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Add \033[s and \033[u to save and restore cursor position.
[tmux-openbsd.git] / tty.c
blobdce4887b140a0d3e43dc072ddcb2f45f2dcab8e0
1 /* $OpenBSD$ */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include <sys/ioctl.h>
21
22 #include <netinet/in.h>
23
24 #include <errno.h>
25 #include <fcntl.h>
26 #include <resolv.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <termios.h>
30 #include <unistd.h>
31
32 #include "tmux.h"
33
34 void tty_read_callback(struct bufferevent *, void *);
35 void tty_error_callback(struct bufferevent *, short, void *);
36
37 int tty_try_256(struct tty *, u_char, const char *);
38 int tty_try_88(struct tty *, u_char, const char *);
39
40 void tty_colours(struct tty *, const struct grid_cell *);
41 void tty_check_fg(struct tty *, struct grid_cell *);
42 void tty_check_bg(struct tty *, struct grid_cell *);
43 void tty_colours_fg(struct tty *, const struct grid_cell *);
44 void tty_colours_bg(struct tty *, const struct grid_cell *);
45
46 void tty_redraw_region(struct tty *, const struct tty_ctx *);
47 void tty_emulate_repeat(
48 struct tty *, enum tty_code_code, enum tty_code_code, u_int);
49 void tty_cell(struct tty *,
50 const struct grid_cell *, const struct grid_utf8 *);
51
52 #define tty_use_acs(tty) \
53 (tty_term_has(tty->term, TTYC_ACSC) && !((tty)->flags & TTY_UTF8))
54
55 void
56 tty_init(struct tty *tty, int fd, char *term)
57 {
58 char *path;
59
60 memset(tty, 0, sizeof *tty);
61 tty->log_fd = -1;
62
63 if (term == NULL || *term == '\0')
64 tty->termname = xstrdup("unknown");
65 else
66 tty->termname = xstrdup(term);
67 tty->fd = fd;
68
69 if ((path = ttyname(fd)) == NULL)
70 fatalx("ttyname failed");
71 tty->path = xstrdup(path);
72 tty->cstyle = 0;
73 tty->ccolour = xstrdup("");
74
75 tty->flags = 0;
76 tty->term_flags = 0;
77 }
78
79 int
80 tty_resize(struct tty *tty)
81 {
82 struct winsize ws;
83 u_int sx, sy;
84
85 if (ioctl(tty->fd, TIOCGWINSZ, &ws) != -1) {
86 sx = ws.ws_col;
87 if (sx == 0)
88 sx = 80;
89 sy = ws.ws_row;
90 if (sy == 0)
91 sy = 24;
92 } else {
93 sx = 80;
94 sy = 24;
95 }
96 if (sx == tty->sx && sy == tty->sy)
97 return (0);
98 tty->sx = sx;
99 tty->sy = sy;
100
101 tty->cx = UINT_MAX;
102 tty->cy = UINT_MAX;
103
104 tty->rupper = UINT_MAX;
105 tty->rlower = UINT_MAX;
106
107 /*
108 * If the terminal has been started, reset the actual scroll region and
109 * cursor position, as this may not have happened.
110 */
111 if (tty->flags & TTY_STARTED) {
112 tty_cursor(tty, 0, 0);
113 tty_region(tty, 0, tty->sy - 1);
114 }
115
116 return (1);
117 }
118
119 int
120 tty_open(struct tty *tty, const char *overrides, char **cause)
121 {
122 char out[64];
123 int fd;
124
125 if (debug_level > 3) {
126 xsnprintf(out, sizeof out, "tmux-out-%ld.log", (long) getpid());
127 fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644);
128 if (fd != -1 && fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
129 fatal("fcntl failed");
130 tty->log_fd = fd;
131 }
132
133 tty->term = tty_term_find(tty->termname, tty->fd, overrides, cause);
134 if (tty->term == NULL) {
135 tty_close(tty);
136 return (-1);
137 }
138 tty->flags |= TTY_OPENED;
139
140 tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_ESCAPE);
141
142 tty->event = bufferevent_new(
143 tty->fd, tty_read_callback, NULL, tty_error_callback, tty);
144
145 tty_start_tty(tty);
146
147 tty_keys_init(tty);
148
149 return (0);
150 }
151
152 /* ARGSUSED */
153 void
154 tty_read_callback(unused struct bufferevent *bufev, void *data)
155 {
156 struct tty *tty = data;
157
158 while (tty_keys_next(tty))
159 ;
160 }
161
162 /* ARGSUSED */
163 void
164 tty_error_callback(
165 unused struct bufferevent *bufev, unused short what, unused void *data)
166 {
167 }
168
169 void
170 tty_start_tty(struct tty *tty)
171 {
172 struct termios tio;
173
174 if (tty->fd == -1 || tcgetattr(tty->fd, &tty->tio) != 0)
175 return;
176
177 setblocking(tty->fd, 0);
178
179 bufferevent_enable(tty->event, EV_READ|EV_WRITE);
180
181 memcpy(&tio, &tty->tio, sizeof tio);
182 tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP);
183 tio.c_iflag |= IGNBRK;
184 tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET);
185 tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL|
186 ECHOPRT|ECHOKE|ECHOCTL|ISIG);
187 tio.c_cc[VMIN] = 1;
188 tio.c_cc[VTIME] = 0;
189 if (tcsetattr(tty->fd, TCSANOW, &tio) == 0)
190 tcflush(tty->fd, TCIOFLUSH);
191
192 tty_putcode(tty, TTYC_SMCUP);
193
194 tty_putcode(tty, TTYC_SGR0);
195 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
196
197 tty_putcode(tty, TTYC_RMKX);
198 if (tty_use_acs(tty))
199 tty_putcode(tty, TTYC_ENACS);
200 tty_putcode(tty, TTYC_CLEAR);
201
202 tty_putcode(tty, TTYC_CNORM);
203 if (tty_term_has(tty->term, TTYC_KMOUS))
204 tty_puts(tty, "\033[?1000l");
205
206 tty->cx = UINT_MAX;
207 tty->cy = UINT_MAX;
208
209 tty->rlower = UINT_MAX;
210 tty->rupper = UINT_MAX;
211
212 tty->mode = MODE_CURSOR;
213
214 tty->flags |= TTY_STARTED;
215
216 tty_force_cursor_colour(tty, "");
217 }
218
219 void
220 tty_stop_tty(struct tty *tty)
221 {
222 struct winsize ws;
223
224 if (!(tty->flags & TTY_STARTED))
225 return;
226 tty->flags &= ~TTY_STARTED;
227
228 bufferevent_disable(tty->event, EV_READ|EV_WRITE);
229
230 /*
231 * Be flexible about error handling and try not kill the server just
232 * because the fd is invalid. Things like ssh -t can easily leave us
233 * with a dead tty.
