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      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 "ash/system/chromeos/session/logout_confirmation_controller.h"
      6 
      7 #include "ash/session/session_state_delegate.h"
      8 #include "ash/shell.h"
      9 #include "ash/system/chromeos/session/logout_confirmation_dialog.h"
     10 #include "base/location.h"
     11 #include "base/time/default_tick_clock.h"
     12 #include "base/time/tick_clock.h"
     13 #include "ui/views/widget/widget.h"
     14 
     15 namespace ash {
     16 
     17 LogoutConfirmationController::LogoutConfirmationController(
     18     const base::Closure& logout_closure)
     19     : clock_(new base::DefaultTickClock),
     20       logout_closure_(logout_closure),
     21       dialog_(NULL),
     22       logout_timer_(false, false) {
     23   if (Shell::HasInstance())
     24     Shell::GetInstance()->AddShellObserver(this);
     25 }
     26 
     27 LogoutConfirmationController::~LogoutConfirmationController() {
     28   if (Shell::HasInstance())
     29     Shell::GetInstance()->RemoveShellObserver(this);
     30   if (dialog_)
     31     dialog_->GetWidget()->Close();
     32 }
     33 
     34 void LogoutConfirmationController::ConfirmLogout(
     35     base::TimeTicks logout_time) {
     36   if (!logout_time_.is_null() && logout_time >= logout_time_) {
     37     // If a confirmation dialog is already being shown and its countdown expires
     38     // no later than the |logout_time| requested now, keep the current dialog
     39     // open.
     40     return;
     41   }
     42   logout_time_ = logout_time;
     43 
     44   if (!dialog_) {
     45     // Show confirmation dialog unless this is a unit test without a Shell.
     46     if (Shell::HasInstance())
     47       dialog_ = new LogoutConfirmationDialog(this, logout_time_);
     48   } else {
     49     dialog_->Update(logout_time_);
     50   }
     51 
     52   logout_timer_.Start(FROM_HERE,
     53                       logout_time_ - clock_->NowTicks(),
     54                       logout_closure_);
     55 }
     56 
     57 void LogoutConfirmationController::SetClockForTesting(
     58     scoped_ptr<base::TickClock> clock) {
     59   clock_ = clock.Pass();
     60 }
     61 
     62 void LogoutConfirmationController::OnLockStateChanged(bool locked) {
     63   if (!locked || logout_time_.is_null())
     64     return;
     65 
     66   // If the screen is locked while a confirmation dialog is being shown, close
     67   // the dialog.
     68   logout_time_ = base::TimeTicks();
     69   if (dialog_)
     70     dialog_->GetWidget()->Close();
     71   logout_timer_.Stop();
     72 }
     73 
     74 void LogoutConfirmationController::OnLogoutConfirmed() {
     75   logout_timer_.Stop();
     76   logout_closure_.Run();
     77 }
     78 
     79 void LogoutConfirmationController::OnDialogClosed() {
     80   logout_time_ = base::TimeTicks();
     81   dialog_ = NULL;
     82   logout_timer_.Stop();
     83 }
     84 
     85 }  // namespace ash
     86