mirror of
https://github.com/Karaka-Management/phpOMS.git
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1187 lines
34 KiB
PHP
1187 lines
34 KiB
PHP
<?php
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/**
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* Orange Management
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*
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* PHP Version 7.1
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*
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* @category TBD
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* @package TBD
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* @copyright Dennis Eichhorn
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* @license OMS License 1.0
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* @license Original license Emanuil Rusev, erusev.com (MIT)
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* @version 1.0.0
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* @link http://website.orange-management.de
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*/
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declare(strict_types = 1);
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namespace phpOMS\Utils\Parser\Markdown;
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/**
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* Markdown parser class.
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*
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* @category Framework
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* @package phpOMS\Utils\Parser
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* @license OMS License 1.0
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* @license Original license Emanuil Rusev, erusev.com (MIT)
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* @link http://website.orange-management.de
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* @since 1.0.0
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*/
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class Markdown
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{
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protected static $blockTypes = [
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'#' => ['Header'],
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'*' => ['Rule', 'List'],
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'+' => ['List'],
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'-' => ['SetextHeader', 'Table', 'Rule', 'List'],
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'0' => ['List'],
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'1' => ['List'],
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'2' => ['List'],
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'3' => ['List'],
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'4' => ['List'],
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'5' => ['List'],
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'6' => ['List'],
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'7' => ['List'],
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'8' => ['List'],
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'9' => ['List'],
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':' => ['Table'],
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'<' => ['Comment', 'Markup'],
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'=' => ['SetextHeader'],
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'>' => ['Quote'],
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'[' => ['Reference'],
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'_' => ['Rule'],
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'`' => ['FencedCode'],
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'|' => ['Table'],
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'~' => ['FencedCode'],
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];
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protected static $unmarkedBlockTypes = [
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'Code',
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];
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protected static $specialCharacters = [
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'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|',
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];
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protected static $strongRegex = [
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'*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
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'_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us',
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];
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protected static $emRegex = [
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'*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
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'_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
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];
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protected static $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?';
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protected static $voidElements = [
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'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
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];
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protected static $textLevelElements = [
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'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
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'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
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'i', 'rp', 'del', 'code', 'strike', 'marquee',
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'q', 'rt', 'ins', 'font', 'strong',
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's', 'tt', 'kbd', 'mark',
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'u', 'xm', 'sub', 'nobr',
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'sup', 'ruby',
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'var', 'span',
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'wbr', 'time',
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];
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protected static $inlineTypes = [
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'"' => ['SpecialCharacter'],
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'!' => ['Image'],
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'&' => ['SpecialCharacter'],
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'*' => ['Emphasis'],
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':' => ['Url'],
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'<' => ['UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'],
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'>' => ['SpecialCharacter'],
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'[' => ['Link'],
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'_' => ['Emphasis'],
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'`' => ['Code'],
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'~' => ['Strikethrough'],
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'\\' => ['EscapeSequence'],
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];
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protected static $inlineMarkerList = '!"*_&[:<>`~\\';
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private static $continuable = [
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'Code', 'Comment', 'FencedCode', 'List', 'Quote', 'Markup', 'Table'
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];
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private static $completable = [
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'Code', 'FencedCode'
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];
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private static $definitionData = [];
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public static function parse(string $text) : string
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{
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self::$definitionData = [];
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$text = str_replace(["\r\n", "\r"], "\n", $text);
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$text = trim($text, "\n");
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$lines = explode("\n", $text);
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$markup = self::lines($lines);
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return trim($markup, "\n");
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}
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protected static function lines(array $lines) : string
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{
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$currentBlock = null;
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foreach ($lines as $line) {
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if (chop($line) === '') {
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if (isset($currentBlock)) {
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$currentBlock['interrupted'] = true;
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}
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continue;
