1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 7 8 #include <list> 9 #include <set> 10 11 #include "base/basictypes.h" 12 #include "base/memory/singleton.h" 13 #include "content/common/content_export.h" 14 15 namespace content { 16 17 class CONTENT_EXPORT RendererFrameManagerClient { 18 public: 19 virtual ~RendererFrameManagerClient() {} 20 virtual void EvictCurrentFrame() = 0; 21 }; 22 23 class CONTENT_EXPORT RendererFrameManager { 24 public: 25 static RendererFrameManager* GetInstance(); 26 27 void AddFrame(RendererFrameManagerClient*, bool visible); 28 void RemoveFrame(RendererFrameManagerClient*); 29 void SetFrameVisibility(RendererFrameManagerClient*, bool visible); 30 31 size_t max_number_of_saved_frames() const { 32 return max_number_of_saved_frames_; 33 } 34 35 private: 36 RendererFrameManager(); 37 ~RendererFrameManager(); 38 void CullHiddenFrames(); 39 friend struct DefaultSingletonTraits<RendererFrameManager>; 40 41 std::set<RendererFrameManagerClient*> visible_frames_; 42 std::list<RendererFrameManagerClient*> hidden_frames_; 43 size_t max_number_of_saved_frames_; 44 45 DISALLOW_COPY_AND_ASSIGN(RendererFrameManager); 46 }; 47 48 } // namespace content 49 50 #endif // CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 51
