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Keep cursor on selected item on menu (useful for blind people), GitHub
[tmux.git] / tty.c
blob7e0a6a3eeb2427a86edeaa8cf2ec0e8549fbe293
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 int tty_client_ready(struct client *);
38
39 static void tty_set_italics(struct tty *);
40 static int tty_try_colour(struct tty *, int, const char *);
41 static void tty_force_cursor_colour(struct tty *, int);
42 static void tty_cursor_pane(struct tty *, const struct tty_ctx *, u_int,
43 u_int);
44 static void tty_cursor_pane_unless_wrap(struct tty *,
45 const struct tty_ctx *, u_int, u_int);
46 static void tty_invalidate(struct tty *);
47 static void tty_colours(struct tty *, const struct grid_cell *);
48 static void tty_check_fg(struct tty *, struct colour_palette *,
49 struct grid_cell *);
50 static void tty_check_bg(struct tty *, struct colour_palette *,
51 struct grid_cell *);
52 static void tty_check_us(struct tty *, struct colour_palette *,
53 struct grid_cell *);
54 static void tty_colours_fg(struct tty *, const struct grid_cell *);
55 static void tty_colours_bg(struct tty *, const struct grid_cell *);
56 static void tty_colours_us(struct tty *, const struct grid_cell *);
57
58 static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int,
59 u_int);
60 static void tty_region(struct tty *, u_int, u_int);
61 static void tty_margin_pane(struct tty *, const struct tty_ctx *);
62 static void tty_margin(struct tty *, u_int, u_int);
63 static int tty_large_region(struct tty *, const struct tty_ctx *);
64 static int tty_fake_bce(const struct tty *, const struct grid_cell *,
65 u_int);
66 static void tty_redraw_region(struct tty *, const struct tty_ctx *);
67 static void tty_emulate_repeat(struct tty *, enum tty_code_code,
68 enum tty_code_code, u_int);
69 static void tty_repeat_space(struct tty *, u_int);
70 static void tty_draw_pane(struct tty *, const struct tty_ctx *, u_int);
71 static void tty_default_attributes(struct tty *, const struct grid_cell *,
72 struct colour_palette *, u_int);
73 static int tty_check_overlay(struct tty *, u_int, u_int);
74 static void tty_check_overlay_range(struct tty *, u_int, u_int, u_int,
75 struct overlay_ranges *);
76
77 #define tty_use_margin(tty) \
78 (tty->term->flags & TERM_DECSLRM)
79 #define tty_full_width(tty, ctx) \
80 ((ctx)->xoff == 0 && (ctx)->sx >= (tty)->sx)
81
82 #define TTY_BLOCK_INTERVAL (100000 /* 100 milliseconds */)
83 #define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8)
84 #define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8)
85
86 #define TTY_QUERY_TIMEOUT 5
87
88 void
89 tty_create_log(void)
90 {
91 char name[64];
92
93 xsnprintf(name, sizeof name, "tmux-out-%ld.log", (long)getpid());
94
95 tty_log_fd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
96 if (tty_log_fd != -1 && fcntl(tty_log_fd, F_SETFD, FD_CLOEXEC) == -1)
97 fatal("fcntl failed");
98 }
99
100 int
101 tty_init(struct tty *tty, struct client *c)
102 {
103 if (!isatty(c->fd))
104 return (-1);
105
106 memset(tty, 0, sizeof *tty);
107 tty->client = c;
108
109 tty->cstyle = SCREEN_CURSOR_DEFAULT;
110 tty->ccolour = -1;
111
112 if (tcgetattr(c->fd, &tty->tio) != 0)
113 return (-1);
114 return (0);
115 }
116
117 void
118 tty_resize(struct tty *tty)
119 {
120 struct client *c = tty->client;
121 struct winsize ws;
122 u_int sx, sy, xpixel, ypixel;
123
124 if (ioctl(c->fd, TIOCGWINSZ, &ws) != -1) {
125 sx = ws.ws_col;
126 if (sx == 0) {
127 sx = 80;
128 xpixel = 0;
129 } else
130 xpixel = ws.ws_xpixel / sx;
131 sy = ws.ws_row;
132 if (sy == 0) {
133 sy = 24;
134 ypixel = 0;
135 } else
136 ypixel = ws.ws_ypixel / sy;
137 } else {
138 sx = 80;
139 sy = 24;
140 xpixel = 0;
141 ypixel = 0;
142 }
143 log_debug("%s: %s now %ux%u (%ux%u)", __func__, c->name, sx, sy,
144 xpixel, ypixel);
145 tty_set_size(tty, sx, sy, xpixel, ypixel);
146 tty_invalidate(tty);
147 }
148
149 void
150 tty_set_size(struct tty *tty, u_int sx, u_int sy, u_int xpixel, u_int ypixel)
151 {
152 tty->sx = sx;
153 tty->sy = sy;
154 tty->xpixel = xpixel;
155 tty->ypixel = ypixel;
156 }
157
158 static void
159 tty_read_callback(__unused int fd, __unused short events, void *data)
160 {
161 struct tty *tty = data;
162 struct client *c = tty->client;
163 const char *name = c->name;
164 size_t size = EVBUFFER_LENGTH(tty->in);
165 int nread;
166
167 nread = evbuffer_read(tty->in, c->fd, -1);
168 if (nread == 0 || nread == -1) {
169 if (nread == 0)
170 log_debug("%s: read closed", name);
171 else
172 log_debug("%s: read error: %s", name, strerror(errno));
173 event_del(&tty->event_in);
174 server_client_lost(tty->client);
175 return;
176 }
177 log_debug("%s: read %d bytes (already %zu)", name, nread, size);
178
179 while (tty_keys_next(tty))
180 ;
181 }
182
183 static void
184 tty_timer_callback(__unused int fd, __unused short events, void *data)
185 {
186 struct tty *tty = data;
187 struct client *c = tty->client;
188 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
189
190 log_debug("%s: %zu discarded", c->name, tty->discarded);
191
192 c->flags |= CLIENT_ALLREDRAWFLAGS;
193 c->discarded += tty->discarded;
194
195 if (tty->discarded < TTY_BLOCK_STOP(tty)) {
196 tty->flags &= ~TTY_BLOCK;
197 tty_invalidate(tty);
198 return;
199 }
200 tty->discarded = 0;
201 evtimer_add(&tty->timer, &tv);
202 }
203
204 static int
205 tty_block_maybe(struct tty *tty)
206 {
207 struct client *c = tty->client;
208 size_t size = EVBUFFER_LENGTH(tty->out);
209 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
210
211 if (size == 0)
212 tty->flags &= ~TTY_NOBLOCK;
213 else if (tty->flags & TTY_NOBLOCK)
214 return (0);
215
216 if (size < TTY_BLOCK_START(tty))
217 return (0);
218
219 if (tty->flags & TTY_BLOCK)
220 return (1);
221 tty->flags |= TTY_BLOCK;
222
223 log_debug("%s: can't keep up, %zu discarded", c->name, size);
224
225 evbuffer_drain(tty->out, size);
226 c->discarded += size;
227
228 tty->discarded = 0;
229 evtimer_add(&tty->timer, &tv);
230 return (1);
231 }
232
233 static void
234 tty_write_callback(__unused int fd, __unused short events, void *data)
235 {
236 struct tty *tty = data;
237 struct client *c = tty->client;
238 size_t size = EVBUFFER_LENGTH(tty->out);
239 int nwrite;
240
241 nwrite = evbuffer_write(tty->out, c->fd);
242 if (nwrite == -1)
243 return;
244 log_debug("%s: wrote %d bytes (of %zu)", c->name, nwrite, size);
245
246 if (c->redraw > 0) {
247 if ((size_t)nwrite >= c->redraw)
248 c->redraw = 0;
249 else
250 c->redraw -= nwrite;
251 log_debug("%s: waiting for redraw, %zu bytes left", c->name,
252 c->redraw);
253 } else if (tty_block_maybe(tty))
254 return;
255
256 if (EVBUFFER_LENGTH(tty->out) != 0)
257 event_add(&tty->event_out, NULL);
258 }
259
260 int
261 tty_open(struct tty *tty, char **cause)
262 {
263 struct client *c = tty->client;
264
265 tty->term = tty_term_create(tty, c->term_name, c->term_caps,
266 c->term_ncaps, &c->term_features, cause);
267 if (tty->term == NULL) {
268 tty_close(tty);
269 return (-1);
270 }
271 tty->flags |= TTY_OPENED;
272
273 tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_BLOCK|TTY_TIMER);
274
275 event_set(&tty->event_in, c->fd, EV_PERSIST|EV_READ,
276 tty_read_callback, tty);
277 tty->in = evbuffer_new();
278 if (tty->in == NULL)
279 fatal("out of memory");
280
281 event_set(&tty->event_out, c->fd, EV_WRITE, tty_write_callback, tty);
282 tty->out = evbuffer_new();
283 if (tty->out == NULL)
284 fatal("out of memory");
285
286 evtimer_set(&tty->timer, tty_timer_callback, tty);
287
288 tty_start_tty(tty);
289
290 tty_keys_build(tty);
291
292 return (0);
293 }
294
295 static void
296 tty_start_timer_callback(__unused int fd, __unused short events, void *data)
297 {
298 struct tty *tty = data;
299 struct client *c = tty->client;
300
301 log_debug("%s: start timer fired", c->name);
302 if ((tty->flags & (TTY_HAVEDA|TTY_HAVEXDA)) == 0)
303 tty_update_features(tty);
304 tty->flags |= (TTY_HAVEDA|TTY_HAVEXDA);
305 }
306
307 void
308 tty_start_tty(struct tty *tty)
309 {
310 struct client *c = tty->client;
311 struct termios tio;
312 struct timeval tv = { .tv_sec = TTY_QUERY_TIMEOUT };
313
314 setblocking(c->fd, 0);
315 event_add(&tty->event_in, NULL);
316
317 memcpy(&tio, &tty->tio, sizeof tio);
318 tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP);
319 tio.c_iflag |= IGNBRK;
320 tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET);
321 tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL|ECHOPRT|
322 ECHOKE|ISIG);
323 tio.c_cc[VMIN] = 1;
324 tio.c_cc[VTIME] = 0;
325 if (tcsetattr(c->fd, TCSANOW, &tio) == 0)
326 tcflush(c->fd, TCOFLUSH);
327
328 tty_putcode(tty, TTYC_SMCUP);
329
330 tty_putcode(tty, TTYC_SMKX);
331 tty_putcode(tty, TTYC_CLEAR);
332
333 if (tty_acs_needed(tty)) {
334 log_debug("%s: using capabilities for ACS", c->name);
335 tty_putcode(tty, TTYC_ENACS);
336 } else
337 log_debug("%s: using UTF-8 for ACS", c->name);
338
339 tty_putcode(tty, TTYC_CNORM);
340 if (tty_term_has(tty->term, TTYC_KMOUS)) {
341 tty_puts(tty, "\033[?1000l\033[?1002l\033[?1003l");
342 tty_puts(tty, "\033[?1006l\033[?1005l");
343 }
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->flags & TTY_HAVEDA)
367 tty_puts(tty, "\033[>c");
368 if (~tty->flags & TTY_HAVEXDA)
369 tty_puts(tty, "\033[>q");
370 } else
371 tty->flags |= (TTY_HAVEDA|TTY_HAVEXDA);
372 }
373
374 void
375 tty_stop_tty(struct tty *tty)
376 {
377 struct client *c = tty->client;
378 struct winsize ws;
379
380 if (!(tty->flags & TTY_STARTED))
381 return;
382 tty->flags &= ~TTY_STARTED;
383
384 evtimer_del(&tty->start_timer);
385
386 event_del(&tty->timer);
387 tty->flags &= ~TTY_BLOCK;
388
389 event_del(&tty->event_in);
390 event_del(&tty->event_out);
391
392 /*
393 * Be flexible about error handling and try not kill the server just
394 * because the fd is invalid. Things like ssh -t can easily leave us
395 * with a dead tty.
