Fast and reasonably complete (framebuffer) terminal emulator (Zig fork)
pci.express
1/* Copyright (C) 2022-2024 mintsuki and contributors.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain the above copyright notice,
7 * this list of conditions and the following disclaimer.
8 *
9 * 2. Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
17 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
23 * POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <stdint.h>
27#include <stddef.h>
28#include <stdbool.h>
29
30#include "flanterm.h"
31
32// Tries to implement this standard for terminfo
33// https://man7.org/linux/man-pages/man4/console_codes.4.html
34
35static const uint32_t col256[] = {
36 0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,
37 0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af,
38 0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff,
39 0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,
40 0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,
41 0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,
42 0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,
43 0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,
44 0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,
45 0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,
46 0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af,
47 0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff,
48 0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
49 0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,
50 0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,
51 0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,
52 0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af,
53 0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff,
54 0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,
55 0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af,
56 0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,
57 0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,
58 0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af,
59 0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,
60 0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,
61 0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af,
62 0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff,
63 0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
64 0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,
65 0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee
66};
67
68#define CHARSET_DEFAULT 0
69#define CHARSET_DEC_SPECIAL 1
70
71void flanterm_context_reinit(struct flanterm_context *ctx) {
72 ctx->tab_size = 8;
73 ctx->autoflush = true;
74 ctx->cursor_enabled = true;
75 ctx->scroll_enabled = true;
76 ctx->control_sequence = false;
77 ctx->csi = false;
78 ctx->escape = false;
79 ctx->osc = false;
80 ctx->osc_escape = false;
81 ctx->rrr = false;
82 ctx->discard_next = false;
83 ctx->bold = false;
84 ctx->bg_bold = false;
85 ctx->reverse_video = false;
86 ctx->dec_private = false;
87 ctx->insert_mode = false;
88 ctx->unicode_remaining = 0;
89 ctx->g_select = 0;
90 ctx->charsets[0] = CHARSET_DEFAULT;
91 ctx->charsets[1] = CHARSET_DEC_SPECIAL;
92 ctx->current_charset = 0;
93 ctx->escape_offset = 0;
94 ctx->esc_values_i = 0;
95 ctx->saved_cursor_x = 0;
96 ctx->saved_cursor_y = 0;
97 ctx->current_primary = (size_t)-1;
98 ctx->current_bg = (size_t)-1;
99 ctx->scroll_top_margin = 0;
100 ctx->scroll_bottom_margin = ctx->rows;
101 ctx->oob_output = FLANTERM_OOB_OUTPUT_ONLCR;
102}
103
104static void flanterm_putchar(struct flanterm_context *ctx, uint8_t c);
105
106void flanterm_write(struct flanterm_context *ctx, const char *buf, size_t count) {
107 for (size_t i = 0; i < count; i++) {
108 flanterm_putchar(ctx, buf[i]);
109 }
110
111 if (ctx->autoflush) {
112 ctx->double_buffer_flush(ctx);
113 }
114}
115
116static void sgr(struct flanterm_context *ctx) {
117 size_t i = 0;
118
119 if (!ctx->esc_values_i)
120 goto def;
121
122 for (; i < ctx->esc_values_i; i++) {
123 size_t offset;
124
125 if (ctx->esc_values[i] == 0) {
126def:
127 if (ctx->reverse_video) {
128 ctx->reverse_video = false;
129 ctx->swap_palette(ctx);
130 }
131 ctx->bold = false;
132 ctx->bg_bold = false;
133 ctx->current_primary = (size_t)-1;
134 ctx->current_bg = (size_t)-1;
135 ctx->set_text_bg_default(ctx);
136 ctx->set_text_fg_default(ctx);
137 continue;
138 }
139
140 else if (ctx->esc_values[i] == 1) {
141 ctx->bold = true;
142 if (ctx->current_primary != (size_t)-1) {
143 if (!ctx->reverse_video) {
144 ctx->set_text_fg_bright(ctx, ctx->current_primary);
145 } else {
146 ctx->set_text_bg_bright(ctx, ctx->current_primary);
