Observes work area change and auto-hide for notifications.

ui/message_center/views/message_popup_collection.h

 // Copyright (c) 2013 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.
 
 #ifndef UI_MESSAGE_CENTER_VIEWS_MESSAGE_POPUP_COLLECTION_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_POPUP_COLLECTION_H_
 
 #include <list>
 #include <map>
 
@@ skipping 61 matching lines @@
   // not perform updates. It is used to wait for various animations and user
   // actions like serial closing of the toasts, when the remaining toasts "flow
   // under the mouse".
   void IncrementDeferCounter();
   void DecrementDeferCounter();
 
   // Runs the next step in update/animate sequence, if the defer counter is not
   // zero. Otherwise, simply waits when it becomes zero.
   void DoUpdateIfPossible();
 
+  // Updates |work_area_| and rearranges the notification toasts if necessary.
+  // This is separated from methods from OnDisplayBoundsChanged(), since
+  // sometimes a work area has to be specified directly. One example is shelf's
+  // auto-hide change. When the shelf in ChromeOS is temporarily shown from auto
+  // hide status, it doesn't change the display's work area but the actual work
+  // area for toasts should be resized.
+  void SetWorkArea(const gfx::Rect& work_area);
+
   // Overridden from gfx::DislayObserver:
   virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ash::WebNotificationTrayTest,
                            ManyPopupNotifications);
   friend class test::MessagePopupCollectionTest;
   friend class test::MessagePopupCollectionWidgetsTest;
@@ skipping 29 matching lines @@
   ToastContentsView* FindToast(const std::string& notification_id);
 
   // While the toasts are animated, avoid updating the collection, to reduce
   // user confusion. Instead, update the collection when all animations are
   // done. This method is run when defer counter is zero, may initiate next
   // update/animation step.
   void PerformDeferredTasks();
   void OnDeferTimerExpired();
 
   // "ForTest" methods.
-  void SetWorkAreaForTest(const gfx::Rect& work_area);
   views::Widget* GetWidgetForTest(const std::string& id);
   void RunLoopForTest();
   gfx::Rect GetToastRectAt(size_t index);
 
   gfx::NativeView parent_;
   MessageCenter* message_center_;
   MessageCenterTray* tray_;
   Toasts toasts_;
   gfx::Rect work_area_;
   int64 display_id_;
@@ skipping 17 matching lines @@
 
   // Weak, only exists temporarily in tests.
   scoped_ptr<base::RunLoop> run_loop_for_test_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePopupCollection);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_VIEWS_MESSAGE_POPUP_COLLECTION_H_