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Merge branch 'obsd-master'
[tmux.git] / tty.c
blobad4a110a3b4624bed800cffd63165cee7b4825d5
1 /* $OpenBSD$ */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 <curses.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <resolv.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <termios.h>
31 #include <unistd.h>
32
33 #include "tmux.h"
34
35 static int tty_log_fd = -1;
36
37 static void tty_set_italics(struct tty *);
38 static int tty_try_colour(struct tty *, int, const char *);
39 static void tty_force_cursor_colour(struct tty *, int);
40 static void tty_cursor_pane(struct tty *, const struct tty_ctx *, u_int,
41 u_int);
42 static void tty_cursor_pane_unless_wrap(struct tty *,
43 const struct tty_ctx *, u_int, u_int);
44 static void tty_invalidate(struct tty *);
45 static void tty_colours(struct tty *, const struct grid_cell *);
46 static void tty_check_fg(struct tty *, struct colour_palette *,
47 struct grid_cell *);
48 static void tty_check_bg(struct tty *, struct colour_palette *,
49 struct grid_cell *);
50 static void tty_check_us(struct tty *, struct colour_palette *,
51 struct grid_cell *);
52 static void tty_colours_fg(struct tty *, const struct grid_cell *);
53 static void tty_colours_bg(struct tty *, const struct grid_cell *);
54 static void tty_colours_us(struct tty *, const struct grid_cell *);
55
56 static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int,
57 u_int);
58 static void tty_region(struct tty *, u_int, u_int);
59 static void tty_margin_pane(struct tty *, const struct tty_ctx *);
60 static void tty_margin(struct tty *, u_int, u_int);
61 static int tty_large_region(struct tty *, const struct tty_ctx *);
62 static int tty_fake_bce(const struct tty *, const struct grid_cell *,
63 u_int);
64 static void tty_redraw_region(struct tty *, const struct tty_ctx *);
65 static void tty_emulate_repeat(struct tty *, enum tty_code_code,
66 enum tty_code_code, u_int);
67 static void tty_repeat_space(struct tty *, u_int);
68 static void tty_draw_pane(struct tty *, const struct tty_ctx *, u_int);
69 static void tty_default_attributes(struct tty *, const struct grid_cell *,
70 struct colour_palette *, u_int, struct hyperlinks *);
71 static int tty_check_overlay(struct tty *, u_int, u_int);
72 static void tty_check_overlay_range(struct tty *, u_int, u_int, u_int,
73 struct overlay_ranges *);
74
75 #define tty_use_margin(tty) \
76 (tty->term->flags & TERM_DECSLRM)
77 #define tty_full_width(tty, ctx) \
78 ((ctx)->xoff == 0 && (ctx)->sx >= (tty)->sx)
79
80 #define TTY_BLOCK_INTERVAL (100000 /* 100 milliseconds */)
81 #define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8)
82 #define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8)
83
84 #define TTY_QUERY_TIMEOUT 5
85
86 void
87 tty_create_log(void)
88 {
89 char name[64];
90
91 xsnprintf(name, sizeof name, "tmux-out-%ld.log", (long)getpid());
92
93 tty_log_fd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
94 if (tty_log_fd != -1 && fcntl(tty_log_fd, F_SETFD, FD_CLOEXEC) == -1)
95 fatal("fcntl failed");
96 }
97
98 int
99 tty_init(struct tty *tty, struct client *c)
100 {
101 if (!isatty(c->fd))
102 return (-1);
103
104 memset(tty, 0, sizeof *tty);
105 tty->client = c;
106
107 tty->cstyle = SCREEN_CURSOR_DEFAULT;
108 tty->ccolour = -1;
109 tty->fg = tty->bg = -1;
110
111 if (tcgetattr(c->fd, &tty->tio) != 0)
112 return (-1);
113 return (0);
114 }
115
116 void
117 tty_resize(struct tty *tty)
118 {
119 struct client *c = tty->client;
120 struct winsize ws;
121 u_int sx, sy, xpixel, ypixel;
122
123 if (ioctl(c->fd, TIOCGWINSZ, &ws) != -1) {
124 sx = ws.ws_col;
125 if (sx == 0) {
126 sx = 80;
127 xpixel = 0;
128 } else
129 xpixel = ws.ws_xpixel / sx;
130 sy = ws.ws_row;
131 if (sy == 0) {
132 sy = 24;
133 ypixel = 0;
134 } else
135 ypixel = ws.ws_ypixel / sy;
136 } else {
137 sx = 80;
138 sy = 24;
139 xpixel = 0;
140 ypixel = 0;
141 }
142 log_debug("%s: %s now %ux%u (%ux%u)", __func__, c->name, sx, sy,
143 xpixel, ypixel);
144 tty_set_size(tty, sx, sy, xpixel, ypixel);
145 tty_invalidate(tty);
146 }
147
148 void
149 tty_set_size(struct tty *tty, u_int sx, u_int sy, u_int xpixel, u_int ypixel)
150 {
151 tty->sx = sx;
152 tty->sy = sy;
153 tty->xpixel = xpixel;
154 tty->ypixel = ypixel;
155 }
156
157 static void
158 tty_read_callback(__unused int fd, __unused short events, void *data)
159 {
160 struct tty *tty = data;
161 struct client *c = tty->client;
162 const char *name = c->name;
163 size_t size = EVBUFFER_LENGTH(tty->in);
164 int nread;
165
166 nread = evbuffer_read(tty->in, c->fd, -1);
167 if (nread == 0 || nread == -1) {
168 if (nread == 0)
169 log_debug("%s: read closed", name);
170 else
171 log_debug("%s: read error: %s", name, strerror(errno));
172 event_del(&tty->event_in);
173 server_client_lost(tty->client);
174 return;
175 }
176 log_debug("%s: read %d bytes (already %zu)", name, nread, size);
177
178 while (tty_keys_next(tty))
179 ;
180 }
181
182 static void
183 tty_timer_callback(__unused int fd, __unused short events, void *data)
184 {
185 struct tty *tty = data;
186 struct client *c = tty->client;
187 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
188
189 log_debug("%s: %zu discarded", c->name, tty->discarded);
190
191 c->flags |= CLIENT_ALLREDRAWFLAGS;
192 c->discarded += tty->discarded;
193
194 if (tty->discarded < TTY_BLOCK_STOP(tty)) {
195 tty->flags &= ~TTY_BLOCK;
196 tty_invalidate(tty);
197 return;
198 }
199 tty->discarded = 0;
200 evtimer_add(&tty->timer, &tv);
201 }
202
203 static int
204 tty_block_maybe(struct tty *tty)
205 {
206 struct client *c = tty->client;
207 size_t size = EVBUFFER_LENGTH(tty->out);
208 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
209
210 if (size == 0)
211 tty->flags &= ~TTY_NOBLOCK;
212 else if (tty->flags & TTY_NOBLOCK)
213 return (0);
214
215 if (size < TTY_BLOCK_START(tty))
216 return (0);
217
218 if (tty->flags & TTY_BLOCK)
219 return (1);
220 tty->flags |= TTY_BLOCK;
221
222 log_debug("%s: can't keep up, %zu discarded", c->name, size);
223
224 evbuffer_drain(tty->out, size);
225 c->discarded += size;
226
227 tty->discarded = 0;
228 evtimer_add(&tty->timer, &tv);
229 return (1);
230 }
231
232 static void
233 tty_write_callback(__unused int fd, __unused short events, void *data)
234 {
235 struct tty *tty = data;
236 struct client *c = tty->client;
237 size_t size = EVBUFFER_LENGTH(tty->out);
238 int nwrite;
239
240 nwrite = evbuffer_write(tty->out, c->fd);
241 if (nwrite == -1)
242 return;
243 log_debug("%s: wrote %d bytes (of %zu)", c->name, nwrite, size);
244
245 if (c->redraw > 0) {
246 if ((size_t)nwrite >= c->redraw)
247 c->redraw = 0;
248 else
249 c->redraw -= nwrite;
250 log_debug("%s: waiting for redraw, %zu bytes left", c->name,
251 c->redraw);
252 } else if (tty_block_maybe(tty))
253 return;
254
255 if (EVBUFFER_LENGTH(tty->out) != 0)
256 event_add(&tty->event_out, NULL);
257 }
258
259 int
260 tty_open(struct tty *tty, char **cause)
261 {
262 struct client *c = tty->client;
263
264 tty->term = tty_term_create(tty, c->term_name, c->term_caps,
265 c->term_ncaps, &c->term_features, cause);
266 if (tty->term == NULL) {
267 tty_close(tty);
268 return (-1);
269 }
270 tty->flags |= TTY_OPENED;
271
272 tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_BLOCK|TTY_TIMER);
273
274 event_set(&tty->event_in, c->fd, EV_PERSIST|EV_READ,
275 tty_read_callback, tty);
276 tty->in = evbuffer_new();
277 if (tty->in == NULL)
278 fatal("out of memory");
279
280 event_set(&tty->event_out, c->fd, EV_WRITE, tty_write_callback, tty);
281 tty->out = evbuffer_new();
282 if (tty->out == NULL)
283 fatal("out of memory");
284
285 evtimer_set(&tty->timer, tty_timer_callback, tty);
286
287 tty_start_tty(tty);
288 tty_keys_build(tty);
289
290 return (0);
291 }
292
293 static void
294 tty_start_timer_callback(__unused int fd, __unused short events, void *data)
295 {
296 struct tty *tty = data;
297 struct client *c = tty->client;
298
299 log_debug("%s: start timer fired", c->name);
300 if ((tty->flags & (TTY_HAVEDA|TTY_HAVEDA2|TTY_HAVEXDA)) == 0)
301 tty_update_features(tty);
302 tty->flags |= TTY_ALL_REQUEST_FLAGS;
303 }
304
305 void
306 tty_start_tty(struct tty *tty)
307 {
308 struct client *c = tty->client;
309 struct termios tio;
310 struct timeval tv = { .tv_sec = TTY_QUERY_TIMEOUT };
311
312 setblocking(c->fd, 0);
313 event_add(&tty->event_in, NULL);
314
315 memcpy(&tio, &tty->tio, sizeof tio);
316 tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP);
317 tio.c_iflag |= IGNBRK;
318 tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET);
319 tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL|ECHOPRT|
320 ECHOKE|ISIG);
321 tio.c_cc[VMIN] = 1;
322 tio.c_cc[VTIME] = 0;
323 if (tcsetattr(c->fd, TCSANOW, &tio) == 0)
324 tcflush(c->fd, TCOFLUSH);
325
326 tty_putcode(tty, TTYC_SMCUP);
327
328 tty_putcode(tty, TTYC_SMKX);
329 tty_putcode(tty, TTYC_CLEAR);
330
331 if (tty_acs_needed(tty)) {
332 log_debug("%s: using capabilities for ACS", c->name);
333 tty_putcode(tty, TTYC_ENACS);
334 } else
335 log_debug("%s: using UTF-8 for ACS", c->name);
336
337 tty_putcode(tty, TTYC_CNORM);
338 if (tty_term_has(tty->term, TTYC_KMOUS)) {
339 tty_puts(tty, "\033[?1000l\033[?1002l\033[?1003l");
340 tty_puts(tty, "\033[?1006l\033[?1005l");
341 }
342 if (tty_term_has(tty->term, TTYC_ENBP))
343 tty_putcode(tty, TTYC_ENBP);
344
345 evtimer_set(&tty->start_timer, tty_start_timer_callback, tty);
346 evtimer_add(&tty->start_timer, &tv);
347
348 tty->flags |= TTY_STARTED;
349 tty_invalidate(tty);
350
351 if (tty->ccolour != -1)
352 tty_force_cursor_colour(tty, -1);
353
354 tty->mouse_drag_flag = 0;
355 tty->mouse_drag_update = NULL;
356 tty->mouse_drag_release = NULL;
357 }
358
359 void
360 tty_send_requests(struct tty *tty)
361 {
362 if (~tty->flags & TTY_STARTED)
363 return;
364
365 if (tty->term->flags & TERM_VT100LIKE) {
366 if (~tty->term->flags & TTY_HAVEDA)
367 tty_puts(tty, "\033[c");
368 if (~tty->flags & TTY_HAVEDA2)
369 tty_puts(tty, "\033[>c");
370 if (~tty->flags & TTY_HAVEXDA)
371 tty_puts(tty, "\033[>q");
372 if (~tty->flags & TTY_HAVEFG)
373 tty_puts(tty, "\033]10;?\033\\");
374 if (~tty->flags & TTY_HAVEBG)
375 tty_puts(tty, "\033]11;?\033\\");
376 } else
377 tty->flags |= TTY_ALL_REQUEST_FLAGS;
378 }
379
380 void
381 tty_stop_tty(struct tty *tty)
382 {
383 struct client *c = tty->client;
384 struct winsize ws;
385
386 if (!(tty->flags & TTY_STARTED))
387 return;
388 tty->flags &= ~TTY_STARTED;
389
390 evtimer_del(&tty->start_timer);
391
392 event_del(&tty->timer);
393 tty->flags &= ~TTY_BLOCK;
394
395 event_del(&tty->event_in);
396 event_del(&tty->event_out);
397
398 /*
399 * Be flexible about error handling and try not kill the server just
400 * because the fd is invalid. Things like ssh -t can easily leave us
401 * with a dead tty.
