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qmk_firmware/quantum/unicode/unicode.c

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/* Copyright 2022
*
* 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 "unicode.h"
#include "eeprom.h"
#include "eeconfig.h"
#include "action.h"
#include "action_util.h"
#include "host.h"
#include "keycode.h"
#include "wait.h"
#include "send_string.h"
#include "utf8.h"
#if defined(AUDIO_ENABLE)
# include "audio.h"
#endif
#if defined(UNICODE_ENABLE) + defined(UNICODEMAP_ENABLE) + defined(UCIS_ENABLE) > 1
# error "Cannot enable more than one Unicode method (UNICODE, UNICODEMAP, UCIS) at the same time"
#endif
// Keycodes used for starting Unicode input on different platforms
#ifndef UNICODE_KEY_MAC
# define UNICODE_KEY_MAC KC_LEFT_ALT
#endif
#ifndef UNICODE_KEY_LNX
# define UNICODE_KEY_LNX LCTL(LSFT(KC_U))
#endif
#ifndef UNICODE_KEY_WINC
# define UNICODE_KEY_WINC KC_RIGHT_ALT
#endif
// Comma-delimited, ordered list of input modes selected for use (e.g. in cycle)
// Example: #define UNICODE_SELECTED_MODES UC_WINC, UC_LNX
#ifndef UNICODE_SELECTED_MODES
# define UNICODE_SELECTED_MODES -1
#endif
// Whether input mode changes in cycle should be written to EEPROM
#ifndef UNICODE_CYCLE_PERSIST
# define UNICODE_CYCLE_PERSIST true
#endif
// Delay between starting Unicode input and sending a sequence, in ms
#ifndef UNICODE_TYPE_DELAY
# define UNICODE_TYPE_DELAY 10
#endif
unicode_config_t unicode_config;
uint8_t unicode_saved_mods;
led_t unicode_saved_led_state;
#if UNICODE_SELECTED_MODES != -1
static uint8_t selected[] = {UNICODE_SELECTED_MODES};
static int8_t selected_count = ARRAY_SIZE(selected);
static int8_t selected_index;
#endif
/** \brief unicode input mode set at user level
*
* Run user code on unicode input mode change
*/
__attribute__((weak)) void unicode_input_mode_set_user(uint8_t input_mode) {}
/** \brief unicode input mode set at keyboard level
*
* Run keyboard code on unicode input mode change
*/
__attribute__((weak)) void unicode_input_mode_set_kb(uint8_t input_mode) {
unicode_input_mode_set_user(input_mode);
}
#ifdef AUDIO_ENABLE
# ifdef UNICODE_SONG_MAC
static float song_mac[][2] = UNICODE_SONG_MAC;
# endif
# ifdef UNICODE_SONG_LNX
static float song_lnx[][2] = UNICODE_SONG_LNX;
# endif
# ifdef UNICODE_SONG_WIN
static float song_win[][2] = UNICODE_SONG_WIN;
# endif
# ifdef UNICODE_SONG_BSD
static float song_bsd[][2] = UNICODE_SONG_BSD;
# endif
# ifdef UNICODE_SONG_WINC
static float song_winc[][2] = UNICODE_SONG_WINC;
# endif
# ifdef UNICODE_SONG_EMACS
static float song_emacs[][2] = UNICODE_SONG_EMACS;
# endif
static void unicode_play_song(uint8_t mode) {
switch (mode) {
# ifdef UNICODE_SONG_MAC
case UC_MAC:
PLAY_SONG(song_mac);
break;
# endif
# ifdef UNICODE_SONG_LNX
case UC_LNX:
PLAY_SONG(song_lnx);
break;
# endif
# ifdef UNICODE_SONG_WIN
case UC_WIN:
PLAY_SONG(song_win);
break;
# endif
# ifdef UNICODE_SONG_BSD
case UC_BSD:
PLAY_SONG(song_bsd);
break;
# endif
# ifdef UNICODE_SONG_WINC
case UC_WINC:
PLAY_SONG(song_winc);
break;
# endif
# ifdef UNICODE_SONG_EMACS
case UC_EMACS:
PLAY_SONG(song_emacs);
break;
# endif
}
}
#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
unicode_input_mode_set_kb(unicode_config.input_mode);
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();
#ifdef AUDIO_ENABLE
unicode_play_song(mode);
#endif
unicode_input_mode_set_kb(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
# ifdef AUDIO_ENABLE
unicode_play_song(unicode_config.input_mode);
# endif
unicode_input_mode_set_kb(unicode_config.input_mode);
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_led_state = host_keyboard_led_state();
// Note the order matters here!
