MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / vendor / wikimedia / css-sanitizer / src / Sanitizer / KeyframesAtRuleSanitizer.php

diff --git a/vendor/wikimedia/css-sanitizer/src/Sanitizer/KeyframesAtRuleSanitizer.php b/vendor/wikimedia/css-sanitizer/src/Sanitizer/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/2013/WD-css3-animations-20130219/#keyframes
+ */
+class KeyframesAtRuleSanitizer extends RuleSanitizer {
+
+       /** @var Matcher */
+       protected $identMatcher;
+
+       /** @var Sanitizer */
+       protected $ruleSanitizer;
+
+       /**
+        * @param MatcherFactory $matcherFactory
+        * @param PropertySanitizer $propertySanitizer Sanitizer for declarations
+        */
+       public function __construct(
+               MatcherFactory $matcherFactory, PropertySanitizer $propertySanitizer
+       ) {
+               $this->identMatcher = $matcherFactory->ident();
+               $this->ruleSanitizer = new StyleRuleSanitizer(
+                       Quantifier::hash( new Alternative( [
+                               new KeywordMatcher( [ 'from', 'to' ] ), $matcherFactory->rawPercentage()
+                       ] ) ),
+                       $propertySanitizer
+               );
+       }
+
+       public function handlesRule( Rule $rule ) {
+               return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'keyframes' );
+       }
+
+       protected function doSanitize( CSSObject $object ) {
+               if ( !$object instanceof Rule || !$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->identMatcher->match( $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;
+       }
+}