event> object
*
* Returns:
* {String} A feature id or undefined.
*/
getFeatureIdFromEvent: function(evt) {
var featureId = OpenLayers.Renderer.Elements.prototype.getFeatureIdFromEvent.apply(this, arguments);
if(!featureId) {
var target = evt.target;
featureId = target.parentNode && target != this.rendererRoot ?
target.parentNode._featureId : undefined;
}
return featureId;
},
CLASS_NAME: "OpenLayers.Renderer.SVG"
});
/**
* Constant: OpenLayers.Renderer.SVG.LABEL_ALIGN
* {Object}
*/
OpenLayers.Renderer.SVG.LABEL_ALIGN = {
"l": "start",
"r": "end",
"b": "bottom",
"t": "hanging"
};
/**
* Constant: OpenLayers.Renderer.SVG.LABEL_VSHIFT
* {Object}
*/
OpenLayers.Renderer.SVG.LABEL_VSHIFT = {
// according to
// http://www.w3.org/Graphics/SVG/Test/20061213/htmlObjectHarness/full-text-align-02-b.html
// a baseline-shift of -70% shifts the text exactly from the
// bottom to the top of the baseline, so -35% moves the text to
// the center of the baseline.
"t": "-70%",
"b": "0"
};
/**
* Constant: OpenLayers.Renderer.SVG.LABEL_VFACTOR
* {Object}
*/
OpenLayers.Renderer.SVG.LABEL_VFACTOR = {
"t": 0,
"b": -1
};
/**
* Function: OpenLayers.Renderer.SVG.preventDefault
* *Deprecated*. Use <OpenLayers.Event.preventDefault> method instead.
* Used to prevent default events (especially opening images in a new tab on
* ctrl-click) from being executed for externalGraphic symbols
*/
OpenLayers.Renderer.SVG.preventDefault = function(e) {
OpenLayers.Event.preventDefault(e);
};
/* ======================================================================
OpenLayers/Format/JSON.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* Note:
* This work draws heavily from the public domain JSON serializer/deserializer
* at http://www.json.org/json.js. Rewritten so that it doesn't modify
* basic data prototypes.
*/
/**
* @requires OpenLayers/Format.js
*/
/**
* Class: OpenLayers.Format.JSON
* A parser to read/write JSON safely. Create a new instance with the
* <OpenLayers.Format.JSON> constructor.
*
* Inherits from:
* - <OpenLayers.Format>
*/
OpenLayers.Format.JSON = OpenLayers.Class(OpenLayers.Format, {
/**
* APIProperty: indent
* {String} For "pretty" printing, the indent string will be used once for
* each indentation level.
*/
indent: " ",
/**
* APIProperty: space
* {String} For "pretty" printing, the space string will be used after
* the ":" separating a name/value pair.
*/
space: " ",
/**
* APIProperty: newline
* {String} For "pretty" printing, the newline string will be used at the
* end of each name/value pair or array item.
*/
newline: "\n",
/**
* Property: level
* {Integer} For "pretty" printing, this is incremented/decremented during
* serialization.
*/
level: 0,
/**
* Property: pretty
* {Boolean} Serialize with extra whitespace for structure. This is set
* by the <write> method.
*/
pretty: false,
/**
* Property: nativeJSON
* {Boolean} Does the browser support native json?
*/
nativeJSON: (function() {
return !!(window.JSON && typeof JSON.parse == "function" && typeof JSON.stringify == "function");
})(),
/**
* Constructor: OpenLayers.Format.JSON
* Create a new parser for JSON.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
/**
* APIMethod: read
* Deserialize a json string.
*
* Parameters:
* json - {String} A JSON string
* filter - {Function} A function which will be called for every key and
* value at every level of the final result. Each value will be
* replaced by the result of the filter function. This can be used to
* reform generic objects into instances of classes, or to transform
* date strings into Date objects.
*
* Returns:
* {Object} An object, array, string, or number .
*/
read: function(json, filter) {
var object;
if (this.nativeJSON) {
object = JSON.parse(json, filter);
} else try {
/**
* Parsing happens in three stages. In the first stage, we run the
* text against a regular expression which looks for non-JSON
* characters. We are especially concerned with '()' and 'new'
* because they can cause invocation, and '=' because it can
* cause mutation. But just to be safe, we will reject all
* unexpected characters.
*/
if (/^[\],:{}\s]*$/.test(json.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
/**
* In the second stage we use the eval function to compile the
* text into a JavaScript structure. The '{' operator is
* subject to a syntactic ambiguity in JavaScript - it can
* begin a block or an object literal. We wrap the text in
* parens to eliminate the ambiguity.
*/
object = eval('(' + json + ')');
/**
* In the optional third stage, we recursively walk the new
* structure, passing each name/value pair to a filter
* function for possible transformation.
*/
if(typeof filter === 'function') {
function walk(k, v) {
if(v && typeof v === 'object') {
for(var i in v) {
if(v.hasOwnProperty(i)) {
v[i] = walk(i, v[i]);
}
}
}
return filter(k, v);
}
object = walk('', object);
}
}
} catch(e) {
// Fall through if the regexp test fails.
}
if(this.keepData) {
this.data = object;
}
return object;
},
/**
* APIMethod: write
* Serialize an object into a JSON string.
*
* Parameters:
* value - {String} The object, array, string, number, boolean or date
* to be serialized.
* pretty - {Boolean} Structure the output with newlines and indentation.
* Default is false.
*
* Returns:
* {String} The JSON string representation of the input value.
*/
write: function(value, pretty) {
this.pretty = !!pretty;
var json = null;
var type = typeof value;
if(this.serialize[type]) {
try {
json = (!this.pretty && this.nativeJSON) ?
JSON.stringify(value) :
this.serialize[type].apply(this, [value]);
} catch(err) {
OpenLayers.Console.error("Trouble serializing: " + err);
}
}
return json;
},
/**
* Method: writeIndent
* Output an indentation string depending on the indentation level.
*
* Returns:
* {String} An appropriate indentation string.
*/
writeIndent: function() {
var pieces = [];
if(this.pretty) {
for(var i=0; i<this.level; ++i) {
pieces.push(this.indent);
}
}
return pieces.join('');
},
/**
* Method: writeNewline
* Output a string representing a newline if in pretty printing mode.
*
* Returns:
* {String} A string representing a new line.
*/
writeNewline: function() {
return (this.pretty) ? this.newline : '';
},
/**
* Method: writeSpace
* Output a string representing a space if in pretty printing mode.
*
* Returns:
* {String} A space.
*/
writeSpace: function() {
return (this.pretty) ? this.space : '';
},
/**
* Property: serialize
* Object with properties corresponding to the serializable data types.
* Property values are functions that do the actual serializing.
*/
serialize: {
/**
* Method: serialize.object
* Transform an object into a JSON string.
*
* Parameters:
* object - {Object} The object to be serialized.
*
* Returns:
* {String} A JSON string representing the object.
*/
'object': function(object) {
// three special objects that we want to treat differently
if(object == null) {
return "null";
}
if(object.constructor == Date) {
return this.serialize.date.apply(this, [object]);
}
if(object.constructor == Array) {
return this.serialize.array.apply(this, [object]);
}
var pieces = ['{'];
this.level += 1;
var key, keyJSON, valueJSON;
var addComma = false;
for(key in object) {
if(object.hasOwnProperty(key)) {
// recursive calls need to allow for sub-classing
keyJSON = OpenLayers.Format.JSON.prototype.write.apply(this,
[key, this.pretty]);
valueJSON = OpenLayers.Format.JSON.prototype.write.apply(this,
[object[key], this.pretty]);
if(keyJSON != null && valueJSON != null) {
if(addComma) {
pieces.push(',');
}
pieces.push(this.writeNewline(), this.writeIndent(),
keyJSON, ':', this.writeSpace(), valueJSON);
addComma = true;
}
}
}
this.level -= 1;
pieces.push(this.writeNewline(), this.writeIndent(), '}');
return pieces.join('');
},
/**
* Method: serialize.array
* Transform an array into a JSON string.
*
* Parameters:
* array - {Array} The array to be serialized
*
* Returns:
* {String} A JSON string representing the array.
*/
'array': function(array) {
var json;
var pieces = ['['];
this.level += 1;
for(var i=0, len=array.length; i<len; ++i) {
// recursive calls need to allow for sub-classing
json = OpenLayers.Format.JSON.prototype.write.apply(this,
[array[i], this.pretty]);
if(json != null) {
if(i > 0) {
pieces.push(',');
}
pieces.push(this.writeNewline(), this.writeIndent(), json);
}
}
this.level -= 1;
pieces.push(this.writeNewline(), this.writeIndent(), ']');
return pieces.join('');
},
/**
* Method: serialize.string
* Transform a string into a JSON string.
*
* Parameters:
* string - {String} The string to be serialized
*
* Returns:
* {String} A JSON string representing the string.
*/
'string': function(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can simply slap some quotes around it.
// Otherwise we must also replace the offending characters with safe
// sequences.
var m = {
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
};
if(/["\\\x00-\x1f]/.test(string)) {
return '"' + string.replace(/([\x00-\x1f\\"])/g, function(a, b) {
var c = m[b];
if(c) {
return c;
}
c = b.charCodeAt();
return '\\u00' +
Math.floor(c / 16).toString(16) +
(c % 16).toString(16);
}) + '"';
}
return '"' + string + '"';
},
/**
* Method: serialize.number
* Transform a number into a JSON string.
*
* Parameters:
* number - {Number} The number to be serialized.
*
* Returns:
* {String} A JSON string representing the number.
*/
'number': function(number) {
return isFinite(number) ? String(number) : "null";
},
/**
* Method: serialize.boolean
* Transform a boolean into a JSON string.
*
* Parameters:
* bool - {Boolean} The boolean to be serialized.
*
* Returns:
* {String} A JSON string representing the boolean.
*/
'boolean': function(bool) {
return String(bool);
},
/**
* Method: serialize.object
* Transform a date into a JSON string.
*
* Parameters:
* date - {Date} The date to be serialized.
*
* Returns:
* {String} A JSON string representing the date.
*/
'date': function(date) {
function format(number) {
// Format integers to have at least two digits.
return (number < 10) ? '0' + number : number;
}
return '"' + date.getFullYear() + '-' +
format(date.getMonth() + 1) + '-' +
format(date.getDate()) + 'T' +
format(date.getHours()) + ':' +
format(date.getMinutes()) + ':' +
format(date.getSeconds()) + '"';
}
},
CLASS_NAME: "OpenLayers.Format.JSON"
});
/* ======================================================================
OpenLayers/Format/GeoJSON.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Format/JSON.js
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Geometry/Point.js
* @requires OpenLayers/Geometry/MultiPoint.js
* @requires OpenLayers/Geometry/LineString.js
* @requires OpenLayers/Geometry/MultiLineString.js
* @requires OpenLayers/Geometry/Polygon.js
* @requires OpenLayers/Geometry/MultiPolygon.js
* @requires OpenLayers/Console.js
*/
/**
* Class: OpenLayers.Format.GeoJSON
* Read and write GeoJSON. Create a new parser with the
* <OpenLayers.Format.GeoJSON> constructor.
*
* Inherits from:
* - <OpenLayers.Format.JSON>
*/
OpenLayers.Format.GeoJSON = OpenLayers.Class(OpenLayers.Format.JSON, {
/**
* APIProperty: ignoreExtraDims
* {Boolean} Ignore dimensions higher than 2 when reading geometry
* coordinates.
*/
ignoreExtraDims: false,
/**
* Constructor: OpenLayers.Format.GeoJSON
* Create a new parser for GeoJSON.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
/**
* APIMethod: read
* Deserialize a GeoJSON string.
*
* Parameters:
* json - {String} A GeoJSON string
* type - {String} Optional string that determines the structure of
* the output. Supported values are "Geometry", "Feature", and
* "FeatureCollection". If absent or null, a default of
* "FeatureCollection" is assumed.
* filter - {Function} A function which will be called for every key and
* value at every level of the final result. Each value will be
* replaced by the result of the filter function. This can be used to
* reform generic objects into instances of classes, or to transform
* date strings into Date objects.
*
* Returns:
* {Object} The return depends on the value of the type argument. If type
* is "FeatureCollection" (the default), the return will be an array
* of <OpenLayers.Feature.Vector>. If type is "Geometry", the input json
* must represent a single geometry, and the return will be an
* <OpenLayers.Geometry>. If type is "Feature", the input json must
* represent a single feature, and the return will be an
* <OpenLayers.Feature.Vector>.
