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Check fdopen return value, from Christian Menges.
[tmux-openbsd.git] / tty.c
blob225d0058d9beb51bfdab9942e95f99b2f8881a02
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 tty_invalidate(tty);
487 }
488
489 void
490 tty_raw(struct tty *tty, const char *s)
491 {
492 struct client *c = tty->client;
493 ssize_t n, slen;
494 u_int i;
495
496 slen = strlen(s);
497 for (i = 0; i < 5; i++) {
498 n = write(c->fd, s, slen);
499 if (n >= 0) {
500 s += n;
501 slen -= n;
502 if (slen == 0)
503 break;
504 } else if (n == -1 && errno != EAGAIN)
505 break;
506 usleep(100);
507 }
508 }
509
510 void
511 tty_putcode(struct tty *tty, enum tty_code_code code)
512 {
513 tty_puts(tty, tty_term_string(tty->term, code));
514 }
515
516 void
517 tty_putcode_i(struct tty *tty, enum tty_code_code code, int a)
518 {
519 if (a < 0)
520 return;
521 tty_puts(tty, tty_term_string_i(tty->term, code, a));
522 }
523
524 void
525 tty_putcode_ii(struct tty *tty, enum tty_code_code code, int a, int b)
526 {
527 if (a < 0 || b < 0)
528 return;
529 tty_puts(tty, tty_term_string_ii(tty->term, code, a, b));
530 }
531
532 void
533 tty_putcode_iii(struct tty *tty, enum tty_code_code code, int a, int b, int c)
534 {
535 if (a < 0 || b < 0 || c < 0)
536 return;
537 tty_puts(tty, tty_term_string_iii(tty->term, code, a, b, c));
538 }
539
540 void
541 tty_putcode_s(struct tty *tty, enum tty_code_code code, const char *a)
542 {
543 if (a != NULL)
544 tty_puts(tty, tty_term_string_s(tty->term, code, a));
545 }
546
547 void
548 tty_putcode_ss(struct tty *tty, enum tty_code_code code, const char *a,
549 const char *b)
550 {
551 if (a != NULL && b != NULL)
552 tty_puts(tty, tty_term_string_ss(tty->term, code, a, b));
553 }
554
555 static void
556 tty_add(struct tty *tty, const char *buf, size_t len)
557 {
558 struct client *c = tty->client;
559
560 if (tty->flags & TTY_BLOCK) {
561 tty->discarded += len;
562 return;
563 }
564
565 evbuffer_add(tty->out, buf, len);
566 log_debug("%s: %.*s", c->name, (int)len, buf);
567 c->written += len;
568
569 if (tty_log_fd != -1)
570 write(tty_log_fd, buf, len);
571 if (tty->flags & TTY_STARTED)
572 event_add(&tty->event_out, NULL);
573 }
574
575 void
576 tty_puts(struct tty *tty, const char *s)
577 {
578 if (*s != '\0')
579 tty_add(tty, s, strlen(s));
580 }
581
582 void
583 tty_putc(struct tty *tty, u_char ch)
584 {
585 const char *acs;
586
587 if ((tty->term->flags & TERM_NOAM) &&
588 ch >= 0x20 && ch != 0x7f &&
589 tty->cy == tty->sy - 1 &&
590 tty->cx + 1 >= tty->sx)
591 return;
592
593 if (tty->cell.attr & GRID_ATTR_CHARSET) {
594 acs = tty_acs_get(tty, ch);
595 if (acs != NULL)
596 tty_add(tty, acs, strlen(acs));
597 else
598 tty_add(tty, &ch, 1);
599 } else
600 tty_add(tty, &ch, 1);
601
602 if (ch >= 0x20 && ch != 0x7f) {
603 if (tty->cx >= tty->sx) {
604 tty->cx = 1;
605 if (tty->cy != tty->rlower)
606 tty->cy++;
607
608 /*
609 * On !am terminals, force the cursor position to where
610 * we think it should be after a line wrap - this means
611 * it works on sensible terminals as well.
612 */
613 if (tty->term->flags & TERM_NOAM)
614 tty_putcode_ii(tty, TTYC_CUP, tty->cy, tty->cx);
615 } else
616 tty->cx++;
617 }
618 }
619
620 void
621 tty_putn(struct tty *tty, const void *buf, size_t len, u_int width)
622 {
623 if ((tty->term->flags & TERM_NOAM) &&
624 tty->cy == tty->sy - 1 &&
625 tty->cx + len >= tty->sx)
626 len = tty->sx - tty->cx - 1;
627
628 tty_add(tty, buf, len);
629 if (tty->cx + width > tty->sx) {
630 tty->cx = (tty->cx + width) - tty->sx;
631 if (tty->cx <= tty->sx)
632 tty->cy++;
633 else
634 tty->cx = tty->cy = UINT_MAX;
635 } else
636 tty->cx += width;
637 }
638
639 static void
640 tty_set_italics(struct tty *tty)
641 {
642 const char *s;
643
644 if (tty_term_has(tty->term, TTYC_SITM)) {
645 s = options_get_string(global_options, "default-terminal");
646 if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) {
647 tty_putcode(tty, TTYC_SITM);
648 return;
649 }
650 }
651 tty_putcode(tty, TTYC_SMSO);
652 }
653
654 void
655 tty_set_title(struct tty *tty, const char *title)
656 {
657 if (!tty_term_has(tty->term, TTYC_TSL) ||
658 !tty_term_has(tty->term, TTYC_FSL))
659 return;
660
661 tty_putcode(tty, TTYC_TSL);
662 tty_puts(tty, title);
663 tty_putcode(tty, TTYC_FSL);
664 }
665
666 void
667 tty_set_path(struct tty *tty, const char *title)
668 {
669 if (!tty_term_has(tty->term, TTYC_SWD) ||
670 !tty_term_has(tty->term, TTYC_FSL))
671 return;
672
673 tty_putcode(tty, TTYC_SWD);
674 tty_puts(tty, title);
675 tty_putcode(tty, TTYC_FSL);
676 }
677
678 static void
679 tty_force_cursor_colour(struct tty *tty, int c)
680 {
681 u_char r, g, b;
682 char s[13];
683
684 if (c != -1)
685 c = colour_force_rgb(c);
686 if (c == tty->ccolour)
687 return;
688 if (c == -1)
689 tty_putcode(tty, TTYC_CR);
690 else {
691 colour_split_rgb(c, &r, &g, &b);
692 xsnprintf(s, sizeof s, "rgb:%02hhx/%02hhx/%02hhx", r, g, b);
693 tty_putcode_s(tty, TTYC_CS, s);
694 }
695 tty->ccolour = c;
696 }
697
698 static int
699 tty_update_cursor(struct tty *tty, int mode, struct screen *s)
700 {
701 enum screen_cursor_style cstyle;
702 int ccolour, changed, cmode = mode;
703
704 /* Set cursor colour if changed. */
705 if (s != NULL) {
706 ccolour = s->ccolour;
707 if (s->ccolour == -1)
708 ccolour = s->default_ccolour;
709 tty_force_cursor_colour(tty, ccolour);
710 }
711
712 /* If cursor is off, set as invisible. */
713 if (~cmode & MODE_CURSOR) {
714 if (tty->mode & MODE_CURSOR)
715 tty_putcode(tty, TTYC_CIVIS);
716 return (cmode);
717 }
718
719 /* Check if blinking or very visible flag changed or style changed. */
720 if (s == NULL)
721 cstyle = tty->cstyle;
722 else {
723 cstyle = s->cstyle;
724 if (cstyle == SCREEN_CURSOR_DEFAULT) {
725 if (~cmode & MODE_CURSOR_BLINKING_SET) {
726 if (s->default_mode & MODE_CURSOR_BLINKING)
727 cmode |= MODE_CURSOR_BLINKING;
728 else
729 cmode &= ~MODE_CURSOR_BLINKING;
730 }
731 cstyle = s->default_cstyle;
732 }
733 }
734
735 /* If nothing changed, do nothing. */
736 changed = cmode ^ tty->mode;
737 if ((changed & CURSOR_MODES) == 0 && cstyle == tty->cstyle)
738 return (cmode);
739
740 /*
741 * Set cursor style. If an explicit style has been set with DECSCUSR,
742 * set it if supported, otherwise send cvvis for blinking styles.
743 *
744 * If no style, has been set (SCREEN_CURSOR_DEFAULT), then send cvvis
745 * if either the blinking or very visible flags are set.
746 */
747 tty_putcode(tty, TTYC_CNORM);
748 switch (cstyle) {
749 case SCREEN_CURSOR_DEFAULT:
750 if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
751 if (tty_term_has(tty->term, TTYC_SE))
752 tty_putcode(tty, TTYC_SE);
753 else
754 tty_putcode_i(tty, TTYC_SS, 0);
755 }
756 if (cmode & (MODE_CURSOR_BLINKING|MODE_CURSOR_VERY_VISIBLE))
757 tty_putcode(tty, TTYC_CVVIS);
758 break;
759 case SCREEN_CURSOR_BLOCK:
760 if (tty_term_has(tty->term, TTYC_SS)) {
761 if (cmode & MODE_CURSOR_BLINKING)
762 tty_putcode_i(tty, TTYC_SS, 1);
763 else
764 tty_putcode_i(tty, TTYC_SS, 2);
765 } else if (cmode & MODE_CURSOR_BLINKING)
766 tty_putcode(tty, TTYC_CVVIS);
767 break;
768 case SCREEN_CURSOR_UNDERLINE:
769 if (tty_term_has(tty->term, TTYC_SS)) {
770 if (cmode & MODE_CURSOR_BLINKING)
771 tty_putcode_i(tty, TTYC_SS, 3);
772 else
773 tty_putcode_i(tty, TTYC_SS, 4);
774 } else if (cmode & MODE_CURSOR_BLINKING)
775 tty_putcode(tty, TTYC_CVVIS);
776 break;
777 case SCREEN_CURSOR_BAR:
778 if (tty_term_has(tty->term, TTYC_SS)) {
779 if (cmode & MODE_CURSOR_BLINKING)
780 tty_putcode_i(tty, TTYC_SS, 5);
781 else
782 tty_putcode_i(tty, TTYC_SS, 6);
783 } else if (cmode & MODE_CURSOR_BLINKING)
784 tty_putcode(tty, TTYC_CVVIS);
785 break;
786 }
787 tty->cstyle = cstyle;
788 return (cmode);
789 }
790
791 void
792 tty_update_mode(struct tty *tty, int mode, struct screen *s)
793 {
794 struct tty_term *term = tty->term;
795 struct client *c = tty->client;
796 int changed;
797
798 if (tty->flags & TTY_NOCURSOR)
799 mode &= ~MODE_CURSOR;
800
801 if (tty_update_cursor(tty, mode, s) & MODE_CURSOR_BLINKING)
802 mode |= MODE_CURSOR_BLINKING;
803 else
804 mode &= ~MODE_CURSOR_BLINKING;
805
806 changed = mode ^ tty->mode;
807 if (log_get_level() != 0 && changed != 0) {
808 log_debug("%s: current mode %s", c->name,
809 screen_mode_to_string(tty->mode));
810 log_debug("%s: setting mode %s", c->name,
811 screen_mode_to_string(mode));
812 }
813
814 if ((changed & ALL_MOUSE_MODES) && tty_term_has(term, TTYC_KMOUS)) {
815 /*
816 * If the mouse modes have changed, clear then all and apply
817 * again. There are differences in how terminals track the
818 * various bits.
