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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\Shared;
use PhpOffice\PhpWord\Exception\Exception;
/**
* XML Reader wrapper
*
* @since 0.10.0
*/
class XMLReader
{
/**
* DOMDocument object
*
* @var \DOMDocument
*/
private $dom = null;
/**
* DOMXpath object
*
* @var \DOMXpath
*/
private $xpath = null;
/**
* Get DOMDocument from ZipArchive
*
* @param string $zipFile
* @param string $xmlFile
* @return \DOMDocument|false
* @throws \PhpOffice\PhpWord\Exception\Exception
*/
public function getDomFromZip($zipFile, $xmlFile)
{
if (file_exists($zipFile) === false) {
throw new Exception('Cannot find archive file.');
}
$zip = new ZipArchive();
$zip->open($zipFile);
$content = $zip->getFromName($xmlFile);
$zip->close();
if ($content === false) {
return false;
} else {
return $this->getDomFromString($content);
}
}
/**
* Get DOMDocument from content string
*
* @param string $content
* @return \DOMDocument
*/
public function getDomFromString($content)
{
$this->dom = new \DOMDocument();
$this->dom->loadXML($content);
return $this->dom;
}
/**
* Get elements
*
* @param string $path
* @param \DOMElement $contextNode
* @return \DOMNodeList
*/
public function getElements($path, \DOMElement $contextNode = null)
{
if ($this->dom === null) {
return array();
}
if ($this->xpath === null) {
$this->xpath = new \DOMXpath($this->dom);
}
if (is_null($contextNode)) {
return $this->xpath->query($path);
} else {
return $this->xpath->query($path, $contextNode);
}
}
/**
* Get element
*
* @param string $path
* @param \DOMElement $contextNode
* @return \DOMElement|null
*/
public function getElement($path, \DOMElement $contextNode = null)
{
$elements = $this->getElements($path, $contextNode);
if ($elements->length > 0) {
return $elements->item(0);
} else {
return null;
}
}
/**
* Get element attribute
*
* @param string $attribute
* @param \DOMElement $contextNode
* @param string $path
* @return string|null
*/
public function getAttribute($attribute, \DOMElement $contextNode = null, $path = null)
{
$return = null;
if ($path !== null) {
$elements = $this->getElements($path, $contextNode);
if ($elements->length > 0) {
/** @var \DOMElement $node Type hint */
$node = $elements->item(0);
$return = $node->getAttribute($attribute);
}
} else {
if ($contextNode !== null) {
$return = $contextNode->getAttribute($attribute);
}
}
return ($return == '') ? null : $return;
}
/**
* Get element value
*
* @param string $path
* @param \DOMElement $contextNode
* @return string|null
*/
public function getValue($path, \DOMElement $contextNode = null)
{
$elements = $this->getElements($path, $contextNode);
if ($elements->length > 0) {
return $elements->item(0)->nodeValue;
} else {
return null;
}
}
/**
* Count elements
*
* @param string $path
* @param \DOMElement $contextNode
* @return integer
*/
public function countElements($path, \DOMElement $contextNode = null)
{
$elements = $this->getElements($path, $contextNode);
return $elements->length;
}
/**
* Element exists
*
* @param string $path
* @param \DOMElement $contextNode
* @return boolean
*/
public function elementExists($path, \DOMElement $contextNode = null)
{
return $this->getElements($path, $contextNode)->length > 0;
}
}