*/
read: function(json, type, filter) {
type = (type) ? type : "FeatureCollection";
var results = null;
var obj = null;
if (typeof json == "string") {
obj = OpenLayers.Format.JSON.prototype.read.apply(this,
[json, filter]);
} else {
obj = json;
}
if(!obj) {
OpenLayers.Console.error("Bad JSON: " + json);
} else if(typeof(obj.type) != "string") {
OpenLayers.Console.error("Bad GeoJSON - no type: " + json);
} else if(this.isValidType(obj, type)) {
switch(type) {
case "Geometry":
try {
results = this.parseGeometry(obj);
} catch(err) {
OpenLayers.Console.error(err);
}
break;
case "Feature":
try {
results = this.parseFeature(obj);
results.type = "Feature";
} catch(err) {
OpenLayers.Console.error(err);
}
break;
case "FeatureCollection":
// for type FeatureCollection, we allow input to be any type
results = [];
switch(obj.type) {
case "Feature":
try {
results.push(this.parseFeature(obj));
} catch(err) {
results = null;
OpenLayers.Console.error(err);
}
break;
case "FeatureCollection":
for(var i=0, len=obj.features.length; i<len; ++i) {
try {
results.push(this.parseFeature(obj.features[i]));
} catch(err) {
results = null;
OpenLayers.Console.error(err);
}
}
break;
default:
try {
var geom = this.parseGeometry(obj);
results.push(new OpenLayers.Feature.Vector(geom));
} catch(err) {
results = null;
OpenLayers.Console.error(err);
}
}
break;
}
}
return results;
},
/**
* Method: isValidType
* Check if a GeoJSON object is a valid representative of the given type.
*
* Returns:
* {Boolean} The object is valid GeoJSON object of the given type.
*/
isValidType: function(obj, type) {
var valid = false;
switch(type) {
case "Geometry":
if(OpenLayers.Util.indexOf(
["Point", "MultiPoint", "LineString", "MultiLineString",
"Polygon", "MultiPolygon", "Box", "GeometryCollection"],
obj.type) == -1) {
// unsupported geometry type
OpenLayers.Console.error("Unsupported geometry type: " +
obj.type);
} else {
valid = true;
}
break;
case "FeatureCollection":
// allow for any type to be converted to a feature collection
valid = true;
break;
default:
// for Feature types must match
if(obj.type == type) {
valid = true;
} else {
OpenLayers.Console.error("Cannot convert types from " +
obj.type + " to " + type);
}
}
return valid;
},
/**
* Method: parseFeature
* Convert a feature object from GeoJSON into an
* <OpenLayers.Feature.Vector>.
*
* Parameters:
* obj - {Object} An object created from a GeoJSON object
*
* Returns:
* {<OpenLayers.Feature.Vector>} A feature.
*/
parseFeature: function(obj) {
var feature, geometry, attributes, bbox;
attributes = (obj.properties) ? obj.properties : {};
bbox = (obj.geometry && obj.geometry.bbox) || obj.bbox;
try {
geometry = this.parseGeometry(obj.geometry);
} catch(err) {
// deal with bad geometries
throw err;
}
feature = new OpenLayers.Feature.Vector(geometry, attributes);
if(bbox) {
feature.bounds = OpenLayers.Bounds.fromArray(bbox);
}
if(obj.id) {
feature.fid = obj.id;
}
return feature;
},
/**
* Method: parseGeometry
* Convert a geometry object from GeoJSON into an <OpenLayers.Geometry>.
*
* Parameters:
* obj - {Object} An object created from a GeoJSON object
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
parseGeometry: function(obj) {
if (obj == null) {
return null;
}
var geometry, collection = false;
if(obj.type == "GeometryCollection") {
if(!(OpenLayers.Util.isArray(obj.geometries))) {
throw "GeometryCollection must have geometries array: " + obj;
}
var numGeom = obj.geometries.length;
var components = new Array(numGeom);
for(var i=0; i<numGeom; ++i) {
components[i] = this.parseGeometry.apply(
this, [obj.geometries[i]]
);
}
geometry = new OpenLayers.Geometry.Collection(components);
collection = true;
} else {
if(!(OpenLayers.Util.isArray(obj.coordinates))) {
throw "Geometry must have coordinates array: " + obj;
}
if(!this.parseCoords[obj.type.toLowerCase()]) {
throw "Unsupported geometry type: " + obj.type;
}
try {
geometry = this.parseCoords[obj.type.toLowerCase()].apply(
this, [obj.coordinates]
);
} catch(err) {
// deal with bad coordinates
throw err;
}
}
// We don't reproject collections because the children are reprojected
// for us when they are created.
if (this.internalProjection && this.externalProjection && !collection) {
geometry.transform(this.externalProjection,
this.internalProjection);
}
return geometry;
},
/**
* Property: parseCoords
* Object with properties corresponding to the GeoJSON geometry types.
* Property values are functions that do the actual parsing.
*/
parseCoords: {
/**
* Method: parseCoords.point
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"point": function(array) {
if (this.ignoreExtraDims == false &&
array.length != 2) {
throw "Only 2D points are supported: " + array;
}
return new OpenLayers.Geometry.Point(array[0], array[1]);
},
/**
* Method: parseCoords.multipoint
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"multipoint": function(array) {
var points = [];
var p = null;
for(var i=0, len=array.length; i<len; ++i) {
try {
p = this.parseCoords["point"].apply(this, [array[i]]);
} catch(err) {
throw err;
}
points.push(p);
}
return new OpenLayers.Geometry.MultiPoint(points);
},
/**
* Method: parseCoords.linestring
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"linestring": function(array) {
var points = [];
var p = null;
for(var i=0, len=array.length; i<len; ++i) {
try {
p = this.parseCoords["point"].apply(this, [array[i]]);
} catch(err) {
throw err;
}
points.push(p);
}
return new OpenLayers.Geometry.LineString(points);
},
/**
* Method: parseCoords.multilinestring
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"multilinestring": function(array) {
var lines = [];
var l = null;
for(var i=0, len=array.length; i<len; ++i) {
try {
l = this.parseCoords["linestring"].apply(this, [array[i]]);
} catch(err) {
throw err;
}
lines.push(l);
}
return new OpenLayers.Geometry.MultiLineString(lines);
},
/**
* Method: parseCoords.polygon
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"polygon": function(array) {
var rings = [];
var r, l;
for(var i=0, len=array.length; i<len; ++i) {
try {
l = this.parseCoords["linestring"].apply(this, [array[i]]);
} catch(err) {
throw err;
}
r = new OpenLayers.Geometry.LinearRing(l.components);
rings.push(r);
}
return new OpenLayers.Geometry.Polygon(rings);
},
/**
* Method: parseCoords.multipolygon
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"multipolygon": function(array) {
var polys = [];
var p = null;
for(var i=0, len=array.length; i<len; ++i) {
try {
p = this.parseCoords["polygon"].apply(this, [array[i]]);
} catch(err) {
throw err;
}
polys.push(p);
}
return new OpenLayers.Geometry.MultiPolygon(polys);
},
/**
* Method: parseCoords.box
* Convert a coordinate array from GeoJSON into an
* <OpenLayers.Geometry>.
*
* Parameters:
* array - {Object} The coordinates array from the GeoJSON fragment.
*
* Returns:
* {<OpenLayers.Geometry>} A geometry.
*/
"box": function(array) {
if(array.length != 2) {
throw "GeoJSON box coordinates must have 2 elements";
}
return new OpenLayers.Geometry.Polygon([
new OpenLayers.Geometry.LinearRing([
new OpenLayers.Geometry.Point(array[0][0], array[0][1]),
new OpenLayers.Geometry.Point(array[1][0], array[0][1]),
new OpenLayers.Geometry.Point(array[1][0], array[1][1]),
new OpenLayers.Geometry.Point(array[0][0], array[1][1]),
new OpenLayers.Geometry.Point(array[0][0], array[0][1])
])
]);
}
},
/**
* APIMethod: write
* Serialize a feature, geometry, array of features into a GeoJSON string.
*
* Parameters:
* obj - {Object} An <OpenLayers.Feature.Vector>, <OpenLayers.Geometry>,
* or an array of features.
* pretty - {Boolean} Structure the output with newlines and indentation.
* Default is false.
*
* Returns:
* {String} The GeoJSON string representation of the input geometry,
* features, or array of features.
*/
write: function(obj, pretty) {
var geojson = {
"type": null
};
if(OpenLayers.Util.isArray(obj)) {
geojson.type = "FeatureCollection";
var numFeatures = obj.length;
geojson.features = new Array(numFeatures);
for(var i=0; i<numFeatures; ++i) {
var element = obj[i];
if(!element instanceof OpenLayers.Feature.Vector) {
var msg = "FeatureCollection only supports collections " +
"of features: " + element;
throw msg;
}
geojson.features[i] = this.extract.feature.apply(
this, [element]
);
}
} else if (obj.CLASS_NAME.indexOf("OpenLayers.Geometry") == 0) {
geojson = this.extract.geometry.apply(this, [obj]);
} else if (obj instanceof OpenLayers.Feature.Vector) {
geojson = this.extract.feature.apply(this, [obj]);
if(obj.layer && obj.layer.projection) {
geojson.crs = this.createCRSObject(obj);
}
}
return OpenLayers.Format.JSON.prototype.write.apply(this,
[geojson, pretty]);
},
/**
* Method: createCRSObject
* Create the CRS object for an object.
*
* Parameters:
* object - {<OpenLayers.Feature.Vector>}
*
* Returns:
* {Object} An object which can be assigned to the crs property
* of a GeoJSON object.
*/
createCRSObject: function(object) {
var proj = object.layer.projection.toString();
var crs = {};
if (proj.match(/epsg:/i)) {
var code = parseInt(proj.substring(proj.indexOf(":") + 1));
if (code == 4326) {
crs = {
"type": "name",
"properties": {
"name": "urn:ogc:def:crs:OGC:1.3:CRS84"
}
};
} else {
crs = {
"type": "name",
"properties": {
"name": "EPSG:" + code
}
};
}
}
return crs;
},
/**
* Property: extract
* Object with properties corresponding to the GeoJSON types.
* Property values are functions that do the actual value extraction.
*/
extract: {
/**
* Method: extract.feature
* Return a partial GeoJSON object representing a single feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
*
* Returns:
* {Object} An object representing the point.
*/
'feature': function(feature) {
var geom = this.extract.geometry.apply(this, [feature.geometry]);
var json = {
"type": "Feature",
"properties": feature.attributes,
"geometry": geom
};
if (feature.fid != null) {
json.id = feature.fid;
}
return json;
},
/**
* Method: extract.geometry
* Return a GeoJSON object representing a single geometry.
*
* Parameters:
* geometry - {<OpenLayers.Geometry>}
*
* Returns:
* {Object} An object representing the geometry.
*/
'geometry': function(geometry) {
if (geometry == null) {
return null;
}
if (this.internalProjection && this.externalProjection) {
geometry = geometry.clone();
geometry.transform(this.internalProjection,
this.externalProjection);
}
var geometryType = geometry.CLASS_NAME.split('.')[2];
var data = this.extract[geometryType.toLowerCase()].apply(this, [geometry]);
var json;
if(geometryType == "Collection") {
json = {
"type": "GeometryCollection",
"geometries": data
};
} else {
json = {
"type": geometryType,
"coordinates": data
};
}
return json;
},
/**
* Method: extract.point
* Return an array of coordinates from a point.
*
* Parameters:
* point - {<OpenLayers.Geometry.Point>}
*
* Returns:
* {Array} An array of coordinates representing the point.
*/
'point': function(point) {
return [point.x, point.y];
},
/**
* Method: extract.multipoint
* Return an array of point coordinates from a multipoint.
*
* Parameters:
* multipoint - {<OpenLayers.Geometry.MultiPoint>}
*
* Returns:
* {Array} An array of point coordinate arrays representing
* the multipoint.
*/
'multipoint': function(multipoint) {
var array = [];
for(var i=0, len=multipoint.components.length; i<len; ++i) {
array.push(this.extract.point.apply(this, [multipoint.components[i]]));
}
return array;
},
/**
* Method: extract.linestring
* Return an array of coordinate arrays from a linestring.
*
* Parameters:
* linestring - {<OpenLayers.Geometry.LineString>}
*
* Returns:
* {Array} An array of coordinate arrays representing
* the linestring.
*/
'linestring': function(linestring) {
var array = [];
for(var i=0, len=linestring.components.length; i<len; ++i) {
array.push(this.extract.point.apply(this, [linestring.components[i]]));
}
return array;
},
/**
* Method: extract.multilinestring
* Return an array of linestring arrays from a linestring.