819 */
820 tty_puts(tty, "\033[?1006l\033[?1000l\033[?1002l\033[?1003l");
821 if (mode & ALL_MOUSE_MODES)
822 tty_puts(tty, "\033[?1006h");
823 if (mode & MODE_MOUSE_ALL)
824 tty_puts(tty, "\033[?1000h\033[?1002h\033[?1003h");
825 else if (mode & MODE_MOUSE_BUTTON)
826 tty_puts(tty, "\033[?1000h\033[?1002h");
827 else if (mode & MODE_MOUSE_STANDARD)
828 tty_puts(tty, "\033[?1000h");
829 }
830 tty->mode = mode;
831 }
832
833 static void
834 tty_emulate_repeat(struct tty *tty, enum tty_code_code code,
835 enum tty_code_code code1, u_int n)
836 {
837 if (tty_term_has(tty->term, code))
838 tty_putcode_i(tty, code, n);
839 else {
840 while (n-- > 0)
841 tty_putcode(tty, code1);
842 }
843 }
844
845 static void
846 tty_repeat_space(struct tty *tty, u_int n)
847 {
848 static char s[500];
849
850 if (*s != ' ')
851 memset(s, ' ', sizeof s);
852
853 while (n > sizeof s) {
854 tty_putn(tty, s, sizeof s, sizeof s);
855 n -= sizeof s;
856 }
857 if (n != 0)
858 tty_putn(tty, s, n, n);
859 }
860
861 /* Is this window bigger than the terminal? */
862 int
863 tty_window_bigger(struct tty *tty)
864 {
865 struct client *c = tty->client;
866 struct window *w = c->session->curw->window;
867
868 return (tty->sx < w->sx || tty->sy - status_line_size(c) < w->sy);
869 }
870
871 /* What offset should this window be drawn at? */
872 int
873 tty_window_offset(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
874 {
875 *ox = tty->oox;
876 *oy = tty->ooy;
877 *sx = tty->osx;
878 *sy = tty->osy;
879
880 return (tty->oflag);
881 }
882
883 /* What offset should this window be drawn at? */
884 static int
885 tty_window_offset1(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
886 {
887 struct client *c = tty->client;
888 struct window *w = c->session->curw->window;
889 struct window_pane *wp = server_client_get_pane(c);
890 u_int cx, cy, lines;
891
892 lines = status_line_size(c);
893
894 if (tty->sx >= w->sx && tty->sy - lines >= w->sy) {
895 *ox = 0;
896 *oy = 0;
897 *sx = w->sx;
898 *sy = w->sy;
899
900 c->pan_window = NULL;
901 return (0);
902 }
903
904 *sx = tty->sx;
905 *sy = tty->sy - lines;
906
907 if (c->pan_window == w) {
908 if (*sx >= w->sx)
909 c->pan_ox = 0;
910 else if (c->pan_ox + *sx > w->sx)
911 c->pan_ox = w->sx - *sx;
912 *ox = c->pan_ox;
913 if (*sy >= w->sy)
914 c->pan_oy = 0;
915 else if (c->pan_oy + *sy > w->sy)
916 c->pan_oy = w->sy - *sy;
917 *oy = c->pan_oy;
918 return (1);
919 }
920
921 if (~wp->screen->mode & MODE_CURSOR) {
922 *ox = 0;
923 *oy = 0;
924 } else {
925 cx = wp->xoff + wp->screen->cx;
926 cy = wp->yoff + wp->screen->cy;
927
928 if (cx < *sx)
929 *ox = 0;
930 else if (cx > w->sx - *sx)
931 *ox = w->sx - *sx;
932 else
933 *ox = cx - *sx / 2;
934
935 if (cy < *sy)
936 *oy = 0;
937 else if (cy > w->sy - *sy)
938 *oy = w->sy - *sy;
939 else
940 *oy = cy - *sy / 2;
941 }
942
943 c->pan_window = NULL;
944 return (1);
945 }
946
947 /* Update stored offsets for a window and redraw if necessary. */
948 void
949 tty_update_window_offset(struct window *w)
950 {
951 struct client *c;
952
953 TAILQ_FOREACH(c, &clients, entry) {
954 if (c->session != NULL &&
955 c->session->curw != NULL &&
956 c->session->curw->window == w)
957 tty_update_client_offset(c);
958 }
959 }
960
961 /* Update stored offsets for a client and redraw if necessary. */
962 void
963 tty_update_client_offset(struct client *c)
964 {
965 u_int ox, oy, sx, sy;
966
967 if (~c->flags & CLIENT_TERMINAL)
968 return;
969
970 c->tty.oflag = tty_window_offset1(&c->tty, &ox, &oy, &sx, &sy);
971 if (ox == c->tty.oox &&
972 oy == c->tty.ooy &&
973 sx == c->tty.osx &&
974 sy == c->tty.osy)
975 return;
976
977 log_debug ("%s: %s offset has changed (%u,%u %ux%u -> %u,%u %ux%u)",
978 __func__, c->name, c->tty.oox, c->tty.ooy, c->tty.osx, c->tty.osy,
979 ox, oy, sx, sy);
980
981 c->tty.oox = ox;
982 c->tty.ooy = oy;
983 c->tty.osx = sx;
984 c->tty.osy = sy;
985
986 c->flags |= (CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS);
987 }
988
989 /*
990 * Is the region large enough to be worth redrawing once later rather than
991 * probably several times now? Currently yes if it is more than 50% of the
992 * pane.
993 */
994 static int
995 tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx)
996 {
997 return (ctx->orlower - ctx->orupper >= ctx->sy / 2);
998 }
999
1000 /*
1001 * Return if BCE is needed but the terminal doesn't have it - it'll need to be
1002 * emulated.
1003 */
1004 static int
1005 tty_fake_bce(const struct tty *tty, const struct grid_cell *gc, u_int bg)
1006 {
1007 if (tty_term_flag(tty->term, TTYC_BCE))
1008 return (0);
1009 if (!COLOUR_DEFAULT(bg) || !COLOUR_DEFAULT(gc->bg))
1010 return (1);
1011 return (0);
1012 }
1013
1014 /*
1015 * Redraw scroll region using data from screen (already updated). Used when
1016 * CSR not supported, or window is a pane that doesn't take up the full
1017 * width of the terminal.
1018 */
1019 static void
1020 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
1021 {
1022 struct client *c = tty->client;
1023 u_int i;
1024
1025 /*
1026 * If region is large, schedule a redraw. In most cases this is likely
1027 * to be followed by some more scrolling.
1028 */
1029 if (tty_large_region(tty, ctx)) {
1030 log_debug("%s: %s large redraw", __func__, c->name);
1031 ctx->redraw_cb(ctx);
1032 return;
1033 }
1034
1035 for (i = ctx->orupper; i <= ctx->orlower; i++)
1036 tty_draw_pane(tty, ctx, i);
1037 }
1038
1039 /* Is this position visible in the pane? */
1040 static int
1041 tty_is_visible(__unused struct tty *tty, const struct tty_ctx *ctx, u_int px,
1042 u_int py, u_int nx, u_int ny)
1043 {
1044 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1045
1046 if (!ctx->bigger)
1047 return (1);
1048
1049 if (xoff + nx <= ctx->wox || xoff >= ctx->wox + ctx->wsx ||
1050 yoff + ny <= ctx->woy || yoff >= ctx->woy + ctx->wsy)
1051 return (0);
1052 return (1);
1053 }
1054
1055 /* Clamp line position to visible part of pane. */
1056 static int
1057 tty_clamp_line(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1058 u_int nx, u_int *i, u_int *x, u_int *rx, u_int *ry)
1059 {
1060 u_int xoff = ctx->rxoff + px;
1061
1062 if (!tty_is_visible(tty, ctx, px, py, nx, 1))
1063 return (0);
1064 *ry = ctx->yoff + py - ctx->woy;
1065
1066 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1067 /* All visible. */
1068 *i = 0;
1069 *x = ctx->xoff + px - ctx->wox;
1070 *rx = nx;
1071 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1072 /* Both left and right not visible. */
1073 *i = ctx->wox;
1074 *x = 0;
1075 *rx = ctx->wsx;
1076 } else if (xoff < ctx->wox) {
1077 /* Left not visible. */
1078 *i = ctx->wox - (ctx->xoff + px);
1079 *x = 0;
1080 *rx = nx - *i;
1081 } else {
1082 /* Right not visible. */
1083 *i = 0;
1084 *x = (ctx->xoff + px) - ctx->wox;
1085 *rx = ctx->wsx - *x;
1086 }
1087 if (*rx > nx)
1088 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1089
1090 return (1);
1091 }
1092
1093 /* Clear a line. */
1094 static void
1095 tty_clear_line(struct tty *tty, const struct grid_cell *defaults, u_int py,
1096 u_int px, u_int nx, u_int bg)
1097 {
1098 struct client *c = tty->client;
1099 struct overlay_ranges r;
1100 u_int i;
1101
1102 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1103
1104 /* Nothing to clear. */
1105 if (nx == 0)
1106 return;
1107
1108 /* If genuine BCE is available, can try escape sequences. */
1109 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1110 /* Off the end of the line, use EL if available. */
1111 if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) {
1112 tty_cursor(tty, px, py);
1113 tty_putcode(tty, TTYC_EL);
1114 return;
1115 }
1116
1117 /* At the start of the line. Use EL1. */
1118 if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) {
1119 tty_cursor(tty, px + nx - 1, py);
1120 tty_putcode(tty, TTYC_EL1);
1121 return;
1122 }
1123
1124 /* Section of line. Use ECH if possible. */
1125 if (tty_term_has(tty->term, TTYC_ECH)) {
1126 tty_cursor(tty, px, py);
1127 tty_putcode_i(tty, TTYC_ECH, nx);
1128 return;
1129 }
1130 }
1131
1132 /*
1133 * Couldn't use an escape sequence, use spaces. Clear only the visible
1134 * bit if there is an overlay.
