Upstream version 5.34.104.0
[platform/framework/web/crosswalk.git] / src / ash / shelf / shelf_item_delegate_manager.h
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
16 namespace ash {
17 class ShelfItemDelegate;
18 class ShelfModel;
19
20 namespace test {
21 class 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.
29 class 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_