*
* Parameters:
* multilinestring - {<OpenLayers.Geometry.MultiLineString>}
*
* Returns:
* {Array} An array of linestring arrays representing
* the multilinestring.
*/
'multilinestring': function(multilinestring) {
var array = [];
for(var i=0, len=multilinestring.components.length; i<len; ++i) {
array.push(this.extract.linestring.apply(this, [multilinestring.components[i]]));
}
return array;
},
/**
* Method: extract.polygon
* Return an array of linear ring arrays from a polygon.
*
* Parameters:
* polygon - {<OpenLayers.Geometry.Polygon>}
*
* Returns:
* {Array} An array of linear ring arrays representing the polygon.
*/
'polygon': function(polygon) {
var array = [];
for(var i=0, len=polygon.components.length; i<len; ++i) {
array.push(this.extract.linestring.apply(this, [polygon.components[i]]));
}
return array;
},
/**
* Method: extract.multipolygon
* Return an array of polygon arrays from a multipolygon.
*
* Parameters:
* multipolygon - {<OpenLayers.Geometry.MultiPolygon>}
*
* Returns:
* {Array} An array of polygon arrays representing
* the multipolygon
*/
'multipolygon': function(multipolygon) {
var array = [];
for(var i=0, len=multipolygon.components.length; i<len; ++i) {
array.push(this.extract.polygon.apply(this, [multipolygon.components[i]]));
}
return array;
},
/**
* Method: extract.collection
* Return an array of geometries from a geometry collection.
*
* Parameters:
* collection - {<OpenLayers.Geometry.Collection>}
*
* Returns:
* {Array} An array of geometry objects representing the geometry
* collection.
*/
'collection': function(collection) {
var len = collection.components.length;
var array = new Array(len);
for(var i=0; i<len; ++i) {
array[i] = this.extract.geometry.apply(
this, [collection.components[i]]
);
}
return array;
}
},
CLASS_NAME: "OpenLayers.Format.GeoJSON"
});
/* ======================================================================
OpenLayers/Control/DrawFeature.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Feature/Vector.js
*/
/**
* Class: OpenLayers.Control.DrawFeature
* The DrawFeature control draws point, line or polygon features on a vector
* layer when active.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.DrawFeature = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: layer
* {<OpenLayers.Layer.Vector>}
*/
layer: null,
/**
* Property: callbacks
* {Object} The functions that are sent to the handler for callback
*/
callbacks: null,
/**
* APIProperty: events
* {<OpenLayers.Events>} Events instance for listeners and triggering
* control specific events.
*
* Register a listener for a particular event with the following syntax:
* (code)
* control.events.register(type, obj, listener);
* (end)
*
* Supported event types (in addition to those from <OpenLayers.Control.events>):
* featureadded - Triggered when a feature is added
*/
/**
* APIProperty: multi
* {Boolean} Cast features to multi-part geometries before passing to the
* layer. Default is false.
*/
multi: false,
/**
* APIProperty: featureAdded
* {Function} Called after each feature is added
*/
featureAdded: function() {},
/**
* APIProperty: handlerOptions
* {Object} Used to set non-default properties on the control's handler
*/
/**
* Constructor: OpenLayers.Control.DrawFeature
*
* Parameters:
* layer - {<OpenLayers.Layer.Vector>}
* handler - {<OpenLayers.Handler>}
* options - {Object}
*/
initialize: function(layer, handler, options) {
OpenLayers.Control.prototype.initialize.apply(this, [options]);
this.callbacks = OpenLayers.Util.extend(
{
done: this.drawFeature,
modify: function(vertex, feature) {
this.layer.events.triggerEvent(
"sketchmodified", {vertex: vertex, feature: feature}
);
},
create: function(vertex, feature) {
this.layer.events.triggerEvent(
"sketchstarted", {vertex: vertex, feature: feature}
);
}
},
this.callbacks
);
this.layer = layer;
this.handlerOptions = this.handlerOptions || {};
this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
this.handlerOptions.layerOptions, {
renderers: layer.renderers, rendererOptions: layer.rendererOptions
}
);
if (!("multi" in this.handlerOptions)) {
this.handlerOptions.multi = this.multi;
}
var sketchStyle = this.layer.styleMap && this.layer.styleMap.styles.temporary;
if(sketchStyle) {
this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
this.handlerOptions.layerOptions,
{styleMap: new OpenLayers.StyleMap({"default": sketchStyle})}
);
}
this.handler = new handler(this, this.callbacks, this.handlerOptions);
},
/**
* Method: drawFeature
*/
drawFeature: function(geometry) {
var feature = new OpenLayers.Feature.Vector(geometry);
var proceed = this.layer.events.triggerEvent(
"sketchcomplete", {feature: feature}
);
if(proceed !== false) {
feature.state = OpenLayers.State.INSERT;
this.layer.addFeatures([feature]);
this.featureAdded(feature);
this.events.triggerEvent("featureadded",{feature : feature});
}
},
/**
* APIMethod: insertXY
* Insert a point in the current sketch given x & y coordinates.
*
* Parameters:
* x - {Number} The x-coordinate of the point.
* y - {Number} The y-coordinate of the point.
*/
insertXY: function(x, y) {
if (this.handler && this.handler.line) {
this.handler.insertXY(x, y);
}
},
/**
* APIMethod: insertDeltaXY
* Insert a point given offsets from the previously inserted point.
*
* Parameters:
* dx - {Number} The x-coordinate offset of the point.
* dy - {Number} The y-coordinate offset of the point.
*/
insertDeltaXY: function(dx, dy) {
if (this.handler && this.handler.line) {
this.handler.insertDeltaXY(dx, dy);
}
},
/**
* APIMethod: insertDirectionLength
* Insert a point in the current sketch given a direction and a length.
*
* Parameters:
* direction - {Number} Degrees clockwise from the positive x-axis.
* length - {Number} Distance from the previously drawn point.
*/
insertDirectionLength: function(direction, length) {
if (this.handler && this.handler.line) {
this.handler.insertDirectionLength(direction, length);
}
},
/**
* APIMethod: insertDeflectionLength
* Insert a point in the current sketch given a deflection and a length.
* The deflection should be degrees clockwise from the previously
* digitized segment.
*
* Parameters:
* deflection - {Number} Degrees clockwise from the previous segment.
* length - {Number} Distance from the previously drawn point.
*/
insertDeflectionLength: function(deflection, length) {
if (this.handler && this.handler.line) {
this.handler.insertDeflectionLength(deflection, length);
}
},
/**
* APIMethod: undo
* Remove the most recently added point in the current sketch geometry.
*
* Returns:
* {Boolean} An edit was undone.
*/
undo: function() {
return this.handler.undo && this.handler.undo();
},
/**
* APIMethod: redo
* Reinsert the most recently removed point resulting from an <undo> call.
* The undo stack is deleted whenever a point is added by other means.
*
* Returns:
* {Boolean} An edit was redone.
*/
redo: function() {
return this.handler.redo && this.handler.redo();
},
/**
* APIMethod: finishSketch
* Finishes the sketch without including the currently drawn point.
* This method can be called to terminate drawing programmatically
* instead of waiting for the user to end the sketch.
*/
finishSketch: function() {
this.handler.finishGeometry();
},
/**
* APIMethod: cancel
* Cancel the current sketch. This removes the current sketch and keeps
* the drawing control active.
*/
cancel: function() {
this.handler.cancel();
},
CLASS_NAME: "OpenLayers.Control.DrawFeature"
});
/* ======================================================================
OpenLayers/Handler/Pinch.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
*/
/**
* Class: OpenLayers.Handler.Pinch
* The pinch handler is used to deal with sequences of browser events related
* to pinch gestures. The handler is used by controls that want to know
* when a pinch sequence begins, when a pinch is happening, and when it has
* finished.
*
* Controls that use the pinch handler typically construct it with callbacks
* for 'start', 'move', and 'done'. Callbacks for these keys are
* called when the pinch begins, with each change, and when the pinch is
* done.
*
* Create a new pinch handler with the <OpenLayers.Handler.Pinch> constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Pinch = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: started
* {Boolean} When a touchstart event is received, we want to record it,
* but not set 'pinching' until the touchmove get started after
* starting.
*/
started: false,
/**
* Property: stopDown
* {Boolean} Stop propagation of touchstart events from getting to
* listeners on the same element. Default is false.
*/
stopDown: false,
/**
* Property: pinching
* {Boolean}
*/
pinching: false,
/**
* Property: last
* {Object} Object that store informations related to pinch last touch.
*/
last: null,
/**
* Property: start
* {Object} Object that store informations related to pinch touchstart.
*/
start: null,
/**
* Constructor: OpenLayers.Handler.Pinch
* Returns OpenLayers.Handler.Pinch
*
* Parameters:
* control - {<OpenLayers.Control>} The control that is making use of
* this handler. If a handler is being used without a control, the
* handlers setMap method must be overridden to deal properly with
* the map.
* callbacks - {Object} An object containing functions to be called when
* the pinch operation start, change, or is finished. The callbacks
* should expect to receive an object argument, which contains
* information about scale, distance, and position of touch points.
* options - {Object}
*/
/**
* Method: touchstart
* Handle touchstart events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchstart: function(evt) {
var propagate = true;
this.pinching = false;
if (OpenLayers.Event.isMultiTouch(evt)) {
this.started = true;
this.last = this.start = {
distance: this.getDistance(evt.touches),
delta: 0,
scale: 1
};
this.callback("start", [evt, this.start]);
propagate = !this.stopDown;
} else if (this.started) {
// Some webkit versions send fake single-touch events during
// multitouch, which cause the drag handler to trigger
return false;
} else {
this.started = false;
this.start = null;
this.last = null;
}
// prevent document dragging
OpenLayers.Event.preventDefault(evt);
return propagate;
},
/**
* Method: touchmove
* Handle touchmove events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchmove: function(evt) {
if (this.started && OpenLayers.Event.isMultiTouch(evt)) {
this.pinching = true;
var current = this.getPinchData(evt);
this.callback("move", [evt, current]);
this.last = current;
// prevent document dragging
OpenLayers.Event.stop(evt);
} else if (this.started) {
// Some webkit versions send fake single-touch events during
// multitouch, which cause the drag handler to trigger
return false;
}
return true;
},
/**
* Method: touchend
* Handle touchend events
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} Let the event propagate.
*/
touchend: function(evt) {
if (this.started && !OpenLayers.Event.isMultiTouch(evt)) {
this.started = false;
this.pinching = false;
this.callback("done", [evt, this.start, this.last]);
this.start = null;
this.last = null;
return false;
}
return true;
},
/**
* Method: activate
* Activate the handler.
*
* Returns:
* {Boolean} The handler was successfully activated.
*/
activate: function() {
var activated = false;
if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.pinching = false;
activated = true;
}
return activated;
},
/**
* Method: deactivate
* Deactivate the handler.
*
* Returns:
* {Boolean} The handler was successfully deactivated.
*/
deactivate: function() {
var deactivated = false;
if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
this.started = false;
this.pinching = false;
this.start = null;
this.last = null;
deactivated = true;
}
return deactivated;
},
/**
* Method: getDistance
* Get the distance in pixels between two touches.
*
* Parameters:
* touches - {Array(Object)}
*
* Returns:
* {Number} The distance in pixels.
*/
getDistance: function(touches) {
var t0 = touches[0];
var t1 = touches[1];
return Math.sqrt(
Math.pow(t0.olClientX - t1.olClientX, 2) +
Math.pow(t0.olClientY - t1.olClientY, 2)
);
},
/**
* Method: getPinchData
* Get informations about the pinch event.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Object} Object that contains data about the current pinch.
*/
getPinchData: function(evt) {
var distance = this.getDistance(evt.touches);
var scale = distance / this.start.distance;
return {
distance: distance,
delta: this.last.distance - distance,
scale: scale
};
},
CLASS_NAME: "OpenLayers.Handler.Pinch"
});
/* ======================================================================
OpenLayers/Handler/Polygon.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler/Path.js
* @requires OpenLayers/Geometry/Polygon.js
*/
/**
* Class: OpenLayers.Handler.Polygon
* Handler to draw a polygon on the map. Polygon is displayed on mouse down,
* moves on mouse move, and is finished on mouse up.
*
* Inherits from:
* - <OpenLayers.Handler.Path>
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
/**
* APIProperty: holeModifier
* {String} Key modifier to trigger hole digitizing. Acceptable values are
* "altKey", "shiftKey", or "ctrlKey". If not set, no hole digitizing
* will take place. Default is null.
*/
holeModifier: null,
/**
* Property: drawingHole
* {Boolean} Currently drawing an interior ring.
