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vendor/symfony/css-selector/XPath/Extension/CombinationExtension.php

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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 cssselect library,
+ * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ *
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ *
+ * @internal
+ */
+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';
+    }
+}