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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\Matcher; |
| 10 | use Wikimedia\CSS\Objects\AtRule; |
| 11 | use Wikimedia\CSS\Objects\CSSObject; |
| 12 | use Wikimedia\CSS\Objects\Rule; |
| 13 | use Wikimedia\CSS\Util; |
| 14 | |
| 15 | /** |
| 16 | * Sanitizes a CSS \@media rule |
| 17 | * @see https://www.w3.org/TR/2013/CR-css3-conditional-20130404/#at-media |
| 18 | */ |
| 19 | class MediaAtRuleSanitizer extends RuleSanitizer { |
| 20 | |
| 21 | /** @var Matcher */ |
| 22 | protected $mediaQueryListMatcher; |
| 23 | |
| 24 | /** @var RuleSanitizer[] */ |
| 25 | protected $ruleSanitizers = []; |
| 26 | |
| 27 | /** |
| 28 | * @param Matcher $mediaQueryListMatcher Matcher for media query lists. |
| 29 | * Probably from MatcherFactory::cssMediaQueryList(). |
| 30 | */ |
| 31 | public function __construct( Matcher $mediaQueryListMatcher ) { |
| 32 | $this->mediaQueryListMatcher = $mediaQueryListMatcher; |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Access the list of rule sanitizers |
| 37 | * @return RuleSanitizer[] |
| 38 | */ |
| 39 | public function getRuleSanitizers() { |
| 40 | return $this->ruleSanitizers; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Set the list of rule sanitizers |
| 45 | * @param RuleSanitizer[] $ruleSanitizers |
| 46 | */ |
| 47 | public function setRuleSanitizers( array $ruleSanitizers ) { |
| 48 | Util::assertAllInstanceOf( $ruleSanitizers, RuleSanitizer::class, '$ruleSanitizers' ); |
| 49 | $this->ruleSanitizers = $ruleSanitizers; |
| 50 | } |
| 51 | |
| 52 | /** @inheritDoc */ |
| 53 | public function handlesRule( Rule $rule ) { |
| 54 | return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'media' ); |
| 55 | } |
| 56 | |
| 57 | /** @inheritDoc */ |
| 58 | protected function doSanitize( CSSObject $object ) { |
| 59 | if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) { |
| 60 | $this->sanitizationError( 'expected-at-rule', $object, [ 'media' ] ); |
| 61 | return null; |
| 62 | } |
| 63 | |
| 64 | if ( $object->getBlock() === null ) { |
| 65 | $this->sanitizationError( 'at-rule-block-required', $object, [ 'media' ] ); |
| 66 | return null; |
| 67 | } |
| 68 | |
| 69 | // Test the media query |
| 70 | $match = $this->mediaQueryListMatcher->matchAgainst( |
| 71 | $object->getPrelude(), [ 'mark-significance' => true ] |
| 72 | ); |
| 73 | if ( !$match ) { |
| 74 | $cv = Util::findFirstNonWhitespace( $object->getPrelude() ) ?: $object->getPrelude(); |
| 75 | $this->sanitizationError( 'invalid-media-query', $cv ); |
| 76 | return null; |
| 77 | } |
| 78 | |
| 79 | $ret = clone $object; |
| 80 | $this->fixPreludeWhitespace( $ret, false ); |
| 81 | $this->sanitizeRuleBlock( $ret->getBlock(), $this->ruleSanitizers ); |
| 82 | |
| 83 | return $ret; |
| 84 | } |
| 85 | } |