Menubar.View = function ( editor ) { var menuConfig, optionsPanel, createOption, createDivider; function onLightThemeOptionClick () { editor.setTheme( 'css/light.css' ); editor.config.setKey( 'theme', 'css/light.css' ); } function onDarkThemeOptionClick () { editor.setTheme( 'css/dark.css' ); editor.config.setKey( 'theme', 'css/dark.css' ); } // configure menu contents createOption = UI.MenubarHelper.createOption; createDivider = UI.MenubarHelper.createDivider; menuConfig = [ createOption( 'Light theme', onLightThemeOptionClick ), createOption( 'Dark theme', onDarkThemeOptionClick ) ]; optionsPanel = UI.MenubarHelper.createOptionsPanel( menuConfig ); return UI.MenubarHelper.createMenuContainer( 'View', optionsPanel ); }