summaryrefslogtreecommitdiffstats
path: root/quantum/unicode/unicode.c
blob: 78a4cad585949cc63644bb0a295162383c1c5ce5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/* 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"
#include "debug.h"
#include "quantum.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 UNICODE_MODE_WINCOMPOSE, UNICODE_MODE_LINUX
#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

__attribute__((weak)) void unicode_input_mode_set_user(uint8_t input_mode) {}

__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 UNICODE_MODE_MACOS:
            PLAY_SONG(song_mac);
            break;
#    endif
#    ifdef UNICODE_SONG_LNX
        case UNICODE_MODE_LINUX:
            PLAY_SONG(song_lnx);
            break;
#    endif
#    ifdef UNICODE_SONG_WIN
        case UNICODE_MODE_WINDOWS:
            PLAY_SONG(song_win);
            break;
#    endif
#    ifdef UNICODE_SONG_BSD
        case UNICODE_MODE_BSD:
            PLAY_SONG(song_bsd);
            break;
#    endif
#    ifdef UNICODE_SONG_WINC
        case UNICODE_MODE_WINCOMPOSE:
            PLAY_SONG(song_winc);
            break;
#    endif
#    ifdef UNICODE_SONG_EMACS
        case UNICODE_MODE_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;
}

static void persist_unicode_input_mode(void) {
    eeprom_update_byte(EECONFIG_UNICODEMODE, 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);
}

static 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 unicode_input_mode_step(void) {
    cycle_unicode_input_mode(1);
}

void unicode_input_mode_step_reverse(void) {
    cycle_unicode_input_mode(-1);
}

__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 == UNICODE_MODE_LINUX && 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 UNICODE_MODE_MACOS:
            register_code(UNICODE_KEY_MAC);
            break;
        case UNICODE_MODE_LINUX:
            tap_code16(UNICODE_KEY_LNX);
            break;
        case UNICODE_MODE_WINDOWS:
            // 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 UNICODE_MODE_WINCOMPOSE:
            tap_code(UNICODE_KEY_WINC);
            tap_code(KC_U);
            break;
        case UNICODE_MODE_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 UNICODE_MODE_MACOS:
            unregister_code(UNICODE_KEY_MAC);
            break;
        case UNICODE_MODE_LINUX:
            tap_code(KC_SPACE);
            if (unicode_saved_led_state.caps_lock) {
                tap_code(KC_CAPS_LOCK);
            }
            break;
        case UNICODE_MODE_WINDOWS:
            unregister_code(KC_LEFT_ALT);
            if (!unicode_saved_led_state.num_lock) {
                tap_code(KC_NUM_LOCK);
            }
            break;
        case UNICODE_MODE_WINCOMPOSE:
            tap_code(KC_ENTER);
            break;
        case UNICODE_MODE_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 UNICODE_MODE_MACOS:
            unregister_code(UNICODE_KEY_MAC);
            break;
        case UNICODE_MODE_LINUX:
            tap_code(KC_ESCAPE);
            if (unicode_saved_led_state.caps_lock) {
                tap_code(KC_CAPS_LOCK);
            }
            break;
        case UNICODE_MODE_WINCOMPOSE:
            tap_code(KC_ESCAPE);
            break;
        case UNICODE_MODE_WINDOWS:
            unregister_code(KC_LEFT_ALT);
            if (!unicode_saved_led_state.num_lock) {
                tap_code(KC_NUM_LOCK);
            }
            break;
        case UNICODE_MODE_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 == UNICODE_MODE_WINDOWS) {
        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 == UNICODE_MODE_WINCOMPOSE);
    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 == UNICODE_MODE_WINDOWS)) {
        // Code point out of range, do nothing
        return;
    }

    unicode_input_start();
    if (code_point > 0xFFFF && unicode_config.input_mode == UNICODE_MODE_MACOS) {
        // 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);
        }
    }
}