1135 */
1136 tty_check_overlay_range(tty, px, py, nx, &r);
1137 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
1138 if (r.nx[i] == 0)
1139 continue;
1140 tty_cursor(tty, r.px[i], py);
1141 tty_repeat_space(tty, r.nx[i]);
1142 }
1143 }
1144
1145 /* Clear a line, adjusting to visible part of pane. */
1146 static void
1147 tty_clear_pane_line(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1148 u_int px, u_int nx, u_int bg)
1149 {
1150 struct client *c = tty->client;
1151 u_int i, x, rx, ry;
1152
1153 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1154
1155 if (tty_clamp_line(tty, ctx, px, py, nx, &i, &x, &rx, &ry))
1156 tty_clear_line(tty, &ctx->defaults, ry, x, rx, bg);
1157 }
1158
1159 /* Clamp area position to visible part of pane. */
1160 static int
1161 tty_clamp_area(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1162 u_int nx, u_int ny, u_int *i, u_int *j, u_int *x, u_int *y, u_int *rx,
1163 u_int *ry)
1164 {
1165 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1166
1167 if (!tty_is_visible(tty, ctx, px, py, nx, ny))
1168 return (0);
1169
1170 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1171 /* All visible. */
1172 *i = 0;
1173 *x = ctx->xoff + px - ctx->wox;
1174 *rx = nx;
1175 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1176 /* Both left and right not visible. */
1177 *i = ctx->wox;
1178 *x = 0;
1179 *rx = ctx->wsx;
1180 } else if (xoff < ctx->wox) {
1181 /* Left not visible. */
1182 *i = ctx->wox - (ctx->xoff + px);
1183 *x = 0;
1184 *rx = nx - *i;
1185 } else {
1186 /* Right not visible. */
1187 *i = 0;
1188 *x = (ctx->xoff + px) - ctx->wox;
1189 *rx = ctx->wsx - *x;
1190 }
1191 if (*rx > nx)
1192 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1193
1194 if (yoff >= ctx->woy && yoff + ny <= ctx->woy + ctx->wsy) {
1195 /* All visible. */
1196 *j = 0;
1197 *y = ctx->yoff + py - ctx->woy;
1198 *ry = ny;
1199 } else if (yoff < ctx->woy && yoff + ny > ctx->woy + ctx->wsy) {
1200 /* Both top and bottom not visible. */
1201 *j = ctx->woy;
1202 *y = 0;
1203 *ry = ctx->wsy;
1204 } else if (yoff < ctx->woy) {
1205 /* Top not visible. */
1206 *j = ctx->woy - (ctx->yoff + py);
1207 *y = 0;
1208 *ry = ny - *j;
1209 } else {
1210 /* Bottom not visible. */
1211 *j = 0;
1212 *y = (ctx->yoff + py) - ctx->woy;
1213 *ry = ctx->wsy - *y;
1214 }
1215 if (*ry > ny)
1216 fatalx("%s: y too big, %u > %u", __func__, *ry, ny);
1217
1218 return (1);
1219 }
1220
1221 /* Clear an area, adjusting to visible part of pane. */
1222 static void
1223 tty_clear_area(struct tty *tty, const struct grid_cell *defaults, u_int py,
1224 u_int ny, u_int px, u_int nx, u_int bg)
1225 {
1226 struct client *c = tty->client;
1227 u_int yy;
1228 char tmp[64];
1229
1230 log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py);
1231
1232 /* Nothing to clear. */
1233 if (nx == 0 || ny == 0)
1234 return;
1235
1236 /* If genuine BCE is available, can try escape sequences. */
1237 if (c->overlay_check == NULL && !tty_fake_bce(tty, defaults, bg)) {
1238 /* Use ED if clearing off the bottom of the terminal. */
1239 if (px == 0 &&
1240 px + nx >= tty->sx &&
1241 py + ny >= tty->sy &&
1242 tty_term_has(tty->term, TTYC_ED)) {
1243 tty_cursor(tty, 0, py);
1244 tty_putcode(tty, TTYC_ED);
1245 return;
1246 }
1247
1248 /*
1249 * On VT420 compatible terminals we can use DECFRA if the
1250 * background colour isn't default (because it doesn't work
1251 * after SGR 0).
1252 */
1253 if ((tty->term->flags & TERM_DECFRA) && !COLOUR_DEFAULT(bg)) {
1254 xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
1255 py + 1, px + 1, py + ny, px + nx);
1256 tty_puts(tty, tmp);
1257 return;
1258 }
1259
1260 /* Full lines can be scrolled away to clear them. */
1261 if (px == 0 &&
1262 px + nx >= tty->sx &&
1263 ny > 2 &&
1264 tty_term_has(tty->term, TTYC_CSR) &&
1265 tty_term_has(tty->term, TTYC_INDN)) {
1266 tty_region(tty, py, py + ny - 1);
1267 tty_margin_off(tty);
1268 tty_putcode_i(tty, TTYC_INDN, ny);
1269 return;
1270 }
1271
1272 /*
1273 * If margins are supported, can just scroll the area off to
1274 * clear it.
1275 */
1276 if (nx > 2 &&
1277 ny > 2 &&
1278 tty_term_has(tty->term, TTYC_CSR) &&
1279 tty_use_margin(tty) &&
1280 tty_term_has(tty->term, TTYC_INDN)) {
1281 tty_region(tty, py, py + ny - 1);
1282 tty_margin(tty, px, px + nx - 1);
1283 tty_putcode_i(tty, TTYC_INDN, ny);
1284 return;
1285 }
1286 }
1287
1288 /* Couldn't use an escape sequence, loop over the lines. */
1289 for (yy = py; yy < py + ny; yy++)
1290 tty_clear_line(tty, defaults, yy, px, nx, bg);
1291 }
1292
1293 /* Clear an area in a pane. */
1294 static void
1295 tty_clear_pane_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1296 u_int ny, u_int px, u_int nx, u_int bg)
1297 {
1298 u_int i, j, x, y, rx, ry;
1299
1300 if (tty_clamp_area(tty, ctx, px, py, nx, ny, &i, &j, &x, &y, &rx, &ry))
1301 tty_clear_area(tty, &ctx->defaults, y, ry, x, rx, bg);
1302 }
1303
1304 static void
1305 tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
1306 {
1307 struct screen *s = ctx->s;
1308 u_int nx = ctx->sx, i, x, rx, ry;
1309
1310 log_debug("%s: %s %u %d", __func__, tty->client->name, py, ctx->bigger);
1311
1312 if (!ctx->bigger) {
1313 tty_draw_line(tty, s, 0, py, nx, ctx->xoff, ctx->yoff + py,
1314 &ctx->defaults, ctx->palette);
1315 return;
1316 }
1317 if (tty_clamp_line(tty, ctx, 0, py, nx, &i, &x, &rx, &ry)) {
1318 tty_draw_line(tty, s, i, py, rx, x, ry, &ctx->defaults,
1319 ctx->palette);
1320 }
1321 }
1322
1323 static const struct grid_cell *
1324 tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
1325 {
1326 static struct grid_cell new;
1327 int c;
1328
1329 /* Characters less than 0x7f are always fine, no matter what. */
1330 if (gc->data.size == 1 && *gc->data.data < 0x7f)
1331 return (gc);
1332
1333 /* UTF-8 terminal and a UTF-8 character - fine. */
1334 if (tty->client->flags & CLIENT_UTF8)
1335 return (gc);
1336 memcpy(&new, gc, sizeof new);
1337
1338 /* See if this can be mapped to an ACS character. */
1339 c = tty_acs_reverse_get(tty, gc->data.data, gc->data.size);
1340 if (c != -1) {
1341 utf8_set(&new.data, c);
1342 new.attr |= GRID_ATTR_CHARSET;
1343 return (&new);
1344 }
1345
1346 /* Replace by the right number of underscores. */
1347 new.data.size = gc->data.width;
1348 if (new.data.size > UTF8_SIZE)
1349 new.data.size = UTF8_SIZE;
1350 memset(new.data.data, '_', new.data.size);
1351 return (&new);
1352 }
1353
1354 /*
1355 * Check if a single character is obstructed by the overlay and return a
1356 * boolean.
1357 */
1358 static int
1359 tty_check_overlay(struct tty *tty, u_int px, u_int py)
1360 {
1361 struct overlay_ranges r;
1362
1363 /*
1364 * A unit width range will always return nx[2] == 0 from a check, even
1365 * with multiple overlays, so it's sufficient to check just the first
1366 * two entries.
1367 */
1368 tty_check_overlay_range(tty, px, py, 1, &r);
1369 if (r.nx[0] + r.nx[1] == 0)
1370 return (0);
1371 return (1);
1372 }
1373
1374 /* Return parts of the input range which are visible. */
1375 static void
1376 tty_check_overlay_range(struct tty *tty, u_int px, u_int py, u_int nx,
1377 struct overlay_ranges *r)
1378 {
1379 struct client *c = tty->client;
1380
1381 if (c->overlay_check == NULL) {
1382 r->px[0] = px;
1383 r->nx[0] = nx;
1384 r->px[1] = 0;
1385 r->nx[1] = 0;
1386 r->px[2] = 0;
1387 r->nx[2] = 0;
1388 return;
1389 }
1390
1391 c->overlay_check(c, c->overlay_data, px, py, nx, r);
1392 }
1393
1394 void
1395 tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
1396 u_int atx, u_int aty, const struct grid_cell *defaults,
1397 struct colour_palette *palette)
1398 {
1399 struct grid *gd = s->grid;
1400 struct grid_cell gc, last;
1401 const struct grid_cell *gcp;
1402 struct grid_line *gl;
1403 struct client *c = tty->client;
1404 struct overlay_ranges r;
1405 u_int i, j, ux, sx, width, hidden, eux, nxx;
1406 u_int cellsize;
1407 int flags, cleared = 0, wrapped = 0;
1408 char buf[512];
1409 size_t len;
1410
1411 log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__,
1412 px, py, nx, atx, aty);
1413 log_debug("%s: defaults: fg=%d, bg=%d", __func__, defaults->fg,
1414 defaults->bg);
1415
1416 /*
1417 * py is the line in the screen to draw.
1418 * px is the start x and nx is the width to draw.
1419 * atx,aty is the line on the terminal to draw it.
1420 */
1421
1422 flags = (tty->flags & TTY_NOCURSOR);
1423 tty->flags |= TTY_NOCURSOR;
1424 tty_update_mode(tty, tty->mode, s);
1425
1426 tty_region_off(tty);
1427 tty_margin_off(tty);
1428
1429 /*
1430 * Clamp the width to cellsize - note this is not cellused, because
1431 * there may be empty background cells after it (from BCE).
