Viewing file:  XPath.php (1.61 KB) -rw-rw-rw-
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<?php
namespace enshrined\svgSanitize\data;
class XPath extends \DOMXPath
{
const DEFAULT_NAMESPACE_PREFIX = 'svg';
/**
* @var string
*/
protected $defaultNamespaceURI;
public function __construct(\DOMDocument $doc)
{
parent::__construct($doc);
$this->handleDefaultNamespace();
}
/**
* @param string $nodeName
* @return string
*/
public function createNodeName($nodeName)
{
if (empty($this->defaultNamespaceURI)) {
return $nodeName;
}
return self::DEFAULT_NAMESPACE_PREFIX . ':' . $nodeName;
}
protected function handleDefaultNamespace()
{
$rootElements = $this->getRootElements();
if (count($rootElements) !== 1) {
throw new \LogicException(
sprintf('Got %d svg elements, expected exactly one', count($rootElements)),
1570870568
);
}
$this->defaultNamespaceURI = (string)$rootElements[0]->namespaceURI;
if ($this->defaultNamespaceURI !== '') {
$this->registerNamespace(self::DEFAULT_NAMESPACE_PREFIX, $this->defaultNamespaceURI);
}
}
/**
* @return \DOMElement[]
*/
protected function getRootElements()
{
$rootElements = [];
$elements = $this->document->getElementsByTagName('svg');
/** @var \DOMElement $element */
foreach ($elements as $element) {
if ($element->parentNode !== $this->document) {
continue;
}
$rootElements[] = $element;
}
return $rootElements;
}
}
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