402 */
403 if (ioctl(c->fd, TIOCGWINSZ, &ws) == -1)
404 return;
405 if (tcsetattr(c->fd, TCSANOW, &tty->tio) == -1)
406 return;
407
408 tty_raw(tty, tty_term_string_ii(tty->term, TTYC_CSR, 0, ws.ws_row - 1));
409 if (tty_acs_needed(tty))
410 tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
411 tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
412 tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
413 tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
414 if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
415 if (tty_term_has(tty->term, TTYC_SE))
416 tty_raw(tty, tty_term_string(tty->term, TTYC_SE));
417 else if (tty_term_has(tty->term, TTYC_SS))
418 tty_raw(tty, tty_term_string_i(tty->term, TTYC_SS, 0));
419 }
420 if (tty->ccolour != -1)
421 tty_raw(tty, tty_term_string(tty->term, TTYC_CR));
422
423 tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
424 if (tty_term_has(tty->term, TTYC_KMOUS)) {
425 tty_raw(tty, "\033[?1000l\033[?1002l\033[?1003l");
426 tty_raw(tty, "\033[?1006l\033[?1005l");
427 }
428 if (tty_term_has(tty->term, TTYC_DSBP))
429 tty_raw(tty, tty_term_string(tty->term, TTYC_DSBP));
430
431 if (tty->term->flags & TERM_VT100LIKE)
432 tty_raw(tty, "\033[?7727l");
433 tty_raw(tty, tty_term_string(tty->term, TTYC_DSFCS));
434 tty_raw(tty, tty_term_string(tty->term, TTYC_DSEKS));
435
436 if (tty_use_margin(tty))
437 tty_raw(tty, tty_term_string(tty->term, TTYC_DSMG));
438 tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
439
440 setblocking(c->fd, 1);
441 }
442
443 void
444 tty_close(struct tty *tty)
445 {
446 if (event_initialized(&tty->key_timer))
447 evtimer_del(&tty->key_timer);
448 tty_stop_tty(tty);
449
450 if (tty->flags & TTY_OPENED) {
451 evbuffer_free(tty->in);
452 event_del(&tty->event_in);
453 evbuffer_free(tty->out);
454 event_del(&tty->event_out);
455
456 tty_term_free(tty->term);
457 tty_keys_free(tty);
458
459 tty->flags &= ~TTY_OPENED;
460 }
461 }
462
463 void
464 tty_free(struct tty *tty)
465 {
466 tty_close(tty);
467 }
468
469 void
470 tty_update_features(struct tty *tty)
471 {
472 struct client *c = tty->client;
473
474 if (tty_apply_features(tty->term, c->term_features))
475 tty_term_apply_overrides(tty->term);
476
477 if (tty_use_margin(tty))
478 tty_putcode(tty, TTYC_ENMG);
479 if (options_get_number(global_options, "extended-keys"))
480 tty_puts(tty, tty_term_string(tty->term, TTYC_ENEKS));
481 if (options_get_number(global_options, "focus-events"))
482 tty_puts(tty, tty_term_string(tty->term, TTYC_ENFCS));
483 if (tty->term->flags & TERM_VT100LIKE)
484 tty_puts(tty, "\033[?7727h");
485
486 /*
487 * Features might have changed since the first draw during attach. For
488 * example, this happens when DA responses are received.
489 */
490 server_redraw_client(c);
491
492 tty_invalidate(tty);
493 }
494
495 void
496 tty_raw(struct tty *tty, const char *s)
497 {
498 struct client *c = tty->client;
499 ssize_t n, slen;
500 u_int i;
501
502 slen = strlen(s);
503 for (i = 0; i < 5; i++) {
504 n = write(c->fd, s, slen);
505 if (n >= 0) {
506 s += n;
507 slen -= n;
508 if (slen == 0)
509 break;
510 } else if (n == -1 && errno != EAGAIN)
511 break;
512 usleep(100);
513 }
514 }
515
516 void
517 tty_putcode(struct tty *tty, enum tty_code_code code)
518 {
519 tty_puts(tty, tty_term_string(tty->term, code));
520 }
521
522 void
523 tty_putcode_i(struct tty *tty, enum tty_code_code code, int a)
524 {
525 if (a < 0)
526 return;
527 tty_puts(tty, tty_term_string_i(tty->term, code, a));
528 }
529
530 void
531 tty_putcode_ii(struct tty *tty, enum tty_code_code code, int a, int b)
532 {
533 if (a < 0 || b < 0)
534 return;
535 tty_puts(tty, tty_term_string_ii(tty->term, code, a, b));
536 }
537
538 void
539 tty_putcode_iii(struct tty *tty, enum tty_code_code code, int a, int b, int c)
540 {
541 if (a < 0 || b < 0 || c < 0)
542 return;
543 tty_puts(tty, tty_term_string_iii(tty->term, code, a, b, c));
544 }
545
546 void
547 tty_putcode_s(struct tty *tty, enum tty_code_code code, const char *a)
548 {
549 if (a != NULL)
550 tty_puts(tty, tty_term_string_s(tty->term, code, a));
551 }
552
553 void
554 tty_putcode_ss(struct tty *tty, enum tty_code_code code, const char *a,
555 const char *b)
556 {
557 if (a != NULL && b != NULL)
558 tty_puts(tty, tty_term_string_ss(tty->term, code, a, b));
559 }
560
561 static void
562 tty_add(struct tty *tty, const char *buf, size_t len)
563 {
564 struct client *c = tty->client;
565
566 if (tty->flags & TTY_BLOCK) {
567 tty->discarded += len;
568 return;
569 }
570
571 evbuffer_add(tty->out, buf, len);
572 log_debug("%s: %.*s", c->name, (int)len, buf);
573 c->written += len;
574
575 if (tty_log_fd != -1)
576 write(tty_log_fd, buf, len);
577 if (tty->flags & TTY_STARTED)
578 event_add(&tty->event_out, NULL);
579 }
580
581 void
582 tty_puts(struct tty *tty, const char *s)
583 {
584 if (*s != '\0')
585 tty_add(tty, s, strlen(s));
586 }
587
588 void
589 tty_putc(struct tty *tty, u_char ch)
590 {
591 const char *acs;
592
593 if ((tty->term->flags & TERM_NOAM) &&
594 ch >= 0x20 && ch != 0x7f &&
595 tty->cy == tty->sy - 1 &&
596 tty->cx + 1 >= tty->sx)
597 return;
598
599 if (tty->cell.attr & GRID_ATTR_CHARSET) {
600 acs = tty_acs_get(tty, ch);
601 if (acs != NULL)
602 tty_add(tty, acs, strlen(acs));
603 else
604 tty_add(tty, &ch, 1);
605 } else
606 tty_add(tty, &ch, 1);
607
608 if (ch >= 0x20 && ch != 0x7f) {
609 if (tty->cx >= tty->sx) {
610 tty->cx = 1;
611 if (tty->cy != tty->rlower)
612 tty->cy++;
613
614 /*
615 * On !am terminals, force the cursor position to where
616 * we think it should be after a line wrap - this means
617 * it works on sensible terminals as well.
618 */
619 if (tty->term->flags & TERM_NOAM)
620 tty_putcode_ii(tty, TTYC_CUP, tty->cy, tty->cx);
621 } else
622 tty->cx++;
623 }
624 }
625
626 void
627 tty_putn(struct tty *tty, const void *buf, size_t len, u_int width)
628 {
629 if ((tty->term->flags & TERM_NOAM) &&
630 tty->cy == tty->sy - 1 &&
631 tty->cx + len >= tty->sx)
632 len = tty->sx - tty->cx - 1;
633
634 tty_add(tty, buf, len);
635 if (tty->cx + width > tty->sx) {
636 tty->cx = (tty->cx + width) - tty->sx;
637 if (tty->cx <= tty->sx)
638 tty->cy++;
639 else
640 tty->cx = tty->cy = UINT_MAX;
641 } else
642 tty->cx += width;
643 }
644
645 static void
646 tty_set_italics(struct tty *tty)
647 {
648 const char *s;
649
650 if (tty_term_has(tty->term, TTYC_SITM)) {
651 s = options_get_string(global_options, "default-terminal");
652 if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) {
653 tty_putcode(tty, TTYC_SITM);
654 return;
655 }
656 }
657 tty_putcode(tty, TTYC_SMSO);
658 }
659
660 void
661 tty_set_title(struct tty *tty, const char *title)
662 {
663 if (!tty_term_has(tty->term, TTYC_TSL) ||
664 !tty_term_has(tty->term, TTYC_FSL))
665 return;
666
667 tty_putcode(tty, TTYC_TSL);
668 tty_puts(tty, title);
669 tty_putcode(tty, TTYC_FSL);
670 }
671
672 void
673 tty_set_path(struct tty *tty, const char *title)
674 {
675 if (!tty_term_has(tty->term, TTYC_SWD) ||
676 !tty_term_has(tty->term, TTYC_FSL))
677 return;
678
679 tty_putcode(tty, TTYC_SWD);
680 tty_puts(tty, title);
681 tty_putcode(tty, TTYC_FSL);
682 }
683
684 static void
685 tty_force_cursor_colour(struct tty *tty, int c)
686 {
687 u_char r, g, b;
688 char s[13];
689
690 if (c != -1)
691 c = colour_force_rgb(c);
692 if (c == tty->ccolour)
693 return;
694 if (c == -1)
695 tty_putcode(tty, TTYC_CR);
696 else {
697 colour_split_rgb(c, &r, &g, &b);
698 xsnprintf(s, sizeof s, "rgb:%02hhx/%02hhx/%02hhx", r, g, b);
699 tty_putcode_s(tty, TTYC_CS, s);
700 }
701 tty->ccolour = c;
702 }
703
704 static int
705 tty_update_cursor(struct tty *tty, int mode, struct screen *s)
706 {
707 enum screen_cursor_style cstyle;
708 int ccolour, changed, cmode = mode;
709
710 /* Set cursor colour if changed. */
711 if (s != NULL) {
712 ccolour = s->ccolour;
713 if (s->ccolour == -1)
714 ccolour = s->default_ccolour;
715 tty_force_cursor_colour(tty, ccolour);
716 }
717
718 /* If cursor is off, set as invisible. */
719 if (~cmode & MODE_CURSOR) {
720 if (tty->mode & MODE_CURSOR)
721 tty_putcode(tty, TTYC_CIVIS);
722 return (cmode);
723 }
724
725 /* Check if blinking or very visible flag changed or style changed. */
726 if (s == NULL)
727 cstyle = tty->cstyle;
728 else {
729 cstyle = s->cstyle;
730 if (cstyle == SCREEN_CURSOR_DEFAULT) {
731 if (~cmode & MODE_CURSOR_BLINKING_SET) {
732 if (s->default_mode & MODE_CURSOR_BLINKING)
733 cmode |= MODE_CURSOR_BLINKING;
734 else
735 cmode &= ~MODE_CURSOR_BLINKING;
736 }
737 cstyle = s->default_cstyle;
738 }
739 }
740
741 /* If nothing changed, do nothing. */
742 changed = cmode ^ tty->mode;
743 if ((changed & CURSOR_MODES) == 0 && cstyle == tty->cstyle)
744 return (cmode);
745
746 /*
747 * Set cursor style. If an explicit style has been set with DECSCUSR,
748 * set it if supported, otherwise send cvvis for blinking styles.
749 *
750 * If no style, has been set (SCREEN_CURSOR_DEFAULT), then send cvvis
751 * if either the blinking or very visible flags are set.
