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// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/system_monitor.h"
namespace base {
SystemMonitor::SystemMonitor()
: battery_in_use_(IsBatteryPower()),
suspended_(false) {
}
void SystemMonitor::ProcessPowerMessage(PowerEvent event_id) {
// Suppress duplicate notifications. Some platforms may
// send multiple notifications of the same event.
switch (event_id) {
case PowerStateEvent:
{
bool on_battery = IsBatteryPower();
if (on_battery != battery_in_use_) {
battery_in_use_ = on_battery;
NotifyPowerStateChange();
}
}
break;
case ResumeEvent:
if (suspended_) {
suspended_ = false;
NotifyResume();
}
break;
case SuspendEvent:
if (!suspended_) {
suspended_ = true;
NotifySuspend();
}
break;
}
}
} // namespace base
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