234 */
235 if (ioctl(tty->fd, TIOCGWINSZ, &ws) == -1)
236 return;
237 if (tcsetattr(tty->fd, TCSANOW, &tty->tio) == -1)
238 return;
239
240 setblocking(tty->fd, 1);
241
242 tty_raw(tty, tty_term_string2(tty->term, TTYC_CSR, 0, ws.ws_row - 1));
243 if (tty_use_acs(tty))
244 tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
245 tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
246 tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
247 tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
248 if (tty_term_has(tty->term, TTYC_CS1) && tty->cstyle != 0) {
249 if (tty_term_has(tty->term, TTYC_CSR1))
250 tty_raw(tty, tty_term_string(tty->term, TTYC_CSR1));
251 else
252 tty_raw(tty, tty_term_string1(tty->term, TTYC_CS1, 0));
253 }
254 tty_raw(tty, tty_term_string(tty->term, TTYC_CR));
255
256 tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
257 if (tty_term_has(tty->term, TTYC_KMOUS))
258 tty_raw(tty, "\033[?1000l");
259
260 tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
261 }
262
263 void
264 tty_close(struct tty *tty)
265 {
266 if (tty->log_fd != -1) {
267 close(tty->log_fd);
268 tty->log_fd = -1;
269 }
270
271 evtimer_del(&tty->key_timer);
272 tty_stop_tty(tty);
273
274 if (tty->flags & TTY_OPENED) {
275 bufferevent_free(tty->event);
276
277 tty_term_free(tty->term);
278 tty_keys_free(tty);
279
280 tty->flags &= ~TTY_OPENED;
281 }
282
283 if (tty->fd != -1) {
284 close(tty->fd);
285 tty->fd = -1;
286 }
287 }
288
289 void
290 tty_free(struct tty *tty)
291 {
292 tty_close(tty);
293
294 xfree(tty->ccolour);
295 if (tty->path != NULL)
296 xfree(tty->path);
297 if (tty->termname != NULL)
298 xfree(tty->termname);
299 }
300
301 void
302 tty_raw(struct tty *tty, const char *s)
303 {
304 write(tty->fd, s, strlen(s));
305 }
306
307 void
308 tty_putcode(struct tty *tty, enum tty_code_code code)
309 {
310 tty_puts(tty, tty_term_string(tty->term, code));
311 }
312
313 void
314 tty_putcode1(struct tty *tty, enum tty_code_code code, int a)
315 {
316 if (a < 0)
317 return;
318 tty_puts(tty, tty_term_string1(tty->term, code, a));
319 }
320
321 void
322 tty_putcode2(struct tty *tty, enum tty_code_code code, int a, int b)
323 {
324 if (a < 0 || b < 0)
325 return;
326 tty_puts(tty, tty_term_string2(tty->term, code, a, b));
327 }
328
329 void
330 tty_putcode_ptr1(struct tty *tty, enum tty_code_code code, const void *a)
331 {
332 if (a != NULL)
333 tty_puts(tty, tty_term_ptr1(tty->term, code, a));
334 }
335
336 void
337 tty_putcode_ptr2(struct tty *tty, enum tty_code_code code, const void *a, const void *b)
338 {
339 if (a != NULL && b != NULL)
340 tty_puts(tty, tty_term_ptr2(tty->term, code, a, b));
341 }
342
343 void
344 tty_puts(struct tty *tty, const char *s)
345 {
346 if (*s == '\0')
347 return;
348 bufferevent_write(tty->event, s, strlen(s));
349
350 if (tty->log_fd != -1)
351 write(tty->log_fd, s, strlen(s));
352 }
353
354 void
355 tty_putc(struct tty *tty, u_char ch)
356 {
357 const char *acs;
358 u_int sx;
359
360 if (tty->cell.attr & GRID_ATTR_CHARSET) {
361 acs = tty_acs_get(tty, ch);
362 if (acs != NULL)
363 bufferevent_write(tty->event, acs, strlen(acs));
364 else
365 bufferevent_write(tty->event, &ch, 1);
366 } else
367 bufferevent_write(tty->event, &ch, 1);
368
369 if (ch >= 0x20 && ch != 0x7f) {
370 sx = tty->sx;
371 if (tty->term->flags & TERM_EARLYWRAP)
372 sx--;
373
374 if (tty->cx >= sx) {
375 tty->cx = 1;
376 if (tty->cy != tty->rlower)
377 tty->cy++;
378 } else
379 tty->cx++;
380 }
381
382 if (tty->log_fd != -1)
383 write(tty->log_fd, &ch, 1);
384 }
385
386 void
387 tty_pututf8(struct tty *tty, const struct grid_utf8 *gu)
388 {
389 size_t size;
390
391 size = grid_utf8_size(gu);
392 bufferevent_write(tty->event, gu->data, size);
393 if (tty->log_fd != -1)
394 write(tty->log_fd, gu->data, size);
395 tty->cx += gu->width;
396 }
397
398 void
399 tty_set_title(struct tty *tty, const char *title)
400 {
401 if (!tty_term_has(tty->term, TTYC_TSL) ||
402 !tty_term_has(tty->term, TTYC_FSL))
403 return;
404
405 tty_putcode(tty, TTYC_TSL);
406 tty_puts(tty, title);
407 tty_putcode(tty, TTYC_FSL);
408 }
409
410 void
411 tty_force_cursor_colour(struct tty *tty, const char *ccolour)
412 {
413 if (*ccolour == '\0')
414 tty_putcode(tty, TTYC_CR);
415 else
416 tty_putcode_ptr1(tty, TTYC_CC, ccolour);
417 xfree(tty->ccolour);
418 tty->ccolour = xstrdup(ccolour);
419 }
420
421 void
422 tty_update_mode(struct tty *tty, int mode, struct screen *s)
423 {
424 int changed;
425
426 if (strcmp(s->ccolour, tty->ccolour))
427 tty_force_cursor_colour(tty, s->ccolour);
428
429 if (tty->flags & TTY_NOCURSOR)
430 mode &= ~MODE_CURSOR;
431
432 changed = mode ^ tty->mode;
433 if (changed & MODE_CURSOR) {
434 if (mode & MODE_CURSOR)
435 tty_putcode(tty, TTYC_CNORM);
436 else
437 tty_putcode(tty, TTYC_CIVIS);
438 }
439 if (tty->cstyle != s->cstyle) {
440 if (tty_term_has(tty->term, TTYC_CS1)) {
441 if (s->cstyle == 0 &&
442 tty_term_has(tty->term, TTYC_CSR1))
443 tty_putcode(tty, TTYC_CSR1);
