chromeos: Move files in //ash/common to //ash

ash/common/wm/wm_toplevel_window_event_handler.h

-// 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.
-
-#ifndef ASH_COMMON_WM_WM_TOPLEVEL_WINDOW_EVENT_HANDLER_H_
-#define ASH_COMMON_WM_WM_TOPLEVEL_WINDOW_EVENT_HANDLER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/wm/wm_types.h"
-#include "ash/common/wm_display_observer.h"
-#include "base/callback.h"
-#include "base/macros.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/wm/public/window_move_client.h"
-
-namespace ui {
-class KeyEvent;
-class LocatedEvent;
-class MouseEvent;
-class GestureEvent;
-}
-
-namespace ash {
-
-class WmShell;
-class WmWindow;
-
-namespace wm {
-
-// WmToplevelWindowEventHandler handles dragging and resizing of top level
-// windows. WmToplevelWindowEventHandler is forwarded events, such as from an
-// EventHandler.
-class ASH_EXPORT WmToplevelWindowEventHandler : public WmDisplayObserver {
- public:
-  // Describes what triggered ending the drag.
-  enum class DragResult {
-    // The drag successfully completed.
-    SUCCESS,
-
-    REVERT,
-
-    // The underlying window was destroyed while the drag is in process.
-    WINDOW_DESTROYED
-  };
-  using EndClosure = base::Callback<void(DragResult)>;
-
-  explicit WmToplevelWindowEventHandler(WmShell* shell);
-  ~WmToplevelWindowEventHandler() override;
-
-  void OnKeyEvent(ui::KeyEvent* event);
-  void OnMouseEvent(ui::MouseEvent* event, WmWindow* target);
-  void OnGestureEvent(ui::GestureEvent* event, WmWindow* target);
-
-  // Attempts to start a drag if one is not already in progress. Returns true if
-  // successful. |end_closure| is run when the drag completes. |end_closure| is
-  // not run if the drag does not start.
-  bool AttemptToStartDrag(WmWindow* window,
-                          const gfx::Point& point_in_parent,
-                          int window_component,
-                          aura::client::WindowMoveSource source,
-                          const EndClosure& end_closure);
-
-  // If there is a drag in progress it is reverted, otherwise does nothing.
-  void RevertDrag();
-
-  // Returns true if there is a drag in progress.
-  bool is_drag_in_progress() const { return window_resizer_.get() != nullptr; }
-
- private:
-  class ScopedWindowResizer;
-
-  // Completes or reverts the drag if one is in progress. Returns true if a
-  // drag was completed or reverted.
-  bool CompleteDrag(DragResult result);
-
-  void HandleMousePressed(WmWindow* target, ui::MouseEvent* event);
-  void HandleMouseReleased(WmWindow* target, ui::MouseEvent* event);
-
-  // Called during a drag to resize/position the window.
-  void HandleDrag(WmWindow* target, ui::LocatedEvent* event);
-
-  // Called during mouse moves to update window resize shadows.
-  void HandleMouseMoved(WmWindow* target, ui::LocatedEvent* event);
-
-  // Called for mouse exits to hide window resize shadows.
-  void HandleMouseExited(WmWindow* target, ui::LocatedEvent* event);
-
-  // Called when mouse capture is lost.
-  void HandleCaptureLost(ui::LocatedEvent* event);
-
-  // Sets |window|'s state type to |new_state_type|. Called after the drag has
-  // been completed for fling gestures.
-  void SetWindowStateTypeFromGesture(WmWindow* window,
-                                     wm::WindowStateType new_state_type);
-
-  // Invoked from ScopedWindowResizer if the window is destroyed.
-  void ResizerWindowDestroyed();
-
-  // WmDisplayObserver:
-  void OnDisplayConfigurationChanging() override;
-
-  WmShell* shell_;
-
-  // The hittest result for the first finger at the time that it initially
-  // touched the screen. |first_finger_hittest_| is one of ui/base/hit_test.h
-  int first_finger_hittest_;
-
-  // The window bounds when the drag was started. When a window is minimized,
-  // maximized or snapped via a swipe/fling gesture, the restore bounds should
-  // be set to the bounds of the window when the drag was started.
-  gfx::Rect pre_drag_window_bounds_;
-
-  // Is a window move/resize in progress because of gesture events?
-  bool in_gesture_drag_ = false;
-
-  std::unique_ptr<ScopedWindowResizer> window_resizer_;
-
-  EndClosure end_closure_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmToplevelWindowEventHandler);
-};
-
-}  // namespace wm
-}  // namespace ash
-
-#endif  // ASH_COMMON_WM_WM_TOPLEVEL_WINDOW_EVENT_HANDLER_H_