blob: cd9ac4315745a267d3af1d2bb3fd3234d69c1b2c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_KEYCODES_KEYCODE_CONVERTER_H_
#define UI_BASE_KEYCODES_KEYCODE_CONVERTER_H_
#include <stdint.h>
#include "base/basictypes.h"
#include "base/memory/singleton.h"
// For reference, the W3C UI Event spec is located at:
// http://www.w3.org/TR/uievents/
namespace ui {
// This structure is used to define the keycode mapping table.
// It is defined here because the unittests need access to it.
typedef struct {
// USB keycode:
// Upper 16-bits: USB Usage Page.
// Lower 16-bits: USB Usage Id: Assigned ID within this usage page.
uint32_t usb_keycode;
// Contains one of the following:
// On Linux: XKB scancode
// On Windows: Windows OEM scancode
// On Mac: Mac keycode
uint16_t native_keycode;
// The UIEvents (aka: DOM4Events) |code| value as defined in:
// https://dvcs.w3.org/hg/d4e/raw-file/tip/source_respec.htm
const char* code;
} KeycodeMapEntry;
// A class to convert between the current platform's native keycode (scancode)
// and platform-neutral |code| values (as defined in the W3C UI Events
// spec (http://www.w3.org/TR/uievents/).
class KeycodeConverter {
public:
static KeycodeConverter* GetInstance();
// Return the value that identifies an invalid native keycode.
uint16_t InvalidNativeKeycode();
// Return the string that indentifies an invalid UI Event |code|.
// The returned pointer references a static global string.
const char* InvalidKeyboardEventCode();
// Convert a native (Mac/Win/Linux) keycode into the |code| string.
// The returned pointer references a static global string.
const char* NativeKeycodeToCode(uint16_t native_keycode);
// Convert a UI Events |code| string value into a native keycode.
uint16_t CodeToNativeKeycode(const char* code);
// The following methods relate to USB keycodes.
// Note that USB keycodes are not part of any web standard.
// Please don't use USB keycodes in new code.
// Return the value that identifies an invalid USB keycode.
uint16_t InvalidUsbKeycode();
// Convert a USB keycode into an equivalent platform native keycode.
uint16_t UsbKeycodeToNativeKeycode(uint32_t usb_keycode);
// Convert a platform native keycode into an equivalent USB keycode.
uint32_t NativeKeycodeToUsbKeycode(uint16_t native_keycode);
// Convert a USB keycode into the string with the UI Event |code| value.
// The returned pointer references a static global string.
const char* UsbKeycodeToCode(uint32_t usb_keycode);
// Static methods to support testing.
size_t NumKeycodeMapEntriesForTest();
const KeycodeMapEntry* GetKeycodeMapForTest();
private:
KeycodeConverter();
friend struct DefaultSingletonTraits<KeycodeConverter>;
DISALLOW_COPY_AND_ASSIGN(KeycodeConverter);
};
} // namespace ui
#endif // UI_BASE_KEYCODE_CONVERTER_H_
|