1432 */
1433 sx = screen_size_x(s);
1434 if (nx > sx)
1435 nx = sx;
1436 cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
1437 if (sx > cellsize)
1438 sx = cellsize;
1439 if (sx > tty->sx)
1440 sx = tty->sx;
1441 if (sx > nx)
1442 sx = nx;
1443 ux = 0;
1444
1445 if (py == 0)
1446 gl = NULL;
1447 else
1448 gl = grid_get_line(gd, gd->hsize + py - 1);
1449 if (gl == NULL ||
1450 (~gl->flags & GRID_LINE_WRAPPED) ||
1451 atx != 0 ||
1452 tty->cx < tty->sx ||
1453 nx < tty->sx) {
1454 if (nx < tty->sx &&
1455 atx == 0 &&
1456 px + sx != nx &&
1457 tty_term_has(tty->term, TTYC_EL1) &&
1458 !tty_fake_bce(tty, defaults, 8) &&
1459 c->overlay_check == NULL) {
1460 tty_default_attributes(tty, defaults, palette, 8,
1461 s->hyperlinks);
1462 tty_cursor(tty, nx - 1, aty);
1463 tty_putcode(tty, TTYC_EL1);
1464 cleared = 1;
1465 }
1466 } else {
1467 log_debug("%s: wrapped line %u", __func__, aty);
1468 wrapped = 1;
1469 }
1470
1471 memcpy(&last, &grid_default_cell, sizeof last);
1472 len = 0;
1473 width = 0;
1474
1475 for (i = 0; i < sx; i++) {
1476 grid_view_get_cell(gd, px + i, py, &gc);
1477 gcp = tty_check_codeset(tty, &gc);
1478 if (len != 0 &&
1479 (!tty_check_overlay(tty, atx + ux + width, aty) ||
1480 (gcp->attr & GRID_ATTR_CHARSET) ||
1481 gcp->flags != last.flags ||
1482 gcp->attr != last.attr ||
1483 gcp->fg != last.fg ||
1484 gcp->bg != last.bg ||
1485 gcp->us != last.us ||
1486 gcp->link != last.link ||
1487 ux + width + gcp->data.width > nx ||
1488 (sizeof buf) - len < gcp->data.size)) {
1489 tty_attributes(tty, &last, defaults, palette,
1490 s->hyperlinks);
1491 if (last.flags & GRID_FLAG_CLEARED) {
1492 log_debug("%s: %zu cleared", __func__, len);
1493 tty_clear_line(tty, defaults, aty, atx + ux,
1494 width, last.bg);
1495 } else {
1496 if (!wrapped || atx != 0 || ux != 0)
1497 tty_cursor(tty, atx + ux, aty);
1498 tty_putn(tty, buf, len, width);
1499 }
1500 ux += width;
1501
1502 len = 0;
1503 width = 0;
1504 wrapped = 0;
1505 }
1506
1507 if (gcp->flags & GRID_FLAG_SELECTED)
1508 screen_select_cell(s, &last, gcp);
1509 else
1510 memcpy(&last, gcp, sizeof last);
1511
1512 tty_check_overlay_range(tty, atx + ux, aty, gcp->data.width,
1513 &r);
1514 hidden = 0;
1515 for (j = 0; j < OVERLAY_MAX_RANGES; j++)
1516 hidden += r.nx[j];
1517 hidden = gcp->data.width - hidden;
1518 if (hidden != 0 && hidden == gcp->data.width) {
1519 if (~gcp->flags & GRID_FLAG_PADDING)
1520 ux += gcp->data.width;
1521 } else if (hidden != 0 || ux + gcp->data.width > nx) {
1522 if (~gcp->flags & GRID_FLAG_PADDING) {
1523 tty_attributes(tty, &last, defaults, palette,
1524 s->hyperlinks);
1525 for (j = 0; j < OVERLAY_MAX_RANGES; j++) {
1526 if (r.nx[j] == 0)
1527 continue;
1528 /* Effective width drawn so far. */
1529 eux = r.px[j] - atx;
1530 if (eux < nx) {
1531 tty_cursor(tty, r.px[j], aty);
1532 nxx = nx - eux;
1533 if (r.nx[j] > nxx)
1534 r.nx[j] = nxx;
1535 tty_repeat_space(tty, r.nx[j]);
1536 ux = eux + r.nx[j];
1537 }
1538 }
1539 }
1540 } else if (gcp->attr & GRID_ATTR_CHARSET) {
1541 tty_attributes(tty, &last, defaults, palette,
1542 s->hyperlinks);
1543 tty_cursor(tty, atx + ux, aty);
1544 for (j = 0; j < gcp->data.size; j++)
1545 tty_putc(tty, gcp->data.data[j]);
1546 ux += gcp->data.width;
1547 } else if (~gcp->flags & GRID_FLAG_PADDING) {
1548 memcpy(buf + len, gcp->data.data, gcp->data.size);
1549 len += gcp->data.size;
1550 width += gcp->data.width;
1551 }
1552 }
1553 if (len != 0 && ((~last.flags & GRID_FLAG_CLEARED) || last.bg != 8)) {
1554 tty_attributes(tty, &last, defaults, palette, s->hyperlinks);
1555 if (last.flags & GRID_FLAG_CLEARED) {
1556 log_debug("%s: %zu cleared (end)", __func__, len);
1557 tty_clear_line(tty, defaults, aty, atx + ux, width,
1558 last.bg);
1559 } else {
1560 if (!wrapped || atx != 0 || ux != 0)
1561 tty_cursor(tty, atx + ux, aty);
1562 tty_putn(tty, buf, len, width);
1563 }
1564 ux += width;
1565 }
1566
1567 if (!cleared && ux < nx) {
1568 log_debug("%s: %u to end of line (%zu cleared)", __func__,
1569 nx - ux, len);
1570 tty_default_attributes(tty, defaults, palette, 8,
1571 s->hyperlinks);
1572 tty_clear_line(tty, defaults, aty, atx + ux, nx - ux, 8);
1573 }
1574
1575 tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags;
1576 tty_update_mode(tty, tty->mode, s);
1577 }
1578
1579 void
1580 tty_sync_start(struct tty *tty)
1581 {
1582 if (tty->flags & TTY_BLOCK)
1583 return;
1584 if (tty->flags & TTY_SYNCING)
1585 return;
1586 tty->flags |= TTY_SYNCING;
1587
1588 if (tty_term_has(tty->term, TTYC_SYNC)) {
1589 log_debug("%s sync start", tty->client->name);
1590 tty_putcode_i(tty, TTYC_SYNC, 1);
1591 }
1592 }
1593
1594 void
1595 tty_sync_end(struct tty *tty)
1596 {
1597 if (tty->flags & TTY_BLOCK)
1598 return;
1599 if (~tty->flags & TTY_SYNCING)
1600 return;
1601 tty->flags &= ~TTY_SYNCING;
1602
1603 if (tty_term_has(tty->term, TTYC_SYNC)) {
1604 log_debug("%s sync end", tty->client->name);
1605 tty_putcode_i(tty, TTYC_SYNC, 2);
1606 }
1607 }
1608
1609 static int
1610 tty_client_ready(const struct tty_ctx *ctx, struct client *c)
1611 {
1612 if (c->session == NULL || c->tty.term == NULL)
1613 return (0);
1614 if (c->flags & CLIENT_SUSPENDED)
1615 return (0);
1616
1617 /*
1618 * If invisible panes are allowed (used for passthrough), don't care if
1619 * redrawing or frozen.
1620 */
1621 if (ctx->allow_invisible_panes)
1622 return (1);
1623
1624 if (c->flags & CLIENT_REDRAWWINDOW)
1625 return (0);
1626 if (c->tty.flags & TTY_FREEZE)
1627 return (0);
1628 return (1);
1629 }
1630
1631 void
1632 tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
1633 struct tty_ctx *ctx)
1634 {
1635 struct client *c;
1636 int state;
1637
1638 if (ctx->set_client_cb == NULL)
1639 return;
1640 TAILQ_FOREACH(c, &clients, entry) {
1641 if (tty_client_ready(ctx, c)) {
1642 state = ctx->set_client_cb(ctx, c);
1643 if (state == -1)
1644 break;
1645 if (state == 0)
1646 continue;
1647 cmdfn(&c->tty, ctx);
1648 }
1649 }
1650 }
1651
1652 void
1653 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
1654 {
1655 struct client *c = tty->client;
1656
1657 if (ctx->bigger ||
1658 !tty_full_width(tty, ctx) ||
1659 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1660 (!tty_term_has(tty->term, TTYC_ICH) &&
1661 !tty_term_has(tty->term, TTYC_ICH1)) ||
1662 c->overlay_check != NULL) {
1663 tty_draw_pane(tty, ctx, ctx->ocy);
1664 return;
1665 }
1666
1667 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1668 ctx->s->hyperlinks);
1669
1670 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1671
1672 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
1673 }
1674
1675 void
1676 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
1677 {
1678 struct client *c = tty->client;
1679
1680 if (ctx->bigger ||
1681 !tty_full_width(tty, ctx) ||
1682 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1683 (!tty_term_has(tty->term, TTYC_DCH) &&
1684 !tty_term_has(tty->term, TTYC_DCH1)) ||
1685 c->overlay_check != NULL) {
1686 tty_draw_pane(tty, ctx, ctx->ocy);
1687 return;
1688 }
1689
1690 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1691 ctx->s->hyperlinks);
1692
1693 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1694
1695 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
1696 }
1697
1698 void
1699 tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx)
1700 {
1701 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1702 ctx->s->hyperlinks);
1703
1704 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, ctx->num, ctx->bg);
1705 }
1706
1707 void
1708 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
1709 {
1710 struct client *c = tty->client;
1711
1712 if (ctx->bigger ||
1713 !tty_full_width(tty, ctx) ||
1714 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1715 !tty_term_has(tty->term, TTYC_CSR) ||
1716 !tty_term_has(tty->term, TTYC_IL1) ||
1717 ctx->sx == 1 ||
1718 ctx->sy == 1 ||
1719 c->overlay_check != NULL) {
1720 tty_redraw_region(tty, ctx);
1721 return;
1722 }
1723
1724 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1725 ctx->s->hyperlinks);
1726
1727 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1728 tty_margin_off(tty);
1729 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1730
1731 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
1732 tty->cx = tty->cy = UINT_MAX;
1733 }
1734
1735 void
1736 tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
1737 {
1738 struct client *c = tty->client;
1739
1740 if (ctx->bigger ||
1741 !tty_full_width(tty, ctx) ||
1742 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1743 !tty_term_has(tty->term, TTYC_CSR) ||
1744 !tty_term_has(tty->term, TTYC_DL1) ||
1745 ctx->sx == 1 ||
1746 ctx->sy == 1 ||
1747 c->overlay_check != NULL) {
1748 tty_redraw_region(tty, ctx);
1749 return;
1750 }
1751
1752 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1753 ctx->s->hyperlinks);
1754
1755 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1756 tty_margin_off(tty);
1757 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1758
1759 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
1760 tty->cx = tty->cy = UINT_MAX;
1761 }
1762
1763 void
1764 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
1765 {
1766 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1767 ctx->s->hyperlinks);
1768
1769 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->sx, ctx->bg);
1770 }
1771
1772 void
1773 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
1774 {
1775 u_int nx = ctx->sx - ctx->ocx;
1776
1777 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1778 ctx->s->hyperlinks);
1779
1780 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, nx, ctx->bg);
1781 }
1782
1783 void
1784 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
1785 {
1786 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1787 ctx->s->hyperlinks);
1788
1789 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->ocx + 1, ctx->bg);
1790 }
1791
1792 void
1793 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
1794 {
1795 struct client *c = tty->client;
1796
1797 if (ctx->ocy != ctx->orupper)
1798 return;
1799
1800 if (ctx->bigger ||
1801 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1802 tty_fake_bce(tty, &ctx->defaults, 8) ||
1803 !tty_term_has(tty->term, TTYC_CSR) ||
1804 (!tty_term_has(tty->term, TTYC_RI) &&
1805 !tty_term_has(tty->term, TTYC_RIN)) ||
1806 ctx->sx == 1 ||
1807 ctx->sy == 1 ||
1808 c->overlay_check != NULL) {
1809 tty_redraw_region(tty, ctx);
1810 return;
1811 }
1812
1813 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1814 ctx->s->hyperlinks);
1815
1816 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1817 tty_margin_pane(tty, ctx);
1818 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1819
1820 if (tty_term_has(tty->term, TTYC_RI))
1821 tty_putcode(tty, TTYC_RI);
1822 else
1823 tty_putcode_i(tty, TTYC_RIN, 1);
1824 }
1825
1826 void
1827 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
1828 {
1829 struct client *c = tty->client;
1830
1831 if (ctx->ocy != ctx->orlower)
1832 return;
1833
1834 if (ctx->bigger ||
1835 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1836 tty_fake_bce(tty, &ctx->defaults, 8) ||
1837 !tty_term_has(tty->term, TTYC_CSR) ||
1838 ctx->sx == 1 ||
1839 ctx->sy == 1 ||
1840 c->overlay_check != NULL) {
1841 tty_redraw_region(tty, ctx);
1842 return;
1843 }
1844
1845 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1846 ctx->s->hyperlinks);
1847
1848 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1849 tty_margin_pane(tty, ctx);
1850
1851 /*
1852 * If we want to wrap a pane while using margins, the cursor needs to
1853 * be exactly on the right of the region. If the cursor is entirely off
1854 * the edge - move it back to the right. Some terminals are funny about
1855 * this and insert extra spaces, so only use the right if margins are
1856 * enabled.
