156 lines
3.5 KiB
PHP
156 lines
3.5 KiB
PHP
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<?php
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namespace Symfony\Components\CssSelector\Node;
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use Symfony\Components\CssSelector\SyntaxError;
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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.potencier@symfony-project.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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/**
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* PseudoNode represents a "selector:ident" node.
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*
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* This component is a port of the Python lxml library,
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* which is copyright Infrae and distributed under the BSD license.
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*
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* @package symfony
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* @subpackage css_selector
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class PseudoNode implements NodeInterface
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{
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static protected $unsupported = array(
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'indeterminate', 'first-line', 'first-letter',
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'selection', 'before', 'after', 'link', 'visited',
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'active', 'focus', 'hover',
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);
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protected $element;
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protected $type;
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protected $ident;
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public function __construct($element, $type, $ident)
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{
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$this->element = $element;
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if (!in_array($type, array(':', '::')))
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{
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throw new SyntaxError(sprintf('The PseudoNode type can only be : or :: (%s given).', $type));
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}
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$this->type = $type;
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$this->ident = $ident;
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}
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public function __toString()
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{
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return sprintf('%s[%s%s%s]', __CLASS__, $this->element, $this->type, $this->ident);
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}
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public function toXpath()
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{
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$el_xpath = $this->element->toXpath();
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if (in_array($this->ident, self::$unsupported))
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{
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throw new SyntaxError(sprintf("The pseudo-class %s is unsupported", $this->ident));
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}
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$method = 'xpath_'.str_replace('-', '_', $this->ident);
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if (!method_exists($this, $method))
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{
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throw new SyntaxError(sprintf("The pseudo-class %s is unknown", $this->ident));
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}
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return $this->$method($el_xpath);
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}
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protected function xpath_checked($xpath)
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{
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# FIXME: is this really all the elements?
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$xpath->addCondition("(@selected or @checked) and (name(.) = 'input' or name(.) = 'option')");
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return $xpath;
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}
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protected function xpath_root($xpath)
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{
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# if this element is the root element
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throw new SyntaxError();
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}
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protected function xpath_first_child($xpath)
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{
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$xpath->addStarPrefix();
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$xpath->addNameTest();
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$xpath->addCondition('position() = 1');
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return $xpath;
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}
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protected function xpath_last_child($xpath)
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{
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$xpath->addStarPrefix();
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$xpath->addNameTest();
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$xpath->addCondition('position() = last()');
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return $xpath;
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}
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protected function xpath_first_of_type($xpath)
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{
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if ($xpath->getElement() == '*')
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{
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throw new SyntaxError("*:first-of-type is not implemented");
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}
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$xpath->addStarPrefix();
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$xpath->addCondition('position() = 1');
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return $xpath;
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}
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protected function xpath_last_of_type($xpath)
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{
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if ($xpath->getElement() == '*')
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{
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throw new SyntaxError("*:last-of-type is not implemented");
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}
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$xpath->addStarPrefix();
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$xpath->addCondition('position() = last()');
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return $xpath;
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}
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protected function xpath_only_child($xpath)
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{
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$xpath->addNameTest();
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$xpath->addStarPrefix();
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$xpath->addCondition('last() = 1');
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return $xpath;
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}
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protected function xpath_only_of_type($xpath)
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{
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if ($xpath->getElement() == '*')
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{
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throw new SyntaxError("*:only-of-type is not implemented");
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}
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$xpath->addCondition('last() = 1');
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return $xpath;
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}
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protected function xpath_empty($xpath)
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{
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$xpath->addCondition("not(*) and not(normalize-space())");
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return $xpath;
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}
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}
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