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#ifndef ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_
6#define ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_
7
8#include "ash/ash_export.h"
9#include "ash/shell_observer.h"
10#include "base/basictypes.h"
11#include "base/callback.h"
12#include "base/memory/scoped_ptr.h"
13#include "base/time/time.h"
14#include "base/timer/timer.h"
15
16namespace base {
17class TickClock;
18}
19
20namespace ash {
21
22class LogoutConfirmationDialog;
23
24// This class shows a dialog asking the user to confirm or deny logout and
25// terminates the session if the user either confirms or allows the countdown
26// shown in the dialog to expire.
27// It is guaranteed that no more than one confirmation dialog will be visible at
28// any given time. If there are multiple requests to show a confirmation dialog
29// at the same time, the dialog whose countdown expires first is shown.
30class ASH_EXPORT LogoutConfirmationController : public ShellObserver {
31 public:
32  // The |logout_closure| must be safe to call as long as |this| is alive.
33  explicit LogoutConfirmationController(const base::Closure& logout_closure);
34  virtual ~LogoutConfirmationController();
35
36  base::TickClock* clock() const { return clock_.get(); }
37
38  // Shows a LogoutConfirmationDialog. If a confirmation dialog is already being
39  // shown, it is closed and a new one opened if |logout_time| is earlier than
40  // the current dialog's |logout_time_|.
41  void ConfirmLogout(base::TimeTicks logout_time);
42
43  void SetClockForTesting(scoped_ptr<base::TickClock> clock);
44
45  // ShellObserver:
46  virtual void OnLockStateChanged(bool locked) OVERRIDE;
47
48  // Called by the |dialog_| when the user confirms logout.
49  void OnLogoutConfirmed();
50
51  // Called by the |dialog_| when it is closed.
52  void OnDialogClosed();
53
54  LogoutConfirmationDialog* dialog_for_testing() const { return dialog_; }
55
56 private:
57  scoped_ptr<base::TickClock> clock_;
58  base::Closure logout_closure_;
59
60  base::TimeTicks logout_time_;
61  LogoutConfirmationDialog* dialog_;  // Owned by the Views hierarchy.
62  base::Timer logout_timer_;
63
64  DISALLOW_COPY_AND_ASSIGN(LogoutConfirmationController);
65};
66
67}  // namespace ash
68
69#endif  // ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_
70