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 *, const char *);
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 *, int *, struct grid_cell *);
49 static void tty_check_bg(struct tty *, int *, struct grid_cell *);
50 static void tty_check_us(struct tty *, int *, struct grid_cell *);
51 static void tty_colours_fg(struct tty *, const struct grid_cell *);
52 static void tty_colours_bg(struct tty *, const struct grid_cell *);
53 static void tty_colours_us(struct tty *, const struct grid_cell *);
54
55 static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int,
56 u_int);
57 static void tty_region(struct tty *, u_int, u_int);
58 static void tty_margin_pane(struct tty *, const struct tty_ctx *);
59 static void tty_margin(struct tty *, u_int, u_int);
60 static int tty_large_region(struct tty *, const struct tty_ctx *);
61 static int tty_fake_bce(const struct tty *, const struct grid_cell *,
62 u_int);
63 static void tty_redraw_region(struct tty *, const struct tty_ctx *);
64 static void tty_emulate_repeat(struct tty *, enum tty_code_code,
65 enum tty_code_code, u_int);
66 static void tty_repeat_space(struct tty *, u_int);
67 static void tty_draw_pane(struct tty *, const struct tty_ctx *, u_int);
68 static void tty_default_attributes(struct tty *, const struct grid_cell *,
69 int *, u_int);
70
71 #define tty_use_margin(tty) \
72 (tty->term->flags & TERM_DECSLRM)
73 #define tty_full_width(tty, ctx) \
74 ((ctx)->xoff == 0 && (ctx)->sx >= (tty)->sx)
75
76 #define TTY_BLOCK_INTERVAL (100000 /* 100 milliseconds */)
77 #define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8)
78 #define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8)
79
80 void
tty_create_log(void)81 tty_create_log(void)
82 {
83 char name[64];
84
85 xsnprintf(name, sizeof name, "tmux-out-%ld.log", (long)getpid());
86
87 tty_log_fd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
88 if (tty_log_fd != -1 && fcntl(tty_log_fd, F_SETFD, FD_CLOEXEC) == -1)
89 fatal("fcntl failed");
90 }
91
92 int
tty_init(struct tty * tty,struct client * c)93 tty_init(struct tty *tty, struct client *c)
94 {
95 if (!isatty(c->fd))
96 return (-1);
97
98 memset(tty, 0, sizeof *tty);
99 tty->client = c;
100
101 tty->cstyle = 0;
102 tty->ccolour = xstrdup("");
103
104 if (tcgetattr(c->fd, &tty->tio) != 0)
105 return (-1);
106 return (0);
107 }
108
109 void
tty_resize(struct tty * tty)110 tty_resize(struct tty *tty)
111 {
112 struct client *c = tty->client;
113 struct winsize ws;
114 u_int sx, sy, xpixel, ypixel;
115
116 if (ioctl(c->fd, TIOCGWINSZ, &ws) != -1) {
117 sx = ws.ws_col;
118 if (sx == 0) {
119 sx = 80;
120 xpixel = 0;
121 } else
122 xpixel = ws.ws_xpixel / sx;
123 sy = ws.ws_row;
124 if (sy == 0) {
125 sy = 24;
126 ypixel = 0;
127 } else
128 ypixel = ws.ws_ypixel / sy;
129 } else {
130 sx = 80;
131 sy = 24;
132 xpixel = 0;
133 ypixel = 0;
134 }
135 log_debug("%s: %s now %ux%u (%ux%u)", __func__, c->name, sx, sy,
136 xpixel, ypixel);
137 tty_set_size(tty, sx, sy, xpixel, ypixel);
138 tty_invalidate(tty);
139 }
140
141 void
tty_set_size(struct tty * tty,u_int sx,u_int sy,u_int xpixel,u_int ypixel)142 tty_set_size(struct tty *tty, u_int sx, u_int sy, u_int xpixel, u_int ypixel)
143 {
144 tty->sx = sx;
145 tty->sy = sy;
146 tty->xpixel = xpixel;
147 tty->ypixel = ypixel;
148 }
149
150 static void
tty_read_callback(__unused int fd,__unused short events,void * data)151 tty_read_callback(__unused int fd, __unused short events, void *data)
152 {
153 struct tty *tty = data;
154 struct client *c = tty->client;
155 const char *name = c->name;
156 size_t size = EVBUFFER_LENGTH(tty->in);
157 int nread;
158
159 nread = evbuffer_read(tty->in, c->fd, -1);
160 if (nread == 0 || nread == -1) {
161 if (nread == 0)
162 log_debug("%s: read closed", name);
163 else
164 log_debug("%s: read error: %s", name, strerror(errno));
165 event_del(&tty->event_in);
166 server_client_lost(tty->client);
167 return;
168 }
169 log_debug("%s: read %d bytes (already %zu)", name, nread, size);
170
171 while (tty_keys_next(tty))
172 ;
173 }
174
175 static void
tty_timer_callback(__unused int fd,__unused short events,void * data)176 tty_timer_callback(__unused int fd, __unused short events, void *data)
177 {
178 struct tty *tty = data;
179 struct client *c = tty->client;
180 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
181
182 log_debug("%s: %zu discarded", c->name, tty->discarded);
183
184 c->flags |= CLIENT_ALLREDRAWFLAGS;
185 c->discarded += tty->discarded;
186
187 if (tty->discarded < TTY_BLOCK_STOP(tty)) {
188 tty->flags &= ~TTY_BLOCK;
189 tty_invalidate(tty);
190 return;
191 }
192 tty->discarded = 0;
193 evtimer_add(&tty->timer, &tv);
194 }
195
196 static int
tty_block_maybe(struct tty * tty)197 tty_block_maybe(struct tty *tty)
198 {
199 struct client *c = tty->client;
200 size_t size = EVBUFFER_LENGTH(tty->out);
201 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
202
203 if (size < TTY_BLOCK_START(tty))