147 }
148 } else {
149 if (!ctx->reverse_video) {
150 ctx->set_text_fg_default_bright(ctx);
151 } else {
152 ctx->set_text_bg_default_bright(ctx);
153 }
154 }
155 continue;
156 }
157
158 else if (ctx->esc_values[i] == 5) {
159 ctx->bg_bold = true;
160 if (ctx->current_bg != (size_t)-1) {
161 if (!ctx->reverse_video) {
162 ctx->set_text_bg_bright(ctx, ctx->current_bg);
163 } else {
164 ctx->set_text_fg_bright(ctx, ctx->current_bg);
165 }
166 } else {
167 if (!ctx->reverse_video) {
168 ctx->set_text_bg_default_bright(ctx);
169 } else {
170 ctx->set_text_fg_default_bright(ctx);
171 }
172 }
173 continue;
174 }
175
176 else if (ctx->esc_values[i] == 22) {
177 ctx->bold = false;
178 if (ctx->current_primary != (size_t)-1) {
179 if (!ctx->reverse_video) {
180 ctx->set_text_fg(ctx, ctx->current_primary);
181 } else {
182 ctx->set_text_bg(ctx, ctx->current_primary);
183 }
184 } else {
185 if (!ctx->reverse_video) {
186 ctx->set_text_fg_default(ctx);
187 } else {
188 ctx->set_text_bg_default(ctx);
189 }
190 }
191 continue;
192 }
193
194 else if (ctx->esc_values[i] == 25) {
195 ctx->bg_bold = false;
196 if (ctx->current_bg != (size_t)-1) {
197 if (!ctx->reverse_video) {
198 ctx->set_text_bg(ctx, ctx->current_bg);
199 } else {
200 ctx->set_text_fg(ctx, ctx->current_bg);
201 }
202 } else {
203 if (!ctx->reverse_video) {
204 ctx->set_text_bg_default(ctx);
205 } else {
206 ctx->set_text_fg_default(ctx);
207 }
208 }
209 continue;
210 }
211
212 else if (ctx->esc_values[i] >= 30 && ctx->esc_values[i] <= 37) {
213 offset = 30;
214 ctx->current_primary = ctx->esc_values[i] - offset;
215
216 if (ctx->reverse_video) {
217 goto set_bg;
218 }
219
220set_fg:
221 if ((ctx->bold && !ctx->reverse_video)
222 || (ctx->bg_bold && ctx->reverse_video)) {
223 ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);
224 } else {
225 ctx->set_text_fg(ctx, ctx->esc_values[i] - offset);
226 }
227 continue;
228 }
229
230 else if (ctx->esc_values[i] >= 40 && ctx->esc_values[i] <= 47) {
231 offset = 40;
232 ctx->current_bg = ctx->esc_values[i] - offset;
233
234 if (ctx->reverse_video) {
235 goto set_fg;
236 }
237
238set_bg:
239 if ((ctx->bold && ctx->reverse_video)
240 || (ctx->bg_bold && !ctx->reverse_video)) {
241 ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);
242 } else {
243 ctx->set_text_bg(ctx, ctx->esc_values[i] - offset);
244 }
245 continue;
246 }
247
248 else if (ctx->esc_values[i] >= 90 && ctx->esc_values[i] <= 97) {
249 offset = 90;
250 ctx->current_primary = ctx->esc_values[i] - offset;
251
252 if (ctx->reverse_video) {
253 goto set_bg_bright;
254 }
255
256set_fg_bright:
257 ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);
258 continue;
259 }
260
261 else if (ctx->esc_values[i] >= 100 && ctx->esc_values[i] <= 107) {
262 offset = 100;
263 ctx->current_bg = ctx->esc_values[i] - offset;
264
265 if (ctx->reverse_video) {
266 goto set_fg_bright;
267 }
268
269set_bg_bright:
270 ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);
271 continue;
272 }
273
274 else if (ctx->esc_values[i] == 39) {
275 ctx->current_primary = (size_t)-1;
276
277 if (ctx->reverse_video) {
278 ctx->swap_palette(ctx);
279 }
280
281 if (!ctx->bold) {
282 ctx->set_text_fg_default(ctx);
283 } else {
284 ctx->set_text_fg_default_bright(ctx);
285 }
286
287 if (ctx->reverse_video) {
288 ctx->swap_palette(ctx);
289 }
290
291 continue;
292 }
293
294 else if (ctx->esc_values[i] == 49) {
295 ctx->current_bg = (size_t)-1;
296
297 if (ctx->reverse_video) {
298 ctx->swap_palette(ctx);
299 }
300
301 if (!ctx->bg_bold) {
302 ctx->set_text_bg_default(ctx);
303 } else {
304 ctx->set_text_bg_default_bright(ctx);
305 }
306
307 if (ctx->reverse_video) {
308 ctx->swap_palette(ctx);
309 }
310
311 continue;
312 }
313
314 else if (ctx->esc_values[i] == 7) {
315 if (!ctx->reverse_video) {
316 ctx->reverse_video = true;
317 ctx->swap_palette(ctx);
318 }
319 continue;
320 }
321
322 else if (ctx->esc_values[i] == 27) {
323 if (ctx->reverse_video) {
324 ctx->reverse_video = false;
325 ctx->swap_palette(ctx);
326 }
327 continue;
328 }
329
330 // 256/RGB
331 else if (ctx->esc_values[i] == 38 || ctx->esc_values[i] == 48) {
332 bool fg = ctx->esc_values[i] == 38;
333
334 i++;
335 if (i >= ctx->esc_values_i) {
336 break;
337 }
338
339 switch (ctx->esc_values[i]) {
340 case 2: { // RGB
341 if (i + 3 >= ctx->esc_values_i) {
342 goto out;
343 }
344
345 uint32_t rgb_value = 0;
346
347 rgb_value |= ctx->esc_values[i + 1] << 16;
348 rgb_value |= ctx->esc_values[i + 2] << 8;
349 rgb_value |= ctx->esc_values[i + 3];
350
351 i += 3;
352
353 (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);
354
355 break;
356 }
