69 lines
2.1 KiB
PHP
69 lines
2.1 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\CssSelector\XPath\Extension;
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use Symfony\Component\CssSelector\XPath\XPathExpr;
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/**
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* XPath expression translator combination extension.
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*
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* This component is a port of the Python cssselect library,
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* which is copyright Ian Bicking, @see https://github.com/scrapy/cssselect.
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*
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* @author Franck Ranaivo-Harisoa <franckranaivo@gmail.com>
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*
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* @internal
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*/
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class RelationExtension extends AbstractExtension
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{
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public function getRelativeCombinationTranslators(): array
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{
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return [
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' ' => $this->translateRelationDescendant(...),
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'>' => $this->translateRelationChild(...),
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'+' => $this->translateRelationDirectAdjacent(...),
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'~' => $this->translateRelationIndirectAdjacent(...),
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];
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}
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public function translateRelationDescendant(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
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{
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return $xpath->join('[descendant-or-self::', $combinedXpath, ']', true);
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}
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public function translateRelationChild(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
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{
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return $xpath->join('[./', $combinedXpath, ']', true);
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}
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public function translateRelationDirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
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{
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// position() = 1 must apply to the sibling, not the outer element, so it goes on $combinedXpath before the join
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$combinedXpath
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->addNameTest()
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->addCondition('position() = 1');
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return $xpath
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->join('[following-sibling::', $combinedXpath, ']', true);
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}
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public function translateRelationIndirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
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{
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return $xpath->join('[following-sibling::', $combinedXpath, ']', true);
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}
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public function getName(): string
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{
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return 'relation';
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}
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}
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