*/
drawingHole: false,
/**
* Property: polygon
* {<OpenLayers.Feature.Vector>}
*/
polygon: null,
/**
* Constructor: OpenLayers.Handler.Polygon
* Create a Polygon Handler.
*
* Parameters:
* control - {<OpenLayers.Control>} The control that owns this handler
* callbacks - {Object} An object with a properties whose values are
* functions. Various callbacks described below.
* options - {Object} An optional object with properties to be set on the
* handler
*
* Named callbacks:
* create - Called when a sketch is first created. Callback called with
* the creation point geometry and sketch feature.
* modify - Called with each move of a vertex with the vertex (point)
* geometry and the sketch feature.
* point - Called as each point is added. Receives the new point geometry.
* done - Called when the point drawing is finished. The callback will
* recieve a single argument, the polygon geometry.
* cancel - Called when the handler is deactivated while drawing. The
* cancel callback will receive a geometry.
*/
/**
* Method: createFeature
* Add temporary geometries
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The initial pixel location for the new
* feature.
*/
createFeature: function(pixel) {
var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
var geometry = new OpenLayers.Geometry.Point(
lonlat.lon, lonlat.lat
);
this.point = new OpenLayers.Feature.Vector(geometry);
this.line = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LinearRing([this.point.geometry])
);
this.polygon = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon([this.line.geometry])
);
this.callback("create", [this.point.geometry, this.getSketch()]);
this.point.geometry.clearBounds();
this.layer.addFeatures([this.polygon, this.point], {silent: true});
},
/**
* Method: addPoint
* Add point to geometry.
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The pixel location for the new point.
*/
addPoint: function(pixel) {
if(!this.drawingHole && this.holeModifier &&
this.evt && this.evt[this.holeModifier]) {
var geometry = this.point.geometry;
var features = this.control.layer.features;
var candidate, polygon;
// look for intersections, last drawn gets priority
for (var i=features.length-1; i>=0; --i) {
candidate = features[i].geometry;
if ((candidate instanceof OpenLayers.Geometry.Polygon ||
candidate instanceof OpenLayers.Geometry.MultiPolygon) &&
candidate.intersects(geometry)) {
polygon = features[i];
this.control.layer.removeFeatures([polygon], {silent: true});
this.control.layer.events.registerPriority(
"sketchcomplete", this, this.finalizeInteriorRing
);
this.control.layer.events.registerPriority(
"sketchmodified", this, this.enforceTopology
);
polygon.geometry.addComponent(this.line.geometry);
this.polygon = polygon;
this.drawingHole = true;
break;
}
}
}
OpenLayers.Handler.Path.prototype.addPoint.apply(this, arguments);
},
/**
* Method: getCurrentPointIndex
*
* Returns:
* {Number} The index of the most recently drawn point.
*/
getCurrentPointIndex: function() {
return this.line.geometry.components.length - 2;
},
/**
* Method: enforceTopology
* Simple topology enforcement for drawing interior rings. Ensures vertices
* of interior rings are contained by exterior ring. Other topology
* rules are enforced in <finalizeInteriorRing> to allow drawing of
* rings that intersect only during the sketch (e.g. a "C" shaped ring
* that nearly encloses another ring).
*/
enforceTopology: function(event) {
var point = event.vertex;
var components = this.line.geometry.components;
// ensure that vertices of interior ring are contained by exterior ring
if (!this.polygon.geometry.intersects(point)) {
var last = components[components.length-3];
point.x = last.x;
point.y = last.y;
}
},
/**
* Method: finishGeometry
* Finish the geometry and send it back to the control.
*/
finishGeometry: function() {
var index = this.line.geometry.components.length - 2;
this.line.geometry.removeComponent(this.line.geometry.components[index]);
this.removePoint();
this.finalize();
},
/**
* Method: finalizeInteriorRing
* Enforces that new ring has some area and doesn't contain vertices of any
* other rings.
*/
finalizeInteriorRing: function() {
var ring = this.line.geometry;
// ensure that ring has some area
var modified = (ring.getArea() !== 0);
if (modified) {
// ensure that new ring doesn't intersect any other rings
var rings = this.polygon.geometry.components;
for (var i=rings.length-2; i>=0; --i) {
if (ring.intersects(rings[i])) {
modified = false;
break;
}
}
if (modified) {
// ensure that new ring doesn't contain any other rings
var target;
outer: for (var i=rings.length-2; i>0; --i) {
var points = rings[i].components;
for (var j=0, jj=points.length; j<jj; ++j) {
if (ring.containsPoint(points[j])) {
modified = false;
break outer;
}
}
}
}
}
if (modified) {
if (this.polygon.state !== OpenLayers.State.INSERT) {
this.polygon.state = OpenLayers.State.UPDATE;
}
} else {
this.polygon.geometry.removeComponent(ring);
}
this.restoreFeature();
return false;
},
/**
* APIMethod: cancel
* Finish the geometry and call the "cancel" callback.
*/
cancel: function() {
if (this.drawingHole) {
this.polygon.geometry.removeComponent(this.line.geometry);
this.restoreFeature(true);
}
return OpenLayers.Handler.Path.prototype.cancel.apply(this, arguments);
},
/**
* Method: restoreFeature
* Move the feature from the sketch layer to the target layer.
*
* Properties:
* cancel - {Boolean} Cancel drawing. If falsey, the "sketchcomplete" event
* will be fired.
*/
restoreFeature: function(cancel) {
this.control.layer.events.unregister(
"sketchcomplete", this, this.finalizeInteriorRing
);
this.control.layer.events.unregister(
"sketchmodified", this, this.enforceTopology
);
this.layer.removeFeatures([this.polygon], {silent: true});
this.control.layer.addFeatures([this.polygon], {silent: true});
this.drawingHole = false;
if (!cancel) {
// Re-trigger "sketchcomplete" so other listeners can do their
// business. While this is somewhat sloppy (if a listener is
// registered with registerPriority - not common - between the start
// and end of a single ring drawing - very uncommon - it will be
// called twice).
// TODO: In 3.0, collapse sketch handlers into geometry specific
// drawing controls.
this.control.layer.events.triggerEvent(
"sketchcomplete", {feature : this.polygon}
);
}
},
/**
* Method: destroyFeature
* Destroy temporary geometries
*
* Parameters:
* force - {Boolean} Destroy even if persist is true.
*/
destroyFeature: function(force) {
OpenLayers.Handler.Path.prototype.destroyFeature.call(
this, force);
this.polygon = null;
},
/**
* Method: drawFeature
* Render geometries on the temporary layer.
*/
drawFeature: function() {
this.layer.drawFeature(this.polygon, this.style);
this.layer.drawFeature(this.point, this.style);
},
/**
* Method: getSketch
* Return the sketch feature.
*
* Returns:
* {<OpenLayers.Feature.Vector>}
*/
getSketch: function() {
return this.polygon;
},
/**
* Method: getGeometry
* Return the sketch geometry. If <multi> is true, this will return
* a multi-part geometry.
*
* Returns:
* {<OpenLayers.Geometry.Polygon>}
*/
getGeometry: function() {
var geometry = this.polygon && this.polygon.geometry;
if(geometry && this.multi) {
geometry = new OpenLayers.Geometry.MultiPolygon([geometry]);
}
return geometry;
},
CLASS_NAME: "OpenLayers.Handler.Polygon"
});
/* ======================================================================
OpenLayers/Control/Geolocate.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Geometry/Point.js
* @requires OpenLayers/Projection.js
*/
/**
* Class: OpenLayers.Control.Geolocate
* The Geolocate control wraps w3c geolocation API into control that can be
* bound to a map, and generate events on location update
*
* To use this control requires to load the proj4js library if the projection
* of the map is not EPSG:4326 or EPSG:900913.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.Geolocate = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: events
* {<OpenLayers.Events>} Events instance for listeners and triggering
* control specific events.
*
* Register a listener for a particular event with the following syntax:
* (code)
* control.events.register(type, obj, listener);
* (end)
*
* Supported event types (in addition to those from <OpenLayers.Control.events>):
* locationupdated - Triggered when browser return a new position. Listeners will
* receive an object with a 'position' property which is the browser.geolocation.position
* native object, as well as a 'point' property which is the location transformed in the
* current map projection.
* locationfailed - Triggered when geolocation has failed
* locationuncapable - Triggered when control is activated on a browser
* which doesn't support geolocation
*/
/**
* Property: geolocation
* {Object} The geolocation engine, as a property to be possibly mocked.
* This is set lazily to avoid a memory leak in IE9.
*/
geolocation: null,
/**
* Property: available
* {Boolean} The navigator.geolocation object is available.
*/
available: ('geolocation' in navigator),
/**
* APIProperty: bind
* {Boolean} If true, map center will be set on location update.
*/
bind: true,
/**
* APIProperty: watch
* {Boolean} If true, position will be update regularly.
*/
watch: false,
/**
* APIProperty: geolocationOptions
* {Object} Options to pass to the navigator's geolocation API. See
* <http://dev.w3.org/geo/api/spec-source.html>. No specific
* option is passed to the geolocation API by default.
*/
geolocationOptions: null,
/**
* Constructor: OpenLayers.Control.Geolocate
* Create a new control to deal with browser geolocation API
*
*/
/**
* Method: destroy
*/
destroy: function() {
this.deactivate();
OpenLayers.Control.prototype.destroy.apply(this, arguments);
},
/**
* Method: activate
* Activates the control.
*
* Returns:
* {Boolean} The control was effectively activated.
*/
activate: function () {
if (this.available && !this.geolocation) {
// set lazily to avoid IE9 memory leak
this.geolocation = navigator.geolocation;
}
if (!this.geolocation) {
this.events.triggerEvent("locationuncapable");
return false;
}
if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
if (this.watch) {
this.watchId = this.geolocation.watchPosition(
OpenLayers.Function.bind(this.geolocate, this),
OpenLayers.Function.bind(this.failure, this),
this.geolocationOptions
);
} else {
this.getCurrentLocation();
}
return true;
}
return false;
},
/**
* Method: deactivate
* Deactivates the control.
*
* Returns:
* {Boolean} The control was effectively deactivated.
*/
deactivate: function () {
if (this.active && this.watchId !== null) {
this.geolocation.clearWatch(this.watchId);
}
return OpenLayers.Control.prototype.deactivate.apply(
this, arguments
);
},
/**
* Method: geolocate
* Activates the control.
*
*/
geolocate: function (position) {
var center = new OpenLayers.LonLat(
position.coords.longitude,
position.coords.latitude
).transform(
new OpenLayers.Projection("EPSG:4326"),
this.map.getProjectionObject()
);
if (this.bind) {
this.map.setCenter(center);
}
this.events.triggerEvent("locationupdated", {
position: position,
point: new OpenLayers.Geometry.Point(
center.lon, center.lat
)
});
},
/**
* APIMethod: getCurrentLocation
*
* Returns:
* {Boolean} Returns true if a event will be fired (successfull
* registration)
*/
getCurrentLocation: function() {
if (!this.active || this.watch) {
return false;
}
this.geolocation.getCurrentPosition(
OpenLayers.Function.bind(this.geolocate, this),
OpenLayers.Function.bind(this.failure, this),
this.geolocationOptions
);
return true;
},
/**
* Method: failure
* method called on browser's geolocation failure
*
*/
failure: function (error) {
this.events.triggerEvent("locationfailed", {error: error});
},
CLASS_NAME: "OpenLayers.Control.Geolocate"
});
/* ======================================================================
OpenLayers/Protocol/HTTP.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Protocol.js
* @requires OpenLayers/Request/XMLHttpRequest.js
*/
/**
* if application uses the query string, for example, for BBOX parameters,
* OpenLayers/Format/QueryStringFilter.js should be included in the build config file
*/
/**
* Class: OpenLayers.Protocol.HTTP
* A basic HTTP protocol for vector layers. Create a new instance with the
* <OpenLayers.Protocol.HTTP> constructor.
*
* Inherits from:
* - <OpenLayers.Protocol>
*/
OpenLayers.Protocol.HTTP = OpenLayers.Class(OpenLayers.Protocol, {
/**
* Property: url
* {String} Service URL, read-only, set through the options
* passed to constructor.
*/
url: null,
/**
* Property: headers
* {Object} HTTP request headers, read-only, set through the options
* passed to the constructor,
* Example: {'Content-Type': 'plain/text'}
*/
headers: null,
/**
* Property: params
* {Object} Parameters of GET requests, read-only, set through the options
* passed to the constructor,
* Example: {'bbox': '5,5,5,5'}
*/
params: null,
/**
* Property: callback
* {Object} Function to be called when the <read>, <create>,
* <update>, <delete> or <commit> operation completes, read-only,
* set through the options passed to the constructor.