357 case 5: { // 256 colors
358 if (i + 1 >= ctx->esc_values_i) {
359 goto out;
360 }
361
362 uint32_t col = ctx->esc_values[i + 1];
363
364 i++;
365
366 if (col < 8) {
367 (fg ? ctx->set_text_fg : ctx->set_text_bg)(ctx, col);
368 } else if (col < 16) {
369 (fg ? ctx->set_text_fg_bright : ctx->set_text_bg_bright)(ctx, col - 8);
370 } else if (col < 256) {
371 uint32_t rgb_value = col256[col - 16];
372 (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);
373 }
374
375 break;
376 }
377 default: continue;
378 }
379 }
380 }
381
382out:;
383}
384
385static void dec_private_parse(struct flanterm_context *ctx, uint8_t c) {
386 ctx->dec_private = false;
387
388 if (ctx->esc_values_i == 0) {
389 return;
390 }
391
392 bool set;
393
394 switch (c) {
395 case 'h':
396 set = true; break;
397 case 'l':
398 set = false; break;
399 default:
400 return;
401 }
402
403 switch (ctx->esc_values[0]) {
404 case 25: {
405 if (set) {
406 ctx->cursor_enabled = true;
407 } else {
408 ctx->cursor_enabled = false;
409 }
410 return;
411 }
412 }
413
414 if (ctx->callback != NULL) {
415 ctx->callback(ctx, FLANTERM_CB_DEC, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);
416 }
417}
418
419static void linux_private_parse(struct flanterm_context *ctx) {
420 if (ctx->esc_values_i == 0) {
421 return;
422 }
423
424 if (ctx->callback != NULL) {
425 ctx->callback(ctx, FLANTERM_CB_LINUX, ctx->esc_values_i, (uintptr_t)ctx->esc_values, 0);
426 }
427}
428
429static void mode_toggle(struct flanterm_context *ctx, uint8_t c) {
430 if (ctx->esc_values_i == 0) {
431 return;
432 }
433
434 bool set;
435
436 switch (c) {
437 case 'h':
438 set = true; break;
439 case 'l':
440 set = false; break;
441 default:
442 return;
443 }
444
445 switch (ctx->esc_values[0]) {
446 case 4:
447 ctx->insert_mode = set; return;
448 }
449
450 if (ctx->callback != NULL) {
451 ctx->callback(ctx, FLANTERM_CB_MODE, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);
452 }
453}
454
455static void osc_parse(struct flanterm_context *ctx, uint8_t c) {
456 if (ctx->osc_escape && c == '\\') {
457 goto cleanup;
458 }
459
460 ctx->osc_escape = false;
461
462 switch (c) {
463 case 0x1b:
464 ctx->osc_escape = true;
465 break;
466 case '\a':
467 goto cleanup;
468 }
469
470 return;
471
472cleanup:
473 ctx->osc_escape = false;
474 ctx->osc = false;
475 ctx->escape = false;
476}
477
478static void control_sequence_parse(struct flanterm_context *ctx, uint8_t c) {
479 if (ctx->escape_offset == 2) {
480 switch (c) {
481 case '[':
482 ctx->discard_next = true;
483 goto cleanup;
484 case '?':
485 ctx->dec_private = true;
486 return;
487 }
488 }
489
490 if (c >= '0' && c <= '9') {
491 if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) {
492 return;
493 }
494 ctx->rrr = true;
495 ctx->esc_values[ctx->esc_values_i] *= 10;
496 ctx->esc_values[ctx->esc_values_i] += c - '0';
497 return;
498 }
499
500 if (ctx->rrr == true) {
501 ctx->esc_values_i++;
502 ctx->rrr = false;
503 if (c == ';')
504 return;
505 } else if (c == ';') {
506 if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) {
507 return;
508 }
509 ctx->esc_values[ctx->esc_values_i] = 0;
510 ctx->esc_values_i++;
511 return;
512 }
513
514 size_t esc_default;
515 switch (c) {
516 case 'J': case 'K': case 'q':
517 esc_default = 0; break;
518 default:
519 esc_default = 1; break;
520 }
521
522 for (size_t i = ctx->esc_values_i; i < FLANTERM_MAX_ESC_VALUES; i++) {
523 ctx->esc_values[i] = esc_default;
524 }
525
526 if (ctx->dec_private == true) {
527 dec_private_parse(ctx, c);
528 goto cleanup;
529 }
530
531 bool r = ctx->scroll_enabled;
532 ctx->scroll_enabled = false;
533 size_t x, y;
534 ctx->get_cursor_pos(ctx, &x, &y);
535
536 switch (c) {
537 case 'F':
538 x = 0;
539 // FALLTHRU
540 case 'A': {
541 if (ctx->esc_values[0] > y)
542 ctx->esc_values[0] = y;
543 size_t orig_y = y;
544 size_t dest_y = y - ctx->esc_values[0];
545 bool will_be_in_scroll_region = false;
546 if ((ctx->scroll_top_margin >= dest_y && ctx->scroll_top_margin <= orig_y)
547 || (ctx->scroll_bottom_margin >= dest_y && ctx->scroll_bottom_margin <= orig_y)) {
548 will_be_in_scroll_region = true;
549 }
550 if (will_be_in_scroll_region && dest_y < ctx->scroll_top_margin) {
551 dest_y = ctx->scroll_top_margin;
552 }
553 ctx->set_cursor_pos(ctx, x, dest_y);
554 break;
555 }
556 case 'E':
557 x = 0;
558 // FALLTHRU
559 case 'e':
560 case 'B': {
561 if (y + ctx->esc_values[0] > ctx->rows - 1)
562 ctx->esc_values[0] = (ctx->rows - 1) - y;
563 size_t orig_y = y;
564 size_t dest_y = y + ctx->esc_values[0];
565 bool will_be_in_scroll_region = false;
566 if ((ctx->scroll_top_margin >= orig_y && ctx->scroll_top_margin <= dest_y)
