<?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 WPForms\Vendor\Symfony\Component\CssSelector\XPath;

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use WPForms\Vendor\Symfony\Component\CssSelector\Exception\ExpressionErrorException;

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use WPForms\Vendor\Symfony\Component\CssSelector\Node\FunctionNode;

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use WPForms\Vendor\Symfony\Component\CssSelector\Node\NodeInterface;

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use WPForms\Vendor\Symfony\Component\CssSelector\Node\SelectorNode;

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use WPForms\Vendor\Symfony\Component\CssSelector\Parser\Parser;

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use WPForms\Vendor\Symfony\Component\CssSelector\Parser\ParserInterface;

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/**

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* XPath expression translator interface.

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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/SimonSapin/cssselect.

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*

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* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>

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*

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* @internal

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*/

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class Translator implements TranslatorInterface

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{

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/**

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* @var ParserInterface

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*/

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private $mainParser;

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/**

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* @var ParserInterface[]

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*/

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private $shortcutParsers = array();

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/**

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* @var Extension\ExtensionInterface

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*/

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private $extensions = array();

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/**

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* @var array

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*/

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private $nodeTranslators = array();

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/**

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* @var array

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*/

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private $combinationTranslators = array();

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/**

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* @var array

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*/

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private $functionTranslators = array();

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/**

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* @var array

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*/

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private $pseudoClassTranslators = array();

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/**

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* @var array

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*/

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private $attributeMatchingTranslators = array();

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public function __construct(ParserInterface $parser = null)

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{

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$this->mainParser = $parser ?: new Parser();

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$this->registerExtension(new Extension\NodeExtension())->registerExtension(new Extension\CombinationExtension())->registerExtension(new Extension\FunctionExtension())->registerExtension(new Extension\PseudoClassExtension())->registerExtension(new Extension\AttributeMatchingExtension());

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}

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/**

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* @param string $element

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*

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* @return string

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*/

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public static function getXpathLiteral($element)

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{

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if (\false === \strpos($element, "'")) {

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return "'" . $element . "'";

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}

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if (\false === \strpos($element, '"')) {

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return '"' . $element . '"';

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}

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$string = $element;

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$parts = array();

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while (\true) {

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if (\false !== ($pos = \strpos($string, "'"))) {

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$parts[] = \sprintf("'%s'", \substr($string, 0, $pos));

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$parts[] = "\"'\"";

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$string = \substr($string, $pos + 1);

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} else {

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$parts[] = "'{$string}'";

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break;

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}

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}

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return \sprintf('concat(%s)', \implode($parts, ', '));

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}

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/**

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* {@inheritdoc}

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*/

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public function cssToXPath($cssExpr, $prefix = 'descendant-or-self::')

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{

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$selectors = $this->parseSelectors($cssExpr);

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/** @var SelectorNode $selector */

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foreach ($selectors as $index => $selector) {

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if (null !== $selector->getPseudoElement()) {

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throw new ExpressionErrorException('Pseudo-elements are not supported.');

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}

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$selectors[$index] = $this->selectorToXPath($selector, $prefix);

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}

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return \implode(' | ', $selectors);

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}

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/**

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* {@inheritdoc}

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*/

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public function selectorToXPath(SelectorNode $selector, $prefix = 'descendant-or-self::')

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{

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return ($prefix ?: '') . $this->nodeToXPath($selector);

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}

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/**

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* Registers an extension.

