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vendor/symfony/css-selector/XPath/Extension/AbstractExtension.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;
+
+/**
+ * XPath expression translator abstract 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
+ */
+abstract class AbstractExtension implements ExtensionInterface
+{
+    public function getNodeTranslators(): array
+    {
+        return [];
+    }
+
+    public function getCombinationTranslators(): array
+    {
+        return [];
+    }
+
+    public function getFunctionTranslators(): array
+    {
+        return [];
+    }
+
+    public function getPseudoClassTranslators(): array
+    {
+        return [];
+    }
+
+    public function getAttributeMatchingTranslators(): array
+    {
+        return [];
+    }
+}

vendor/symfony/css-selector/XPath/Extension/AttributeMatchingExtension.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\Translator;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator attribute 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 AttributeMatchingExtension extends AbstractExtension
+{
+    public function getAttributeMatchingTranslators(): array
+    {
+        return [
+            'exists' => $this->translateExists(...),
+            '=' => $this->translateEquals(...),
+            '~=' => $this->translateIncludes(...),
+            '|=' => $this->translateDashMatch(...),
+            '^=' => $this->translatePrefixMatch(...),
+            '$=' => $this->translateSuffixMatch(...),
+            '*=' => $this->translateSubstringMatch(...),
+            '!=' => $this->translateDifferent(...),
+        ];
+    }
+
+    public function translateExists(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition($attribute);
+    }
+
+    public function translateEquals(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition(sprintf('%s = %s', $attribute, Translator::getXpathLiteral($value)));
+    }
+
+    public function translateIncludes(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition($value ? sprintf(
+            '%1$s and contains(concat(\' \', normalize-space(%1$s), \' \'), %2$s)',
+            $attribute,
+            Translator::getXpathLiteral(' '.$value.' ')
+        ) : '0');
+    }
+
+    public function translateDashMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition(sprintf(
+            '%1$s and (%1$s = %2$s or starts-with(%1$s, %3$s))',
+            $attribute,
+            Translator::getXpathLiteral($value),
+            Translator::getXpathLiteral($value.'-')
+        ));
+    }
+
+    public function translatePrefixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition($value ? sprintf(
+            '%1$s and starts-with(%1$s, %2$s)',
+            $attribute,
+            Translator::getXpathLiteral($value)
+        ) : '0');
+    }
+
+    public function translateSuffixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition($value ? sprintf(
+            '%1$s and substring(%1$s, string-length(%1$s)-%2$s) = %3$s',
+            $attribute,
+            \strlen($value) - 1,
+            Translator::getXpathLiteral($value)
+        ) : '0');
+    }
+
+    public function translateSubstringMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition($value ? sprintf(
+            '%1$s and contains(%1$s, %2$s)',
+            $attribute,
+            Translator::getXpathLiteral($value)
+        ) : '0');
+    }
+
+    public function translateDifferent(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
+    {
+        return $xpath->addCondition(sprintf(
+            $value ? 'not(%1$s) or %1$s != %2$s' : '%s != %s',
+            $attribute,
+            Translator::getXpathLiteral($value)
+        ));
+    }
+
+    public function getName(): string
+    {
+        return 'attribute-matching';
+    }
+}

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
+{
+    public function getCombinationTranslators(): array
+    {
+        return [
+            ' ' => $this->translateDescendant(...),
+            '>' => $this->translateChild(...),
+            '+' => $this->translateDirectAdjacent(...),
+            '~' => $this->translateIndirectAdjacent(...),
+        ];
+    }
+
+    public function translateDescendant(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
+    {
+        return $xpath->join('/descendant-or-self::*/', $combinedXpath);
+    }
+
+    public function translateChild(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
+    {
+        return $xpath->join('/', $combinedXpath);
+    }
+
+    public function translateDirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
+    {
+        return $xpath
+            ->join('/following-sibling::', $combinedXpath)
+            ->addNameTest()
+            ->addCondition('position() = 1');
+    }
+
+    public function translateIndirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath): XPathExpr
+    {
+        return $xpath->join('/following-sibling::', $combinedXpath);
+    }
+
+    public function getName(): string
+    {
+        return 'combination';
+    }
+}

