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KeyframesAtRuleSanitizer.php
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KeyframesAtRuleSanitizer.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\Alternative;
use Wikimedia\CSS\Grammar\KeywordMatcher;
use Wikimedia\CSS\Grammar\Matcher;
use Wikimedia\CSS\Grammar\MatcherFactory;
use Wikimedia\CSS\Grammar\Quantifier;
use Wikimedia\CSS\Objects\AtRule;
use Wikimedia\CSS\Objects\CSSObject;
use Wikimedia\CSS\Objects\Rule;
use Wikimedia\CSS\Util;
/**
* Sanitizes a CSS \@keyframes rule
* @see https://www.w3.org/TR/2018/WD-css-animations-1-20181011/#keyframes
*/
class KeyframesAtRuleSanitizer extends RuleSanitizer {
/** @var Matcher */
protected $nameMatcher;
/** @var Sanitizer */
protected $ruleSanitizer;
/**
* @param MatcherFactory $matcherFactory
* @param PropertySanitizer $propertySanitizer Sanitizer for declarations
*/
public function __construct(
MatcherFactory $matcherFactory, PropertySanitizer $propertySanitizer
) {
$this->nameMatcher = new Alternative( [
$matcherFactory->customIdent( [ 'none' ] ),
$matcherFactory->string(),
] );
$this->ruleSanitizer = new StyleRuleSanitizer(
Quantifier::hash( new Alternative( [
new KeywordMatcher( [ 'from', 'to' ] ), $matcherFactory->rawPercentage()
] ) ),
$propertySanitizer
);
}
/** @inheritDoc */
public function handlesRule( Rule $rule ) {
return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'keyframes' );
}
/** @inheritDoc */
protected function doSanitize( CSSObject $object ) {
if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) {
$this->sanitizationError( 'expected-at-rule', $object, [ 'keyframes' ] );
return null;
}
if ( $object->getBlock() === null ) {
$this->sanitizationError( 'at-rule-block-required', $object, [ 'keyframes' ] );
return null;
}
// Test the keyframe name
if ( !$this->nameMatcher->matchAgainst( $object->getPrelude(), [ 'mark-significance' => true ] ) ) {
$cv = Util::findFirstNonWhitespace( $object->getPrelude() );
if ( $cv ) {
$this->sanitizationError( 'invalid-keyframe-name', $cv );
} else {
$this->sanitizationError( 'missing-keyframe-name', $object );
}
return null;
}
$ret = clone $object;
$this->fixPreludeWhitespace( $ret, false );
$this->sanitizeRuleBlock( $ret->getBlock(), [ $this->ruleSanitizer ] );
return $ret;
}
}

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text/x-php
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Sat, May 16, 22:29 (2 h, 16 m)
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b1/65/8816eb802e776eca8d2e50e5334e
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KeyframesAtRuleSanitizer.php (2 KB)

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