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| 1 // Copyright 2017 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 COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_H_ |
| 6 #define COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_H_ |
| 7 |
| 8 #include <vector> |
| 9 |
| 10 #include "base/callback.h" |
| 11 #include "ui/events/keycodes/keyboard_codes.h" |
| 12 |
| 13 namespace keyboard_lock { |
| 14 |
| 15 // An interface to register and unregister key codes from low level callback. |
| 16 // The implementation needs to guarantee the thread-safety of RegisterKey() and |
| 17 // UnregisterKey() functions, which may be executed in both UI thread and |
| 18 // network thread. |
| 19 class KeyHook { |
| 20 public: |
| 21 KeyHook() = default; |
| 22 virtual ~KeyHook() = default; |
| 23 |
| 24 // The |on_result| callback will be called with the result if it's not null. |
| 25 // Calling |on_result| with |false| indicates the failure of an OK API |
| 26 // invoking. Thus, the required ui::KeyboardCode may not be able to received. |
| 27 virtual void RegisterKey(const std::vector<ui::KeyboardCode>& codes, |
| 28 base::Callback<void(bool)> on_result) = 0; |
| 29 virtual void UnregisterKey(const std::vector<ui::KeyboardCode>& codes, |
| 30 base::Callback<void(bool)> on_result) = 0; |
| 31 }; |
| 32 |
| 33 } // namespace keyboard_lock |
| 34 |
| 35 #endif // COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_H_ |
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