1857 */
1858 if (ctx->xoff + ctx->ocx > tty->rright) {
1859 if (!tty_use_margin(tty))
1860 tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
1861 else
1862 tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
1863 } else
1864 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1865
1866 tty_putc(tty, '\n');
1867 }
1868
1869 void
1870 tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
1871 {
1872 struct client *c = tty->client;
1873 u_int i;
1874
1875 if (ctx->bigger ||
1876 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1877 tty_fake_bce(tty, &ctx->defaults, 8) ||
1878 !tty_term_has(tty->term, TTYC_CSR) ||
1879 ctx->sx == 1 ||
1880 ctx->sy == 1 ||
1881 c->overlay_check != NULL) {
1882 tty_redraw_region(tty, ctx);
1883 return;
1884 }
1885
1886 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1887 ctx->s->hyperlinks);
1888
1889 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1890 tty_margin_pane(tty, ctx);
1891
1892 if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
1893 if (!tty_use_margin(tty))
1894 tty_cursor(tty, 0, tty->rlower);
1895 else
1896 tty_cursor(tty, tty->rright, tty->rlower);
1897 for (i = 0; i < ctx->num; i++)
1898 tty_putc(tty, '\n');
1899 } else {
1900 if (tty->cy == UINT_MAX)
1901 tty_cursor(tty, 0, 0);
1902 else
1903 tty_cursor(tty, 0, tty->cy);
1904 tty_putcode_i(tty, TTYC_INDN, ctx->num);
1905 }
1906 }
1907
1908 void
1909 tty_cmd_scrolldown(struct tty *tty, const struct tty_ctx *ctx)
1910 {
1911 u_int i;
1912 struct client *c = tty->client;
1913
1914 if (ctx->bigger ||
1915 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1916 tty_fake_bce(tty, &ctx->defaults, 8) ||
1917 !tty_term_has(tty->term, TTYC_CSR) ||
1918 (!tty_term_has(tty->term, TTYC_RI) &&
1919 !tty_term_has(tty->term, TTYC_RIN)) ||
1920 ctx->sx == 1 ||
1921 ctx->sy == 1 ||
1922 c->overlay_check != NULL) {
1923 tty_redraw_region(tty, ctx);
1924 return;
1925 }
1926
1927 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1928 ctx->s->hyperlinks);
1929
1930 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1931 tty_margin_pane(tty, ctx);
1932 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1933
1934 if (tty_term_has(tty->term, TTYC_RIN))
1935 tty_putcode_i(tty, TTYC_RIN, ctx->num);
1936 else {
1937 for (i = 0; i < ctx->num; i++)
1938 tty_putcode(tty, TTYC_RI);
1939 }
1940 }
1941
1942 void
1943 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
1944 {
1945 u_int px, py, nx, ny;
1946
1947 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1948 ctx->s->hyperlinks);
1949
1950 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1951 tty_margin_off(tty);
1952
1953 px = 0;
1954 nx = ctx->sx;
1955 py = ctx->ocy + 1;
1956 ny = ctx->sy - ctx->ocy - 1;
1957
1958 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1959
1960 px = ctx->ocx;
1961 nx = ctx->sx - ctx->ocx;
1962 py = ctx->ocy;
1963
1964 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1965 }
1966
1967 void
1968 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
1969 {
1970 u_int px, py, nx, ny;
1971
1972 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1973 ctx->s->hyperlinks);
1974
1975 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1976 tty_margin_off(tty);
1977
1978 px = 0;
1979 nx = ctx->sx;
1980 py = 0;
1981 ny = ctx->ocy;
1982
1983 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1984
1985 px = 0;
1986 nx = ctx->ocx + 1;
1987 py = ctx->ocy;
1988
1989 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1990 }
1991
1992 void
1993 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
1994 {
1995 u_int px, py, nx, ny;
1996
1997 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg,
1998 ctx->s->hyperlinks);
1999
2000 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
2001 tty_margin_off(tty);
2002
2003 px = 0;
2004 nx = ctx->sx;
2005 py = 0;
2006 ny = ctx->sy;
2007
2008 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
2009 }
2010
2011 void
2012 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
2013 {
2014 u_int i, j;
2015
2016 if (ctx->bigger) {
2017 ctx->redraw_cb(ctx);
2018 return;
2019 }
2020
2021 tty_attributes(tty, &grid_default_cell, &ctx->defaults, ctx->palette,
2022 ctx->s->hyperlinks);
2023
2024 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
2025 tty_margin_off(tty);
2026
2027 for (j = 0; j < ctx->sy; j++) {
2028 tty_cursor_pane(tty, ctx, 0, j);
2029 for (i = 0; i < ctx->sx; i++)
2030 tty_putc(tty, 'E');
2031 }
2032 }
2033
2034 void
2035 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
2036 {
2037 const struct grid_cell *gcp = ctx->cell;
2038 struct screen *s = ctx->s;
2039 struct overlay_ranges r;
2040 u_int px, py, i, vis = 0;
2041
2042 px = ctx->xoff + ctx->ocx - ctx->wox;
2043 py = ctx->yoff + ctx->ocy - ctx->woy;
2044 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, 1, 1) ||
2045 (gcp->data.width == 1 && !tty_check_overlay(tty, px, py)))
2046 return;
2047
2048 /* Handle partially obstructed wide characters. */
2049 if (gcp->data.width > 1) {
2050 tty_check_overlay_range(tty, px, py, gcp->data.width, &r);
2051 for (i = 0; i < OVERLAY_MAX_RANGES; i++)
2052 vis += r.nx[i];
2053 if (vis < gcp->data.width) {
2054 tty_draw_line(tty, s, s->cx, s->cy, gcp->data.width,
2055 px, py, &ctx->defaults, ctx->palette);
2056 return;
2057 }
2058 }
2059
2060 if (ctx->xoff + ctx->ocx - ctx->wox > tty->sx - 1 &&
2061 ctx->ocy == ctx->orlower &&
2062 tty_full_width(tty, ctx))
2063 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
2064
2065 tty_margin_off(tty);
2066 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2067
2068 tty_cell(tty, ctx->cell, &ctx->defaults, ctx->palette,
2069 ctx->s->hyperlinks);
2070 }
2071
2072 void
2073 tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx)
2074 {
2075 struct overlay_ranges r;
2076 u_int i, px, py, cx;
2077 char *cp = ctx->ptr;
2078
2079 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, ctx->num, 1))
2080 return;
2081
2082 if (ctx->bigger &&
2083 (ctx->xoff + ctx->ocx < ctx->wox ||
2084 ctx->xoff + ctx->ocx + ctx->num > ctx->wox + ctx->wsx)) {
2085 if (!ctx->wrapped ||
2086 !tty_full_width(tty, ctx) ||
2087 (tty->term->flags & TERM_NOAM) ||
2088 ctx->xoff + ctx->ocx != 0 ||
2089 ctx->yoff + ctx->ocy != tty->cy + 1 ||
2090 tty->cx < tty->sx ||
2091 tty->cy == tty->rlower)
2092 tty_draw_pane(tty, ctx, ctx->ocy);
2093 else
2094 ctx->redraw_cb(ctx);
2095 return;
2096 }
2097
2098 tty_margin_off(tty);
2099 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
2100 tty_attributes(tty, ctx->cell, &ctx->defaults, ctx->palette, ctx->s->hyperlinks);
2101
2102 /* Get tty position from pane position for overlay check. */
2103 px = ctx->xoff + ctx->ocx - ctx->wox;
2104 py = ctx->yoff + ctx->ocy - ctx->woy;
2105
2106 tty_check_overlay_range(tty, px, py, ctx->num, &r);
2107 for (i = 0; i < OVERLAY_MAX_RANGES; i++) {
2108 if (r.nx[i] == 0)
2109 continue;
2110 /* Convert back to pane position for printing. */
2111 cx = r.px[i] - ctx->xoff + ctx->wox;
2112 tty_cursor_pane_unless_wrap(tty, ctx, cx, ctx->ocy);
2113 tty_putn(tty, cp + r.px[i] - px, r.nx[i], r.nx[i]);
2114 }
2115 }
2116
2117 void
2118 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
2119 {
2120 tty_set_selection(tty, ctx->ptr2, ctx->ptr, ctx->num);
2121 }
2122
2123 void
2124 tty_set_selection(struct tty *tty, const char *flags, const char *buf,
2125 size_t len)
2126 {
2127 char *encoded;
2128 size_t size;
2129
2130 if (~tty->flags & TTY_STARTED)
2131 return;
2132 if (!tty_term_has(tty->term, TTYC_MS))
2133 return;
2134
2135 size = 4 * ((len + 2) / 3) + 1; /* storage for base64 */
2136 encoded = xmalloc(size);
2137
2138 b64_ntop(buf, len, encoded, size);
2139 tty->flags |= TTY_NOBLOCK;
2140 tty_putcode_ss(tty, TTYC_MS, flags, encoded);
2141
2142 free(encoded);
2143 }
2144
2145 void
2146 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
2147 {
2148 tty->flags |= TTY_NOBLOCK;
2149 tty_add(tty, ctx->ptr, ctx->num);
2150 tty_invalidate(tty);
2151 }
2152
2153 void
2154 tty_cmd_syncstart(struct tty *tty, const struct tty_ctx *ctx)
2155 {
2156 if (ctx->num == 0x11) {
2157 /*
2158 * This is an overlay and a command that moves the cursor so
2159 * start synchronized updates.