*/
callback: null,
/**
* Property: scope
* {Object} Callback execution scope, read-only, set through the
* options passed to the constructor.
*/
scope: null,
/**
* APIProperty: readWithPOST
* {Boolean} true if read operations are done with POST requests
* instead of GET, defaults to false.
*/
readWithPOST: false,
/**
* APIProperty: updateWithPOST
* {Boolean} true if update operations are done with POST requests
* defaults to false.
*/
updateWithPOST: false,
/**
* APIProperty: deleteWithPOST
* {Boolean} true if delete operations are done with POST requests
* defaults to false.
* if true, POST data is set to output of format.write().
*/
deleteWithPOST: false,
/**
* Property: wildcarded.
* {Boolean} If true percent signs are added around values
* read from LIKE filters, for example if the protocol
* read method is passed a LIKE filter whose property
* is "foo" and whose value is "bar" the string
* "foo__ilike=%bar%" will be sent in the query string;
* defaults to false.
*/
wildcarded: false,
/**
* APIProperty: srsInBBOX
* {Boolean} Include the SRS identifier in BBOX query string parameter.
* Default is false. If true and the layer has a projection object set,
* any BBOX filter will be serialized with a fifth item identifying the
* projection. E.g. bbox=-1000,-1000,1000,1000,EPSG:900913
*/
srsInBBOX: false,
/**
* Constructor: OpenLayers.Protocol.HTTP
* A class for giving layers generic HTTP protocol.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Valid options include:
* url - {String}
* headers - {Object}
* params - {Object} URL parameters for GET requests
* format - {<OpenLayers.Format>}
* callback - {Function}
* scope - {Object}
*/
initialize: function(options) {
options = options || {};
this.params = {};
this.headers = {};
OpenLayers.Protocol.prototype.initialize.apply(this, arguments);
if (!this.filterToParams && OpenLayers.Format.QueryStringFilter) {
var format = new OpenLayers.Format.QueryStringFilter({
wildcarded: this.wildcarded,
srsInBBOX: this.srsInBBOX
});
this.filterToParams = function(filter, params) {
return format.write(filter, params);
};
}
},
/**
* APIMethod: destroy
* Clean up the protocol.
*/
destroy: function() {
this.params = null;
this.headers = null;
OpenLayers.Protocol.prototype.destroy.apply(this);
},
/**
* APIMethod: filterToParams
* Optional method to translate an <OpenLayers.Filter> object into an object
* that can be serialized as request query string provided. If a custom
* method is not provided, the filter will be serialized using the
* <OpenLayers.Format.QueryStringFilter> class.
*
* Parameters:
* filter - {<OpenLayers.Filter>} filter to convert.
* params - {Object} The parameters object.
*
* Returns:
* {Object} The resulting parameters object.
*/
/**
* APIMethod: read
* Construct a request for reading new features.
*
* Parameters:
* options - {Object} Optional object for configuring the request.
* This object is modified and should not be reused.
*
* Valid options:
* url - {String} Url for the request.
* params - {Object} Parameters to get serialized as a query string.
* headers - {Object} Headers to be set on the request.
* filter - {<OpenLayers.Filter>} Filter to get serialized as a
* query string.
* readWithPOST - {Boolean} If the request should be done with POST.
*
* Returns:
* {<OpenLayers.Protocol.Response>} A response object, whose "priv" property
* references the HTTP request, this object is also passed to the
* callback function when the request completes, its "features" property
* is then populated with the features received from the server.
*/
read: function(options) {
OpenLayers.Protocol.prototype.read.apply(this, arguments);
options = options || {};
options.params = OpenLayers.Util.applyDefaults(
options.params, this.options.params);
options = OpenLayers.Util.applyDefaults(options, this.options);
if (options.filter && this.filterToParams) {
options.params = this.filterToParams(
options.filter, options.params
);
}
var readWithPOST = (options.readWithPOST !== undefined) ?
options.readWithPOST : this.readWithPOST;
var resp = new OpenLayers.Protocol.Response({requestType: "read"});
if(readWithPOST) {
var headers = options.headers || {};
headers["Content-Type"] = "application/x-www-form-urlencoded";
resp.priv = OpenLayers.Request.POST({
url: options.url,
callback: this.createCallback(this.handleRead, resp, options),
data: OpenLayers.Util.getParameterString(options.params),
headers: headers
});
} else {
resp.priv = OpenLayers.Request.GET({
url: options.url,
callback: this.createCallback(this.handleRead, resp, options),
params: options.params,
headers: options.headers
});
}
return resp;
},
/**
* Method: handleRead
* Individual callbacks are created for read, create and update, should
* a subclass need to override each one separately.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object to pass to
* the user callback.
* options - {Object} The user options passed to the read call.
*/
handleRead: function(resp, options) {
this.handleResponse(resp, options);
},
/**
* APIMethod: create
* Construct a request for writing newly created features.
*
* Parameters:
* features - {Array({<OpenLayers.Feature.Vector>})} or
* {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
* This object is modified and should not be reused.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, whose "priv" property references the HTTP request, this
* object is also passed to the callback function when the request
* completes, its "features" property is then populated with the
* the features received from the server.
*/
create: function(features, options) {
options = OpenLayers.Util.applyDefaults(options, this.options);
var resp = new OpenLayers.Protocol.Response({
reqFeatures: features,
requestType: "create"
});
resp.priv = OpenLayers.Request.POST({
url: options.url,
callback: this.createCallback(this.handleCreate, resp, options),
headers: options.headers,
data: this.format.write(features)
});
return resp;
},
/**
* Method: handleCreate
* Called the the request issued by <create> is complete. May be overridden
* by subclasses.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object to pass to
* any user callback.
* options - {Object} The user options passed to the create call.
*/
handleCreate: function(resp, options) {
this.handleResponse(resp, options);
},
/**
* APIMethod: update
* Construct a request updating modified feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
* This object is modified and should not be reused.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, whose "priv" property references the HTTP request, this
* object is also passed to the callback function when the request
* completes, its "features" property is then populated with the
* the feature received from the server.
*/
update: function(feature, options) {
options = options || {};
var url = options.url ||
feature.url ||
this.options.url + "/" + feature.fid;
options = OpenLayers.Util.applyDefaults(options, this.options);
var resp = new OpenLayers.Protocol.Response({
reqFeatures: feature,
requestType: "update"
});
var method = this.updateWithPOST ? "POST" : "PUT";
resp.priv = OpenLayers.Request[method]({
url: url,
callback: this.createCallback(this.handleUpdate, resp, options),
headers: options.headers,
data: this.format.write(feature)
});
return resp;
},
/**
* Method: handleUpdate
* Called the the request issued by <update> is complete. May be overridden
* by subclasses.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object to pass to
* any user callback.
* options - {Object} The user options passed to the update call.
*/
handleUpdate: function(resp, options) {
this.handleResponse(resp, options);
},
/**
* APIMethod: delete
* Construct a request deleting a removed feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* options - {Object} Optional object for configuring the request.
* This object is modified and should not be reused.
*
* Returns:
* {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
* object, whose "priv" property references the HTTP request, this
* object is also passed to the callback function when the request
* completes.
*/
"delete": function(feature, options) {
options = options || {};
var url = options.url ||
feature.url ||
this.options.url + "/" + feature.fid;
options = OpenLayers.Util.applyDefaults(options, this.options);
var resp = new OpenLayers.Protocol.Response({
reqFeatures: feature,
requestType: "delete"
});
var method = this.deleteWithPOST ? "POST" : "DELETE";
var requestOptions = {
url: url,
callback: this.createCallback(this.handleDelete, resp, options),
headers: options.headers
};
if (this.deleteWithPOST) {
requestOptions.data = this.format.write(feature);
}
resp.priv = OpenLayers.Request[method](requestOptions);
return resp;
},
/**
* Method: handleDelete
* Called the the request issued by <delete> is complete. May be overridden
* by subclasses.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object to pass to
* any user callback.
* options - {Object} The user options passed to the delete call.
*/
handleDelete: function(resp, options) {
this.handleResponse(resp, options);
},
/**
* Method: handleResponse
* Called by CRUD specific handlers.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>} The response object to pass to
* any user callback.
* options - {Object} The user options passed to the create, read, update,
* or delete call.
*/
handleResponse: function(resp, options) {
var request = resp.priv;
if(options.callback) {
if(request.status >= 200 && request.status < 300) {
// success
if(resp.requestType != "delete") {
resp.features = this.parseFeatures(request);
}
resp.code = OpenLayers.Protocol.Response.SUCCESS;
} else {
// failure
resp.code = OpenLayers.Protocol.Response.FAILURE;
}
options.callback.call(options.scope, resp);
}
},
/**
* Method: parseFeatures
* Read HTTP response body and return features.
*
* Parameters:
* request - {XMLHttpRequest} The request object
*
* Returns:
* {Array({<OpenLayers.Feature.Vector>})} or
* {<OpenLayers.Feature.Vector>} Array of features or a single feature.
*/
parseFeatures: function(request) {
var doc = request.responseXML;
if (!doc || !doc.documentElement) {
doc = request.responseText;
}
if (!doc || doc.length <= 0) {
return null;
}
return this.format.read(doc);
},
/**
* APIMethod: commit
* Iterate over each feature and take action based on the feature state.
* Possible actions are create, update and delete.
*
* Parameters:
* features - {Array({<OpenLayers.Feature.Vector>})}
* options - {Object} Optional object for setting up intermediate commit
* callbacks.
*
* Valid options:
* create - {Object} Optional object to be passed to the <create> method.
* update - {Object} Optional object to be passed to the <update> method.
* delete - {Object} Optional object to be passed to the <delete> method.
* callback - {Function} Optional function to be called when the commit
* is complete.
* scope - {Object} Optional object to be set as the scope of the callback.
*
* Returns:
* {Array(<OpenLayers.Protocol.Response>)} An array of response objects,
* one per request made to the server, each object's "priv" property
* references the corresponding HTTP request.
*/
commit: function(features, options) {
options = OpenLayers.Util.applyDefaults(options, this.options);
var resp = [], nResponses = 0;
// Divide up features before issuing any requests. This properly
// counts requests in the event that any responses come in before
// all requests have been issued.
var types = {};
types[OpenLayers.State.INSERT] = [];
types[OpenLayers.State.UPDATE] = [];
types[OpenLayers.State.DELETE] = [];
var feature, list, requestFeatures = [];
for(var i=0, len=features.length; i<len; ++i) {
feature = features[i];
list = types[feature.state];
if(list) {
list.push(feature);
requestFeatures.push(feature);
}
}
// tally up number of requests
var nRequests = (types[OpenLayers.State.INSERT].length > 0 ? 1 : 0) +
types[OpenLayers.State.UPDATE].length +
types[OpenLayers.State.DELETE].length;
// This response will be sent to the final callback after all the others
// have been fired.
var success = true;
var finalResponse = new OpenLayers.Protocol.Response({
reqFeatures: requestFeatures
});
function insertCallback(response) {
var len = response.features ? response.features.length : 0;
var fids = new Array(len);
for(var i=0; i<len; ++i) {
fids[i] = response.features[i].fid;
}
finalResponse.insertIds = fids;
callback.apply(this, [response]);
}
function callback(response) {
this.callUserCallback(response, options);
success = success && response.success();
nResponses++;
if (nResponses >= nRequests) {
if (options.callback) {
finalResponse.code = success ?
OpenLayers.Protocol.Response.SUCCESS :
OpenLayers.Protocol.Response.FAILURE;
options.callback.apply(options.scope, [finalResponse]);
}
}
}
// start issuing requests
var queue = types[OpenLayers.State.INSERT];
if(queue.length > 0) {
resp.push(this.create(
queue, OpenLayers.Util.applyDefaults(
{callback: insertCallback, scope: this}, options.create
)
));
}
queue = types[OpenLayers.State.UPDATE];
for(var i=queue.length-1; i>=0; --i) {
resp.push(this.update(
queue[i], OpenLayers.Util.applyDefaults(
{callback: callback, scope: this}, options.update
))
);
}
queue = types[OpenLayers.State.DELETE];
for(var i=queue.length-1; i>=0; --i) {
resp.push(this["delete"](
queue[i], OpenLayers.Util.applyDefaults(
{callback: callback, scope: this}, options["delete"]
))
);
}
return resp;
},
/**
* APIMethod: abort
* Abort an ongoing request, the response object passed to
* this method must come from this HTTP protocol (as a result
* of a create, read, update, delete or commit operation).
