summaryrefslogtreecommitdiffstats
path: root/quantum/process_keycode/process_unicode_common.c
blob: 80be3162320b7a6db1851b0c98e222715274d602 (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
/* 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
}

void register_hex(uint16_t hex) {
    for (int i = 3; i >= 0; i--) {
        uint8_t digit = ((hex >> (i * 4)) & 0xF);
        tap_code16(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_code16(hex_to_keycode(digit));
            }
        } else {
            tap_code16(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
}