396 */
397 if (ioctl(c->fd, TIOCGWINSZ, &ws) == -1)
398 return;
399 if (tcsetattr(c->fd, TCSANOW, &tty->tio) == -1)
400 return;
401
402 tty_raw(tty, tty_term_string2(tty->term, TTYC_CSR, 0, ws.ws_row - 1));
403 if (tty_acs_needed(tty))
404 tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
405 tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
406 tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
407 tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
408 if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
409 if (tty_term_has(tty->term, TTYC_SE))
410 tty_raw(tty, tty_term_string(tty->term, TTYC_SE));
411 else if (tty_term_has(tty->term, TTYC_SS))
412 tty_raw(tty, tty_term_string1(tty->term, TTYC_SS, 0));
413 }
414 if (tty->mode & MODE_BRACKETPASTE)
415 tty_raw(tty, tty_term_string(tty->term, TTYC_DSBP));
416 if (tty->ccolour != -1)
417 tty_raw(tty, tty_term_string(tty->term, TTYC_CR));
418
419 tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
420 if (tty_term_has(tty->term, TTYC_KMOUS)) {
421 tty_raw(tty, "\033[?1000l\033[?1002l\033[?1003l");
422 tty_raw(tty, "\033[?1006l\033[?1005l");
423 }
424
425 if (tty->term->flags & TERM_VT100LIKE)
426 tty_raw(tty, "\033[?7727l");
427 tty_raw(tty, tty_term_string(tty->term, TTYC_DSFCS));
428 tty_raw(tty, tty_term_string(tty->term, TTYC_DSEKS));
429
430 if (tty_use_margin(tty))
431 tty_raw(tty, tty_term_string(tty->term, TTYC_DSMG));
432 tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
433
434 setblocking(c->fd, 1);
435 }
436
437 void
438 tty_close(struct tty *tty)
439 {
440 if (event_initialized(&tty->key_timer))
441 evtimer_del(&tty->key_timer);
442 tty_stop_tty(tty);
443
444 if (tty->flags & TTY_OPENED) {
445 evbuffer_free(tty->in);
446 event_del(&tty->event_in);
447 evbuffer_free(tty->out);
448 event_del(&tty->event_out);
449
450 tty_term_free(tty->term);
451 tty_keys_free(tty);
452
453 tty->flags &= ~TTY_OPENED;
454 }
455 }
456
457 void
458 tty_free(struct tty *tty)
459 {
460 tty_close(tty);
461 }
462
463 void
464 tty_update_features(struct tty *tty)
465 {
466 struct client *c = tty->client;
467
468 if (tty_apply_features(tty->term, c->term_features))
469 tty_term_apply_overrides(tty->term);
470
471 if (tty_use_margin(tty))
472 tty_putcode(tty, TTYC_ENMG);
473 if (options_get_number(global_options, "extended-keys"))
474 tty_puts(tty, tty_term_string(tty->term, TTYC_ENEKS));
475 if (options_get_number(global_options, "focus-events"))
476 tty_puts(tty, tty_term_string(tty->term, TTYC_ENFCS));
477 if (tty->term->flags & TERM_VT100LIKE)
478 tty_puts(tty, "\033[?7727h");
479 }
480
481 void
482 tty_raw(struct tty *tty, const char *s)
483 {
484 struct client *c = tty->client;
485 ssize_t n, slen;
486 u_int i;
487
488 slen = strlen(s);
489 for (i = 0; i < 5; i++) {
490 n = write(c->fd, s, slen);
491 if (n >= 0) {
492 s += n;
493 slen -= n;
494 if (slen == 0)
495 break;
496 } else if (n == -1 && errno != EAGAIN)
497 break;
498 usleep(100);
499 }
500 }
501
502 void
503 tty_putcode(struct tty *tty, enum tty_code_code code)
504 {
505 tty_puts(tty, tty_term_string(tty->term, code));
506 }
507
508 void
509 tty_putcode1(struct tty *tty, enum tty_code_code code, int a)
510 {
511 if (a < 0)
512 return;
513 tty_puts(tty, tty_term_string1(tty->term, code, a));
514 }
515
516 void
517 tty_putcode2(struct tty *tty, enum tty_code_code code, int a, int b)
518 {
519 if (a < 0 || b < 0)
520 return;
521 tty_puts(tty, tty_term_string2(tty->term, code, a, b));
522 }
523
524 void
525 tty_putcode3(struct tty *tty, enum tty_code_code code, int a, int b, int c)
526 {
527 if (a < 0 || b < 0 || c < 0)
528 return;
529 tty_puts(tty, tty_term_string3(tty->term, code, a, b, c));
530 }
531
532 void
533 tty_putcode_ptr1(struct tty *tty, enum tty_code_code code, const void *a)
534 {
535 if (a != NULL)
536 tty_puts(tty, tty_term_ptr1(tty->term, code, a));
537 }
538
539 void
540 tty_putcode_ptr2(struct tty *tty, enum tty_code_code code, const void *a,
541 const void *b)
542 {
543 if (a != NULL && b != NULL)
544 tty_puts(tty, tty_term_ptr2(tty->term, code, a, b));
545 }
546
547 static void
548 tty_add(struct tty *tty, const char *buf, size_t len)
549 {
550 struct client *c = tty->client;
551
552 if (tty->flags & TTY_BLOCK) {
553 tty->discarded += len;
554 return;
555 }
556
557 evbuffer_add(tty->out, buf, len);
558 log_debug("%s: %.*s", c->name, (int)len, buf);
559 c->written += len;
560
561 if (tty_log_fd != -1)
562 write(tty_log_fd, buf, len);
563 if (tty->flags & TTY_STARTED)
564 event_add(&tty->event_out, NULL);
565 }
566
567 void
568 tty_puts(struct tty *tty, const char *s)
569 {
570 if (*s != '\0')
571 tty_add(tty, s, strlen(s));
572 }
573
574 void
575 tty_putc(struct tty *tty, u_char ch)
576 {
577 const char *acs;
578
579 if ((tty->term->flags & TERM_NOAM) &&
580 ch >= 0x20 && ch != 0x7f &&
581 tty->cy == tty->sy - 1 &&
582 tty->cx + 1 >= tty->sx)
583 return;
584
585 if (tty->cell.attr & GRID_ATTR_CHARSET) {
586 acs = tty_acs_get(tty, ch);
587 if (acs != NULL)
588 tty_add(tty, acs, strlen(acs));
589 else
590 tty_add(tty, &ch, 1);
591 } else
592 tty_add(tty, &ch, 1);
593
594 if (ch >= 0x20 && ch != 0x7f) {
595 if (tty->cx >= tty->sx) {
596 tty->cx = 1;
597 if (tty->cy != tty->rlower)
598 tty->cy++;
599
600 /*
601 * On !am terminals, force the cursor position to where
602 * we think it should be after a line wrap - this means
603 * it works on sensible terminals as well.
604 */
605 if (tty->term->flags & TERM_NOAM)
606 tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx);
607 } else
608 tty->cx++;
609 }
610 }
611
612 void
613 tty_putn(struct tty *tty, const void *buf, size_t len, u_int width)
614 {
615 if ((tty->term->flags & TERM_NOAM) &&
616 tty->cy == tty->sy - 1 &&
617 tty->cx + len >= tty->sx)
618 len = tty->sx - tty->cx - 1;
619
620 tty_add(tty, buf, len);
621 if (tty->cx + width > tty->sx) {
622 tty->cx = (tty->cx + width) - tty->sx;
623 if (tty->cx <= tty->sx)
624 tty->cy++;
625 else
626 tty->cx = tty->cy = UINT_MAX;
627 } else
628 tty->cx += width;
629 }
630
631 static void
632 tty_set_italics(struct tty *tty)
633 {
634 const char *s;
635
636 if (tty_term_has(tty->term, TTYC_SITM)) {
637 s = options_get_string(global_options, "default-terminal");
638 if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) {
639 tty_putcode(tty, TTYC_SITM);
640 return;
641 }
642 }
643 tty_putcode(tty, TTYC_SMSO);
644 }
645
646 void
647 tty_set_title(struct tty *tty, const char *title)
648 {
649 if (!tty_term_has(tty->term, TTYC_TSL) ||
650 !tty_term_has(tty->term, TTYC_FSL))
651 return;
652
653 tty_putcode(tty, TTYC_TSL);
654 tty_puts(tty, title);
655 tty_putcode(tty, TTYC_FSL);
656 }
657
658 void
659 tty_set_path(struct tty *tty, const char *title)
660 {
661 if (!tty_term_has(tty->term, TTYC_SWD) ||
662 !tty_term_has(tty->term, TTYC_FSL))
663 return;
664
665 tty_putcode(tty, TTYC_SWD);
666 tty_puts(tty, title);
667 tty_putcode(tty, TTYC_FSL);
668 }
669
670 static void
671 tty_force_cursor_colour(struct tty *tty, int c)
672 {
673 u_char r, g, b;
674 char s[13];
675
676 if (c != -1)
677 c = colour_force_rgb(c);
678 if (c == tty->ccolour)
679 return;
680 if (c == -1)
681 tty_putcode(tty, TTYC_CR);
682 else {
683 colour_split_rgb(c, &r, &g, &b);
684 xsnprintf(s, sizeof s, "rgb:%02hhx/%02hhx/%02hhx", r, g, b);
685 tty_putcode_ptr1(tty, TTYC_CS, s);
686 }
687 tty->ccolour = c;
688 }
689
690 static int
691 tty_update_cursor(struct tty *tty, int mode, struct screen *s)
692 {
693 enum screen_cursor_style cstyle;
694 int ccolour, changed, cmode = mode;
695
696 /* Set cursor colour if changed. */
697 if (s != NULL) {
698 ccolour = s->ccolour;
699 if (s->ccolour == -1)
700 ccolour = s->default_ccolour;
701 tty_force_cursor_colour(tty, ccolour);
702 }
703
704 /* If cursor is off, set as invisible. */
705 if (~cmode & MODE_CURSOR) {
706 if (tty->mode & MODE_CURSOR)
707 tty_putcode(tty, TTYC_CIVIS);
708 return (cmode);
709 }
710
711 /* Check if blinking or very visible flag changed or style changed. */
712 if (s == NULL)
713 cstyle = tty->cstyle;
714 else {
715 cstyle = s->cstyle;
716 if (cstyle == SCREEN_CURSOR_DEFAULT) {
717 if (~cmode & MODE_CURSOR_BLINKING_SET) {
718 if (s->default_mode & MODE_CURSOR_BLINKING)
719 cmode |= MODE_CURSOR_BLINKING;
720 else
721 cmode &= ~MODE_CURSOR_BLINKING;
722 }
723 cstyle = s->default_cstyle;
724 }
725 }
726
727 /* If nothing changed, do nothing. */
728 changed = cmode ^ tty->mode;
729 if ((changed & CURSOR_MODES) == 0 && cstyle == tty->cstyle)
730 return (cmode);
731
732 /*
733 * Set cursor style. If an explicit style has been set with DECSCUSR,
734 * set it if supported, otherwise send cvvis for blinking styles.
735 *
736 * If no style, has been set (SCREEN_CURSOR_DEFAULT), then send cvvis
737 * if either the blinking or very visible flags are set.