204 return (0);
205
206 if (tty->flags & TTY_BLOCK)
207 return (1);
208 tty->flags |= TTY_BLOCK;
209
210 log_debug("%s: can't keep up, %zu discarded", c->name, size);
211
212 evbuffer_drain(tty->out, size);
213 c->discarded += size;
214
215 tty->discarded = 0;
216 evtimer_add(&tty->timer, &tv);
217 return (1);
218 }
219
220 static void
tty_write_callback(__unused int fd,__unused short events,void * data)221 tty_write_callback(__unused int fd, __unused short events, void *data)
222 {
223 struct tty *tty = data;
224 struct client *c = tty->client;
225 size_t size = EVBUFFER_LENGTH(tty->out);
226 int nwrite;
227
228 nwrite = evbuffer_write(tty->out, c->fd);
229 if (nwrite == -1)
230 return;
231 log_debug("%s: wrote %d bytes (of %zu)", c->name, nwrite, size);
232
233 if (c->redraw > 0) {
234 if ((size_t)nwrite >= c->redraw)
235 c->redraw = 0;
236 else
237 c->redraw -= nwrite;
238 log_debug("%s: waiting for redraw, %zu bytes left", c->name,
239 c->redraw);
240 } else if (tty_block_maybe(tty))
241 return;
242
243 if (EVBUFFER_LENGTH(tty->out) != 0)
244 event_add(&tty->event_out, NULL);
245 }
246
247 int
tty_open(struct tty * tty,char ** cause)248 tty_open(struct tty *tty, char **cause)
249 {
250 struct client *c = tty->client;
251
252 tty->term = tty_term_create(tty, c->term_name, c->term_caps,
253 c->term_ncaps, &c->term_features, cause);
254 if (tty->term == NULL) {
255 tty_close(tty);
256 return (-1);
257 }
258 tty->flags |= TTY_OPENED;
259
260 tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_BLOCK|TTY_TIMER);
261
262 event_set(&tty->event_in, c->fd, EV_PERSIST|EV_READ,
263 tty_read_callback, tty);
264 tty->in = evbuffer_new();
265 if (tty->in == NULL)
266 fatal("out of memory");
267
268 event_set(&tty->event_out, c->fd, EV_WRITE, tty_write_callback, tty);
269 tty->out = evbuffer_new();
270 if (tty->out == NULL)
271 fatal("out of memory");
272
273 evtimer_set(&tty->timer, tty_timer_callback, tty);
274
275 tty_start_tty(tty);
276
277 tty_keys_build(tty);
278
279 return (0);
280 }
281
282 static void
tty_start_timer_callback(__unused int fd,__unused short events,void * data)283 tty_start_timer_callback(__unused int fd, __unused short events, void *data)
284 {
285 struct tty *tty = data;
286 struct client *c = tty->client;
287
288 log_debug("%s: start timer fired", c->name);
289 if ((tty->flags & (TTY_HAVEDA|TTY_HAVEXDA)) == 0)
290 tty_update_features(tty);
291 tty->flags |= (TTY_HAVEDA|TTY_HAVEXDA);
292 }
293
294 void
tty_start_tty(struct tty * tty)295 tty_start_tty(struct tty *tty)
296 {
297 struct client *c = tty->client;
298 struct termios tio;
299 struct timeval tv = { .tv_sec = 1 };
300
301 setblocking(c->fd, 0);
302 event_add(&tty->event_in, NULL);
303
304 memcpy(&tio, &tty->tio, sizeof tio);
305 tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP);
306 tio.c_iflag |= IGNBRK;
307 tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET);
308 tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL|ECHOPRT|
309 ECHOKE|ISIG);
310 tio.c_cc[VMIN] = 1;
311 tio.c_cc[VTIME] = 0;
312 if (tcsetattr(c->fd, TCSANOW, &tio) == 0)
313 tcflush(c->fd, TCIOFLUSH);
314
315 tty_putcode(tty, TTYC_SMCUP);
316
317 tty_putcode(tty, TTYC_SMKX);
318 tty_putcode(tty, TTYC_CLEAR);
319
320 if (tty_acs_needed(tty)) {
321 log_debug("%s: using capabilities for ACS", c->name);
322 tty_putcode(tty, TTYC_ENACS);
323 } else
324 log_debug("%s: using UTF-8 for ACS", c->name);
325
326 tty_putcode(tty, TTYC_CNORM);
327 if (tty_term_has(tty->term, TTYC_KMOUS)) {
328 tty_puts(tty, "\033[?1000l\033[?1002l\033[?1003l");
329 tty_puts(tty, "\033[?1006l\033[?1005l");
330 }
331
332 evtimer_set(&tty->start_timer, tty_start_timer_callback, tty);
333 evtimer_add(&tty->start_timer, &tv);
334
335 tty->flags |= TTY_STARTED;
336 tty_invalidate(tty);
337
338 if (*tty->ccolour != '\0')
339 tty_force_cursor_colour(tty, "");
340
341 tty->mouse_drag_flag = 0;
342 tty->mouse_drag_update = NULL;
343 tty->mouse_drag_release = NULL;
344 }
345
346 void
tty_send_requests(struct tty * tty)347 tty_send_requests(struct tty *tty)
348 {
349 if (~tty->flags & TTY_STARTED)
350 return;
351
352 if (tty->term->flags & TERM_VT100LIKE) {
353 if (~tty->flags & TTY_HAVEDA)
354 tty_puts(tty, "\033[>c");
355 if (~tty->flags & TTY_HAVEXDA)
356 tty_puts(tty, "\033[>q");
357 } else
358 tty->flags |= (TTY_HAVEDA|TTY_HAVEXDA);
359 }
360
361 void
tty_stop_tty(struct tty * tty)362 tty_stop_tty(struct tty *tty)
363 {
364 struct client *c = tty->client;
365 struct winsize ws;
366
367 if (!(tty->flags & TTY_STARTED))
368 return;
369 tty->flags &= ~TTY_STARTED;
370
371 evtimer_del(&tty->start_timer);
372
373 event_del(&tty->timer);
374 tty->flags &= ~TTY_BLOCK;
375
376 event_del(&tty->event_in);
377 event_del(&tty->event_out);
378
379 /*
380 * Be flexible about error handling and try not kill the server just
381 * because the fd is invalid. Things like ssh -t can easily leave us
382 * with a dead tty.