752 */
753 tty_putcode(tty, TTYC_CNORM);
754 switch (cstyle) {
755 case SCREEN_CURSOR_DEFAULT:
756 if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
757 if (tty_term_has(tty->term, TTYC_SE))
758 tty_putcode(tty, TTYC_SE);
759 else
760 tty_putcode_i(tty, TTYC_SS, 0);
761 }
762 if (cmode & (MODE_CURSOR_BLINKING|MODE_CURSOR_VERY_VISIBLE))
763 tty_putcode(tty, TTYC_CVVIS);
764 break;
765 case SCREEN_CURSOR_BLOCK:
766 if (tty_term_has(tty->term, TTYC_SS)) {
767 if (cmode & MODE_CURSOR_BLINKING)
768 tty_putcode_i(tty, TTYC_SS, 1);
769 else
770 tty_putcode_i(tty, TTYC_SS, 2);
771 } else if (cmode & MODE_CURSOR_BLINKING)
772 tty_putcode(tty, TTYC_CVVIS);
773 break;
774 case SCREEN_CURSOR_UNDERLINE:
775 if (tty_term_has(tty->term, TTYC_SS)) {
776 if (cmode & MODE_CURSOR_BLINKING)
777 tty_putcode_i(tty, TTYC_SS, 3);
778 else
779 tty_putcode_i(tty, TTYC_SS, 4);
780 } else if (cmode & MODE_CURSOR_BLINKING)
781 tty_putcode(tty, TTYC_CVVIS);
782 break;
783 case SCREEN_CURSOR_BAR:
784 if (tty_term_has(tty->term, TTYC_SS)) {
785 if (cmode & MODE_CURSOR_BLINKING)
786 tty_putcode_i(tty, TTYC_SS, 5);
787 else
788 tty_putcode_i(tty, TTYC_SS, 6);
789 } else if (cmode & MODE_CURSOR_BLINKING)
790 tty_putcode(tty, TTYC_CVVIS);
791 break;
792 }
793 tty->cstyle = cstyle;
794 return (cmode);
795 }
796
797 void
798 tty_update_mode(struct tty *tty, int mode, struct screen *s)
799 {
800 struct tty_term *term = tty->term;
801 struct client *c = tty->client;
802 int changed;
803
804 if (tty->flags & TTY_NOCURSOR)
805 mode &= ~MODE_CURSOR;
806
807 if (tty_update_cursor(tty, mode, s) & MODE_CURSOR_BLINKING)
808 mode |= MODE_CURSOR_BLINKING;
809 else
810 mode &= ~MODE_CURSOR_BLINKING;
811
812 changed = mode ^ tty->mode;
813 if (log_get_level() != 0 && changed != 0) {
814 log_debug("%s: current mode %s", c->name,
815 screen_mode_to_string(tty->mode));
816 log_debug("%s: setting mode %s", c->name,
817 screen_mode_to_string(mode));
818 }
819
820 if ((changed & ALL_MOUSE_MODES) && tty_term_has(term, TTYC_KMOUS)) {
821 /*
822 * If the mouse modes have changed, clear then all and apply
823 * again. There are differences in how terminals track the
824 * various bits.
825 */
826 tty_puts(tty, "\033[?1006l\033[?1000l\033[?1002l\033[?1003l");
827 if (mode & ALL_MOUSE_MODES)
828 tty_puts(tty, "\033[?1006h");
829 if (mode & MODE_MOUSE_ALL)
830 tty_puts(tty, "\033[?1000h\033[?1002h\033[?1003h");
831 else if (mode & MODE_MOUSE_BUTTON)
832 tty_puts(tty, "\033[?1000h\033[?1002h");
833 else if (mode & MODE_MOUSE_STANDARD)
834 tty_puts(tty, "\033[?1000h");
835 }
836 tty->mode = mode;
837 }
838
839 static void
840 tty_emulate_repeat(struct tty *tty, enum tty_code_code code,
841 enum tty_code_code code1, u_int n)
842 {
843 if (tty_term_has(tty->term, code))
844 tty_putcode_i(tty, code, n);
845 else {
846 while (n-- > 0)
847 tty_putcode(tty, code1);
848 }
849 }
850
851 static void
852 tty_repeat_space(struct tty *tty, u_int n)
853 {
854 static char s[500];
855
856 if (*s != ' ')
857 memset(s, ' ', sizeof s);
858
859 while (n > sizeof s) {
860 tty_putn(tty, s, sizeof s, sizeof s);
861 n -= sizeof s;
862 }
863 if (n != 0)
864 tty_putn(tty, s, n, n);
865 }
866
867 /* Is this window bigger than the terminal? */
868 int
869 tty_window_bigger(struct tty *tty)
870 {
871 struct client *c = tty->client;
872 struct window *w = c->session->curw->window;
873
874 return (tty->sx < w->sx || tty->sy - status_line_size(c) < w->sy);
875 }
876
877 /* What offset should this window be drawn at? */
878 int
879 tty_window_offset(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
880 {
881 *ox = tty->oox;
882 *oy = tty->ooy;
883 *sx = tty->osx;
884 *sy = tty->osy;
885
886 return (tty->oflag);
887 }
888
889 /* What offset should this window be drawn at? */
890 static int
891 tty_window_offset1(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
892 {
893 struct client *c = tty->client;
894 struct window *w = c->session->curw->window;
895 struct window_pane *wp = server_client_get_pane(c);
896 u_int cx, cy, lines;
897
898 lines = status_line_size(c);
899
900 if (tty->sx >= w->sx && tty->sy - lines >= w->sy) {
901 *ox = 0;
902 *oy = 0;
903 *sx = w->sx;
904 *sy = w->sy;
905
906 c->pan_window = NULL;
907 return (0);
908 }
909
910 *sx = tty->sx;
911 *sy = tty->sy - lines;
912
913 if (c->pan_window == w) {
914 if (*sx >= w->sx)
915 c->pan_ox = 0;
916 else if (c->pan_ox + *sx > w->sx)
917 c->pan_ox = w->sx - *sx;
918 *ox = c->pan_ox;
919 if (*sy >= w->sy)
920 c->pan_oy = 0;
921 else if (c->pan_oy + *sy > w->sy)
922 c->pan_oy = w->sy - *sy;
923 *oy = c->pan_oy;
924 return (1);
925 }
926
927 if (~wp->screen->mode & MODE_CURSOR) {
928 *ox = 0;
929 *oy = 0;
930 } else {
931 cx = wp->xoff + wp->screen->cx;
932 cy = wp->yoff + wp->screen->cy;
933
934 if (cx < *sx)
935 *ox = 0;
936 else if (cx > w->sx - *sx)
937 *ox = w->sx - *sx;
938 else
939 *ox = cx - *sx / 2;
940
941 if (cy < *sy)
942 *oy = 0;
943 else if (cy > w->sy - *sy)
944 *oy = w->sy - *sy;
945 else
946 *oy = cy - *sy / 2;
947 }
948
949 c->pan_window = NULL;
950 return (1);
951 }
952
953 /* Update stored offsets for a window and redraw if necessary. */
954 void
955 tty_update_window_offset(struct window *w)
956 {
957 struct client *c;
958
959 TAILQ_FOREACH(c, &clients, entry) {
960 if (c->session != NULL &&
961 c->session->curw != NULL &&
962 c->session->curw->window == w)
963 tty_update_client_offset(c);
964 }
965 }
966
967 /* Update stored offsets for a client and redraw if necessary. */
968 void
969 tty_update_client_offset(struct client *c)
970 {
971 u_int ox, oy, sx, sy;
972
973 if (~c->flags & CLIENT_TERMINAL)
974 return;
975
976 c->tty.oflag = tty_window_offset1(&c->tty, &ox, &oy, &sx, &sy);
977 if (ox == c->tty.oox &&
978 oy == c->tty.ooy &&
979 sx == c->tty.osx &&
980 sy == c->tty.osy)
981 return;
982
983 log_debug ("%s: %s offset has changed (%u,%u %ux%u -> %u,%u %ux%u)",
984 __func__, c->name, c->tty.oox, c->tty.ooy, c->tty.osx, c->tty.osy,
985 ox, oy, sx, sy);
986
987 c->tty.oox = ox;
988 c->tty.ooy = oy;
989 c->tty.osx = sx;
990 c->tty.osy = sy;
991
992 c->flags |= (CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS);
993 }
994
995 /*
996 * Is the region large enough to be worth redrawing once later rather than
997 * probably several times now? Currently yes if it is more than 50% of the
998 * pane.
999 */
1000 static int
1001 tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx)
1002 {
1003 return (ctx->orlower - ctx->orupper >= ctx->sy / 2);
1004 }
1005
1006 /*
1007 * Return if BCE is needed but the terminal doesn't have it - it'll need to be
1008 * emulated.
1009 */
1010 static int
1011 tty_fake_bce(const struct tty *tty, const struct grid_cell *gc, u_int bg)
1012 {
1013 if (tty_term_flag(tty->term, TTYC_BCE))
1014 return (0);
1015 if (!COLOUR_DEFAULT(bg) || !COLOUR_DEFAULT(gc->bg))
1016 return (1);
1017 return (0);
1018 }
1019
1020 /*
1021 * Redraw scroll region using data from screen (already updated). Used when
1022 * CSR not supported, or window is a pane that doesn't take up the full
1023 * width of the terminal.
1024 */
1025 static void
1026 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
1027 {
1028 struct client *c = tty->client;
1029 u_int i;
1030
1031 /*
1032 * If region is large, schedule a redraw. In most cases this is likely
1033 * to be followed by some more scrolling.
1034 */
1035 if (tty_large_region(tty, ctx)) {
1036 log_debug("%s: %s large redraw", __func__, c->name);
1037 ctx->redraw_cb(ctx);
1038 return;
1039 }
1040
1041 for (i = ctx->orupper; i <= ctx->orlower; i++)
1042 tty_draw_pane(tty, ctx, i);
1043 }
1044
1045 /* Is this position visible in the pane? */
1046 static int
1047 tty_is_visible(__unused struct tty *tty, const struct tty_ctx *ctx, u_int px,
1048 u_int py, u_int nx, u_int ny)
1049 {
1050 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1051
1052 if (!ctx->bigger)
1053 return (1);
1054
1055 if (xoff + nx <= ctx->wox || xoff >= ctx->wox + ctx->wsx ||
1056 yoff + ny <= ctx->woy || yoff >= ctx->woy + ctx->wsy)
1057 return (0);
1058 return (1);
1059 }
1060
1061 /* Clamp line position to visible part of pane. */
1062 static int
1063 tty_clamp_line(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1064 u_int nx, u_int *i, u_int *x, u_int *rx, u_int *ry)
1065 {
1066 u_int xoff = ctx->rxoff + px;
1067
1068 if (!tty_is_visible(tty, ctx, px, py, nx, 1))
1069 return (0);
1070 *ry = ctx->yoff + py - ctx->woy;
1071
1072 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1073 /* All visible. */
1074 *i = 0;
1075 *x = ctx->xoff + px - ctx->wox;
1076 *rx = nx;
1077 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1078 /* Both left and right not visible. */
1079 *i = ctx->wox;
1080 *x = 0;
1081 *rx = ctx->wsx;
1082 } else if (xoff < ctx->wox) {
1083 /* Left not visible. */
1084 *i = ctx->wox - (ctx->xoff + px);
1085 *x = 0;
1086 *rx = nx - *i;
1087 } else {
1088 /* Right not visible. */
1089 *i = 0;
1090 *x = (ctx->xoff + px) - ctx->wox;
1091 *rx = ctx->wsx - *x;
1092 }
1093 if (*rx > nx)
1094 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1095
1096 return (1);
1097 }
1098
1099 /* Clear a line. */
1100 static void
1101 tty_clear_line(struct tty *tty, const struct grid_cell *defaults, u_int py,
1102 u_int px, u_int nx, u_int bg)
1103 {
1104 struct client *c = tty->client;
1105 struct overlay_ranges r;
1106 u_int i;
1107
1108 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1109
1110 /* Nothing to clear. */
1111 if (nx == 0)
1112 return;
1113
1114 /* If genuine BCE is available, can try escape sequences. */
1115 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1116 /* Off the end of the line, use EL if available. */
1117 if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) {
1118 tty_cursor(tty, px, py);
1119 tty_putcode(tty, TTYC_EL);
1120 return;
1121 }
1122
1123 /* At the start of the line. Use EL1. */
1124 if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) {
1125 tty_cursor(tty, px + nx - 1, py);
1126 tty_putcode(tty, TTYC_EL1);
1127 return;
1128 }
1129
1130 /* Section of line. Use ECH if possible. */
1131 if (tty_term_has(tty->term, TTYC_ECH)) {
1132 tty_cursor(tty, px, py);
1133 tty_putcode_i(tty, TTYC_ECH, nx);
1134 return;
1135 }
1136 }
1137
1138 /*
1139 * Couldn't use an escape sequence, use spaces. Clear only the visible
1140 * bit if there is an overlay.
