Piwik\Plugin\Manager::getThemeEnabled PHP Method

    public function getThemeEnabled()
    {
        $plugins = $this->getLoadedPlugins();
        $theme = false;
        foreach ($plugins as $plugin) {
            /* @var $plugin Plugin */
            if ($plugin->isTheme() && $this->isPluginActivated($plugin->getPluginName())) {
                if ($plugin->getPluginName() != self::DEFAULT_THEME) {
                    return $plugin;
                    // enabled theme (not default)
                }
                $theme = $plugin;
                // default theme
            }
        }
        return $theme;
    }

 private function createPluginsOrThemesView($template, $themesOnly)
 {
     Piwik::checkUserHasSuperUserAccess();
     $view = $this->configureView('@CorePluginsAdmin/' . $template);
     $view->updateNonce = Nonce::getNonce(MarketplaceController::UPDATE_NONCE);
     $view->activateNonce = Nonce::getNonce(static::ACTIVATE_NONCE);
     $view->uninstallNonce = Nonce::getNonce(static::UNINSTALL_NONCE);
     $view->deactivateNonce = Nonce::getNonce(static::DEACTIVATE_NONCE);
     $view->pluginsInfo = $this->getPluginsInfo($themesOnly);
     $users = Request::processRequest('UsersManager.getUsers');
     $view->otherUsersCount = count($users) - 1;
     $view->themeEnabled = $this->pluginManager->getThemeEnabled()->getPluginName();
     $view->pluginNamesHavingSettings = array_keys($this->settingsProvider->getAllSystemSettings());
     $view->isMarketplaceEnabled = Marketplace::isMarketplaceEnabled();
     $view->isPluginsAdminEnabled = CorePluginsAdmin::isPluginsAdminEnabled();
     $view->pluginsHavingUpdate = array();
     $view->marketplacePluginNames = array();
     if (Marketplace::isMarketplaceEnabled() && $this->marketplacePlugins) {
         try {
             $view->marketplacePluginNames = $this->marketplacePlugins->getAvailablePluginNames($themesOnly);
             $view->pluginsHavingUpdate = $this->marketplacePlugins->getPluginsHavingUpdate();
         } catch (Exception $e) {
             // curl exec connection error (ie. server not connected to internet)
         }
     }
     return $view;
 }