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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\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';
}
}