567 || (ctx->scroll_bottom_margin >= orig_y && ctx->scroll_bottom_margin <= dest_y)) {
568 will_be_in_scroll_region = true;
569 }
570 if (will_be_in_scroll_region && dest_y >= ctx->scroll_bottom_margin) {
571 dest_y = ctx->scroll_bottom_margin - 1;
572 }
573 ctx->set_cursor_pos(ctx, x, dest_y);
574 break;
575 }
576 case 'a':
577 case 'C':
578 if (x + ctx->esc_values[0] > ctx->cols - 1)
579 ctx->esc_values[0] = (ctx->cols - 1) - x;
580 ctx->set_cursor_pos(ctx, x + ctx->esc_values[0], y);
581 break;
582 case 'D':
583 if (ctx->esc_values[0] > x)
584 ctx->esc_values[0] = x;
585 ctx->set_cursor_pos(ctx, x - ctx->esc_values[0], y);
586 break;
587 case 'c':
588 if (ctx->callback != NULL) {
589 ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0);
590 }
591 break;
592 case 'd':
593 ctx->esc_values[0] -= 1;
594 if (ctx->esc_values[0] >= ctx->rows)
595 ctx->esc_values[0] = ctx->rows - 1;
596 ctx->set_cursor_pos(ctx, x, ctx->esc_values[0]);
597 break;
598 case 'G':
599 case '`':
600 ctx->esc_values[0] -= 1;
601 if (ctx->esc_values[0] >= ctx->cols)
602 ctx->esc_values[0] = ctx->cols - 1;
603 ctx->set_cursor_pos(ctx, ctx->esc_values[0], y);
604 break;
605 case 'H':
606 case 'f':
607 if (ctx->esc_values[0] != 0) {
608 ctx->esc_values[0]--;
609 }
610 if (ctx->esc_values[1] != 0) {
611 ctx->esc_values[1]--;
612 }
613 if (ctx->esc_values[1] >= ctx->cols)
614 ctx->esc_values[1] = ctx->cols - 1;
615 if (ctx->esc_values[0] >= ctx->rows)
616 ctx->esc_values[0] = ctx->rows - 1;
617 ctx->set_cursor_pos(ctx, ctx->esc_values[1], ctx->esc_values[0]);
618 break;
619 case 'M': {
620 size_t count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0];
621 for (size_t i = 0; i < count; i++) {
622 ctx->scroll(ctx);
623 }
624 break;
625 }
626 case 'L': {
627 size_t old_scroll_top_margin = ctx->scroll_top_margin;
628 ctx->scroll_top_margin = y;
629 size_t count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0];
630 for (size_t i = 0; i < count; i++) {
631 ctx->revscroll(ctx);
632 }
633 ctx->scroll_top_margin = old_scroll_top_margin;
634 break;
635 }
636 case 'n':
637 switch (ctx->esc_values[0]) {
638 case 5:
639 if (ctx->callback != NULL) {
640 ctx->callback(ctx, FLANTERM_CB_STATUS_REPORT, 0, 0, 0);
641 }
642 break;
643 case 6:
644 if (ctx->callback != NULL) {
645 ctx->callback(ctx, FLANTERM_CB_POS_REPORT, x + 1, y + 1, 0);
646 }
647 break;
648 }
649 break;
650 case 'q':
651 if (ctx->callback != NULL) {
652 ctx->callback(ctx, FLANTERM_CB_KBD_LEDS, ctx->esc_values[0], 0, 0);
653 }
654 break;
655 case 'J':
656 switch (ctx->esc_values[0]) {
657 case 0: {
658 size_t rows_remaining = ctx->rows - (y + 1);
659 size_t cols_diff = ctx->cols - (x + 1);
660 size_t to_clear = rows_remaining * ctx->cols + cols_diff + 1;
661 for (size_t i = 0; i < to_clear; i++) {
662 ctx->raw_putchar(ctx, ' ');
663 }
664 ctx->set_cursor_pos(ctx, x, y);
665 break;
666 }
667 case 1: {
668 ctx->set_cursor_pos(ctx, 0, 0);
669 bool b = false;
670 for (size_t yc = 0; yc < ctx->rows; yc++) {
671 for (size_t xc = 0; xc < ctx->cols; xc++) {
672 ctx->raw_putchar(ctx, ' ');
673 if (xc == x && yc == y) {
674 ctx->set_cursor_pos(ctx, x, y);
675 b = true;
676 break;
677 }
678 }
679 if (b == true)
680 break;
681 }
682 break;
683 }
684 case 2:
685 case 3:
686 ctx->clear(ctx, false);
687 break;
688 }
689 break;
690 case '@':
691 for (size_t i = ctx->cols - 1; ; i--) {
692 ctx->move_character(ctx, i + ctx->esc_values[0], y, i, y);
693 ctx->set_cursor_pos(ctx, i, y);
694 ctx->raw_putchar(ctx, ' ');
695 if (i == x) {
696 break;
697 }
698 }
699 ctx->set_cursor_pos(ctx, x, y);
700 break;
701 case 'P':
702 for (size_t i = x + ctx->esc_values[0]; i < ctx->cols; i++)
703 ctx->move_character(ctx, i - ctx->esc_values[0], y, i, y);
704 ctx->set_cursor_pos(ctx, ctx->cols - ctx->esc_values[0], y);
705 // FALLTHRU
706 case 'X': {
707 size_t count = ctx->esc_values[0] > ctx->cols ? ctx->cols : ctx->esc_values[0];
708 for (size_t i = 0; i < count; i++)
709 ctx->raw_putchar(ctx, ' ');
710 ctx->set_cursor_pos(ctx, x, y);
711 break;
712 }
713 case 'm':
714 sgr(ctx);
715 break;
716 case 's':
717 ctx->get_cursor_pos(ctx, &ctx->saved_cursor_x, &ctx->saved_cursor_y);
718 break;
719 case 'u':
720 ctx->set_cursor_pos(ctx, ctx->saved_cursor_x, ctx->saved_cursor_y);
721 break;
722 case 'K':
723 switch (ctx->esc_values[0]) {
724 case 0: {
725 for (size_t i = x; i < ctx->cols; i++)
726 ctx->raw_putchar(ctx, ' ');
727 ctx->set_cursor_pos(ctx, x, y);
728 break;
729 }
730 case 1: {
731 ctx->set_cursor_pos(ctx, 0, y);
732 for (size_t i = 0; i < x; i++)
733 ctx->raw_putchar(ctx, ' ');
734 break;
735 }
736 case 2: {
737 ctx->set_cursor_pos(ctx, 0, y);
