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_DELEGATED_FRAME_EVICTOR_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_EVICTOR_H_ 7 8 #include "content/browser/renderer_host/renderer_frame_manager.h" 9 #include "content/common/content_export.h" 10 11 namespace content { 12 13 class CONTENT_EXPORT DelegatedFrameEvictorClient { 14 public: ~DelegatedFrameEvictorClient()15 virtual ~DelegatedFrameEvictorClient() {} 16 virtual void EvictDelegatedFrame() = 0; 17 }; 18 19 class CONTENT_EXPORT DelegatedFrameEvictor : public RendererFrameManagerClient { 20 public: 21 // |client| must outlive |this|. 22 explicit DelegatedFrameEvictor(DelegatedFrameEvictorClient* client); 23 virtual ~DelegatedFrameEvictor(); 24 25 void SwappedFrame(bool visible); 26 void DiscardedFrame(); 27 void SetVisible(bool visible); 28 void LockFrame(); 29 void UnlockFrame(); HasFrame()30 bool HasFrame() { return has_frame_; } 31 32 private: 33 // RendererFrameManagerClient implementation. 34 virtual void EvictCurrentFrame() OVERRIDE; 35 36 DelegatedFrameEvictorClient* client_; 37 bool has_frame_; 38 39 DISALLOW_COPY_AND_ASSIGN(DelegatedFrameEvictor); 40 }; 41 42 } // namespace content 43 44 #endif // CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_EVICTOR_H_ 45