1141 */
1142 tty_check_overlay_range(tty, px, py, nx, &r);
1143 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
1144 if (r.nx[i] == 0)
1145 continue;
1146 tty_cursor(tty, r.px[i], py);
1147 tty_repeat_space(tty, r.nx[i]);
1148 }
1149 }
1150
1151 /* Clear a line, adjusting to visible part of pane. */
1152 static void
1153 tty_clear_pane_line(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1154 u_int px, u_int nx, u_int bg)
1155 {
1156 struct client *c = tty->client;
1157 u_int i, x, rx, ry;
1158
1159 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1160
1161 if (tty_clamp_line(tty, ctx, px, py, nx, &i, &x, &rx, &ry))
1162 tty_clear_line(tty, &ctx->defaults, ry, x, rx, bg);
1163 }
1164
1165 /* Clamp area position to visible part of pane. */
1166 static int
1167 tty_clamp_area(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1168 u_int nx, u_int ny, u_int *i, u_int *j, u_int *x, u_int *y, u_int *rx,
1169 u_int *ry)
1170 {
1171 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1172
1173 if (!tty_is_visible(tty, ctx, px, py, nx, ny))
1174 return (0);
1175
1176 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1177 /* All visible. */
1178 *i = 0;
1179 *x = ctx->xoff + px - ctx->wox;
1180 *rx = nx;
1181 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1182 /* Both left and right not visible. */
1183 *i = ctx->wox;
1184 *x = 0;
1185 *rx = ctx->wsx;
1186 } else if (xoff < ctx->wox) {
1187 /* Left not visible. */
1188 *i = ctx->wox - (ctx->xoff + px);
1189 *x = 0;
1190 *rx = nx - *i;
1191 } else {
1192 /* Right not visible. */
1193 *i = 0;
1194 *x = (ctx->xoff + px) - ctx->wox;
1195 *rx = ctx->wsx - *x;
1196 }
1197 if (*rx > nx)
1198 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1199
1200 if (yoff >= ctx->woy && yoff + ny <= ctx->woy + ctx->wsy) {
1201 /* All visible. */
1202 *j = 0;
1203 *y = ctx->yoff + py - ctx->woy;
1204 *ry = ny;
1205 } else if (yoff < ctx->woy && yoff + ny > ctx->woy + ctx->wsy) {
1206 /* Both top and bottom not visible. */
1207 *j = ctx->woy;
1208 *y = 0;
1209 *ry = ctx->wsy;
1210 } else if (yoff < ctx->woy) {
1211 /* Top not visible. */
1212 *j = ctx->woy - (ctx->yoff + py);
1213 *y = 0;
1214 *ry = ny - *j;
1215 } else {
1216 /* Bottom not visible. */
1217 *j = 0;
1218 *y = (ctx->yoff + py) - ctx->woy;
1219 *ry = ctx->wsy - *y;
1220 }
1221 if (*ry > ny)
1222 fatalx("%s: y too big, %u > %u", __func__, *ry, ny);
1223
1224 return (1);
1225 }
1226
1227 /* Clear an area, adjusting to visible part of pane. */
1228 static void
1229 tty_clear_area(struct tty *tty, const struct grid_cell *defaults, u_int py,
1230 u_int ny, u_int px, u_int nx, u_int bg)
1231 {
1232 struct client *c = tty->client;
1233 u_int yy;
1234 char tmp[64];
1235
1236 log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py);
1237
1238 /* Nothing to clear. */
1239 if (nx == 0 || ny == 0)
1240 return;
1241
1242 /* If genuine BCE is available, can try escape sequences. */
1243 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1244 /* Use ED if clearing off the bottom of the terminal. */
1245 if (px == 0 &&
1246 px + nx >= tty->sx &&
1247 py + ny >= tty->sy &&
1248 tty_term_has(tty->term, TTYC_ED)) {
1249 tty_cursor(tty, 0, py);
1250 tty_putcode(tty, TTYC_ED);
1251 return;
1252 }
1253
1254 /*
1255 * On VT420 compatible terminals we can use DECFRA if the
1256 * background colour isn't default (because it doesn't work
1257 * after SGR 0).
1258 */
1259 if ((tty->term->flags & TERM_DECFRA) && !COLOUR_DEFAULT(bg)) {
1260 xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
1261 py + 1, px + 1, py + ny, px + nx);
1262 tty_puts(tty, tmp);
1263 return;
1264 }
1265
1266 /* Full lines can be scrolled away to clear them. */
1267 if (px == 0 &&
1268 px + nx >= tty->sx &&
1269 ny > 2 &&
1270 tty_term_has(tty->term, TTYC_CSR) &&
1271 tty_term_has(tty->term, TTYC_INDN)) {
1272 tty_region(tty, py, py + ny - 1);
1273 tty_margin_off(tty);
1274 tty_putcode_i(tty, TTYC_INDN, ny);
1275 return;
1276 }
1277
1278 /*
1279 * If margins are supported, can just scroll the area off to
1280 * clear it.
1281 */
1282 if (nx > 2 &&
1283 ny > 2 &&
1284 tty_term_has(tty->term, TTYC_CSR) &&
1285 tty_use_margin(tty) &&
1286 tty_term_has(tty->term, TTYC_INDN)) {
1287 tty_region(tty, py, py + ny - 1);
1288 tty_margin(tty, px, px + nx - 1);
1289 tty_putcode_i(tty, TTYC_INDN, ny);
1290 return;
1291 }
1292 }
1293
1294 /* Couldn't use an escape sequence, loop over the lines. */
1295 for (yy = py; yy < py + ny; yy++)
1296 tty_clear_line(tty, defaults, yy, px, nx, bg);
1297 }
1298
1299 /* Clear an area in a pane. */
1300 static void
1301 tty_clear_pane_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1302 u_int ny, u_int px, u_int nx, u_int bg)
1303 {
1304 u_int i, j, x, y, rx, ry;
1305
1306 if (tty_clamp_area(tty, ctx, px, py, nx, ny, &i, &j, &x, &y, &rx, &ry))
1307 tty_clear_area(tty, &ctx->defaults, y, ry, x, rx, bg);
1308 }
1309
1310 static void
1311 tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
1312 {
1313 struct screen *s = ctx->s;
1314 u_int nx = ctx->sx, i, x, rx, ry;
1315
1316 log_debug("%s: %s %u %d", __func__, tty->client->name, py, ctx->bigger);
1317
1318 if (!ctx->bigger) {
1319 tty_draw_line(tty, s, 0, py, nx, ctx->xoff, ctx->yoff + py,
1320 &ctx->defaults, ctx->palette);
1321 return;
1322 }
1323 if (tty_clamp_line(tty, ctx, 0, py, nx, &i, &x, &rx, &ry)) {
1324 tty_draw_line(tty, s, i, py, rx, x, ry, &ctx->defaults,
1325 ctx->palette);
1326 }
1327 }
1328
1329 static const struct grid_cell *
1330 tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
1331 {
1332 static struct grid_cell new;
1333 int c;
1334
1335 /* Characters less than 0x7f are always fine, no matter what. */
1336 if (gc->data.size == 1 && *gc->data.data < 0x7f)
1337 return (gc);
1338
1339 /* UTF-8 terminal and a UTF-8 character - fine. */
1340 if (tty->client->flags & CLIENT_UTF8)
1341 return (gc);
1342 memcpy(&new, gc, sizeof new);
1343
1344 /* See if this can be mapped to an ACS character. */
1345 c = tty_acs_reverse_get(tty, gc->data.data, gc->data.size);
1346 if (c != -1) {
1347 utf8_set(&new.data, c);
1348 new.attr |= GRID_ATTR_CHARSET;
1349 return (&new);
1350 }
1351
1352 /* Replace by the right number of underscores. */
1353 new.data.size = gc->data.width;
1354 if (new.data.size > UTF8_SIZE)
1355 new.data.size = UTF8_SIZE;
1356 memset(new.data.data, '_', new.data.size);
1357 return (&new);
1358 }
1359
1360 /*
1361 * Check if a single character is obstructed by the overlay and return a
1362 * boolean.
1363 */
1364 static int
1365 tty_check_overlay(struct tty *tty, u_int px, u_int py)
1366 {
1367 struct overlay_ranges r;
1368
1369 /*
1370 * A unit width range will always return nx[2] == 0 from a check, even
1371 * with multiple overlays, so it's sufficient to check just the first
1372 * two entries.
1373 */
1374 tty_check_overlay_range(tty, px, py, 1, &r);
1375 if (r.nx[0] + r.nx[1] == 0)
1376 return (0);
1377 return (1);
1378 }
1379
1380 /* Return parts of the input range which are visible. */
1381 static void
1382 tty_check_overlay_range(struct tty *tty, u_int px, u_int py, u_int nx,
1383 struct overlay_ranges *r)
1384 {
1385 struct client *c = tty->client;
1386
1387 if (c->overlay_check == NULL) {
1388 r->px[0] = px;
1389 r->nx[0] = nx;
1390 r->px[1] = 0;
1391 r->nx[1] = 0;
1392 r->px[2] = 0;
1393 r->nx[2] = 0;
1394 return;
1395 }
1396
1397 c->overlay_check(c, c->overlay_data, px, py, nx, r);
1398 }
1399
1400 void
1401 tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
1402 u_int atx, u_int aty, const struct grid_cell *defaults,
1403 struct colour_palette *palette)
1404 {
1405 struct grid *gd = s->grid;
1406 struct grid_cell gc, last;
1407 const struct grid_cell *gcp;
1408 struct grid_line *gl;
1409 struct client *c = tty->client;
1410 struct overlay_ranges r;
1411 u_int i, j, ux, sx, width, hidden, eux, nxx;
1412 u_int cellsize;
1413 int flags, cleared = 0, wrapped = 0;
1414 char buf[512];
1415 size_t len;
1416
1417 log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__,
1418 px, py, nx, atx, aty);
1419 log_debug("%s: defaults: fg=%d, bg=%d", __func__, defaults->fg,
1420 defaults->bg);
1421
1422 /*
1423 * py is the line in the screen to draw.
1424 * px is the start x and nx is the width to draw.
1425 * atx,aty is the line on the terminal to draw it.
1426 */
1427
1428 flags = (tty->flags & TTY_NOCURSOR);
1429 tty->flags |= TTY_NOCURSOR;
1430 tty_update_mode(tty, tty->mode, s);
1431
1432 tty_region_off(tty);
1433 tty_margin_off(tty);
1434
1435 /*
1436 * Clamp the width to cellsize - note this is not cellused, because
1437 * there may be empty background cells after it (from BCE).