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*

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* @param Extension\ExtensionInterface $extension

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*

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* @return $this

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*/

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public function registerExtension(Extension\ExtensionInterface $extension)

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{

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$this->extensions[$extension->getName()] = $extension;

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$this->nodeTranslators = \array_merge($this->nodeTranslators, $extension->getNodeTranslators());

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$this->combinationTranslators = \array_merge($this->combinationTranslators, $extension->getCombinationTranslators());

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$this->functionTranslators = \array_merge($this->functionTranslators, $extension->getFunctionTranslators());

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$this->pseudoClassTranslators = \array_merge($this->pseudoClassTranslators, $extension->getPseudoClassTranslators());

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$this->attributeMatchingTranslators = \array_merge($this->attributeMatchingTranslators, $extension->getAttributeMatchingTranslators());

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return $this;

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}

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/**

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* @param string $name

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*

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* @return Extension\ExtensionInterface

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*

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* @throws ExpressionErrorException

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*/

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public function getExtension($name)

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{

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if (!isset($this->extensions[$name])) {

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throw new ExpressionErrorException(\sprintf('Extension "%s" not registered.', $name));

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}

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return $this->extensions[$name];

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}

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/**

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* Registers a shortcut parser.

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*

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* @param ParserInterface $shortcut

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*

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* @return $this

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*/

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public function registerParserShortcut(ParserInterface $shortcut)

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{

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$this->shortcutParsers[] = $shortcut;

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return $this;

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}

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/**

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* @param NodeInterface $node

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*

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* @return XPathExpr

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*

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* @throws ExpressionErrorException

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*/

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public function nodeToXPath(NodeInterface $node)

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{

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if (!isset($this->nodeTranslators[$node->getNodeName()])) {

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throw new ExpressionErrorException(\sprintf('Node "%s" not supported.', $node->getNodeName()));

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}

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return \call_user_func($this->nodeTranslators[$node->getNodeName()], $node, $this);

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}

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/**

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* @param string $combiner

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* @param NodeInterface $xpath

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* @param NodeInterface $combinedXpath

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*

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* @return XPathExpr

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*

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* @throws ExpressionErrorException

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*/

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public function addCombination($combiner, NodeInterface $xpath, NodeInterface $combinedXpath)

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{

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if (!isset($this->combinationTranslators[$combiner])) {

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throw new ExpressionErrorException(\sprintf('Combiner "%s" not supported.', $combiner));

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}

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return \call_user_func($this->combinationTranslators[$combiner], $this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));

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}

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/**

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* @param XPathExpr $xpath

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* @param FunctionNode $function

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*

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* @return XPathExpr

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*

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* @throws ExpressionErrorException

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*/

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public function addFunction(XPathExpr $xpath, FunctionNode $function)

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{

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if (!isset($this->functionTranslators[$function->getName()])) {

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throw new ExpressionErrorException(\sprintf('Function "%s" not supported.', $function->getName()));

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}

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return \call_user_func($this->functionTranslators[$function->getName()], $xpath, $function);

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}

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/**

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* @param XPathExpr $xpath

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* @param string $pseudoClass

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*

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* @return XPathExpr

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*

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* @throws ExpressionErrorException

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*/

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public function addPseudoClass(XPathExpr $xpath, $pseudoClass)

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{

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if (!isset($this->pseudoClassTranslators[$pseudoClass])) {

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throw new ExpressionErrorException(\sprintf('Pseudo-class "%s" not supported.', $pseudoClass));

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}

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return \call_user_func($this->pseudoClassTranslators[$pseudoClass], $xpath);

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}

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/**

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* @param XPathExpr $xpath

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* @param string $operator

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* @param string $attribute

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* @param string $value

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*

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* @return XPathExpr

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*

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* @throws ExpressionErrorException

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*/

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public function addAttributeMatching(XPathExpr $xpath, $operator, $attribute, $value)

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{

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if (!isset($this->attributeMatchingTranslators[$operator])) {

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throw new ExpressionErrorException(\sprintf('Attribute matcher operator "%s" not supported.', $operator));

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}

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return \call_user_func($this->attributeMatchingTranslators[$operator], $xpath, $attribute, $value);

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}

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/**

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* @param string $css

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*

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* @return SelectorNode[]

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*/

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private function parseSelectors($css)

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{

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foreach ($this->shortcutParsers as $shortcut) {

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$tokens = $shortcut->parse($css);

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if (!empty($tokens)) {

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return $tokens;

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}

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}

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return $this->mainParser->parse($css);

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}

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}

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