chrome/browser/chromeos/idle_detector.cc

   1 // Copyright 2014 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 "chrome/browser/chromeos/idle_detector.h"
   6
   7 #include "ash/shell.h"
   8 #include "base/bind.h"
   9 #include "base/logging.h"
  10 #include "ui/wm/core/user_activity_detector.h"
  11
  12 namespace chromeos {
  13
  14 IdleDetector::IdleDetector(const base::Closure& on_active_callback,
  15                            const base::Closure& on_idle_callback)
  16     : active_callback_(on_active_callback), idle_callback_(on_idle_callback) {}
  17
  18 IdleDetector::~IdleDetector() {
  19   if (ash::Shell::HasInstance() &&
  20       ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
  21     ash::Shell::GetInstance()->user_activity_detector()->RemoveObserver(this);
  22 }
  23
  24 void IdleDetector::OnUserActivity(const ui::Event* event) {
  25   if (!active_callback_.is_null())
  26     active_callback_.Run();
  27   ResetTimer();
  28 }
  29
  30 void IdleDetector::Start(const base::TimeDelta& timeout) {
  31   timeout_ = timeout;
  32   if (!ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
  33     ash::Shell::GetInstance()->user_activity_detector()->AddObserver(this);
  34   ResetTimer();
  35 }
  36
  37 void IdleDetector::ResetTimer() {
  38   if (timer_.IsRunning())
  39     timer_.Reset();
  40   else
  41     timer_.Start(FROM_HERE, timeout_, idle_callback_);
  42 }
  43
  44 }  // namespace chromeos