383 */
384 if (ioctl(c->fd, TIOCGWINSZ, &ws) == -1)
385 return;
386 if (tcsetattr(c->fd, TCSANOW, &tty->tio) == -1)
387 return;
388
389 tty_raw(tty, tty_term_string2(tty->term, TTYC_CSR, 0, ws.ws_row - 1));
390 if (tty_acs_needed(tty))
391 tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
392 tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
393 tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
394 tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
395 if (tty_term_has(tty->term, TTYC_SS) && tty->cstyle != 0) {
396 if (tty_term_has(tty->term, TTYC_SE))
397 tty_raw(tty, tty_term_string(tty->term, TTYC_SE));
398 else
399 tty_raw(tty, tty_term_string1(tty->term, TTYC_SS, 0));
400 }
401 if (tty->mode & MODE_BRACKETPASTE)
402 tty_raw(tty, tty_term_string(tty->term, TTYC_DSBP));
403 if (*tty->ccolour != '\0')
404 tty_raw(tty, tty_term_string(tty->term, TTYC_CR));
405
406 tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
407 if (tty_term_has(tty->term, TTYC_KMOUS)) {
408 tty_raw(tty, "\033[?1000l\033[?1002l\033[?1003l");
409 tty_raw(tty, "\033[?1006l\033[?1005l");
410 }
411
412 if (tty->term->flags & TERM_VT100LIKE)
413 tty_raw(tty, "\033[?7727l");
414 tty_raw(tty, tty_term_string(tty->term, TTYC_DSFCS));
415 tty_raw(tty, tty_term_string(tty->term, TTYC_DSEKS));
416
417 if (tty_use_margin(tty))
418 tty_raw(tty, tty_term_string(tty->term, TTYC_DSMG));
419 tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
420
421 setblocking(c->fd, 1);
422 }
423
424 void
tty_close(struct tty * tty)425 tty_close(struct tty *tty)
426 {
427 if (event_initialized(&tty->key_timer))
428 evtimer_del(&tty->key_timer);
429 tty_stop_tty(tty);
430
431 if (tty->flags & TTY_OPENED) {
432 evbuffer_free(tty->in);
433 event_del(&tty->event_in);
434 evbuffer_free(tty->out);
435 event_del(&tty->event_out);
436
437 tty_term_free(tty->term);
438 tty_keys_free(tty);
439
440 tty->flags &= ~TTY_OPENED;
441 }
442 }
443
444 void
tty_free(struct tty * tty)445 tty_free(struct tty *tty)
446 {
447 tty_close(tty);
448 free(tty->ccolour);
449 }
450
451 void
tty_update_features(struct tty * tty)452 tty_update_features(struct tty *tty)
453 {
454 struct client *c = tty->client;
455
456 if (tty_apply_features(tty->term, c->term_features))
457 tty_term_apply_overrides(tty->term);
458
459 if (tty_use_margin(tty))
460 tty_putcode(tty, TTYC_ENMG);
461 if (options_get_number(global_options, "extended-keys"))
462 tty_puts(tty, tty_term_string(tty->term, TTYC_ENEKS));
463 if (options_get_number(global_options, "focus-events"))
464 tty_puts(tty, tty_term_string(tty->term, TTYC_ENFCS));
465 if (tty->term->flags & TERM_VT100LIKE)
466 tty_puts(tty, "\033[?7727h");
467 }
468
469 void
tty_raw(struct tty * tty,const char * s)470 tty_raw(struct tty *tty, const char *s)
471 {
472 struct client *c = tty->client;
473 ssize_t n, slen;
474 u_int i;
475
476 slen = strlen(s);
477 for (i = 0; i < 5; i++) {
478 n = write(c->fd, s, slen);
479 if (n >= 0) {
480 s += n;
481 slen -= n;
482 if (slen == 0)
483 break;
484 } else if (n == -1 && errno != EAGAIN)
485 break;
486 usleep(100);
487 }
488 }
489
490 void
tty_putcode(struct tty * tty,enum tty_code_code code)491 tty_putcode(struct tty *tty, enum tty_code_code code)
492 {
493 tty_puts(tty, tty_term_string(tty->term, code));
494 }
495
496 void
tty_putcode1(struct tty * tty,enum tty_code_code code,int a)497 tty_putcode1(struct tty *tty, enum tty_code_code code, int a)
498 {
499 if (a < 0)
500 return;
501 tty_puts(tty, tty_term_string1(tty->term, code, a));
502 }
503
504 void
tty_putcode2(struct tty * tty,enum tty_code_code code,int a,int b)505 tty_putcode2(struct tty *tty, enum tty_code_code code, int a, int b)
506 {
507 if (a < 0 || b < 0)
508 return;
509 tty_puts(tty, tty_term_string2(tty->term, code, a, b));
510 }
511
512 void
tty_putcode3(struct tty * tty,enum tty_code_code code,int a,int b,int c)513 tty_putcode3(struct tty *tty, enum tty_code_code code, int a, int b, int c)
514 {
515 if (a < 0 || b < 0 || c < 0)
516 return;
517 tty_puts(tty, tty_term_string3(tty->term, code, a, b, c));
518 }
519
520 void
tty_putcode_ptr1(struct tty * tty,enum tty_code_code code,const void * a)521 tty_putcode_ptr1(struct tty *tty, enum tty_code_code code, const void *a)
522 {
523 if (a != NULL)
524 tty_puts(tty, tty_term_ptr1(tty->term, code, a));
525 }
526
527 void
tty_putcode_ptr2(struct tty * tty,enum tty_code_code code,const void * a,const void * b)528 tty_putcode_ptr2(struct tty *tty, enum tty_code_code code, const void *a,
529 const void *b)
530 {
531 if (a != NULL && b != NULL)
532 tty_puts(tty, tty_term_ptr2(tty->term, code, a, b));
533 }
534
535 static void
tty_add(struct tty * tty,const char * buf,size_t len)536 tty_add(struct tty *tty, const char *buf, size_t len)
537 {
538 struct client *c = tty->client;
539
540 if (tty->flags & TTY_BLOCK) {
541 tty->discarded += len;
542 return;
543 }
544
545 evbuffer_add(tty->out, buf, len);
546 log_debug("%s: %.*s", c->name, (int)len, buf);
547 c->written += len;
548
549 if (tty_log_fd != -1)
550 write(tty_log_fd, buf, len);
551 if (tty->flags & TTY_STARTED)
552 event_add(&tty->event_out, NULL);
553 }
554
555 void
tty_puts(struct tty * tty,const char * s)556 tty_puts(struct tty *tty, const char *s)
557 {
558 if (*s != '\0')
559 tty_add(tty, s, strlen(s));
560 }
561
562 void
tty_putc(struct tty * tty,u_char ch)563 tty_putc(struct tty *tty, u_char ch)
564 {
565 const char *acs;
566
567 if ((tty->term->flags & TERM_NOAM) &&
568 ch >= 0x20 && ch != 0x7f &&
569 tty->cy == tty->sy - 1 &&
570 tty->cx + 1 >= tty->sx)
571 return;
572
573 if (tty->cell.attr & GRID_ATTR_CHARSET) {
574 acs = tty_acs_get(tty, ch);
575 if (acs != NULL)
576 tty_add(tty, acs, strlen(acs));
577 else
578 tty_add(tty, &ch, 1);
579 } else
580 tty_add(tty, &ch, 1);
581
582 if (ch >= 0x20 && ch != 0x7f) {
583 if (tty->cx >= tty->sx) {
584 tty->cx = 1;
585 if (tty->cy != tty->rlower)
586 tty->cy++;
587
588 /*
589 * On !am terminals, force the cursor position to where
590 * we think it should be after a line wrap - this means
591 * it works on sensible terminals as well.
