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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 Wikimedia\CSS\Objects\ComponentValueList; |
10 | |
11 | /** |
12 | * Matcher that requires its sub-Matcher has only non-empty matches ("!" multiplier) |
13 | * @see https://www.w3.org/TR/2019/CR-css-values-3-20190606/#mult-req |
14 | */ |
15 | class NonEmpty extends Matcher { |
16 | /** @var Matcher */ |
17 | protected $matcher; |
18 | |
19 | /** |
20 | * @param Matcher $matcher |
21 | */ |
22 | public function __construct( Matcher $matcher ) { |
23 | $this->matcher = $matcher; |
24 | } |
25 | |
26 | /** @inheritDoc */ |
27 | protected function generateMatches( ComponentValueList $values, $start, array $options ) { |
28 | foreach ( $this->matcher->generateMatches( $values, $start, $options ) as $match ) { |
29 | if ( $match->getLength() !== 0 ) { |
30 | yield $this->makeMatch( $values, $start, $match->getNext(), $match ); |
31 | } |
32 | } |
33 | } |
34 | } |