keyboard_code_conversion.cc revision d0247b1b59f9c528cb6df88b4f2b9afaf80d181e 
1// Copyright (c) 2011 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#include "ui/events/keycodes/keyboard_code_conversion.h"
6
7#include "ui/events/event_constants.h"
8
9namespace ui {
10
11uint16 GetCharacterFromKeyCode(KeyboardCode key_code, int flags) {
12  const bool ctrl = (flags & EF_CONTROL_DOWN) != 0;
13  const bool shift = (flags & EF_SHIFT_DOWN) != 0;
14  const bool upper = shift ^ ((flags & EF_CAPS_LOCK_DOWN) != 0);
15
16  // Following Windows behavior to map ctrl-a ~ ctrl-z to \x01 ~ \x1A.
17  if (key_code >= VKEY_A && key_code <= VKEY_Z)
18    return key_code - VKEY_A + (ctrl ? 1 : (upper ? 'A' : 'a'));
19
20  // Other ctrl characters
21  if (ctrl) {
22    if (shift) {
23      // following graphics chars require shift key to input.
24      switch (key_code) {
25        // ctrl-@ maps to \x00 (Null byte)
26        case VKEY_2:
27          return 0;
28        // ctrl-^ maps to \x1E (Record separator, Information separator two)
29        case VKEY_6:
30          return 0x1E;
31        // ctrl-_ maps to \x1F (Unit separator, Information separator one)
32        case VKEY_OEM_MINUS:
33          return 0x1F;
34        // Returns 0 for all other keys to avoid inputting unexpected chars.
35        default:
36          return 0;
37      }
38    } else {
39      switch (key_code) {
40        // ctrl-[ maps to \x1B (Escape)
41        case VKEY_OEM_4:
42          return 0x1B;
43        // ctrl-\ maps to \x1C (File separator, Information separator four)
44        case VKEY_OEM_5:
45          return 0x1C;
46        // ctrl-] maps to \x1D (Group separator, Information separator three)
47        case VKEY_OEM_6:
48          return 0x1D;
49        // ctrl-Enter maps to \x0A (Line feed)
50        case VKEY_RETURN:
51          return 0x0A;
52        // Returns 0 for all other keys to avoid inputting unexpected chars.
53        default:
54          return 0;
55      }
56    }
57  }
58
59  // For IME support.
60  if (key_code == ui::VKEY_PROCESSKEY)
61    return 0xE5;
62
63  // Normal characters
64  if (key_code >= VKEY_0 && key_code <= VKEY_9) {
65    return shift ? ")!@#$%^&*("[key_code - VKEY_0] :
66        static_cast<uint16>(key_code);
67  } else if (key_code >= VKEY_NUMPAD0 && key_code <= VKEY_NUMPAD9) {
68    return key_code - VKEY_NUMPAD0 + '0';
69  }
70
71  switch (key_code) {
72    case VKEY_TAB:
73      return '\t';
74    case VKEY_RETURN:
75      return '\r';
76    case VKEY_MULTIPLY:
77      return '*';
78    case VKEY_ADD:
79      return '+';
80    case VKEY_SUBTRACT:
81      return '-';
82    case VKEY_DECIMAL:
83      return '.';
84    case VKEY_DIVIDE:
85      return '/';
86    case VKEY_SPACE:
87      return ' ';
88    case VKEY_OEM_1:
89      return shift ? ':' : ';';
90    case VKEY_OEM_PLUS:
91      return shift ? '+' : '=';
92    case VKEY_OEM_COMMA:
93      return shift ? '<' : ',';
94    case VKEY_OEM_MINUS:
95      return shift ? '_' : '-';
96    case VKEY_OEM_PERIOD:
97      return shift ? '>' : '.';
98    case VKEY_OEM_2:
99      return shift ? '?' : '/';
100    case VKEY_OEM_3:
101      return shift ? '~' : '`';
102    case VKEY_OEM_4:
103      return shift ? '{' : '[';
104    case VKEY_OEM_5:
105      return shift ? '|' : '\\';
106    case VKEY_OEM_6:
107      return shift ? '}' : ']';
108    case VKEY_OEM_7:
109      return shift ? '"' : '\'';
110    default:
111      return 0;
112  }
113}
114
115}  // namespace ui
116