[CssSelector] Add has relation support

symfony · franckranaivo · Feb 15, 2023 · Feb 15, 2023 · Feb 20, 2023 · Feb 20, 2023
commit 18ad9bbfca8892a55682ad793a34aaf12b204d4e
diff --git a/src/Symfony/Component/CssSelector/Exception/SyntaxErrorException.php b/src/Symfony/Component/CssSelector/Exception/SyntaxErrorException.php
@@ -17,7 +17,7 @@
  * ParseException is thrown when a CSS selector syntax is not valid.
  *
  * This component is a port of the Python cssselect library,
- * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ * which is copyright Ian Bicking, @see https://github.com/scrapy/cssselect.
  *
  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  */
@@ -48,6 +48,11 @@ public static function notAtTheStartOfASelector(string $pseudoElement): self
         return new self(\sprintf('Got immediate child pseudo-element ":%s" not at the start of a selector', $pseudoElement));
     }
 
+    public static function nestedHas(): self
+    {
+        return new self('Got nested :has().');
+    }
+
     public static function stringAsFunctionArgument(): self
     {
         return new self('String not allowed as function argument.');

diff --git a/src/Symfony/Component/CssSelector/Node/RelationNode.php b/src/Symfony/Component/CssSelector/Node/RelationNode.php
@@ -0,0 +1,54 @@
+<?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\Node;
+
+/**
+ * Represents a "<selector>:has(<identifier>)" node.
+ *
+ * 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 RelationNode extends AbstractNode
+{
+    private NodeInterface $selector;
+    private NodeInterface $subSelector;
+
+    public function __construct(NodeInterface $selector, NodeInterface $subSelector)
+    {
+        $this->selector = $selector;
+        $this->subSelector = $subSelector;
+    }
+
+    public function getSelector(): NodeInterface
+    {
+        return $this->selector;
+    }
+
+    public function getSubSelector(): NodeInterface
+    {
+        return $this->subSelector;
+    }
+
+    public function getSpecificity(): Specificity
+    {
+        return $this->selector->getSpecificity()->plus($this->subSelector->getSpecificity());
+    }
+
+    public function __toString(): string
+    {
+        return sprintf('%s[%s:has(%s)]', $this->getNodeName(), $this->selector, $this->subSelector);
+    }
+}
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php
@@ -71,6 +71,7 @@ public function getNodeTranslators(): array
             'Class' => $this->translateClass(...),
             'Hash' => $this->translateHash(...),
             'Element' => $this->translateElement(...),
+            'Relation' => $this->translateRelation(...)
         ];
     }
 
@@ -209,6 +210,19 @@ public function translateElement(Node\ElementNode $node): XPathExpr
         return $xpath;
     }
 
+    public function translateRelation(Node\RelationNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+        $subXpath = $translator->nodeToXPath($node->getSubSelector());
+        $subXpath->addNameTest();
+
+        if ($subXpath->getCondition()) {
+            return $xpath->addCondition(sprintf('count(descendant-or-self::*[%s]) > 0', $subXpath->getCondition()));
+        }
+
+        return $xpath->addCondition('0');
+    }
+
     public function getName(): string
     {
         return 'node';