ui/events/keycodes/keyboard_code_conversion.cc

   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
   9 namespace ui {
  10
  11 uint16 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