Move some more WM functionality down into ash.

ui/aura_shell/toplevel_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_TOPLEVEL_WINDOW_EVENT_FILTER_H_
-#define UI_AURA_SHELL_TOPLEVEL_WINDOW_EVENT_FILTER_H_
-#pragma once
-
-#include <set>
-
-#include "base/compiler_specific.h"
-#include "ui/aura/event_filter.h"
-#include "ui/aura_shell/aura_shell_export.h"
-#include "ui/gfx/point.h"
-#include "ui/gfx/rect.h"
-
-namespace aura {
-class LocatedEvent;
-class MouseEvent;
-class Window;
-}
-
-namespace aura_shell {
-
-class AURA_SHELL_EXPORT ToplevelWindowEventFilter : public aura::EventFilter {
- public:
-  explicit ToplevelWindowEventFilter(aura::Window* owner);
-  virtual ~ToplevelWindowEventFilter();
-
-  // Overridden from aura::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;
-
- protected:
-  // Returns the |window_component_|. See the variable definition below for
-  // more details.
-  int window_component() const { return window_component_; }
-
- private:
-  // Moves the target window and all of its parents to the front of their
-  // respective z-orders.
-  // NOTE: this does NOT activate the window.
-  void MoveWindowToFront(aura::Window* target);
-
-  // Called during a drag to resize/position the window.
-  // The return value is returned by OnMouseEvent() above.
-  bool HandleDrag(aura::Window* target, aura::LocatedEvent* event);
-
-  // Updates the event location to window.
-  void UpdateLocationFromEvent(aura::Window* target,
-                               aura::LocatedEvent* event);
-
-  // Updates the |window_component_| using the |event|'s location.
-  void UpdateWindowComponentForEvent(aura::Window* window,
-                                     aura::LocatedEvent* event);
-
-  // Calculates the new origin of the window during a drag.
-  gfx::Point GetOriginForDrag(int bounds_change,
-                              int delta_x,
-                              int delta_y) const;
-
-  // Calculates the new size of the |target| window during a drag.
-  // If the size is constrained, |delta_x| and |delta_y| may be clamped.
-  gfx::Size GetSizeForDrag(int bounds_change,
-                           aura::Window* target,
-                           int* delta_x,
-                           int* delta_y) const;
-
-  // Calculates new width of a window during a drag where the mouse
-  // position changed by |delta_x|.  |delta_x| may be clamped if the window
-  // size is constrained by |min_width|.
-  int GetWidthForDrag(int size_change_direction,
-                      int min_width,
-                      int* delta_x) const;
-
-  // Calculates new height of a window during a drag where the mouse
-  // position changed by |delta_y|.  |delta_y| may be clamped if the window
-  // size is constrained by |min_height|.
-  int GetHeightForDrag(int size_change_direction,
-                       int min_height,
-                       int* delta_y) const;
-
-  // The mouse position in the target window when the mouse was pressed, in
-  // the target window's parent's coordinates.
-  gfx::Point mouse_down_offset_in_parent_;
-
-  // The bounds of the target window when the mouse was pressed.
-  gfx::Rect mouse_down_bounds_;
-
-  // The window component (hit-test code) the mouse is currently over.
-  int window_component_;
-
-  // Set of touch ids currently pressed.
-  std::set<int> pressed_touch_ids_;
-
-  DISALLOW_COPY_AND_ASSIGN(ToplevelWindowEventFilter);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_SHELL_TOPLEVEL_WINDOW_EVENT_FILTER_H_