738 for (size_t i = 0; i < ctx->cols; i++)
739 ctx->raw_putchar(ctx, ' ');
740 ctx->set_cursor_pos(ctx, x, y);
741 break;
742 }
743 }
744 break;
745 case 'r':
746 if (ctx->esc_values[0] == 0) {
747 ctx->esc_values[0] = 1;
748 }
749 if (ctx->esc_values[1] == 0) {
750 ctx->esc_values[1] = 1;
751 }
752 ctx->scroll_top_margin = 0;
753 ctx->scroll_bottom_margin = ctx->rows;
754 if (ctx->esc_values_i > 0) {
755 ctx->scroll_top_margin = ctx->esc_values[0] - 1;
756 }
757 if (ctx->esc_values_i > 1) {
758 ctx->scroll_bottom_margin = ctx->esc_values[1];
759 }
760 if (ctx->scroll_top_margin >= ctx->rows
761 || ctx->scroll_bottom_margin > ctx->rows
762 || ctx->scroll_top_margin >= (ctx->scroll_bottom_margin - 1)) {
763 ctx->scroll_top_margin = 0;
764 ctx->scroll_bottom_margin = ctx->rows;
765 }
766 ctx->set_cursor_pos(ctx, 0, 0);
767 break;
768 case 'l':
769 case 'h':
770 mode_toggle(ctx, c);
771 break;
772 case ']':
773 linux_private_parse(ctx);
774 break;
775 }
776
777 ctx->scroll_enabled = r;
778
779cleanup:
780 ctx->control_sequence = false;
781 ctx->escape = false;
782}
783
784static void restore_state(struct flanterm_context *ctx) {
785 ctx->bold = ctx->saved_state_bold;
786 ctx->bg_bold = ctx->saved_state_bg_bold;
787 ctx->reverse_video = ctx->saved_state_reverse_video;
788 ctx->current_charset = ctx->saved_state_current_charset;
789 ctx->current_primary = ctx->saved_state_current_primary;
790 ctx->current_bg = ctx->saved_state_current_bg;
791
792 ctx->restore_state(ctx);
793}
794
795static void save_state(struct flanterm_context *ctx) {
796 ctx->save_state(ctx);
797
798 ctx->saved_state_bold = ctx->bold;
799 ctx->saved_state_bg_bold = ctx->bg_bold;
800 ctx->saved_state_reverse_video = ctx->reverse_video;
801 ctx->saved_state_current_charset = ctx->current_charset;
802 ctx->saved_state_current_primary = ctx->current_primary;
803 ctx->saved_state_current_bg = ctx->current_bg;
804}
805
806static void escape_parse(struct flanterm_context *ctx, uint8_t c) {
807 ctx->escape_offset++;
808
809 if (ctx->osc == true) {
810 osc_parse(ctx, c);
811 return;
812 }
813
814 if (ctx->control_sequence == true) {
815 control_sequence_parse(ctx, c);
816 return;
817 }
818
819 if (ctx->csi == true) {
820 ctx->csi = false;
821 goto is_csi;
822 }
823
824 size_t x, y;
825 ctx->get_cursor_pos(ctx, &x, &y);
826
827 switch (c) {
828 case ']':
829 ctx->osc_escape = false;
830 ctx->osc = true;
831 return;
832 case '[':
833is_csi:
834 for (size_t i = 0; i < FLANTERM_MAX_ESC_VALUES; i++)
835 ctx->esc_values[i] = 0;
836 ctx->esc_values_i = 0;
837 ctx->rrr = false;
838 ctx->control_sequence = true;
839 return;
840 case '7':
841 save_state(ctx);
842 break;
843 case '8':
844 restore_state(ctx);
845 break;
846 case 'c':
847 flanterm_context_reinit(ctx);
848 ctx->clear(ctx, true);
849 break;
850 case 'D':
851 if (y == ctx->scroll_bottom_margin - 1) {
852 ctx->scroll(ctx);
853 ctx->set_cursor_pos(ctx, x, y);
854 } else {
855 ctx->set_cursor_pos(ctx, x, y + 1);
856 }
857 break;
858 case 'E':
859 if (y == ctx->scroll_bottom_margin - 1) {
860 ctx->scroll(ctx);
861 ctx->set_cursor_pos(ctx, 0, y);
862 } else {
863 ctx->set_cursor_pos(ctx, 0, y + 1);
864 }
865 break;
866 case 'M':
867 // "Reverse linefeed"
868 if (y == ctx->scroll_top_margin) {
869 ctx->revscroll(ctx);
870 ctx->set_cursor_pos(ctx, 0, y);
871 } else {
872 ctx->set_cursor_pos(ctx, 0, y - 1);
873 }
874 break;
875 case 'Z':
876 if (ctx->callback != NULL) {
877 ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0);
878 }
879 break;
880 case '(':
881 case ')':
882 ctx->g_select = c - '\'';
883 break;
884 }
885
886 ctx->escape = false;
887}
888
889static bool dec_special_print(struct flanterm_context *ctx, uint8_t c) {
890#define FLANTERM_DEC_SPCL_PRN(C) ctx->raw_putchar(ctx, (C)); return true;
891 switch (c) {
892 case '`': FLANTERM_DEC_SPCL_PRN(0x04)
893 case '0': FLANTERM_DEC_SPCL_PRN(0xdb)
894 case '-': FLANTERM_DEC_SPCL_PRN(0x18)
895 case ',': FLANTERM_DEC_SPCL_PRN(0x1b)
896 case '.': FLANTERM_DEC_SPCL_PRN(0x19)
897 case 'a': FLANTERM_DEC_SPCL_PRN(0xb1)
898 case 'f': FLANTERM_DEC_SPCL_PRN(0xf8)
899 case 'g': FLANTERM_DEC_SPCL_PRN(0xf1)
900 case 'h': FLANTERM_DEC_SPCL_PRN(0xb0)
901 case 'j': FLANTERM_DEC_SPCL_PRN(0xd9)
902 case 'k': FLANTERM_DEC_SPCL_PRN(0xbf)
903 case 'l': FLANTERM_DEC_SPCL_PRN(0xda)
904 case 'm': FLANTERM_DEC_SPCL_PRN(0xc0)
905 case 'n': FLANTERM_DEC_SPCL_PRN(0xc5)
906 case 'q': FLANTERM_DEC_SPCL_PRN(0xc4)
907 case 's': FLANTERM_DEC_SPCL_PRN(0x5f)
908 case 't': FLANTERM_DEC_SPCL_PRN(0xc3)
909 case 'u': FLANTERM_DEC_SPCL_PRN(0xb4)
910 case 'v': FLANTERM_DEC_SPCL_PRN(0xc1)
911 case 'w': FLANTERM_DEC_SPCL_PRN(0xc2)
