chrome/browser/notifications/fullscreen_notification_blocker.cc

   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 }