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>}
*/
abort: function(response) {
if (response) {
response.priv.abort();
}
},
/**
* Method: callUserCallback
* This method is used from within the commit method each time an
* an HTTP response is received from the server, it is responsible
* for calling the user-supplied callbacks.
*
* Parameters:
* resp - {<OpenLayers.Protocol.Response>}
* options - {Object} The map of options passed to the commit call.
*/
callUserCallback: function(resp, options) {
var opt = options[resp.requestType];
if(opt && opt.callback) {
opt.callback.call(opt.scope, resp);
}
},
CLASS_NAME: "OpenLayers.Protocol.HTTP"
});
/* ======================================================================
OpenLayers/Control/DragPan.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Handler/Drag.js
*/
/**
* Class: OpenLayers.Control.DragPan
* The DragPan control pans the map with a drag of the mouse.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.DragPan = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: type
* {OpenLayers.Control.TYPES}
*/
type: OpenLayers.Control.TYPE_TOOL,
/**
* Property: panned
* {Boolean} The map moved.
*/
panned: false,
/**
* Property: interval
* {Integer} The number of milliseconds that should ellapse before
* panning the map again. Defaults to 0 milliseconds, which means that
* no separate cycle is used for panning. In most cases you won't want
* to change this value. For slow machines/devices larger values can be
* tried out.
*/
interval: 0,
/**
* APIProperty: documentDrag
* {Boolean} If set to true, mouse dragging will continue even if the
* mouse cursor leaves the map viewport. Default is false.
*/
documentDrag: false,
/**
* Property: kinetic
* {<OpenLayers.Kinetic>} The OpenLayers.Kinetic object.
*/
kinetic: null,
/**
* APIProperty: enableKinetic
* {Boolean} Set this option to enable "kinetic dragging". Can be
* set to true or to an object. If set to an object this
* object will be passed to the {<OpenLayers.Kinetic>}
* constructor. Defaults to true.
* To get kinetic dragging, ensure that OpenLayers/Kinetic.js is
* included in your build config.
*/
enableKinetic: true,
/**
* APIProperty: kineticInterval
* {Integer} Interval in milliseconds between 2 steps in the "kinetic
* scrolling". Applies only if enableKinetic is set. Defaults
* to 10 milliseconds.
*/
kineticInterval: 10,
/**
* Method: draw
* Creates a Drag handler, using <panMap> and
* <panMapDone> as callbacks.
*/
draw: function() {
if (this.enableKinetic && OpenLayers.Kinetic) {
var config = {interval: this.kineticInterval};
if(typeof this.enableKinetic === "object") {
config = OpenLayers.Util.extend(config, this.enableKinetic);
}
this.kinetic = new OpenLayers.Kinetic(config);
}
this.handler = new OpenLayers.Handler.Drag(this, {
"move": this.panMap,
"done": this.panMapDone,
"down": this.panMapStart
}, {
interval: this.interval,
documentDrag: this.documentDrag
}
);
},
/**
* Method: panMapStart
*/
panMapStart: function() {
if(this.kinetic) {
this.kinetic.begin();
}
},
/**
* Method: panMap
*
* Parameters:
* xy - {<OpenLayers.Pixel>} Pixel of the mouse position
*/
panMap: function(xy) {
if(this.kinetic) {
this.kinetic.update(xy);
}
this.panned = true;
this.map.pan(
this.handler.last.x - xy.x,
this.handler.last.y - xy.y,
{dragging: true, animate: false}
);
},
/**
* Method: panMapDone
* Finish the panning operation. Only call setCenter (through <panMap>)
* if the map has actually been moved.
*
* Parameters:
* xy - {<OpenLayers.Pixel>} Pixel of the mouse position
*/
panMapDone: function(xy) {
if(this.panned) {
var res = null;
if (this.kinetic) {
res = this.kinetic.end(xy);
}
this.map.pan(
this.handler.last.x - xy.x,
this.handler.last.y - xy.y,
{dragging: !!res, animate: false}
);
if (res) {
var self = this;
this.kinetic.move(res, function(x, y, end) {
self.map.pan(x, y, {dragging: !end, animate: false});
});
}
this.panned = false;
}
},
CLASS_NAME: "OpenLayers.Control.DragPan"
});
/* ======================================================================
OpenLayers/Control/PinchZoom.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler/Pinch.js
*/
/**
* Class: OpenLayers.Control.PinchZoom
*
* Inherits:
* - <OpenLayers.Control>
*/
OpenLayers.Control.PinchZoom = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: type
* {OpenLayers.Control.TYPES}
*/
type: OpenLayers.Control.TYPE_TOOL,
/**
* Property: pinchOrigin
* {Object} Cached object representing the pinch start (in pixels).
*/
pinchOrigin: null,
/**
* Property: currentCenter
* {Object} Cached object representing the latest pinch center (in pixels).
*/
currentCenter: null,
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* true.
*/
autoActivate: true,
/**
* APIProperty: preserveCenter
* {Boolean} Set this to true if you don't want the map center to change
* while pinching. For example you may want to set preserveCenter to
* true when the user location is being watched and you want to preserve
* the user location at the center of the map even if he zooms in or
* out using pinch. This property's value can be changed any time on an
* existing instance. Default is false.
*/
preserveCenter: false,
/**
* APIProperty: handlerOptions
* {Object} Used to set non-default properties on the pinch handler
*/
/**
* Constructor: OpenLayers.Control.PinchZoom
* Create a control for zooming with pinch gestures. This works on devices
* with multi-touch support.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* the control
*/
initialize: function(options) {
OpenLayers.Control.prototype.initialize.apply(this, arguments);
this.handler = new OpenLayers.Handler.Pinch(this, {
start: this.pinchStart,
move: this.pinchMove,
done: this.pinchDone
}, this.handlerOptions);
},
/**
* Method: pinchStart
*
* Parameters:
* evt - {Event}
* pinchData - {Object} pinch data object related to the current touchmove
* of the pinch gesture. This give us the current scale of the pinch.
*/
pinchStart: function(evt, pinchData) {
var xy = (this.preserveCenter) ?
this.map.getPixelFromLonLat(this.map.getCenter()) : evt.xy;
this.pinchOrigin = xy;
this.currentCenter = xy;
},
/**
* Method: pinchMove
*
* Parameters:
* evt - {Event}
* pinchData - {Object} pinch data object related to the current touchmove
* of the pinch gesture. This give us the current scale of the pinch.
*/
pinchMove: function(evt, pinchData) {
var scale = pinchData.scale;
var containerOrigin = this.map.layerContainerOriginPx;
var pinchOrigin = this.pinchOrigin;
var current = (this.preserveCenter) ?
this.map.getPixelFromLonLat(this.map.getCenter()) : evt.xy;
var dx = Math.round((containerOrigin.x + current.x - pinchOrigin.x) + (scale - 1) * (containerOrigin.x - pinchOrigin.x));
var dy = Math.round((containerOrigin.y + current.y - pinchOrigin.y) + (scale - 1) * (containerOrigin.y - pinchOrigin.y));
this.map.applyTransform(dx, dy, scale);
this.currentCenter = current;
},
/**
* Method: pinchDone
*
* Parameters:
* evt - {Event}
* start - {Object} pinch data object related to the touchstart event that
* started the pinch gesture.
* last - {Object} pinch data object related to the last touchmove event
* of the pinch gesture. This give us the final scale of the pinch.
*/
pinchDone: function(evt, start, last) {
this.map.applyTransform();
var zoom = this.map.getZoomForResolution(this.map.getResolution() / last.scale, true);
if (zoom !== this.map.getZoom() || !this.currentCenter.equals(this.pinchOrigin)) {
var resolution = this.map.getResolutionForZoom(zoom);
var location = this.map.getLonLatFromPixel(this.pinchOrigin);
var zoomPixel = this.currentCenter;
var size = this.map.getSize();
location.lon += resolution * ((size.w / 2) - zoomPixel.x);
location.lat -= resolution * ((size.h / 2) - zoomPixel.y);
// Force a reflow before calling setCenter. This is to work
// around an issue occuring in iOS.
//
// See https://github.com/openlayers/openlayers/pull/351.
//
// Without a reflow setting the layer container div's top left
// style properties to "0px" - as done in Map.moveTo when zoom
// is changed - won't actually correctly reposition the layer
// container div.
//
// Also, we need to use a statement that the Google Closure
// compiler won't optimize away.
this.map.div.clientWidth = this.map.div.clientWidth;
this.map.setCenter(location, zoom);
}
},
CLASS_NAME: "OpenLayers.Control.PinchZoom"
});
/* ======================================================================
OpenLayers/Handler/Click.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
*/
/**
* Class: OpenLayers.Handler.Click
* A handler for mouse clicks. The intention of this handler is to give
* controls more flexibility with handling clicks. Browsers trigger
* click events twice for a double-click. In addition, the mousedown,
* mousemove, mouseup sequence fires a click event. With this handler,
* controls can decide whether to ignore clicks associated with a double
* click. By setting a <pixelTolerance>, controls can also ignore clicks
* that include a drag. Create a new instance with the
* <OpenLayers.Handler.Click> constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Click = OpenLayers.Class(OpenLayers.Handler, {
/**
* APIProperty: delay
* {Number} Number of milliseconds between clicks before the event is
* considered a double-click.
*/
delay: 300,
/**
* APIProperty: single
* {Boolean} Handle single clicks. Default is true. If false, clicks
* will not be reported. If true, single-clicks will be reported.
*/
single: true,
/**
* APIProperty: double
* {Boolean} Handle double-clicks. Default is false.
*/
'double': false,
/**
* APIProperty: pixelTolerance
* {Number} Maximum number of pixels between mouseup and mousedown for an
* event to be considered a click. Default is 0. If set to an
* integer value, clicks with a drag greater than the value will be
* ignored. This property can only be set when the handler is
* constructed.
*/
pixelTolerance: 0,
/**
* APIProperty: dblclickTolerance
* {Number} Maximum distance in pixels between clicks for a sequence of
* events to be considered a double click. Default is 13. If the
* distance between two clicks is greater than this value, a double-
* click will not be fired.
*/
dblclickTolerance: 13,
/**
* APIProperty: stopSingle
* {Boolean} Stop other listeners from being notified of clicks. Default
* is false. If true, any listeners registered before this one for
* click or rightclick events will not be notified.
*/
stopSingle: false,
/**
* APIProperty: stopDouble
* {Boolean} Stop other listeners from being notified of double-clicks.
* Default is false. If true, any click listeners registered before
* this one will not be notified of *any* double-click events.
*
* The one caveat with stopDouble is that given a map with two click
* handlers, one with stopDouble true and the other with stopSingle
* true, the stopSingle handler should be activated last to get
* uniform cross-browser performance. Since IE triggers one click
* with a dblclick and FF triggers two, if a stopSingle handler is
* activated first, all it gets in IE is a single click when the
* second handler stops propagation on the dblclick.
*/
stopDouble: false,
/**
* Property: timerId
* {Number} The id of the timeout waiting to clear the <delayedCall>.
*/
timerId: null,
/**
* Property: down
* {Object} Object that store relevant information about the last
* mousedown or touchstart. Its 'xy' OpenLayers.Pixel property gives
* the average location of the mouse/touch event. Its 'touches'
* property records clientX/clientY of each touches.
*/
down: null,
/**
* Property: last
* {Object} Object that store relevant information about the last
* mousemove or touchmove. Its 'xy' OpenLayers.Pixel property gives
* the average location of the mouse/touch event. Its 'touches'
* property records clientX/clientY of each touches.
*/
last: null,
/**
* Property: first
* {Object} When waiting for double clicks, this object will store
* information about the first click in a two click sequence.
*/
first: null,
/**
* Property: rightclickTimerId
* {Number} The id of the right mouse timeout waiting to clear the
* <delayedEvent>.
*/
rightclickTimerId: null,
/**
* Constructor: OpenLayers.Handler.Click
* Create a new click handler.
*
* Parameters:
* control - {<OpenLayers.Control>} The control that is making use of
* this handler. If a handler is being used without a control, the
* handler's setMap method must be overridden to deal properly with
* the map.
* callbacks - {Object} An object with keys corresponding to callbacks
* that will be called by the handler. The callbacks should
* expect to recieve a single argument, the click event.
* Callbacks for 'click' and 'dblclick' are supported.
* options - {Object} Optional object whose properties will be set on the
* handler.
