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Side by Side Diff: remoting/client/key_event_mapper.h

Issue 2900203002: Moving input filter files and keymap to input directory. (Closed)
Patch Set: Fix include for input. Created 3 years, 6 months ago
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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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