1438 */
1439 sx = screen_size_x(s);
1440 if (nx > sx)
1441 nx = sx;
1442 cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
1443 if (sx > cellsize)
1444 sx = cellsize;
1445 if (sx > tty->sx)
1446 sx = tty->sx;
1447 if (sx > nx)
1448 sx = nx;
1449 ux = 0;
1450
1451 if (py == 0)
1452 gl = NULL;
1453 else
1454 gl = grid_get_line(gd, gd->hsize + py - 1);
1455 if (gl == NULL ||
1456 (~gl->flags & GRID_LINE_WRAPPED) ||
1457 atx != 0 ||
1458 tty->cx < tty->sx ||
1459 nx < tty->sx) {
1460 if (nx < tty->sx &&
1461 atx == 0 &&
1462 px + sx != nx &&
1463 tty_term_has(tty->term, TTYC_EL1) &&
1464 !tty_fake_bce(tty, defaults, 8) &&
1465 c->overlay_check == NULL) {
1466 tty_default_attributes(tty, defaults, palette, 8,
1467 s->hyperlinks);
1468 tty_cursor(tty, nx - 1, aty);
1469 tty_putcode(tty, TTYC_EL1);
1470 cleared = 1;
1471 }
1472 } else {
1473 log_debug("%s: wrapped line %u", __func__, aty);
1474 wrapped = 1;
1475 }
1476
1477 memcpy(&last, &grid_default_cell, sizeof last);
1478 len = 0;
1479 width = 0;
1480
1481 for (i = 0; i < sx; i++) {
1482 grid_view_get_cell(gd, px + i, py, &gc);
1483 gcp = tty_check_codeset(tty, &gc);
1484 if (len != 0 &&
1485 (!tty_check_overlay(tty, atx + ux + width, aty) ||
1486 (gcp->attr & GRID_ATTR_CHARSET) ||
1487 gcp->flags != last.flags ||
1488 gcp->attr != last.attr ||
1489 gcp->fg != last.fg ||
1490 gcp->bg != last.bg ||
1491 gcp->us != last.us ||
1492 gcp->link != last.link ||
1493 ux + width + gcp->data.width > nx ||
1494 (sizeof buf) - len < gcp->data.size)) {
1495 tty_attributes(tty, &last, defaults, palette,
1496 s->hyperlinks);
1497 if (last.flags & GRID_FLAG_CLEARED) {
1498 log_debug("%s: %zu cleared", __func__, len);
1499 tty_clear_line(tty, defaults, aty, atx + ux,
1500 width, last.bg);
1501 } else {
1502 if (!wrapped || atx != 0 || ux != 0)
1503 tty_cursor(tty, atx + ux, aty);
1504 tty_putn(tty, buf, len, width);
1505 }
1506 ux += width;
1507
1508 len = 0;
1509 width = 0;
1510 wrapped = 0;
1511 }
1512
1513 if (gcp->flags & GRID_FLAG_SELECTED)
1514 screen_select_cell(s, &last, gcp);
1515 else
1516 memcpy(&last, gcp, sizeof last);
1517
1518 tty_check_overlay_range(tty, atx + ux, aty, gcp->data.width,
1519 &r);
1520 hidden = 0;
1521 for (j = 0; j < OVERLAY_MAX_RANGES; j++)
1522 hidden += r.nx[j];
1523 hidden = gcp->data.width - hidden;
1524 if (hidden != 0 && hidden == gcp->data.width) {
1525 if (~gcp->flags & GRID_FLAG_PADDING)
1526 ux += gcp->data.width;
1527 } else if (hidden != 0 || ux + gcp->data.width > nx) {
1528 if (~gcp->flags & GRID_FLAG_PADDING) {
1529 tty_attributes(tty, &last, defaults, palette,
1530 s->hyperlinks);
1531 for (j = 0; j < OVERLAY_MAX_RANGES; j++) {
1532 if (r.nx[j] == 0)
1533 continue;
1534 /* Effective width drawn so far. */
1535 eux = r.px[j] - atx;
1536 if (eux < nx) {
1537 tty_cursor(tty, r.px[j], aty);
1538 nxx = nx - eux;
1539 if (r.nx[j] > nxx)
1540 r.nx[j] = nxx;
1541 tty_repeat_space(tty, r.nx[j]);
1542 ux = eux + r.nx[j];
1543 }
1544 }
1545 }
1546 } else if (gcp->attr & GRID_ATTR_CHARSET) {
1547 tty_attributes(tty, &last, defaults, palette,
1548 s->hyperlinks);
1549 tty_cursor(tty, atx + ux, aty);
1550 for (j = 0; j < gcp->data.size; j++)
1551 tty_putc(tty, gcp->data.data[j]);
1552 ux += gcp->data.width;
1553 } else if (~gcp->flags & GRID_FLAG_PADDING) {
1554 memcpy(buf + len, gcp->data.data, gcp->data.size);
1555 len += gcp->data.size;
1556 width += gcp->data.width;
1557 }
1558 }
1559 if (len != 0 && ((~last.flags & GRID_FLAG_CLEARED) || last.bg != 8)) {
1560 tty_attributes(tty, &last, defaults, palette, s->hyperlinks);
1561 if (last.flags & GRID_FLAG_CLEARED) {
1562 log_debug("%s: %zu cleared (end)", __func__, len);
1563 tty_clear_line(tty, defaults, aty, atx + ux, width,
1564 last.bg);
1565 } else {
1566 if (!wrapped || atx != 0 || ux != 0)
1567 tty_cursor(tty, atx + ux, aty);
1568 tty_putn(tty, buf, len, width);
1569 }
1570 ux += width;
1571 }
1572
1573 if (!cleared && ux < nx) {
1574 log_debug("%s: %u to end of line (%zu cleared)", __func__,
1575 nx - ux, len);
1576 tty_default_attributes(tty, defaults, palette, 8,
1577 s->hyperlinks);
1578 tty_clear_line(tty, defaults, aty, atx + ux, nx - ux, 8);
1579 }
1580
1581 tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags;
1582 tty_update_mode(tty, tty->mode, s);
1583 }
1584
1585 void
1586 tty_sync_start(struct tty *tty)
1587 {
1588 if (tty->flags & TTY_BLOCK)
1589 return;
1590 if (tty->flags & TTY_SYNCING)
1591 return;
1592 tty->flags |= TTY_SYNCING;
1593
1594 if (tty_term_has(tty->term, TTYC_SYNC)) {
1595 log_debug("%s sync start", tty->client->name);
1596 tty_putcode_i(tty, TTYC_SYNC, 1);
1597 }
1598 }
1599
1600 void
1601 tty_sync_end(struct tty *tty)
1602 {
1603 if (tty->flags & TTY_BLOCK)
1604 return;
1605 if (~tty->flags & TTY_SYNCING)
1606 return;
1607 tty->flags &= ~TTY_SYNCING;
1608
1609 if (tty_term_has(tty->term, TTYC_SYNC)) {
1610 log_debug("%s sync end", tty->client->name);
1611 tty_putcode_i(tty, TTYC_SYNC, 2);
1612 }
1613 }
1614
1615 static int
1616 tty_client_ready(const struct tty_ctx *ctx, struct client *c)
1617 {
1618 if (c->session == NULL || c->tty.term == NULL)
1619 return (0);
1620 if (c->flags & CLIENT_SUSPENDED)
1621 return (0);
1622
1623 /*
1624 * If invisible panes are allowed (used for passthrough), don't care if
1625 * redrawing or frozen.
1626 */
1627 if (ctx->allow_invisible_panes)
1628 return (1);
1629
1630 if (c->flags & CLIENT_REDRAWWINDOW)
1631 return (0);
1632 if (c->tty.flags & TTY_FREEZE)
1633 return (0);
1634 return (1);
1635 }
1636
1637 void
1638 tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
1639 struct tty_ctx *ctx)
1640 {
1641 struct client *c;
1642 int state;
1643
1644 if (ctx->set_client_cb == NULL)
1645 return;
1646 TAILQ_FOREACH(c, &clients, entry) {
1647 if (tty_client_ready(ctx, c)) {
1648 state = ctx->set_client_cb(ctx, c);
1649 if (state == -1)
1650 break;
1651 if (state == 0)
1652 continue;
1653 cmdfn(&c->tty, ctx);
1654 }
1655 }
1656 }
1657
1658 void
1659 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
1660 {
1661 struct client *c = tty->client;
1662
1663 if (ctx->bigger ||
1664 !tty_full_width(tty, ctx) ||
1665 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1666 (!tty_term_has(tty->term, TTYC_ICH) &&
1667 !tty_term_has(tty->term, TTYC_ICH1)) ||
1668 c->overlay_check != NULL) {
1669 tty_draw_pane(tty, ctx, ctx->ocy);
1670 return;
1671 }
1672
1673 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1674 ctx->s->hyperlinks);
1675
1676 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1677
1678 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
1679 }
1680
1681 void
1682 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
1683 {
1684 struct client *c = tty->client;
1685
1686 if (ctx->bigger ||
1687 !tty_full_width(tty, ctx) ||
1688 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1689 (!tty_term_has(tty->term, TTYC_DCH) &&
1690 !tty_term_has(tty->term, TTYC_DCH1)) ||
1691 c->overlay_check != NULL) {
1692 tty_draw_pane(tty, ctx, ctx->ocy);
1693 return;
1694 }
1695
1696 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1697 ctx->s->hyperlinks);
1698
1699 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1700
1701 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
1702 }
1703
1704 void
1705 tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx)
1706 {
1707 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1708 ctx->s->hyperlinks);
1709
1710 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, ctx->num, ctx->bg);
1711 }
1712
1713 void
1714 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
1715 {
1716 struct client *c = tty->client;
1717
1718 if (ctx->bigger ||
1719 !tty_full_width(tty, ctx) ||
1720 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1721 !tty_term_has(tty->term, TTYC_CSR) ||
1722 !tty_term_has(tty->term, TTYC_IL1) ||
1723 ctx->sx == 1 ||
1724 ctx->sy == 1 ||
1725 c->overlay_check != NULL) {
1726 tty_redraw_region(tty, ctx);
1727 return;
1728 }
1729
1730 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1731 ctx->s->hyperlinks);
1732
1733 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1734 tty_margin_off(tty);
1735 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1736
1737 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
1738 tty->cx = tty->cy = UINT_MAX;
1739 }
1740
1741 void
1742 tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
1743 {
1744 struct client *c = tty->client;
1745
1746 if (ctx->bigger ||
1747 !tty_full_width(tty, ctx) ||
1748 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1749 !tty_term_has(tty->term, TTYC_CSR) ||
1750 !tty_term_has(tty->term, TTYC_DL1) ||
1751 ctx->sx == 1 ||
1752 ctx->sy == 1 ||
1753 c->overlay_check != NULL) {
1754 tty_redraw_region(tty, ctx);
1755 return;
1756 }
1757
1758 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1759 ctx->s->hyperlinks);
1760
1761 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1762 tty_margin_off(tty);
1763 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1764
1765 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
1766 tty->cx = tty->cy = UINT_MAX;
1767 }
1768
1769 void
1770 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
1771 {
1772 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1773 ctx->s->hyperlinks);
1774
1775 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->sx, ctx->bg);
1776 }
1777
1778 void
1779 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
1780 {
1781 u_int nx = ctx->sx - ctx->ocx;
1782
1783 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1784 ctx->s->hyperlinks);
1785
1786 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, nx, ctx->bg);
1787 }
1788
1789 void
1790 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
1791 {
1792 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1793 ctx->s->hyperlinks);
1794
1795 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->ocx + 1, ctx->bg);
1796 }
1797
1798 void
1799 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
1800 {
1801 struct client *c = tty->client;
1802
1803 if (ctx->ocy != ctx->orupper)
1804 return;
1805
1806 if (ctx->bigger ||
1807 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1808 tty_fake_bce(tty, &ctx->defaults, 8) ||
1809 !tty_term_has(tty->term, TTYC_CSR) ||
1810 (!tty_term_has(tty->term, TTYC_RI) &&
1811 !tty_term_has(tty->term, TTYC_RIN)) ||
1812 ctx->sx == 1 ||
1813 ctx->sy == 1 ||
1814 c->overlay_check != NULL) {
1815 tty_redraw_region(tty, ctx);
1816 return;
1817 }
1818
1819 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1820 ctx->s->hyperlinks);
1821
1822 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1823 tty_margin_pane(tty, ctx);
1824 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1825
1826 if (tty_term_has(tty->term, TTYC_RI))
1827 tty_putcode(tty, TTYC_RI);
1828 else
1829 tty_putcode_i(tty, TTYC_RIN, 1);
1830 }
1831
1832 void
1833 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
1834 {
1835 struct client *c = tty->client;
1836
1837 if (ctx->ocy != ctx->orlower)
1838 return;
1839
1840 if (ctx->bigger ||
1841 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1842 tty_fake_bce(tty, &ctx->defaults, 8) ||
1843 !tty_term_has(tty->term, TTYC_CSR) ||
1844 ctx->sx == 1 ||
1845 ctx->sy == 1 ||
1846 c->overlay_check != NULL) {
1847 tty_redraw_region(tty, ctx);
1848 return;
1849 }
1850
1851 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1852 ctx->s->hyperlinks);
1853
1854 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1855 tty_margin_pane(tty, ctx);
1856
1857 /*
1858 * If we want to wrap a pane while using margins, the cursor needs to
1859 * be exactly on the right of the region. If the cursor is entirely off
1860 * the edge - move it back to the right. Some terminals are funny about
1861 * this and insert extra spaces, so only use the right if margins are
1862 * enabled.