592 */
593 if (tty->term->flags & TERM_NOAM)
594 tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx);
595 } else
596 tty->cx++;
597 }
598 }
599
600 void
tty_putn(struct tty * tty,const void * buf,size_t len,u_int width)601 tty_putn(struct tty *tty, const void *buf, size_t len, u_int width)
602 {
603 if ((tty->term->flags & TERM_NOAM) &&
604 tty->cy == tty->sy - 1 &&
605 tty->cx + len >= tty->sx)
606 len = tty->sx - tty->cx - 1;
607
608 tty_add(tty, buf, len);
609 if (tty->cx + width > tty->sx) {
610 tty->cx = (tty->cx + width) - tty->sx;
611 if (tty->cx <= tty->sx)
612 tty->cy++;
613 else
614 tty->cx = tty->cy = UINT_MAX;
615 } else
616 tty->cx += width;
617 }
618
619 static void
tty_set_italics(struct tty * tty)620 tty_set_italics(struct tty *tty)
621 {
622 const char *s;
623
624 if (tty_term_has(tty->term, TTYC_SITM)) {
625 s = options_get_string(global_options, "default-terminal");
626 if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) {
627 tty_putcode(tty, TTYC_SITM);
628 return;
629 }
630 }
631 tty_putcode(tty, TTYC_SMSO);
632 }
633
634 void
tty_set_title(struct tty * tty,const char * title)635 tty_set_title(struct tty *tty, const char *title)
636 {
637 if (!tty_term_has(tty->term, TTYC_TSL) ||
638 !tty_term_has(tty->term, TTYC_FSL))
639 return;
640
641 tty_putcode(tty, TTYC_TSL);
642 tty_puts(tty, title);
643 tty_putcode(tty, TTYC_FSL);
644 }
645
646 static void
tty_force_cursor_colour(struct tty * tty,const char * ccolour)647 tty_force_cursor_colour(struct tty *tty, const char *ccolour)
648 {
649 if (*ccolour == '\0')
650 tty_putcode(tty, TTYC_CR);
651 else
652 tty_putcode_ptr1(tty, TTYC_CS, ccolour);
653 free(tty->ccolour);
654 tty->ccolour = xstrdup(ccolour);
655 }
656
657 void
tty_update_mode(struct tty * tty,int mode,struct screen * s)658 tty_update_mode(struct tty *tty, int mode, struct screen *s)
659 {
660 struct client *c = tty->client;
661 int changed;
662
663 if (s != NULL && strcmp(s->ccolour, tty->ccolour) != 0)
664 tty_force_cursor_colour(tty, s->ccolour);
665
666 if (tty->flags & TTY_NOCURSOR)
667 mode &= ~MODE_CURSOR;
668
669 changed = mode ^ tty->mode;
670 if (changed != 0)
671 log_debug("%s: update mode %x to %x", c->name, tty->mode, mode);
672
673 /*
674 * The cursor blinking flag can be reset by setting the cursor style, so
675 * set the style first.
676 */
677 if (s != NULL && tty->cstyle != s->cstyle) {
678 if (tty_term_has(tty->term, TTYC_SS)) {
679 if (s->cstyle == 0 && tty_term_has(tty->term, TTYC_SE))
680 tty_putcode(tty, TTYC_SE);
681 else
682 tty_putcode1(tty, TTYC_SS, s->cstyle);
683 }
684 tty->cstyle = s->cstyle;
685 changed |= (MODE_CURSOR|MODE_BLINKING);
686 }
687
688 /*
689 * Cursor invisible (RM ?25) overrides cursor blinking (SM ?12 or RM
690 * 34), and we need to be careful not send cnorm after cvvis since it
691 * can undo it.
692 */
693 if (changed & (MODE_CURSOR|MODE_BLINKING)) {
694 log_debug("%s: cursor %s, %sblinking", __func__,
695 (mode & MODE_CURSOR) ? "on" : "off",
696 (mode & MODE_BLINKING) ? "" : "not ");
697 if (~mode & MODE_CURSOR)
698 tty_putcode(tty, TTYC_CIVIS);
699 else if (mode & MODE_BLINKING) {
700 tty_putcode(tty, TTYC_CNORM);
701 if (tty_term_has(tty->term, TTYC_CVVIS))
702 tty_putcode(tty, TTYC_CVVIS);
703 } else
704 tty_putcode(tty, TTYC_CNORM);
705 }
706
707 if ((changed & ALL_MOUSE_MODES) &&
708 tty_term_has(tty->term, TTYC_KMOUS)) {
709 /*
710 * If the mouse modes have changed, clear any that are set and
711 * apply again. There are differences in how terminals track
712 * the various bits.
713 */
714 if (tty->mode & MODE_MOUSE_SGR)
715 tty_puts(tty, "\033[?1006l");
716 if (tty->mode & MODE_MOUSE_STANDARD)
717 tty_puts(tty, "\033[?1000l");
718 if (tty->mode & MODE_MOUSE_BUTTON)
719 tty_puts(tty, "\033[?1002l");
720 if (tty->mode & MODE_MOUSE_ALL)
721 tty_puts(tty, "\033[?1003l");
722 if (mode & ALL_MOUSE_MODES)
723 tty_puts(tty, "\033[?1006h");
724 if (mode & MODE_MOUSE_STANDARD)
725 tty_puts(tty, "\033[?1000h");
726 if (mode & MODE_MOUSE_BUTTON)
727 tty_puts(tty, "\033[?1002h");
728 if (mode & MODE_MOUSE_ALL)
729 tty_puts(tty, "\033[?1003h");
730 }
731 if (changed & MODE_BRACKETPASTE) {
732 if (mode & MODE_BRACKETPASTE)
733 tty_putcode(tty, TTYC_ENBP);
734 else
735 tty_putcode(tty, TTYC_DSBP);
736 }
737 tty->mode = mode;
738 }
739
740 static void
tty_emulate_repeat(struct tty * tty,enum tty_code_code code,enum tty_code_code code1,u_int n)741 tty_emulate_repeat(struct tty *tty, enum tty_code_code code,
742 enum tty_code_code code1, u_int n)
743 {
744 if (tty_term_has(tty->term, code))
745 tty_putcode1(tty, code, n);
746 else {
747 while (n-- > 0)
748 tty_putcode(tty, code1);
749 }
750 }
751
752 static void
tty_repeat_space(struct tty * tty,u_int n)753 tty_repeat_space(struct tty *tty, u_int n)
754 {
755 static char s[500];
756
757 if (*s != ' ')
758 memset(s, ' ', sizeof s);
759
760 while (n > sizeof s) {
761 tty_putn(tty, s, sizeof s, sizeof s);
762 n -= sizeof s;
763 }
764 if (n != 0)
765 tty_putn(tty, s, n, n);
766 }
767
