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qmk-dactyl-manuform-a/quantum/process_keycode/process_unicode_common.c

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/* Copyright 2017 Jack Humbert
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "process_unicode_common.h"
#include "eeprom.h"
#include <ctype.h>
#include <string.h>
unicode_config_t unicode_config;
uint8_t unicode_saved_mods;
#if UNICODE_SELECTED_MODES != -1
static uint8_t selected[] = {UNICODE_SELECTED_MODES};
static int8_t selected_count = sizeof selected / sizeof *selected;
static int8_t selected_index;
#endif
void unicode_input_mode_init(void) {
unicode_config.raw = eeprom_read_byte(EECONFIG_UNICODEMODE);
#if UNICODE_SELECTED_MODES != -1
# if UNICODE_CYCLE_PERSIST
// Find input_mode in selected modes
int8_t i;
for (i = 0; i < selected_count; i++) {
if (selected[i] == unicode_config.input_mode) {
selected_index = i;
break;
}
}
if (i == selected_count) {
// Not found: input_mode isn't selected, change to one that is
unicode_config.input_mode = selected[selected_index = 0];
}
# else
// Always change to the first selected input mode
unicode_config.input_mode = selected[selected_index = 0];
# endif
#endif
dprintf("Unicode input mode init to: %u\n", unicode_config.input_mode);
}
uint8_t get_unicode_input_mode(void) { return unicode_config.input_mode; }
void set_unicode_input_mode(uint8_t mode) {
unicode_config.input_mode = mode;
persist_unicode_input_mode();
dprintf("Unicode input mode set to: %u\n", unicode_config.input_mode);
}
void cycle_unicode_input_mode(int8_t offset) {
#if UNICODE_SELECTED_MODES != -1
selected_index = (selected_index + offset) % selected_count;
if (selected_index < 0) {
selected_index += selected_count;
}
unicode_config.input_mode = selected[selected_index];
# if UNICODE_CYCLE_PERSIST
persist_unicode_input_mode();
# endif
dprintf("Unicode input mode cycle to: %u\n", unicode_config.input_mode);
#endif
}
void persist_unicode_input_mode(void) { eeprom_update_byte(EECONFIG_UNICODEMODE, unicode_config.input_mode); }
__attribute__((weak)) void unicode_input_start(void) {
unicode_saved_mods = get_mods(); // Save current mods
clear_mods(); // Unregister mods to start from a clean state
switch (unicode_config.input_mode) {
case UC_MAC:
register_code(UNICODE_KEY_MAC);
break;
case UC_LNX:
tap_code16(UNICODE_KEY_LNX);
break;
case UC_WIN:
register_code(KC_LALT);
tap_code(KC_PPLS);
break;
case UC_WINC:
tap_code(UNICODE_KEY_WINC);
tap_code(KC_U);
break;
}
wait_ms(UNICODE_TYPE_DELAY);
}
__attribute__((weak)) void unicode_input_finish(void) {
switch (unicode_config.input_mode) {
case UC_MAC:
unregister_code(UNICODE_KEY_MAC);
break;
case UC_LNX:
tap_code(KC_SPC);
break;
case UC_WIN:
unregister_code(KC_LALT);
break;
case UC_WINC:
tap_code(KC_ENTER);
break;
}
set_mods(unicode_saved_mods); // Reregister previously set mods
}
__attribute__((weak)) void unicode_input_cancel(void) {
switch (unicode_config.input_mode) {
case UC_MAC:
unregister_code(UNICODE_KEY_MAC);
break;
case UC_LNX:
case UC_WINC:
tap_code(KC_ESC);
break;
case UC_WIN:
unregister_code(KC_LALT);
break;
}
set_mods(unicode_saved_mods); // Reregister previously set mods
}
__attribute__((weak)) uint16_t hex_to_keycode(uint8_t hex) {
if (hex == 0x0) {
return KC_0;
} else if (hex < 0xA) {
return KC_1 + (hex - 0x1);
} else {
return KC_A + (hex - 0xA);
}
}
void register_hex(uint16_t hex) {
for (int i = 3; i >= 0; i--) {
uint8_t digit = ((hex >> (i * 4)) & 0xF);
tap_code(hex_to_keycode(digit));
}
}
void register_hex32(uint32_t hex) {
bool onzerostart = true;
for (int i = 7; i >= 0; i--) {
if (i <= 3) {
onzerostart = false;
}
uint8_t digit = ((hex >> (i * 4)) & 0xF);
if (digit == 0) {
if (!onzerostart) {
tap_code(hex_to_keycode(digit));
}
} else {
tap_code(hex_to_keycode(digit));
onzerostart = false;
}
}
}
void register_unicode(uint32_t code_point) {
if (code_point > 0x10FFFF || (code_point > 0xFFFF && unicode_config.input_mode == UC_WIN)) {
