MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / vendor / wikimedia / css-sanitizer / src / Grammar / KeywordMatcher.php

diff --git a/vendor/wikimedia/css-sanitizer/src/Grammar/KeywordMatcher.php b/vendor/wikimedia/css-sanitizer/src/Grammar/KeywordMatcher.php
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+<?php
+/**
+ * @file
+ * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
+ */
+
+namespace Wikimedia\CSS\Grammar;
+
+use Wikimedia\CSS\Objects\ComponentValueList;
+use Wikimedia\CSS\Objects\Token;
+
+/**
+ * Matcher that matches one of a set of keywords, case-insensitively
+ *
+ * This is intended for matching specific <ident-token>s, but will work for
+ * other types (case-insensitively) too. For delimiter (or case-sensitive)
+ * matching, use DelimMatcher.
+ *
+ * @see https://www.w3.org/TR/2016/CR-css-values-3-20160929/#component-types
+ */
+class KeywordMatcher extends Matcher {
+       /** @var string One of the Token::T_* constants */
+       protected $type;
+
+       /** @var array Associative array with keys being the values to match */
+       protected $values;
+
+       /**
+        * @param string|string[] $values Token values to match
+        * @param array $options Options
+        *  - type: (string) Token type to match. Default is Token::T_IDENT.
+        */
+       public function __construct( $values, array $options = [] ) {
+               $options += [
+                       'type' => Token::T_IDENT,
+               ];
+
+               $this->values = array_flip( array_map( 'strtolower', (array)$values ) );
+               $this->type = $options['type'];
+       }
+
+       protected function generateMatches( ComponentValueList $values, $start, array $options ) {
+               $cv = isset( $values[$start] ) ? $values[$start] : null;
+               if ( $cv instanceof Token && $cv->type() === $this->type &&
+                       isset( $this->values[strtolower( $cv->value() )] )
+               ) {
+                       yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ) );
+               }
+       }
+}