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<?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
* @throws Exception
*/
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 = null ) {
$compiler = parent::getLessCompiler();
$compiler->setVariables( $this->getLessVars( $context ) );
return $compiler;
}
}
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