MediaWiki 1.30.2

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

diff --git a/vendor/wikimedia/css-sanitizer/src/Sanitizer/MediaAtRuleSanitizer.php b/vendor/wikimedia/css-sanitizer/src/Sanitizer/MediaAtRuleSanitizer.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 \@media rule
+ * @see https://www.w3.org/TR/2013/CR-css3-conditional-20130404/#at-media
+ */
+class MediaAtRuleSanitizer extends RuleSanitizer {
+
+       /** @var Matcher */
+       protected $mediaQueryListMatcher;
+
+       /** @var RuleSanitizer[] */
+       protected $ruleSanitizers = [];
+
+       /**
+        * @param Matcher $mediaQueryListMatcher Matcher for media query lists.
+        *  Probably from MatcherFactory::cssMediaQueryList().
+        */
+       public function __construct( Matcher $mediaQueryListMatcher ) {
+               $this->mediaQueryListMatcher = $mediaQueryListMatcher;
+       }
+
+       /**
+        * 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;
+       }
+
+       public function handlesRule( Rule $rule ) {
+               return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'media' );
+       }
+
+       protected function doSanitize( CSSObject $object ) {
+               if ( !$object instanceof Rule || !$this->handlesRule( $object ) ) {
+                       $this->sanitizationError( 'expected-at-rule', $object, [ 'media' ] );
+                       return null;
+               }
+
+               if ( $object->getBlock() === null ) {
+                       $this->sanitizationError( 'at-rule-block-required', $object, [ 'media' ] );
+                       return null;
+               }
+
+               // Test the media query
+               $match = $this->mediaQueryListMatcher->match(
+                       $object->getPrelude(), [ 'mark-significance' => true ]
+               );
+               if ( !$match ) {
+                       $cv = Util::findFirstNonWhitespace( $object->getPrelude() ) ?: $object->getPrelude();
+                       $this->sanitizationError( 'invalid-media-query', $cv );
+                       return null;
+               }
+
+               $ret = clone( $object );
+               $this->fixPreludeWhitespace( $ret, false );
+               $this->sanitizeRuleBlock( $ret->getBlock(), $this->ruleSanitizers );
+
+               return $ret;
+       }
+}