// Need to do this before we mess around with the mods, or else
// UNICODE_KEY_LNX (which is usually Ctrl-Shift-U) might not work
// correctly in the shifted case.
if (unicode_config.input_mode == UC_LNX && unicode_saved_led_state.caps_lock) {
tap_code(KC_CAPS_LOCK);
}
unicode_saved_mods = get_mods(); // Save current mods
clear_mods(); // Unregister mods to start from a clean state
clear_weak_mods();
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:
// For increased reliability, use numpad keys for inputting digits
if (!unicode_saved_led_state.num_lock) {
tap_code(KC_NUM_LOCK);
}
register_code(KC_LEFT_ALT);
wait_ms(UNICODE_TYPE_DELAY);
tap_code(KC_KP_PLUS);
break;
case UC_WINC:
tap_code(UNICODE_KEY_WINC);
tap_code(KC_U);
break;
case UC_EMACS:
// The usual way to type unicode in emacs is C-x-8 <RET> then the unicode number in hex
tap_code16(LCTL(KC_X));
tap_code16(KC_8);
tap_code16(KC_ENTER);
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_SPACE);
if (unicode_saved_led_state.caps_lock) {
tap_code(KC_CAPS_LOCK);
}
break;
case UC_WIN:
unregister_code(KC_LEFT_ALT);
if (!unicode_saved_led_state.num_lock) {
tap_code(KC_NUM_LOCK);
}
break;
case UC_WINC:
tap_code(KC_ENTER);
break;
case UC_EMACS:
tap_code16(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:
tap_code(KC_ESCAPE);
if (unicode_saved_led_state.caps_lock) {
tap_code(KC_CAPS_LOCK);
}
break;
case UC_WINC:
tap_code(KC_ESCAPE);
break;
case UC_WIN:
unregister_code(KC_LEFT_ALT);
if (!unicode_saved_led_state.num_lock) {
tap_code(KC_NUM_LOCK);
}
break;
case UC_EMACS:
tap_code16(LCTL(KC_G)); // C-g cancels
break;
}
set_mods(unicode_saved_mods); // Reregister previously set mods
}
// clang-format off
static void send_nibble_wrapper(uint8_t digit) {
if (unicode_config.input_mode == UC_WIN) {
uint8_t kc = digit < 10
? KC_KP_1 + (10 + digit - 1) % 10
: KC_A + (digit - 10);
tap_code(kc);
return;
}
send_nibble(digit);
}
// clang-format on
void register_hex(uint16_t hex) {
for (int i = 3; i >= 0; i--) {
uint8_t digit = ((hex >> (i * 4)) & 0xF);
send_nibble_wrapper(digit);
}
}
void register_hex32(uint32_t hex) {
bool first_digit = true;
bool needs_leading_zero = (unicode_config.input_mode == UC_WINC);
for (int i = 7; i >= 0; i--) {
// Work out the digit we're going to transmit
uint8_t digit = ((hex >> (i * 4)) & 0xF);
// If we're still searching for the first digit, and found one
// that needs a leading zero sent out, send the zero.
if (first_digit && needs_leading_zero && digit > 9) {
send_nibble_wrapper(0);
}
// Always send digits (including zero) if we're down to the last
// two bytes of nibbles.
bool must_send = i < 4;
// If we've found a digit worth transmitting, do so.
if (digit != 0 || !first_digit || must_send) {
send_nibble_wrapper(digit);
first_digit = 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();
}
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);
}
}
}
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