vendor/symfony/css-selector/XPath/Extension/ExtensionInterface.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;
+
+/**
+ * XPath expression translator extension interface.
+ *
+ * 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
+ */
+interface ExtensionInterface
+{
+    /**
+     * Returns node translators.
+     *
+     * These callables will receive the node as first argument and the translator as second argument.
+     *
+     * @return callable[]
+     */
+    public function getNodeTranslators(): array;
+
+    /**
+     * Returns combination translators.
+     *
+     * @return callable[]
+     */
+    public function getCombinationTranslators(): array;
+
+    /**
+     * Returns function translators.
+     *
+     * @return callable[]
+     */
+    public function getFunctionTranslators(): array;
+
+    /**
+     * Returns pseudo-class translators.
+     *
+     * @return callable[]
+     */
+    public function getPseudoClassTranslators(): array;
+
+    /**
+     * Returns attribute operation translators.
+     *
+     * @return callable[]
+     */
+    public function getAttributeMatchingTranslators(): array;
+
+    /**
+     * Returns extension name.
+     */
+    public function getName(): string;
+}

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

@@ -0,0 +1,165 @@
+<?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\Exception\ExpressionErrorException;
+use Symfony\Component\CssSelector\Exception\SyntaxErrorException;
+use Symfony\Component\CssSelector\Node\FunctionNode;
+use Symfony\Component\CssSelector\Parser\Parser;
+use Symfony\Component\CssSelector\XPath\Translator;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator function 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 FunctionExtension extends AbstractExtension
+{
+    public function getFunctionTranslators(): array
+    {
+        return [
+            'nth-child' => $this->translateNthChild(...),
+            'nth-last-child' => $this->translateNthLastChild(...),
+            'nth-of-type' => $this->translateNthOfType(...),
+            'nth-last-of-type' => $this->translateNthLastOfType(...),
+            'contains' => $this->translateContains(...),
+            'lang' => $this->translateLang(...),
+        ];
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateNthChild(XPathExpr $xpath, FunctionNode $function, bool $last = false, bool $addNameTest = true): XPathExpr
+    {
+        try {
+            [$a, $b] = Parser::parseSeries($function->getArguments());
+        } catch (SyntaxErrorException $e) {
+            throw new ExpressionErrorException(sprintf('Invalid series: "%s".', implode('", "', $function->getArguments())), 0, $e);
+        }
+
+        $xpath->addStarPrefix();
+        if ($addNameTest) {
+            $xpath->addNameTest();
+        }
+
+        if (0 === $a) {
+            return $xpath->addCondition('position() = '.($last ? 'last() - '.($b - 1) : $b));
+        }
+
+        if ($a < 0) {
+            if ($b < 1) {
+                return $xpath->addCondition('false()');
+            }
+
+            $sign = '<=';
+        } else {
+            $sign = '>=';
+        }
+
+        $expr = 'position()';
+
+        if ($last) {
+            $expr = 'last() - '.$expr;
+            --$b;
+        }
+
+        if (0 !== $b) {
+            $expr .= ' - '.$b;
+        }
+
+        $conditions = [sprintf('%s %s 0', $expr, $sign)];
+
+        if (1 !== $a && -1 !== $a) {
+            $conditions[] = sprintf('(%s) mod %d = 0', $expr, $a);
+        }
+
+        return $xpath->addCondition(implode(' and ', $conditions));
+
+        // todo: handle an+b, odd, even
+        // an+b means every-a, plus b, e.g., 2n+1 means odd
+        // 0n+b means b
+        // n+0 means a=1, i.e., all elements
+        // an means every a elements, i.e., 2n means even
+        // -n means -1n
+        // -1n+6 means elements 6 and previous
+    }
+
+    public function translateNthLastChild(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        return $this->translateNthChild($xpath, $function, true);
+    }
+
+    public function translateNthOfType(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        return $this->translateNthChild($xpath, $function, false, false);
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateNthLastOfType(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        if ('*' === $xpath->getElement()) {
+            throw new ExpressionErrorException('"*:nth-of-type()" is not implemented.');
+        }
+
+        return $this->translateNthChild($xpath, $function, true, false);
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateContains(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        $arguments = $function->getArguments();
+        foreach ($arguments as $token) {
+            if (!($token->isString() || $token->isIdentifier())) {
+                throw new ExpressionErrorException('Expected a single string or identifier for :contains(), got '.implode(', ', $arguments));
+            }
+        }
+
+        return $xpath->addCondition(sprintf(
+            'contains(string(.), %s)',
+            Translator::getXpathLiteral($arguments[0]->getValue())
+        ));
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateLang(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        $arguments = $function->getArguments();
+        foreach ($arguments as $token) {
+            if (!($token->isString() || $token->isIdentifier())) {
+                throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got '.implode(', ', $arguments));
+            }
+        }
+
+        return $xpath->addCondition(sprintf(
+            'lang(%s)',
+            Translator::getXpathLiteral($arguments[0]->getValue())
+        ));
+    }
+
+    public function getName(): string
+    {
+        return 'function';
+    }
+}