1863 */
1864 if (ctx->xoff + ctx->ocx > tty->rright) {
1865 if (!tty_use_margin(tty))
1866 tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
1867 else
1868 tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
1869 } else
1870 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1871
1872 tty_putc(tty, '\n');
1873 }
1874
1875 void
1876 tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
1877 {
1878 struct client *c = tty->client;
1879 u_int i;
1880
1881 if (ctx->bigger ||
1882 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1883 tty_fake_bce(tty, &ctx->defaults, 8) ||
1884 !tty_term_has(tty->term, TTYC_CSR) ||
1885 ctx->sx == 1 ||
1886 ctx->sy == 1 ||
1887 c->overlay_check != NULL) {
1888 tty_redraw_region(tty, ctx);
1889 return;
1890 }
1891
1892 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1893 ctx->s->hyperlinks);
1894
1895 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1896 tty_margin_pane(tty, ctx);
1897
1898 if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
1899 if (!tty_use_margin(tty))
1900 tty_cursor(tty, 0, tty->rlower);
1901 else
1902 tty_cursor(tty, tty->rright, tty->rlower);
1903 for (i = 0; i < ctx->num; i++)
1904 tty_putc(tty, '\n');
1905 } else {
1906 if (tty->cy == UINT_MAX)
1907 tty_cursor(tty, 0, 0);
1908 else
1909 tty_cursor(tty, 0, tty->cy);
1910 tty_putcode_i(tty, TTYC_INDN, ctx->num);
1911 }
1912 }
1913
1914 void
1915 tty_cmd_scrolldown(struct tty *tty, const struct tty_ctx *ctx)
1916 {
1917 u_int i;
1918 struct client *c = tty->client;
1919
1920 if (ctx->bigger ||
1921 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1922 tty_fake_bce(tty, &ctx->defaults, 8) ||
1923 !tty_term_has(tty->term, TTYC_CSR) ||
1924 (!tty_term_has(tty->term, TTYC_RI) &&
1925 !tty_term_has(tty->term, TTYC_RIN)) ||
1926 ctx->sx == 1 ||
1927 ctx->sy == 1 ||
1928 c->overlay_check != NULL) {
1929 tty_redraw_region(tty, ctx);
1930 return;
1931 }
1932
1933 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1934 ctx->s->hyperlinks);
1935
1936 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1937 tty_margin_pane(tty, ctx);
1938 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1939
1940 if (tty_term_has(tty->term, TTYC_RIN))
1941 tty_putcode_i(tty, TTYC_RIN, ctx->num);
1942 else {
1943 for (i = 0; i < ctx->num; i++)
1944 tty_putcode(tty, TTYC_RI);
1945 }
1946 }
1947
1948 void
1949 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
1950 {
1951 u_int px, py, nx, ny;
1952
1953 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1954 ctx->s->hyperlinks);
1955
1956 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1957 tty_margin_off(tty);
1958
1959 px = 0;
1960 nx = ctx->sx;
1961 py = ctx->ocy + 1;
1962 ny = ctx->sy - ctx->ocy - 1;
1963
1964 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1965
1966 px = ctx->ocx;
1967 nx = ctx->sx - ctx->ocx;
1968 py = ctx->ocy;
1969
1970 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1971 }
1972
1973 void
1974 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
1975 {
1976 u_int px, py, nx, ny;
1977
1978 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1979 ctx->s->hyperlinks);
1980
1981 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1982 tty_margin_off(tty);
1983
1984 px = 0;
1985 nx = ctx->sx;
1986 py = 0;
1987 ny = ctx->ocy;
1988
1989 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1990
1991 px = 0;
1992 nx = ctx->ocx + 1;
1993 py = ctx->ocy;
1994
1995 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1996 }
1997
1998 void
1999 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
2000 {
2001 u_int px, py, nx, ny;
2002
2003 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
2004 ctx->s->hyperlinks);
2005
2006 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
2007 tty_margin_off(tty);
2008
2009 px = 0;
2010 nx = ctx->sx;
2011 py = 0;
2012 ny = ctx->sy;
2013
2014 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
2015 }
2016
2017 void
2018 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
2019 {
2020 u_int i, j;
2021
2022 if (ctx->bigger) {
2023 ctx->redraw_cb(ctx);
2024 return;
2025 }
2026
2027 tty_attributes(tty, &grid_default_cell, &ctx->defaults, ctx->palette,
2028 ctx->s->hyperlinks);
2029
2030 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
2031 tty_margin_off(tty);
2032
2033 for (j = 0; j < ctx->sy; j++) {
2034 tty_cursor_pane(tty, ctx, 0, j);
2035 for (i = 0; i < ctx->sx; i++)
2036 tty_putc(tty, 'E');
2037 }
2038 }
2039
2040 void
2041 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
2042 {
2043 const struct grid_cell *gcp = ctx->cell;
2044 struct screen *s = ctx->s;
2045 struct overlay_ranges r;
2046 u_int px, py, i, vis = 0;
2047
2048 px = ctx->xoff + ctx->ocx - ctx->wox;
2049 py = ctx->yoff + ctx->ocy - ctx->woy;
2050 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, 1, 1) ||
2051 (gcp->data.width == 1 && !tty_check_overlay(tty, px, py)))
2052 return;
2053
2054 /* Handle partially obstructed wide characters. */
2055 if (gcp->data.width > 1) {
2056 tty_check_overlay_range(tty, px, py, gcp->data.width, &r);
2057 for (i = 0; i < OVERLAY_MAX_RANGES; i++)
2058 vis += r.nx[i];
2059 if (vis < gcp->data.width) {
2060 tty_draw_line(tty, s, s->cx, s->cy, gcp->data.width,
2061 px, py, &ctx->defaults, ctx->palette);
2062 return;
2063 }
2064 }
2065
2066 if (ctx->xoff + ctx->ocx - ctx->wox > tty->sx - 1 &&
2067 ctx->ocy == ctx->orlower &&
2068 tty_full_width(tty, ctx))
2069 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
2070
2071 tty_margin_off(tty);
2072 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2073
2074 tty_cell(tty, ctx->cell, &ctx->defaults, ctx->palette,
2075 ctx->s->hyperlinks);
2076 }
2077
2078 void
2079 tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx)
2080 {
2081 struct overlay_ranges r;
2082 u_int i, px, py, cx;
2083 char *cp = ctx->ptr;
2084
2085 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, ctx->num, 1))
2086 return;
2087
2088 if (ctx->bigger &&
2089 (ctx->xoff + ctx->ocx < ctx->wox ||
2090 ctx->xoff + ctx->ocx + ctx->num > ctx->wox + ctx->wsx)) {
2091 if (!ctx->wrapped ||
2092 !tty_full_width(tty, ctx) ||
2093 (tty->term->flags & TERM_NOAM) ||
2094 ctx->xoff + ctx->ocx != 0 ||
2095 ctx->yoff + ctx->ocy != tty->cy + 1 ||
2096 tty->cx < tty->sx ||
2097 tty->cy == tty->rlower)
2098 tty_draw_pane(tty, ctx, ctx->ocy);
2099 else
2100 ctx->redraw_cb(ctx);
2101 return;
2102 }
2103
2104 tty_margin_off(tty);
2105 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2106 tty_attributes(tty, ctx->cell, &ctx->defaults, ctx->palette, ctx->s->hyperlinks);
2107
2108 /* Get tty position from pane position for overlay check. */
2109 px = ctx->xoff + ctx->ocx - ctx->wox;
2110 py = ctx->yoff + ctx->ocy - ctx->woy;
2111
2112 tty_check_overlay_range(tty, px, py, ctx->num, &r);
2113 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
2114 if (r.nx[i] == 0)
2115 continue;
2116 /* Convert back to pane position for printing. */
2117 cx = r.px[i] - ctx->xoff + ctx->wox;
2118 tty_cursor_pane_unless_wrap(tty, ctx, cx, ctx->ocy);
2119 tty_putn(tty, cp + r.px[i] - px, r.nx[i], r.nx[i]);
2120 }
2121 }
2122
2123 void
2124 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
2125 {
2126 tty_set_selection(tty, ctx->ptr2, ctx->ptr, ctx->num);
2127 }
2128
2129 void
2130 tty_set_selection(struct tty *tty, const char *flags, const char *buf,
2131 size_t len)
2132 {
2133 char *encoded;
2134 size_t size;
2135
2136 if (~tty->flags & TTY_STARTED)
2137 return;
2138 if (!tty_term_has(tty->term, TTYC_MS))
2139 return;
2140
2141 size = 4 * ((len + 2) / 3) + 1; /* storage for base64 */
2142 encoded = xmalloc(size);
2143
2144 b64_ntop(buf, len, encoded, size);
2145 tty->flags |= TTY_NOBLOCK;
2146 tty_putcode_ss(tty, TTYC_MS, flags, encoded);
2147
2148 free(encoded);
2149 }
2150
2151 void
2152 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
2153 {
2154 tty->flags |= TTY_NOBLOCK;
2155 tty_add(tty, ctx->ptr, ctx->num);
2156 tty_invalidate(tty);
2157 }
2158
2159 void
2160 tty_cmd_syncstart(struct tty *tty, const struct tty_ctx *ctx)
2161 {
2162 if (ctx->num == 0x11) {
2163 /*
2164 * This is an overlay and a command that moves the cursor so
2165 * start synchronized updates.
2166 */
2167 tty_sync_start(tty);
2168 } else if (~ctx->num & 0x10) {
2169 /*
2170 * This is a pane. If there is an overlay, always start;
2171 * otherwise, only if requested.
2172 */
2173 if (ctx->num || tty->client->overlay_draw != NULL)
2174 tty_sync_start(tty);
2175 }
2176 }
2177
2178 void
2179 tty_cell(struct tty *tty, const struct grid_cell *gc,
2180 const struct grid_cell *defaults, struct colour_palette *palette,
2181 struct hyperlinks *hl)
2182 {
2183 const struct grid_cell *gcp;
2184
2185 /* Skip last character if terminal is stupid. */
2186 if ((tty->term->flags & TERM_NOAM) &&
2187 tty->cy == tty->sy - 1 &&
2188 tty->cx == tty->sx - 1)
2189 return;
2190
2191 /* If this is a padding character, do nothing. */
2192 if (gc->flags & GRID_FLAG_PADDING)
2193 return;
2194
2195 /* Check the output codeset and apply attributes. */
2196 gcp = tty_check_codeset(tty, gc);
2197 tty_attributes(tty, gcp, defaults, palette, hl);
2198
2199 /* If it is a single character, write with putc to handle ACS. */
2200 if (gcp->data.size == 1) {
2201 tty_attributes(tty, gcp, defaults, palette, hl);
2202 if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f)
2203 return;
2204 tty_putc(tty, *gcp->data.data);
2205 return;
2206 }
2207
2208 /* Write the data. */
2209 tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width);
2210 }
2211
2212 void
2213 tty_reset(struct tty *tty)
2214 {
2215 struct grid_cell *gc = &tty->cell;
2216
2217 if (!grid_cells_equal(gc, &grid_default_cell)) {
2218 if (gc->link != 0)
2219 tty_putcode_ss(tty, TTYC_HLS, "", "");
2220 if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2221 tty_putcode(tty, TTYC_RMACS);
2222 tty_putcode(tty, TTYC_SGR0);
2223 memcpy(gc, &grid_default_cell, sizeof *gc);
2224 }
2225 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2226 }
2227
2228 static void
2229 tty_invalidate(struct tty *tty)
2230 {
2231 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
2232 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2233
2234 tty->cx = tty->cy = UINT_MAX;
2235 tty->rupper = tty->rleft = UINT_MAX;
2236 tty->rlower = tty->rright = UINT_MAX;
2237
2238 if (tty->flags & TTY_STARTED) {
2239 if (tty_use_margin(tty))
2240 tty_putcode(tty, TTYC_ENMG);
2241 tty_putcode(tty, TTYC_SGR0);
2242
2243 tty->mode = ALL_MODES;
2244 tty_update_mode(tty, MODE_CURSOR, NULL);
2245
2246 tty_cursor(tty, 0, 0);
2247 tty_region_off(tty);
2248 tty_margin_off(tty);
2249 } else
2250 tty->mode = MODE_CURSOR;
2251 }
2252
2253 /* Turn off margin. */
2254 void
2255 tty_region_off(struct tty *tty)
2256 {
2257 tty_region(tty, 0, tty->sy - 1);
2258 }
2259
2260 /* Set region inside pane. */
2261 static void
2262 tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper,
2263 u_int rlower)
2264 {
2265 tty_region(tty, ctx->yoff + rupper - ctx->woy,
2266 ctx->yoff + rlower - ctx->woy);
2267 }
2268
2269 /* Set region at absolute position. */
2270 static void
2271 tty_region(struct tty *tty, u_int rupper, u_int rlower)
2272 {
2273 if (tty->rlower == rlower && tty->rupper == rupper)
2274 return;
2275 if (!tty_term_has(tty->term, TTYC_CSR))
2276 return;
2277
2278 tty->rupper = rupper;
2279 tty->rlower = rlower;
2280
2281 /*
2282 * Some terminals (such as PuTTY) do not correctly reset the cursor to
2283 * 0,0 if it is beyond the last column (they do not reset their wrap
2284 * flag so further output causes a line feed). As a workaround, do an
2285 * explicit move to 0 first.
2286 */
2287 if (tty->cx >= tty->sx) {
2288 if (tty->cy == UINT_MAX)
2289 tty_cursor(tty, 0, 0);
2290 else
2291 tty_cursor(tty, 0, tty->cy);
2292 }
2293
2294 tty_putcode_ii(tty, TTYC_CSR, tty->rupper, tty->rlower);
2295 tty->cx = tty->cy = UINT_MAX;
2296 }
2297
2298 /* Turn off margin. */
2299 void
2300 tty_margin_off(struct tty *tty)
2301 {
2302 tty_margin(tty, 0, tty->sx - 1);
2303 }
2304
2305 /* Set margin inside pane. */
2306 static void
2307 tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx)
2308 {
2309 tty_margin(tty, ctx->xoff - ctx->wox,
2310 ctx->xoff + ctx->sx - 1 - ctx->wox);
2311 }
2312
2313 /* Set margin at absolute position. */
2314 static void
2315 tty_margin(struct tty *tty, u_int rleft, u_int rright)
2316 {
2317 if (!tty_use_margin(tty))
2318 return;
2319 if (tty->rleft == rleft && tty->rright == rright)
2320 return;
2321
2322 tty_putcode_ii(tty, TTYC_CSR, tty->rupper, tty->rlower);
2323
2324 tty->rleft = rleft;
2325 tty->rright = rright;
2326
2327 if (rleft == 0 && rright == tty->sx - 1)
2328 tty_putcode(tty, TTYC_CLMG);
2329 else
2330 tty_putcode_ii(tty, TTYC_CMG, rleft, rright);
2331 tty->cx = tty->cy = UINT_MAX;
2332 }
2333
2334 /*
2335 * Move the cursor, unless it would wrap itself when the next character is
2336 * printed.