2160 */
2161 tty_sync_start(tty);
2162 } else if (~ctx->num & 0x10) {
2163 /*
2164 * This is a pane. If there is an overlay, always start;
2165 * otherwise, only if requested.
2166 */
2167 if (ctx->num || tty->client->overlay_draw != NULL)
2168 tty_sync_start(tty);
2169 }
2170 }
2171
2172 void
2173 tty_cell(struct tty *tty, const struct grid_cell *gc,
2174 const struct grid_cell *defaults, struct colour_palette *palette,
2175 struct hyperlinks *hl)
2176 {
2177 const struct grid_cell *gcp;
2178
2179 /* Skip last character if terminal is stupid. */
2180 if ((tty->term->flags & TERM_NOAM) &&
2181 tty->cy == tty->sy - 1 &&
2182 tty->cx == tty->sx - 1)
2183 return;
2184
2185 /* If this is a padding character, do nothing. */
2186 if (gc->flags & GRID_FLAG_PADDING)
2187 return;
2188
2189 /* Check the output codeset and apply attributes. */
2190 gcp = tty_check_codeset(tty, gc);
2191 tty_attributes(tty, gcp, defaults, palette, hl);
2192
2193 /* If it is a single character, write with putc to handle ACS. */
2194 if (gcp->data.size == 1) {
2195 tty_attributes(tty, gcp, defaults, palette, hl);
2196 if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f)
2197 return;
2198 tty_putc(tty, *gcp->data.data);
2199 return;
2200 }
2201
2202 /* Write the data. */
2203 tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width);
2204 }
2205
2206 void
2207 tty_reset(struct tty *tty)
2208 {
2209 struct grid_cell *gc = &tty->cell;
2210
2211 if (!grid_cells_equal(gc, &grid_default_cell)) {
2212 if (gc->link != 0)
2213 tty_putcode_ss(tty, TTYC_HLS, "", "");
2214 if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2215 tty_putcode(tty, TTYC_RMACS);
2216 tty_putcode(tty, TTYC_SGR0);
2217 memcpy(gc, &grid_default_cell, sizeof *gc);
2218 }
2219 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2220 }
2221
2222 static void
2223 tty_invalidate(struct tty *tty)
2224 {
2225 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
2226 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
2227
2228 tty->cx = tty->cy = UINT_MAX;
2229 tty->rupper = tty->rleft = UINT_MAX;
2230 tty->rlower = tty->rright = UINT_MAX;
2231
2232 if (tty->flags & TTY_STARTED) {
2233 if (tty_use_margin(tty))
2234 tty_putcode(tty, TTYC_ENMG);
2235 tty_putcode(tty, TTYC_SGR0);
2236
2237 tty->mode = ALL_MODES;
2238 tty_update_mode(tty, MODE_CURSOR, NULL);
2239
2240 tty_cursor(tty, 0, 0);
2241 tty_region_off(tty);
2242 tty_margin_off(tty);
2243 } else
2244 tty->mode = MODE_CURSOR;
2245 }
2246
2247 /* Turn off margin. */
2248 void
2249 tty_region_off(struct tty *tty)
2250 {
2251 tty_region(tty, 0, tty->sy - 1);
2252 }
2253
2254 /* Set region inside pane. */
2255 static void
2256 tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper,
2257 u_int rlower)
2258 {
2259 tty_region(tty, ctx->yoff + rupper - ctx->woy,
2260 ctx->yoff + rlower - ctx->woy);
2261 }
2262
2263 /* Set region at absolute position. */
2264 static void
2265 tty_region(struct tty *tty, u_int rupper, u_int rlower)
2266 {
2267 if (tty->rlower == rlower && tty->rupper == rupper)
2268 return;
2269 if (!tty_term_has(tty->term, TTYC_CSR))
2270 return;
2271
2272 tty->rupper = rupper;
2273 tty->rlower = rlower;
2274
2275 /*
2276 * Some terminals (such as PuTTY) do not correctly reset the cursor to
2277 * 0,0 if it is beyond the last column (they do not reset their wrap
2278 * flag so further output causes a line feed). As a workaround, do an
2279 * explicit move to 0 first.
2280 */
2281 if (tty->cx >= tty->sx) {
2282 if (tty->cy == UINT_MAX)
2283 tty_cursor(tty, 0, 0);
2284 else
2285 tty_cursor(tty, 0, tty->cy);
2286 }
2287
2288 tty_putcode_ii(tty, TTYC_CSR, tty->rupper, tty->rlower);
2289 tty->cx = tty->cy = UINT_MAX;
2290 }
2291
2292 /* Turn off margin. */
2293 void
2294 tty_margin_off(struct tty *tty)
2295 {
2296 tty_margin(tty, 0, tty->sx - 1);
2297 }
2298
2299 /* Set margin inside pane. */
2300 static void
2301 tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx)
2302 {
2303 tty_margin(tty, ctx->xoff - ctx->wox,
2304 ctx->xoff + ctx->sx - 1 - ctx->wox);
2305 }
2306
2307 /* Set margin at absolute position. */
2308 static void
2309 tty_margin(struct tty *tty, u_int rleft, u_int rright)
2310 {
2311 if (!tty_use_margin(tty))
2312 return;
2313 if (tty->rleft == rleft && tty->rright == rright)
2314 return;
2315
2316 tty_putcode_ii(tty, TTYC_CSR, tty->rupper, tty->rlower);
2317
2318 tty->rleft = rleft;
2319 tty->rright = rright;
2320
2321 if (rleft == 0 && rright == tty->sx - 1)
2322 tty_putcode(tty, TTYC_CLMG);
2323 else
2324 tty_putcode_ii(tty, TTYC_CMG, rleft, rright);
2325 tty->cx = tty->cy = UINT_MAX;
2326 }
2327
2328 /*
2329 * Move the cursor, unless it would wrap itself when the next character is
2330 * printed.
2331 */
2332 static void
2333 tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx,
2334 u_int cx, u_int cy)
2335 {
2336 if (!ctx->wrapped ||
2337 !tty_full_width(tty, ctx) ||
2338 (tty->term->flags & TERM_NOAM) ||
2339 ctx->xoff + cx != 0 ||
2340 ctx->yoff + cy != tty->cy + 1 ||
2341 tty->cx < tty->sx ||
2342 tty->cy == tty->rlower)
2343 tty_cursor_pane(tty, ctx, cx, cy);
2344 else
2345 log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy);
2346 }
2347
2348 /* Move cursor inside pane. */
2349 static void
2350 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
2351 {
2352 tty_cursor(tty, ctx->xoff + cx - ctx->wox, ctx->yoff + cy - ctx->woy);
2353 }
2354
2355 /* Move cursor to absolute position. */
2356 void
2357 tty_cursor(struct tty *tty, u_int cx, u_int cy)
2358 {
2359 struct tty_term *term = tty->term;
2360 u_int thisx, thisy;
2361 int change;
2362
2363 if (tty->flags & TTY_BLOCK)
2364 return;
2365
2366 thisx = tty->cx;
2367 thisy = tty->cy;
2368
2369 /*
2370 * If in the automargin space, and want to be there, do not move.
2371 * Otherwise, force the cursor to be in range (and complain).
2372 */
2373 if (cx == thisx && cy == thisy && cx == tty->sx)
2374 return;
2375 if (cx > tty->sx - 1) {
2376 log_debug("%s: x too big %u > %u", __func__, cx, tty->sx - 1);
2377 cx = tty->sx - 1;
2378 }
2379
2380 /* No change. */
2381 if (cx == thisx && cy == thisy)
2382 return;
2383
2384 /* Currently at the very end of the line - use absolute movement. */
2385 if (thisx > tty->sx - 1)
2386 goto absolute;
2387
2388 /* Move to home position (0, 0). */
2389 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
2390 tty_putcode(tty, TTYC_HOME);
2391 goto out;
2392 }
2393
2394 /* Zero on the next line. */
2395 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower &&
2396 (!tty_use_margin(tty) || tty->rleft == 0)) {
2397 tty_putc(tty, '\r');
2398 tty_putc(tty, '\n');
2399 goto out;
2400 }
2401
2402 /* Moving column or row. */
2403 if (cy == thisy) {
2404 /*
2405 * Moving column only, row staying the same.
2406 */
2407
2408 /* To left edge. */
2409 if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) {
2410 tty_putc(tty, '\r');
2411 goto out;
2412 }
2413
2414 /* One to the left. */
2415 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
2416 tty_putcode(tty, TTYC_CUB1);
2417 goto out;
2418 }
2419
2420 /* One to the right. */
2421 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
2422 tty_putcode(tty, TTYC_CUF1);
2423 goto out;
2424 }
2425
2426 /* Calculate difference. */
2427 change = thisx - cx; /* +ve left, -ve right */
2428
2429 /*
2430 * Use HPA if change is larger than absolute, otherwise move
2431 * the cursor with CUB/CUF.
2432 */
2433 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
2434 tty_putcode_i(tty, TTYC_HPA, cx);
2435 goto out;
2436 } else if (change > 0 &&
2437 tty_term_has(term, TTYC_CUB) &&
2438 !tty_use_margin(tty)) {
2439 if (change == 2 && tty_term_has(term, TTYC_CUB1)) {
2440 tty_putcode(tty, TTYC_CUB1);
2441 tty_putcode(tty, TTYC_CUB1);
2442 goto out;
2443 }
2444 tty_putcode_i(tty, TTYC_CUB, change);
2445 goto out;
2446 } else if (change < 0 &&
2447 tty_term_has(term, TTYC_CUF) &&
2448 !tty_use_margin(tty)) {
2449 tty_putcode_i(tty, TTYC_CUF, -change);
2450 goto out;
2451 }
2452 } else if (cx == thisx) {
2453 /*
2454 * Moving row only, column staying the same.