768 /* Is this window bigger than the terminal? */
769 int
tty_window_bigger(struct tty * tty)770 tty_window_bigger(struct tty *tty)
771 {
772 struct client *c = tty->client;
773 struct window *w = c->session->curw->window;
774
775 return (tty->sx < w->sx || tty->sy - status_line_size(c) < w->sy);
776 }
777
778 /* What offset should this window be drawn at? */
779 int
tty_window_offset(struct tty * tty,u_int * ox,u_int * oy,u_int * sx,u_int * sy)780 tty_window_offset(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
781 {
782 *ox = tty->oox;
783 *oy = tty->ooy;
784 *sx = tty->osx;
785 *sy = tty->osy;
786
787 return (tty->oflag);
788 }
789
790 /* What offset should this window be drawn at? */
791 static int
tty_window_offset1(struct tty * tty,u_int * ox,u_int * oy,u_int * sx,u_int * sy)792 tty_window_offset1(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy)
793 {
794 struct client *c = tty->client;
795 struct window *w = c->session->curw->window;
796 struct window_pane *wp = server_client_get_pane(c);
797 u_int cx, cy, lines;
798
799 lines = status_line_size(c);
800
801 if (tty->sx >= w->sx && tty->sy - lines >= w->sy) {
802 *ox = 0;
803 *oy = 0;
804 *sx = w->sx;
805 *sy = w->sy;
806
807 c->pan_window = NULL;
808 return (0);
809 }
810
811 *sx = tty->sx;
812 *sy = tty->sy - lines;
813
814 if (c->pan_window == w) {
815 if (*sx >= w->sx)
816 c->pan_ox = 0;
817 else if (c->pan_ox + *sx > w->sx)
818 c->pan_ox = w->sx - *sx;
819 *ox = c->pan_ox;
820 if (*sy >= w->sy)
821 c->pan_oy = 0;
822 else if (c->pan_oy + *sy > w->sy)
823 c->pan_oy = w->sy - *sy;
824 *oy = c->pan_oy;
825 return (1);
826 }
827
828 if (~wp->screen->mode & MODE_CURSOR) {
829 *ox = 0;
830 *oy = 0;
831 } else {
832 cx = wp->xoff + wp->screen->cx;
833 cy = wp->yoff + wp->screen->cy;
834
835 if (cx < *sx)
836 *ox = 0;
837 else if (cx > w->sx - *sx)
838 *ox = w->sx - *sx;
839 else
840 *ox = cx - *sx / 2;
841
842 if (cy < *sy)
843 *oy = 0;
844 else if (cy > w->sy - *sy)
845 *oy = w->sy - *sy;
846 else
847 *oy = cy - *sy / 2;
848 }
849
850 c->pan_window = NULL;
851 return (1);
852 }
853
854 /* Update stored offsets for a window and redraw if necessary. */
855 void
tty_update_window_offset(struct window * w)856 tty_update_window_offset(struct window *w)
857 {
858 struct client *c;
859
860 TAILQ_FOREACH(c, &clients, entry) {
861 if (c->session != NULL && c->session->curw->window == w)
862 tty_update_client_offset(c);
863 }
864 }
865
866 /* Update stored offsets for a client and redraw if necessary. */
867 void
tty_update_client_offset(struct client * c)868 tty_update_client_offset(struct client *c)
869 {
870 u_int ox, oy, sx, sy;
871
872 if (~c->flags & CLIENT_TERMINAL)
873 return;
874
875 c->tty.oflag = tty_window_offset1(&c->tty, &ox, &oy, &sx, &sy);
876 if (ox == c->tty.oox &&
877 oy == c->tty.ooy &&
878 sx == c->tty.osx &&
879 sy == c->tty.osy)
880 return;
881
882 log_debug ("%s: %s offset has changed (%u,%u %ux%u -> %u,%u %ux%u)",
883 __func__, c->name, c->tty.oox, c->tty.ooy, c->tty.osx, c->tty.osy,
884 ox, oy, sx, sy);
885
886 c->tty.oox = ox;
887 c->tty.ooy = oy;
888 c->tty.osx = sx;
889 c->tty.osy = sy;
890
891 c->flags |= (CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS);
892 }
893
894 /* Get a palette entry. */
895 static int
tty_get_palette(int * palette,int c)896 tty_get_palette(int *palette, int c)
897 {
898 int new;
899
900 if (palette == NULL)
901 return (-1);
902
903 new = -1;
904 if (c < 8)
905 new = palette[c];
906 else if (c >= 90 && c <= 97)
907 new = palette[8 + c - 90];
908 else if (c & COLOUR_FLAG_256)
909 new = palette[c & ~COLOUR_FLAG_256];
910 if (new == 0)
911 return (-1);
912 return (new);
913 }
914
915 /*
916 * Is the region large enough to be worth redrawing once later rather than
917 * probably several times now? Currently yes if it is more than 50% of the
918 * pane.
919 */
920 static int
tty_large_region(__unused struct tty * tty,const struct tty_ctx * ctx)921 tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx)
922 {
923 return (ctx->orlower - ctx->orupper >= ctx->sy / 2);
924 }
925
926 /*
927 * Return if BCE is needed but the terminal doesn't have it - it'll need to be
928 * emulated.
929 */
930 static int
tty_fake_bce(const struct tty * tty,const struct grid_cell * gc,u_int bg)931 tty_fake_bce(const struct tty *tty, const struct grid_cell *gc, u_int bg)
932 {
933 if (tty_term_flag(tty->term, TTYC_BCE))
934 return (0);
935 if (!COLOUR_DEFAULT(bg) || !COLOUR_DEFAULT(gc->bg))
936 return (1);
937 return (0);
938 }
939
940 /*
941 * Redraw scroll region using data from screen (already updated). Used when
942 * CSR not supported, or window is a pane that doesn't take up the full
943 * width of the terminal.
944 */
945 static void
tty_redraw_region(struct tty * tty,const struct tty_ctx * ctx)946 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
947 {
948 struct client *c = tty->client;
949 u_int i;
950
951 /*
952 * If region is large, schedule a redraw. In most cases this is likely
953 * to be followed by some more scrolling.