444 else
445 tty_putcode1(tty, TTYC_CS1, s->cstyle);
446 }
447 tty->cstyle = s->cstyle;
448 }
449 if (changed & ALL_MOUSE_MODES) {
450 if (mode & ALL_MOUSE_MODES) {
451 if (mode & MODE_MOUSE_UTF8)
452 tty_puts(tty, "\033[?1005h");
453 if (mode & MODE_MOUSE_ANY)
454 tty_puts(tty, "\033[?1003h");
455 else if (mode & MODE_MOUSE_BUTTON)
456 tty_puts(tty, "\033[?1002h");
457 else if (mode & MODE_MOUSE_STANDARD)
458 tty_puts(tty, "\033[?1000h");
459 } else {
460 if (tty->mode & MODE_MOUSE_ANY)
461 tty_puts(tty, "\033[?1003l");
462 else if (tty->mode & MODE_MOUSE_BUTTON)
463 tty_puts(tty, "\033[?1002l");
464 else if (tty->mode & MODE_MOUSE_STANDARD)
465 tty_puts(tty, "\033[?1000l");
466 if (tty->mode & MODE_MOUSE_UTF8)
467 tty_puts(tty, "\033[?1005l");
468 }
469 }
470 if (changed & MODE_KKEYPAD) {
471 if (mode & MODE_KKEYPAD)
472 tty_putcode(tty, TTYC_SMKX);
473 else
474 tty_putcode(tty, TTYC_RMKX);
475 }
476 tty->mode = mode;
477 }
478
479 void
480 tty_emulate_repeat(
481 struct tty *tty, enum tty_code_code code, enum tty_code_code code1, u_int n)
482 {
483 if (tty_term_has(tty->term, code))
484 tty_putcode1(tty, code, n);
485 else {
486 while (n-- > 0)
487 tty_putcode(tty, code1);
488 }
489 }
490
491 /*
492 * Redraw scroll region using data from screen (already updated). Used when
493 * CSR not supported, or window is a pane that doesn't take up the full
494 * width of the terminal.
495 */
496 void
497 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
498 {
499 struct window_pane *wp = ctx->wp;
500 struct screen *s = wp->screen;
501 u_int i;
502
503 /*
504 * If region is >= 50% of the screen, just schedule a window redraw. In
505 * most cases, this is likely to be followed by some more scrolling -
506 * without this, the entire pane ends up being redrawn many times which
507 * can be much more data.
508 */
509 if (ctx->orlower - ctx->orupper >= screen_size_y(s) / 2) {
510 wp->flags |= PANE_REDRAW;
511 return;
512 }
513
514 if (ctx->ocy < ctx->orupper || ctx->ocy > ctx->orlower) {
515 for (i = ctx->ocy; i < screen_size_y(s); i++)
516 tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
517 } else {
518 for (i = ctx->orupper; i <= ctx->orlower; i++)
519 tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
520 }
521 }
522
523 void
524 tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy)
525 {
526 const struct grid_cell *gc;
527 struct grid_line *gl;
528 struct grid_cell tmpgc;
529 const struct grid_utf8 *gu;
530 u_int i, sx;
531
532 tty_update_mode(tty, tty->mode & ~MODE_CURSOR, s);
533
534 sx = screen_size_x(s);
535 if (sx > s->grid->linedata[s->grid->hsize + py].cellsize)
536 sx = s->grid->linedata[s->grid->hsize + py].cellsize;
537 if (sx > tty->sx)
538 sx = tty->sx;
539
540 /*
541 * Don't move the cursor to the start permission if it will wrap there
542 * itself.
543 */
544 gl = NULL;
545 if (py != 0)
546 gl = &s->grid->linedata[s->grid->hsize + py - 1];
547 if (oy + py == 0 || gl == NULL || !(gl->flags & GRID_LINE_WRAPPED) ||
548 tty->cx < tty->sx || ox != 0 ||
549 (oy + py != tty->cy + 1 && tty->cy != s->rlower + oy))
550 tty_cursor(tty, ox, oy + py);
551
552 for (i = 0; i < sx; i++) {
553 gc = grid_view_peek_cell(s->grid, i, py);
554
555 gu = NULL;
556 if (gc->flags & GRID_FLAG_UTF8)
557 gu = grid_view_peek_utf8(s->grid, i, py);
558
559 if (screen_check_selection(s, i, py)) {
560 memcpy(&tmpgc, &s->sel.cell, sizeof tmpgc);
561 tmpgc.data = gc->data;
562 tmpgc.flags = gc->flags &
563 ~(GRID_FLAG_FG256|GRID_FLAG_BG256);
564 tmpgc.flags |= s->sel.cell.flags &
565 (GRID_FLAG_FG256|GRID_FLAG_BG256);
566 tty_cell(tty, &tmpgc, gu);
567 } else
568 tty_cell(tty, gc, gu);
569 }
570
571 if (sx >= tty->sx) {
572 tty_update_mode(tty, tty->mode, s);
573 return;
574 }
575 tty_reset(tty);
576
577 tty_cursor(tty, ox + sx, oy + py);
578 if (screen_size_x(s) >= tty->sx && tty_term_has(tty->term, TTYC_EL))
579 tty_putcode(tty, TTYC_EL);
580 else {
581 for (i = sx; i < screen_size_x(s); i++)
582 tty_putc(tty, ' ');
583 }
584 tty_update_mode(tty, tty->mode, s);
585 }
586
587 void
588 tty_write(void (*cmdfn)(
589 struct tty *, const struct tty_ctx *), const struct tty_ctx *ctx)
590 {
591 struct window_pane *wp = ctx->wp;
592 struct client *c;
593 u_int i;
594
595 /* wp can be NULL if updating the screen but not the terminal. */
596 if (wp == NULL)
597 return;
598
599 if (wp->window->flags & WINDOW_REDRAW || wp->flags & PANE_REDRAW)
600 return;
601 if (!window_pane_visible(wp))
602 return;
603
604 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
605 c = ARRAY_ITEM(&clients, i);
606 if (c == NULL || c->session == NULL)
607 continue;
608 if (c->flags & CLIENT_SUSPENDED)
609 continue;
610
611 if (c->session->curw->window == wp->window) {
612 if (c->tty.term == NULL)
613 continue;
614 if (c->tty.flags & (TTY_FREEZE|TTY_BACKOFF))
615 continue;
616 cmdfn(&c->tty, ctx);
617 }
618 }
619 }
620
621 void
622 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
623 {
624 struct window_pane *wp = ctx->wp;
