kiosk_mode_idle_logout.cc revision 8bcbed890bc3ce4d7a057a8f32cab53fa534672e 
1// Copyright (c) 2012 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/kiosk_mode/kiosk_mode_idle_logout.h"
6
7#include "ash/shell.h"
8#include "ash/wm/user_activity_detector.h"
9#include "base/bind.h"
10#include "base/lazy_instance.h"
11#include "base/logging.h"
12#include "base/message_loop/message_loop.h"
13#include "chrome/browser/chrome_notification_types.h"
14#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
15#include "chrome/browser/chromeos/login/user_manager.h"
16#include "chrome/browser/chromeos/ui/idle_logout_dialog_view.h"
17#include "content/public/browser/notification_observer.h"
18#include "content/public/browser/notification_registrar.h"
19#include "content/public/browser/notification_service.h"
20
21namespace chromeos {
22
23namespace {
24
25static base::LazyInstance<KioskModeIdleLogout>
26    g_kiosk_mode_idle_logout = LAZY_INSTANCE_INITIALIZER;
27
28}  // namespace
29
30// static
31void KioskModeIdleLogout::Initialize() {
32  g_kiosk_mode_idle_logout.Get();
33}
34
35KioskModeIdleLogout::KioskModeIdleLogout() {
36  if (KioskModeSettings::Get()->is_initialized()) {
37    Setup();
38  } else {
39    KioskModeSettings::Get()->Initialize(base::Bind(&KioskModeIdleLogout::Setup,
40                                                    base::Unretained(this)));
41  }
42}
43
44KioskModeIdleLogout::~KioskModeIdleLogout() {
45  if (ash::Shell::HasInstance() &&
46      ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
47    ash::Shell::GetInstance()->user_activity_detector()->RemoveObserver(this);
48}
49
50void KioskModeIdleLogout::Setup() {
51  if (UserManager::Get()->IsLoggedInAsDemoUser()) {
52    // This means that we're recovering from a crash.  The user is already
53    // logged in, so go ahead and start the timer.
54    Start();
55  } else {
56    registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_CHANGED,
57                   content::NotificationService::AllSources());
58  }
59}
60
61void KioskModeIdleLogout::Observe(
62    int type,
63    const content::NotificationSource& source,
64    const content::NotificationDetails& details) {
65  if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
66    Start();
67    registrar_.RemoveAll();
68  }
69}
70
71void KioskModeIdleLogout::OnUserActivity(const ui::Event* event) {
72  IdleLogoutDialogView::CloseDialog();
73  ResetTimer();
74}
75
76void KioskModeIdleLogout::Start() {
77  if (!ash::Shell::GetInstance()->user_activity_detector()->HasObserver(this))
78    ash::Shell::GetInstance()->user_activity_detector()->AddObserver(this);
79  ResetTimer();
80}
81
82void KioskModeIdleLogout::ResetTimer() {
83  if (timer_.IsRunning()) {
84    timer_.Reset();
85  } else {
86    // OneShotTimer destroys the posted task after running it, so Reset()
87    // isn't safe to call on a timer that's already fired.
88    timer_.Start(FROM_HERE, KioskModeSettings::Get()->GetIdleLogoutTimeout(),
89                 base::Bind(&KioskModeIdleLogout::OnTimeout,
90                            base::Unretained(this)));
91  }
92}
93
94void KioskModeIdleLogout::OnTimeout() {
95  IdleLogoutDialogView::ShowDialog();
96}
97
98}  // namespace chromeos
99