954 */
955 if (tty_large_region(tty, ctx)) {
956 log_debug("%s: %s large redraw", __func__, c->name);
957 ctx->redraw_cb(ctx);
958 return;
959 }
960
961 for (i = ctx->orupper; i <= ctx->orlower; i++)
962 tty_draw_pane(tty, ctx, i);
963 }
964
965 /* Is this position visible in the pane? */
966 static int
tty_is_visible(__unused struct tty * tty,const struct tty_ctx * ctx,u_int px,u_int py,u_int nx,u_int ny)967 tty_is_visible(__unused struct tty *tty, const struct tty_ctx *ctx, u_int px,
968 u_int py, u_int nx, u_int ny)
969 {
970 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
971
972 if (!ctx->bigger)
973 return (1);
974
975 if (xoff + nx <= ctx->wox || xoff >= ctx->wox + ctx->wsx ||
976 yoff + ny <= ctx->woy || yoff >= ctx->woy + ctx->wsy)
977 return (0);
978 return (1);
979 }
980
981 /* Clamp line position to visible part of pane. */
982 static int
tty_clamp_line(struct tty * tty,const struct tty_ctx * ctx,u_int px,u_int py,u_int nx,u_int * i,u_int * x,u_int * rx,u_int * ry)983 tty_clamp_line(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
984 u_int nx, u_int *i, u_int *x, u_int *rx, u_int *ry)
985 {
986 u_int xoff = ctx->rxoff + px;
987
988 if (!tty_is_visible(tty, ctx, px, py, nx, 1))
989 return (0);
990 *ry = ctx->yoff + py - ctx->woy;
991
992 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
993 /* All visible. */
994 *i = 0;
995 *x = ctx->xoff + px - ctx->wox;
996 *rx = nx;
997 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
998 /* Both left and right not visible. */
999 *i = ctx->wox;
1000 *x = 0;
1001 *rx = ctx->wsx;
1002 } else if (xoff < ctx->wox) {
1003 /* Left not visible. */
1004 *i = ctx->wox - (ctx->xoff + px);
1005 *x = 0;
1006 *rx = nx - *i;
1007 } else {
1008 /* Right not visible. */
1009 *i = 0;
1010 *x = (ctx->xoff + px) - ctx->wox;
1011 *rx = ctx->wsx - *x;
1012 }
1013 if (*rx > nx)
1014 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1015
1016 return (1);
1017 }
1018
1019 /* Clear a line. */
1020 static void
tty_clear_line(struct tty * tty,const struct grid_cell * defaults,u_int py,u_int px,u_int nx,u_int bg)1021 tty_clear_line(struct tty *tty, const struct grid_cell *defaults, u_int py,
1022 u_int px, u_int nx, u_int bg)
1023 {
1024 struct client *c = tty->client;
1025
1026 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1027
1028 /* Nothing to clear. */
1029 if (nx == 0)
1030 return;
1031
1032 /* If genuine BCE is available, can try escape sequences. */
1033 if (!tty_fake_bce(tty, defaults, bg)) {
1034 /* Off the end of the line, use EL if available. */
1035 if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) {
1036 tty_cursor(tty, px, py);
1037 tty_putcode(tty, TTYC_EL);
1038 return;
1039 }
1040
1041 /* At the start of the line. Use EL1. */
1042 if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) {
1043 tty_cursor(tty, px + nx - 1, py);
1044 tty_putcode(tty, TTYC_EL1);
1045 return;
1046 }
1047
1048 /* Section of line. Use ECH if possible. */
1049 if (tty_term_has(tty->term, TTYC_ECH)) {
1050 tty_cursor(tty, px, py);
1051 tty_putcode1(tty, TTYC_ECH, nx);
1052 return;
1053 }
1054 }
1055
1056 /* Couldn't use an escape sequence, use spaces. */
1057 tty_cursor(tty, px, py);
1058 tty_repeat_space(tty, nx);
1059 }
1060
1061 /* Clear a line, adjusting to visible part of pane. */
1062 static void
tty_clear_pane_line(struct tty * tty,const struct tty_ctx * ctx,u_int py,u_int px,u_int nx,u_int bg)1063 tty_clear_pane_line(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1064 u_int px, u_int nx, u_int bg)
1065 {
1066 struct client *c = tty->client;
1067 u_int i, x, rx, ry;
1068
1069 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py);
1070
1071 if (tty_clamp_line(tty, ctx, px, py, nx, &i, &x, &rx, &ry))
1072 tty_clear_line(tty, &ctx->defaults, ry, x, rx, bg);
1073 }
1074
1075 /* Clamp area position to visible part of pane. */
1076 static int
tty_clamp_area(struct tty * tty,const struct tty_ctx * ctx,u_int px,u_int py,u_int nx,u_int ny,u_int * i,u_int * j,u_int * x,u_int * y,u_int * rx,u_int * ry)1077 tty_clamp_area(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py,
1078 u_int nx, u_int ny, u_int *i, u_int *j, u_int *x, u_int *y, u_int *rx,
1079 u_int *ry)
1080 {
1081 u_int xoff = ctx->rxoff + px, yoff = ctx->ryoff + py;
1082
1083 if (!tty_is_visible(tty, ctx, px, py, nx, ny))
1084 return (0);
1085
1086 if (xoff >= ctx->wox && xoff + nx <= ctx->wox + ctx->wsx) {
1087 /* All visible. */
1088 *i = 0;
1089 *x = ctx->xoff + px - ctx->wox;
1090 *rx = nx;
1091 } else if (xoff < ctx->wox && xoff + nx > ctx->wox + ctx->wsx) {
1092 /* Both left and right not visible. */
1093 *i = ctx->wox;
1094 *x = 0;
1095 *rx = ctx->wsx;
1096 } else if (xoff < ctx->wox) {
1097 /* Left not visible. */
1098 *i = ctx->wox - (ctx->xoff + px);
1099 *x = 0;
1100 *rx = nx - *i;
1101 } else {
1102 /* Right not visible. */
1103 *i = 0;
1104 *x = (ctx->xoff + px) - ctx->wox;
1105 *rx = ctx->wsx - *x;
1106 }
1107 if (*rx > nx)
1108 fatalx("%s: x too big, %u > %u", __func__, *rx, nx);
1109
1110 if (yoff >= ctx->woy && yoff + ny <= ctx->woy + ctx->wsy) {
1111 /* All visible. */
1112 *j = 0;
1113 *y = ctx->yoff + py - ctx->woy;
1114 *ry = ny;
1115 } else if (yoff < ctx->woy && yoff + ny > ctx->woy + ctx->wsy) {
1116 /* Both top and bottom not visible. */
1117 *j = ctx->woy;
1118 *y = 0;
1119 *ry = ctx->wsy;
1120 } else if (yoff < ctx->woy) {
1121 /* Top not visible. */
1122 *j = ctx->woy - (ctx->yoff + py);
1123 *y = 0;
1124 *ry = ny - *j;
1125 } else {
1126 /* Bottom not visible. */
1127 *j = 0;
1128 *y = (ctx->yoff + py) - ctx->woy;
1129 *ry = ctx->wsy - *y;
1130 }
1131 if (*ry > ny)
1132 fatalx("%s: y too big, %u > %u", __func__, *ry, ny);
1133
1134 return (1);
1135 }
1136
1137 /* Clear an area, adjusting to visible part of pane. */
1138 static void
tty_clear_area(struct tty * tty,const struct grid_cell * defaults,u_int py,u_int ny,u_int px,u_int nx,u_int bg)1139 tty_clear_area(struct tty *tty, const struct grid_cell *defaults, u_int py,
1140 u_int ny, u_int px, u_int nx, u_int bg)
1141 {
1142 struct client *c = tty->client;
1143 u_int yy;
1144 char tmp[64];
1145
1146 log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py);
1147
1148 /* Nothing to clear. */
1149 if (nx == 0 || ny == 0)
1150 return;
1151
1152 /* If genuine BCE is available, can try escape sequences. */
1153 if (!tty_fake_bce(tty, defaults, bg)) {
1154 /* Use ED if clearing off the bottom of the terminal. */
1155 if (px == 0 &&
1156 px + nx >= tty->sx &&
1157 py + ny >= tty->sy &&
1158 tty_term_has(tty->term, TTYC_ED)) {
1159 tty_cursor(tty, 0, py);
1160 tty_putcode(tty, TTYC_ED);
1161 return;
1162 }
1163
1164 /*
1165 * On VT420 compatible terminals we can use DECFRA if the
1166 * background colour isn't default (because it doesn't work
1167 * after SGR 0).