738 */
739 tty_putcode(tty, TTYC_CNORM);
740 switch (cstyle) {
741 case SCREEN_CURSOR_DEFAULT:
742 if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
743 if (tty_term_has(tty->term, TTYC_SE))
744 tty_putcode(tty, TTYC_SE);
745 else
746 tty_putcode1(tty, TTYC_SS, 0);
747 }
748 if (cmode & (MODE_CURSOR_BLINKING|MODE_CURSOR_VERY_VISIBLE))
749 tty_putcode(tty, TTYC_CVVIS);
750 break;
751 case SCREEN_CURSOR_BLOCK:
752 if (tty_term_has(tty->term, TTYC_SS)) {
753 if (cmode & MODE_CURSOR_BLINKING)
754 tty_putcode1(tty, TTYC_SS, 1);
755 else
756 tty_putcode1(tty, TTYC_SS, 2);
757 } else if (cmode & MODE_CURSOR_BLINKING)
758 tty_putcode(tty, TTYC_CVVIS);
759 break;
760 case SCREEN_CURSOR_UNDERLINE:
761 if (tty_term_has(tty->term, TTYC_SS)) {
762 if (cmode & MODE_CURSOR_BLINKING)
763 tty_putcode1(tty, TTYC_SS, 3);
764 else
765 tty_putcode1(tty, TTYC_SS, 4);
766 } else if (cmode & MODE_CURSOR_BLINKING)
767 tty_putcode(tty, TTYC_CVVIS);
768 break;
769 case SCREEN_CURSOR_BAR:
770 if (tty_term_has(tty->term, TTYC_SS)) {
771 if (cmode & MODE_CURSOR_BLINKING)
772 tty_putcode1(tty, TTYC_SS, 5);
773 else
774 tty_putcode1(tty, TTYC_SS, 6);
775 } else if (cmode & MODE_CURSOR_BLINKING)
776 tty_putcode(tty, TTYC_CVVIS);
777 break;
778 }
779 tty->cstyle = cstyle;
780 return (cmode);
781 }
782
783 void
784 tty_update_mode(struct tty *tty, int mode, struct screen *s)
785 {
786 struct tty_term *term = tty->term;
787 struct client *c = tty->client;
788 int changed;
789
790 if (tty->flags & TTY_NOCURSOR)
791 mode &= ~MODE_CURSOR;
792
793 if (tty_update_cursor(tty, mode, s) & MODE_CURSOR_BLINKING)
794 mode |= MODE_CURSOR_BLINKING;
795 else
796 mode &= ~MODE_CURSOR_BLINKING;
797
798 changed = mode ^ tty->mode;
799 if (log_get_level() != 0 && changed != 0) {
800 log_debug("%s: current mode %s", c->name,
801 screen_mode_to_string(tty->mode));
802 log_debug("%s: setting mode %s", c->name,
803 screen_mode_to_string(mode));
804 }
805
806 if ((changed & ALL_MOUSE_MODES) && tty_term_has(term, TTYC_KMOUS)) {
807 /*
808 * If the mouse modes have changed, clear then all and apply
809 * again. There are differences in how terminals track the
810 * various bits.
811 */
812 tty_puts(tty, "\033[?1006l\033[?1000l\033[?1002l\033[?1003l");
813 if (mode & ALL_MOUSE_MODES)
814 tty_puts(tty, "\033[?1006h");
815 if (mode & MODE_MOUSE_ALL)
816 tty_puts(tty, "\033[?1000h\033[?1002h\033[?1003h");
817 else if (mode & MODE_MOUSE_BUTTON)
818 tty_puts(tty, "\033[?1000h\033[?1002h");
819 else if (mode & MODE_MOUSE_STANDARD)
820 tty_puts(tty, "\033[?1000h");
821 }
822 if (changed & MODE_BRACKETPASTE) {
823 if (mode & MODE_BRACKETPASTE)
824 tty_putcode(tty, TTYC_ENBP);
825 else
826 tty_putcode(tty, TTYC_DSBP);
827 }
828 tty->mode = mode;
829 }
830
831 static void
832 tty_emulate_repeat(struct tty *tty, enum tty_code_code code,
833 enum tty_code_code code1, u_int n)
834 {
835 if (tty_term_has(tty->term, code))
836 tty_putcode1(tty, code, n);
837 else {
838 while (n-- > 0)
839 tty_putcode(tty, code1);
840 }
841 }
842
843 static void
844 tty_repeat_space(struct tty *tty, u_int n)
845 {
846 static char s[500];
847
848 if (*s != ' ')
849 memset(s, ' ', sizeof s);
850
851 while (n > sizeof s) {
852 tty_putn(tty, s, sizeof s, sizeof s);
853 n -= sizeof s;
854 }
855 if (n != 0)
856 tty_putn(tty, s, n, n);
857 }
858
859 /* Is this window bigger than the terminal? */
860 int
861 tty_window_bigger(struct tty *tty)
862 {
863 struct client *c = tty->client;
864 struct window *w = c->session->curw->window;
865
866 return (tty->sx < w->sx || tty->sy - status_line_size(c) < w->sy);
867 }
868
869 /* What offset should this window be drawn at? */
870 int
871 tty_window_offset(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
872 {
873 *ox = tty->oox;
874 *oy = tty->ooy;
875 *sx = tty->osx;
876 *sy = tty->osy;
877
878 return (tty->oflag);
879 }
880
881 /* What offset should this window be drawn at? */
882 static int
883 tty_window_offset1(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
884 {
885 struct client *c = tty->client;
886 struct window *w = c->session->curw->window;
887 struct window_pane *wp = server_client_get_pane(c);
888 u_int cx, cy, lines;
889
890 lines = status_line_size(c);
891
892 if (tty->sx >= w->sx && tty->sy - lines >= w->sy) {
893 *ox = 0;
894 *oy = 0;
895 *sx = w->sx;
896 *sy = w->sy;
897
898 c->pan_window = NULL;
899 return (0);
900 }
901
902 *sx = tty->sx;
903 *sy = tty->sy - lines;
904
905 if (c->pan_window == w) {
906 if (*sx >= w->sx)
907 c->pan_ox = 0;
908 else if (c->pan_ox + *sx > w->sx)
909 c->pan_ox = w->sx - *sx;
910 *ox = c->pan_ox;
911 if (*sy >= w->sy)
912 c->pan_oy = 0;
913 else if (c->pan_oy + *sy > w->sy)
914 c->pan_oy = w->sy - *sy;
915 *oy = c->pan_oy;
916 return (1);
917 }
918
919 if (~wp->screen->mode & MODE_CURSOR) {
920 *ox = 0;
921 *oy = 0;
922 } else {
923 cx = wp->xoff + wp->screen->cx;
924 cy = wp->yoff + wp->screen->cy;
925
926 if (cx < *sx)
927 *ox = 0;
928 else if (cx > w->sx - *sx)
929 *ox = w->sx - *sx;
930 else
931 *ox = cx - *sx / 2;
932
933 if (cy < *sy)
934 *oy = 0;
935 else if (cy > w->sy - *sy)
936 *oy = w->sy - *sy;
937 else
938 *oy = cy - *sy / 2;
939 }
940
941 c->pan_window = NULL;
942 return (1);
943 }
944
945 /* Update stored offsets for a window and redraw if necessary. */
946 void
947 tty_update_window_offset(struct window *w)
948 {
949 struct client *c;
950
951 TAILQ_FOREACH(c, &clients, entry) {
952 if (c->session != NULL &&
953 c->session->curw != NULL &&
954 c->session->curw->window == w)
955 tty_update_client_offset(c);
956 }
957 }
958
959 /* Update stored offsets for a client and redraw if necessary. */
960 void
961 tty_update_client_offset(struct client *c)
962 {
963 u_int ox, oy, sx, sy;
964
965 if (~c->flags & CLIENT_TERMINAL)
966 return;
967
968 c->tty.oflag = tty_window_offset1(&c->tty, &ox, &oy, &sx, &sy);
969 if (ox == c->tty.oox &&
970 oy == c->tty.ooy &&
971 sx == c->tty.osx &&
972 sy == c->tty.osy)
973 return;
974
975 log_debug ("%s: %s offset has changed (%u,%u %ux%u -> %u,%u %ux%u)",
976 __func__, c->name, c->tty.oox, c->tty.ooy, c->tty.osx, c->tty.osy,
977 ox, oy, sx, sy);
978
979 c->tty.oox = ox;
980 c->tty.ooy = oy;
981 c->tty.osx = sx;
982 c->tty.osy = sy;
983
984 c->flags |= (CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS);
985 }
986
987 /*
988 * Is the region large enough to be worth redrawing once later rather than
989 * probably several times now? Currently yes if it is more than 50% of the
990 * pane.
991 */
992 static int
993 tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx)
994 {
995 return (ctx->orlower - ctx->orupper >= ctx->sy / 2);
996 }
997
998 /*
999 * Return if BCE is needed but the terminal doesn't have it - it'll need to be
1000 * emulated.
1001 */
1002 static int
1003 tty_fake_bce(const struct tty *tty, const struct grid_cell *gc, u_int bg)
1004 {
1005 if (tty_term_flag(tty->term, TTYC_BCE))
1006 return (0);
1007 if (!COLOUR_DEFAULT(bg) || !COLOUR_DEFAULT(gc->bg))
1008 return (1);
1009 return (0);
1010 }
1011
1012 /*
1013 * Redraw scroll region using data from screen (already updated). Used when
1014 * CSR not supported, or window is a pane that doesn't take up the full
1015 * width of the terminal.
1016 */
1017 static void
1018 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
1019 {
1020 struct client *c = tty->client;
1021 u_int i;
1022
1023 /*
1024 * If region is large, schedule a redraw. In most cases this is likely
1025 * to be followed by some more scrolling.
1026 */
1027 if (tty_large_region(tty, ctx)) {
1028 log_debug("%s: %s large redraw", __func__, c->name);
1029 ctx->redraw_cb(ctx);
1030 return;
1031 }
1032
1033 for (i = ctx->orupper; i <= ctx->orlower; i++)
1034 tty_draw_pane(tty, ctx, i);
1035 }
1036
1037 /* Is this position visible in the pane? */
1038 static int
1039 tty_is_visible(__unused struct tty *tty, const struct tty_ctx *ctx, u_int px,
1040 u_int py, u_int nx, u_int ny)
1041 {
1042 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1043
1044 if (!ctx->bigger)
1045 return (1);
1046
1047 if (xoff + nx <= ctx->wox || xoff >= ctx->wox + ctx->wsx ||
1048 yoff + ny <= ctx->woy || yoff >= ctx->woy + ctx->wsy)
1049 return (0);
1050 return (1);
1051 }
1052
1053 /* Clamp line position to visible part of pane. */
1054 static int
1055 tty_clamp_line(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1056 u_int nx, u_int *i, u_int *x, u_int *rx, u_int *ry)
1057 {
1058 u_int xoff = ctx->rxoff + px;
1059
1060 if (!tty_is_visible(tty, ctx, px, py, nx, 1))
1061 return (0);
1062 *ry = ctx->yoff + py - ctx->woy;
1063
1064 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1065 /* All visible. */
1066 *i = 0;
1067 *x = ctx->xoff + px - ctx->wox;
1068 *rx = nx;
1069 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1070 /* Both left and right not visible. */
1071 *i = ctx->wox;
1072 *x = 0;
1073 *rx = ctx->wsx;
1074 } else if (xoff < ctx->wox) {
1075 /* Left not visible. */
1076 *i = ctx->wox - (ctx->xoff + px);
1077 *x = 0;
1078 *rx = nx - *i;
1079 } else {
1080 /* Right not visible. */
1081 *i = 0;
1082 *x = (ctx->xoff + px) - ctx->wox;
1083 *rx = ctx->wsx - *x;
1084 }
1085 if (*rx > nx)
1086 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1087
1088 return (1);
1089 }
1090
1091 /* Clear a line. */
1092 static void
1093 tty_clear_line(struct tty *tty, const struct grid_cell *defaults, u_int py,
1094 u_int px, u_int nx, u_int bg)
1095 {
1096 struct client *c = tty->client;
1097 struct overlay_ranges r;
1098 u_int i;
1099
1100 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1101
1102 /* Nothing to clear. */
1103 if (nx == 0)
1104 return;
1105
1106 /* If genuine BCE is available, can try escape sequences. */
1107 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1108 /* Off the end of the line, use EL if available. */
1109 if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) {
1110 tty_cursor(tty, px, py);
1111 tty_putcode(tty, TTYC_EL);
1112 return;
1113 }
1114
1115 /* At the start of the line. Use EL1. */
1116 if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) {
1117 tty_cursor(tty, px + nx - 1, py);
1118 tty_putcode(tty, TTYC_EL1);
1119 return;
1120 }
1121
1122 /* Section of line. Use ECH if possible. */
1123 if (tty_term_has(tty->term, TTYC_ECH)) {
1124 tty_cursor(tty, px, py);
1125 tty_putcode1(tty, TTYC_ECH, nx);
1126 return;
1127 }
1128 }
1129
1130 /*
1131 * Couldn't use an escape sequence, use spaces. Clear only the visible
1132 * bit if there is an overlay.
