4 * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
7 namespace Wikimedia\CSS\Grammar;
9 use Wikimedia\CSS\Objects\ComponentValueList;
10 use Wikimedia\CSS\Objects\Token;
13 * Matcher that matches one of a set of keywords, case-insensitively
15 * This is intended for matching specific <ident-token>s, but will work for
16 * other types (case-insensitively) too. For delimiter (or case-sensitive)
17 * matching, use DelimMatcher.
19 * @see https://www.w3.org/TR/2016/CR-css-values-3-20160929/#component-types
21 class KeywordMatcher extends Matcher {
22 /** @var string One of the Token::T_* constants */
25 /** @var array Associative array with keys being the values to match */
29 * @param string|string[] $values Token values to match
30 * @param array $options Options
31 * - type: (string) Token type to match. Default is Token::T_IDENT.
33 public function __construct( $values, array $options = [] ) {
35 'type' => Token::T_IDENT,
38 $this->values = array_flip( array_map( 'strtolower', (array)$values ) );
39 $this->type = $options['type'];
42 protected function generateMatches( ComponentValueList $values, $start, array $options ) {
43 $cv = isset( $values[$start] ) ? $values[$start] : null;
44 if ( $cv instanceof Token && $cv->type() === $this->type &&
45 isset( $this->values[strtolower( $cv->value() )] )
47 yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ) );