/**
  * Initialise a GeSHi object to format some code, performing
  * common setup for all our uses of it
  *
  * @param string $text
  * @param string $lang
  * @return GeSHi
  */
 public static function prepare($text, $lang)
 {
     global $wgTitle, $wgOut;
     self::initialise();
     $geshi = new GeSHi($text, $lang);
     if ($geshi->error() == GESHI_ERROR_NO_SUCH_LANG) {
         return null;
     }
     $geshi->set_encoding('UTF-8');
     $geshi->enable_classes();
     $geshi->set_overall_class("source-{$lang}");
     $geshi->enable_keyword_links(false);
     // Wikia change start
     if ($wgTitle instanceof Title && EditPageLayoutHelper::isCodeSyntaxHighlightingEnabled($wgTitle)) {
         $theme = 'solarized-light';
         if (SassUtil::isThemeDark()) {
             $theme = 'solarized-dark';
         }
         $geshi->set_language_path(GESHI_ROOT . $theme . DIRECTORY_SEPARATOR);
         $geshi->set_overall_id('theme-' . $theme);
         $wgOut->addStyle(AssetsManager::getInstance()->getSassCommonURL('extensions/SyntaxHighlight_GeSHi/styles/solarized.scss'));
     }
     // Wikia change end
     return $geshi;
 }