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// Copyright (c) 2011 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.
#include "ui/events/keycodes/keyboard_code_conversion.h"
#include "ui/events/event_constants.h"
namespace ui {
uint16 GetCharacterFromKeyCode(KeyboardCode key_code, int flags) {
const bool ctrl = (flags & EF_CONTROL_DOWN) != 0;
const bool shift = (flags & EF_SHIFT_DOWN) != 0;
const bool upper = shift ^ ((flags & EF_CAPS_LOCK_DOWN) != 0);
// Following Windows behavior to map ctrl-a ~ ctrl-z to \x01 ~ \x1A.
if (key_code >= VKEY_A && key_code <= VKEY_Z)
return key_code - VKEY_A + (ctrl ? 1 : (upper ? 'A' : 'a'));
// Other ctrl characters
if (ctrl) {
if (shift) {
// following graphics chars require shift key to input.
switch (key_code) {
// ctrl-@ maps to \x00 (Null byte)
case VKEY_2:
return 0;
// ctrl-^ maps to \x1E (Record separator, Information separator two)
case VKEY_6:
return 0x1E;
// ctrl-_ maps to \x1F (Unit separator, Information separator one)
case VKEY_OEM_MINUS:
return 0x1F;
// Returns 0 for all other keys to avoid inputting unexpected chars.
default:
return 0;
}
} else {
switch (key_code) {
// ctrl-[ maps to \x1B (Escape)
case VKEY_OEM_4:
return 0x1B;
// ctrl-\ maps to \x1C (File separator, Information separator four)
case VKEY_OEM_5:
return 0x1C;
// ctrl-] maps to \x1D (Group separator, Information separator three)
case VKEY_OEM_6:
return 0x1D;
// ctrl-Enter maps to \x0A (Line feed)
case VKEY_RETURN:
return 0x0A;
// Returns 0 for all other keys to avoid inputting unexpected chars.
default:
return 0;
}
}
}
// For IME support.
if (key_code == ui::VKEY_PROCESSKEY)
return 0xE5;
// Normal characters
if (key_code >= VKEY_0 && key_code <= VKEY_9) {
return shift ? ")!@#$%^&*("[key_code - VKEY_0] :
static_cast<uint16>(key_code);
} else if (key_code >= VKEY_NUMPAD0 && key_code <= VKEY_NUMPAD9) {
return key_code - VKEY_NUMPAD0 + '0';
}
switch (key_code) {
case VKEY_TAB:
return '\t';
case VKEY_RETURN:
return '\r';
case VKEY_MULTIPLY:
return '*';
case VKEY_ADD:
return '+';
case VKEY_SUBTRACT:
return '-';
case VKEY_DECIMAL:
return '.';
case VKEY_DIVIDE:
return '/';
case VKEY_SPACE:
return ' ';
case VKEY_OEM_1:
return shift ? ':' : ';';
case VKEY_OEM_PLUS:
return shift ? '+' : '=';
case VKEY_OEM_COMMA:
return shift ? '<' : ',';
case VKEY_OEM_MINUS:
return shift ? '_' : '-';
case VKEY_OEM_PERIOD:
return shift ? '>' : '.';
case VKEY_OEM_2:
return shift ? '?' : '/';
case VKEY_OEM_3:
return shift ? '~' : '`';
case VKEY_OEM_4:
return shift ? '{' : '[';
case VKEY_OEM_5:
return shift ? '|' : '\\';
case VKEY_OEM_6:
return shift ? '}' : ']';
case VKEY_OEM_7:
return shift ? '"' : '\'';
default:
return 0;
}
}
} // namespace ui
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