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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef REMOTING_CLIENT_KEY_EVENT_MAPPER_H_ | |
| 6 #define REMOTING_CLIENT_KEY_EVENT_MAPPER_H_ | |
| 7 | |
| 8 #include <stdint.h> | |
| 9 | |
| 10 #include <map> | |
| 11 #include <set> | |
| 12 | |
| 13 #include "base/callback.h" | |
| 14 #include "base/compiler_specific.h" | |
| 15 #include "base/macros.h" | |
| 16 #include "remoting/protocol/input_filter.h" | |
| 17 | |
| 18 namespace remoting { | |
| 19 | |
| 20 // Filtering InputStub which can be used to re-map the USB keycodes of events | |
| 21 // before they are passed on to the next InputStub in the chain, or to trap | |
| 22 // events with specific USB keycodes for special handling. | |
| 23 class KeyEventMapper : public protocol::InputFilter { | |
| 24 public: | |
| 25 KeyEventMapper(); | |
| 26 explicit KeyEventMapper(InputStub* input_stub); | |
| 27 ~KeyEventMapper() override; | |
| 28 | |
| 29 // Callback type for use with SetTrapCallback(), below. | |
| 30 typedef base::Callback<void(const protocol::KeyEvent&)> KeyTrapCallback; | |
| 31 | |
| 32 // Sets the callback to which trapped keys will be delivered. | |
| 33 void SetTrapCallback(KeyTrapCallback callback); | |
| 34 | |
| 35 // Causes events matching |usb_keycode| to be delivered to the trap callback. | |
| 36 // Trapped events are not dispatched to the next InputStub in the chain. | |
| 37 void TrapKey(uint32_t usb_keycode, bool trap_key); | |
| 38 | |
| 39 // Causes events matching |in_usb_keycode| to be mapped to |out_usb_keycode|. | |
| 40 // Keys are remapped at most once. Traps are processed before remapping. | |
| 41 void RemapKey(uint32_t in_usb_keycode, uint32_t out_usb_keycode); | |
| 42 | |
| 43 // InputFilter overrides. | |
| 44 void InjectKeyEvent(const protocol::KeyEvent& event) override; | |
| 45 | |
| 46 private: | |
| 47 std::map<uint32_t, uint32_t> mapped_keys; | |
| 48 std::set<uint32_t> trapped_keys; | |
| 49 KeyTrapCallback trap_callback; | |
| 50 | |
| 51 DISALLOW_COPY_AND_ASSIGN(KeyEventMapper); | |
| 52 }; | |
| 53 | |
| 54 } // namespace remoting | |
| 55 | |
| 56 #endif // REMOTING_CLIENT_KEY_EVENT_MAPPER_H_ | |
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