2455 */
2456
2457 /* One above. */
2458 if (thisy != tty->rupper &&
2459 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
2460 tty_putcode(tty, TTYC_CUU1);
2461 goto out;
2462 }
2463
2464 /* One below. */
2465 if (thisy != tty->rlower &&
2466 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
2467 tty_putcode(tty, TTYC_CUD1);
2468 goto out;
2469 }
2470
2471 /* Calculate difference. */
2472 change = thisy - cy; /* +ve up, -ve down */
2473
2474 /*
2475 * Try to use VPA if change is larger than absolute or if this
2476 * change would cross the scroll region, otherwise use CUU/CUD.
2477 */
2478 if ((u_int) abs(change) > cy ||
2479 (change < 0 && cy - change > tty->rlower) ||
2480 (change > 0 && cy - change < tty->rupper)) {
2481 if (tty_term_has(term, TTYC_VPA)) {
2482 tty_putcode_i(tty, TTYC_VPA, cy);
2483 goto out;
2484 }
2485 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
2486 tty_putcode_i(tty, TTYC_CUU, change);
2487 goto out;
2488 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
2489 tty_putcode_i(tty, TTYC_CUD, -change);
2490 goto out;
2491 }
2492 }
2493
2494 absolute:
2495 /* Absolute movement. */
2496 tty_putcode_ii(tty, TTYC_CUP, cy, cx);
2497
2498 out:
2499 tty->cx = cx;
2500 tty->cy = cy;
2501 }
2502
2503 static void
2504 tty_hyperlink(struct tty *tty, const struct grid_cell *gc,
2505 struct hyperlinks *hl)
2506 {
2507 const char *uri, *id;
2508
2509 if (gc->link == tty->cell.link)
2510 return;
2511 tty->cell.link = gc->link;
2512
2513 if (hl == NULL)
2514 return;
2515
2516 if (gc->link == 0 || !hyperlinks_get(hl, gc->link, &uri, NULL, &id))
2517 tty_putcode_ss(tty, TTYC_HLS, "", "");
2518 else
2519 tty_putcode_ss(tty, TTYC_HLS, id, uri);
2520 }
2521
2522 void
2523 tty_attributes(struct tty *tty, const struct grid_cell *gc,
2524 const struct grid_cell *defaults, struct colour_palette *palette,
2525 struct hyperlinks *hl)
2526 {
2527 struct grid_cell *tc = &tty->cell, gc2;
2528 int changed;
2529
2530 /* Copy cell and update default colours. */
2531 memcpy(&gc2, gc, sizeof gc2);
2532 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2533 if (gc2.fg == 8)
2534 gc2.fg = defaults->fg;
2535 if (gc2.bg == 8)
2536 gc2.bg = defaults->bg;
2537 }
2538
2539 /* Ignore cell if it is the same as the last one. */
2540 if (gc2.attr == tty->last_cell.attr &&
2541 gc2.fg == tty->last_cell.fg &&
2542 gc2.bg == tty->last_cell.bg &&
2543 gc2.us == tty->last_cell.us &&
2544 gc2.link == tty->last_cell.link)
2545 return;
2546
2547 /*
2548 * If no setab, try to use the reverse attribute as a best-effort for a
2549 * non-default background. This is a bit of a hack but it doesn't do
2550 * any serious harm and makes a couple of applications happier.
2551 */
2552 if (!tty_term_has(tty->term, TTYC_SETAB)) {
2553 if (gc2.attr & GRID_ATTR_REVERSE) {
2554 if (gc2.fg != 7 && !COLOUR_DEFAULT(gc2.fg))
2555 gc2.attr &= ~GRID_ATTR_REVERSE;
2556 } else {
2557 if (gc2.bg != 0 && !COLOUR_DEFAULT(gc2.bg))
2558 gc2.attr |= GRID_ATTR_REVERSE;
2559 }
2560 }
2561
2562 /* Fix up the colours if necessary. */
2563 tty_check_fg(tty, palette, &gc2);
2564 tty_check_bg(tty, palette, &gc2);
2565 tty_check_us(tty, palette, &gc2);
2566
2567 /*
2568 * If any bits are being cleared or the underline colour is now default,
2569 * reset everything.
2570 */
2571 if ((tc->attr & ~gc2.attr) || (tc->us != gc2.us && gc2.us == 0))
2572 tty_reset(tty);
2573
2574 /*
2575 * Set the colours. This may call tty_reset() (so it comes next) and
2576 * may add to (NOT remove) the desired attributes.
2577 */
2578 tty_colours(tty, &gc2);
2579
2580 /* Filter out attribute bits already set. */
2581 changed = gc2.attr & ~tc->attr;
2582 tc->attr = gc2.attr;
2583
2584 /* Set the attributes. */
2585 if (changed & GRID_ATTR_BRIGHT)
2586 tty_putcode(tty, TTYC_BOLD);
2587 if (changed & GRID_ATTR_DIM)
2588 tty_putcode(tty, TTYC_DIM);
2589 if (changed & GRID_ATTR_ITALICS)
2590 tty_set_italics(tty);
2591 if (changed & GRID_ATTR_ALL_UNDERSCORE) {
2592 if ((changed & GRID_ATTR_UNDERSCORE) ||
2593 !tty_term_has(tty->term, TTYC_SMULX))
2594 tty_putcode(tty, TTYC_SMUL);
2595 else if (changed & GRID_ATTR_UNDERSCORE_2)
2596 tty_putcode_i(tty, TTYC_SMULX, 2);
2597 else if (changed & GRID_ATTR_UNDERSCORE_3)
2598 tty_putcode_i(tty, TTYC_SMULX, 3);
2599 else if (changed & GRID_ATTR_UNDERSCORE_4)
2600 tty_putcode_i(tty, TTYC_SMULX, 4);
2601 else if (changed & GRID_ATTR_UNDERSCORE_5)
2602 tty_putcode_i(tty, TTYC_SMULX, 5);
2603 }
2604 if (changed & GRID_ATTR_BLINK)
2605 tty_putcode(tty, TTYC_BLINK);
2606 if (changed & GRID_ATTR_REVERSE) {
2607 if (tty_term_has(tty->term, TTYC_REV))
2608 tty_putcode(tty, TTYC_REV);
2609 else if (tty_term_has(tty->term, TTYC_SMSO))
2610 tty_putcode(tty, TTYC_SMSO);
2611 }
2612 if (changed & GRID_ATTR_HIDDEN)
2613 tty_putcode(tty, TTYC_INVIS);
2614 if (changed & GRID_ATTR_STRIKETHROUGH)
2615 tty_putcode(tty, TTYC_SMXX);
2616 if (changed & GRID_ATTR_OVERLINE)
2617 tty_putcode(tty, TTYC_SMOL);
2618 if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2619 tty_putcode(tty, TTYC_SMACS);
2620
2621 /* Set hyperlink if any. */
2622 tty_hyperlink(tty, gc, hl);
2623
2624 memcpy(&tty->last_cell, &gc2, sizeof tty->last_cell);
2625 }
2626
2627 static void
2628 tty_colours(struct tty *tty, const struct grid_cell *gc)
2629 {
2630 struct grid_cell *tc = &tty->cell;
2631 int have_ax;
2632
2633 /* No changes? Nothing is necessary. */
2634 if (gc->fg == tc->fg && gc->bg == tc->bg && gc->us == tc->us)
2635 return;
2636
2637 /*
2638 * Is either the default colour? This is handled specially because the
2639 * best solution might be to reset both colours to default, in which
2640 * case if only one is default need to fall onward to set the other
2641 * colour.
2642 */
2643 if (COLOUR_DEFAULT(gc->fg) || COLOUR_DEFAULT(gc->bg)) {
2644 /*
2645 * If don't have AX but do have op, send sgr0 (op can't
2646 * actually be used because it is sometimes the same as sgr0
2647 * and sometimes isn't). This resets both colours to default.
2648 *
2649 * Otherwise, try to set the default colour only as needed.
2650 */
2651 have_ax = tty_term_flag(tty->term, TTYC_AX);
2652 if (!have_ax && tty_term_has(tty->term, TTYC_OP))
2653 tty_reset(tty);
2654 else {
2655 if (COLOUR_DEFAULT(gc->fg) && !COLOUR_DEFAULT(tc->fg)) {
2656 if (have_ax)
2657 tty_puts(tty, "\033[39m");
2658 else if (tc->fg != 7)
2659 tty_putcode_i(tty, TTYC_SETAF, 7);
2660 tc->fg = gc->fg;
2661 }
2662 if (COLOUR_DEFAULT(gc->bg) && !COLOUR_DEFAULT(tc->bg)) {
2663 if (have_ax)
2664 tty_puts(tty, "\033[49m");
2665 else if (tc->bg != 0)
2666 tty_putcode_i(tty, TTYC_SETAB, 0);
2667 tc->bg = gc->bg;
2668 }
2669 }
2670 }
2671
2672 /* Set the foreground colour. */
2673 if (!COLOUR_DEFAULT(gc->fg) && gc->fg != tc->fg)
2674 tty_colours_fg(tty, gc);
2675
2676 /*
2677 * Set the background colour. This must come after the foreground as
2678 * tty_colour_fg() can call tty_reset().
