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SupportsAtRuleSanitizer.php
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SupportsAtRuleSanitizer.php
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<?php
/**
* @file
* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
*/
namespace Wikimedia\CSS\Sanitizer;
use Wikimedia\CSS\Grammar\Matcher;
use Wikimedia\CSS\Grammar\MatcherFactory;
use Wikimedia\CSS\Objects\AtRule;
use Wikimedia\CSS\Objects\CSSObject;
use Wikimedia\CSS\Objects\Rule;
use Wikimedia\CSS\Util;
/**
* Sanitizes a CSS \@supports rule
* @see https://www.w3.org/TR/2013/CR-css3-conditional-20130404/#at-supports
*/
class SupportsAtRuleSanitizer extends RuleSanitizer {
/** @var Matcher */
protected $conditionMatcher;
/** @var RuleSanitizer[] */
protected $ruleSanitizers = [];
/**
* @param MatcherFactory $matcherFactory
* @param array $options Additional options:
* - strict: (bool) Only accept defined syntax. Default true.
* - declarationSanitizer: (PropertySanitizer) Check declarations against this Sanitizer.
*/
public function __construct( MatcherFactory $matcherFactory, array $options = [] ) {
$this->conditionMatcher = $matcherFactory->cssSupportsCondition(
$options['declarationSanitizer'] ?? null,
$options['strict'] ?? true
);
}
/**
* Access the list of rule sanitizers
* @return RuleSanitizer[]
*/
public function getRuleSanitizers() {
return $this->ruleSanitizers;
}
/**
* Set the list of rule sanitizers
* @param RuleSanitizer[] $ruleSanitizers
*/
public function setRuleSanitizers( array $ruleSanitizers ) {
Util::assertAllInstanceOf( $ruleSanitizers, RuleSanitizer::class, '$ruleSanitizers' );
$this->ruleSanitizers = $ruleSanitizers;
}
/** @inheritDoc */
public function handlesRule( Rule $rule ) {
return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'supports' );
}
/** @inheritDoc */
protected function doSanitize( CSSObject $object ) {
if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) {
$this->sanitizationError( 'expected-at-rule', $object, [ 'supports' ] );
return null;
}
if ( $object->getBlock() === null ) {
$this->sanitizationError( 'at-rule-block-required', $object, [ 'supports' ] );
return null;
}
// Test the media query
if ( !$this->conditionMatcher->matchAgainst( $object->getPrelude(), [ 'mark-significance' => true ] ) ) {
$cv = Util::findFirstNonWhitespace( $object->getPrelude() );
if ( $cv ) {
$this->sanitizationError( 'invalid-supports-condition', $cv );
} else {
$this->sanitizationError( 'missing-supports-condition', $object );
}
return null;
}
$ret = clone $object;
$this->fixPreludeWhitespace( $ret, false );
$this->sanitizeRuleBlock( $ret->getBlock(), $this->ruleSanitizers );
return $ret;
}
}

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SupportsAtRuleSanitizer.php (2 KB)

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