<?php
/**
 * This file is part of PHPPresentation - A pure PHP library for reading and writing
 * presentations documents.
 *
 * PHPPresentation is free software distributed under the terms of the GNU Lesser
 * General Public License version 3 as published by the Free Software Foundation.
 *
 * For the full copyright and license information, please read the LICENSE
 * file that was distributed with this source code. For the full list of
 * contributors, visit https://github.com/PHPOffice/PHPPresentation/contributors.
 *
 * @see        https://github.com/PHPOffice/PHPPresentation
 *
 * @copyright   2009-2015 PHPPresentation contributors
 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
 */

declare(strict_types=1);

namespace PhpOffice\PhpPresentation\Writer\PowerPoint2007;

use PhpOffice\Common\Adapter\Zip\ZipInterface;
use PhpOffice\Common\XMLWriter;

class PptViewProps extends AbstractDecoratorWriter
{
    /**
     * @return ZipInterface
     */
    public function render(): ZipInterface
    {
        // Create XML writer
        $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // p:viewPr
        $objWriter->startElement('p:viewPr');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
        $objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
        $objWriter->writeAttribute('xmlns:p', 'http://schemas.openxmlformats.org/presentationml/2006/main');
        $objWriter->writeAttribute('showComments', $this->getPresentation()->getPresentationProperties()->isCommentVisible() ? 1 : 0);
        $objWriter->writeAttribute('lastView', $this->getPresentation()->getPresentationProperties()->getLastView());

        // p:viewPr > p:slideViewPr
        $objWriter->startElement('p:slideViewPr');

        // p:viewPr > p:slideViewPr > p:cSldViewPr
        $objWriter->startElement('p:cSldViewPr');

        // p:viewPr > p:slideViewPr > p:cSldViewPr > p:cViewPr
        $objWriter->startElement('p:cViewPr');

        // p:viewPr > p:slideViewPr > p:cSldViewPr > p:cViewPr > p:scale
        $objWriter->startElement('p:scale');

        $objWriter->startElement('a:sx');
        $objWriter->writeAttribute('d', '100');
        $objWriter->writeAttribute('n', (int) ($this->getPresentation()->getPresentationProperties()->getZoom() * 100));
        $objWriter->endElement();

        $objWriter->startElement('a:sy');
        $objWriter->writeAttribute('d', '100');
        $objWriter->writeAttribute('n', (int) ($this->getPresentation()->getPresentationProperties()->getZoom() * 100));
        $objWriter->endElement();

        // > // p:viewPr > p:slideViewPr > p:cSldViewPr > p:cViewPr > p:scale
        $objWriter->endElement();

        $objWriter->startElement('p:origin');
        $objWriter->writeAttribute('x', '0');
        $objWriter->writeAttribute('y', '0');
        $objWriter->endElement();

        // > // p:viewPr > p:slideViewPr > p:cSldViewPr > p:cViewPr
        $objWriter->endElement();

        // > // p:viewPr > p:slideViewPr > p:cSldViewPr
        $objWriter->endElement();

        // > // p:viewPr > p:slideViewPr
        $objWriter->endElement();

        // > // p:viewPr
        $objWriter->endElement();

        $this->getZip()->addFromString('ppt/viewProps.xml', $objWriter->getData());

        return $this->getZip();
    }
}