*/
/**
* Method: touchstart
* Handle touchstart.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
touchstart: function(evt) {
this.startTouch();
this.down = this.getEventInfo(evt);
this.last = this.getEventInfo(evt);
return true;
},
/**
* Method: touchmove
* Store position of last move, because touchend event can have
* an empty "touches" property.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
touchmove: function(evt) {
this.last = this.getEventInfo(evt);
return true;
},
/**
* Method: touchend
* Correctly set event xy property, and add lastTouches to have
* touches property from last touchstart or touchmove
*
* Returns:
* {Boolean} Continue propagating this event.
*/
touchend: function(evt) {
// touchstart may not have been allowed to propagate
if (this.down) {
evt.xy = this.last.xy;
evt.lastTouches = this.last.touches;
this.handleSingle(evt);
this.down = null;
}
return true;
},
/**
* Method: mousedown
* Handle mousedown.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
mousedown: function(evt) {
this.down = this.getEventInfo(evt);
this.last = this.getEventInfo(evt);
return true;
},
/**
* Method: mouseup
* Handle mouseup. Installed to support collection of right mouse events.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
mouseup: function (evt) {
var propagate = true;
// Collect right mouse clicks from the mouseup
// IE - ignores the second right click in mousedown so using
// mouseup instead
if (this.checkModifiers(evt) && this.control.handleRightClicks &&
OpenLayers.Event.isRightClick(evt)) {
propagate = this.rightclick(evt);
}
return propagate;
},
/**
* Method: rightclick
* Handle rightclick. For a dblrightclick, we get two clicks so we need
* to always register for dblrightclick to properly handle single
* clicks.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
rightclick: function(evt) {
if(this.passesTolerance(evt)) {
if(this.rightclickTimerId != null) {
//Second click received before timeout this must be
// a double click
this.clearTimer();
this.callback('dblrightclick', [evt]);
return !this.stopDouble;
} else {
//Set the rightclickTimerId, send evt only if double is
// true else trigger single
var clickEvent = this['double'] ?
OpenLayers.Util.extend({}, evt) :
this.callback('rightclick', [evt]);
var delayedRightCall = OpenLayers.Function.bind(
this.delayedRightCall,
this,
clickEvent
);
this.rightclickTimerId = window.setTimeout(
delayedRightCall, this.delay
);
}
}
return !this.stopSingle;
},
/**
* Method: delayedRightCall
* Sets <rightclickTimerId> to null. And optionally triggers the
* rightclick callback if evt is set.
*/
delayedRightCall: function(evt) {
this.rightclickTimerId = null;
if (evt) {
this.callback('rightclick', [evt]);
}
},
/**
* Method: click
* Handle click events from the browser. This is registered as a listener
* for click events and should not be called from other events in this
* handler.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
click: function(evt) {
if (!this.last) {
this.last = this.getEventInfo(evt);
}
this.handleSingle(evt);
return !this.stopSingle;
},
/**
* Method: dblclick
* Handle dblclick. For a dblclick, we get two clicks in some browsers
* (FF) and one in others (IE). So we need to always register for
* dblclick to properly handle single clicks. This method is registered
* as a listener for the dblclick browser event. It should *not* be
* called by other methods in this handler.
*
* Returns:
* {Boolean} Continue propagating this event.
*/
dblclick: function(evt) {
this.handleDouble(evt);
return !this.stopDouble;
},
/**
* Method: handleDouble
* Handle double-click sequence.
*/
handleDouble: function(evt) {
if (this.passesDblclickTolerance(evt)) {
if (this["double"]) {
this.callback("dblclick", [evt]);
}
// to prevent a dblclick from firing the click callback in IE
this.clearTimer();
}
},
/**
* Method: handleSingle
* Handle single click sequence.
*/
handleSingle: function(evt) {
if (this.passesTolerance(evt)) {
if (this.timerId != null) {
// already received a click
if (this.last.touches && this.last.touches.length === 1) {
// touch device, no dblclick event - this may be a double
if (this["double"]) {
// on Android don't let the browser zoom on the page
OpenLayers.Event.preventDefault(evt);
}
this.handleDouble(evt);
}
// if we're not in a touch environment we clear the click timer
// if we've got a second touch, we'll get two touchend events
if (!this.last.touches || this.last.touches.length !== 2) {
this.clearTimer();
}
} else {
// remember the first click info so we can compare to the second
this.first = this.getEventInfo(evt);
// set the timer, send evt only if single is true
//use a clone of the event object because it will no longer
//be a valid event object in IE in the timer callback
var clickEvent = this.single ?
OpenLayers.Util.extend({}, evt) : null;
this.queuePotentialClick(clickEvent);
}
}
},
/**
* Method: queuePotentialClick
* This method is separated out largely to make testing easier (so we
* don't have to override window.setTimeout)
*/
queuePotentialClick: function(evt) {
this.timerId = window.setTimeout(
OpenLayers.Function.bind(this.delayedCall, this, evt),
this.delay
);
},
/**
* Method: passesTolerance
* Determine whether the event is within the optional pixel tolerance. Note
* that the pixel tolerance check only works if mousedown events get to
* the listeners registered here. If they are stopped by other elements,
* the <pixelTolerance> will have no effect here (this method will always
* return true).
*
* Returns:
* {Boolean} The click is within the pixel tolerance (if specified).
*/
passesTolerance: function(evt) {
var passes = true;
if (this.pixelTolerance != null && this.down && this.down.xy) {
passes = this.pixelTolerance >= this.down.xy.distanceTo(evt.xy);
// for touch environments, we also enforce that all touches
// start and end within the given tolerance to be considered a click
if (passes && this.touch &&
this.down.touches.length === this.last.touches.length) {
// the touchend event doesn't come with touches, so we check
// down and last
for (var i=0, ii=this.down.touches.length; i<ii; ++i) {
if (this.getTouchDistance(
this.down.touches[i],
this.last.touches[i]
) > this.pixelTolerance) {
passes = false;
break;
}
}
}
}
return passes;
},
/**
* Method: getTouchDistance
*
* Returns:
* {Boolean} The pixel displacement between two touches.
*/
getTouchDistance: function(from, to) {
return Math.sqrt(
Math.pow(from.clientX - to.clientX, 2) +
Math.pow(from.clientY - to.clientY, 2)
);
},
/**
* Method: passesDblclickTolerance
* Determine whether the event is within the optional double-cick pixel
* tolerance.
*
* Returns:
* {Boolean} The click is within the double-click pixel tolerance.
*/
passesDblclickTolerance: function(evt) {
var passes = true;
if (this.down && this.first) {
passes = this.down.xy.distanceTo(this.first.xy) <= this.dblclickTolerance;
}
return passes;
},
/**
* Method: clearTimer
* Clear the timer and set <timerId> to null.
*/
clearTimer: function() {
if (this.timerId != null) {
window.clearTimeout(this.timerId);
this.timerId = null;
}
if (this.rightclickTimerId != null) {
window.clearTimeout(this.rightclickTimerId);
this.rightclickTimerId = null;
}
},
/**
* Method: delayedCall
* Sets <timerId> to null. And optionally triggers the click callback if
* evt is set.
*/
delayedCall: function(evt) {
this.timerId = null;
if (evt) {
this.callback("click", [evt]);
}
},
/**
* Method: getEventInfo
* This method allows us to store event information without storing the
* actual event. In touch devices (at least), the same event is
* modified between touchstart, touchmove, and touchend.
*
* Returns:
* {Object} An object with event related info.
*/
getEventInfo: function(evt) {
var touches;
if (evt.touches) {
var len = evt.touches.length;
touches = new Array(len);
var touch;
for (var i=0; i<len; i++) {
touch = evt.touches[i];
touches[i] = {
clientX: touch.olClientX,
clientY: touch.olClientY
};
}
}
return {
xy: evt.xy,
touches: touches
};
},
/**
* APIMethod: deactivate
* Deactivate the handler.
*
* Returns:
* {Boolean} The handler was successfully deactivated.
*/
deactivate: function() {
var deactivated = false;
if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
this.clearTimer();
this.down = null;
this.first = null;
this.last = null;
deactivated = true;
}
return deactivated;
},
CLASS_NAME: "OpenLayers.Handler.Click"
});
/* ======================================================================
OpenLayers/Control/TouchNavigation.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control/DragPan.js
* @requires OpenLayers/Control/PinchZoom.js
* @requires OpenLayers/Handler/Click.js
*/
/**
* Class: OpenLayers.Control.TouchNavigation
* The navigation control handles map browsing with touch events (dragging,
* double-tapping, tap with two fingers, and pinch zoom). Create a new
* control with the <OpenLayers.Control.TouchNavigation> constructor.
*
* If you’re only targeting touch enabled devices with your mapping application,
* you can create a map with only a TouchNavigation control. The
* <OpenLayers.Control.Navigation> control is mobile ready by default, but
* you can generate a smaller build of the library by only including this
* touch navigation control if you aren't concerned about mouse interaction.
*
* Inherits:
* - <OpenLayers.Control>
*/
OpenLayers.Control.TouchNavigation = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: dragPan
* {<OpenLayers.Control.DragPan>}
*/
dragPan: null,
/**
* APIProperty: dragPanOptions
* {Object} Options passed to the DragPan control.
*/
dragPanOptions: null,
/**
* Property: pinchZoom
* {<OpenLayers.Control.PinchZoom>}
*/
pinchZoom: null,
/**
* APIProperty: pinchZoomOptions
* {Object} Options passed to the PinchZoom control.
*/
pinchZoomOptions: null,
/**
* APIProperty: clickHandlerOptions
* {Object} Options passed to the Click handler.
*/
clickHandlerOptions: null,
/**
* APIProperty: documentDrag
* {Boolean} Allow panning of the map by dragging outside map viewport.
* Default is false.
*/
documentDrag: false,
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* true.
*/
autoActivate: true,
/**
* Constructor: OpenLayers.Control.TouchNavigation
* Create a new navigation control
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* the control
*/
initialize: function(options) {
this.handlers = {};
OpenLayers.Control.prototype.initialize.apply(this, arguments);
},
/**
* Method: destroy
* The destroy method is used to perform any clean up before the control
* is dereferenced. Typically this is where event listeners are removed
* to prevent memory leaks.
*/
destroy: function() {
this.deactivate();
if(this.dragPan) {
this.dragPan.destroy();
}
this.dragPan = null;
if (this.pinchZoom) {
this.pinchZoom.destroy();
delete this.pinchZoom;
}
OpenLayers.Control.prototype.destroy.apply(this,arguments);
},
/**
* Method: activate
*/
activate: function() {
if(OpenLayers.Control.prototype.activate.apply(this,arguments)) {
this.dragPan.activate();
this.handlers.click.activate();
this.pinchZoom.activate();
return true;
}
return false;
},
/**
* Method: deactivate
*/
deactivate: function() {
if(OpenLayers.Control.prototype.deactivate.apply(this,arguments)) {
this.dragPan.deactivate();
this.handlers.click.deactivate();
this.pinchZoom.deactivate();
return true;
}
return false;
},
/**
* Method: draw
*/
draw: function() {
var clickCallbacks = {
click: this.defaultClick,
dblclick: this.defaultDblClick
};
var clickOptions = OpenLayers.Util.extend({
"double": true,
stopDouble: true,
pixelTolerance: 2
}, this.clickHandlerOptions);
this.handlers.click = new OpenLayers.Handler.Click(
this, clickCallbacks, clickOptions
);
this.dragPan = new OpenLayers.Control.DragPan(
OpenLayers.Util.extend({
map: this.map,
documentDrag: this.documentDrag
}, this.dragPanOptions)
);
this.dragPan.draw();
this.pinchZoom = new OpenLayers.Control.PinchZoom(
OpenLayers.Util.extend({map: this.map}, this.pinchZoomOptions)
);
},
/**
* Method: defaultClick
*
* Parameters:
* evt - {Event}
*/
defaultClick: function (evt) {
if(evt.lastTouches && evt.lastTouches.length == 2) {
this.map.zoomOut();
}
},
/**
* Method: defaultDblClick
*
* Parameters:
* evt - {Event}
*/
defaultDblClick: function (evt) {
this.map.zoomTo(this.map.zoom + 1, evt.xy);
},
CLASS_NAME: "OpenLayers.Control.TouchNavigation"
});
/* ======================================================================
OpenLayers/Protocol/WFS/v1_0_0.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Protocol/WFS/v1.js
* @requires OpenLayers/Format/WFST/v1_0_0.js
*/
/**
* Class: OpenLayers.Protocol.WFS.v1_0_0
* A WFS v1.0.0 protocol for vector layers. Create a new instance with the
* <OpenLayers.Protocol.WFS.v1_0_0> constructor.