1168 */
1169 if ((tty->term->flags & TERM_DECFRA) && !COLOUR_DEFAULT(bg)) {
1170 xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
1171 py + 1, px + 1, py + ny, px + nx);
1172 tty_puts(tty, tmp);
1173 return;
1174 }
1175
1176 /* Full lines can be scrolled away to clear them. */
1177 if (px == 0 &&
1178 px + nx >= tty->sx &&
1179 ny > 2 &&
1180 tty_term_has(tty->term, TTYC_CSR) &&
1181 tty_term_has(tty->term, TTYC_INDN)) {
1182 tty_region(tty, py, py + ny - 1);
1183 tty_margin_off(tty);
1184 tty_putcode1(tty, TTYC_INDN, ny);
1185 return;
1186 }
1187
1188 /*
1189 * If margins are supported, can just scroll the area off to
1190 * clear it.
1191 */
1192 if (nx > 2 &&
1193 ny > 2 &&
1194 tty_term_has(tty->term, TTYC_CSR) &&
1195 tty_use_margin(tty) &&
1196 tty_term_has(tty->term, TTYC_INDN)) {
1197 tty_region(tty, py, py + ny - 1);
1198 tty_margin(tty, px, px + nx - 1);
1199 tty_putcode1(tty, TTYC_INDN, ny);
1200 return;
1201 }
1202 }
1203
1204 /* Couldn't use an escape sequence, loop over the lines. */
1205 for (yy = py; yy < py + ny; yy++)
1206 tty_clear_line(tty, defaults, yy, px, nx, bg);
1207 }
1208
1209 /* Clear an area in a pane. */
1210 static void
tty_clear_pane_area(struct tty * tty,const struct tty_ctx * ctx,u_int py,u_int ny,u_int px,u_int nx,u_int bg)1211 tty_clear_pane_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
1212 u_int ny, u_int px, u_int nx, u_int bg)
1213 {
1214 u_int i, j, x, y, rx, ry;
1215
1216 if (tty_clamp_area(tty, ctx, px, py, nx, ny, &i, &j, &x, &y, &rx, &ry))
1217 tty_clear_area(tty, &ctx->defaults, y, ry, x, rx, bg);
1218 }
1219
1220 static void
tty_draw_pane(struct tty * tty,const struct tty_ctx * ctx,u_int py)1221 tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
1222 {
1223 struct screen *s = ctx->s;
1224 u_int nx = ctx->sx, i, x, rx, ry;
1225
1226 log_debug("%s: %s %u %d", __func__, tty->client->name, py, ctx->bigger);
1227
1228 if (!ctx->bigger) {
1229 tty_draw_line(tty, s, 0, py, nx, ctx->xoff, ctx->yoff + py,
1230 &ctx->defaults, ctx->palette);
1231 return;
1232 }
1233 if (tty_clamp_line(tty, ctx, 0, py, nx, &i, &x, &rx, &ry)) {
1234 tty_draw_line(tty, s, i, py, rx, x, ry, &ctx->defaults,
1235 ctx->palette);
1236 }
1237 }
1238
1239 static const struct grid_cell *
tty_check_codeset(struct tty * tty,const struct grid_cell * gc)1240 tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
1241 {
1242 static struct grid_cell new;
1243 int c;
1244
1245 /* Characters less than 0x7f are always fine, no matter what. */
1246 if (gc->data.size == 1 && *gc->data.data < 0x7f)
1247 return (gc);
1248
1249 /* UTF-8 terminal and a UTF-8 character - fine. */
1250 if (tty->client->flags & CLIENT_UTF8)
1251 return (gc);
1252 memcpy(&new, gc, sizeof new);
1253
1254 /* See if this can be mapped to an ACS character. */
1255 c = tty_acs_reverse_get(tty, gc->data.data, gc->data.size);
1256 if (c != -1) {
1257 utf8_set(&new.data, c);
1258 new.attr |= GRID_ATTR_CHARSET;
1259 return (&new);
1260 }
1261
1262 /* Replace by the right number of underscores. */
1263 new.data.size = gc->data.width;
1264 if (new.data.size > UTF8_SIZE)
1265 new.data.size = UTF8_SIZE;
1266 memset(new.data.data, '_', new.data.size);
1267 return (&new);
1268 }
1269
1270 static int
tty_check_overlay(struct tty * tty,u_int px,u_int py)1271 tty_check_overlay(struct tty *tty, u_int px, u_int py)
1272 {
1273 struct client *c = tty->client;
1274
1275 if (c->overlay_check == NULL)
1276 return (1);
1277 return (c->overlay_check(c, px, py));
1278 }
1279
1280 void
tty_draw_line(struct tty * tty,struct screen * s,u_int px,u_int py,u_int nx,u_int atx,u_int aty,const struct grid_cell * defaults,int * palette)1281 tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
1282 u_int atx, u_int aty, const struct grid_cell *defaults, int *palette)
1283 {
1284 struct grid *gd = s->grid;
1285 struct grid_cell gc, last;
1286 const struct grid_cell *gcp;
1287 struct grid_line *gl;
1288 u_int i, j, ux, sx, width;
1289 int flags, cleared = 0, wrapped = 0;
1290 char buf[512];
1291 size_t len;
1292 u_int cellsize;
1293
1294 log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__,
1295 px, py, nx, atx, aty);
1296
1297 /*
1298 * py is the line in the screen to draw.
1299 * px is the start x and nx is the width to draw.
1300 * atx,aty is the line on the terminal to draw it.
1301 */
1302
1303 flags = (tty->flags & TTY_NOCURSOR);
1304 tty->flags |= TTY_NOCURSOR;
1305 tty_update_mode(tty, tty->mode, s);
1306
1307 tty_region_off(tty);
1308 tty_margin_off(tty);
1309
1310 /*
1311 * Clamp the width to cellsize - note this is not cellused, because
1312 * there may be empty background cells after it (from BCE).
