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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\Grammar; |
| 10 | |
| 11 | use InvalidArgumentException; |
| 12 | use Wikimedia\CSS\Objects\ComponentValueList; |
| 13 | use Wikimedia\CSS\Objects\CSSFunction; |
| 14 | use Wikimedia\CSS\Objects\Token; |
| 15 | |
| 16 | /** |
| 17 | * Matcher that matches a CSSFunction for a URL function or a T_URL token |
| 18 | */ |
| 19 | class UrlMatcher extends FunctionMatcher { |
| 20 | /** @var callable|null */ |
| 21 | protected $urlCheck; |
| 22 | |
| 23 | /** |
| 24 | * @param callable|null $urlCheck Function to check that the URL is really valid. |
| 25 | * Prototype is bool func( string $url, ComponentValue[] $modifiers ) |
| 26 | * @param array $options Additional options: |
| 27 | * - modifierMatcher: (Matcher) Matcher for URL modifiers. The default is |
| 28 | * a NothingMatcher. |
| 29 | */ |
| 30 | public function __construct( ?callable $urlCheck = null, array $options = [] ) { |
| 31 | if ( isset( $options['modifierMatcher'] ) ) { |
| 32 | $modifierMatcher = $options['modifierMatcher']; |
| 33 | if ( !$modifierMatcher instanceof Matcher ) { |
| 34 | throw new InvalidArgumentException( 'modifierMatcher must be a Matcher' ); |
| 35 | } |
| 36 | } else { |
| 37 | $modifierMatcher = new NothingMatcher; |
| 38 | } |
| 39 | |
| 40 | $funcContents = new Juxtaposition( [ |
| 41 | TokenMatcher::create( Token::T_STRING )->capture( 'url' ), |
| 42 | Quantifier::star( $modifierMatcher->capture( 'modifier' ) ), |
| 43 | ] ); |
| 44 | |
| 45 | $this->urlCheck = $urlCheck; |
| 46 | parent::__construct( |
| 47 | static function ( $name ) { |
| 48 | return in_array( strtolower( $name ), [ 'url', 'src' ], true ); |
| 49 | }, |
| 50 | $funcContents |
| 51 | ); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Return a Matcher for any grammatically-correct modifier |
| 56 | * @return Matcher |
| 57 | */ |
| 58 | public static function anyModifierMatcher() { |
| 59 | return Alternative::create( [ |
| 60 | new TokenMatcher( Token::T_IDENT ), |
| 61 | new FunctionMatcher( null, new AnythingMatcher( [ 'quantifier' => '*' ] ) ), |
| 62 | ] ); |
| 63 | } |
| 64 | |
| 65 | /** @inheritDoc */ |
| 66 | protected function generateMatches( ComponentValueList $values, $start, array $options ) { |
| 67 | // First, is it a URL token? |
| 68 | $cv = $values[$start] ?? null; |
| 69 | if ( $cv instanceof Token && $cv->type() === Token::T_URL ) { |
| 70 | $url = $cv->value(); |
| 71 | if ( !$this->urlCheck || ( $this->urlCheck )( $url, [] ) ) { |
| 72 | $match = new GrammarMatch( $values, $start, 1, 'url' ); |
| 73 | yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ), $match ); |
| 74 | } |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | // Nope. Try it as a FunctionMatcher and extract the URL and modifiers |
| 79 | // for each match. |
| 80 | foreach ( parent::generateMatches( $values, $start, $options ) as $match ) { |
| 81 | $url = null; |
| 82 | $modifiers = []; |
| 83 | foreach ( $match->getCapturedMatches() as $submatch ) { |
| 84 | $cvs = $submatch->getValues(); |
| 85 | if ( $cvs[0] instanceof Token && $submatch->getName() === 'url' ) { |
| 86 | $url = $cvs[0]->value(); |
| 87 | } elseif ( $submatch->getName() === 'modifier' ) { |
| 88 | if ( $cvs[0] instanceof CSSFunction ) { |
| 89 | $modifiers[] = $cvs[0]; |
| 90 | } elseif ( $cvs[0] instanceof Token && $cvs[0]->type() === Token::T_IDENT ) { |
| 91 | $modifiers[] = $cvs[0]; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | if ( $url && ( !$this->urlCheck || ( $this->urlCheck )( $url, $modifiers ) ) ) { |
| 96 | yield $match; |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | } |