MediaWiki 1.30.2

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

diff --git a/vendor/wikimedia/css-sanitizer/src/Grammar/TokenMatcher.php b/vendor/wikimedia/css-sanitizer/src/Grammar/TokenMatcher.php
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+++ b/vendor/wikimedia/css-sanitizer/src/Grammar/TokenMatcher.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 a token of a particular type
+ * @see https://www.w3.org/TR/2016/CR-css-values-3-20160929/#component-types
+ */
+class TokenMatcher extends Matcher {
+       /** @var string One of the Token::T_* constants */
+       protected $type;
+
+       /** @var callable|null Something to call to further validate the token */
+       protected $callback = null;
+
+       /**
+        * @param string $type Token type to match
+        * @param callable|null $callback Something to call to further validate the token.
+        *  bool callback( Token )
+        */
+       public function __construct( $type, callable $callback = null ) {
+               $this->type = $type;
+               $this->callback = $callback;
+       }
+
+       protected function generateMatches( ComponentValueList $values, $start, array $options ) {
+               $cv = isset( $values[$start] ) ? $values[$start] : null;
+               if ( $cv instanceof Token && $cv->type() === $this->type &&
+                       ( !$this->callback || call_user_func( $this->callback, $cv ) )
+               ) {
+                       yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ) );
+               }
+       }
+}