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}
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if (strpos($line, "\t") !== false) {
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$parts = explode("\t", $line);
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$line = $parts[0];
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unset($parts[0]);
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foreach ($parts as $part) {
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$shortage = 4 - mb_strlen($line, 'utf-8') % 4;
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$line .= str_repeat(' ', $shortage);
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$line .= $part;
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}
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}
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$indent = 0;
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while (isset($line[$indent]) && $line[$indent] === ' ') {
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$indent ++;
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}
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$text = $indent > 0 ? substr($line, $indent) : $line;
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$lineArray = ['body' => $line, 'indent' => $indent, 'text' => $text];
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if (isset($currentBlock['continuable'])) {
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$block = self::{'block' . $currentBlock['type'] . 'Continue'}($lineArray, $currentBlock);
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if (isset($block)) {
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$currentBlock = $block;
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continue;
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} elseif (in_array($currentBlock['type'], self::$completable)) {
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$currentBlock = self::{'block' . $currentBlock['type'] . 'Complete'}($currentBlock);
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}
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}
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$marker = $text[0];
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$blockTypes = self::$unmarkedBlockTypes;
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if (isset(self::$blockTypes[$marker])) {
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foreach (self::$blockTypes[$marker] as $blockType) {
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$blockTypes[] = $blockType;
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}
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}
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foreach ($blockTypes as $blockType) {
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$block = self::{'block' . $blockType}($lineArray, $currentBlock);
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if (isset($block)) {
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$block['type'] = $blockType;
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if (!isset($block['identified'])) {
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$blocks[] = $currentBlock;
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$block['identified'] = true;
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}
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if (in_array($blockType, self::$continuable)) {
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$block['continuable'] = true;
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}
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$currentBlock = $block;
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continue 2;
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}
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}
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if (isset($currentBlock) && !isset($currentBlock['type']) && !isset($currentBlock['interrupted'])) {
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$currentBlock['element']['text'] .= "\n" . $text;
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} else {
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$blocks[] = $currentBlock;
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$currentBlock = self::paragraph($lineArray);
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$currentBlock['identified'] = true;
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}
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}
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if (isset($currentBlock['continuable']) && in_array($currentBlock['type'], self::$completable)) {
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$currentBlock = self::{'block' . $currentBlock['type'] . 'Complete'}($currentBlock);
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}
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$blocks[] = $currentBlock;
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unset($blocks[0]);
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$markup = '';
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foreach ($blocks as $block) {
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if (isset($block['hidden'])) {
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continue;
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}
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$markup .= "\n";
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$markup .= isset($block['markup']) ? $block['markup'] : self::element($block['element']);
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}
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$markup .= "\n";
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return $markup;
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}
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protected static function blockCode(array $lineArray, array $block = null) /* : ?array */
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{
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if (isset($block) && !isset($block['type']) && !isset($block['interrupted'])) {
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return;
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}
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if ($lineArray['indent'] < 4) {
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return;
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}
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$text = substr($lineArray['body'], 4);
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$block = [
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'element' => [
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'name' => 'pre',
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'handler' => 'element',
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'text' => [
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'name' => 'code',
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'text' => $text,
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],
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],
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];
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return $block;
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}
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protected static function blockCodeContinue(array $lineArray, array $block) /* : ?array */
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{
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if ($lineArray['indent'] < 4) {
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return;
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}
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if (isset($block['interrupted'])) {
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$block['element']['text']['text'] .= "\n";
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unset($block['interrupted']);
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}
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$block['element']['text']['text'] .= "\n";
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$text = substr($lineArray['body'], 4);
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$block['element']['text']['text'] .= $text;
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return $block;
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}
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protected static function blockCodeComplete(array $block) : array
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{
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$text = $block['element']['text']['text'];
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$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
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$block['element']['text']['text'] = $text;
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return $block;
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}
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protected static function blockComment(array $lineArray) /* : ?array */
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{
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if (
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isset($lineArray['text'][3])
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&& $lineArray['text'][3] === '-'
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&& $lineArray['text'][2] === '-'
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&& $lineArray['text'][1] === '!'
