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
12namespace chromeos {
13
14IdleDetector::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
18IdleDetector::~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
24void IdleDetector::OnUserActivity(const ui::Event* event) {
25  if (!active_callback_.is_null())
26    active_callback_.Run();
27  ResetTimer();
28}
29
30void 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
37void IdleDetector::ResetTimer() {
38  if (timer_.IsRunning())
39    timer_.Reset();
40  else
41    timer_.Start(FROM_HERE, timeout_, idle_callback_);
42}
43
44}  // namespace chromeos
45