Revert "Remove aura and make a pure mojo::View version of the aura::Window FocusController."

mojo/services/window_manager/focus_controller.h

-// Copyright 2014 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 MOJO_SERIVCES_WINDOW_MANAGER_FOCUS_CONTROLLER_H_
-#define MOJO_SERIVCES_WINDOW_MANAGER_FOCUS_CONTROLLER_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/observer_list.h"
-#include "base/scoped_observer.h"
-#include "mojo/services/public/cpp/view_manager/view_observer.h"
-#include "ui/events/event_handler.h"
-
-namespace mojo {
-
-class FocusControllerObserver;
-class FocusRules;
-
-// FocusController handles focus and activation changes in a mojo window
-// manager. Within the window manager, there can only be one focused and one
-// active window at a time. When focus or activation changes, notifications are
-// sent using the FocusControllerObserver interface.
-class FocusController : public ui::EventHandler,
-                        public ViewObserver {
- public:
-  // |rules| cannot be null.
-  explicit FocusController(scoped_ptr<FocusRules> rules);
-  virtual ~FocusController();
-
-  void AddObserver(FocusControllerObserver* observer);
-  void RemoveObserver(FocusControllerObserver* observer);
-
-  void ActivateView(View* view);
-  void DeactivateView(View* view);
-  View* GetActiveView();
-  View* GetActivatableView(View* view);
-  View* GetToplevelView(View* view);
-  bool CanActivateView(View* view) const;
-
-  void FocusView(View* view);
-
-  void ResetFocusWithinActiveView(View* view);
-  View* GetFocusedView();
-
-  // Overridden from ui::EventHandler:
-  void OnKeyEvent(ui::KeyEvent* event) override;
-  void OnMouseEvent(ui::MouseEvent* event) override;
-  void OnScrollEvent(ui::ScrollEvent* event) override;
-  void OnTouchEvent(ui::TouchEvent* event) override;
-  void OnGestureEvent(ui::GestureEvent* event) override;
-
-  // Overridden from ViewObserver:
-  void OnTreeChanging(const TreeChangeParams& params) override;
-  void OnTreeChanged(const TreeChangeParams& params) override;
-  void OnViewVisibilityChanged(View* view) override;
-  void OnViewDestroying(View* view) override;
-
- private:
-  // Internal implementation that sets the focused view, fires events etc.
-  // This function must be called with a valid focusable view.
-  void SetFocusedView(View* view);
-
-  // Internal implementation that sets the active window, fires events etc.
-  // This function must be called with a valid |activatable_window|.
-  // |requested window| refers to the window that was passed in to an external
-  // request (e.g. FocusWindow or ActivateWindow). It may be null, e.g. if
-  // SetActiveWindow was not called by an external request. |activatable_window|
-  // refers to the actual window to be activated, which may be different.
-  void SetActiveView(View* requested_view,
-                     View* activatable_view);
-
-  // Called when a window's disposition changed such that it and its hierarchy
-  // are no longer focusable/activatable. |next| is a valid window that is used
-  // as a starting point for finding a window to focus next based on rules.
-  void ViewLostFocusFromDispositionChange(View* view, View* next);
-
-  // Called when an attempt is made to focus or activate a window via an input
-  // event targeted at that window. Rules determine the best focusable window
-  // for the input window.
-  void ViewFocusedFromInputEvent(View* view);
-
-  View* active_view_;
-  View* focused_view_;
-
-  bool updating_focus_;
-  bool updating_activation_;
-
-  scoped_ptr<FocusRules> rules_;
-
-  ObserverList<FocusControllerObserver> focus_controller_observers_;
-
-  ScopedObserver<View, ViewObserver> observer_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(FocusController);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_SERIVCES_WINDOW_MANAGER_FOCUS_CONTROLLER_H_