1133 */
1134 tty_check_overlay_range(tty, px, py, nx, &r);
1135 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
1136 if (r.nx[i] == 0)
1137 continue;
1138 tty_cursor(tty, r.px[i], py);
1139 tty_repeat_space(tty, r.nx[i]);
1140 }
1141 }
1142
1143 /* Clear a line, adjusting to visible part of pane. */
1144 static void
1145 tty_clear_pane_line(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1146 u_int px, u_int nx, u_int bg)
1147 {
1148 struct client *c = tty->client;
1149 u_int i, x, rx, ry;
1150
1151 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1152
1153 if (tty_clamp_line(tty, ctx, px, py, nx, &i, &x, &rx, &ry))
1154 tty_clear_line(tty, &ctx->defaults, ry, x, rx, bg);
1155 }
1156
1157 /* Clamp area position to visible part of pane. */
1158 static int
1159 tty_clamp_area(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1160 u_int nx, u_int ny, u_int *i, u_int *j, u_int *x, u_int *y, u_int *rx,
1161 u_int *ry)
1162 {
1163 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1164
1165 if (!tty_is_visible(tty, ctx, px, py, nx, ny))
1166 return (0);
1167
1168 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1169 /* All visible. */
1170 *i = 0;
1171 *x = ctx->xoff + px - ctx->wox;
1172 *rx = nx;
1173 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1174 /* Both left and right not visible. */
1175 *i = ctx->wox;
1176 *x = 0;
1177 *rx = ctx->wsx;
1178 } else if (xoff < ctx->wox) {
1179 /* Left not visible. */
1180 *i = ctx->wox - (ctx->xoff + px);
1181 *x = 0;
1182 *rx = nx - *i;
1183 } else {
1184 /* Right not visible. */
1185 *i = 0;
1186 *x = (ctx->xoff + px) - ctx->wox;
1187 *rx = ctx->wsx - *x;
1188 }
1189 if (*rx > nx)
1190 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1191
1192 if (yoff >= ctx->woy && yoff + ny <= ctx->woy + ctx->wsy) {
1193 /* All visible. */
1194 *j = 0;
1195 *y = ctx->yoff + py - ctx->woy;
1196 *ry = ny;
1197 } else if (yoff < ctx->woy && yoff + ny > ctx->woy + ctx->wsy) {
1198 /* Both top and bottom not visible. */
1199 *j = ctx->woy;
1200 *y = 0;
1201 *ry = ctx->wsy;
1202 } else if (yoff < ctx->woy) {
1203 /* Top not visible. */
1204 *j = ctx->woy - (ctx->yoff + py);
1205 *y = 0;
1206 *ry = ny - *j;
1207 } else {
1208 /* Bottom not visible. */
1209 *j = 0;
1210 *y = (ctx->yoff + py) - ctx->woy;
1211 *ry = ctx->wsy - *y;
1212 }
1213 if (*ry > ny)
1214 fatalx("%s: y too big, %u > %u", __func__, *ry, ny);
1215
1216 return (1);
1217 }
1218
1219 /* Clear an area, adjusting to visible part of pane. */
1220 static void
1221 tty_clear_area(struct tty *tty, const struct grid_cell *defaults, u_int py,
1222 u_int ny, u_int px, u_int nx, u_int bg)
1223 {
1224 struct client *c = tty->client;
1225 u_int yy;
1226 char tmp[64];
1227
1228 log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py);
1229
1230 /* Nothing to clear. */
1231 if (nx == 0 || ny == 0)
1232 return;
1233
1234 /* If genuine BCE is available, can try escape sequences. */
1235 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1236 /* Use ED if clearing off the bottom of the terminal. */
1237 if (px == 0 &&
1238 px + nx >= tty->sx &&
1239 py + ny >= tty->sy &&
1240 tty_term_has(tty->term, TTYC_ED)) {
1241 tty_cursor(tty, 0, py);
1242 tty_putcode(tty, TTYC_ED);
1243 return;
1244 }
1245
1246 /*
1247 * On VT420 compatible terminals we can use DECFRA if the
1248 * background colour isn't default (because it doesn't work
1249 * after SGR 0).
1250 */
1251 if ((tty->term->flags & TERM_DECFRA) && !COLOUR_DEFAULT(bg)) {
1252 xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
1253 py + 1, px + 1, py + ny, px + nx);
1254 tty_puts(tty, tmp);
1255 return;
1256 }
1257
1258 /* Full lines can be scrolled away to clear them. */
1259 if (px == 0 &&
1260 px + nx >= tty->sx &&
1261 ny > 2 &&
1262 tty_term_has(tty->term, TTYC_CSR) &&
1263 tty_term_has(tty->term, TTYC_INDN)) {
1264 tty_region(tty, py, py + ny - 1);
1265 tty_margin_off(tty);
1266 tty_putcode1(tty, TTYC_INDN, ny);
1267 return;
1268 }
1269
1270 /*
1271 * If margins are supported, can just scroll the area off to
1272 * clear it.
1273 */
1274 if (nx > 2 &&
1275 ny > 2 &&
1276 tty_term_has(tty->term, TTYC_CSR) &&
1277 tty_use_margin(tty) &&
1278 tty_term_has(tty->term, TTYC_INDN)) {
1279 tty_region(tty, py, py + ny - 1);
1280 tty_margin(tty, px, px + nx - 1);
1281 tty_putcode1(tty, TTYC_INDN, ny);
1282 return;
1283 }
1284 }
1285
1286 /* Couldn't use an escape sequence, loop over the lines. */
1287 for (yy = py; yy < py + ny; yy++)
1288 tty_clear_line(tty, defaults, yy, px, nx, bg);
1289 }
1290
1291 /* Clear an area in a pane. */
1292 static void
1293 tty_clear_pane_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1294 u_int ny, u_int px, u_int nx, u_int bg)
1295 {
1296 u_int i, j, x, y, rx, ry;
1297
1298 if (tty_clamp_area(tty, ctx, px, py, nx, ny, &i, &j, &x, &y, &rx, &ry))
1299 tty_clear_area(tty, &ctx->defaults, y, ry, x, rx, bg);
1300 }
1301
1302 static void
1303 tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
1304 {
1305 struct screen *s = ctx->s;
1306 u_int nx = ctx->sx, i, x, rx, ry;
1307
1308 log_debug("%s: %s %u %d", __func__, tty->client->name, py, ctx->bigger);
1309
1310 if (!ctx->bigger) {
1311 tty_draw_line(tty, s, 0, py, nx, ctx->xoff, ctx->yoff + py,
1312 &ctx->defaults, ctx->palette);
1313 return;
1314 }
1315 if (tty_clamp_line(tty, ctx, 0, py, nx, &i, &x, &rx, &ry)) {
1316 tty_draw_line(tty, s, i, py, rx, x, ry, &ctx->defaults,
1317 ctx->palette);
1318 }
1319 }
1320
1321 static const struct grid_cell *
1322 tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
1323 {
1324 static struct grid_cell new;
1325 int c;
1326
1327 /* Characters less than 0x7f are always fine, no matter what. */
1328 if (gc->data.size == 1 && *gc->data.data < 0x7f)
1329 return (gc);
1330
1331 /* UTF-8 terminal and a UTF-8 character - fine. */
1332 if (tty->client->flags & CLIENT_UTF8)
1333 return (gc);
1334 memcpy(&new, gc, sizeof new);
1335
1336 /* See if this can be mapped to an ACS character. */
1337 c = tty_acs_reverse_get(tty, gc->data.data, gc->data.size);
1338 if (c != -1) {
1339 utf8_set(&new.data, c);
1340 new.attr |= GRID_ATTR_CHARSET;
1341 return (&new);
1342 }
1343
1344 /* Replace by the right number of underscores. */
1345 new.data.size = gc->data.width;
1346 if (new.data.size > UTF8_SIZE)
1347 new.data.size = UTF8_SIZE;
1348 memset(new.data.data, '_', new.data.size);
1349 return (&new);
1350 }
1351
1352 /*
1353 * Check if a single character is obstructed by the overlay and return a
1354 * boolean.
1355 */
1356 static int
1357 tty_check_overlay(struct tty *tty, u_int px, u_int py)
1358 {
1359 struct overlay_ranges r;
1360
1361 /*
1362 * A unit width range will always return nx[2] == 0 from a check, even
1363 * with multiple overlays, so it's sufficient to check just the first
1364 * two entries.
1365 */
1366 tty_check_overlay_range(tty, px, py, 1, &r);
1367 if (r.nx[0] + r.nx[1] == 0)
1368 return (0);
1369 return (1);
1370 }
1371
1372 /* Return parts of the input range which are visible. */
1373 static void
1374 tty_check_overlay_range(struct tty *tty, u_int px, u_int py, u_int nx,
1375 struct overlay_ranges *r)
1376 {
1377 struct client *c = tty->client;
1378
1379 if (c->overlay_check == NULL) {
1380 r->px[0] = px;
1381 r->nx[0] = nx;
1382 r->px[1] = 0;
1383 r->nx[1] = 0;
1384 r->px[2] = 0;
1385 r->nx[2] = 0;
1386 return;
1387 }
1388
1389 c->overlay_check(c, c->overlay_data, px, py, nx, r);
1390 }
1391
1392 void
1393 tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
1394 u_int atx, u_int aty, const struct grid_cell *defaults,
1395 struct colour_palette *palette)
1396 {
1397 struct grid *gd = s->grid;
1398 struct grid_cell gc, last;
1399 const struct grid_cell *gcp;
1400 struct grid_line *gl;
1401 struct client *c = tty->client;
1402 struct overlay_ranges r;
1403 u_int i, j, ux, sx, width, hidden, eux, nxx;
1404 u_int cellsize;
1405 int flags, cleared = 0, wrapped = 0;
1406 char buf[512];
1407 size_t len;
1408
1409 log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__,
1410 px, py, nx, atx, aty);
1411 log_debug("%s: defaults: fg=%d, bg=%d", __func__, defaults->fg,
1412 defaults->bg);
1413
1414 /*
1415 * py is the line in the screen to draw.
1416 * px is the start x and nx is the width to draw.
1417 * atx,aty is the line on the terminal to draw it.
1418 */
1419
1420 flags = (tty->flags & TTY_NOCURSOR);
1421 tty->flags |= TTY_NOCURSOR;
1422 tty_update_mode(tty, tty->mode, s);
1423
1424 tty_region_off(tty);
1425 tty_margin_off(tty);
1426
1427 /*
1428 * Clamp the width to cellsize - note this is not cellused, because
1429 * there may be empty background cells after it (from BCE).
