app/system_monitor_win.cc

   1 // Copyright (c) 2009 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 "app/system_monitor.h"
   6
   7 void SystemMonitor::ProcessWmPowerBroadcastMessage(int event_id) {
   8   PowerEvent power_event;
   9   switch (event_id) {
  10     case PBT_APMPOWERSTATUSCHANGE:  // The power status changed.
  11       power_event = POWER_STATE_EVENT;
  12       break;
  13     case PBT_APMRESUMEAUTOMATIC:  // Resume from suspend.
  14     //case PBT_APMRESUMESUSPEND:  // User-initiated resume from suspend.
  15                                   // We don't notify for this latter event
  16                                   // because if it occurs it is always sent as a
  17                                   // second event after PBT_APMRESUMEAUTOMATIC.
  18       power_event = RESUME_EVENT;
  19       break;
  20     case PBT_APMSUSPEND:  // System has been suspended.
  21       power_event = SUSPEND_EVENT;
  22       break;
  23     default:
  24       return;
  25
  26     // Other Power Events:
  27     // PBT_APMBATTERYLOW - removed in Vista.
  28     // PBT_APMOEMEVENT - removed in Vista.
  29     // PBT_APMQUERYSUSPEND - removed in Vista.
  30     // PBT_APMQUERYSUSPENDFAILED - removed in Vista.
  31     // PBT_APMRESUMECRITICAL - removed in Vista.
  32     // PBT_POWERSETTINGCHANGE - user changed the power settings.
  33   }
  34   ProcessPowerMessage(power_event);
  35 }
  36
  37 // Function to query the system to see if it is currently running on
  38 // battery power.  Returns true if running on battery.
  39 bool SystemMonitor::IsBatteryPower() {
  40   SYSTEM_POWER_STATUS status;
  41   if (!GetSystemPowerStatus(&status)) {
  42     LOG(ERROR) << "GetSystemPowerStatus failed: " << GetLastError();
  43     return false;
  44   }
  45   return (status.ACLineStatus == 0);
  46 }