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| 1 | <?php |
| 2 | /** |
| 3 | * @file |
| 4 | * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0 |
| 5 | */ |
| 6 | |
| 7 | namespace Wikimedia\CSS\Sanitizer; |
| 8 | |
| 9 | use Wikimedia\CSS\Grammar\Alternative; |
| 10 | use Wikimedia\CSS\Grammar\KeywordMatcher; |
| 11 | use Wikimedia\CSS\Grammar\Matcher; |
| 12 | use Wikimedia\CSS\Grammar\MatcherFactory; |
| 13 | use Wikimedia\CSS\Grammar\Quantifier; |
| 14 | use Wikimedia\CSS\Objects\AtRule; |
| 15 | use Wikimedia\CSS\Objects\CSSObject; |
| 16 | use Wikimedia\CSS\Objects\Rule; |
| 17 | use Wikimedia\CSS\Util; |
| 18 | |
| 19 | /** |
| 20 | * Sanitizes a CSS \@keyframes rule |
| 21 | * @see https://www.w3.org/TR/2018/WD-css-animations-1-20181011/#keyframes |
| 22 | */ |
| 23 | class KeyframesAtRuleSanitizer extends RuleSanitizer { |
| 24 | |
| 25 | /** @var Matcher */ |
| 26 | protected $nameMatcher; |
| 27 | |
| 28 | /** @var Sanitizer */ |
| 29 | protected $ruleSanitizer; |
| 30 | |
| 31 | /** |
| 32 | * @param MatcherFactory $matcherFactory |
| 33 | * @param PropertySanitizer $propertySanitizer Sanitizer for declarations |
| 34 | */ |
| 35 | public function __construct( |
| 36 | MatcherFactory $matcherFactory, PropertySanitizer $propertySanitizer |
| 37 | ) { |
| 38 | $this->nameMatcher = new Alternative( [ |
| 39 | $matcherFactory->customIdent( [ 'none' ] ), |
| 40 | $matcherFactory->string(), |
| 41 | ] ); |
| 42 | $this->ruleSanitizer = new StyleRuleSanitizer( |
| 43 | Quantifier::hash( new Alternative( [ |
| 44 | new KeywordMatcher( [ 'from', 'to' ] ), $matcherFactory->rawPercentage() |
| 45 | ] ) ), |
| 46 | $propertySanitizer |
| 47 | ); |
| 48 | } |
| 49 | |
| 50 | /** @inheritDoc */ |
| 51 | public function handlesRule( Rule $rule ) { |
| 52 | return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'keyframes' ); |
| 53 | } |
| 54 | |
| 55 | /** @inheritDoc */ |
| 56 | protected function doSanitize( CSSObject $object ) { |
| 57 | if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) { |
| 58 | $this->sanitizationError( 'expected-at-rule', $object, [ 'keyframes' ] ); |
| 59 | return null; |
| 60 | } |
| 61 | |
| 62 | if ( $object->getBlock() === null ) { |
| 63 | $this->sanitizationError( 'at-rule-block-required', $object, [ 'keyframes' ] ); |
| 64 | return null; |
| 65 | } |
| 66 | |
| 67 | // Test the keyframe name |
| 68 | if ( !$this->nameMatcher->matchAgainst( $object->getPrelude(), [ 'mark-significance' => true ] ) ) { |
| 69 | $cv = Util::findFirstNonWhitespace( $object->getPrelude() ); |
| 70 | if ( $cv ) { |
| 71 | $this->sanitizationError( 'invalid-keyframe-name', $cv ); |
| 72 | } else { |
| 73 | $this->sanitizationError( 'missing-keyframe-name', $object ); |
| 74 | } |
| 75 | return null; |
| 76 | } |
| 77 | |
| 78 | $ret = clone $object; |
| 79 | $this->fixPreludeWhitespace( $ret, false ); |
| 80 | $this->sanitizeRuleBlock( $ret->getBlock(), [ $this->ruleSanitizer ] ); |
| 81 | |
| 82 | return $ret; |
| 83 | } |
| 84 | } |