1430 */
1431 sx = screen_size_x(s);
1432 if (nx > sx)
1433 nx = sx;
1434 cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
1435 if (sx > cellsize)
1436 sx = cellsize;
1437 if (sx > tty->sx)
1438 sx = tty->sx;
1439 if (sx > nx)
1440 sx = nx;
1441 ux = 0;
1442
1443 if (py == 0)
1444 gl = NULL;
1445 else
1446 gl = grid_get_line(gd, gd->hsize + py - 1);
1447 if (gl == NULL ||
1448 (~gl->flags & GRID_LINE_WRAPPED) ||
1449 atx != 0 ||
1450 tty->cx < tty->sx ||
1451 nx < tty->sx) {
1452 if (nx < tty->sx &&
1453 atx == 0 &&
1454 px + sx != nx &&
1455 tty_term_has(tty->term, TTYC_EL1) &&
1456 !tty_fake_bce(tty, defaults, 8) &&
1457 c->overlay_check == NULL) {
1458 tty_default_attributes(tty, defaults, palette, 8);
1459 tty_cursor(tty, nx - 1, aty);
1460 tty_putcode(tty, TTYC_EL1);
1461 cleared = 1;
1462 }
1463 } else {
1464 log_debug("%s: wrapped line %u", __func__, aty);
1465 wrapped = 1;
1466 }
1467
1468 memcpy(&last, &grid_default_cell, sizeof last);
1469 len = 0;
1470 width = 0;
1471
1472 for (i = 0; i < sx; i++) {
1473 grid_view_get_cell(gd, px + i, py, &gc);
1474 gcp = tty_check_codeset(tty, &gc);
1475 if (len != 0 &&
1476 (!tty_check_overlay(tty, atx + ux + width, aty) ||
1477 (gcp->attr & GRID_ATTR_CHARSET) ||
1478 gcp->flags != last.flags ||
1479 gcp->attr != last.attr ||
1480 gcp->fg != last.fg ||
1481 gcp->bg != last.bg ||
1482 gcp->us != last.us ||
1483 ux + width + gcp->data.width > nx ||
1484 (sizeof buf) - len < gcp->data.size)) {
1485 tty_attributes(tty, &last, defaults, palette);
1486 if (last.flags & GRID_FLAG_CLEARED) {
1487 log_debug("%s: %zu cleared", __func__, len);
1488 tty_clear_line(tty, defaults, aty, atx + ux,
1489 width, last.bg);
1490 } else {
1491 if (!wrapped || atx != 0 || ux != 0)
1492 tty_cursor(tty, atx + ux, aty);
1493 tty_putn(tty, buf, len, width);
1494 }
1495 ux += width;
1496
1497 len = 0;
1498 width = 0;
1499 wrapped = 0;
1500 }
1501
1502 if (gcp->flags & GRID_FLAG_SELECTED)
1503 screen_select_cell(s, &last, gcp);
1504 else
1505 memcpy(&last, gcp, sizeof last);
1506
1507 tty_check_overlay_range(tty, atx + ux, aty, gcp->data.width,
1508 &r);
1509 hidden = 0;
1510 for (j = 0; j < OVERLAY_MAX_RANGES; j++)
1511 hidden += r.nx[j];
1512 hidden = gcp->data.width - hidden;
1513 if (hidden != 0 && hidden == gcp->data.width) {
1514 if (~gcp->flags & GRID_FLAG_PADDING)
1515 ux += gcp->data.width;
1516 } else if (hidden != 0 || ux + gcp->data.width > nx) {
1517 if (~gcp->flags & GRID_FLAG_PADDING) {
1518 tty_attributes(tty, &last, defaults, palette);
1519 for (j = 0; j < OVERLAY_MAX_RANGES; j++) {
1520 if (r.nx[j] == 0)
1521 continue;
1522 /* Effective width drawn so far. */
1523 eux = r.px[j] - atx;
1524 if (eux < nx) {
1525 tty_cursor(tty, r.px[j], aty);
1526 nxx = nx - eux;
1527 if (r.nx[j] > nxx)
1528 r.nx[j] = nxx;
1529 tty_repeat_space(tty, r.nx[j]);
1530 ux = eux + r.nx[j];
1531 }
1532 }
1533 }
1534 } else if (gcp->attr & GRID_ATTR_CHARSET) {
1535 tty_attributes(tty, &last, defaults, palette);
1536 tty_cursor(tty, atx + ux, aty);
1537 for (j = 0; j < gcp->data.size; j++)
1538 tty_putc(tty, gcp->data.data[j]);
1539 ux += gcp->data.width;
1540 } else if (~gcp->flags & GRID_FLAG_PADDING) {
1541 memcpy(buf + len, gcp->data.data, gcp->data.size);
1542 len += gcp->data.size;
1543 width += gcp->data.width;
1544 }
1545 }
1546 if (len != 0 && ((~last.flags & GRID_FLAG_CLEARED) || last.bg != 8)) {
1547 tty_attributes(tty, &last, defaults, palette);
1548 if (last.flags & GRID_FLAG_CLEARED) {
1549 log_debug("%s: %zu cleared (end)", __func__, len);
1550 tty_clear_line(tty, defaults, aty, atx + ux, width,
1551 last.bg);
1552 } else {
1553 if (!wrapped || atx != 0 || ux != 0)
1554 tty_cursor(tty, atx + ux, aty);
1555 tty_putn(tty, buf, len, width);
1556 }
1557 ux += width;
1558 }
1559
1560 if (!cleared && ux < nx) {
1561 log_debug("%s: %u to end of line (%zu cleared)", __func__,
1562 nx - ux, len);
1563 tty_default_attributes(tty, defaults, palette, 8);
1564 tty_clear_line(tty, defaults, aty, atx + ux, nx - ux, 8);
1565 }
1566
1567 tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags;
1568 tty_update_mode(tty, tty->mode, s);
1569 }
1570
1571 void
1572 tty_sync_start(struct tty *tty)
1573 {
1574 if (tty->flags & TTY_BLOCK)
1575 return;
1576 if (tty->flags & TTY_SYNCING)
1577 return;
1578 tty->flags |= TTY_SYNCING;
1579
1580 if (tty_term_has(tty->term, TTYC_SYNC)) {
1581 log_debug("%s sync start", tty->client->name);
1582 tty_putcode1(tty, TTYC_SYNC, 1);
1583 }
1584 }
1585
1586 void
1587 tty_sync_end(struct tty *tty)
1588 {
1589 if (tty->flags & TTY_BLOCK)
1590 return;
1591 if (~tty->flags & TTY_SYNCING)
1592 return;
1593 tty->flags &= ~TTY_SYNCING;
1594
1595 if (tty_term_has(tty->term, TTYC_SYNC)) {
1596 log_debug("%s sync end", tty->client->name);
1597 tty_putcode1(tty, TTYC_SYNC, 2);
1598 }
1599 }
1600
1601 static int
1602 tty_client_ready(struct client *c)
1603 {
1604 if (c->session == NULL || c->tty.term == NULL)
1605 return (0);
1606 if (c->flags & (CLIENT_REDRAWWINDOW|CLIENT_SUSPENDED))
1607 return (0);
1608 if (c->tty.flags & TTY_FREEZE)
1609 return (0);
1610 return (1);
1611 }
1612
1613 void
1614 tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
1615 struct tty_ctx *ctx)
1616 {
1617 struct client *c;
1618 int state;
1619
1620 if (ctx->set_client_cb == NULL)
1621 return;
1622 TAILQ_FOREACH(c, &clients, entry) {
1623 if (!tty_client_ready(c))
1624 continue;
1625 state = ctx->set_client_cb(ctx, c);
1626 if (state == -1)
1627 break;
1628 if (state == 0)
1629 continue;
1630 cmdfn(&c->tty, ctx);
1631 }
1632 }
1633
1634 void
1635 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
1636 {
1637 struct client *c = tty->client;
1638
1639 if (ctx->bigger ||
1640 !tty_full_width(tty, ctx) ||
1641 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1642 (!tty_term_has(tty->term, TTYC_ICH) &&
1643 !tty_term_has(tty->term, TTYC_ICH1)) ||
1644 c->overlay_check != NULL) {
1645 tty_draw_pane(tty, ctx, ctx->ocy);
1646 return;
1647 }
1648
1649 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1650
1651 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1652
1653 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
1654 }
1655
1656 void
1657 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
1658 {
1659 struct client *c = tty->client;
1660
1661 if (ctx->bigger ||
1662 !tty_full_width(tty, ctx) ||
1663 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1664 (!tty_term_has(tty->term, TTYC_DCH) &&
1665 !tty_term_has(tty->term, TTYC_DCH1)) ||
1666 c->overlay_check != NULL) {
1667 tty_draw_pane(tty, ctx, ctx->ocy);
1668 return;
1669 }
1670
1671 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1672
1673 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1674
1675 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
1676 }
1677
1678 void
1679 tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx)
1680 {
1681 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1682
1683 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, ctx->num, ctx->bg);
1684 }
1685
1686 void
1687 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
1688 {
1689 struct client *c = tty->client;
1690
1691 if (ctx->bigger ||
1692 !tty_full_width(tty, ctx) ||
1693 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1694 !tty_term_has(tty->term, TTYC_CSR) ||
1695 !tty_term_has(tty->term, TTYC_IL1) ||
1696 ctx->sx == 1 ||
1697 ctx->sy == 1 ||
1698 c->overlay_check != NULL) {
1699 tty_redraw_region(tty, ctx);
1700 return;
1701 }
1702
1703 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1704
1705 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1706 tty_margin_off(tty);
1707 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1708
1709 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
1710 tty->cx = tty->cy = UINT_MAX;
1711 }
1712
1713 void
1714 tty_cmd_deleteline(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_DL1) ||
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
1732 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1733 tty_margin_off(tty);
1734 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1735
1736 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
1737 tty->cx = tty->cy = UINT_MAX;
1738 }
1739
1740 void
1741 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
1742 {
1743 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1744
1745 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->sx, ctx->bg);
1746 }
1747
1748 void
1749 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
1750 {
1751 u_int nx = ctx->sx - ctx->ocx;
1752
1753 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1754
1755 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, nx, ctx->bg);
1756 }
1757
1758 void
1759 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
1760 {
1761 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1762
1763 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->ocx + 1, ctx->bg);
1764 }
1765
1766 void
1767 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
1768 {
1769 struct client *c = tty->client;
1770
1771 if (ctx->ocy != ctx->orupper)
1772 return;
1773
1774 if (ctx->bigger ||
1775 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1776 tty_fake_bce(tty, &ctx->defaults, 8) ||
1777 !tty_term_has(tty->term, TTYC_CSR) ||
1778 (!tty_term_has(tty->term, TTYC_RI) &&
1779 !tty_term_has(tty->term, TTYC_RIN)) ||
1780 ctx->sx == 1 ||
1781 ctx->sy == 1 ||
1782 c->overlay_check != NULL) {
1783 tty_redraw_region(tty, ctx);
1784 return;
1785 }
1786
1787 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1788
1789 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1790 tty_margin_pane(tty, ctx);
1791 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1792
1793 if (tty_term_has(tty->term, TTYC_RI))
1794 tty_putcode(tty, TTYC_RI);
1795 else
1796 tty_putcode1(tty, TTYC_RIN, 1);
1797 }
1798
1799 void
1800 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
1801 {
1802 struct client *c = tty->client;
1803
1804 if (ctx->ocy != ctx->orlower)
1805 return;
1806
1807 if (ctx->bigger ||
1808 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1809 tty_fake_bce(tty, &ctx->defaults, 8) ||
1810 !tty_term_has(tty->term, TTYC_CSR) ||
1811 ctx->sx == 1 ||
1812 ctx->sy == 1 ||
1813 c->overlay_check != NULL) {
1814 tty_redraw_region(tty, ctx);
1815 return;
1816 }
1817
1818 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1819
1820 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1821 tty_margin_pane(tty, ctx);
1822
1823 /*
1824 * If we want to wrap a pane while using margins, the cursor needs to
1825 * be exactly on the right of the region. If the cursor is entirely off
1826 * the edge - move it back to the right. Some terminals are funny about
1827 * this and insert extra spaces, so only use the right if margins are
1828 * enabled.