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) {
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$block = ['markup' => $lineArray['body']];
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if (preg_match('/-->$/', $lineArray['text'])) {
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$block['closed'] = true;
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}
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return $block;
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}
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}
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protected static function blockCommentContinue(array $lineArray, array $block) /* : ?array */
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{
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if (isset($block['closed'])) {
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return;
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}
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$block['markup'] .= "\n" . $lineArray['body'];
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if (preg_match('/-->$/', $lineArray['text'])) {
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$block['closed'] = true;
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}
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return $block;
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}
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protected static function blockFencedCode(array $lineArray) /* : ?array */
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{
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if (!preg_match('/^[' . $lineArray['text'][0] . ']{3,}[ ]*([\w-]+)?[ ]*$/', $lineArray['text'], $matches)) {
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return;
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}
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$elementArray = [
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'name' => 'code',
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'text' => '',
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];
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if (isset($matches[1])) {
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$class = 'language-' . $matches[1];
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$elementArray['attributes'] = [
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'class' => $class,
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];
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}
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$block = [
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'char' => $lineArray['text'][0],
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'element' => [
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'name' => 'pre',
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'handler' => 'element',
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'text' => $elementArray,
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]
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];
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return $block;
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}
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protected static function blockFencedCodeContinue(array $lineArray, array $block) /* : ?array */
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{
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if (isset($block['complete'])) {
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return;
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}
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if (isset($block['interrupted'])) {
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$block['element']['text']['text'] .= "\n";
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unset($block['interrupted']);
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}
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if (preg_match('/^' . $block['char'] . '{3,}[ ]*$/', $lineArray['text'])) {
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$block['element']['text']['text'] = substr($block['element']['text']['text'], 1);
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$block['complete'] = true;
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return $block;
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}
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$block['element']['text']['text'] .= "\n" . $lineArray['body'];
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return $block;
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}
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protected static function blockFencedCodeComplete(array $block) : array
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{
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$text = $block['element']['text']['text'];
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$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
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$block['element']['text']['text'] = $text;
