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