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52 lines
1.5 KiB
PHP
52 lines
1.5 KiB
PHP
<?php
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/**
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* @file
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* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
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*/
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namespace Wikimedia\CSS\Grammar;
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use Wikimedia\CSS\Objects\ComponentValueList;
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use Wikimedia\CSS\Objects\Token;
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/**
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* Matcher that matches one of a set of keywords, case-insensitively
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*
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* This is intended for matching specific <ident-token>s, but will work for
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* other types (case-insensitively) too. For delimiter (or case-sensitive)
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* matching, use DelimMatcher.
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*
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* @see https://www.w3.org/TR/2019/CR-css-values-3-20190606/#component-types
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*/
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class KeywordMatcher extends Matcher {
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/** @var string One of the Token::T_* constants */
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protected $type;
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/** @var array Associative array with keys being the values to match */
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protected $values;
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/**
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* @param string|string[] $values Token values to match
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* @param array $options Options
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* - type: (string) Token type to match. Default is Token::T_IDENT.
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*/
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public function __construct( $values, array $options = [] ) {
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$options += [
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'type' => Token::T_IDENT,
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];
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$this->values = array_flip( array_map( 'strtolower', (array)$values ) );
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$this->type = $options['type'];
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}
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/** @inheritDoc */
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protected function generateMatches( ComponentValueList $values, $start, array $options ) {
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$cv = $values[$start] ?? null;
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if ( $cv instanceof Token && $cv->type() === $this->type &&
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isset( $this->values[strtolower( $cv->value() )] )
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) {
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yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ) );
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}
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}
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}
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