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편집 파일: HtmlExtension.php
<?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 cssselector library, * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. * * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> */ class HtmlExtension extends AbstractExtension { /** * Constructor. * * @param Translator $translator */ public function __construct(Translator $translator) { $translator ->getExtension('node') ->setFlag(NodeExtension::ELEMENT_NAME_IN_LOWER_CASE, true) ->setFlag(NodeExtension::ATTRIBUTE_NAME_IN_LOWER_CASE, true); } /** * {@inheritdoc} */ public function getPseudoClassTranslators() { return array( 'checked' => array($this, 'translateChecked'), 'link' => array($this, 'translateLink'), 'disabled' => array($this, 'translateDisabled'), 'enabled' => array($this, 'translateEnabled'), 'selected' => array($this, 'translateSelected'), 'invalid' => array($this, 'translateInvalid'), 'hover' => array($this, 'translateHover'), 'visited' => array($this, 'translateVisited'), ); } /** * {@inheritdoc} */ public function getFunctionTranslators() { return array( 'lang' => array($this, 'translateLang'), ); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateChecked(XPathExpr $xpath) { return $xpath->addCondition( '(@checked ' ."and (name(.) = 'input' or name(.) = 'command')" ."and (@type = 'checkbox' or @type = 'radio'))" ); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateLink(XPathExpr $xpath) { return $xpath->addCondition("@href and (name(.) = 'a' or name(.) = 'link' or name(.) = 'area')"); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateDisabled(XPathExpr $xpath) { 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." } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateEnabled(XPathExpr $xpath) { 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]" .')' .')' ); } /** * @param XPathExpr $xpath * @param FunctionNode $function * * @return XPathExpr * * @throws ExpressionErrorException */ public function translateLang(XPathExpr $xpath, FunctionNode $function) { $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()).'-') )); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateSelected(XPathExpr $xpath) { return $xpath->addCondition("(@selected and name(.) = 'option')"); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateInvalid(XPathExpr $xpath) { return $xpath->addCondition('0'); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateHover(XPathExpr $xpath) { return $xpath->addCondition('0'); } /** * @param XPathExpr $xpath * * @return XPathExpr */ public function translateVisited(XPathExpr $xpath) { return $xpath->addCondition('0'); } /** * {@inheritdoc} */ public function getName() { return 'html'; } }