Viewing file:  CombinationExtension.php (2.31 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\CssSelector\XPath\Extension;
use Symfony\Component\CssSelector\XPath\XPathExpr;
/**
* XPath expression translator combination extension.
*
* This component is a port of the Python cssselector library,
* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
*
* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
*/
class CombinationExtension extends AbstractExtension
{
/**
* {@inheritdoc}
*/
public function getCombinationTranslators()
{
return array(
' ' => array($this, 'translateDescendant'),
'>' => array($this, 'translateChild'),
'+' => array($this, 'translateDirectAdjacent'),
'~' => array($this, 'translateIndirectAdjacent'),
);
}
/**
* @param XPathExpr $xpath
* @param XPathExpr $combinedXpath
*
* @return XPathExpr
*/
public function translateDescendant(XPathExpr $xpath, XPathExpr $combinedXpath)
{
return $xpath->join('/descendant-or-self::*/', $combinedXpath);
}
/**
* @param XPathExpr $xpath
* @param XPathExpr $combinedXpath
*
* @return XPathExpr
*/
public function translateChild(XPathExpr $xpath, XPathExpr $combinedXpath)
{
return $xpath->join('/', $combinedXpath);
}
/**
* @param XPathExpr $xpath
* @param XPathExpr $combinedXpath
*
* @return XPathExpr
*/
public function translateDirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath)
{
return $xpath
->join('/following-sibling::', $combinedXpath)
->addNameTest()
->addCondition('position() = 1');
}
/**
* @param XPathExpr $xpath
* @param XPathExpr $combinedXpath
*
* @return XPathExpr
*/
public function translateIndirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath)
{
return $xpath->join('/following-sibling::', $combinedXpath);
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'combination';
}
}
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