us_qwerty.c

/*
 * Copyright (c) 2009 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <kbd.h>
#include <io/console.h>
#include <io/keycode.h>
#include <layout.h>

static void layout_reset(void);
static wchar_t layout_parse_ev(console_event_t *ev);

layout_op_t us_qwerty_op = {
        layout_reset,
        layout_parse_ev
};

static wchar_t map_lcase[] = {
        [KC_Q] = 'q',
        [KC_W] = 'w',
        [KC_E] = 'e',
        [KC_R] = 'r',
        [KC_T] = 't',
        [KC_Y] = 'y',
        [KC_U] = 'u',
        [KC_I] = 'i',
        [KC_O] = 'o',
        [KC_P] = 'p',

        [KC_A] = 'a',
        [KC_S] = 's',
        [KC_D] = 'd',
        [KC_F] = 'f',
        [KC_G] = 'g',
        [KC_H] = 'h',
        [KC_J] = 'j',
        [KC_K] = 'k',
        [KC_L] = 'l',

        [KC_Z] = 'z',
        [KC_X] = 'x',
        [KC_C] = 'c',
        [KC_V] = 'v',
        [KC_B] = 'b',
        [KC_N] = 'n',
        [KC_M] = 'm',
};

static wchar_t map_ucase[] = {
        [KC_Q] = 'Q',
        [KC_W] = 'W',
        [KC_E] = 'E',
        [KC_R] = 'R',
        [KC_T] = 'T',
        [KC_Y] = 'Y',
        [KC_U] = 'U',
        [KC_I] = 'I',
        [KC_O] = 'O',
        [KC_P] = 'P',

        [KC_A] = 'A',
        [KC_S] = 'S',
        [KC_D] = 'D',
        [KC_F] = 'F',
        [KC_G] = 'G',
        [KC_H] = 'H',
        [KC_J] = 'J',
        [KC_K] = 'K',
        [KC_L] = 'L',

        [KC_Z] = 'Z',
        [KC_X] = 'X',
        [KC_C] = 'C',
        [KC_V] = 'V',
        [KC_B] = 'B',
        [KC_N] = 'N',
        [KC_M] = 'M',
};

static wchar_t map_not_shifted[] = {
        [KC_BACKTICK] = '`',

        [KC_1] = '1',
        [KC_2] = '2',
        [KC_3] = '3',
        [KC_4] = '4',
        [KC_5] = '5',
        [KC_6] = '6',
        [KC_7] = '7',
        [KC_8] = '8',
        [KC_9] = '9',
        [KC_0] = '0',

        [KC_MINUS] = '-',
        [KC_EQUALS] = '=',

        [KC_LBRACKET] = '[',
        [KC_RBRACKET] = ']',

        [KC_SEMICOLON] = ';',
        [KC_QUOTE] = '\'',
        [KC_BACKSLASH] = '\\',

        [KC_COMMA] = ',',
        [KC_PERIOD] = '.',
        [KC_SLASH] = '/',
};

static wchar_t map_shifted[] = {
        [KC_BACKTICK] = '~',

        [KC_1] = '!',
        [KC_2] = '@',
        [KC_3] = '#',
        [KC_4] = '$',
        [KC_5] = '%',
        [KC_6] = '^',
        [KC_7] = '&',
        [KC_8] = '*',
        [KC_9] = '(',
        [KC_0] = ')',

        [KC_MINUS] = '_',
        [KC_EQUALS] = '+',

        [KC_LBRACKET] = '{',
        [KC_RBRACKET] = '}',

        [KC_SEMICOLON] = ':',
        [KC_QUOTE] = '"',
        [KC_BACKSLASH] = '|',

        [KC_COMMA] = '<',
        [KC_PERIOD] = '>',
        [KC_SLASH] = '?',
};

static wchar_t map_neutral[] = {
        [KC_BACKSPACE] = '\b',
        [KC_TAB] = '\t',
        [KC_ENTER] = '\n',
        [KC_SPACE] = ' ',

        [KC_NSLASH] = '/',
        [KC_NTIMES] = '*',
        [KC_NMINUS] = '-',
        [KC_NPLUS] = '+',
        [KC_NENTER] = '\n'
};

static wchar_t map_numeric[] = {
        [KC_N7] = '7',
        [KC_N8] = '8',
        [KC_N9] = '9',
        [KC_N4] = '4',
        [KC_N5] = '5',
        [KC_N6] = '6',
        [KC_N1] = '1',
        [KC_N2] = '2',
        [KC_N3] = '3',

        [KC_N0] = '0',
        [KC_NPERIOD] = '.'
};

static wchar_t translate(unsigned int key, wchar_t *map, size_t map_length)
{
        if (key >= map_length)
                return 0;
        return map[key];
}

static void layout_reset(void)
{
}

static wchar_t layout_parse_ev(console_event_t *ev)
{
        wchar_t c;

        /* Produce no characters when Ctrl or Alt is pressed. */
        if ((ev->mods & (KM_CTRL | KM_ALT)) != 0)
                return 0;

        c = translate(ev->key, map_neutral, sizeof(map_neutral) / sizeof(wchar_t));
        if (c != 0)
                return c;

        if (((ev->mods & KM_SHIFT) != 0) ^ ((ev->mods & KM_CAPS_LOCK) != 0))
                c = translate(ev->key, map_ucase, sizeof(map_ucase) / sizeof(wchar_t));
        else
                c = translate(ev->key, map_lcase, sizeof(map_lcase) / sizeof(wchar_t));

        if (c != 0)
                return c;

        if ((ev->mods & KM_SHIFT) != 0)
                c = translate(ev->key, map_shifted, sizeof(map_shifted) / sizeof(wchar_t));
        else
                c = translate(ev->key, map_not_shifted, sizeof(map_not_shifted) / sizeof(wchar_t));

        if (c != 0)
                return c;

        if ((ev->mods & KM_NUM_LOCK) != 0)
                c = translate(ev->key, map_numeric, sizeof(map_numeric) / sizeof(wchar_t));
        else
                c = 0;

        return c;
}

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