2679 */
2680 if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg)
2681 tty_colours_bg(tty, gc);
2682
2683 /* Set the underscore colour. */
2684 if (gc->us != tc->us)
2685 tty_colours_us(tty, gc);
2686 }
2687
2688 static void
2689 tty_check_fg(struct tty *tty, struct colour_palette *palette,
2690 struct grid_cell *gc)
2691 {
2692 u_char r, g, b;
2693 u_int colours;
2694 int c;
2695
2696 /*
2697 * Perform substitution if this pane has a palette. If the bright
2698 * attribute is set and Nobr is not present, use the bright entry in
2699 * the palette by changing to the aixterm colour
2700 */
2701 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2702 c = gc->fg;
2703 if (c < 8 &&
2704 gc->attr & GRID_ATTR_BRIGHT &&
2705 !tty_term_has(tty->term, TTYC_NOBR))
2706 c += 90;
2707 if ((c = colour_palette_get(palette, c)) != -1)
2708 gc->fg = c;
2709 }
2710
2711 /* Is this a 24-bit colour? */
2712 if (gc->fg & COLOUR_FLAG_RGB) {
2713 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2714 if (tty->term->flags & TERM_RGBCOLOURS)
2715 return;
2716 colour_split_rgb(gc->fg, &r, &g, &b);
2717 gc->fg = colour_find_rgb(r, g, b);
2718 }
2719
2720 /* How many colours does this terminal have? */
2721 if (tty->term->flags & TERM_256COLOURS)
2722 colours = 256;
2723 else
2724 colours = tty_term_number(tty->term, TTYC_COLORS);
2725
2726 /* Is this a 256-colour colour? */
2727 if (gc->fg & COLOUR_FLAG_256) {
2728 /* And not a 256 colour mode? */
2729 if (colours < 256) {
2730 gc->fg = colour_256to16(gc->fg);
2731 if (gc->fg & 8) {
2732 gc->fg &= 7;
2733 if (colours >= 16)
2734 gc->fg += 90;
2735 }
2736 }
2737 return;
2738 }
2739
2740 /* Is this an aixterm colour? */
2741 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
2742 gc->fg -= 90;
2743 gc->attr |= GRID_ATTR_BRIGHT;
2744 }
2745 }
2746
2747 static void
2748 tty_check_bg(struct tty *tty, struct colour_palette *palette,
2749 struct grid_cell *gc)
2750 {
2751 u_char r, g, b;
2752 u_int colours;
2753 int c;
2754
2755 /* Perform substitution if this pane has a palette. */
2756 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2757 if ((c = colour_palette_get(palette, gc->bg)) != -1)
2758 gc->bg = c;
2759 }
2760
2761 /* Is this a 24-bit colour? */
2762 if (gc->bg & COLOUR_FLAG_RGB) {
2763 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2764 if (tty->term->flags & TERM_RGBCOLOURS)
2765 return;
2766 colour_split_rgb(gc->bg, &r, &g, &b);
2767 gc->bg = colour_find_rgb(r, g, b);
2768 }
2769
2770 /* How many colours does this terminal have? */
2771 if (tty->term->flags & TERM_256COLOURS)
2772 colours = 256;
2773 else
2774 colours = tty_term_number(tty->term, TTYC_COLORS);
2775
2776 /* Is this a 256-colour colour? */
2777 if (gc->bg & COLOUR_FLAG_256) {
2778 /*
2779 * And not a 256 colour mode? Translate to 16-colour
2780 * palette. Bold background doesn't exist portably, so just
2781 * discard the bold bit if set.
2782 */
2783 if (colours < 256) {
2784 gc->bg = colour_256to16(gc->bg);
2785 if (gc->bg & 8) {
2786 gc->bg &= 7;
2787 if (colours >= 16)
2788 gc->bg += 90;
2789 }
2790 }
2791 return;
2792 }
2793
2794 /* Is this an aixterm colour? */
2795 if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
2796 gc->bg -= 90;
2797 }
2798
2799 static void
2800 tty_check_us(__unused struct tty *tty, struct colour_palette *palette,
2801 struct grid_cell *gc)
2802 {
2803 int c;
2804
2805 /* Perform substitution if this pane has a palette. */
2806 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2807 if ((c = colour_palette_get(palette, gc->us)) != -1)
2808 gc->us = c;
2809 }
2810
2811 /* Underscore colour is set as RGB so convert a 256 colour to RGB. */
2812 if (gc->us & COLOUR_FLAG_256)
2813 gc->us = colour_256toRGB (gc->us);
2814 }
2815
2816 static void
2817 tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
2818 {
2819 struct grid_cell *tc = &tty->cell;
2820 char s[32];
2821
2822 /* Is this a 24-bit or 256-colour colour? */
2823 if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
2824 if (tty_try_colour(tty, gc->fg, "38") == 0)
2825 goto save;
2826 /* Should not get here, already converted in tty_check_fg. */
2827 return;
2828 }
2829
2830 /* Is this an aixterm bright colour? */
2831 if (gc->fg >= 90 && gc->fg <= 97) {
2832 if (tty->term->flags & TERM_256COLOURS) {
2833 xsnprintf(s, sizeof s, "\033[%dm", gc->fg);
2834 tty_puts(tty, s);
2835 } else
2836 tty_putcode_i(tty, TTYC_SETAF, gc->fg - 90 + 8);
2837 goto save;
2838 }
2839
2840 /* Otherwise set the foreground colour. */
2841 tty_putcode_i(tty, TTYC_SETAF, gc->fg);
2842
2843 save:
2844 /* Save the new values in the terminal current cell. */
2845 tc->fg = gc->fg;
2846 }
2847
2848 static void
2849 tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
2850 {
2851 struct grid_cell *tc = &tty->cell;
2852 char s[32];
2853
2854 /* Is this a 24-bit or 256-colour colour? */
2855 if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
2856 if (tty_try_colour(tty, gc->bg, "48") == 0)
2857 goto save;
2858 /* Should not get here, already converted in tty_check_bg. */
2859 return;
2860 }
2861
2862 /* Is this an aixterm bright colour? */
2863 if (gc->bg >= 90 && gc->bg <= 97) {
2864 if (tty->term->flags & TERM_256COLOURS) {
2865 xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10);
2866 tty_puts(tty, s);
2867 } else
2868 tty_putcode_i(tty, TTYC_SETAB, gc->bg - 90 + 8);
2869 goto save;
2870 }
2871
2872 /* Otherwise set the background colour. */
2873 tty_putcode_i(tty, TTYC_SETAB, gc->bg);
2874
2875 save:
2876 /* Save the new values in the terminal current cell. */
2877 tc->bg = gc->bg;
2878 }
2879
2880 static void
2881 tty_colours_us(struct tty *tty, const struct grid_cell *gc)
2882 {
2883 struct grid_cell *tc = &tty->cell;
2884 u_int c;
2885 u_char r, g, b;
2886
2887 /* Clear underline colour. */
2888 if (gc->us == 0) {
2889 tty_putcode(tty, TTYC_OL);
2890 goto save;
2891 }
2892
2893 /* Must be an RGB colour - this should never happen. */
2894 if (~gc->us & COLOUR_FLAG_RGB)
2895 return;
2896
2897 /*
2898 * Setulc and setal follows the ncurses(3) one argument "direct colour"
2899 * capability format. Calculate the colour value.
2900 */
2901 colour_split_rgb(gc->us, &r, &g, &b);
2902 c = (65536 * r) + (256 * g) + b;
2903
2904 /*
2905 * Write the colour. Only use setal if the RGB flag is set because the
2906 * non-RGB version may be wrong.
2907 */
2908 if (tty_term_has(tty->term, TTYC_SETULC))
2909 tty_putcode_i(tty, TTYC_SETULC, c);
2910 else if (tty_term_has(tty->term, TTYC_SETAL) &&
2911 tty_term_has(tty->term, TTYC_RGB))
2912 tty_putcode_i(tty, TTYC_SETAL, c);
2913
2914 save:
2915 /* Save the new values in the terminal current cell. */
2916 tc->us = gc->us;
2917 }
2918
2919 static int
2920 tty_try_colour(struct tty *tty, int colour, const char *type)
2921 {
2922 u_char r, g, b;
2923
2924 if (colour & COLOUR_FLAG_256) {
2925 if (*type == '3' && tty_term_has(tty->term, TTYC_SETAF))
2926 tty_putcode_i(tty, TTYC_SETAF, colour & 0xff);
2927 else if (tty_term_has(tty->term, TTYC_SETAB))
2928 tty_putcode_i(tty, TTYC_SETAB, colour & 0xff);
2929 return (0);
2930 }
2931
2932 if (colour & COLOUR_FLAG_RGB) {
2933 colour_split_rgb(colour & 0xffffff, &r, &g, &b);
2934 if (*type == '3' && tty_term_has(tty->term, TTYC_SETRGBF))
2935 tty_putcode_iii(tty, TTYC_SETRGBF, r, g, b);
2936 else if (tty_term_has(tty->term, TTYC_SETRGBB))
2937 tty_putcode_iii(tty, TTYC_SETRGBB, r, g, b);
2938 return (0);
2939 }
2940
2941 return (-1);
2942 }
2943
2944 static void
2945 tty_window_default_style(struct grid_cell *gc, struct window_pane *wp)
2946 {
2947 memcpy(gc, &grid_default_cell, sizeof *gc);
2948 gc->fg = wp->palette.fg;
2949 gc->bg = wp->palette.bg;
2950 }
2951
2952 void
2953 tty_default_colours(struct grid_cell *gc, struct window_pane *wp)
2954 {
2955 struct options *oo = wp->options;
2956 struct format_tree *ft;
2957
2958 memcpy(gc, &grid_default_cell, sizeof *gc);
2959
2960 if (wp->flags & PANE_STYLECHANGED) {
2961 log_debug("%%%u: style changed", wp->id);
2962 wp->flags &= ~PANE_STYLECHANGED;
2963
2964 ft = format_create(NULL, NULL, FORMAT_PANE|wp->id,
2965 FORMAT_NOJOBS);
2966 format_defaults(ft, NULL, NULL, NULL, wp);
2967 tty_window_default_style(&wp->cached_active_gc, wp);
2968 style_add(&wp->cached_active_gc, oo, "window-active-style", ft);
2969 tty_window_default_style(&wp->cached_gc, wp);
2970 style_add(&wp->cached_gc, oo, "window-style", ft);
2971 format_free(ft);
2972 }
2973
2974 if (gc->fg == 8) {
2975 if (wp == wp->window->active && wp->cached_active_gc.fg != 8)
2976 gc->fg = wp->cached_active_gc.fg;
2977 else
2978 gc->fg = wp->cached_gc.fg;
2979 }
2980
2981 if (gc->bg == 8) {
2982 if (wp == wp->window->active && wp->cached_active_gc.bg != 8)
2983 gc->bg = wp->cached_active_gc.bg;
2984 else
2985 gc->bg = wp->cached_gc.bg;
2986 }
2987 }
2988
2989 static void
2990 tty_default_attributes(struct tty *tty, const struct grid_cell *defaults,
2991 struct colour_palette *palette, u_int bg, struct hyperlinks *hl)
2992 {
2993 struct grid_cell gc;
2994
2995 memcpy(&gc, &grid_default_cell, sizeof gc);
2996 gc.bg = bg;
2997 tty_attributes(tty, &gc, defaults, palette, hl);
2998 }
2999
3000 static void
3001 tty_clipboard_query_callback(__unused int fd, __unused short events, void *data)
3002 {
3003 struct tty *tty = data;
3004 struct client *c = tty->client;
3005
3006 c->flags &= ~CLIENT_CLIPBOARDBUFFER;
3007 free(c->clipboard_panes);
3008 c->clipboard_panes = NULL;
3009 c->clipboard_npanes = 0;
3010
3011 tty->flags &= ~TTY_OSC52QUERY;
3012 }
3013
3014 void
3015 tty_clipboard_query(struct tty *tty)
3016 {
3017 struct timeval tv = { .tv_sec = TTY_QUERY_TIMEOUT };
3018
3019 if ((~tty->flags & TTY_STARTED) || (tty->flags & TTY_OSC52QUERY))
3020 return;
3021 tty_putcode_ss(tty, TTYC_MS, "", "?");
3022
3023 tty->flags |= TTY_OSC52QUERY;
3024 evtimer_set(&tty->clipboard_timer, tty_clipboard_query_callback, tty);
3025 evtimer_add(&tty->clipboard_timer, &tv);
3026 }