1829 */
1830 if (ctx->xoff + ctx->ocx > tty->rright) {
1831 if (!tty_use_margin(tty))
1832 tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
1833 else
1834 tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
1835 } else
1836 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1837
1838 tty_putc(tty, '\n');
1839 }
1840
1841 void
1842 tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
1843 {
1844 struct client *c = tty->client;
1845 u_int i;
1846
1847 if (ctx->bigger ||
1848 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1849 tty_fake_bce(tty, &ctx->defaults, 8) ||
1850 !tty_term_has(tty->term, TTYC_CSR) ||
1851 ctx->sx == 1 ||
1852 ctx->sy == 1 ||
1853 c->overlay_check != NULL) {
1854 tty_redraw_region(tty, ctx);
1855 return;
1856 }
1857
1858 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1859
1860 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1861 tty_margin_pane(tty, ctx);
1862
1863 if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
1864 if (!tty_use_margin(tty))
1865 tty_cursor(tty, 0, tty->rlower);
1866 else
1867 tty_cursor(tty, tty->rright, tty->rlower);
1868 for (i = 0; i < ctx->num; i++)
1869 tty_putc(tty, '\n');
1870 } else {
1871 if (tty->cy == UINT_MAX)
1872 tty_cursor(tty, 0, 0);
1873 else
1874 tty_cursor(tty, 0, tty->cy);
1875 tty_putcode1(tty, TTYC_INDN, ctx->num);
1876 }
1877 }
1878
1879 void
1880 tty_cmd_scrolldown(struct tty *tty, const struct tty_ctx *ctx)
1881 {
1882 u_int i;
1883 struct client *c = tty->client;
1884
1885 if (ctx->bigger ||
1886 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1887 tty_fake_bce(tty, &ctx->defaults, 8) ||
1888 !tty_term_has(tty->term, TTYC_CSR) ||
1889 (!tty_term_has(tty->term, TTYC_RI) &&
1890 !tty_term_has(tty->term, TTYC_RIN)) ||
1891 ctx->sx == 1 ||
1892 ctx->sy == 1 ||
1893 c->overlay_check != NULL) {
1894 tty_redraw_region(tty, ctx);
1895 return;
1896 }
1897
1898 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1899
1900 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1901 tty_margin_pane(tty, ctx);
1902 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1903
1904 if (tty_term_has(tty->term, TTYC_RIN))
1905 tty_putcode1(tty, TTYC_RIN, ctx->num);
1906 else {
1907 for (i = 0; i < ctx->num; i++)
1908 tty_putcode(tty, TTYC_RI);
1909 }
1910 }
1911
1912 void
1913 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
1914 {
1915 u_int px, py, nx, ny;
1916
1917 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1918
1919 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1920 tty_margin_off(tty);
1921
1922 px = 0;
1923 nx = ctx->sx;
1924 py = ctx->ocy + 1;
1925 ny = ctx->sy - ctx->ocy - 1;
1926
1927 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1928
1929 px = ctx->ocx;
1930 nx = ctx->sx - ctx->ocx;
1931 py = ctx->ocy;
1932
1933 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1934 }
1935
1936 void
1937 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
1938 {
1939 u_int px, py, nx, ny;
1940
1941 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1942
1943 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1944 tty_margin_off(tty);
1945
1946 px = 0;
1947 nx = ctx->sx;
1948 py = 0;
1949 ny = ctx->ocy;
1950
1951 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1952
1953 px = 0;
1954 nx = ctx->ocx + 1;
1955 py = ctx->ocy;
1956
1957 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1958 }
1959
1960 void
1961 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
1962 {
1963 u_int px, py, nx, ny;
1964
1965 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1966
1967 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1968 tty_margin_off(tty);
1969
1970 px = 0;
1971 nx = ctx->sx;
1972 py = 0;
1973 ny = ctx->sy;
1974
1975 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1976 }
1977
1978 void
1979 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
1980 {
1981 u_int i, j;
1982
1983 if (ctx->bigger) {
1984 ctx->redraw_cb(ctx);
1985 return;
1986 }
1987
1988 tty_attributes(tty, &grid_default_cell, &ctx->defaults, ctx->palette);
1989
1990 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1991 tty_margin_off(tty);
1992
1993 for (j = 0; j < ctx->sy; j++) {
1994 tty_cursor_pane(tty, ctx, 0, j);
1995 for (i = 0; i < ctx->sx; i++)
1996 tty_putc(tty, 'E');
1997 }
1998 }
1999
2000 void
2001 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
2002 {
2003 const struct grid_cell *gcp = ctx->cell;
2004 struct screen *s = ctx->s;
2005 struct overlay_ranges r;
2006 u_int px, py, i, vis = 0;
2007
2008 px = ctx->xoff + ctx->ocx - ctx->wox;
2009 py = ctx->yoff + ctx->ocy - ctx->woy;
2010 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, 1, 1) ||
2011 (gcp->data.width == 1 && !tty_check_overlay(tty, px, py)))
2012 return;
2013
2014 /* Handle partially obstructed wide characters. */
2015 if (gcp->data.width > 1) {
2016 tty_check_overlay_range(tty, px, py, gcp->data.width, &r);
2017 for (i = 0; i < OVERLAY_MAX_RANGES; i++)
2018 vis += r.nx[i];
2019 if (vis < gcp->data.width) {
2020 tty_draw_line(tty, s, s->cx, s->cy, gcp->data.width,
2021 px, py, &ctx->defaults, ctx->palette);
2022 return;
2023 }
2024 }
2025
2026 if (ctx->xoff + ctx->ocx - ctx->wox > tty->sx - 1 &&
2027 ctx->ocy == ctx->orlower &&
2028 tty_full_width(tty, ctx))
2029 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
2030
2031 tty_margin_off(tty);
2032 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2033
2034 tty_cell(tty, ctx->cell, &ctx->defaults, ctx->palette);
2035 }
2036
2037 void
2038 tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx)
2039 {
2040 struct overlay_ranges r;
2041 u_int i, px, py, cx;
2042 char *cp = ctx->ptr;
2043
2044 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, ctx->num, 1))
2045 return;
2046
2047 if (ctx->bigger &&
2048 (ctx->xoff + ctx->ocx < ctx->wox ||
2049 ctx->xoff + ctx->ocx + ctx->num > ctx->wox + ctx->wsx)) {
2050 if (!ctx->wrapped ||
2051 !tty_full_width(tty, ctx) ||
2052 (tty->term->flags & TERM_NOAM) ||
2053 ctx->xoff + ctx->ocx != 0 ||
2054 ctx->yoff + ctx->ocy != tty->cy + 1 ||
2055 tty->cx < tty->sx ||
2056 tty->cy == tty->rlower)
2057 tty_draw_pane(tty, ctx, ctx->ocy);
2058 else
2059 ctx->redraw_cb(ctx);
2060 return;
2061 }
2062
2063 tty_margin_off(tty);
2064 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2065 tty_attributes(tty, ctx->cell, &ctx->defaults, ctx->palette);
2066
2067 /* Get tty position from pane position for overlay check. */
2068 px = ctx->xoff + ctx->ocx - ctx->wox;
2069 py = ctx->yoff + ctx->ocy - ctx->woy;
2070
2071 tty_check_overlay_range(tty, px, py, ctx->num, &r);
2072 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
2073 if (r.nx[i] == 0)
2074 continue;
2075 /* Convert back to pane position for printing. */
2076 cx = r.px[i] - ctx->xoff + ctx->wox;
2077 tty_cursor_pane_unless_wrap(tty, ctx, cx, ctx->ocy);
2078 tty_putn(tty, cp + r.px[i] - px, r.nx[i], r.nx[i]);
2079 }
2080 }
2081
2082 void
2083 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
2084 {
2085 tty_set_selection(tty, ctx->ptr2, ctx->ptr, ctx->num);
2086 }
2087
2088 void
2089 tty_set_selection(struct tty *tty, const char *flags, const char *buf,
2090 size_t len)
2091 {
2092 char *encoded;
2093 size_t size;
2094
2095 if (~tty->flags & TTY_STARTED)
2096 return;
2097 if (!tty_term_has(tty->term, TTYC_MS))
2098 return;
2099
2100 size = 4 * ((len + 2) / 3) + 1; /* storage for base64 */
2101 encoded = xmalloc(size);
2102
2103 b64_ntop(buf, len, encoded, size);
2104 tty->flags |= TTY_NOBLOCK;
2105 tty_putcode_ptr2(tty, TTYC_MS, flags, encoded);
2106
2107 free(encoded);
2108 }
2109
2110 void
2111 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
2112 {
2113 tty->flags |= TTY_NOBLOCK;
2114 tty_add(tty, ctx->ptr, ctx->num);
2115 tty_invalidate(tty);
2116 }
2117
2118 void
2119 tty_cmd_syncstart(struct tty *tty, const struct tty_ctx *ctx)
2120 {
2121 if (ctx->num == 0x11) {
2122 /*
2123 * This is an overlay and a command that moves the cursor so
2124 * start synchronized updates.
2125 */
2126 tty_sync_start(tty);
2127 } else if (~ctx->num & 0x10) {
2128 /*
2129 * This is a pane. If there is an overlay, always start;
2130 * otherwise, only if requested.
2131 */
2132 if (ctx->num || tty->client->overlay_draw != NULL)
2133 tty_sync_start(tty);
2134 }
2135 }
2136
2137 void
2138 tty_cell(struct tty *tty, const struct grid_cell *gc,
2139 const struct grid_cell *defaults, struct colour_palette *palette)
2140 {
2141 const struct grid_cell *gcp;
2142
2143 /* Skip last character if terminal is stupid. */
2144 if ((tty->term->flags & TERM_NOAM) &&
2145 tty->cy == tty->sy - 1 &&
2146 tty->cx == tty->sx - 1)
2147 return;
2148
2149 /* If this is a padding character, do nothing. */
2150 if (gc->flags & GRID_FLAG_PADDING)
2151 return;
2152
2153 /* Check the output codeset and apply attributes. */
2154 gcp = tty_check_codeset(tty, gc);
2155 tty_attributes(tty, gcp, defaults, palette);
2156
2157 /* If it is a single character, write with putc to handle ACS. */
2158 if (gcp->data.size == 1) {
2159 tty_attributes(tty, gcp, defaults, palette);
2160 if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f)
2161 return;
2162 tty_putc(tty, *gcp->data.data);
2163 return;
2164 }
2165
2166 /* Write the data. */
2167 tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width);
2168 }
2169
2170 void
2171 tty_reset(struct tty *tty)
2172 {
2173 struct grid_cell *gc = &tty->cell;
2174
2175 if (!grid_cells_equal(gc, &grid_default_cell)) {
2176 if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2177 tty_putcode(tty, TTYC_RMACS);
2178 tty_putcode(tty, TTYC_SGR0);
2179 memcpy(gc, &grid_default_cell, sizeof *gc);
2180 }
2181 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2182 }
2183
2184 static void
2185 tty_invalidate(struct tty *tty)
2186 {
2187 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
2188 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2189
2190 tty->cx = tty->cy = UINT_MAX;
2191 tty->rupper = tty->rleft = UINT_MAX;
2192 tty->rlower = tty->rright = UINT_MAX;
2193
2194 if (tty->flags & TTY_STARTED) {
2195 if (tty_use_margin(tty))
2196 tty_putcode(tty, TTYC_ENMG);
2197 tty_putcode(tty, TTYC_SGR0);
2198
2199 tty->mode = ALL_MODES;
2200 tty_update_mode(tty, MODE_CURSOR, NULL);
2201
2202 tty_cursor(tty, 0, 0);
2203 tty_region_off(tty);
2204 tty_margin_off(tty);
2205 } else
2206 tty->mode = MODE_CURSOR;
2207 }
2208
2209 /* Turn off margin. */
2210 void
2211 tty_region_off(struct tty *tty)
2212 {
2213 tty_region(tty, 0, tty->sy - 1);
2214 }
2215
2216 /* Set region inside pane. */
2217 static void
2218 tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper,
2219 u_int rlower)
2220 {
2221 tty_region(tty, ctx->yoff + rupper - ctx->woy,
2222 ctx->yoff + rlower - ctx->woy);
2223 }
2224
2225 /* Set region at absolute position. */
2226 static void
2227 tty_region(struct tty *tty, u_int rupper, u_int rlower)
2228 {
2229 if (tty->rlower == rlower && tty->rupper == rupper)
2230 return;
2231 if (!tty_term_has(tty->term, TTYC_CSR))
2232 return;
2233
2234 tty->rupper = rupper;
2235 tty->rlower = rlower;
2236
2237 /*
2238 * Some terminals (such as PuTTY) do not correctly reset the cursor to
2239 * 0,0 if it is beyond the last column (they do not reset their wrap
2240 * flag so further output causes a line feed). As a workaround, do an
2241 * explicit move to 0 first.
2242 */
2243 if (tty->cx >= tty->sx) {
2244 if (tty->cy == UINT_MAX)
2245 tty_cursor(tty, 0, 0);
2246 else
2247 tty_cursor(tty, 0, tty->cy);
2248 }
2249
2250 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
2251 tty->cx = tty->cy = UINT_MAX;
2252 }
2253
2254 /* Turn off margin. */
2255 void
2256 tty_margin_off(struct tty *tty)
2257 {
2258 tty_margin(tty, 0, tty->sx - 1);
2259 }
2260
2261 /* Set margin inside pane. */
2262 static void
2263 tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx)
2264 {
2265 tty_margin(tty, ctx->xoff - ctx->wox,
2266 ctx->xoff + ctx->sx - 1 - ctx->wox);
2267 }
2268
2269 /* Set margin at absolute position. */
2270 static void
2271 tty_margin(struct tty *tty, u_int rleft, u_int rright)
2272 {
2273 if (!tty_use_margin(tty))
2274 return;
2275 if (tty->rleft == rleft && tty->rright == rright)
2276 return;
2277
2278 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
2279
2280 tty->rleft = rleft;
2281 tty->rright = rright;
2282
2283 if (rleft == 0 && rright == tty->sx - 1)
2284 tty_putcode(tty, TTYC_CLMG);
2285 else
2286 tty_putcode2(tty, TTYC_CMG, rleft, rright);
2287 tty->cx = tty->cy = UINT_MAX;
2288 }
2289
2290 /*
2291 * Move the cursor, unless it would wrap itself when the next character is
2292 * printed.