625 struct screen *s = wp->screen;
626 u_int i;
627
628 if (wp->xoff != 0 || screen_size_x(s) < tty->sx) {
629 tty_draw_line(tty, wp->screen, ctx->ocy, wp->xoff, wp->yoff);
630 return;
631 }
632
633 tty_reset(tty);
634
635 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
636
637 if (tty_term_has(tty->term, TTYC_ICH) ||
638 tty_term_has(tty->term, TTYC_ICH1))
639 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
640 else if (tty_term_has(tty->term, TTYC_SMIR) &&
641 tty_term_has(tty->term, TTYC_RMIR)) {
642 tty_putcode(tty, TTYC_SMIR);
643 for (i = 0; i < ctx->num; i++)
644 tty_putc(tty, ' ');
645 tty_putcode(tty, TTYC_RMIR);
646 } else
647 tty_draw_line(tty, wp->screen, ctx->ocy, wp->xoff, wp->yoff);
648 }
649
650 void
651 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
652 {
653 struct window_pane *wp = ctx->wp;
654 struct screen *s = wp->screen;
655
656 if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
657 (!tty_term_has(tty->term, TTYC_DCH) &&
658 !tty_term_has(tty->term, TTYC_DCH1))) {
659 tty_draw_line(tty, wp->screen, ctx->ocy, wp->xoff, wp->yoff);
660 return;
661 }
662
663 tty_reset(tty);
664
665 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
666
667 if (tty_term_has(tty->term, TTYC_DCH) ||
668 tty_term_has(tty->term, TTYC_DCH1))
669 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
670 }
671
672 void
673 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
674 {
675 struct window_pane *wp = ctx->wp;
676 struct screen *s = wp->screen;
677
678 if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
679 !tty_term_has(tty->term, TTYC_CSR) ||
680 !tty_term_has(tty->term, TTYC_IL1)) {
681 tty_redraw_region(tty, ctx);
682 return;
683 }
684
685 tty_reset(tty);
686
687 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
688 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
689
690 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
691 }
692
693 void
694 tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
695 {
696 struct window_pane *wp = ctx->wp;
697 struct screen *s = wp->screen;
698
699 if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
700 !tty_term_has(tty->term, TTYC_CSR) ||
701 !tty_term_has(tty->term, TTYC_DL1)) {
702 tty_redraw_region(tty, ctx);
703 return;
704 }
705
706 tty_reset(tty);
707
708 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
709 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
710
711 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
712 }
713
714 void
715 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
716 {
717 struct window_pane *wp = ctx->wp;
718 struct screen *s = wp->screen;
719 u_int i;
720
721 tty_reset(tty);
722
723 tty_cursor_pane(tty, ctx, 0, ctx->ocy);
724
725 if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
726 tty_term_has(tty->term, TTYC_EL)) {
727 tty_putcode(tty, TTYC_EL);
728 } else {
729 for (i = 0; i < screen_size_x(s); i++)
730 tty_putc(tty, ' ');
731 }
732 }
733
734 void
735 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
736 {
737 struct window_pane *wp = ctx->wp;
738 struct screen *s = wp->screen;
739 u_int i;
740
741 tty_reset(tty);
742
743 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
744
745 if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
746 tty_term_has(tty->term, TTYC_EL))
747 tty_putcode(tty, TTYC_EL);
748 else {
749 for (i = ctx->ocx; i < screen_size_x(s); i++)
750 tty_putc(tty, ' ');
751 }
752 }
753
754 void
755 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
756 {
757 struct window_pane *wp = ctx->wp;
758 u_int i;
759
760 tty_reset(tty);
761
762 if (wp->xoff == 0 && tty_term_has(tty->term, TTYC_EL1)) {
763 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
764 tty_putcode(tty, TTYC_EL1);
765 } else {
766 tty_cursor_pane(tty, ctx, 0, ctx->ocy);
767 for (i = 0; i < ctx->ocx + 1; i++)
768 tty_putc(tty, ' ');
769 }
770 }
771
772 void
773 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
774 {
775 struct window_pane *wp = ctx->wp;
776 struct screen *s = wp->screen;
777
778 if (ctx->ocy != ctx->orupper)
779 return;
780
781 if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
782 !tty_term_has(tty->term, TTYC_CSR) ||
783 !tty_term_has(tty->term, TTYC_RI)) {
784 tty_redraw_region(tty, ctx);
785 return;
786 }
787
788 tty_reset(tty);
789
790 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
791 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
792
793 tty_putcode(tty, TTYC_RI);
794 }
795
796 void
797 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
798 {
799 struct window_pane *wp = ctx->wp;
800 struct screen *s = wp->screen;
801
802 if (ctx->ocy != ctx->orlower)
803 return;
804
805 if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
806 !tty_term_has(tty->term, TTYC_CSR)) {
807 tty_redraw_region(tty, ctx);
808 return;
809 }
810
811 /*
812 * If this line wrapped naturally (ctx->num is nonzero), don't do
813 * anything - the cursor can just be moved to the last cell and wrap
814 * naturally.
