text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_
  #define UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_
  
  #include <windows.h>
  
  #include <map>
  
  #include "base/basictypes.h"
  #include "ui/views/views_export.h"
  
  namespace views {
  
  // Scoping class that ensures a HWND remains hidden while it enters or leaves
  // the fullscreen state. This reduces some flicker-jank that an application UI
  // might suffer.
  class VIEWS_EXPORT ScopedFullscreenVisibility {
   public:
    explicit ScopedFullscreenVisibility(HWND hwnd);
    ~ScopedFullscreenVisibility();
  
    // Returns true if |hwnd| is currently hidden due to instance(s) of this
    // class.
    static bool IsHiddenForFullscreen(HWND hwnd);
  
   private:
    typedef std::map<HWND, int> FullscreenHWNDs;
  
    HWND hwnd_;
  
    static FullscreenHWNDs* full_screen_windows_;
  
    DISALLOW_COPY_AND_ASSIGN(ScopedFullscreenVisibility);
  };
  
  }  // namespace views
  
  #endif  // UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_
  