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      1 // Copyright 2013 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/notifications/fullscreen_notification_blocker.h"
      6 
      7 #include "base/time/time.h"
      8 #include "chrome/browser/chrome_notification_types.h"
      9 #include "chrome/browser/fullscreen.h"
     10 #include "content/public/browser/notification_service.h"
     11 
     12 #if defined(USE_ASH)
     13 #include "ash/root_window_controller.h"
     14 #include "ash/shell.h"
     15 #include "ash/system/system_notifier.h"
     16 #include "ash/wm/window_state.h"
     17 #include "ui/aura/window.h"
     18 #include "ui/aura/window_event_dispatcher.h"
     19 #endif
     20 
     21 namespace {
     22 
     23 bool DoesFullscreenModeBlockNotifications() {
     24 #if defined(USE_ASH)
     25   if (ash::Shell::HasInstance()) {
     26     ash::RootWindowController* controller =
     27         ash::RootWindowController::ForTargetRootWindow();
     28 
     29     // During shutdown |controller| can be NULL.
     30     if (!controller)
     31       return false;
     32 
     33     // Block notifications if the shelf is hidden because of a fullscreen
     34     // window.
     35     const aura::Window* fullscreen_window =
     36         controller->GetWindowForFullscreenMode();
     37     if (!fullscreen_window)
     38       return false;
     39     return ash::wm::GetWindowState(fullscreen_window)->
     40         hide_shelf_when_fullscreen();
     41   }
     42 #endif
     43 
     44   return IsFullScreenMode();
     45 }
     46 
     47 }  // namespace
     48 
     49 FullscreenNotificationBlocker::FullscreenNotificationBlocker(
     50     message_center::MessageCenter* message_center)
     51     : NotificationBlocker(message_center),
     52       is_fullscreen_mode_(false) {
     53   registrar_.Add(this, chrome::NOTIFICATION_FULLSCREEN_CHANGED,
     54                  content::NotificationService::AllSources());
     55 }
     56 
     57 FullscreenNotificationBlocker::~FullscreenNotificationBlocker() {
     58 }
     59 
     60 void FullscreenNotificationBlocker::CheckState() {
     61   bool was_fullscreen_mode = is_fullscreen_mode_;
     62   is_fullscreen_mode_ = DoesFullscreenModeBlockNotifications();
     63   if (is_fullscreen_mode_ != was_fullscreen_mode)
     64     NotifyBlockingStateChanged();
     65 }
     66 
     67 bool FullscreenNotificationBlocker::ShouldShowNotificationAsPopup(
     68     const message_center::NotifierId& notifier_id) const {
     69   bool enabled = !is_fullscreen_mode_;
     70 #if defined(USE_ASH)
     71   if (ash::Shell::HasInstance())
     72     enabled = enabled || ash::system_notifier::ShouldAlwaysShowPopups(
     73         notifier_id);
     74 #endif
     75 
     76   return enabled;
     77 }
     78 
     79 void FullscreenNotificationBlocker::Observe(
     80     int type,
     81     const content::NotificationSource& source,
     82     const content::NotificationDetails& details) {
     83   DCHECK_EQ(chrome::NOTIFICATION_FULLSCREEN_CHANGED, type);
     84   CheckState();
     85 }
     86