815 */
816 if (ctx->num && !(tty->term->flags & TERM_EARLYWRAP))
817 return;
818
819 tty_reset(tty);
820
821 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
822 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
823
824 tty_putc(tty, '\n');
825 }
826
827 void
828 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
829 {
830 struct window_pane *wp = ctx->wp;
831 struct screen *s = wp->screen;
832 u_int i, j;
833
834 tty_reset(tty);
835
836 tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
837 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
838
839 if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
840 tty_term_has(tty->term, TTYC_EL)) {
841 tty_putcode(tty, TTYC_EL);
842 if (ctx->ocy != screen_size_y(s) - 1) {
843 tty_cursor_pane(tty, ctx, 0, ctx->ocy + 1);
844 for (i = ctx->ocy + 1; i < screen_size_y(s); i++) {
845 tty_putcode(tty, TTYC_EL);
846 if (i == screen_size_y(s) - 1)
847 continue;
848 tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
849 tty->cy++;
850 }
851 }
852 } else {
853 for (i = ctx->ocx; i < screen_size_x(s); i++)
854 tty_putc(tty, ' ');
855 for (j = ctx->ocy + 1; j < screen_size_y(s); j++) {
856 tty_cursor_pane(tty, ctx, 0, j);
857 for (i = 0; i < screen_size_x(s); i++)
858 tty_putc(tty, ' ');
859 }
860 }
861 }
862
863 void
864 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
865 {
866 struct window_pane *wp = ctx->wp;
867 struct screen *s = wp->screen;
868 u_int i, j;
869
870 tty_reset(tty);
871
872 tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
873 tty_cursor_pane(tty, ctx, 0, 0);
874
875 if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
876 tty_term_has(tty->term, TTYC_EL)) {
877 for (i = 0; i < ctx->ocy; i++) {
878 tty_putcode(tty, TTYC_EL);
879 tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
880 tty->cy++;
881 }
882 } else {
883 for (j = 0; j < ctx->ocy; j++) {
884 tty_cursor_pane(tty, ctx, 0, j);
885 for (i = 0; i < screen_size_x(s); i++)
886 tty_putc(tty, ' ');
887 }
888 }
889 for (i = 0; i <= ctx->ocx; i++)
890 tty_putc(tty, ' ');
891 }
892
893 void
894 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
895 {
896 struct window_pane *wp = ctx->wp;
897 struct screen *s = wp->screen;
898 u_int i, j;
899
900 tty_reset(tty);
901
902 tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
903 tty_cursor_pane(tty, ctx, 0, 0);
904
905 if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
906 tty_term_has(tty->term, TTYC_EL)) {
907 for (i = 0; i < screen_size_y(s); i++) {
908 tty_putcode(tty, TTYC_EL);
909 if (i != screen_size_y(s) - 1) {
910 tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
911 tty->cy++;
912 }
913 }
914 } else {
915 for (j = 0; j < screen_size_y(s); j++) {
916 tty_cursor_pane(tty, ctx, 0, j);
917 for (i = 0; i < screen_size_x(s); i++)
918 tty_putc(tty, ' ');
919 }
920 }
921 }
922
923 void
924 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
925 {
926 struct window_pane *wp = ctx->wp;
927 struct screen *s = wp->screen;
928 u_int i, j;
929
930 tty_reset(tty);
931
932 tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
933
934 for (j = 0; j < screen_size_y(s); j++) {
935 tty_cursor_pane(tty, ctx, 0, j);
936 for (i = 0; i < screen_size_x(s); i++)
937 tty_putc(tty, 'E');
938 }
939 }
940
941 void
942 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
943 {
944 struct window_pane *wp = ctx->wp;
945 struct screen *s = wp->screen;
946 u_int cx;
947 u_int width;
948 const struct grid_cell *gc = ctx->cell;
949 const struct grid_utf8 *gu = ctx->utf8;
950
951 if (gc->flags & GRID_FLAG_UTF8)
952 width = gu->width;
953 else
954 width = 1;
955
956 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
957
958 /* Is the cursor in the very last position? */
959 if (ctx->ocx > wp->sx - width) {
960 if (wp->xoff != 0 || wp->sx != tty->sx) {
961 /*
962 * The pane doesn't fill the entire line, the linefeed
963 * will already have happened, so just move the cursor.
964 */
965 tty_cursor_pane(tty, ctx, 0, ctx->ocy + 1);
966 } else if (tty->cx < tty->sx) {
967 /*
968 * The cursor isn't in the last position already, so
969 * move as far left as possible and redraw the last
970 * cell to move into the last position.
971 */
972 cx = screen_size_x(s) - width;
973 tty_cursor_pane(tty, ctx, cx, ctx->ocy);
974 tty_cell(tty, &ctx->last_cell, &ctx->last_utf8);
975 }
976 } else
977 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
978
979 tty_cell(tty, ctx->cell, ctx->utf8);
980 }
981
982 void
983 tty_cmd_utf8character(struct tty *tty, const struct tty_ctx *ctx)
984 {
985 struct window_pane *wp = ctx->wp;
986
987 /*
988 * Cannot rely on not being a partial character, so just redraw the
989 * whole line.
