content/browser/wake_lock/wake_lock_service_context.cc

   1 // Copyright 2015 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/wake_lock/wake_lock_service_context.h"
   6
   7 #include "base/bind.h"
   8 #include "content/browser/frame_host/frame_tree_node.h"
   9 #include "content/browser/frame_host/render_frame_host_impl.h"
  10 #include "content/browser/power_save_blocker_impl.h"
  11 #include "content/public/browser/browser_thread.h"
  12 #include "content/public/browser/power_save_blocker.h"
  13 #include "content/public/common/service_registry.h"
  14
  15 namespace content {
  16
  17 WakeLockServiceContext::WakeLockServiceContext(WebContents* web_contents)
  18     : WebContentsObserver(web_contents),
  19       weak_factory_(this) {
  20 }
  21
  22 WakeLockServiceContext::~WakeLockServiceContext() {
  23 }
  24
  25 void WakeLockServiceContext::CreateService(
  26     int frame_id,
  27     mojo::InterfaceRequest<WakeLockService> request) {
  28   new WakeLockServiceImpl(weak_factory_.GetWeakPtr(),
  29                           frame_id,
  30                           request.Pass());
  31 }
  32
  33 void WakeLockServiceContext::RenderFrameDeleted(
  34     RenderFrameHost* render_frame_host) {
  35   RenderFrameHostImpl* rfh_impl =
  36       static_cast<RenderFrameHostImpl*>(render_frame_host);
  37   CancelWakeLock(rfh_impl->frame_tree_node()->frame_tree_node_id());
  38 }
  39
  40 void WakeLockServiceContext::RequestWakeLock(int frame_id) {
  41   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  42   frames_requesting_lock_.insert(frame_id);
  43   UpdateWakeLock();
  44 }
  45
  46 void WakeLockServiceContext::CancelWakeLock(int frame_id) {
  47   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  48   frames_requesting_lock_.erase(frame_id);
  49   UpdateWakeLock();
  50 }
  51
  52 bool WakeLockServiceContext::HasWakeLockForTests() const {
  53   return wake_lock_;
  54 }
  55
  56 void WakeLockServiceContext::CreateWakeLock() {
  57   DCHECK(!wake_lock_);
  58   wake_lock_ = PowerSaveBlocker::Create(
  59       PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
  60       PowerSaveBlocker::kReasonOther,
  61       "Wake Lock API");
  62
  63   // On Android, additionaly associate the blocker with this WebContents.
  64 #if defined(OS_ANDROID)
  65   DCHECK(web_contents());
  66
  67   static_cast<PowerSaveBlockerImpl*>(wake_lock_.get())->InitDisplaySleepBlocker(
  68       web_contents());
  69 #endif
  70 }
  71
  72 void WakeLockServiceContext::RemoveWakeLock() {
  73   DCHECK(wake_lock_);
  74   wake_lock_.reset();
  75 }
  76
  77 void WakeLockServiceContext::UpdateWakeLock() {
  78   if (!frames_requesting_lock_.empty()) {
  79     if (!wake_lock_)
  80       CreateWakeLock();
  81   } else {
  82     if (wake_lock_)
  83       RemoveWakeLock();
  84   }
  85 }
  86
  87 }  // namespace content