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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ | 5 #ifndef UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ |
6 #define UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ | 6 #define UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ |
7 | 7 |
8 #include "base/memory/singleton.h" | 8 #include "base/memory/singleton.h" |
9 #include "ui/base/accelerators/accelerator.h" | 9 #include "ui/base/accelerators/accelerator.h" |
10 #include "ui/base/ui_base_export.h" | 10 #include "ui/base/ui_base_export.h" |
11 #include "ui/events/event.h" | 11 #include "ui/events/event.h" |
12 #include "ui/events/event_handler.h" | 12 #include "ui/events/event_handler.h" |
13 | 13 |
14 namespace ui { | 14 namespace ui { |
15 | 15 |
16 // Keeps track of the system-wide current and the most recent previous | 16 // Keeps track of the system-wide current and the most recent previous |
17 // key accelerators. | 17 // key accelerators. |
18 class UI_BASE_EXPORT AcceleratorHistory { | 18 class UI_BASE_EXPORT AcceleratorHistory { |
19 public: | 19 public: |
20 AcceleratorHistory(); | 20 AcceleratorHistory(); |
21 ~AcceleratorHistory(); | 21 ~AcceleratorHistory(); |
22 | 22 |
23 // Returns the most recent recorded accelerator. | 23 // Returns the most recent recorded accelerator. |
24 const Accelerator& current_accelerator() const { | 24 const Accelerator& current_accelerator() const { |
25 return current_accelerator_; | 25 return current_accelerator_; |
26 } | 26 } |
27 | 27 |
28 // Returns the most recent previously recorded accelerator that is different | 28 // Returns the most recent previously recorded key accelerator that is |
29 // than the current. | 29 // different than the current. Non-synthesized mouse events will be stored |
| 30 // in the histroy as an empty accelerator. |
30 const Accelerator& previous_accelerator() const { | 31 const Accelerator& previous_accelerator() const { |
31 return previous_accelerator_; | 32 return previous_accelerator_; |
32 } | 33 } |
33 | 34 |
34 // Stores the given |accelerator| only if it's different than the currently | 35 // Stores the given |accelerator| only if it's different than the currently |
35 // stored one. | 36 // stored one. |
36 void StoreCurrentAccelerator(const Accelerator& accelerator); | 37 void StoreCurrentAccelerator(const Accelerator& accelerator); |
37 | 38 |
38 private: | 39 private: |
39 Accelerator current_accelerator_; | 40 Accelerator current_accelerator_; |
40 Accelerator previous_accelerator_; | 41 Accelerator previous_accelerator_; |
41 | 42 |
42 DISALLOW_COPY_AND_ASSIGN(AcceleratorHistory); | 43 DISALLOW_COPY_AND_ASSIGN(AcceleratorHistory); |
43 }; | 44 }; |
44 | 45 |
45 }; // namespace ui | 46 }; // namespace ui |
46 | 47 |
47 #endif // UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ | 48 #endif // UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_ |
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