*
* Inherits from:
* - <OpenLayers.Protocol.WFS.v1>
*/
OpenLayers.Protocol.WFS.v1_0_0 = OpenLayers.Class(OpenLayers.Protocol.WFS.v1, {
/**
* Property: version
* {String} WFS version number.
*/
version: "1.0.0",
/**
* Constructor: OpenLayers.Protocol.WFS.v1_0_0
* A class for giving layers WFS v1.0.0 protocol.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Valid options properties:
* featureType - {String} Local (without prefix) feature typeName (required).
* featureNS - {String} Feature namespace (optional).
* featurePrefix - {String} Feature namespace alias (optional - only used
* if featureNS is provided). Default is 'feature'.
* geometryName - {String} Name of geometry attribute. Default is 'the_geom'.
*/
CLASS_NAME: "OpenLayers.Protocol.WFS.v1_0_0"
});
/* ======================================================================
OpenLayers/TileManager.js
====================================================================== */
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Util.js
* @requires OpenLayers/BaseTypes.js
* @requires OpenLayers/BaseTypes/Element.js
* @requires OpenLayers/Layer/Grid.js
* @requires OpenLayers/Tile/Image.js
*/
/**
* Class: OpenLayers.TileManager
* Provides queueing of image requests and caching of image elements.
*
* Queueing avoids unnecessary image requests while changing zoom levels
* quickly, and helps improve dragging performance on mobile devices that show
* a lag in dragging when loading of new images starts. <zoomDelay> and
* <moveDelay> are the configuration options to control this behavior.
*
* Caching avoids setting the src on image elements for images that have already
* been used. Several maps can share a TileManager instance, in which case each
* map gets its own tile queue, but all maps share the same tile cache.
*/
OpenLayers.TileManager = OpenLayers.Class({
/**
* APIProperty: cacheSize
* {Number} Number of image elements to keep referenced in this instance's
* cache for fast reuse. Default is 256.
*/
cacheSize: 256,
/**
* APIProperty: tilesPerFrame
* {Number} Number of queued tiles to load per frame (see <frameDelay>).
* Default is 2.
*/
tilesPerFrame: 2,
/**
* APIProperty: frameDelay
* {Number} Delay between tile loading frames (see <tilesPerFrame>) in
* milliseconds. Default is 16.
*/
frameDelay: 16,
/**
* APIProperty: moveDelay
* {Number} Delay in milliseconds after a map's move event before loading
* tiles. Default is 100.
*/
moveDelay: 100,
/**
* APIProperty: zoomDelay
* {Number} Delay in milliseconds after a map's zoomend event before loading
* tiles. Default is 200.
*/
zoomDelay: 200,
/**
* Property: maps
* {Array(<OpenLayers.Map>)} The maps to manage tiles on.
*/
maps: null,
/**
* Property: tileQueueId
* {Object} The ids of the <drawTilesFromQueue> loop, keyed by map id.
*/
tileQueueId: null,
/**
* Property: tileQueue
* {Object(Array(<OpenLayers.Tile>))} Tiles queued for drawing, keyed by
* map id.
*/
tileQueue: null,
/**
* Property: tileCache
* {Object} Cached image elements, keyed by URL.
*/
tileCache: null,
/**
* Property: tileCacheIndex
* {Array(String)} URLs of cached tiles. First entry is the least recently
* used.
*/
tileCacheIndex: null,
/**
* Constructor: OpenLayers.TileManager
* Constructor for a new <OpenLayers.TileManager> instance.
*
* Parameters:
* options - {Object} Configuration for this instance.
*/
initialize: function(options) {
OpenLayers.Util.extend(this, options);
this.maps = [];
this.tileQueueId = {};
this.tileQueue = {};
this.tileCache = {};
this.tileCacheIndex = [];
},
/**
* Method: addMap
* Binds this instance to a map
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
addMap: function(map) {
if (this._destroyed || !OpenLayers.Layer.Grid) {
return;
}
this.maps.push(map);
this.tileQueue[map.id] = [];
for (var i=0, ii=map.layers.length; i<ii; ++i) {
this.addLayer({layer: map.layers[i]});
}
map.events.on({
move: this.move,
zoomend: this.zoomEnd,
changelayer: this.changeLayer,
addlayer: this.addLayer,
preremovelayer: this.removeLayer,
scope: this
});
},
/**
* Method: removeMap
* Unbinds this instance from a map
*
* Parameters:
* map - {<OpenLayers.Map>}
*/
removeMap: function(map) {
if (this._destroyed || !OpenLayers.Layer.Grid) {
return;
}
window.clearTimeout(this.tileQueueId[map.id]);
if (map.layers) {
for (var i=0, ii=map.layers.length; i<ii; ++i) {
this.removeLayer({layer: map.layers[i]});
}
}
if (map.events) {
map.events.un({
move: this.move,
zoomend: this.zoomEnd,
changelayer: this.changeLayer,
addlayer: this.addLayer,
preremovelayer: this.removeLayer,
scope: this
});
}
delete this.tileQueue[map.id];
delete this.tileQueueId[map.id];
OpenLayers.Util.removeItem(this.maps, map);
},
/**
* Method: move
* Handles the map's move event
*
* Parameters:
* evt - {Object} Listener argument
*/
move: function(evt) {
this.updateTimeout(evt.object, this.moveDelay, true);
},
/**
* Method: zoomEnd
* Handles the map's zoomEnd event
*
* Parameters:
* evt - {Object} Listener argument
*/
zoomEnd: function(evt) {
this.updateTimeout(evt.object, this.zoomDelay);
},
/**
* Method: changeLayer
* Handles the map's changeLayer event
*
* Parameters:
* evt - {Object} Listener argument
*/
changeLayer: function(evt) {
if (evt.property === 'visibility' || evt.property === 'params') {
this.updateTimeout(evt.object, 0);
}
},
/**
* Method: addLayer
* Handles the map's addlayer event
*
* Parameters:
* evt - {Object} The listener argument
*/
addLayer: function(evt) {
var layer = evt.layer;
if (layer instanceof OpenLayers.Layer.Grid) {
layer.events.on({
addtile: this.addTile,
retile: this.clearTileQueue,
scope: this
});
var i, j, tile;
for (i=layer.grid.length-1; i>=0; --i) {
for (j=layer.grid[i].length-1; j>=0; --j) {
tile = layer.grid[i][j];
this.addTile({tile: tile});
if (tile.url && !tile.imgDiv) {
this.manageTileCache({object: tile});
}
}
}
}
},
/**
* Method: removeLayer
* Handles the map's preremovelayer event
*
* Parameters:
* evt - {Object} The listener argument
*/
removeLayer: function(evt) {
var layer = evt.layer;
if (layer instanceof OpenLayers.Layer.Grid) {
this.clearTileQueue({object: layer});
if (layer.events) {
layer.events.un({
addtile: this.addTile,
retile: this.clearTileQueue,
scope: this
});
}
if (layer.grid) {
var i, j, tile;
for (i=layer.grid.length-1; i>=0; --i) {
for (j=layer.grid[i].length-1; j>=0; --j) {
tile = layer.grid[i][j];
this.unloadTile({object: tile});
}
}
}
}
},
/**
* Method: updateTimeout
* Applies the <moveDelay> or <zoomDelay> to the <drawTilesFromQueue> loop,
* and schedules more queue processing after <frameDelay> if there are still
* tiles in the queue.
*
* Parameters:
* map - {<OpenLayers.Map>} The map to update the timeout for
* delay - {Number} The delay to apply
* nice - {Boolean} If true, the timeout function will only be created if
* the tilequeue is not empty. This is used by the move handler to
* avoid impacts on dragging performance. For other events, the tile
* queue may not be populated yet, so we need to set the timer
* regardless of the queue size.
*/
updateTimeout: function(map, delay, nice) {
window.clearTimeout(this.tileQueueId[map.id]);
var tileQueue = this.tileQueue[map.id];
if (!nice || tileQueue.length) {
this.tileQueueId[map.id] = window.setTimeout(
OpenLayers.Function.bind(function() {
this.drawTilesFromQueue(map);
if (tileQueue.length) {
this.updateTimeout(map, this.frameDelay);
}
}, this), delay
);
}
},
/**
* Method: addTile
* Listener for the layer's addtile event
*
* Parameters:
* evt - {Object} The listener argument
*/
addTile: function(evt) {
if (evt.tile instanceof OpenLayers.Tile.Image) {
evt.tile.events.on({
beforedraw: this.queueTileDraw,
beforeload: this.manageTileCache,
loadend: this.addToCache,
unload: this.unloadTile,
scope: this
});
} else {
// Layer has the wrong tile type, so don't handle it any longer
this.removeLayer({layer: evt.tile.layer});
}
},
/**
* Method: unloadTile
* Listener for the tile's unload event
*
* Parameters:
* evt - {Object} The listener argument
*/
unloadTile: function(evt) {
var tile = evt.object;
tile.events.un({
beforedraw: this.queueTileDraw,
beforeload: this.manageTileCache,
loadend: this.addToCache,
unload: this.unloadTile,
scope: this
});
OpenLayers.Util.removeItem(this.tileQueue[tile.layer.map.id], tile);
},
/**
* Method: queueTileDraw
* Adds a tile to the queue that will draw it.
*
* Parameters:
* evt - {Object} Listener argument of the tile's beforedraw event
*/
queueTileDraw: function(evt) {
var tile = evt.object;
var queued = false;
var layer = tile.layer;
var url = layer.getURL(tile.bounds);
var img = this.tileCache[url];
if (img && img.className !== 'olTileImage') {
// cached image no longer valid, e.g. because we're olTileReplacing
delete this.tileCache[url];
OpenLayers.Util.removeItem(this.tileCacheIndex, url);
img = null;
}
// queue only if image with same url not cached already
if (layer.url && (layer.async || !img)) {
// add to queue only if not in queue already
var tileQueue = this.tileQueue[layer.map.id];
if (!~OpenLayers.Util.indexOf(tileQueue, tile)) {
tileQueue.push(tile);
}
queued = true;
}
return !queued;
},
/**
* Method: drawTilesFromQueue
* Draws tiles from the tileQueue, and unqueues the tiles
*/
drawTilesFromQueue: function(map) {
var tileQueue = this.tileQueue[map.id];
var limit = this.tilesPerFrame;
var animating = map.zoomTween && map.zoomTween.playing;
while (!animating && tileQueue.length && limit) {
tileQueue.shift().draw(true);
--limit;
}
},
/**
* Method: manageTileCache
* Adds, updates, removes and fetches cache entries.
*
* Parameters:
* evt - {Object} Listener argument of the tile's beforeload event
*/
manageTileCache: function(evt) {
var tile = evt.object;
var img = this.tileCache[tile.url];
if (img) {
// if image is on its layer's backbuffer, remove it from backbuffer
if (img.parentNode &&
OpenLayers.Element.hasClass(img.parentNode, 'olBackBuffer')) {
img.parentNode.removeChild(img);
img.id = null;
}
// only use image from cache if it is not on a layer already
if (!img.parentNode) {
img.style.visibility = 'hidden';
img.style.opacity = 0;
tile.setImage(img);
// LRU - move tile to the end of the array to mark it as the most
// recently used
OpenLayers.Util.removeItem(this.tileCacheIndex, tile.url);
this.tileCacheIndex.push(tile.url);
}
}
},
/**
* Method: addToCache
*
* Parameters:
* evt - {Object} Listener argument for the tile's loadend event
*/
addToCache: function(evt) {
var tile = evt.object;
if (!this.tileCache[tile.url]) {
if (!OpenLayers.Element.hasClass(tile.imgDiv, 'olImageLoadError')) {
if (this.tileCacheIndex.length >= this.cacheSize) {
delete this.tileCache[this.tileCacheIndex[0]];
this.tileCacheIndex.shift();
}
this.tileCache[tile.url] = tile.imgDiv;
this.tileCacheIndex.push(tile.url);
}
}
},
/**
* Method: clearTileQueue
* Clears the tile queue from tiles of a specific layer
*
* Parameters:
* evt - {Object} Listener argument of the layer's retile event
*/
clearTileQueue: function(evt) {
var layer = evt.object;
var tileQueue = this.tileQueue[layer.map.id];
for (var i=tileQueue.length-1; i>=0; --i) {
if (tileQueue[i].layer === layer) {
tileQueue.splice(i, 1);
}
}
},
/**
* Method: destroy
*/
destroy: function() {
for (var i=this.maps.length-1; i>=0; --i) {
this.removeMap(this.maps[i]);
}
this.maps = null;
this.tileQueue = null;
this.tileQueueId = null;
this.tileCache = null;
this.tileCacheIndex = null;
this._destroyed = true;
}
});
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