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<?php
/**
* This file is part of PHPWord - A pure PHP library for reading and writing
* word processing documents.
*
* PHPWord 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/PHPWord/contributors.
*
* @link https://github.com/PHPOffice/PHPWord
* @copyright 2010-2014 PHPWord contributors
* @license http://www.gnu.org/licenses/lgpl.txt LGPL version 3
*/
namespace PhpOffice\PhpWord\Writer\Word2007\Part;
use PhpOffice\PhpWord\Exception\Exception;
use PhpOffice\PhpWord\Shared\XMLWriter;
/**
* Word2007 main relationship writer: _rels/.rels
*
* @since 0.10.0
*/
class Rels extends AbstractPart
{
/**
* Write part
*
* @return string
*/
public function write()
{
$xmlRels = array(
'docProps/core.xml' => 'package/2006/relationships/metadata/core-properties',
'docProps/app.xml' => 'officeDocument/2006/relationships/extended-properties',
'docProps/custom.xml' => 'officeDocument/2006/relationships/custom-properties',
'word/document.xml' => 'officeDocument/2006/relationships/officeDocument',
);
$xmlWriter = $this->getXmlWriter();
$this->writeRels($xmlWriter, $xmlRels);
return $xmlWriter->getData();
}
/**
* Write relationships.
*
* @param \PhpOffice\PhpWord\Shared\XMLWriter $xmlWriter
* @param array $xmlRels
* @param array $mediaRels
* @param int $relId
* @return void
*/
protected function writeRels(XMLWriter $xmlWriter, $xmlRels = array(), $mediaRels = array(), $relId = 1)
{
$xmlWriter->startDocument('1.0', 'UTF-8', 'yes');
$xmlWriter->startElement('Relationships');
$xmlWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
// XML files relationships
foreach ($xmlRels as $target => $type) {
$this->writeRel($xmlWriter, $relId++, $type, $target);
}
// Media relationships
foreach ($mediaRels as $mediaRel) {
$this->writeMediaRel($xmlWriter, $relId++, $mediaRel);
}
$xmlWriter->endElement(); // Relationships
}
/**
* Write media relationships.
*
* @param \PhpOffice\PhpWord\Shared\XMLWriter $xmlWriter
* @param int $relId
* @param array $mediaRel
* @return void
*/
private function writeMediaRel(XMLWriter $xmlWriter, $relId, $mediaRel)
{
$typePrefix = 'officeDocument/2006/relationships/';
$typeMapping = array('image' => 'image', 'object' => 'oleObject', 'link' => 'hyperlink');
$targetMapping = array('image' => 'media/', 'object' => 'embeddings/');
$mediaType = $mediaRel['type'];
$type = isset($typeMapping[$mediaType]) ? $typeMapping[$mediaType] : $mediaType;
$targetPrefix = isset($targetMapping[$mediaType]) ? $targetMapping[$mediaType] : '';
$target = $mediaRel['target'];
$targetMode = ($type == 'hyperlink') ? 'External' : '';
$this->writeRel($xmlWriter, $relId, $typePrefix . $type, $targetPrefix . $target, $targetMode);
}
/**
* Write individual rels entry.
*
* Format:
* <Relationship Id="rId..." Type="http://..." Target="....xml" TargetMode="..." />
*
* @param \PhpOffice\PhpWord\Shared\XMLWriter $xmlWriter
* @param int $relId Relationship ID
* @param string $type Relationship type
* @param string $target Relationship target
* @param string $targetMode Relationship target mode
* @return void
* @throws \PhpOffice\PhpWord\Exception\Exception
*/
private function writeRel(XMLWriter $xmlWriter, $relId, $type, $target, $targetMode = '')
{
if ($type != '' && $target != '') {
if (strpos($relId, 'rId') === false) {
$relId = 'rId' . $relId;
}
$xmlWriter->startElement('Relationship');
$xmlWriter->writeAttribute('Id', $relId);
$xmlWriter->writeAttribute('Type', 'http://schemas.openxmlformats.org/' . $type);
$xmlWriter->writeAttribute('Target', $target);
if ($targetMode != '') {
$xmlWriter->writeAttribute('TargetMode', $targetMode);
}
$xmlWriter->endElement();
} else {
throw new Exception("Invalid parameters passed.");
}
}
}