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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ | 5 #ifndef ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ |
6 #define ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ | 6 #define ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ |
7 | 7 |
8 #include "ash/ash_export.h" | 8 #include "ash/ash_export.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "base/message_loop/message_pump_dispatcher.h" | 10 #include "base/memory/scoped_ptr.h" |
| 11 |
| 12 namespace base { |
| 13 class MessagePumpDispatcher; |
| 14 class RunLoop; |
| 15 } |
| 16 |
| 17 namespace ui { |
| 18 class KeyEvent; |
| 19 } |
11 | 20 |
12 namespace ash { | 21 namespace ash { |
13 | 22 |
14 // Dispatcher for handling accelerators from menu. | 23 // Dispatcher for handling accelerators from menu. |
15 // | 24 // |
16 // Wraps a nested dispatcher to which control is passed if no accelerator key | 25 // Wraps a nested dispatcher to which control is passed if no accelerator key |
17 // has been pressed. If the nested dispatcher is NULL, then the control is | 26 // has been pressed. If the nested dispatcher is NULL, then the control is |
18 // passed back to the default dispatcher. | 27 // passed back to the default dispatcher. |
19 // TODO(pkotwicz): Add support for a |nested_dispatcher| which sends | 28 // TODO(pkotwicz): Add support for a |nested_dispatcher| which sends |
20 // events to a system IME. | 29 // events to a system IME. |
21 class ASH_EXPORT AcceleratorDispatcher : public base::MessagePumpDispatcher { | 30 class ASH_EXPORT AcceleratorDispatcher { |
22 public: | 31 public: |
23 explicit AcceleratorDispatcher(base::MessagePumpDispatcher* dispatcher); | 32 virtual ~AcceleratorDispatcher() {} |
24 virtual ~AcceleratorDispatcher(); | |
25 | 33 |
26 // MessagePumpDispatcher overrides: | 34 static scoped_ptr<AcceleratorDispatcher> Create( |
27 virtual uint32_t Dispatch(const base::NativeEvent& event) OVERRIDE; | 35 base::MessagePumpDispatcher* nested_dispatcher); |
| 36 |
| 37 // Creates a base::RunLoop object to run a nested message loop. |
| 38 virtual scoped_ptr<base::RunLoop> CreateRunLoop() = 0; |
| 39 |
| 40 protected: |
| 41 AcceleratorDispatcher() {} |
| 42 |
| 43 // Closes any open menu if the key-event could potentially be a system |
| 44 // accelerator. |
| 45 // Returns whether a menu was closed. |
| 46 bool MenuClosedForPossibleAccelerator(const ui::KeyEvent& key_event); |
| 47 |
| 48 // Attempts to trigger an accelerator for the key-event. |
| 49 // Returns whether an accelerator was triggered. |
| 50 bool AcceleratorProcessedForKeyEvent(const ui::KeyEvent& key_event); |
28 | 51 |
29 private: | 52 private: |
30 base::MessagePumpDispatcher* nested_dispatcher_; | |
31 | |
32 DISALLOW_COPY_AND_ASSIGN(AcceleratorDispatcher); | 53 DISALLOW_COPY_AND_ASSIGN(AcceleratorDispatcher); |
33 }; | 54 }; |
34 | 55 |
35 } // namespace ash | 56 } // namespace ash |
36 | 57 |
37 #endif // ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ | 58 #endif // ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_ |
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