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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | /** |
| 5 | * @file |
| 6 | * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0 |
| 7 | */ |
| 8 | |
| 9 | namespace Wikimedia\CSS\Sanitizer; |
| 10 | |
| 11 | use Wikimedia\CSS\Grammar\Alternative; |
| 12 | use Wikimedia\CSS\Grammar\Juxtaposition; |
| 13 | use Wikimedia\CSS\Grammar\Matcher; |
| 14 | use Wikimedia\CSS\Grammar\MatcherFactory; |
| 15 | use Wikimedia\CSS\Grammar\Quantifier; |
| 16 | use Wikimedia\CSS\Objects\AtRule; |
| 17 | use Wikimedia\CSS\Objects\CSSObject; |
| 18 | use Wikimedia\CSS\Objects\Rule; |
| 19 | use Wikimedia\CSS\Util; |
| 20 | |
| 21 | /** |
| 22 | * Sanitizes a CSS \@namespace rule |
| 23 | * @see https://www.w3.org/TR/2014/REC-css-namespaces-3-20140320/ |
| 24 | */ |
| 25 | class NamespaceAtRuleSanitizer extends RuleSanitizer { |
| 26 | |
| 27 | /** @var Matcher */ |
| 28 | protected $matcher; |
| 29 | |
| 30 | /** |
| 31 | * @param MatcherFactory $matcherFactory |
| 32 | */ |
| 33 | public function __construct( MatcherFactory $matcherFactory ) { |
| 34 | $this->matcher = new Juxtaposition( [ |
| 35 | Quantifier::optional( $matcherFactory->ident() ), |
| 36 | new Alternative( [ |
| 37 | $matcherFactory->urlstring( 'namespace' ), |
| 38 | $matcherFactory->url( 'namespace' ), |
| 39 | ] ), |
| 40 | ] ); |
| 41 | } |
| 42 | |
| 43 | /** @inheritDoc */ |
| 44 | public function getIndex() { |
| 45 | return -900; |
| 46 | } |
| 47 | |
| 48 | /** @inheritDoc */ |
| 49 | public function handlesRule( Rule $rule ) { |
| 50 | return $rule instanceof AtRule && !strcasecmp( $rule->getName(), 'namespace' ); |
| 51 | } |
| 52 | |
| 53 | /** @inheritDoc */ |
| 54 | protected function doSanitize( CSSObject $object ) { |
| 55 | if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) { |
| 56 | $this->sanitizationError( 'expected-at-rule', $object, [ 'namespace' ] ); |
| 57 | return null; |
| 58 | } |
| 59 | |
| 60 | if ( $object->getBlock() !== null ) { |
| 61 | $this->sanitizationError( 'at-rule-block-not-allowed', $object->getBlock(), [ 'namespace' ] ); |
| 62 | return null; |
| 63 | } |
| 64 | if ( !$this->matcher->matchAgainst( $object->getPrelude(), [ 'mark-significance' => true ] ) ) { |
| 65 | $cv = Util::findFirstNonWhitespace( $object->getPrelude() ); |
| 66 | if ( $cv ) { |
| 67 | $this->sanitizationError( 'invalid-namespace-value', $cv ); |
| 68 | } else { |
| 69 | $this->sanitizationError( 'missing-namespace-value', $object ); |
| 70 | } |
| 71 | return null; |
| 72 | } |
| 73 | // @phan-suppress-next-line PhanTypeMismatchReturn generics weakness |
| 74 | return $this->fixPreludeWhitespace( $object, true ); |
| 75 | } |
| 76 | } |