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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/power_monitor/power_monitor_device_source.h"
#import <UIKit/UIKit.h>
#import "base/power_monitor/power_monitor_features.h"
namespace base {
PowerStateObserver::BatteryPowerStatus
PowerMonitorDeviceSource::GetBatteryPowerStatus() const {
#if TARGET_IPHONE_SIMULATOR
return PowerStateObserver::BatteryPowerStatus::kExternalPower;
#else
UIDevice* currentDevice = [UIDevice currentDevice];
BOOL isCurrentAppMonitoringBattery = currentDevice.isBatteryMonitoringEnabled;
[UIDevice currentDevice].batteryMonitoringEnabled = YES;
UIDeviceBatteryState batteryState = [UIDevice currentDevice].batteryState;
currentDevice.batteryMonitoringEnabled = isCurrentAppMonitoringBattery;
DCHECK(batteryState != UIDeviceBatteryStateUnknown);
return batteryState == UIDeviceBatteryStateUnplugged
? PowerStateObserver::BatteryPowerStatus::kBatteryPower
: PowerStateObserver::BatteryPowerStatus::kExternalPower;
#endif
}
void PowerMonitorDeviceSource::PlatformInit() {
if (FeatureList::IsEnabled(kRemoveIOSPowerEventNotifications)) {
return;
}
NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
id foreground =
[nc addObserverForName:UIApplicationWillEnterForegroundNotification
object:nil
queue:nil
usingBlock:^(NSNotification* notification) {
ProcessPowerEvent(RESUME_EVENT);
}];
id background =
[nc addObserverForName:UIApplicationDidEnterBackgroundNotification
object:nil
queue:nil
usingBlock:^(NSNotification* notification) {
ProcessPowerEvent(SUSPEND_EVENT);
}];
notification_observers_.push_back(foreground);
notification_observers_.push_back(background);
}
void PowerMonitorDeviceSource::PlatformDestroy() {
NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
for (std::vector<id>::iterator it = notification_observers_.begin();
it != notification_observers_.end(); ++it) {
[nc removeObserver:*it];
}
notification_observers_.clear();
}
} // namespace base
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