1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
6#define ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
7
8#include <map>
9
10#include "ash/ash_export.h"
11#include "ash/shelf/shelf_item_types.h"
12#include "ash/shelf/shelf_model_observer.h"
13#include "base/compiler_specific.h"
14#include "base/memory/scoped_ptr.h"
15
16namespace ash {
17class ShelfItemDelegate;
18class ShelfModel;
19
20namespace test {
21class ShelfItemDelegateManagerTestAPI;
22}
23
24// ShelfItemDelegateManager manages the set of ShelfItemDelegates for the
25// launcher. ShelfItemDelegateManager does not create ShelfItemDelegates,
26// rather it is expected that someone else invokes SetShelfItemDelegate
27// appropriately. On the other hand, ShelfItemDelegateManager destroys
28// ShelfItemDelegates when the corresponding item from the model is removed.
29class ASH_EXPORT ShelfItemDelegateManager : public ShelfModelObserver {
30 public:
31  explicit ShelfItemDelegateManager(ShelfModel* model);
32  virtual ~ShelfItemDelegateManager();
33
34  // Set |item_delegate| for |id| and take an ownership.
35  void SetShelfItemDelegate(ShelfID id,
36                            scoped_ptr<ShelfItemDelegate> item_delegate);
37
38  // Returns ShelfItemDelegate for |item_type|. Always returns non-NULL.
39  ShelfItemDelegate* GetShelfItemDelegate(ShelfID id);
40
41  // ShelfModelObserver overrides:
42  virtual void ShelfItemAdded(int model_index) OVERRIDE;
43  virtual void ShelfItemRemoved(int index, ShelfID id) OVERRIDE;
44  virtual void ShelfItemMoved(int start_index, int targetindex) OVERRIDE;
45  virtual void ShelfItemChanged(int index,
46                                const ShelfItem& old_item) OVERRIDE;
47  virtual void ShelfStatusChanged() OVERRIDE;
48
49 private:
50  friend class test::ShelfItemDelegateManagerTestAPI;
51
52  typedef std::map<ShelfID, ShelfItemDelegate*> ShelfIDToItemDelegateMap;
53
54  // Remove and destroy ShelfItemDelegate for |id|.
55  void RemoveShelfItemDelegate(ShelfID id);
56
57  // Owned by Shell.
58  ShelfModel* model_;
59
60  ShelfIDToItemDelegateMap id_to_item_delegate_map_;
61
62  DISALLOW_COPY_AND_ASSIGN(ShelfItemDelegateManager);
63};
64
65}  // namespace ash
66
67#endif  // ASH_SHELF_SHELF_ITEM_DELEGATE_MANAGER_H_
68