Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\CssSelector\XPath\Extension;
Chris@0: 
Chris@0: use Symfony\Component\CssSelector\Exception\ExpressionErrorException;
Chris@0: use Symfony\Component\CssSelector\Node\FunctionNode;
Chris@0: use Symfony\Component\CssSelector\XPath\Translator;
Chris@0: use Symfony\Component\CssSelector\XPath\XPathExpr;
Chris@0: 
Chris@0: /**
Chris@0:  * XPath expression translator HTML extension.
Chris@0:  *
Chris@0:  * This component is a port of the Python cssselect library,
Chris@0:  * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
Chris@0:  *
Chris@0:  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
Chris@0:  *
Chris@0:  * @internal
Chris@0:  */
Chris@0: class HtmlExtension extends AbstractExtension
Chris@0: {
Chris@0:     public function __construct(Translator $translator)
Chris@0:     {
Chris@0:         $translator
Chris@0:             ->getExtension('node')
Chris@0:             ->setFlag(NodeExtension::ELEMENT_NAME_IN_LOWER_CASE, true)
Chris@0:             ->setFlag(NodeExtension::ATTRIBUTE_NAME_IN_LOWER_CASE, true);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getPseudoClassTranslators()
Chris@0:     {
Chris@17:         return [
Chris@17:             'checked' => [$this, 'translateChecked'],
Chris@17:             'link' => [$this, 'translateLink'],
Chris@17:             'disabled' => [$this, 'translateDisabled'],
Chris@17:             'enabled' => [$this, 'translateEnabled'],
Chris@17:             'selected' => [$this, 'translateSelected'],
Chris@17:             'invalid' => [$this, 'translateInvalid'],
Chris@17:             'hover' => [$this, 'translateHover'],
Chris@17:             'visited' => [$this, 'translateVisited'],
Chris@17:         ];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getFunctionTranslators()
Chris@0:     {
Chris@17:         return [
Chris@17:             'lang' => [$this, 'translateLang'],
Chris@17:         ];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateChecked(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition(
Chris@0:             '(@checked '
Chris@0:             ."and (name(.) = 'input' or name(.) = 'command')"
Chris@0:             ."and (@type = 'checkbox' or @type = 'radio'))"
Chris@0:         );
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateLink(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition("@href and (name(.) = 'a' or name(.) = 'link' or name(.) = 'area')");
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateDisabled(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition(
Chris@0:             '('
Chris@0:                 .'@disabled and'
Chris@0:                 .'('
Chris@0:                     ."(name(.) = 'input' and @type != 'hidden')"
Chris@0:                     ." or name(.) = 'button'"
Chris@0:                     ." or name(.) = 'select'"
Chris@0:                     ." or name(.) = 'textarea'"
Chris@0:                     ." or name(.) = 'command'"
Chris@0:                     ." or name(.) = 'fieldset'"
Chris@0:                     ." or name(.) = 'optgroup'"
Chris@0:                     ." or name(.) = 'option'"
Chris@0:                 .')'
Chris@0:             .') or ('
Chris@0:                 ."(name(.) = 'input' and @type != 'hidden')"
Chris@0:                 ." or name(.) = 'button'"
Chris@0:                 ." or name(.) = 'select'"
Chris@0:                 ." or name(.) = 'textarea'"
Chris@0:             .')'
Chris@0:             .' and ancestor::fieldset[@disabled]'
Chris@0:         );
Chris@0:         // todo: in the second half, add "and is not a descendant of that fieldset element's first legend element child, if any."
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateEnabled(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition(
Chris@0:             '('
Chris@0:                 .'@href and ('
Chris@0:                     ."name(.) = 'a'"
Chris@0:                     ." or name(.) = 'link'"
Chris@0:                     ." or name(.) = 'area'"
Chris@0:                 .')'
Chris@0:             .') or ('
Chris@0:                 .'('
Chris@0:                     ."name(.) = 'command'"
Chris@0:                     ." or name(.) = 'fieldset'"
Chris@0:                     ." or name(.) = 'optgroup'"
Chris@0:                 .')'
Chris@0:                 .' and not(@disabled)'
Chris@0:             .') or ('
Chris@0:                 .'('
Chris@0:                     ."(name(.) = 'input' and @type != 'hidden')"
Chris@0:                     ." or name(.) = 'button'"
Chris@0:                     ." or name(.) = 'select'"
Chris@0:                     ." or name(.) = 'textarea'"
Chris@0:                     ." or name(.) = 'keygen'"
Chris@0:                 .')'
Chris@0:                 .' and not (@disabled or ancestor::fieldset[@disabled])'
Chris@0:             .') or ('
Chris@0:                 ."name(.) = 'option' and not("
Chris@0:                     .'@disabled or ancestor::optgroup[@disabled]'
Chris@0:                 .')'
Chris@0:             .')'
Chris@0:         );
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      *
Chris@0:      * @throws ExpressionErrorException
Chris@0:      */
Chris@0:     public function translateLang(XPathExpr $xpath, FunctionNode $function)
Chris@0:     {
Chris@0:         $arguments = $function->getArguments();
Chris@0:         foreach ($arguments as $token) {
Chris@0:             if (!($token->isString() || $token->isIdentifier())) {
Chris@17:                 throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got '.implode(', ', $arguments));
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $xpath->addCondition(sprintf(
Chris@0:             'ancestor-or-self::*[@lang][1][starts-with(concat('
Chris@0:             ."translate(@%s, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), '-')"
Chris@0:             .', %s)]',
Chris@0:             'lang',
Chris@0:             Translator::getXpathLiteral(strtolower($arguments[0]->getValue()).'-')
Chris@0:         ));
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateSelected(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition("(@selected and name(.) = 'option')");
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateInvalid(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition('0');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateHover(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition('0');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return XPathExpr
Chris@0:      */
Chris@0:     public function translateVisited(XPathExpr $xpath)
Chris@0:     {
Chris@0:         return $xpath->addCondition('0');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function getName()
Chris@0:     {
Chris@0:         return 'html';
Chris@0:     }
Chris@0: }