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

@@ -0,0 +1,178 @@
+<?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\Exception\ExpressionErrorException;
+use Symfony\Component\CssSelector\Node\FunctionNode;
+use Symfony\Component\CssSelector\XPath\Translator;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator HTML 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 HtmlExtension extends AbstractExtension
+{
+    public function __construct(Translator $translator)
+    {
+        $translator
+            ->getExtension('node')
+            ->setFlag(NodeExtension::ELEMENT_NAME_IN_LOWER_CASE, true)
+            ->setFlag(NodeExtension::ATTRIBUTE_NAME_IN_LOWER_CASE, true);
+    }
+
+    public function getPseudoClassTranslators(): array
+    {
+        return [
+            'checked' => $this->translateChecked(...),
+            'link' => $this->translateLink(...),
+            'disabled' => $this->translateDisabled(...),
+            'enabled' => $this->translateEnabled(...),
+            'selected' => $this->translateSelected(...),
+            'invalid' => $this->translateInvalid(...),
+            'hover' => $this->translateHover(...),
+            'visited' => $this->translateVisited(...),
+        ];
+    }
+
+    public function getFunctionTranslators(): array
+    {
+        return [
+            'lang' => $this->translateLang(...),
+        ];
+    }
+
+    public function translateChecked(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition(
+            '(@checked '
+            ."and (name(.) = 'input' or name(.) = 'command')"
+            ."and (@type = 'checkbox' or @type = 'radio'))"
+        );
+    }
+
+    public function translateLink(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition("@href and (name(.) = 'a' or name(.) = 'link' or name(.) = 'area')");
+    }
+
+    public function translateDisabled(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition(
+            '('
+                .'@disabled and'
+                .'('
+                    ."(name(.) = 'input' and @type != 'hidden')"
+                    ." or name(.) = 'button'"
+                    ." or name(.) = 'select'"
+                    ." or name(.) = 'textarea'"
+                    ." or name(.) = 'command'"
+                    ." or name(.) = 'fieldset'"
+                    ." or name(.) = 'optgroup'"
+                    ." or name(.) = 'option'"
+                .')'
+            .') or ('
+                ."(name(.) = 'input' and @type != 'hidden')"
+                ." or name(.) = 'button'"
+                ." or name(.) = 'select'"
+                ." or name(.) = 'textarea'"
+            .')'
+            .' and ancestor::fieldset[@disabled]'
+        );
+        // todo: in the second half, add "and is not a descendant of that fieldset element's first legend element child, if any."
+    }
+
+    public function translateEnabled(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition(
+            '('
+                .'@href and ('
+                    ."name(.) = 'a'"
+                    ." or name(.) = 'link'"
+                    ." or name(.) = 'area'"
+                .')'
+            .') or ('
+                .'('
+                    ."name(.) = 'command'"
+                    ." or name(.) = 'fieldset'"
+                    ." or name(.) = 'optgroup'"
+                .')'
+                .' and not(@disabled)'
+            .') or ('
+                .'('
+                    ."(name(.) = 'input' and @type != 'hidden')"
+                    ." or name(.) = 'button'"
+                    ." or name(.) = 'select'"
+                    ." or name(.) = 'textarea'"
+                    ." or name(.) = 'keygen'"
+                .')'
+                .' and not (@disabled or ancestor::fieldset[@disabled])'
+            .') or ('
+                ."name(.) = 'option' and not("
+                    .'@disabled or ancestor::optgroup[@disabled]'
+                .')'
+            .')'
+        );
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateLang(XPathExpr $xpath, FunctionNode $function): XPathExpr
+    {
+        $arguments = $function->getArguments();
+        foreach ($arguments as $token) {
+            if (!($token->isString() || $token->isIdentifier())) {
+                throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got '.implode(', ', $arguments));
+            }
+        }
+
+        return $xpath->addCondition(sprintf(
+            'ancestor-or-self::*[@lang][1][starts-with(concat('
+            ."translate(@%s, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), '-')"
+            .', %s)]',
+            'lang',
+            Translator::getXpathLiteral(strtolower($arguments[0]->getValue()).'-')
+        ));
+    }
+
+    public function translateSelected(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition("(@selected and name(.) = 'option')");
+    }
+
+    public function translateInvalid(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('0');
+    }
+
+    public function translateHover(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('0');
+    }
+
+    public function translateVisited(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('0');
+    }
+
+    public function getName(): string
+    {
+        return 'html';
+    }
+}