912 case 'x': FLANTERM_DEC_SPCL_PRN(0xb3)
913 case 'y': FLANTERM_DEC_SPCL_PRN(0xf3)
914 case 'z': FLANTERM_DEC_SPCL_PRN(0xf2)
915 case '~': FLANTERM_DEC_SPCL_PRN(0xfa)
916 case '_': FLANTERM_DEC_SPCL_PRN(0xff)
917 case '+': FLANTERM_DEC_SPCL_PRN(0x1a)
918 case '{': FLANTERM_DEC_SPCL_PRN(0xe3)
919 case '}': FLANTERM_DEC_SPCL_PRN(0x9c)
920 }
921#undef FLANTERM_DEC_SPCL_PRN
922
923 return false;
924}
925
926// Following wcwidth related code inherited from:
927// https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
928
929struct interval {
930 uint32_t first;
931 uint32_t last;
932};
933
934/* auxiliary function for binary search in interval table */
935static int bisearch(uint32_t ucs, const struct interval *table, int max) {
936 int min = 0;
937 int mid;
938
939 if (ucs < table[0].first || ucs > table[max].last)
940 return 0;
941 while (max >= min) {
942 mid = (min + max) / 2;
943 if (ucs > table[mid].last)
944 min = mid + 1;
945 else if (ucs < table[mid].first)
946 max = mid - 1;
947 else
948 return 1;
949 }
950
951 return 0;
952}
953
954int mk_wcwidth(uint32_t ucs) {
955 /* sorted list of non-overlapping intervals of non-spacing characters */
956 /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
957 static const struct interval combining[] = {
958 { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 },
959 { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
960 { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 },
961 { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 },
962 { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
963 { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
964 { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 },
965 { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D },
966 { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 },
967 { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD },
968 { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C },
969 { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D },
970 { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC },
971 { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD },
972 { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C },
973 { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D },
974 { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 },
975 { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 },
976 { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC },
977 { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
978 { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D },
979 { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 },
980 { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E },
981 { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC },
982 { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 },
983 { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E },
984 { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 },
985 { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 },
986 { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 },
987 { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F },
988 { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 },
989 { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD },
990 { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD },
991 { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 },
992 { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B },
993 { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 },
994 { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 },
995 { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF },
996 { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 },
997 { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F },
998 { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B },
999 { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F },
1000 { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB },
1001 { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F },
1002 { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 },
1003 { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD },
1004 { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F },
1005 { 0xE0100, 0xE01EF }
1006 };
1007
1008 /* test for 8-bit control characters */
1009 if (ucs == 0)
1010 return 0;
1011 if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
1012 return 1;
1013
1014 /* binary search in table of non-spacing characters */
1015 if (bisearch(ucs, combining,
1016 sizeof(combining) / sizeof(struct interval) - 1))
1017 return 0;
1018
1019 /* if we arrive here, ucs is not a combining or C0/C1 control character */
