// 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 ASH_WM_WORKSPACE_CONTROLLER_H_
#define ASH_WM_WORKSPACE_CONTROLLER_H_
#pragma once

#include "ash/launcher/launcher_model_observer.h"
#include "ash/wm/workspace/workspace_observer.h"
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/root_window_observer.h"
#include "ui/aura/window_observer.h"
#include "ash/ash_export.h"

namespace aura {
class Window;
}

namespace gfx {
class Size;
}

namespace ash {
class LauncherModel;

namespace internal {

class WorkspaceManager;

// WorkspaceControlls owns a WorkspaceManager. WorkspaceControlls bridges
// events From RootWindowObserver translating them to WorkspaceManager, and
// a move event between Laucher and Workspace.
class ASH_EXPORT WorkspaceController :
      public aura::RootWindowObserver,
      public aura::WindowObserver,
      public ash::internal::WorkspaceObserver,
      public ash::LauncherModelObserver {
 public:
  explicit WorkspaceController(aura::Window* workspace_viewport);
  virtual ~WorkspaceController();

  void ToggleOverview();

  void SetLauncherModel(LauncherModel* launcher_model);

  // Returns the workspace manager that this controler owns.
  WorkspaceManager* workspace_manager() {
    return workspace_manager_.get();
  }

  // aura::RootWindowObserver overrides:
  virtual void OnRootWindowResized(const gfx::Size& new_size) OVERRIDE;

  // aura::WindowObserver overrides:
  virtual void OnWindowPropertyChanged(aura::Window* window,
                                       const char* key,
                                       void* old) OVERRIDE;

  // WorkspaceObserver overrides:
  virtual void WindowMoved(WorkspaceManager* manager,
                           aura::Window* source,
                           aura::Window* target) OVERRIDE;
  virtual void ActiveWorkspaceChanged(WorkspaceManager* manager,
                                      Workspace* old) OVERRIDE;

  // Invoked after an item has been added to the model.
  virtual void LauncherItemAdded(int index) OVERRIDE;
  virtual void LauncherItemRemoved(int index) OVERRIDE;
  virtual void LauncherItemMoved(int start_index, int target_index) OVERRIDE;
  virtual void LauncherItemImagesChanged(int index) OVERRIDE;
  virtual void LauncherItemImagesWillChange(int index) OVERRIDE {}

 private:
  scoped_ptr<WorkspaceManager> workspace_manager_;

  // Owned by Launcher.
  LauncherModel* launcher_model_;

  // True while the controller is moving window either on workspace or launcher.
  // Used to prevent infinite recursive call between the workspace and launcher.
  bool ignore_move_event_;

  DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
};

}  // namespace internal
}  // namespace ash

#endif  // ASH_WM_WORKSPACE_CONTROLLER_H_