Move some more WM functionality down into ash.

ui/aura_shell/root_window_event_filter.h

-// Copyright (c) 2011 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_AURA_SHELL_ROOT_WINDOW_EVENT_FILTER_H_
-#define UI_AURA_SHELL_ROOT_WINDOW_EVENT_FILTER_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "base/observer_list.h"
-#include "ui/aura/event.h"
-#include "ui/aura/event_filter.h"
-#include "ui/aura_shell/aura_shell_export.h"
-
-namespace aura_shell {
-namespace internal {
-
-// RootWindowEventFilter gets all root window events first and can provide
-// actions to those events. It implements root window features such as click to
-// activate a window and cursor change when moving mouse.
-// Additional event filters can be added to RootWIndowEventFilter. Events will
-// pass through those additional filters in their addition order and could be
-// consumed by any of those filters. If an event is consumed by a filter, the
-// rest of the filter(s) and RootWindowEventFilter will not see the consumed
-// event.
-class AURA_SHELL_EXPORT RootWindowEventFilter : public aura::EventFilter {
- public:
-  RootWindowEventFilter();
-  virtual ~RootWindowEventFilter();
-
-  // Adds/removes additional event filters.
-  void AddFilter(aura::EventFilter* filter);
-  void RemoveFilter(aura::EventFilter* filter);
-
-  // Overridden from EventFilter:
-  virtual bool PreHandleKeyEvent(aura::Window* target,
-                                 aura::KeyEvent* event) OVERRIDE;
-  virtual bool PreHandleMouseEvent(aura::Window* target,
-                                   aura::MouseEvent* event) OVERRIDE;
-  virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
-                                              aura::TouchEvent* event) OVERRIDE;
-
- private:
-  // Updates the cursor if the target provides a custom one, and provides
-  // default resize cursors for window edges.
-  void UpdateCursor(aura::Window* target, aura::MouseEvent* event);
-
-  // Sets the cursor invisible when the target receives touch press event.
-  void SetCursorVisible(aura::Window* target,
-                        aura::LocatedEvent* event,
-                        bool show);
-
-  // Dispatches event to additional filters. Returns false or
-  // ui::TOUCH_STATUS_UNKNOWN if event is consumed.
-  bool FilterKeyEvent(aura::Window* target, aura::KeyEvent* event);
-  bool FilterMouseEvent(aura::Window* target, aura::MouseEvent* event);
-  ui::TouchStatus FilterTouchEvent(aura::Window* target,
-                                   aura::TouchEvent* event);
-
-  // Additional event filters that pre-handles events.
-  ObserverList<aura::EventFilter, true> filters_;
-
-  DISALLOW_COPY_AND_ASSIGN(RootWindowEventFilter);
-};
-
-}  // namespace internal
-}  // namespace aura_shell
-
-#endif  // UI_AURA_SHELL_ROOT_WINDOW_EVENT_FILTER_H_