2337 */
2338 static void
2339 tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx,
2340 u_int cx, u_int cy)
2341 {
2342 if (!ctx->wrapped ||
2343 !tty_full_width(tty, ctx) ||
2344 (tty->term->flags & TERM_NOAM) ||
2345 ctx->xoff + cx != 0 ||
2346 ctx->yoff + cy != tty->cy + 1 ||
2347 tty->cx < tty->sx ||
2348 tty->cy == tty->rlower)
2349 tty_cursor_pane(tty, ctx, cx, cy);
2350 else
2351 log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy);
2352 }
2353
2354 /* Move cursor inside pane. */
2355 static void
2356 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
2357 {
2358 tty_cursor(tty, ctx->xoff + cx - ctx->wox, ctx->yoff + cy - ctx->woy);
2359 }
2360
2361 /* Move cursor to absolute position. */
2362 void
2363 tty_cursor(struct tty *tty, u_int cx, u_int cy)
2364 {
2365 struct tty_term *term = tty->term;
2366 u_int thisx, thisy;
2367 int change;
2368
2369 if (tty->flags & TTY_BLOCK)
2370 return;
2371
2372 thisx = tty->cx;
2373 thisy = tty->cy;
2374
2375 /*
2376 * If in the automargin space, and want to be there, do not move.
2377 * Otherwise, force the cursor to be in range (and complain).
2378 */
2379 if (cx == thisx && cy == thisy && cx == tty->sx)
2380 return;
2381 if (cx > tty->sx - 1) {
2382 log_debug("%s: x too big %u > %u", __func__, cx, tty->sx - 1);
2383 cx = tty->sx - 1;
2384 }
2385
2386 /* No change. */
2387 if (cx == thisx && cy == thisy)
2388 return;
2389
2390 /* Currently at the very end of the line - use absolute movement. */
2391 if (thisx > tty->sx - 1)
2392 goto absolute;
2393
2394 /* Move to home position (0, 0). */
2395 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
2396 tty_putcode(tty, TTYC_HOME);
2397 goto out;
2398 }
2399
2400 /* Zero on the next line. */
2401 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower &&
2402 (!tty_use_margin(tty) || tty->rleft == 0)) {
2403 tty_putc(tty, '\r');
2404 tty_putc(tty, '\n');
2405 goto out;
2406 }
2407
2408 /* Moving column or row. */
2409 if (cy == thisy) {
2410 /*
2411 * Moving column only, row staying the same.
2412 */
2413
2414 /* To left edge. */
2415 if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) {
2416 tty_putc(tty, '\r');
2417 goto out;
2418 }
2419
2420 /* One to the left. */
2421 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
2422 tty_putcode(tty, TTYC_CUB1);
2423 goto out;
2424 }
2425
2426 /* One to the right. */
2427 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
2428 tty_putcode(tty, TTYC_CUF1);
2429 goto out;
2430 }
2431
2432 /* Calculate difference. */
2433 change = thisx - cx; /* +ve left, -ve right */
2434
2435 /*
2436 * Use HPA if change is larger than absolute, otherwise move
2437 * the cursor with CUB/CUF.
2438 */
2439 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
2440 tty_putcode_i(tty, TTYC_HPA, cx);
2441 goto out;
2442 } else if (change > 0 &&
2443 tty_term_has(term, TTYC_CUB) &&
2444 !tty_use_margin(tty)) {
2445 if (change == 2 && tty_term_has(term, TTYC_CUB1)) {
2446 tty_putcode(tty, TTYC_CUB1);
2447 tty_putcode(tty, TTYC_CUB1);
2448 goto out;
2449 }
2450 tty_putcode_i(tty, TTYC_CUB, change);
2451 goto out;
2452 } else if (change < 0 &&
2453 tty_term_has(term, TTYC_CUF) &&
2454 !tty_use_margin(tty)) {
2455 tty_putcode_i(tty, TTYC_CUF, -change);
2456 goto out;
2457 }
2458 } else if (cx == thisx) {
2459 /*
2460 * Moving row only, column staying the same.
2461 */
2462
2463 /* One above. */
2464 if (thisy != tty->rupper &&
2465 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
2466 tty_putcode(tty, TTYC_CUU1);
2467 goto out;
2468 }
2469
2470 /* One below. */
2471 if (thisy != tty->rlower &&
2472 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
2473 tty_putcode(tty, TTYC_CUD1);
2474 goto out;
2475 }
2476
2477 /* Calculate difference. */
2478 change = thisy - cy; /* +ve up, -ve down */
2479
2480 /*
2481 * Try to use VPA if change is larger than absolute or if this
2482 * change would cross the scroll region, otherwise use CUU/CUD.
2483 */
2484 if ((u_int) abs(change) > cy ||
2485 (change < 0 && cy - change > tty->rlower) ||
2486 (change > 0 && cy - change < tty->rupper)) {
2487 if (tty_term_has(term, TTYC_VPA)) {
2488 tty_putcode_i(tty, TTYC_VPA, cy);
2489 goto out;
2490 }
2491 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
2492 tty_putcode_i(tty, TTYC_CUU, change);
2493 goto out;
2494 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
2495 tty_putcode_i(tty, TTYC_CUD, -change);
2496 goto out;
2497 }
2498 }
2499
2500 absolute:
2501 /* Absolute movement. */
2502 tty_putcode_ii(tty, TTYC_CUP, cy, cx);
2503
2504 out:
2505 tty->cx = cx;
2506 tty->cy = cy;
2507 }
2508
2509 static void
2510 tty_hyperlink(struct tty *tty, const struct grid_cell *gc,
2511 struct hyperlinks *hl)
2512 {
2513 const char *uri, *id;
2514
2515 if (gc->link == tty->cell.link)
2516 return;
2517 tty->cell.link = gc->link;
2518
2519 if (hl == NULL)
2520 return;
2521
2522 if (gc->link == 0 || !hyperlinks_get(hl, gc->link, &uri, NULL, &id))
2523 tty_putcode_ss(tty, TTYC_HLS, "", "");
2524 else
2525 tty_putcode_ss(tty, TTYC_HLS, id, uri);
2526 }
2527
2528 void
2529 tty_attributes(struct tty *tty, const struct grid_cell *gc,
2530 const struct grid_cell *defaults, struct colour_palette *palette,
2531 struct hyperlinks *hl)
2532 {
2533 struct grid_cell *tc = &tty->cell, gc2;
2534 int changed;
2535
2536 /* Copy cell and update default colours. */
2537 memcpy(&gc2, gc, sizeof gc2);
2538 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2539 if (gc2.fg == 8)
2540 gc2.fg = defaults->fg;
2541 if (gc2.bg == 8)
2542 gc2.bg = defaults->bg;
2543 }
2544
2545 /* Ignore cell if it is the same as the last one. */
2546 if (gc2.attr == tty->last_cell.attr &&
2547 gc2.fg == tty->last_cell.fg &&
2548 gc2.bg == tty->last_cell.bg &&
2549 gc2.us == tty->last_cell.us &&
2550 gc2.link == tty->last_cell.link)
2551 return;
2552
2553 /*
2554 * If no setab, try to use the reverse attribute as a best-effort for a
2555 * non-default background. This is a bit of a hack but it doesn't do
2556 * any serious harm and makes a couple of applications happier.
2557 */
2558 if (!tty_term_has(tty->term, TTYC_SETAB)) {
2559 if (gc2.attr & GRID_ATTR_REVERSE) {
2560 if (gc2.fg != 7 && !COLOUR_DEFAULT(gc2.fg))
2561 gc2.attr &= ~GRID_ATTR_REVERSE;
2562 } else {
2563 if (gc2.bg != 0 && !COLOUR_DEFAULT(gc2.bg))
2564 gc2.attr |= GRID_ATTR_REVERSE;
2565 }
2566 }
2567
2568 /* Fix up the colours if necessary. */
2569 tty_check_fg(tty, palette, &gc2);
2570 tty_check_bg(tty, palette, &gc2);
2571 tty_check_us(tty, palette, &gc2);
2572
2573 /*
2574 * If any bits are being cleared or the underline colour is now default,
2575 * reset everything.
2576 */
2577 if ((tc->attr & ~gc2.attr) || (tc->us != gc2.us && gc2.us == 0))
2578 tty_reset(tty);
2579
2580 /*
2581 * Set the colours. This may call tty_reset() (so it comes next) and
2582 * may add to (NOT remove) the desired attributes.
2583 */
2584 tty_colours(tty, &gc2);
2585
2586 /* Filter out attribute bits already set. */
2587 changed = gc2.attr & ~tc->attr;
2588 tc->attr = gc2.attr;
2589
2590 /* Set the attributes. */
2591 if (changed & GRID_ATTR_BRIGHT)
2592 tty_putcode(tty, TTYC_BOLD);
2593 if (changed & GRID_ATTR_DIM)
2594 tty_putcode(tty, TTYC_DIM);
2595 if (changed & GRID_ATTR_ITALICS)
2596 tty_set_italics(tty);
2597 if (changed & GRID_ATTR_ALL_UNDERSCORE) {
2598 if ((changed & GRID_ATTR_UNDERSCORE) ||
2599 !tty_term_has(tty->term, TTYC_SMULX))
2600 tty_putcode(tty, TTYC_SMUL);
2601 else if (changed & GRID_ATTR_UNDERSCORE_2)
2602 tty_putcode_i(tty, TTYC_SMULX, 2);
2603 else if (changed & GRID_ATTR_UNDERSCORE_3)
2604 tty_putcode_i(tty, TTYC_SMULX, 3);
2605 else if (changed & GRID_ATTR_UNDERSCORE_4)
2606 tty_putcode_i(tty, TTYC_SMULX, 4);
2607 else if (changed & GRID_ATTR_UNDERSCORE_5)
2608 tty_putcode_i(tty, TTYC_SMULX, 5);
2609 }
2610 if (changed & GRID_ATTR_BLINK)
2611 tty_putcode(tty, TTYC_BLINK);
2612 if (changed & GRID_ATTR_REVERSE) {
2613 if (tty_term_has(tty->term, TTYC_REV))
2614 tty_putcode(tty, TTYC_REV);
2615 else if (tty_term_has(tty->term, TTYC_SMSO))
2616 tty_putcode(tty, TTYC_SMSO);
2617 }
2618 if (changed & GRID_ATTR_HIDDEN)
2619 tty_putcode(tty, TTYC_INVIS);
2620 if (changed & GRID_ATTR_STRIKETHROUGH)
2621 tty_putcode(tty, TTYC_SMXX);
2622 if (changed & GRID_ATTR_OVERLINE)
2623 tty_putcode(tty, TTYC_SMOL);
2624 if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2625 tty_putcode(tty, TTYC_SMACS);
2626
2627 /* Set hyperlink if any. */
2628 tty_hyperlink(tty, gc, hl);
2629
2630 memcpy(&tty->last_cell, &gc2, sizeof tty->last_cell);
2631 }
2632
2633 static void
2634 tty_colours(struct tty *tty, const struct grid_cell *gc)
2635 {
2636 struct grid_cell *tc = &tty->cell;
2637 int have_ax;
2638
2639 /* No changes? Nothing is necessary. */
2640 if (gc->fg == tc->fg && gc->bg == tc->bg && gc->us == tc->us)
2641 return;
2642
2643 /*
2644 * Is either the default colour? This is handled specially because the
2645 * best solution might be to reset both colours to default, in which
2646 * case if only one is default need to fall onward to set the other
2647 * colour.
2648 */
2649 if (COLOUR_DEFAULT(gc->fg) || COLOUR_DEFAULT(gc->bg)) {
2650 /*
2651 * If don't have AX but do have op, send sgr0 (op can't
2652 * actually be used because it is sometimes the same as sgr0
2653 * and sometimes isn't). This resets both colours to default.
2654 *
2655 * Otherwise, try to set the default colour only as needed.
2656 */
2657 have_ax = tty_term_flag(tty->term, TTYC_AX);
2658 if (!have_ax && tty_term_has(tty->term, TTYC_OP))
2659 tty_reset(tty);
2660 else {
2661 if (COLOUR_DEFAULT(gc->fg) && !COLOUR_DEFAULT(tc->fg)) {
2662 if (have_ax)
2663 tty_puts(tty, "\033[39m");
2664 else if (tc->fg != 7)
2665 tty_putcode_i(tty, TTYC_SETAF, 7);
2666 tc->fg = gc->fg;
2667 }
2668 if (COLOUR_DEFAULT(gc->bg) && !COLOUR_DEFAULT(tc->bg)) {
2669 if (have_ax)
2670 tty_puts(tty, "\033[49m");
2671 else if (tc->bg != 0)
2672 tty_putcode_i(tty, TTYC_SETAB, 0);
2673 tc->bg = gc->bg;
2674 }
2675 }
2676 }
2677
2678 /* Set the foreground colour. */
2679 if (!COLOUR_DEFAULT(gc->fg) && gc->fg != tc->fg)
2680 tty_colours_fg(tty, gc);
2681
2682 /*
2683 * Set the background colour. This must come after the foreground as
2684 * tty_colour_fg() can call tty_reset().
