base/power_monitor/power_monitor_device_source_ios.mm

   1 // Copyright 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 #include "base/power_monitor/power_monitor_device_source.h"
   6
   7 #import <UIKit/UIKit.h>
   8
   9 namespace base {
  10
  11 void PowerMonitorDeviceSource::PlatformInit() {
  12   NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
  13   id foreground =
  14       [nc addObserverForName:UIApplicationWillEnterForegroundNotification
  15                       object:nil
  16                        queue:nil
  17                   usingBlock:^(NSNotification* notification) {
  18                       ProcessPowerEvent(RESUME_EVENT);
  19                   }];
  20   id background =
  21       [nc addObserverForName:UIApplicationDidEnterBackgroundNotification
  22                       object:nil
  23                        queue:nil
  24                   usingBlock:^(NSNotification* notification) {
  25                       ProcessPowerEvent(SUSPEND_EVENT);
  26                   }];
  27   notification_observers_.push_back(foreground);
  28   notification_observers_.push_back(background);
  29 }
  30
  31 void PowerMonitorDeviceSource::PlatformDestroy() {
  32   NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
  33   for (std::vector<id>::iterator it = notification_observers_.begin();
  34        it != notification_observers_.end(); ++it) {
  35     [nc removeObserver:*it];
  36   }
  37   notification_observers_.clear();
  38 }
  39
  40 }  // namespace base