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return $block;
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}
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protected static function blockHeader(array $lineArray) /* : ?array */
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{
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if (!isset($lineArray['text'][1])) {
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return;
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}
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$level = 1;
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while (isset($lineArray['text'][$level]) && $lineArray['text'][$level] === '#') {
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$level ++;
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}
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if ($level > 6) {
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return;
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}
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$text = trim($lineArray['text'], '# ');
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$block = [
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'element' => [
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'name' => 'h' . min(6, $level),
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'text' => $text,
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'handler' => 'line',
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],
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];
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return $block;
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}
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protected static function blockList(array $lineArray) /* : ?array */
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{
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list($name, $pattern) = $lineArray['text'][0] <= '-' ? ['ul', '[*+-]'] : ['ol', '[0-9]+[.]'];
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if (!preg_match('/^(' . $pattern . '[ ]+)(.*)/', $lineArray['text'], $matches)) {
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return;
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}
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$block = [
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'indent' => $lineArray['indent'],
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'pattern' => $pattern,
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'element' => [
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'name' => $name,
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'handler' => 'elements',
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],
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];
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if($name === 'ol') {
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$listStart = stristr($matches[0], '.', true);
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/*
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if($listStart !== '1') {
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$block['element']['attributes'] = ['start' => $listStart];
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}*/
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}
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$block['li'] = [
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'name' => 'li',
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'handler' => 'li',
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'text' => [
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$matches[2],
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],
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];
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$block['element']['text'][] = & $block['li'];
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return $block;
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}
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protected static function blockListContinue(array $lineArray, array $block) /* : ?array */
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{
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if ($block['indent'] === $lineArray['indent'] && preg_match('/^' . $block['pattern'] . '(?:[ ]+(.*)|$)/', $lineArray['text'], $matches)) {
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if (isset($block['interrupted'])) {
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$block['li']['text'][] = '';
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unset($block['interrupted']);
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}
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unset($block['li']);
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$text = isset($matches[1]) ? $matches[1] : '';
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$block['li'] = [
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'name' => 'li',
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'handler' => 'li',
