X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/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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+<?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 ) );
+		}
+	}
+}