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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef VIEWS_FOCUS_VIEW_STORAGE_H_ | 5 #ifndef VIEWS_FOCUS_VIEW_STORAGE_H_ |
| 6 #define VIEWS_FOCUS_VIEW_STORAGE_H_ | 6 #define VIEWS_FOCUS_VIEW_STORAGE_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include "base/singleton.h" | 9 #include "base/singleton.h" |
| 10 #include "views/view.h" | 10 #include "views/view.h" |
| 11 | 11 |
| 12 // This class is a simple storage place for storing/retrieving views. It is | 12 // This class is a simple storage place for storing/retrieving views. It is |
| 13 // used for example in the FocusManager to store/restore focused views when the | 13 // used for example in the FocusManager to store/restore focused views when the |
| 14 // main window becomes active/inactive. | 14 // main window becomes active/inactive. |
| 15 // It automatically removes a view from the storage if the view is removed from | 15 // It automatically removes a view from the storage if the view is removed from |
| 16 // the tree hierarchy. | 16 // the tree hierarchy. |
| 17 // | 17 // |
| 18 // To use it, you first need to create a view storage id that can then be used | 18 // To use it, you first need to create a view storage id that can then be used |
| 19 // to store/retrieve views. | 19 // to store/retrieve views. |
| 20 | 20 |
| 21 namespace views { | 21 namespace views { |
| 22 | 22 |
| 23 class ViewStorage { | 23 class ViewStorage { |
| 24 public: | 24 public: |
| 25 // Returns the global ViewStorage instance. | 25 // Returns the global ViewStorage instance. |
| 26 // It is guaranted to be non NULL. | 26 // It is guaranted to be non NULL. |
| 27 static ViewStorage* GetSharedInstance(); | 27 static ViewStorage* GetInstance(); |
| 28 | 28 |
| 29 // Returns a unique storage id that can be used to store/retrieve views. | 29 // Returns a unique storage id that can be used to store/retrieve views. |
| 30 int CreateStorageID(); | 30 int CreateStorageID(); |
| 31 | 31 |
| 32 // Associates |view| with the specified |storage_id|. | 32 // Associates |view| with the specified |storage_id|. |
| 33 void StoreView(int storage_id, View* view); | 33 void StoreView(int storage_id, View* view); |
| 34 | 34 |
| 35 // Returns the view associated with |storage_id| if any, NULL otherwise. | 35 // Returns the view associated with |storage_id| if any, NULL otherwise. |
| 36 View* RetrieveView(int storage_id); | 36 View* RetrieveView(int storage_id); |
| 37 | 37 |
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| 63 | 63 |
| 64 // Association View to id, used to speed up view notification removal. | 64 // Association View to id, used to speed up view notification removal. |
| 65 std::map<View*, std::vector<int>*> view_to_ids_; | 65 std::map<View*, std::vector<int>*> view_to_ids_; |
| 66 | 66 |
| 67 DISALLOW_COPY_AND_ASSIGN(ViewStorage); | 67 DISALLOW_COPY_AND_ASSIGN(ViewStorage); |
| 68 }; | 68 }; |
| 69 | 69 |
| 70 } // namespace views | 70 } // namespace views |
| 71 | 71 |
| 72 #endif // VIEWS_FOCUS_VIEW_STORAGE_H_ | 72 #endif // VIEWS_FOCUS_VIEW_STORAGE_H_ |
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