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'text' => [
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$text,
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],
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];
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$block['element']['text'][] = & $block['li'];
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return $block;
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}
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if ($lineArray['text'][0] === '[' && self::blockReference($lineArray)) {
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return $block;
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}
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if (!isset($block['interrupted'])) {
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$text = preg_replace('/^[ ]{0,4}/', '', $lineArray['body']);
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$block['li']['text'][] = $text;
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return $block;
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}
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if ($lineArray['indent'] > 0) {
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$block['li']['text'][] = '';
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$text = preg_replace('/^[ ]{0,4}/', '', $lineArray['body']);
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$block['li']['text'][] = $text;
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unset($block['interrupted']);
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return $block;
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}
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}
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protected static function blockQuote(array $lineArray) /* : ?array */
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{
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if (!preg_match('/^>[ ]?(.*)/', $lineArray['text'], $matches)) {
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return;
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}
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$block = [
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'element' => [
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'name' => 'blockquote',
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'handler' => 'lines',
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'text' => (array) $matches[1],
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],
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];
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return $block;
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}
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protected static function blockQuoteContinue(array $lineArray, array $block) /* : ?array */
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{
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if ($lineArray['text'][0] === '>' && preg_match('/^>[ ]?(.*)/', $lineArray['text'], $matches)) {
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if (isset($block['interrupted'])) {
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$block['element']['text'][] = '';
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unset($block['interrupted']);
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}
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$block['element']['text'][] = $matches[1];
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return $block;
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}
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if (!isset($block['interrupted'])) {
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$block['element']['text'][] = $lineArray['text'];
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return $block;
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}
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}
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protected static function blockRule(array $lineArray) /* : ?array */
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{
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if (!preg_match('/^([' . $lineArray['text'][0] . '])([ ]*\1){2,}[ ]*$/', $lineArray['text'])) {
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return;
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}
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$block = [
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'element' => [
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'name' => 'hr'
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],
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];
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return $block;
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}
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protected static function blockSetextHeader(array $lineArray, array $block = null) /* : ?array */
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{