2685 */
2686 if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg)
2687 tty_colours_bg(tty, gc);
2688
2689 /* Set the underscore colour. */
2690 if (gc->us != tc->us)
2691 tty_colours_us(tty, gc);
2692 }
2693
2694 static void
2695 tty_check_fg(struct tty *tty, struct colour_palette *palette,
2696 struct grid_cell *gc)
2697 {
2698 u_char r, g, b;
2699 u_int colours;
2700 int c;
2701
2702 /*
2703 * Perform substitution if this pane has a palette. If the bright
2704 * attribute is set and Nobr is not present, use the bright entry in
2705 * the palette by changing to the aixterm colour
2706 */
2707 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2708 c = gc->fg;
2709 if (c < 8 &&
2710 gc->attr & GRID_ATTR_BRIGHT &&
2711 !tty_term_has(tty->term, TTYC_NOBR))
2712 c += 90;
2713 if ((c = colour_palette_get(palette, c)) != -1)
2714 gc->fg = c;
2715 }
2716
2717 /* Is this a 24-bit colour? */
2718 if (gc->fg & COLOUR_FLAG_RGB) {
2719 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2720 if (tty->term->flags & TERM_RGBCOLOURS)
2721 return;
2722 colour_split_rgb(gc->fg, &r, &g, &b);
2723 gc->fg = colour_find_rgb(r, g, b);
2724 }
2725
2726 /* How many colours does this terminal have? */
2727 if (tty->term->flags & TERM_256COLOURS)
2728 colours = 256;
2729 else
2730 colours = tty_term_number(tty->term, TTYC_COLORS);
2731
2732 /* Is this a 256-colour colour? */
2733 if (gc->fg & COLOUR_FLAG_256) {
2734 /* And not a 256 colour mode? */
2735 if (colours < 256) {
2736 gc->fg = colour_256to16(gc->fg);
2737 if (gc->fg & 8) {
2738 gc->fg &= 7;
2739 if (colours >= 16)
2740 gc->fg += 90;
2741 }
2742 }
2743 return;
2744 }
2745
2746 /* Is this an aixterm colour? */
2747 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
2748 gc->fg -= 90;
2749 gc->attr |= GRID_ATTR_BRIGHT;
2750 }
2751 }
2752
2753 static void
2754 tty_check_bg(struct tty *tty, struct colour_palette *palette,
2755 struct grid_cell *gc)
2756 {
2757 u_char r, g, b;
2758 u_int colours;
2759 int c;
2760
2761 /* Perform substitution if this pane has a palette. */
2762 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2763 if ((c = colour_palette_get(palette, gc->bg)) != -1)
2764 gc->bg = c;
2765 }
2766
2767 /* Is this a 24-bit colour? */
2768 if (gc->bg & COLOUR_FLAG_RGB) {
2769 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2770 if (tty->term->flags & TERM_RGBCOLOURS)
2771 return;
2772 colour_split_rgb(gc->bg, &r, &g, &b);
2773 gc->bg = colour_find_rgb(r, g, b);
2774 }
2775
2776 /* How many colours does this terminal have? */
2777 if (tty->term->flags & TERM_256COLOURS)
2778 colours = 256;
2779 else
2780 colours = tty_term_number(tty->term, TTYC_COLORS);
2781
2782 /* Is this a 256-colour colour? */
2783 if (gc->bg & COLOUR_FLAG_256) {
2784 /*
2785 * And not a 256 colour mode? Translate to 16-colour
2786 * palette. Bold background doesn't exist portably, so just
2787 * discard the bold bit if set.
2788 */
2789 if (colours < 256) {
2790 gc->bg = colour_256to16(gc->bg);
2791 if (gc->bg & 8) {
2792 gc->bg &= 7;
2793 if (colours >= 16)
2794 gc->bg += 90;
2795 }
2796 }
2797 return;
2798 }
2799
2800 /* Is this an aixterm colour? */
2801 if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
2802 gc->bg -= 90;
2803 }
2804
2805 static void
2806 tty_check_us(__unused struct tty *tty, struct colour_palette *palette,
2807 struct grid_cell *gc)
2808 {
2809 int c;
2810
2811 /* Perform substitution if this pane has a palette. */
2812 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2813 if ((c = colour_palette_get(palette, gc->us)) != -1)
2814 gc->us = c;
2815 }
2816
2817 /* Underscore colour is set as RGB so convert. */
2818 if ((c = colour_force_rgb (gc->us)) == -1)
2819 gc->us = 8;
2820 else
2821 gc->us = c;
2822 }
2823
2824 static void
2825 tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
2826 {
2827 struct grid_cell *tc = &tty->cell;
2828 char s[32];
2829
2830 /* Is this a 24-bit or 256-colour colour? */
2831 if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
2832 if (tty_try_colour(tty, gc->fg, "38") == 0)
2833 goto save;
2834 /* Should not get here, already converted in tty_check_fg. */
2835 return;
2836 }
2837
2838 /* Is this an aixterm bright colour? */
2839 if (gc->fg >= 90 && gc->fg <= 97) {
2840 if (tty->term->flags & TERM_256COLOURS) {
2841 xsnprintf(s, sizeof s, "\033[%dm", gc->fg);
2842 tty_puts(tty, s);
2843 } else
2844 tty_putcode_i(tty, TTYC_SETAF, gc->fg - 90 + 8);
2845 goto save;
2846 }
2847
2848 /* Otherwise set the foreground colour. */
2849 tty_putcode_i(tty, TTYC_SETAF, gc->fg);
2850
2851 save:
2852 /* Save the new values in the terminal current cell. */
2853 tc->fg = gc->fg;
2854 }
2855
2856 static void
2857 tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
2858 {
2859 struct grid_cell *tc = &tty->cell;
2860 char s[32];
2861
2862 /* Is this a 24-bit or 256-colour colour? */
2863 if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
2864 if (tty_try_colour(tty, gc->bg, "48") == 0)
2865 goto save;
2866 /* Should not get here, already converted in tty_check_bg. */
2867 return;
2868 }
2869
2870 /* Is this an aixterm bright colour? */
2871 if (gc->bg >= 90 && gc->bg <= 97) {
2872 if (tty->term->flags & TERM_256COLOURS) {
2873 xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10);
2874 tty_puts(tty, s);
2875 } else
2876 tty_putcode_i(tty, TTYC_SETAB, gc->bg - 90 + 8);
2877 goto save;
2878 }
2879
2880 /* Otherwise set the background colour. */
2881 tty_putcode_i(tty, TTYC_SETAB, gc->bg);
2882
2883 save:
2884 /* Save the new values in the terminal current cell. */
2885 tc->bg = gc->bg;
2886 }
2887
2888 static void
2889 tty_colours_us(struct tty *tty, const struct grid_cell *gc)
2890 {
2891 struct grid_cell *tc = &tty->cell;
2892 u_int c;
2893 u_char r, g, b;
2894
2895 /* Clear underline colour. */
2896 if (COLOUR_DEFAULT(gc->us)) {
2897 tty_putcode(tty, TTYC_OL);
2898 goto save;
2899 }
2900
2901 /* Must be an RGB colour - this should never happen. */
2902 if (~gc->us & COLOUR_FLAG_RGB)
2903 return;
2904
2905 /*
2906 * Setulc and setal follows the ncurses(3) one argument "direct colour"
2907 * capability format. Calculate the colour value.
2908 */
2909 colour_split_rgb(gc->us, &r, &g, &b);
2910 c = (65536 * r) + (256 * g) + b;
2911
2912 /*
2913 * Write the colour. Only use setal if the RGB flag is set because the
2914 * non-RGB version may be wrong.
2915 */
2916 if (tty_term_has(tty->term, TTYC_SETULC))
2917 tty_putcode_i(tty, TTYC_SETULC, c);
2918 else if (tty_term_has(tty->term, TTYC_SETAL) &&
2919 tty_term_has(tty->term, TTYC_RGB))
2920 tty_putcode_i(tty, TTYC_SETAL, c);
2921
2922 save:
2923 /* Save the new values in the terminal current cell. */
2924 tc->us = gc->us;
2925 }
2926
2927 static int
2928 tty_try_colour(struct tty *tty, int colour, const char *type)
2929 {
2930 u_char r, g, b;
2931
2932 if (colour & COLOUR_FLAG_256) {
2933 if (*type == '3' && tty_term_has(tty->term, TTYC_SETAF))
2934 tty_putcode_i(tty, TTYC_SETAF, colour & 0xff);
2935 else if (tty_term_has(tty->term, TTYC_SETAB))
2936 tty_putcode_i(tty, TTYC_SETAB, colour & 0xff);
2937 return (0);
2938 }
2939
2940 if (colour & COLOUR_FLAG_RGB) {
2941 colour_split_rgb(colour & 0xffffff, &r, &g, &b);
2942 if (*type == '3' && tty_term_has(tty->term, TTYC_SETRGBF))
2943 tty_putcode_iii(tty, TTYC_SETRGBF, r, g, b);
2944 else if (tty_term_has(tty->term, TTYC_SETRGBB))
2945 tty_putcode_iii(tty, TTYC_SETRGBB, r, g, b);
2946 return (0);
2947 }
2948
2949 return (-1);
2950 }
2951
2952 static void
2953 tty_window_default_style(struct grid_cell *gc, struct window_pane *wp)
2954 {
2955 memcpy(gc, &grid_default_cell, sizeof *gc);
2956 gc->fg = wp->palette.fg;
2957 gc->bg = wp->palette.bg;
2958 }
2959
2960 void
2961 tty_default_colours(struct grid_cell *gc, struct window_pane *wp)
2962 {
2963 struct options *oo = wp->options;
2964 struct format_tree *ft;
2965
2966 memcpy(gc, &grid_default_cell, sizeof *gc);
2967
2968 if (wp->flags & PANE_STYLECHANGED) {
2969 log_debug("%%%u: style changed", wp->id);
2970 wp->flags &= ~PANE_STYLECHANGED;
2971
2972 ft = format_create(NULL, NULL, FORMAT_PANE|wp->id,
2973 FORMAT_NOJOBS);
2974 format_defaults(ft, NULL, NULL, NULL, wp);
2975 tty_window_default_style(&wp->cached_active_gc, wp);
2976 style_add(&wp->cached_active_gc, oo, "window-active-style", ft);
2977 tty_window_default_style(&wp->cached_gc, wp);
2978 style_add(&wp->cached_gc, oo, "window-style", ft);
2979 format_free(ft);
2980 }
2981
2982 if (gc->fg == 8) {
2983 if (wp == wp->window->active && wp->cached_active_gc.fg != 8)
2984 gc->fg = wp->cached_active_gc.fg;
2985 else
2986 gc->fg = wp->cached_gc.fg;
2987 }
2988
2989 if (gc->bg == 8) {
2990 if (wp == wp->window->active && wp->cached_active_gc.bg != 8)
2991 gc->bg = wp->cached_active_gc.bg;
2992 else
2993 gc->bg = wp->cached_gc.bg;
2994 }
2995 }
2996
2997 static void
2998 tty_default_attributes(struct tty *tty, const struct grid_cell *defaults,
2999 struct colour_palette *palette, u_int bg, struct hyperlinks *hl)
3000 {
3001 struct grid_cell gc;
3002
3003 memcpy(&gc, &grid_default_cell, sizeof gc);
3004 gc.bg = bg;
3005 tty_attributes(tty, &gc, defaults, palette, hl);
3006 }
3007
3008 static void
3009 tty_clipboard_query_callback(__unused int fd, __unused short events, void *data)
3010 {
3011 struct tty *tty = data;
3012 struct client *c = tty->client;
3013
3014 c->flags &= ~CLIENT_CLIPBOARDBUFFER;
3015 free(c->clipboard_panes);
3016 c->clipboard_panes = NULL;
3017 c->clipboard_npanes = 0;
3018
3019 tty->flags &= ~TTY_OSC52QUERY;
3020 }
3021
3022 void
3023 tty_clipboard_query(struct tty *tty)
3024 {
3025 struct timeval tv = { .tv_sec = TTY_QUERY_TIMEOUT };
3026
3027 if ((~tty->flags & TTY_STARTED) || (tty->flags & TTY_OSC52QUERY))
3028 return;
3029 tty_putcode_ss(tty, TTYC_MS, "", "?");
3030
3031 tty->flags |= TTY_OSC52QUERY;
3032 evtimer_set(&tty->clipboard_timer, tty_clipboard_query_callback, tty);
3033 evtimer_add(&tty->clipboard_timer, &tv);
3034 }
tmux -- terminal multiplexer similar to GNU Screen