2293 */
2294 static void
2295 tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx,
2296 u_int cx, u_int cy)
2297 {
2298 if (!ctx->wrapped ||
2299 !tty_full_width(tty, ctx) ||
2300 (tty->term->flags & TERM_NOAM) ||
2301 ctx->xoff + cx != 0 ||
2302 ctx->yoff + cy != tty->cy + 1 ||
2303 tty->cx < tty->sx ||
2304 tty->cy == tty->rlower)
2305 tty_cursor_pane(tty, ctx, cx, cy);
2306 else
2307 log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy);
2308 }
2309
2310 /* Move cursor inside pane. */
2311 static void
2312 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
2313 {
2314 tty_cursor(tty, ctx->xoff + cx - ctx->wox, ctx->yoff + cy - ctx->woy);
2315 }
2316
2317 /* Move cursor to absolute position. */
2318 void
2319 tty_cursor(struct tty *tty, u_int cx, u_int cy)
2320 {
2321 struct tty_term *term = tty->term;
2322 u_int thisx, thisy;
2323 int change;
2324
2325 if (tty->flags & TTY_BLOCK)
2326 return;
2327
2328 thisx = tty->cx;
2329 thisy = tty->cy;
2330
2331 /*
2332 * If in the automargin space, and want to be there, do not move.
2333 * Otherwise, force the cursor to be in range (and complain).
2334 */
2335 if (cx == thisx && cy == thisy && cx == tty->sx)
2336 return;
2337 if (cx > tty->sx - 1) {
2338 log_debug("%s: x too big %u > %u", __func__, cx, tty->sx - 1);
2339 cx = tty->sx - 1;
2340 }
2341
2342 /* No change. */
2343 if (cx == thisx && cy == thisy)
2344 return;
2345
2346 /* Currently at the very end of the line - use absolute movement. */
2347 if (thisx > tty->sx - 1)
2348 goto absolute;
2349
2350 /* Move to home position (0, 0). */
2351 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
2352 tty_putcode(tty, TTYC_HOME);
2353 goto out;
2354 }
2355
2356 /* Zero on the next line. */
2357 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower &&
2358 (!tty_use_margin(tty) || tty->rleft == 0)) {
2359 tty_putc(tty, '\r');
2360 tty_putc(tty, '\n');
2361 goto out;
2362 }
2363
2364 /* Moving column or row. */
2365 if (cy == thisy) {
2366 /*
2367 * Moving column only, row staying the same.
2368 */
2369
2370 /* To left edge. */
2371 if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) {
2372 tty_putc(tty, '\r');
2373 goto out;
2374 }
2375
2376 /* One to the left. */
2377 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
2378 tty_putcode(tty, TTYC_CUB1);
2379 goto out;
2380 }
2381
2382 /* One to the right. */
2383 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
2384 tty_putcode(tty, TTYC_CUF1);
2385 goto out;
2386 }
2387
2388 /* Calculate difference. */
2389 change = thisx - cx; /* +ve left, -ve right */
2390
2391 /*
2392 * Use HPA if change is larger than absolute, otherwise move
2393 * the cursor with CUB/CUF.
2394 */
2395 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
2396 tty_putcode1(tty, TTYC_HPA, cx);
2397 goto out;
2398 } else if (change > 0 &&
2399 tty_term_has(term, TTYC_CUB) &&
2400 !tty_use_margin(tty)) {
2401 if (change == 2 && tty_term_has(term, TTYC_CUB1)) {
2402 tty_putcode(tty, TTYC_CUB1);
2403 tty_putcode(tty, TTYC_CUB1);
2404 goto out;
2405 }
2406 tty_putcode1(tty, TTYC_CUB, change);
2407 goto out;
2408 } else if (change < 0 &&
2409 tty_term_has(term, TTYC_CUF) &&
2410 !tty_use_margin(tty)) {
2411 tty_putcode1(tty, TTYC_CUF, -change);
2412 goto out;
2413 }
2414 } else if (cx == thisx) {
2415 /*
2416 * Moving row only, column staying the same.
2417 */
2418
2419 /* One above. */
2420 if (thisy != tty->rupper &&
2421 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
2422 tty_putcode(tty, TTYC_CUU1);
2423 goto out;
2424 }
2425
2426 /* One below. */
2427 if (thisy != tty->rlower &&
2428 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
2429 tty_putcode(tty, TTYC_CUD1);
2430 goto out;
2431 }
2432
2433 /* Calculate difference. */
2434 change = thisy - cy; /* +ve up, -ve down */
2435
2436 /*
2437 * Try to use VPA if change is larger than absolute or if this
2438 * change would cross the scroll region, otherwise use CUU/CUD.
2439 */
2440 if ((u_int) abs(change) > cy ||
2441 (change < 0 && cy - change > tty->rlower) ||
2442 (change > 0 && cy - change < tty->rupper)) {
2443 if (tty_term_has(term, TTYC_VPA)) {
2444 tty_putcode1(tty, TTYC_VPA, cy);
2445 goto out;
2446 }
2447 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
2448 tty_putcode1(tty, TTYC_CUU, change);
2449 goto out;
2450 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
2451 tty_putcode1(tty, TTYC_CUD, -change);
2452 goto out;
2453 }
2454 }
2455
2456 absolute:
2457 /* Absolute movement. */
2458 tty_putcode2(tty, TTYC_CUP, cy, cx);
2459
2460 out:
2461 tty->cx = cx;
2462 tty->cy = cy;
2463 }
2464
2465 void
2466 tty_attributes(struct tty *tty, const struct grid_cell *gc,
2467 const struct grid_cell *defaults, struct colour_palette *palette)
2468 {
2469 struct grid_cell *tc = &tty->cell, gc2;
2470 int changed;
2471
2472 /* Copy cell and update default colours. */
2473 memcpy(&gc2, gc, sizeof gc2);
2474 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2475 if (gc2.fg == 8)
2476 gc2.fg = defaults->fg;
2477 if (gc2.bg == 8)
2478 gc2.bg = defaults->bg;
2479 }
2480
2481 /* Ignore cell if it is the same as the last one. */
2482 if (gc2.attr == tty->last_cell.attr &&
2483 gc2.fg == tty->last_cell.fg &&
2484 gc2.bg == tty->last_cell.bg &&
2485 gc2.us == tty->last_cell.us)
2486 return;
2487
2488 /*
2489 * If no setab, try to use the reverse attribute as a best-effort for a
2490 * non-default background. This is a bit of a hack but it doesn't do
2491 * any serious harm and makes a couple of applications happier.
2492 */
2493 if (!tty_term_has(tty->term, TTYC_SETAB)) {
2494 if (gc2.attr & GRID_ATTR_REVERSE) {
2495 if (gc2.fg != 7 && !COLOUR_DEFAULT(gc2.fg))
2496 gc2.attr &= ~GRID_ATTR_REVERSE;
2497 } else {
2498 if (gc2.bg != 0 && !COLOUR_DEFAULT(gc2.bg))
2499 gc2.attr |= GRID_ATTR_REVERSE;
2500 }
2501 }
2502
2503 /* Fix up the colours if necessary. */
2504 tty_check_fg(tty, palette, &gc2);
2505 tty_check_bg(tty, palette, &gc2);
2506 tty_check_us(tty, palette, &gc2);
2507
2508 /*
2509 * If any bits are being cleared or the underline colour is now default,
2510 * reset everything.
2511 */
2512 if ((tc->attr & ~gc2.attr) || (tc->us != gc2.us && gc2.us == 0))
2513 tty_reset(tty);
2514
2515 /*
2516 * Set the colours. This may call tty_reset() (so it comes next) and
2517 * may add to (NOT remove) the desired attributes.
2518 */
2519 tty_colours(tty, &gc2);
2520
2521 /* Filter out attribute bits already set. */
2522 changed = gc2.attr & ~tc->attr;
2523 tc->attr = gc2.attr;
2524
2525 /* Set the attributes. */
2526 if (changed & GRID_ATTR_BRIGHT)
2527 tty_putcode(tty, TTYC_BOLD);
2528 if (changed & GRID_ATTR_DIM)
2529 tty_putcode(tty, TTYC_DIM);
2530 if (changed & GRID_ATTR_ITALICS)
2531 tty_set_italics(tty);
2532 if (changed & GRID_ATTR_ALL_UNDERSCORE) {
2533 if ((changed & GRID_ATTR_UNDERSCORE) ||
2534 !tty_term_has(tty->term, TTYC_SMULX))
2535 tty_putcode(tty, TTYC_SMUL);
2536 else if (changed & GRID_ATTR_UNDERSCORE_2)
2537 tty_putcode1(tty, TTYC_SMULX, 2);
2538 else if (changed & GRID_ATTR_UNDERSCORE_3)
2539 tty_putcode1(tty, TTYC_SMULX, 3);
2540 else if (changed & GRID_ATTR_UNDERSCORE_4)
2541 tty_putcode1(tty, TTYC_SMULX, 4);
2542 else if (changed & GRID_ATTR_UNDERSCORE_5)
2543 tty_putcode1(tty, TTYC_SMULX, 5);
2544 }
2545 if (changed & GRID_ATTR_BLINK)
2546 tty_putcode(tty, TTYC_BLINK);
2547 if (changed & GRID_ATTR_REVERSE) {
2548 if (tty_term_has(tty->term, TTYC_REV))
2549 tty_putcode(tty, TTYC_REV);
2550 else if (tty_term_has(tty->term, TTYC_SMSO))
2551 tty_putcode(tty, TTYC_SMSO);
2552 }
2553 if (changed & GRID_ATTR_HIDDEN)
2554 tty_putcode(tty, TTYC_INVIS);
2555 if (changed & GRID_ATTR_STRIKETHROUGH)
2556 tty_putcode(tty, TTYC_SMXX);
2557 if (changed & GRID_ATTR_OVERLINE)
2558 tty_putcode(tty, TTYC_SMOL);
2559 if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2560 tty_putcode(tty, TTYC_SMACS);
2561
2562 memcpy(&tty->last_cell, &gc2, sizeof tty->last_cell);
2563 }
2564
2565 static void
2566 tty_colours(struct tty *tty, const struct grid_cell *gc)
2567 {
2568 struct grid_cell *tc = &tty->cell;
2569 int have_ax;
2570
2571 /* No changes? Nothing is necessary. */
2572 if (gc->fg == tc->fg && gc->bg == tc->bg && gc->us == tc->us)
2573 return;
2574
2575 /*
2576 * Is either the default colour? This is handled specially because the
2577 * best solution might be to reset both colours to default, in which
2578 * case if only one is default need to fall onward to set the other
2579 * colour.
2580 */
2581 if (COLOUR_DEFAULT(gc->fg) || COLOUR_DEFAULT(gc->bg)) {
2582 /*
2583 * If don't have AX but do have op, send sgr0 (op can't
2584 * actually be used because it is sometimes the same as sgr0
2585 * and sometimes isn't). This resets both colours to default.
2586 *
2587 * Otherwise, try to set the default colour only as needed.
2588 */
2589 have_ax = tty_term_flag(tty->term, TTYC_AX);
2590 if (!have_ax && tty_term_has(tty->term, TTYC_OP))
2591 tty_reset(tty);
2592 else {
2593 if (COLOUR_DEFAULT(gc->fg) && !COLOUR_DEFAULT(tc->fg)) {
2594 if (have_ax)
2595 tty_puts(tty, "\033[39m");
2596 else if (tc->fg != 7)
2597 tty_putcode1(tty, TTYC_SETAF, 7);
2598 tc->fg = gc->fg;
2599 }
2600 if (COLOUR_DEFAULT(gc->bg) && !COLOUR_DEFAULT(tc->bg)) {
2601 if (have_ax)
2602 tty_puts(tty, "\033[49m");
2603 else if (tc->bg != 0)
2604 tty_putcode1(tty, TTYC_SETAB, 0);
2605 tc->bg = gc->bg;
2606 }
2607 }
2608 }
2609
2610 /* Set the foreground colour. */
2611 if (!COLOUR_DEFAULT(gc->fg) && gc->fg != tc->fg)
2612 tty_colours_fg(tty, gc);
2613
2614 /*
2615 * Set the background colour. This must come after the foreground as
2616 * tty_colour_fg() can call tty_reset().