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

@@ -0,0 +1,191 @@
+<?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\Node;
+use Symfony\Component\CssSelector\XPath\Translator;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator node 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 NodeExtension extends AbstractExtension
+{
+    public const ELEMENT_NAME_IN_LOWER_CASE = 1;
+    public const ATTRIBUTE_NAME_IN_LOWER_CASE = 2;
+    public const ATTRIBUTE_VALUE_IN_LOWER_CASE = 4;
+
+    private int $flags;
+
+    public function __construct(int $flags = 0)
+    {
+        $this->flags = $flags;
+    }
+
+    /**
+     * @return $this
+     */
+    public function setFlag(int $flag, bool $on): static
+    {
+        if ($on && !$this->hasFlag($flag)) {
+            $this->flags += $flag;
+        }
+
+        if (!$on && $this->hasFlag($flag)) {
+            $this->flags -= $flag;
+        }
+
+        return $this;
+    }
+
+    public function hasFlag(int $flag): bool
+    {
+        return (bool) ($this->flags & $flag);
+    }
+
+    public function getNodeTranslators(): array
+    {
+        return [
+            'Selector' => $this->translateSelector(...),
+            'CombinedSelector' => $this->translateCombinedSelector(...),
+            'Negation' => $this->translateNegation(...),
+            'Function' => $this->translateFunction(...),
+            'Pseudo' => $this->translatePseudo(...),
+            'Attribute' => $this->translateAttribute(...),
+            'Class' => $this->translateClass(...),
+            'Hash' => $this->translateHash(...),
+            'Element' => $this->translateElement(...),
+        ];
+    }
+
+    public function translateSelector(Node\SelectorNode $node, Translator $translator): XPathExpr
+    {
+        return $translator->nodeToXPath($node->getTree());
+    }
+
+    public function translateCombinedSelector(Node\CombinedSelectorNode $node, Translator $translator): XPathExpr
+    {
+        return $translator->addCombination($node->getCombinator(), $node->getSelector(), $node->getSubSelector());
+    }
+
+    public function translateNegation(Node\NegationNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+        $subXpath = $translator->nodeToXPath($node->getSubSelector());
+        $subXpath->addNameTest();
+
+        if ($subXpath->getCondition()) {
+            return $xpath->addCondition(sprintf('not(%s)', $subXpath->getCondition()));
+        }
+
+        return $xpath->addCondition('0');
+    }
+
+    public function translateFunction(Node\FunctionNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+
+        return $translator->addFunction($xpath, $node);
+    }
+
+    public function translatePseudo(Node\PseudoNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+
+        return $translator->addPseudoClass($xpath, $node->getIdentifier());
+    }
+
+    public function translateAttribute(Node\AttributeNode $node, Translator $translator): XPathExpr
+    {
+        $name = $node->getAttribute();
+        $safe = $this->isSafeName($name);
+
+        if ($this->hasFlag(self::ATTRIBUTE_NAME_IN_LOWER_CASE)) {
+            $name = strtolower($name);
+        }
+
+        if ($node->getNamespace()) {
+            $name = sprintf('%s:%s', $node->getNamespace(), $name);
+            $safe = $safe && $this->isSafeName($node->getNamespace());
+        }
+
+        $attribute = $safe ? '@'.$name : sprintf('attribute::*[name() = %s]', Translator::getXpathLiteral($name));
+        $value = $node->getValue();
+        $xpath = $translator->nodeToXPath($node->getSelector());
+
+        if ($this->hasFlag(self::ATTRIBUTE_VALUE_IN_LOWER_CASE)) {
+            $value = strtolower($value);
+        }
+
+        return $translator->addAttributeMatching($xpath, $node->getOperator(), $attribute, $value);
+    }
+
+    public function translateClass(Node\ClassNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+
+        return $translator->addAttributeMatching($xpath, '~=', '@class', $node->getName());
+    }
+
+    public function translateHash(Node\HashNode $node, Translator $translator): XPathExpr
+    {
+        $xpath = $translator->nodeToXPath($node->getSelector());
+
+        return $translator->addAttributeMatching($xpath, '=', '@id', $node->getId());
+    }
+
+    public function translateElement(Node\ElementNode $node): XPathExpr
+    {
+        $element = $node->getElement();
+
+        if ($element && $this->hasFlag(self::ELEMENT_NAME_IN_LOWER_CASE)) {
+            $element = strtolower($element);
+        }
+
+        if ($element) {
+            $safe = $this->isSafeName($element);
+        } else {
+            $element = '*';
+            $safe = true;
+        }
+
+        if ($node->getNamespace()) {
+            $element = sprintf('%s:%s', $node->getNamespace(), $element);
+            $safe = $safe && $this->isSafeName($node->getNamespace());
+        }
+
+        $xpath = new XPathExpr('', $element);
+
+        if (!$safe) {
+            $xpath->addNameTest();
+        }
+
+        return $xpath;
+    }
+
+    public function getName(): string
+    {
+        return 'node';
+    }
+
+    private function isSafeName(string $name): bool
+    {
+        return 0 < preg_match('~^[a-zA-Z_][a-zA-Z0-9_.-]*$~', $name);
+    }
+}

