+<?php
+/**
+ * Resource loader 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 {
+ /**
+ * Serialize a string (escape and quote) for use as a CSS string value.
+ * http://www.w3.org/TR/2013/WD-cssom-20131205/#serialize-a-string
+ *
+ * @param string $value
+ * @return string
+ */
+ private static function cssSerializeString( $value ) {
+ if ( strstr( $value, "\0" ) ) {
+ throw new Exception( "Invalid character in CSS string" );
+ }
+ $value = strtr( $value, array( '\\' => '\\\\', '"' => '\\"' ) );
+ $value = preg_replace_callback( '/[\x01-\x1f\x7f-\x9f]/', function ( $match ) {
+ return '\\' . base_convert( ord( $match[0] ), 10, 16 ) . ' ';
+ }, $value );
+ return '"' . $value . '"';
+ }
+
+ /**
+ * Get language-specific LESS variables for this module.
+ *
+ * @return array
+ */
+ private function getLessVars( ResourceLoaderContext $context ) {
+ $language = Language::factory( $context->getLanguage() );
+
+ // This is very conveniently formatted and we can pass it right through
+ $vars = $language->getImageFiles();
+
+ // lessc tries to be helpful and parse our variables as LESS source code
+ foreach ( $vars as $key => &$value ) {
+ $value = self::cssSerializeString( $value );
+ }
+
+ return $vars;
+ }
+
+ /**
+ * @param ResourceLoaderContext $context
+ * @return int UNIX timestamp
+ */
+ public function getModifiedTime( ResourceLoaderContext $context ) {
+ return max(
+ parent::getModifiedTime( $context ),
+ $this->getHashMtime( $context )
+ );
+ }
+
+ /**
+ * @param ResourceLoaderContext $context
+ * @return string Hash
+ */
+ public function getModifiedHash( ResourceLoaderContext $context ) {
+ return md5(
+ parent::getModifiedHash( $context ) .
+ serialize( $this->getLessVars( $context ) )
+ );
+ }
+
+ /**
+ * Get a LESS compiler instance for this module.
+ *
+ * Set our variables in it.
+ *
+ * @throws MWException
+ * @param ResourceLoaderContext $context
+ * @return lessc
+ */
+ protected function getLessCompiler( ResourceLoaderContext $context ) {
+ $compiler = parent::getLessCompiler();
+ $compiler->setVariables( $this->getLessVars( $context ) );
+ return $compiler;
+ }
+}