990 */
991 tty_draw_line(tty, wp->screen, ctx->ocy, wp->xoff, wp->yoff);
992 }
993
994 void
995 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
996 {
997 char *buf;
998 size_t off;
999
1000 if (!tty_term_has(tty->term, TTYC_MS))
1001 return;
1002
1003 off = 4 * ((ctx->num + 2) / 3) + 1; /* storage for base64 */
1004 buf = xmalloc(off);
1005
1006 b64_ntop(ctx->ptr, ctx->num, buf, off);
1007 tty_putcode_ptr2(tty, TTYC_MS, "", buf);
1008
1009 xfree(buf);
1010 }
1011
1012 void
1013 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
1014 {
1015 u_int i;
1016 u_char *str = ctx->ptr;
1017
1018 for (i = 0; i < ctx->num; i++)
1019 tty_putc(tty, str[i]);
1020 }
1021
1022 void
1023 tty_cell(
1024 struct tty *tty, const struct grid_cell *gc, const struct grid_utf8 *gu)
1025 {
1026 u_int i;
1027
1028 /* Skip last character if terminal is stupid. */
1029 if (tty->term->flags & TERM_EARLYWRAP &&
1030 tty->cy == tty->sy - 1 && tty->cx == tty->sx - 1)
1031 return;
1032
1033 /* If this is a padding character, do nothing. */
1034 if (gc->flags & GRID_FLAG_PADDING)
1035 return;
1036
1037 /* Set the attributes. */
1038 tty_attributes(tty, gc);
1039
1040 /* If not UTF-8, write directly. */
1041 if (!(gc->flags & GRID_FLAG_UTF8)) {
1042 if (gc->data < 0x20 || gc->data == 0x7f)
1043 return;
1044 tty_putc(tty, gc->data);
1045 return;
1046 }
1047
1048 /* If the terminal doesn't support UTF-8, write underscores. */
1049 if (!(tty->flags & TTY_UTF8)) {
1050 for (i = 0; i < gu->width; i++)
1051 tty_putc(tty, '_');
1052 return;
1053 }
1054
1055 /* Otherwise, write UTF-8. */
1056 tty_pututf8(tty, gu);
1057 }
1058
1059 void
1060 tty_reset(struct tty *tty)
1061 {
1062 struct grid_cell *gc = &tty->cell;
1063
1064 if (memcmp(gc, &grid_default_cell, sizeof *gc) == 0)
1065 return;
1066
1067 if ((gc->attr & GRID_ATTR_CHARSET) && tty_use_acs(tty))
1068 tty_putcode(tty, TTYC_RMACS);
1069 tty_putcode(tty, TTYC_SGR0);
1070 memcpy(gc, &grid_default_cell, sizeof *gc);
1071 }
1072
1073 /* Set region inside pane. */
1074 void
1075 tty_region_pane(
1076 struct tty *tty, const struct tty_ctx *ctx, u_int rupper, u_int rlower)
1077 {
1078 struct window_pane *wp = ctx->wp;
1079
1080 tty_region(tty, wp->yoff + rupper, wp->yoff + rlower);
1081 }
1082
1083 /* Set region at absolute position. */
1084 void
1085 tty_region(struct tty *tty, u_int rupper, u_int rlower)
1086 {
1087 if (tty->rlower == rlower && tty->rupper == rupper)
1088 return;
1089 if (!tty_term_has(tty->term, TTYC_CSR))
1090 return;
1091
1092 tty->rupper = rupper;
1093 tty->rlower = rlower;
1094
1095 /*
1096 * Some terminals (such as PuTTY) do not correctly reset the cursor to
1097 * 0,0 if it is beyond the last column (they do not reset their wrap
1098 * flag so further output causes a line feed). As a workaround, do an
1099 * explicit move to 0 first.
1100 */
1101 if (tty->cx >= tty->sx)
1102 tty_cursor(tty, 0, tty->cy);
1103
1104 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
1105 tty_cursor(tty, 0, 0);
1106 }
1107
1108 /* Move cursor inside pane. */
1109 void
1110 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
1111 {
1112 struct window_pane *wp = ctx->wp;
1113
1114 tty_cursor(tty, wp->xoff + cx, wp->yoff + cy);
1115 }
1116
1117 /* Move cursor to absolute position. */
1118 void
1119 tty_cursor(struct tty *tty, u_int cx, u_int cy)
1120 {
1121 struct tty_term *term = tty->term;
1122 u_int thisx, thisy;
1123 int change;
1124
1125 if (cx > tty->sx - 1)
1126 cx = tty->sx - 1;
1127
1128 thisx = tty->cx;
1129 thisy = tty->cy;
1130
1131 /* No change. */
1132 if (cx == thisx && cy == thisy)
1133 return;
1134
1135 /* Very end of the line, just use absolute movement. */
1136 if (thisx > tty->sx - 1)
1137 goto absolute;
1138
1139 /* Move to home position (0, 0). */
1140 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
1141 tty_putcode(tty, TTYC_HOME);
1142 goto out;
1143 }
1144
1145 /* Zero on the next line. */
1146 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower) {
1147 tty_putc(tty, '\r');
1148 tty_putc(tty, '\n');
1149 goto out;
1150 }
1151
1152 /* Moving column or row. */
1153 if (cy == thisy) {
1154 /*
1155 * Moving column only, row staying the same.
1156 */
1157
1158 /* To left edge. */
1159 if (cx == 0) {
1160 tty_putc(tty, '\r');
1161 goto out;
1162 }
1163
1164 /* One to the left. */
1165 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
1166 tty_putcode(tty, TTYC_CUB1);
1167 goto out;
1168 }
1169
1170 /* One to the right. */
1171 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
1172 tty_putcode(tty, TTYC_CUF1);
1173 goto out;
1174 }
1175
1176 /* Calculate difference. */
1177 change = thisx - cx; /* +ve left, -ve right */
1178
1179 /*
1180 * Use HPA if change is larger than absolute, otherwise move
1181 * the cursor with CUB/CUF.
1182 */
1183 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
1184 tty_putcode1(tty, TTYC_HPA, cx);
1185 goto out;
1186 } else if (change > 0 && tty_term_has(term, TTYC_CUB)) {
1187 tty_putcode1(tty, TTYC_CUB, change);
1188 goto out;
1189 } else if (change < 0 && tty_term_has(term, TTYC_CUF)) {
1190 tty_putcode1(tty, TTYC_CUF, -change);
1191 goto out;
1192 }
1193 } else if (cx == thisx) {
1194 /*
1195 * Moving row only, column staying the same.
1196 */
1197
1198 /* One above. */
1199 if (thisy != tty->rupper &&
1200 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
1201 tty_putcode(tty, TTYC_CUU1);
1202 goto out;
1203 }
1204
1205 /* One below. */
1206 if (thisy != tty->rlower &&
1207 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
1208 tty_putcode(tty, TTYC_CUD1);
1209 goto out;
1210 }
1211
1212 /* Calculate difference. */
1213 change = thisy - cy; /* +ve up, -ve down */
1214
1215 /*
1216 * Try to use VPA if change is larger than absolute or if this
1217 * change would cross the scroll region, otherwise use CUU/CUD.
1218 */
1219 if ((u_int) abs(change) > cy ||
1220 (change < 0 && cy - change > tty->rlower) ||
1221 (change > 0 && cy - change < tty->rupper)) {
1222 if (tty_term_has(term, TTYC_VPA)) {
1223 tty_putcode1(tty, TTYC_VPA, cy);
1224 goto out;
1225 }
1226 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
1227 tty_putcode1(tty, TTYC_CUU, change);
1228 goto out;
1229 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
1230 tty_putcode1(tty, TTYC_CUD, -change);
1231 goto out;
1232 }
1233 }
1234
1235 absolute:
1236 /* Absolute movement. */
1237 tty_putcode2(tty, TTYC_CUP, cy, cx);
1238
1239 out:
1240 tty->cx = cx;
1241 tty->cy = cy;
1242 }
1243
1244 void
1245 tty_attributes(struct tty *tty, const struct grid_cell *gc)
1246 {
1247 struct grid_cell *tc = &tty->cell, gc2;
1248 u_char changed;
1249
1250 memcpy(&gc2, gc, sizeof gc2);
1251
1252 /*
1253 * If no setab, try to use the reverse attribute as a best-effort for a
1254 * non-default background. This is a bit of a hack but it doesn't do
1255 * any serious harm and makes a couple of applications happier.