2617 */
2618 if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg)
2619 tty_colours_bg(tty, gc);
2620
2621 /* Set the underscore colour. */
2622 if (gc->us != tc->us)
2623 tty_colours_us(tty, gc);
2624 }
2625
2626 static void
2627 tty_check_fg(struct tty *tty, struct colour_palette *palette,
2628 struct grid_cell *gc)
2629 {
2630 u_char r, g, b;
2631 u_int colours;
2632 int c;
2633
2634 /*
2635 * Perform substitution if this pane has a palette. If the bright
2636 * attribute is set, use the bright entry in the palette by changing to
2637 * the aixterm colour.
2638 */
2639 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2640 c = gc->fg;
2641 if (c < 8 && gc->attr & GRID_ATTR_BRIGHT)
2642 c += 90;
2643 if ((c = colour_palette_get(palette, c)) != -1)
2644 gc->fg = c;
2645 }
2646
2647 /* Is this a 24-bit colour? */
2648 if (gc->fg & COLOUR_FLAG_RGB) {
2649 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2650 if (tty->term->flags & TERM_RGBCOLOURS)
2651 return;
2652 colour_split_rgb(gc->fg, &r, &g, &b);
2653 gc->fg = colour_find_rgb(r, g, b);
2654 }
2655
2656 /* How many colours does this terminal have? */
2657 if (tty->term->flags & TERM_256COLOURS)
2658 colours = 256;
2659 else
2660 colours = tty_term_number(tty->term, TTYC_COLORS);
2661
2662 /* Is this a 256-colour colour? */
2663 if (gc->fg & COLOUR_FLAG_256) {
2664 /* And not a 256 colour mode? */
2665 if (colours < 256) {
2666 gc->fg = colour_256to16(gc->fg);
2667 if (gc->fg & 8) {
2668 gc->fg &= 7;
2669 if (colours >= 16)
2670 gc->fg += 90;
2671 }
2672 }
2673 return;
2674 }
2675
2676 /* Is this an aixterm colour? */
2677 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
2678 gc->fg -= 90;
2679 gc->attr |= GRID_ATTR_BRIGHT;
2680 }
2681 }
2682
2683 static void
2684 tty_check_bg(struct tty *tty, struct colour_palette *palette,
2685 struct grid_cell *gc)
2686 {
2687 u_char r, g, b;
2688 u_int colours;
2689 int c;
2690
2691 /* Perform substitution if this pane has a palette. */
2692 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2693 if ((c = colour_palette_get(palette, gc->bg)) != -1)
2694 gc->bg = c;
2695 }
2696
2697 /* Is this a 24-bit colour? */
2698 if (gc->bg & COLOUR_FLAG_RGB) {
2699 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2700 if (tty->term->flags & TERM_RGBCOLOURS)
2701 return;
2702 colour_split_rgb(gc->bg, &r, &g, &b);
2703 gc->bg = colour_find_rgb(r, g, b);
2704 }
2705
2706 /* How many colours does this terminal have? */
2707 if (tty->term->flags & TERM_256COLOURS)
2708 colours = 256;
2709 else
2710 colours = tty_term_number(tty->term, TTYC_COLORS);
2711
2712 /* Is this a 256-colour colour? */
2713 if (gc->bg & COLOUR_FLAG_256) {
2714 /*
2715 * And not a 256 colour mode? Translate to 16-colour
2716 * palette. Bold background doesn't exist portably, so just
2717 * discard the bold bit if set.
2718 */
2719 if (colours < 256) {
2720 gc->bg = colour_256to16(gc->bg);
2721 if (gc->bg & 8) {
2722 gc->bg &= 7;
2723 if (colours >= 16)
2724 gc->bg += 90;
2725 }
2726 }
2727 return;
2728 }
2729
2730 /* Is this an aixterm colour? */
2731 if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
2732 gc->bg -= 90;
2733 }
2734
2735 static void
2736 tty_check_us(__unused struct tty *tty, struct colour_palette *palette,
2737 struct grid_cell *gc)
2738 {
2739 int c;
2740
2741 /* Perform substitution if this pane has a palette. */
2742 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2743 if ((c = colour_palette_get(palette, gc->us)) != -1)
2744 gc->us = c;
2745 }
2746
2747 /* Underscore colour is set as RGB so convert a 256 colour to RGB. */
2748 if (gc->us & COLOUR_FLAG_256)
2749 gc->us = colour_256toRGB (gc->us);
2750 }
2751
2752 static void
2753 tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
2754 {
2755 struct grid_cell *tc = &tty->cell;
2756 char s[32];
2757
2758 /* Is this a 24-bit or 256-colour colour? */
2759 if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
2760 if (tty_try_colour(tty, gc->fg, "38") == 0)
2761 goto save;
2762 /* Should not get here, already converted in tty_check_fg. */
2763 return;
2764 }
2765
2766 /* Is this an aixterm bright colour? */
2767 if (gc->fg >= 90 && gc->fg <= 97) {
2768 if (tty->term->flags & TERM_256COLOURS) {
2769 xsnprintf(s, sizeof s, "\033[%dm", gc->fg);
2770 tty_puts(tty, s);
2771 } else
2772 tty_putcode1(tty, TTYC_SETAF, gc->fg - 90 + 8);
2773 goto save;
2774 }
2775
2776 /* Otherwise set the foreground colour. */
2777 tty_putcode1(tty, TTYC_SETAF, gc->fg);
2778
2779 save:
2780 /* Save the new values in the terminal current cell. */
2781 tc->fg = gc->fg;
2782 }
2783
2784 static void
2785 tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
2786 {
2787 struct grid_cell *tc = &tty->cell;
2788 char s[32];
2789
2790 /* Is this a 24-bit or 256-colour colour? */
2791 if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
2792 if (tty_try_colour(tty, gc->bg, "48") == 0)
2793 goto save;
2794 /* Should not get here, already converted in tty_check_bg. */
2795 return;
2796 }
2797
2798 /* Is this an aixterm bright colour? */
2799 if (gc->bg >= 90 && gc->bg <= 97) {
2800 if (tty->term->flags & TERM_256COLOURS) {
2801 xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10);
2802 tty_puts(tty, s);
2803 } else
2804 tty_putcode1(tty, TTYC_SETAB, gc->bg - 90 + 8);
2805 goto save;
2806 }
2807
2808 /* Otherwise set the background colour. */
2809 tty_putcode1(tty, TTYC_SETAB, gc->bg);
2810
2811 save:
2812 /* Save the new values in the terminal current cell. */
2813 tc->bg = gc->bg;
2814 }
2815
2816 static void
2817 tty_colours_us(struct tty *tty, const struct grid_cell *gc)
2818 {
2819 struct grid_cell *tc = &tty->cell;
2820 u_int c;
2821 u_char r, g, b;
2822
2823 /* Clear underline colour. */
2824 if (gc->us == 0) {
2825 tty_putcode(tty, TTYC_OL);
2826 goto save;
2827 }
2828
2829 /* Must be an RGB colour - this should never happen. */
2830 if (~gc->us & COLOUR_FLAG_RGB)
2831 return;
2832
2833 /*
2834 * Setulc and setal follows the ncurses(3) one argument "direct colour"
2835 * capability format. Calculate the colour value.
2836 */
2837 colour_split_rgb(gc->us, &r, &g, &b);
2838 c = (65536 * r) + (256 * g) + b;
2839
2840 /*
2841 * Write the colour. Only use setal if the RGB flag is set because the
2842 * non-RGB version may be wrong.
2843 */
2844 if (tty_term_has(tty->term, TTYC_SETULC))
2845 tty_putcode1(tty, TTYC_SETULC, c);
2846 else if (tty_term_has(tty->term, TTYC_SETAL) &&
2847 tty_term_has(tty->term, TTYC_RGB))
2848 tty_putcode1(tty, TTYC_SETAL, c);
2849
2850 save:
2851 /* Save the new values in the terminal current cell. */
2852 tc->us = gc->us;
2853 }
2854
2855 static int
2856 tty_try_colour(struct tty *tty, int colour, const char *type)
2857 {
2858 u_char r, g, b;
2859
2860 if (colour & COLOUR_FLAG_256) {
2861 if (*type == '3' && tty_term_has(tty->term, TTYC_SETAF))
2862 tty_putcode1(tty, TTYC_SETAF, colour & 0xff);
2863 else if (tty_term_has(tty->term, TTYC_SETAB))
2864 tty_putcode1(tty, TTYC_SETAB, colour & 0xff);
2865 return (0);
2866 }
2867
2868 if (colour & COLOUR_FLAG_RGB) {
2869 colour_split_rgb(colour & 0xffffff, &r, &g, &b);
2870 if (*type == '3' && tty_term_has(tty->term, TTYC_SETRGBF))
2871 tty_putcode3(tty, TTYC_SETRGBF, r, g, b);
2872 else if (tty_term_has(tty->term, TTYC_SETRGBB))
2873 tty_putcode3(tty, TTYC_SETRGBB, r, g, b);
2874 return (0);
2875 }
2876
2877 return (-1);
2878 }
2879
2880 static void
2881 tty_window_default_style(struct grid_cell *gc, struct window_pane *wp)
2882 {
2883 memcpy(gc, &grid_default_cell, sizeof *gc);
2884 gc->fg = wp->palette.fg;
2885 gc->bg = wp->palette.bg;
2886 }
2887
2888 void
2889 tty_default_colours(struct grid_cell *gc, struct window_pane *wp)
2890 {
2891 struct options *oo = wp->options;
2892 struct format_tree *ft;
2893
2894 memcpy(gc, &grid_default_cell, sizeof *gc);
2895
2896 if (wp->flags & PANE_STYLECHANGED) {
2897 log_debug("%%%u: style changed", wp->id);
2898 wp->flags &= ~PANE_STYLECHANGED;
2899
2900 ft = format_create(NULL, NULL, FORMAT_PANE|wp->id,
2901 FORMAT_NOJOBS);
2902 format_defaults(ft, NULL, NULL, NULL, wp);
2903 tty_window_default_style(&wp->cached_active_gc, wp);
2904 style_add(&wp->cached_active_gc, oo, "window-active-style", ft);
2905 tty_window_default_style(&wp->cached_gc, wp);
2906 style_add(&wp->cached_gc, oo, "window-style", ft);
2907 format_free(ft);
2908 }
2909
2910 if (gc->fg == 8) {
2911 if (wp == wp->window->active && wp->cached_active_gc.fg != 8)
2912 gc->fg = wp->cached_active_gc.fg;
2913 else
2914 gc->fg = wp->cached_gc.fg;
2915 }
2916
2917 if (gc->bg == 8) {
2918 if (wp == wp->window->active && wp->cached_active_gc.bg != 8)
2919 gc->bg = wp->cached_active_gc.bg;
2920 else
2921 gc->bg = wp->cached_gc.bg;
2922 }
2923 }
2924
2925 static void
2926 tty_default_attributes(struct tty *tty, const struct grid_cell *defaults,
2927 struct colour_palette *palette, u_int bg)
2928 {
2929 struct grid_cell gc;
2930
2931 memcpy(&gc, &grid_default_cell, sizeof gc);
2932 gc.bg = bg;
2933 tty_attributes(tty, &gc, defaults, palette);
2934 }
2935
2936 static void
2937 tty_clipboard_query_callback(__unused int fd, __unused short events, void *data)
2938 {
2939 struct tty *tty = data;
2940 struct client *c = tty->client;
2941
2942 c->flags &= ~CLIENT_CLIPBOARDBUFFER;
2943 free(c->clipboard_panes);
2944 c->clipboard_panes = NULL;
2945 c->clipboard_npanes = 0;
2946
2947 tty->flags &= ~TTY_OSC52QUERY;
2948 }
2949
2950 void
2951 tty_clipboard_query(struct tty *tty)
2952 {
2953 struct timeval tv = { .tv_sec = TTY_QUERY_TIMEOUT };
2954
2955 if ((~tty->flags & TTY_STARTED) || (tty->flags & TTY_OSC52QUERY))
2956 return;
2957 tty_putcode_ptr2(tty, TTYC_MS, "", "?");
2958
2959 tty->flags |= TTY_OSC52QUERY;
2960 evtimer_set(&tty->clipboard_timer, tty_clipboard_query_callback, tty);
2961 evtimer_add(&tty->clipboard_timer, &tv);
2962 }
tmux -- terminal multiplexer similar to GNU Screen