ash: Move ShelfWidget ownership to WmShelf and refactor access to it

ash/common/accelerators/accelerator_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/accelerators/accelerator_controller.h"
 
 #include "ash/common/accelerators/accelerator_commands.h"
 #include "ash/common/accelerators/accelerator_controller_delegate.h"
 #include "ash/common/accelerators/debug_commands.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/accessibility_types.h"
 #include "ash/common/focus_cycler.h"
 #include "ash/common/ime_control_delegate.h"
 #include "ash/common/media_delegate.h"
 #include "ash/common/multi_profile_uma.h"
 #include "ash/common/new_window_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_widget.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/system/brightness_control_delegate.h"
 #include "ash/common/system/keyboard_brightness_control_delegate.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/volume_control_delegate.h"
+#include "ash/common/system/web_notification/web_notification_tray.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
 #include "ash/common/wm/window_cycle_controller.h"
 #include "ash/common/wm/window_positioning_utils.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm_root_window_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 177 matching lines @@
 void HandleRestoreTab() {
   base::RecordAction(UserMetricsAction("Accel_Restore_Tab"));
   WmShell::Get()->new_window_delegate()->RestoreTab();
 }
 
 void HandleShowKeyboardOverlay() {
   base::RecordAction(UserMetricsAction("Accel_Show_Keyboard_Overlay"));
   WmShell::Get()->new_window_delegate()->ShowKeyboardOverlay();
 }
 
+bool CanHandleShowMessageCenterBubble() {
+  WmWindow* target_root = WmShell::Get()->GetRootWindowForNewWindows();
+  StatusAreaWidget* status_area_widget =
+      WmShelf::ForWindow(target_root)->shelf_widget()->status_area_widget();
+  return status_area_widget &&
+         status_area_widget->web_notification_tray()->visible();
+}
+
+void HandleShowMessageCenterBubble() {
+  base::RecordAction(UserMetricsAction("Accel_Show_Message_Center_Bubble"));
+  WmWindow* target_root = WmShell::Get()->GetRootWindowForNewWindows();
+  StatusAreaWidget* status_area_widget =
+      WmShelf::ForWindow(target_root)->shelf_widget()->status_area_widget();
+  if (status_area_widget) {
+    WebNotificationTray* notification_tray =
+        status_area_widget->web_notification_tray();
+    if (notification_tray->visible())
+      notification_tray->ShowMessageCenterBubble();
+  }
+}
+
 void HandleShowTaskManager() {
   base::RecordAction(UserMetricsAction("Accel_Show_Task_Manager"));
   WmShell::Get()->new_window_delegate()->ShowTaskManager();
 }
 
 bool CanHandleSwitchIme(ImeControlDelegate* ime_control_delegate,
                         const ui::Accelerator& accelerator) {
   return ime_control_delegate &&
          ime_control_delegate->CanSwitchIme(accelerator);
 }
@@ skipping 488 matching lines @@
     case DEBUG_PRINT_LAYER_HIERARCHY:
     case DEBUG_PRINT_VIEW_HIERARCHY:
     case DEBUG_PRINT_WINDOW_HIERARCHY:
       return debug::DebugAcceleratorsEnabled();
     case NEW_INCOGNITO_WINDOW:
       return CanHandleNewIncognitoWindow();
     case NEXT_IME:
       return CanHandleNextIme(ime_control_delegate_.get());
     case PREVIOUS_IME:
       return CanHandlePreviousIme(ime_control_delegate_.get());
+    case SHOW_MESSAGE_CENTER_BUBBLE:
+      return CanHandleShowMessageCenterBubble();
     case SWITCH_IME:
       return CanHandleSwitchIme(ime_control_delegate_.get(), accelerator);
     case TOGGLE_APP_LIST:
       return CanHandleToggleAppList(accelerator, previous_accelerator);
     case WINDOW_CYCLE_SNAP_DOCK_LEFT:
     case WINDOW_CYCLE_SNAP_DOCK_RIGHT:
       return CanHandleWindowSnapOrDock();
     case WINDOW_POSITION_CENTER:
       return CanHandlePositionCenter();
 #if defined(OS_CHROMEOS)
@@ skipping 161 matching lines @@
       break;
     case PRINT_UI_HIERARCHIES:
       debug::PrintUIHierarchies();
       break;
     case RESTORE_TAB:
       HandleRestoreTab();
       break;
     case SHOW_KEYBOARD_OVERLAY:
       HandleShowKeyboardOverlay();
       break;
+    case SHOW_MESSAGE_CENTER_BUBBLE:
+      HandleShowMessageCenterBubble();
+      break;
     case SHOW_TASK_MANAGER:
       HandleShowTaskManager();
       break;
     case SWITCH_IME:
       HandleSwitchIme(ime_control_delegate_.get(), accelerator);
       break;
     case TOGGLE_APP_LIST:
       HandleToggleAppList(accelerator);
       break;
     case TOGGLE_FULLSCREEN:
@@ skipping 153 matching lines @@
   if (wm_shell->mru_window_tracker()->BuildMruWindowList().empty() &&
       actions_needing_window_.find(action) != actions_needing_window_.end()) {
     wm_shell->accessibility_delegate()->TriggerAccessibilityAlert(
         A11Y_ALERT_WINDOW_NEEDED);
     return RESTRICTION_PREVENT_PROCESSING_AND_PROPAGATION;
   }
   return RESTRICTION_NONE;
 }
 
 }  // namespace ash