content/browser/renderer_host/delegated_frame_evictor.cc

   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/delegated_frame_evictor.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace content {
  10
  11 DelegatedFrameEvictor::DelegatedFrameEvictor(
  12     DelegatedFrameEvictorClient* client)
  13     : client_(client), has_frame_(false), visible_(false) {
  14 }
  15
  16 DelegatedFrameEvictor::~DelegatedFrameEvictor() { DiscardedFrame(); }
  17
  18 void DelegatedFrameEvictor::SwappedFrame(bool visible) {
  19   visible_ = visible;
  20   has_frame_ = true;
  21   RendererFrameManager::GetInstance()->AddFrame(this, visible);
  22 }
  23
  24 void DelegatedFrameEvictor::DiscardedFrame() {
  25   RendererFrameManager::GetInstance()->RemoveFrame(this);
  26   has_frame_ = false;
  27 }
  28
  29 void DelegatedFrameEvictor::SetVisible(bool visible) {
  30   if (visible_ == visible)
  31     return;
  32   visible_ = visible;
  33   if (has_frame_) {
  34     if (visible) {
  35       LockFrame();
  36     } else {
  37       UnlockFrame();
  38     }
  39   }
  40 }
  41
  42 void DelegatedFrameEvictor::LockFrame() {
  43   DCHECK(has_frame_);
  44   RendererFrameManager::GetInstance()->LockFrame(this);
  45 }
  46
  47 void DelegatedFrameEvictor::UnlockFrame() {
  48   DCHECK(has_frame_);
  49   RendererFrameManager::GetInstance()->UnlockFrame(this);
  50 }
  51
  52 void DelegatedFrameEvictor::EvictCurrentFrame() {
  53   client_->EvictDelegatedFrame();
  54 }
  55
  56 }  // namespace content