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if (!isset($block) || isset($block['type']) || isset($block['interrupted'])) {
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return;
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}
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if (chop($lineArray['text'], $lineArray['text'][0]) !== '') {
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return;
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}
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$block['element']['name'] = $lineArray['text'][0] === '=' ? 'h1' : 'h2';
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return $block;
|
|
}
|
|
|
|
protected static function blockMarkup(array $lineArray) /* : ?array */
|
|
{
|
|
if (!preg_match('/^<(\w[\w-]*)(?:[ ]*' . self::$regexHtmlAttribute . ')*[ ]*(\/)?>/', $lineArray['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
$element = strtolower($matches[1]);
|
|
|
|
if (in_array($element, self::$textLevelElements)) {
|
|
return;
|
|
}
|
|
|
|
$block = [
|
|
'name' => $matches[1],
|
|
'depth' => 0,
|
|
'markup' => $lineArray['text'],
|
|
];
|
|
|
|
$length = strlen($matches[0]);
|
|
$remainder = substr($lineArray['text'], $length);
|
|
|
|
if (trim($remainder) === '') {
|
|
if (isset($matches[2]) || in_array($matches[1], self::$voidElements)) {
|
|
$block['closed'] = true;
|
|
$block['void'] = true;
|
|
}
|
|
} else {
|
|
if (isset($matches[2]) || in_array($matches[1], self::$voidElements)) {
|
|
return;
|
|
}
|
|
|
|
if (preg_match('/<\/' . $matches[1] . '>[ ]*$/i', $remainder)) {
|
|
$block['closed'] = true;
|
|
}
|
|
}
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected static function blockMarkupContinue(array $lineArray, array $block) /* : ?array */
|
|
{
|
|
if (isset($block['closed'])) {
|
|
return;
|
|
}
|
|
|
|
if (preg_match('/^<' . $block['name'] . '(?:[ ]*' . self::$regexHtmlAttribute . ')*[ ]*>/i', $lineArray['text'])) {
|
|
$block['depth']++;
|
|
}
|
|
|
|
if (preg_match('/(.*?)<\/' . $block['name'] . '>[ ]*$/i', $lineArray['text'], $matches)) {
|
|
if ($block['depth'] > 0) {
|
|
$block['depth']--;
|
|
} else {
|
|
$block['closed'] = true;
|
|
}
|
|
}
|
|
|
|
if (isset($block['interrupted'])) {
|
|
$block['markup'] .= "\n";
|
|
|
|
unset($block['interrupted']);
|
|
}
|
|
|
|
$block['markup'] .= "\n".$lineArray['body'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected static function blockReference(array $lineArray) /* : ?array */
|
|
{
|
|
if (!preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $lineArray['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
$id = strtolower($matches[1]);
|
|
$Data = [
|
|
'url' => $matches[2],
|
|
'title' => null,
|
|
];
|
|
|
|
if (isset($matches[3])) {
|
|
$Data['title'] = $matches[3];
|
|
}
|
|
|
|
self::$definitionData['Reference'][$id] = $Data;
|
|
|
|
$block = ['hidden' => true];
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected static function blockTable($lineArray, array $block = null) /* : ?array */
|
|
{
|
|
if (!isset($block) || isset($block['type']) || isset($block['interrupted'])) {
|
|
return;
|
|
}
|
|
|
|
if (strpos($block['element']['text'], '|') !== false && chop($lineArray['text'], ' -:|') === '') {
|
|
$alignments = [];
|
|
$divider = $lineArray['text'];
|
|
$divider = trim($divider);
|
|
$divider = trim($divider, '|');
|
|
$dividerCells = explode('|', $divider);
|
|
|
|
foreach ($dividerCells as $dividerCell) {
|
|
$dividerCell = trim($dividerCell);
|
|
|
|
if ($dividerCell === '') {
|
|
continue;
|
|
}
|
|
|
|
$alignment = null;
|
|
|
|
if ($dividerCell[0] === ':') {
|
|
$alignment = 'left';
|
|
}
|
|
|
|
if (substr($dividerCell, - 1) === ':') {
|
|
$alignment = $alignment === 'left' ? 'center' : 'right';
|
|
}
|
|
|
|
$alignments[] = $alignment;
|
|
}
|
|
|
|
$HeaderElements = [];
|
|
$header = $block['element']['text'];
|
|
$header = trim($header);
|
|
$header = trim($header, '|');
|
|
$headerCells = explode('|', $header);
|
|
|
|
foreach ($headerCells as $index => $headerCell) {
|
|
$headerCell = trim($headerCell);
|
|
$HeaderElement = [
|
|
'name' => 'th',
|
|
'text' => $headerCell,
|
|
'handler' => 'line',
|
|
];
|
|
|
|
if (isset($alignments[$index])) {
|
|
$alignment = $alignments[$index];
|
|
$HeaderElement['attributes'] = [
|
|
'style' => 'text-align: ' . $alignment . ';',
|
|
];
|
|
}
|
|
|
|
$HeaderElements[] = $HeaderElement;
|
|
}
|
|
|
|
$block = [
|
|
'alignments' => $alignments,
|
|
'identified' => true,
|
|
'element' => [
|
|
'name' => 'table',
|
|
'handler' => 'elements',
|
|
],
|
|
];
|
|
|
|
$block['element']['text'][] = [
|
|
'name' => 'thead',
|
|
'handler' => 'elements',
|
|
];
|
|
|
|
$block['element']['text'][] = [
|
|
'name' => 'tbody',
|
|
'handler' => 'elements',
|
|
'text' => [],
|
|
];
|
|
|
|
$block['element']['text'][0]['text'][] = [
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $HeaderElements,
|
|
];
|
|
|
|
return $block;
|
|
}
|
|
}
|
|
|
|
protected static function blockTableContinue(array $lineArray, array $block) /* : ?array */
|
|
{
|
|
if (isset($block['interrupted'])) {
|
|
return;
|
|
}
|
|
|
|
