chromium/chrome/browser/ui/exclusive_access/fullscreen_within_tab_helper.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_WITHIN_TAB_HELPER_H_
#define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_WITHIN_TAB_HELPER_H_

#include "content/public/browser/web_contents_user_data.h"

// Helper used by FullscreenController to track the state of a WebContents that
// is in fullscreen mode, but the browser window is not. See
// 'FullscreenWithinTab Note' in fullscreen_controller.h.
//
// The purpose of this class is to associate some fullscreen state at the tab
// level rather than at the Browser level. This allows tabs to be
// dragged/dropped between Browsers and have their fullscreen state handed off
// between FullscreenControllers as well.
//
// FullscreenWithinTabHelper is created on-demand, and its lifecycle is tied to
// that of its associated WebContents. It is automatically destroyed.
class FullscreenWithinTabHelper
    : public content::WebContentsUserData<FullscreenWithinTabHelper> { … };

#endif  // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_WITHIN_TAB_HELPER_H_