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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\Grammar; |
| 8 | |
| 9 | use InvalidArgumentException; |
| 10 | use Wikimedia\CSS\Objects\ComponentValueList; |
| 11 | use Wikimedia\CSS\Objects\CSSFunction; |
| 12 | use Wikimedia\CSS\Objects\Token; |
| 13 | |
| 14 | /** |
| 15 | * Matcher that matches a CSSFunction for a URL or a T_URL token |
| 16 | */ |
| 17 | class UrlMatcher extends FunctionMatcher { |
| 18 | /** @var callable|null */ |
| 19 | protected $urlCheck; |
| 20 | |
| 21 | /** |
| 22 | * @param callable|null $urlCheck Function to check that the URL is really valid. |
| 23 | * Prototype is bool func( string $url, ComponentValue[] $modifiers ) |
| 24 | * @param array $options Additional options: |
| 25 | * - modifierMatcher: (Matcher) Matcher for URL modifiers. The default is |
| 26 | * a NothingMatcher. |
| 27 | */ |
| 28 | public function __construct( callable $urlCheck = null, array $options = [] ) { |
| 29 | if ( isset( $options['modifierMatcher'] ) ) { |
| 30 | $modifierMatcher = $options['modifierMatcher']; |
| 31 | if ( !$modifierMatcher instanceof Matcher ) { |
| 32 | throw new InvalidArgumentException( 'modifierMatcher must be a Matcher' ); |
| 33 | } |
| 34 | } else { |
| 35 | $modifierMatcher = new NothingMatcher; |
| 36 | } |
| 37 | |
| 38 | $funcContents = new Juxtaposition( [ |
| 39 | TokenMatcher::create( Token::T_STRING )->capture( 'url' ), |
| 40 | Quantifier::star( $modifierMatcher->capture( 'modifier' ) ), |
| 41 | ] ); |
| 42 | |
| 43 | $this->urlCheck = $urlCheck; |
| 44 | parent::__construct( 'url', $funcContents ); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Return a Matcher for any grammatically-correct modifier |
| 49 | * @return Matcher |
| 50 | */ |
| 51 | public static function anyModifierMatcher() { |
| 52 | return Alternative::create( [ |
| 53 | new TokenMatcher( Token::T_IDENT ), |
| 54 | new FunctionMatcher( null, new AnythingMatcher( [ 'quantifier' => '*' ] ) ), |
| 55 | ] ); |
| 56 | } |
| 57 | |
| 58 | /** @inheritDoc */ |
| 59 | protected function generateMatches( ComponentValueList $values, $start, array $options ) { |
| 60 | // First, is it a URL token? |
| 61 | $cv = $values[$start] ?? null; |
| 62 | if ( $cv instanceof Token && $cv->type() === Token::T_URL ) { |
| 63 | $url = $cv->value(); |
| 64 | if ( !$this->urlCheck || call_user_func( $this->urlCheck, $url, [] ) ) { |
| 65 | $match = new GrammarMatch( $values, $start, 1, 'url' ); |
| 66 | yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ), $match ); |
| 67 | } |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | // Nope. Try it as a FunctionMatcher and extract the URL and modifiers |
| 72 | // for each match. |
| 73 | foreach ( parent::generateMatches( $values, $start, $options ) as $match ) { |
| 74 | $url = null; |
| 75 | $modifiers = []; |
| 76 | foreach ( $match->getCapturedMatches() as $submatch ) { |
| 77 | $cvs = $submatch->getValues(); |
| 78 | if ( $cvs[0] instanceof Token && $submatch->getName() === 'url' ) { |
| 79 | $url = $cvs[0]->value(); |
| 80 | } elseif ( $submatch->getName() === 'modifier' ) { |
| 81 | if ( $cvs[0] instanceof CSSFunction ) { |
| 82 | $modifiers[] = $cvs[0]; |
| 83 | } elseif ( $cvs[0] instanceof Token && $cvs[0]->type() === Token::T_IDENT ) { |
| 84 | $modifiers[] = $cvs[0]; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | if ( $url && ( !$this->urlCheck || call_user_func( $this->urlCheck, $url, $modifiers ) ) ) { |
| 89 | yield $match; |
| 90 | } |
| 91 | } |
| 92 | } |
| 93 | } |