if ($lineArray['text'][0] === '|' || strpos($lineArray['text'], '|')) {
|
|
$elements = [];
|
|
$row = $lineArray['text'];
|
|
$row = trim($row);
|
|
$row = trim($row, '|');
|
|
|
|
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
|
|
|
|
foreach ($matches[0] as $index => $cell) {
|
|
$cell = trim($cell);
|
|
$element = [
|
|
'name' => 'td',
|
|
'handler' => 'line',
|
|
'text' => $cell,
|
|
];
|
|
|
|
if (isset($block['alignments'][$index])) {
|
|
$element['attributes'] = [
|
|
'style' => 'text-align: ' . $block['alignments'][$index] . ';',
|
|
];
|
|
}
|
|
|
|
$elements[] = $element;
|
|
}
|
|
|
|
$element = [
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $elements,
|
|
];
|
|
$block['element']['text'][1]['text'][] = $element;
|
|
|
|
return $block;
|
|
}
|
|
}
|
|
|
|
protected static function paragraph(array $lineArray) : array
|
|
{
|
|
$block = [
|
|
'element' => [
|
|
'name' => 'p',
|
|
'text' => $lineArray['text'],
|
|
'handler' => 'line',
|
|
],
|
|
];
|
|
|
|
return $block;
|
|
}
|
|
|
|
public function line(string $text) : string
|
|
{
|
|
$markup = '';
|
|
|
|
while ($excerpt = strpbrk($text, self::$inlineMarkerList)) {
|
|
$marker = $excerpt[0];
|
|
$markerPosition = strpos($text, $marker);
|
|
$Excerpt = ['text' => $excerpt, 'context' => $text];
|
|
|
|
foreach (self::$inlineTypes[$marker] as $inlineType) {
|
|
$inline = self::{'inline' . $inlineType}($Excerpt);
|
|
|
|
if (!isset($inline)) {
|
|
continue;
|
|
}
|
|
|
|
if (isset($inline['position']) && $inline['position'] > $markerPosition) {
|
|
continue;
|
|
}
|
|
|
|
if (!isset($inline['position'])) {
|
|
$inline['position'] = $markerPosition;
|
|
}
|
|
|
|
$unmarkedText = substr($text, 0, $inline['position']);
|
|
$markup .= self::unmarkedText($unmarkedText);
|
|
$markup .= isset($inline['markup']) ? $inline['markup'] : self::element($inline['element']);
|
|
$text = substr($text, $inline['position'] + $inline['extent']);
|
|
|
|
continue 2;
|
|
}
|
|
|
|
$unmarkedText = substr($text, 0, $markerPosition + 1);
|
|
$markup .= self::unmarkedText($unmarkedText);
|
|
$text = substr($text, $markerPosition + 1);
|
|
}
|
|
|
|
$markup .= self::unmarkedText($text);
|
|
|
|
return $markup;
|
|
}
|
|
|
|
protected static function inlineCode(array $excerpt) /* : ?array */
|
|
{
|
|
$marker = $excerpt['text'][0];
|
|
|
|
if (!preg_match('/^(' . $marker . '+)[ ]*(.+?)[ ]*(?<!' . $marker . ')\1(?!' . $marker . ')/s', $excerpt['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
$text = $matches[2];
|
|
$text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
|
|
$text = preg_replace("/[ ]*\n/", ' ', $text);
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'code',
|
|
'text' => $text,
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function inlineEmailTag(array $excerpt) /* : ?array */
|
|
{
|
|
if (strpos($excerpt['text'], '>') === false || !preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $excerpt['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
$url = $matches[1];
|
|
|
|
if (!isset($matches[2])) {
|
|
$url = 'mailto:' . $url;
|
|
}
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $matches[1],
|
|
'attributes' => [
|
|
'href' => $url,
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function inlineEmphasis(array $excerpt) /* : ?array */
|
|
{
|
|
if (!isset($excerpt['text'][1])) {
|
|
return;
|
|
}
|
|
|
|
$marker = $excerpt['text'][0];
|
|
|
|
if ($excerpt['text'][1] === $marker && preg_match(self::$strongRegex[$marker], $excerpt['text'], $matches)) {
|
|
$emphasis = 'strong';
|
|
} elseif (preg_match(self::$emRegex[$marker], $excerpt['text'], $matches)) {
|
|
$emphasis = 'em';
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => $emphasis,
|
|
'handler' => 'line',
|
|
'text' => $matches[1],
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function inlineEscapeSequence(array $excerpt) /* : ?array */
|
|
{
|
|
if (!isset($excerpt['text'][1]) || !in_array($excerpt['text'][1], self::$specialCharacters)) {
|
|
return;
|
|
}
|
|
|
|
return [
|
|
'markup' => $excerpt['text'][1],
|
|
'extent' => 2,
|
|
];
|
|
}
|
|
|
|
protected static function inlineImage(array $excerpt) /* : ?array */
|
|
{
|
|
if (!isset($excerpt['text'][1]) || $excerpt['text'][1] !== '[') {
|
|
return;
|
|
}
|
|
|
|
$excerpt['text']= substr($excerpt['text'], 1);
|
|
$link = self::inlineLink($excerpt);
|
|
|
|
if (!isset($link)) {
|
|
return;
|
|
}
|
|
|
|
$inline = [
|
|
'extent' => $link['extent'] + 1,
|
|
'element' => [
|
|
'name' => 'img',
|
|
'attributes' => [
|
|
'src' => $link['element']['attributes']['href'],
|
|
'alt' => $link['element']['text'],
|
|
],
|
|
],
|
|
];
|
|
|
|
$inline['element']['attributes'] += $link['element']['attributes'];
|
|
|
|
unset($inline['element']['attributes']['href']);
|
|
|
|
return $inline;
|
|
}
|
|
|
|
protected static function inlineLink(array $excerpt) /* : ?array */
|
|
{
|
|
$element = [
|
|
'name' => 'a',
|
|
'handler' => 'line',
|
|
'text' => null,
|
|
'attributes' => [
|
|
'href' => null,
|
|
'title' => null,
|
|
],
|
|
];
|
|
$extent = 0;
|
|
$remainder = $excerpt['text'];
|
|
|
|
if (!preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches)) {
|
|
return;
|
|
}
|
|
|
|
$element['text'] = $matches[1];
|
|
$extent += strlen($matches[0]);
|
|
$remainder = substr($remainder, $extent);
|
|
|
|
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $remainder, $matches)) {
|
|
$element['attributes']['href'] = $matches[1];
|
|
|
|
if (isset($matches[2])) {
|
|
$element['attributes']['title'] = substr($matches[2], 1, - 1);
|
|
}
|
|
|
|
$extent += strlen($matches[0]);
|
|
} else {
|
|
if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches)) {
|
|
$definition = strlen($matches[1]) ? $matches[1] : $element['text'];
|
|
$definition = strtolower($definition);
|
|
$extent += strlen($matches[0]);
|
|
} else {
|
|
$definition = strtolower($element['text']);
|
|
}
|
|
|
|
if (!isset(self::$definitionData['Reference'][$definition])) {
|
|
return;
|
|
}
|
|
|
|
$def = self::$definitionData['Reference'][$definition];
|
|
$element['attributes']['href'] = $def['url'];
|
|
$element['attributes']['title'] = $def['title'];
|
|
}
|
|
|
|
$element['attributes']['href'] = str_replace(['&', '<'], ['&', '<'], $element['attributes']['href']);
|
|
|
|
return [
|
|
'extent' => $extent,
|
|
'element' => $element,
|
|
];
|
|
}
|
|
|
|
protected static function inlineMarkup(array $excerpt) /* : ?array */
|
|
{
|
|
if (strpos($excerpt['text'], '>') === false) {
|
|
return;
|
|
}
|
|
|
|
if ($excerpt['text'][1] === '/' && preg_match('/^<\/\w[\w-]*[ ]*>/s', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
|
|
if ($excerpt['text'][1] === '!' && preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
|
|
if ($excerpt['text'][1] !== ' ' && preg_match('/^<\w[\w-]*(?:[ ]*' . self::$regexHtmlAttribute . ')*[ ]*\/?>/s', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
}
|
|
|
|
protected static function inlineSpecialCharacter(array $excerpt) /* : ?array */
|
|
{
|
|
if ($excerpt['text'][0] === '&' && ! preg_match('/^&#?\w+;/', $excerpt['text'])) {
|
|
return [
|
|
'markup' => '&',
|
|
'extent' => 1,
|
|
];
|
|
}
|
|
|
|
$specialChar = ['>' => 'gt', '<' => 'lt', '"' => 'quot'];
|
|
|
|
if (isset($specialChar[$excerpt['text'][0]])) {
|
|
return [
|
|
'markup' => '&' . $specialChar[$excerpt['text'][0]] . ';',
|
|
'extent' => 1,
|
|
];
|
|
}
|
|
}
|
|
|
|
protected static function inlineStrikethrough(array $excerpt) /* : ?array */
|
|
{
|
|
if (!isset($excerpt['text'][1])) {
|
|
return;
|
|
}
|
|
|
|
if ($excerpt['text'][1] !== '~' || !preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $excerpt['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'del',
|
|
'text' => $matches[1],
|
|
'handler' => 'line',
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function inlineUrl(array $excerpt) /* : ?array */
|
|
{
|
|
if (!isset($excerpt['text'][2]) || $excerpt['text'][2] !== '/') {
|
|
return;
|
|
}
|
|
|
|
if (!preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $excerpt['context'], $matches, PREG_OFFSET_CAPTURE)) {
|
|
return;
|
|
}
|
|
|
|
return [
|
|
'extent' => strlen($matches[0][0]),
|
|
'position' => $matches[0][1],
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $matches[0][0],
|
|
'attributes' => [
|
|
'href' => $matches[0][0],
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function inlineUrlTag(array $excerpt) /* : ?array */
|
|
{
|
|
if (strpos($excerpt['text'], '>') === false || !preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $excerpt['text'], $matches)) {
|
|
return;
|
|
}
|
|
|
|
$url = str_replace(['&', '<'], ['&', '<'], $matches[1]);
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $url,
|
|
'attributes' => [
|
|
'href' => $url,
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
protected static function unmarkedText(string $text) : string
|
|
{
|
|
$text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text);
|
|
$text = str_replace(" \n", "\n", $text);
|
|
|
|
return $text;
|
|
}
|
|
|
|
protected static function element(array $element) : string
|
|
{
|
|
$markup = '<' . $element['name'];
|
|
|
|
if (isset($element['attributes'])) {
|
|
foreach ($element['attributes'] as $name => $value) {
|
|
if ($value === null) {
|
|
continue;
|
|
}
|
|
|
|
$markup .= ' ' . $name . '="' . $value . '"';
|
|
}
|
|
}
|
|
|
|
if (isset($element['text'])) {
|
|
$markup .= '>';
|
|
$markup .= isset($element['handler']) ? self::{$element['handler']}($element['text']) : $element['text'];
|
|
$markup .= '</' . $element['name'] . '>';
|
|
} else {
|
|
$markup .= ' />';
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
|
|
protected static function elements(array $elements) : string
|
|
{
|
|
$markup = '';
|
|
|
|
foreach ($elements as $element) {
|
|
$markup .= "\n" . self::element($element);
|
|
}
|
|
|
|
$markup .= "\n";
|
|
|
|
return $markup;
|
|
}
|
|
|
|
protected static function li($lines) : string
|
|
{
|
|
$markup = self::lines($lines);
|
|
$trimmedMarkup = trim($markup);
|
|
|
|
if (!in_array('', $lines) && substr($trimmedMarkup, 0, 3) === '<p>') {
|
|
$markup = $trimmedMarkup;
|
|
$markup = substr($markup, 3);
|
|
$position = strpos($markup, "</p>");
|
|
$markup = substr_replace($markup, '', $position, 4);
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
} |