// Code point out of range, do nothing
return;
}
unicode_input_start();
if (code_point > 0xFFFF && unicode_config.input_mode == UC_MAC) {
// Convert code point to UTF-16 surrogate pair on macOS
code_point -= 0x10000;
uint32_t lo = code_point & 0x3FF, hi = (code_point & 0xFFC00) >> 10;
register_hex32(hi + 0xD800);
register_hex32(lo + 0xDC00);
} else {
register_hex32(code_point);
}
unicode_input_finish();
}
// clang-format off
void send_unicode_hex_string(const char *str) {
if (!str) {
return;
}
while (*str) {
// Find the next code point (token) in the string
for (; *str == ' '; str++); // Skip leading spaces
size_t n = strcspn(str, " "); // Length of the current token
char code_point[n+1];
strncpy(code_point, str, n); // Copy token into buffer
code_point[n] = '\0'; // Make sure it's null-terminated
// Normalize the code point: make all hex digits lowercase
for (char *p = code_point; *p; p++) {
*p = tolower((unsigned char)*p);
}
// Send the code point as a Unicode input string
unicode_input_start();
send_string(code_point);
unicode_input_finish();
str += n; // Move to the first ' ' (or '\0') after the current token
}
}
// clang-format on
// Borrowed from https://nullprogram.com/blog/2017/10/06/
static const char *decode_utf8(const char *str, int32_t *code_point) {
const char *next;
if (str[0] < 0x80) { // U+0000-007F
*code_point = str[0];
next = str + 1;
} else if ((str[0] & 0xE0) == 0xC0) { // U+0080-07FF
*code_point = ((int32_t)(str[0] & 0x1F) << 6) | ((int32_t)(str[1] & 0x3F) << 0);
next = str + 2;
} else if ((str[0] & 0xF0) == 0xE0) { // U+0800-FFFF
*code_point = ((int32_t)(str[0] & 0x0F) << 12) | ((int32_t)(str[1] & 0x3F) << 6) | ((int32_t)(str[2] & 0x3F) << 0);
next = str + 3;
} else if ((str[0] & 0xF8) == 0xF0 && (str[0] <= 0xF4)) { // U+10000-10FFFF
*code_point = ((int32_t)(str[0] & 0x07) << 18) | ((int32_t)(str[1] & 0x3F) << 12) | ((int32_t)(str[2] & 0x3F) << 6) | ((int32_t)(str[3] & 0x3F) << 0);
next = str + 4;
} else {
*code_point = -1;
next = str + 1;
}
// part of a UTF-16 surrogate pair - invalid
if (*code_point >= 0xD800 && *code_point <= 0xDFFF) {
*code_point = -1;
}
return next;
}
void send_unicode_string(const char *str) {
if (!str) {
return;
}
while (*str) {
int32_t code_point = 0;
str = decode_utf8(str, &code_point);
if (code_point >= 0) {
register_unicode(code_point);
}
}
}
// clang-format off
static void audio_helper(void) {
#ifdef AUDIO_ENABLE
switch (get_unicode_input_mode()) {
# ifdef UNICODE_SONG_MAC
static float song_mac[][2] = UNICODE_SONG_MAC;
case UC_MAC:
PLAY_SONG(song_mac);
break;
# endif
# ifdef UNICODE_SONG_LNX
static float song_lnx[][2] = UNICODE_SONG_LNX;
case UC_LNX:
PLAY_SONG(song_lnx);
break;
# endif
# ifdef UNICODE_SONG_WIN
static float song_win[][2] = UNICODE_SONG_WIN;
case UC_WIN:
PLAY_SONG(song_win);
break;
# endif
# ifdef UNICODE_SONG_BSD
static float song_bsd[][2] = UNICODE_SONG_BSD;
case UC_BSD:
PLAY_SONG(song_bsd);
break;
# endif
# ifdef UNICODE_SONG_WINC
static float song_winc[][2] = UNICODE_SONG_WINC;
case UC_WINC:
PLAY_SONG(song_winc);
break;
# endif
}
#endif
}
// clang-format on
bool process_unicode_common(uint16_t keycode, keyrecord_t *record) {
if (record->event.pressed) {
bool shifted = get_mods() & MOD_MASK_SHIFT;
switch (keycode) {
case UNICODE_MODE_FORWARD:
cycle_unicode_input_mode(shifted ? -1 : +1);
audio_helper();
break;
case UNICODE_MODE_REVERSE:
cycle_unicode_input_mode(shifted ? +1 : -1);
audio_helper();
break;
case UNICODE_MODE_MAC ... UNICODE_MODE_WINC: {
// Keycodes and input modes follow the same ordering
uint8_t delta = keycode - UNICODE_MODE_MAC;
set_unicode_input_mode(UC_MAC + delta);
audio_helper();
break;
}
}
}
#if defined(UNICODE_ENABLE)
return process_unicode(keycode, record);
#elif defined(UNICODEMAP_ENABLE)
return process_unicodemap(keycode, record);
#elif defined(UCIS_ENABLE)
return process_ucis(keycode, record);
#else
return true;
#endif
}
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