1020
1021 return 1 +
1022 (ucs >= 0x1100 &&
1023 (ucs <= 0x115f || /* Hangul Jamo init. consonants */
1024 ucs == 0x2329 || ucs == 0x232a ||
1025 (ucs >= 0x2e80 && ucs <= 0xa4cf &&
1026 ucs != 0x303f) || /* CJK ... Yi */
1027 (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
1028 (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
1029 (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */
1030 (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
1031 (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */
1032 (ucs >= 0xffe0 && ucs <= 0xffe6) ||
1033 (ucs >= 0x20000 && ucs <= 0x2fffd) ||
1034 (ucs >= 0x30000 && ucs <= 0x3fffd)));
1035}
1036
1037// End of https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c inherited code
1038
1039static int unicode_to_cp437(uint64_t code_point) {
1040 switch (code_point) {
1041 case 0x263a: return 1;
1042 case 0x263b: return 2;
1043 case 0x2665: return 3;
1044 case 0x2666: return 4;
1045 case 0x2663: return 5;
1046 case 0x2660: return 6;
1047 case 0x2022: return 7;
1048 case 0x25d8: return 8;
1049 case 0x25cb: return 9;
1050 case 0x25d9: return 10;
1051 case 0x2642: return 11;
1052 case 0x2640: return 12;
1053 case 0x266a: return 13;
1054 case 0x266b: return 14;
1055 case 0x263c: return 15;
1056 case 0x25ba: return 16;
1057 case 0x25c4: return 17;
1058 case 0x2195: return 18;
1059 case 0x203c: return 19;
1060 case 0x00b6: return 20;
1061 case 0x00a7: return 21;
1062 case 0x25ac: return 22;
1063 case 0x21a8: return 23;
1064 case 0x2191: return 24;
1065 case 0x2193: return 25;
1066 case 0x2192: return 26;
1067 case 0x2190: return 27;
1068 case 0x221f: return 28;
1069 case 0x2194: return 29;
1070 case 0x25b2: return 30;
1071 case 0x25bc: return 31;
1072
1073 case 0x2302: return 127;
1074 case 0x00c7: return 128;
1075 case 0x00fc: return 129;
1076 case 0x00e9: return 130;
1077 case 0x00e2: return 131;
1078 case 0x00e4: return 132;
1079 case 0x00e0: return 133;
1080 case 0x00e5: return 134;
1081 case 0x00e7: return 135;
1082 case 0x00ea: return 136;
1083 case 0x00eb: return 137;
1084 case 0x00e8: return 138;
1085 case 0x00ef: return 139;
1086 case 0x00ee: return 140;
1087 case 0x00ec: return 141;
1088 case 0x00c4: return 142;
1089 case 0x00c5: return 143;
1090 case 0x00c9: return 144;
1091 case 0x00e6: return 145;
1092 case 0x00c6: return 146;
1093 case 0x00f4: return 147;
1094 case 0x00f6: return 148;
1095 case 0x00f2: return 149;
1096 case 0x00fb: return 150;
1097 case 0x00f9: return 151;
1098 case 0x00ff: return 152;
1099 case 0x00d6: return 153;
1100 case 0x00dc: return 154;
1101 case 0x00a2: return 155;
1102 case 0x00a3: return 156;
1103 case 0x00a5: return 157;
1104 case 0x20a7: return 158;
1105 case 0x0192: return 159;
1106 case 0x00e1: return 160;
1107 case 0x00ed: return 161;
1108 case 0x00f3: return 162;
1109 case 0x00fa: return 163;
1110 case 0x00f1: return 164;
1111 case 0x00d1: return 165;
1112 case 0x00aa: return 166;
1113 case 0x00ba: return 167;
1114 case 0x00bf: return 168;
1115 case 0x2310: return 169;
1116 case 0x00ac: return 170;
1117 case 0x00bd: return 171;
1118 case 0x00bc: return 172;
1119 case 0x00a1: return 173;
1120 case 0x00ab: return 174;
1121 case 0x00bb: return 175;
1122 case 0x2591: return 176;
1123 case 0x2592: return 177;
1124 case 0x2593: return 178;
1125 case 0x2502: return 179;
1126 case 0x2524: return 180;
1127 case 0x2561: return 181;
1128 case 0x2562: return 182;
1129 case 0x2556: return 183;
1130 case 0x2555: return 184;
1131 case 0x2563: return 185;
1132 case 0x2551: return 186;
1133 case 0x2557: return 187;
1134 case 0x255d: return 188;
1135 case 0x255c: return 189;
1136 case 0x255b: return 190;
1137 case 0x2510: return 191;
1138 case 0x2514: return 192;
1139 case 0x2534: return 193;
1140 case 0x252c: return 194;
1141 case 0x251c: return 195;
1142 case 0x2500: return 196;
1143 case 0x253c: return 197;
1144 case 0x255e: return 198;
1145 case 0x255f: return 199;
1146 case 0x255a: return 200;
1147 case 0x2554: return 201;
1148 case 0x2569: return 202;
1149 case 0x2566: return 203;
1150 case 0x2560: return 204;
1151 case 0x2550: return 205;
1152 case 0x256c: return 206;
1153 case 0x2567: return 207;
1154 case 0x2568: return 208;
1155 case 0x2564: return 209;
1156 case 0x2565: return 210;
1157 case 0x2559: return 211;
1158 case 0x2558: return 212;
1159 case 0x2552: return 213;
1160 case 0x2553: return 214;
1161 case 0x256b: return 215;
1162 case 0x256a: return 216;
1163 case 0x2518: return 217;
1164 case 0x250c: return 218;
1165 case 0x2588: return 219;
1166 case 0x2584: return 220;
1167 case 0x258c: return 221;
1168 case 0x2590: return 222;
1169 case 0x2580: return 223;
