Moves move logic into WM instead of WS

components/mus/ws/move_loop.h

-// Copyright 2015 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 COMPONENTS_MUS_WS_MOVE_LOOP_H_
-#define COMPONENTS_MUS_WS_MOVE_LOOP_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "components/mus/ws/server_window_observer.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/mojo/events/input_events.mojom.h"
-
-namespace mus {
-namespace ws {
-
-class ServerWindow;
-
-// MoveLoop is responsible for moving/resizing windows. EventDispatcher
-// attempts to create a MoveLoop on every POINTER_DOWN event. Once a MoveLoop
-// is created it is fed events until an event is received that stops the loop.
-class MoveLoop : public ServerWindowObserver {
- public:
-  enum MoveResult {
-    // The move is still ongoing.
-    CONTINUE,
-
-    // The move is done and the MoveLoop should be destroyed.
-    DONE,
-  };
-
-  ~MoveLoop() override;
-
-  // If a move/resize loop should occur for the specified parameters creates
-  // and returns a new MoveLoop. All events should be funneled to the MoveLoop
-  // until done (Move()).
-  static scoped_ptr<MoveLoop> Create(ServerWindow* target,
-                                     const mojo::Event& event);
-
-  // Processes an event for a move/resize loop.
-  MoveResult Move(const mojo::Event& event);
-
- private:
-  MoveLoop(ServerWindow* target, const mojo::Event& event);
-
-  // Does the actual move/resize.
-  void MoveImpl(const mojo::Event& event);
-
-  // Cancels the loop. This sets |target_| to null and removes the observer.
-  // After this the MoveLoop is still ongoing and won't stop until the
-  // appropriate event is received.
-  void Cancel();
-
-  void Revert();
-
-  // ServerWindowObserver:
-  void OnWindowHierarchyChanged(ServerWindow* window,
-                                ServerWindow* new_parent,
-                                ServerWindow* old_parent) override;
-  void OnWindowBoundsChanged(ServerWindow* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override;
-  void OnWindowVisibilityChanged(ServerWindow* window) override;
-
-  // The window this MoveLoop is acting on. |target_| is set to null if the
-  // window unexpectedly changes while the move is in progress.
-  ServerWindow* target_;
-
-  // The id of the pointer that triggered the move.
-  const int32_t pointer_id_;
-
-  // Location of the event (in screen coordinates) that triggered the move.
-  const gfx::Point initial_event_screen_location_;
-
-  // Original bounds of the window.
-  const gfx::Rect initial_window_bounds_;
-
-  // Set to true when MoveLoop changes the bounds of |target_|. The move is
-  // canceled if the bounds change unexpectedly during the move.
-  bool changing_bounds_;
-
-  DISALLOW_COPY_AND_ASSIGN(MoveLoop);
-};
-
-}  // namespace ws
-}  // namespace mus
-
-#endif  // COMPONENTS_MUS_WS_MOVE_LOOP_H_