1256 */
1257 if (!tty_term_has(tty->term, TTYC_SETAB)) {
1258 if (gc2.attr & GRID_ATTR_REVERSE) {
1259 if (gc2.fg != 7 && gc2.fg != 8)
1260 gc2.attr &= ~GRID_ATTR_REVERSE;
1261 } else {
1262 if (gc2.bg != 0 && gc2.bg != 8)
1263 gc2.attr |= GRID_ATTR_REVERSE;
1264 }
1265 }
1266
1267 /* Fix up the colours if necessary. */
1268 tty_check_fg(tty, &gc2);
1269 tty_check_bg(tty, &gc2);
1270
1271 /* If any bits are being cleared, reset everything. */
1272 if (tc->attr & ~gc2.attr)
1273 tty_reset(tty);
1274
1275 /*
1276 * Set the colours. This may call tty_reset() (so it comes next) and
1277 * may add to (NOT remove) the desired attributes by changing new_attr.
1278 */
1279 tty_colours(tty, &gc2);
1280
1281 /* Filter out attribute bits already set. */
1282 changed = gc2.attr & ~tc->attr;
1283 tc->attr = gc2.attr;
1284
1285 /* Set the attributes. */
1286 if (changed & GRID_ATTR_BRIGHT)
1287 tty_putcode(tty, TTYC_BOLD);
1288 if (changed & GRID_ATTR_DIM)
1289 tty_putcode(tty, TTYC_DIM);
1290 if (changed & GRID_ATTR_ITALICS)
1291 {
1292 if (tty_term_has(tty->term, TTYC_SITM))
1293 tty_putcode(tty, TTYC_SITM);
1294 else
1295 tty_putcode(tty, TTYC_SMSO);
1296 }
1297 if (changed & GRID_ATTR_UNDERSCORE)
1298 tty_putcode(tty, TTYC_SMUL);
1299 if (changed & GRID_ATTR_BLINK)
1300 tty_putcode(tty, TTYC_BLINK);
1301 if (changed & GRID_ATTR_REVERSE) {
1302 if (tty_term_has(tty->term, TTYC_REV))
1303 tty_putcode(tty, TTYC_REV);
1304 else if (tty_term_has(tty->term, TTYC_SMSO))
1305 tty_putcode(tty, TTYC_SMSO);
1306 }
1307 if (changed & GRID_ATTR_HIDDEN)
1308 tty_putcode(tty, TTYC_INVIS);
1309 if ((changed & GRID_ATTR_CHARSET) && tty_use_acs(tty))
1310 tty_putcode(tty, TTYC_SMACS);
1311 }
1312
1313 void
1314 tty_colours(struct tty *tty, const struct grid_cell *gc)
1315 {
1316 struct grid_cell *tc = &tty->cell;
1317 u_char fg = gc->fg, bg = gc->bg, flags = gc->flags;
1318 int have_ax, fg_default, bg_default;
1319
1320 /* No changes? Nothing is necessary. */
1321 if (fg == tc->fg && bg == tc->bg &&
1322 ((flags ^ tc->flags) & (GRID_FLAG_FG256|GRID_FLAG_BG256)) == 0)
1323 return;
1324
1325 /*
1326 * Is either the default colour? This is handled specially because the
1327 * best solution might be to reset both colours to default, in which
1328 * case if only one is default need to fall onward to set the other
1329 * colour.
1330 */
1331 fg_default = (fg == 8 && !(flags & GRID_FLAG_FG256));
1332 bg_default = (bg == 8 && !(flags & GRID_FLAG_BG256));
1333 if (fg_default || bg_default) {
1334 /*
1335 * If don't have AX but do have op, send sgr0 (op can't
1336 * actually be used because it is sometimes the same as sgr0
1337 * and sometimes isn't). This resets both colours to default.
1338 *
1339 * Otherwise, try to set the default colour only as needed.
1340 */
1341 have_ax = tty_term_has(tty->term, TTYC_AX);
1342 if (!have_ax && tty_term_has(tty->term, TTYC_OP))
1343 tty_reset(tty);
1344 else {
1345 if (fg_default &&
1346 (tc->fg != 8 || tc->flags & GRID_FLAG_FG256)) {
1347 if (have_ax)
1348 tty_puts(tty, "\033[39m");
1349 else if (tc->fg != 7 ||
1350 tc->flags & GRID_FLAG_FG256)
1351 tty_putcode1(tty, TTYC_SETAF, 7);
1352 tc->fg = 8;
1353 tc->flags &= ~GRID_FLAG_FG256;
1354 }
1355 if (bg_default &&
1356 (tc->bg != 8 || tc->flags & GRID_FLAG_BG256)) {
1357 if (have_ax)
1358 tty_puts(tty, "\033[49m");
1359 else if (tc->bg != 0 ||
1360 tc->flags & GRID_FLAG_BG256)
1361 tty_putcode1(tty, TTYC_SETAB, 0);
1362 tc->bg = 8;
1363 tc->flags &= ~GRID_FLAG_BG256;
1364 }
1365 }
1366 }
1367
1368 /* Set the foreground colour. */
1369 if (!fg_default && (fg != tc->fg ||
1370 ((flags & GRID_FLAG_FG256) != (tc->flags & GRID_FLAG_FG256))))
1371 tty_colours_fg(tty, gc);
1372
1373 /*
1374 * Set the background colour. This must come after the foreground as
1375 * tty_colour_fg() can call tty_reset().