1170 case 0x03b1: return 224;
1171 case 0x00df: return 225;
1172 case 0x0393: return 226;
1173 case 0x03c0: return 227;
1174 case 0x03a3: return 228;
1175 case 0x03c3: return 229;
1176 case 0x00b5: return 230;
1177 case 0x03c4: return 231;
1178 case 0x03a6: return 232;
1179 case 0x0398: return 233;
1180 case 0x03a9: return 234;
1181 case 0x03b4: return 235;
1182 case 0x221e: return 236;
1183 case 0x03c6: return 237;
1184 case 0x03b5: return 238;
1185 case 0x2229: return 239;
1186 case 0x2261: return 240;
1187 case 0x00b1: return 241;
1188 case 0x2265: return 242;
1189 case 0x2264: return 243;
1190 case 0x2320: return 244;
1191 case 0x2321: return 245;
1192 case 0x00f7: return 246;
1193 case 0x2248: return 247;
1194 case 0x00b0: return 248;
1195 case 0x2219: return 249;
1196 case 0x00b7: return 250;
1197 case 0x221a: return 251;
1198 case 0x207f: return 252;
1199 case 0x00b2: return 253;
1200 case 0x25a0: return 254;
1201 }
1202
1203 return -1;
1204}
1205
1206static void flanterm_putchar(struct flanterm_context *ctx, uint8_t c) {
1207 if (ctx->discard_next || (c == 0x18 || c == 0x1a)) {
1208 ctx->discard_next = false;
1209 ctx->escape = false;
1210 ctx->csi = false;
1211 ctx->control_sequence = false;
1212 ctx->unicode_remaining = 0;
1213 ctx->osc = false;
1214 ctx->osc_escape = false;
1215 ctx->g_select = 0;
1216 return;
1217 }
1218
1219 if (ctx->unicode_remaining != 0) {
1220 if ((c & 0xc0) != 0x80) {
1221 ctx->unicode_remaining = 0;
1222 goto unicode_error;
1223 }
1224
1225 ctx->unicode_remaining--;
1226 ctx->code_point |= (uint64_t)(c & 0x3f) << (6 * ctx->unicode_remaining);
1227 if (ctx->unicode_remaining != 0) {
1228 return;
1229 }
1230
1231 int cc = unicode_to_cp437(ctx->code_point);
1232
1233 if (cc == -1) {
1234 size_t replacement_width = (size_t)mk_wcwidth(ctx->code_point);
1235 if (replacement_width > 0) {
1236 ctx->raw_putchar(ctx, 0xfe);
1237 }
1238 for (size_t i = 1; i < replacement_width; i++) {
1239 ctx->raw_putchar(ctx, ' ');
1240 }
1241 } else {
1242 ctx->raw_putchar(ctx, cc);
1243 }
1244 return;
1245 }
1246
1247unicode_error:
1248 if (c >= 0xc0 && c <= 0xf7) {
1249 if (c >= 0xc0 && c <= 0xdf) {
1250 ctx->unicode_remaining = 1;
1251 ctx->code_point = (uint64_t)(c & 0x1f) << 6;
1252 } else if (c >= 0xe0 && c <= 0xef) {
1253 ctx->unicode_remaining = 2;
1254 ctx->code_point = (uint64_t)(c & 0x0f) << (6 * 2);
1255 } else if (c >= 0xf0 && c <= 0xf7) {
1256 ctx->unicode_remaining = 3;
1257 ctx->code_point = (uint64_t)(c & 0x07) << (6 * 3);
1258 }
1259 return;
1260 }
1261
1262 if (ctx->escape == true) {
1263 escape_parse(ctx, c);
1264 return;
1265 }
1266
1267 if (ctx->g_select) {
1268 ctx->g_select--;
1269 switch (c) {
1270 case 'B':
1271 ctx->charsets[ctx->g_select] = CHARSET_DEFAULT; break;
1272 case '0':
1273 ctx->charsets[ctx->g_select] = CHARSET_DEC_SPECIAL; break;
1274 }
1275 ctx->g_select = 0;
1276 return;
1277 }
1278
1279 size_t x, y;
1280 ctx->get_cursor_pos(ctx, &x, &y);
1281
1282 switch (c) {
1283 case 0x00:
1284 case 0x7f:
1285 return;
1286 case 0x9b:
1287 ctx->csi = true;
1288 // FALLTHRU
1289 case 0x1b:
1290 ctx->escape_offset = 0;
1291 ctx->escape = true;
1292 return;
1293 case '\t':
1294 if ((x / ctx->tab_size + 1) >= ctx->cols) {
1295 ctx->set_cursor_pos(ctx, ctx->cols - 1, y);
1296 return;
1297 }
1298 ctx->set_cursor_pos(ctx, (x / ctx->tab_size + 1) * ctx->tab_size, y);
1299 return;
1300 case 0x0b:
1301 case 0x0c:
1302 case '\n':
1303 if (y == ctx->scroll_bottom_margin - 1) {
1304 ctx->scroll(ctx);
1305 ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y);
1306 } else {
1307 ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y + 1);
1308 }
1309 return;
1310 case '\b':
1311 ctx->set_cursor_pos(ctx, x - 1, y);
1312 return;
1313 case '\r':
1314 ctx->set_cursor_pos(ctx, 0, y);
1315 return;
1316 case '\a':
1317 // The bell is handled by the kernel
1318 if (ctx->callback != NULL) {
1319 ctx->callback(ctx, FLANTERM_CB_BELL, 0, 0, 0);
1320 }
1321 return;
1322 case 14:
1323 // Move to G1 set
1324 ctx->current_charset = 1;
1325 return;
1326 case 15:
1327 // Move to G0 set
1328 ctx->current_charset = 0;
1329 return;
1330 }
1331
1332 if (ctx->insert_mode == true) {
1333 for (size_t i = ctx->cols - 1; ; i--) {
1334 ctx->move_character(ctx, i + 1, y, i, y);
1335 if (i == x) {
1336 break;
1337 }
1338 }
1339 }
1340
1341 // Translate character set
1342 switch (ctx->charsets[ctx->current_charset]) {
1343 case CHARSET_DEFAULT:
1344 break;
1345 case CHARSET_DEC_SPECIAL:
1346 if (dec_special_print(ctx, c)) {
1347 return;
1348 }
1349 break;
1350 }
1351
1352 if (c >= 0x20 && c <= 0x7e) {
1353 ctx->raw_putchar(ctx, c);
1354 }
1355}