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

@@ -0,0 +1,122 @@
+<?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\Exception\ExpressionErrorException;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator pseudo-class 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 PseudoClassExtension extends AbstractExtension
+{
+    public function getPseudoClassTranslators(): array
+    {
+        return [
+            'root' => $this->translateRoot(...),
+            'scope' => $this->translateScopePseudo(...),
+            'first-child' => $this->translateFirstChild(...),
+            'last-child' => $this->translateLastChild(...),
+            'first-of-type' => $this->translateFirstOfType(...),
+            'last-of-type' => $this->translateLastOfType(...),
+            'only-child' => $this->translateOnlyChild(...),
+            'only-of-type' => $this->translateOnlyOfType(...),
+            'empty' => $this->translateEmpty(...),
+        ];
+    }
+
+    public function translateRoot(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('not(parent::*)');
+    }
+
+    public function translateScopePseudo(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('1');
+    }
+
+    public function translateFirstChild(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath
+            ->addStarPrefix()
+            ->addNameTest()
+            ->addCondition('position() = 1');
+    }
+
+    public function translateLastChild(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath
+            ->addStarPrefix()
+            ->addNameTest()
+            ->addCondition('position() = last()');
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateFirstOfType(XPathExpr $xpath): XPathExpr
+    {
+        if ('*' === $xpath->getElement()) {
+            throw new ExpressionErrorException('"*:first-of-type" is not implemented.');
+        }
+
+        return $xpath
+            ->addStarPrefix()
+            ->addCondition('position() = 1');
+    }
+
+    /**
+     * @throws ExpressionErrorException
+     */
+    public function translateLastOfType(XPathExpr $xpath): XPathExpr
+    {
+        if ('*' === $xpath->getElement()) {
+            throw new ExpressionErrorException('"*:last-of-type" is not implemented.');
+        }
+
+        return $xpath
+            ->addStarPrefix()
+            ->addCondition('position() = last()');
+    }
+
+    public function translateOnlyChild(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath
+            ->addStarPrefix()
+            ->addNameTest()
+            ->addCondition('last() = 1');
+    }
+
+    public function translateOnlyOfType(XPathExpr $xpath): XPathExpr
+    {
+        $element = $xpath->getElement();
+
+        return $xpath->addCondition(sprintf('count(preceding-sibling::%s)=0 and count(following-sibling::%s)=0', $element, $element));
+    }
+
+    public function translateEmpty(XPathExpr $xpath): XPathExpr
+    {
+        return $xpath->addCondition('not(*) and not(string-length())');
+    }
+
+    public function getName(): string
+    {
+        return 'pseudo-class';
+    }
+}