1376 */
1377 if (!bg_default && (bg != tc->bg ||
1378 ((flags & GRID_FLAG_BG256) != (tc->flags & GRID_FLAG_BG256))))
1379 tty_colours_bg(tty, gc);
1380 }
1381
1382 void
1383 tty_check_fg(struct tty *tty, struct grid_cell *gc)
1384 {
1385 u_int colours;
1386
1387 /* Is this a 256-colour colour? */
1388 if (gc->flags & GRID_FLAG_FG256) {
1389 /* And not a 256 colour mode? */
1390 if (!(tty->term->flags & TERM_88COLOURS) &&
1391 !(tty->term_flags & TERM_88COLOURS) &&
1392 !(tty->term->flags & TERM_256COLOURS) &&
1393 !(tty->term_flags & TERM_256COLOURS)) {
1394 gc->fg = colour_256to16(gc->fg);
1395 if (gc->fg & 8) {
1396 gc->fg &= 7;
1397 gc->attr |= GRID_ATTR_BRIGHT;
1398 } else
1399 gc->attr &= ~GRID_ATTR_BRIGHT;
1400 gc->flags &= ~GRID_FLAG_FG256;
1401 }
1402 return;
1403 }
1404
1405 /* Is this an aixterm colour? */
1406 colours = tty_term_number(tty->term, TTYC_COLORS);
1407 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
1408 gc->fg -= 90;
1409 gc->attr |= GRID_ATTR_BRIGHT;
1410 }
1411 }
1412
1413 void
1414 tty_check_bg(struct tty *tty, struct grid_cell *gc)
1415 {
1416 u_int colours;
1417
1418 /* Is this a 256-colour colour? */
1419 if (gc->flags & GRID_FLAG_BG256) {
1420 /*
1421 * And not a 256 colour mode? Translate to 16-colour
1422 * palette. Bold background doesn't exist portably, so just
1423 * discard the bold bit if set.
1424 */
1425 if (!(tty->term->flags & TERM_88COLOURS) &&
1426 !(tty->term_flags & TERM_88COLOURS) &&
1427 !(tty->term->flags & TERM_256COLOURS) &&
1428 !(tty->term_flags & TERM_256COLOURS)) {
1429 gc->bg = colour_256to16(gc->bg);
1430 if (gc->bg & 8)
1431 gc->bg &= 7;
1432 gc->attr &= ~GRID_ATTR_BRIGHT;
1433 gc->flags &= ~GRID_FLAG_BG256;
1434 }
1435 return;
1436 }
1437
1438 /* Is this an aixterm colour? */
1439 colours = tty_term_number(tty->term, TTYC_COLORS);
1440 if (gc->bg >= 100 && gc->bg <= 107 && colours < 16) {
1441 gc->bg -= 90;
1442 gc->attr |= GRID_ATTR_BRIGHT;
1443 }
1444 }
1445
1446 void
1447 tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
1448 {
1449 struct grid_cell *tc = &tty->cell;
1450 u_char fg = gc->fg;
1451 char s[32];
1452
1453 /* Is this a 256-colour colour? */
1454 if (gc->flags & GRID_FLAG_FG256) {
1455 /* Try as 256 colours or translating to 88. */
1456 if (tty_try_256(tty, fg, "38") == 0)
1457 goto save_fg;
1458 if (tty_try_88(tty, fg, "38") == 0)
1459 goto save_fg;
1460 /* Else already handled by tty_check_fg. */
1461 return;
1462 }
1463
1464 /* Is this an aixterm bright colour? */
1465 if (fg >= 90 && fg <= 97) {
1466 xsnprintf(s, sizeof s, "\033[%dm", fg);
1467 tty_puts(tty, s);
1468 goto save_fg;
1469 }
1470
1471 /* Otherwise set the foreground colour. */
1472 tty_putcode1(tty, TTYC_SETAF, fg);
1473
1474 save_fg:
1475 /* Save the new values in the terminal current cell. */
1476 tc->fg = fg;
1477 tc->flags &= ~GRID_FLAG_FG256;
1478 tc->flags |= gc->flags & GRID_FLAG_FG256;
1479 }
1480
1481 void
1482 tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
1483 {
1484 struct grid_cell *tc = &tty->cell;
1485 u_char bg = gc->bg;
1486 char s[32];
1487
1488 /* Is this a 256-colour colour? */
1489 if (gc->flags & GRID_FLAG_BG256) {
1490 /* Try as 256 colours or translating to 88. */
1491 if (tty_try_256(tty, bg, "48") == 0)
1492 goto save_bg;
1493 if (tty_try_88(tty, bg, "48") == 0)
1494 goto save_bg;
1495 /* Else already handled by tty_check_bg. */
1496 return;
1497 }
1498
1499 /* Is this an aixterm bright colour? */
1500 if (bg >= 100 && bg <= 107) {
1501 /* 16 colour terminals or above only. */
1502 if (tty_term_number(tty->term, TTYC_COLORS) >= 16) {
1503 xsnprintf(s, sizeof s, "\033[%dm", bg);
1504 tty_puts(tty, s);
1505 goto save_bg;
1506 }
1507 bg -= 100;
1508 /* no such thing as a bold background */
1509 }
1510
1511 /* Otherwise set the background colour. */
1512 tty_putcode1(tty, TTYC_SETAB, bg);
1513
1514 save_bg:
1515 /* Save the new values in the terminal current cell. */
1516 tc->bg = bg;
1517 tc->flags &= ~GRID_FLAG_BG256;
1518 tc->flags |= gc->flags & GRID_FLAG_BG256;
1519 }
1520
1521 int
1522 tty_try_256(struct tty *tty, u_char colour, const char *type)
1523 {
1524 char s[32];
1525
1526 if (!(tty->term->flags & TERM_256COLOURS) &&
1527 !(tty->term_flags & TERM_256COLOURS))
1528 return (-1);
1529
1530 xsnprintf(s, sizeof s, "\033[%s;5;%hhum", type, colour);
1531 tty_puts(tty, s);
1532 return (0);
1533 }
1534
1535 int
1536 tty_try_88(struct tty *tty, u_char colour, const char *type)
1537 {
1538 char s[32];
1539
1540 if (!(tty->term->flags & TERM_88COLOURS) &&
1541 !(tty->term_flags & TERM_88COLOURS))
1542 return (-1);
1543 colour = colour_256to88(colour);
1544
1545 xsnprintf(s, sizeof s, "\033[%s;5;%hhum", type, colour);
1546 tty_puts(tty, s);
1547 return (0);
1548 }
1549
1550 void
1551 tty_bell(struct tty *tty)
1552 {
1553 tty_putcode(tty, TTYC_BEL);
1554 }