Viewing file:  AttributeMatchingExtension.php (4.69 KB) -rw-r--r--
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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
{
/**
* {@inheritdoc}
*/
public function getAttributeMatchingTranslators()
{
return array(
'exists' => array($this, 'translateExists'),
'=' => array($this, 'translateEquals'),
'~=' => array($this, 'translateIncludes'),
'|=' => array($this, 'translateDashMatch'),
'^=' => array($this, 'translatePrefixMatch'),
'$=' => array($this, 'translateSuffixMatch'),
'*=' => array($this, 'translateSubstringMatch'),
'!=' => array($this, 'translateDifferent'),
);
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateExists(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition($attribute);
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateEquals(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition(sprintf('%s = %s', $attribute, Translator::getXpathLiteral($value)));
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateIncludes(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition($value ? sprintf(
'%1$s and contains(concat(\' \', normalize-space(%1$s), \' \'), %2$s)',
$attribute,
Translator::getXpathLiteral(' '.$value.' ')
) : '0');
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateDashMatch(XPathExpr $xpath, $attribute, $value)
{
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.'-')
));
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translatePrefixMatch(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition($value ? sprintf(
'%1$s and starts-with(%1$s, %2$s)',
$attribute,
Translator::getXpathLiteral($value)
) : '0');
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateSuffixMatch(XPathExpr $xpath, $attribute, $value)
{
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');
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateSubstringMatch(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition($value ? sprintf(
'%1$s and contains(%1$s, %2$s)',
$attribute,
Translator::getXpathLiteral($value)
) : '0');
}
/**
* @param XPathExpr $xpath
* @param string $attribute
* @param string $value
*
* @return XPathExpr
*/
public function translateDifferent(XPathExpr $xpath, $attribute, $value)
{
return $xpath->addCondition(sprintf(
$value ? 'not(%1$s) or %1$s != %2$s' : '%s != %s',
$attribute,
Translator::getXpathLiteral($value)
));
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'attribute-matching';
}
}
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