wiki.techinc.nl/includes/resourceloader/ResourceLoaderEditToolbarModule.php

<?php
/**
 * ResourceLoader module for the edit toolbar.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * ResourceLoader module for the edit toolbar.
 *
 * @since 1.24
 */
class ResourceLoaderEditToolbarModule extends ResourceLoaderFileModule {
	/**
	 * Get language-specific LESS variables for this module.
	 *
	 * @since 1.27
	 * @param ResourceLoaderContext $context
	 * @return array
	 */
	protected function getLessVars( ResourceLoaderContext $context ) {
		$vars = parent::getLessVars( $context );
		$language = Language::factory( $context->getLanguage() );
		foreach ( $language->getImageFiles() as $key => $value ) {
			$vars[$key] = CSSMin::serializeStringValue( $value );
		}
		return $vars;
	}
}