content/child/power_monitor_broadcast_source.h

   1 // Copyright (c) 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_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
   6 #define CONTENT_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
   7
   8 #include "base/power_monitor/power_monitor_source.h"
   9 #include "content/common/content_export.h"
  10 #include "ipc/ipc_channel.h"
  11
  12 namespace IPC {
  13 class MessageFilter;
  14 }
  15
  16 namespace content {
  17
  18 class PowerMessageFilter;
  19
  20 // Receives Power Monitor IPC messages sent from the browser process and relays
  21 // them to the PowerMonitor of the current process.
  22 class CONTENT_EXPORT PowerMonitorBroadcastSource :
  23     public base::PowerMonitorSource {
  24  public:
  25   explicit PowerMonitorBroadcastSource();
  26   virtual ~PowerMonitorBroadcastSource();
  27
  28   IPC::MessageFilter* GetMessageFilter();
  29
  30  private:
  31   friend class PowerMessageFilter;
  32
  33   virtual bool IsOnBatteryPowerImpl() OVERRIDE;
  34
  35   void OnPowerStateChange(bool on_battery_power);
  36   void OnSuspend();
  37   void OnResume();
  38
  39   bool last_reported_battery_power_state_;
  40   scoped_refptr<PowerMessageFilter> message_filter_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(PowerMonitorBroadcastSource);
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_CHILD_POWER_MONITOR_MESSAGE_FILTER_H_