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 #include "content/browser/renderer_host/renderer_frame_manager.h" 6 7 #include "base/logging.h" 8 #include "base/sys_info.h" 9 10 namespace content { 11 12 RendererFrameManager* RendererFrameManager::GetInstance() { 13 return Singleton<RendererFrameManager>::get(); 14 } 15 16 void RendererFrameManager::AddFrame(RendererFrameManagerClient* frame, 17 bool visible) { 18 RemoveFrame(frame); 19 if (visible) 20 visible_frames_.insert(frame); 21 else 22 hidden_frames_.push_front(frame); 23 CullHiddenFrames(); 24 } 25 26 void RendererFrameManager::RemoveFrame(RendererFrameManagerClient* frame) { 27 visible_frames_.erase(frame); 28 hidden_frames_.remove(frame); 29 } 30 31 void RendererFrameManager::SetFrameVisibility(RendererFrameManagerClient* frame, 32 bool visible) { 33 if (visible) { 34 hidden_frames_.remove(frame); 35 visible_frames_.insert(frame); 36 } else { 37 visible_frames_.erase(frame); 38 hidden_frames_.push_front(frame); 39 CullHiddenFrames(); 40 } 41 } 42 43 RendererFrameManager::RendererFrameManager() 44 : max_number_of_saved_frames_( 45 std::min(5, 2 + (base::SysInfo::AmountOfPhysicalMemoryMB() / 256))) {} 46 47 RendererFrameManager::~RendererFrameManager() {} 48 49 void RendererFrameManager::CullHiddenFrames() { 50 while (!hidden_frames_.empty() && 51 hidden_frames_.size() + visible_frames_.size() > 52 max_number_of_saved_frames()) { 53 size_t old_size = hidden_frames_.size(); 54 // Should remove self from list. 55 hidden_frames_.back()->EvictCurrentFrame(); 56 DCHECK_EQ(hidden_frames_.size() + 1, old_size); 57 } 58 } 59 60 } // namespace content 61
