TemplateStylesFontFaceAtRuleSanitizer.php
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TemplateStylesFontFaceAtRuleSanitizer.php
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	<?php

	namespace MediaWiki\Extension\TemplateStyles;

	/**
	* @file
	* @license GPL-2.0-or-later
	*/

	use Wikimedia\CSS\Grammar\Alternative;
	use Wikimedia\CSS\Grammar\Juxtaposition;
	use Wikimedia\CSS\Grammar\MatcherFactory;
	use Wikimedia\CSS\Grammar\Quantifier;
	use Wikimedia\CSS\Grammar\TokenMatcher;
	use Wikimedia\CSS\Objects\Token;
	use Wikimedia\CSS\Sanitizer\FontFaceAtRuleSanitizer;

	/**
	* Extend the standard `@font-face` matcher to require a prefix on families.
	*/
	class TemplateStylesFontFaceAtRuleSanitizer extends FontFaceAtRuleSanitizer {

	/**
	* @param MatcherFactory $matcherFactory
	*/
	public function __construct( MatcherFactory $matcherFactory ) {
	parent::__construct( $matcherFactory );

	// Only allow the font-family if it begins with "TemplateStyles"
	$this->propertySanitizer->setKnownProperties( [
	'font-family' => new Alternative( [
	new TokenMatcher( Token::T_STRING, static function ( Token $t ) {
	return substr( $t->value(), 0, 14 ) === 'TemplateStyles';
	} ),
	new Juxtaposition( [
	new TokenMatcher( Token::T_IDENT, static function ( Token $t ) {
	return substr( $t->value(), 0, 14 ) === 'TemplateStyles';
	} ),
	Quantifier::star( $matcherFactory->ident() ),
	] ),
	] ),
	] + $this->propertySanitizer->getKnownProperties() );
	}
	}