1313 */
1314 sx = screen_size_x(s);
1315 if (nx > sx)
1316 nx = sx;
1317 cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
1318 if (sx > cellsize)
1319 sx = cellsize;
1320 if (sx > tty->sx)
1321 sx = tty->sx;
1322 if (sx > nx)
1323 sx = nx;
1324 ux = 0;
1325
1326 if (py == 0)
1327 gl = NULL;
1328 else
1329 gl = grid_get_line(gd, gd->hsize + py - 1);
1330 if (gl == NULL ||
1331 (~gl->flags & GRID_LINE_WRAPPED) ||
1332 atx != 0 ||
1333 tty->cx < tty->sx ||
1334 nx < tty->sx) {
1335 if (nx < tty->sx &&
1336 atx == 0 &&
1337 px + sx != nx &&
1338 tty_term_has(tty->term, TTYC_EL1) &&
1339 !tty_fake_bce(tty, defaults, 8)) {
1340 tty_default_attributes(tty, defaults, palette, 8);
1341 tty_cursor(tty, nx - 1, aty);
1342 tty_putcode(tty, TTYC_EL1);
1343 cleared = 1;
1344 }
1345 } else {
1346 log_debug("%s: wrapped line %u", __func__, aty);
1347 wrapped = 1;
1348 }
1349
1350 memcpy(&last, &grid_default_cell, sizeof last);
1351 len = 0;
1352 width = 0;
1353
1354 for (i = 0; i < sx; i++) {
1355 grid_view_get_cell(gd, px + i, py, &gc);
1356 gcp = tty_check_codeset(tty, &gc);
1357 if (len != 0 &&
1358 (!tty_check_overlay(tty, atx + ux + width, aty) ||
1359 (gcp->attr & GRID_ATTR_CHARSET) ||
1360 gcp->flags != last.flags ||
1361 gcp->attr != last.attr ||
1362 gcp->fg != last.fg ||
1363 gcp->bg != last.bg ||
1364 gcp->us != last.us ||
1365 ux + width + gcp->data.width > nx ||
1366 (sizeof buf) - len < gcp->data.size)) {
1367 tty_attributes(tty, &last, defaults, palette);
1368 if (last.flags & GRID_FLAG_CLEARED) {
1369 log_debug("%s: %zu cleared", __func__, len);
1370 tty_clear_line(tty, defaults, aty, atx + ux,
1371 width, last.bg);
1372 } else {
1373 if (!wrapped || atx != 0 || ux != 0)
1374 tty_cursor(tty, atx + ux, aty);
1375 tty_putn(tty, buf, len, width);
1376 }
1377 ux += width;
1378
1379 len = 0;
1380 width = 0;
1381 wrapped = 0;
1382 }
1383
1384 if (gcp->flags & GRID_FLAG_SELECTED)
1385 screen_select_cell(s, &last, gcp);
1386 else
1387 memcpy(&last, gcp, sizeof last);
1388 if (!tty_check_overlay(tty, atx + ux, aty)) {
1389 if (~gcp->flags & GRID_FLAG_PADDING)
1390 ux += gcp->data.width;
1391 } else if (ux + gcp->data.width > nx) {
1392 tty_attributes(tty, &last, defaults, palette);
1393 tty_cursor(tty, atx + ux, aty);
1394 for (j = 0; j < gcp->data.width; j++) {
1395 if (ux + j > nx)
1396 break;
1397 tty_putc(tty, ' ');
1398 ux++;
1399 }
1400 } else if (gcp->attr & GRID_ATTR_CHARSET) {
1401 tty_attributes(tty, &last, defaults, palette);
1402 tty_cursor(tty, atx + ux, aty);
1403 for (j = 0; j < gcp->data.size; j++)
1404 tty_putc(tty, gcp->data.data[j]);
1405 ux += gcp->data.width;
1406 } else if (~gcp->flags & GRID_FLAG_PADDING) {
1407 memcpy(buf + len, gcp->data.data, gcp->data.size);
1408 len += gcp->data.size;
1409 width += gcp->data.width;
1410 }
1411 }
1412 if (len != 0 && ((~last.flags & GRID_FLAG_CLEARED) || last.bg != 8)) {
1413 tty_attributes(tty, &last, defaults, palette);
1414 if (last.flags & GRID_FLAG_CLEARED) {
1415 log_debug("%s: %zu cleared (end)", __func__, len);
1416 tty_clear_line(tty, defaults, aty, atx + ux, width,
1417 last.bg);
1418 } else {
1419 if (!wrapped || atx != 0 || ux != 0)
1420 tty_cursor(tty, atx + ux, aty);
1421 tty_putn(tty, buf, len, width);
1422 }
1423 ux += width;
1424 }
1425
1426 if (!cleared && ux < nx) {
1427 log_debug("%s: %u to end of line (%zu cleared)", __func__,
1428 nx - ux, len);
1429 tty_default_attributes(tty, defaults, palette, 8);
1430 tty_clear_line(tty, defaults, aty, atx + ux, nx - ux, 8);
1431 }
1432
1433 tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags;
1434 tty_update_mode(tty, tty->mode, s);
1435 }
1436
1437 void
tty_sync_start(struct tty * tty)1438 tty_sync_start(struct tty *tty)
1439 {
1440 if (tty->flags & TTY_BLOCK)
1441 return;
1442 if (tty->flags & TTY_SYNCING)
1443 return;
1444 tty->flags |= TTY_SYNCING;
1445
1446 if (tty_term_has(tty->term, TTYC_SYNC)) {
1447 log_debug("%s sync start", tty->client->name);
1448 tty_putcode1(tty, TTYC_SYNC, 1);
1449 }
1450 }
1451
1452 void
tty_sync_end(struct tty * tty)1453 tty_sync_end(struct tty *tty)
1454 {
1455 if (tty->flags & TTY_BLOCK)
1456 return;
1457 if (~tty->flags & TTY_SYNCING)
1458 return;
1459 tty->flags &= ~TTY_SYNCING;
1460
1461 if (tty_term_has(tty->term, TTYC_SYNC)) {
1462 log_debug("%s sync end", tty->client->name);
1463 tty_putcode1(tty, TTYC_SYNC, 2);
1464 }
1465 }
1466
1467 static int
tty_client_ready(struct client * c)1468 tty_client_ready(struct client *c)
1469 {
1470 if (c->session == NULL || c->tty.term == NULL)
1471 return (0);
1472 if (c->flags & (CLIENT_REDRAWWINDOW|CLIENT_SUSPENDED))
1473 return (0);
1474 if (c->tty.flags & TTY_FREEZE)
1475 return (0);
1476 return (1);
1477 }
1478
1479 void
tty_write(void (* cmdfn)(struct tty *,const struct tty_ctx *),struct tty_ctx * ctx)1480 tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
1481 struct tty_ctx *ctx)
1482 {
1483 struct client *c;
1484 int state;
1485
1486 if (ctx->set_client_cb == NULL)
1487 return;
1488 TAILQ_FOREACH(c, &clients, entry) {
1489 if (!tty_client_ready(c))
1490 continue;
1491 state = ctx->set_client_cb(ctx, c);
1492 if (state == -1)
1493 break;
1494 if (state == 0)
1495 continue;
1496 cmdfn(&c->tty, ctx);
1497 }
1498 }
1499
1500 void
tty_cmd_insertcharacter(struct tty * tty,const struct tty_ctx * ctx)1501 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
1502 {
1503 if (ctx->bigger ||
1504 !tty_full_width(tty, ctx) ||
1505 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1506 (!tty_term_has(tty->term, TTYC_ICH) &&
1507 !tty_term_has(tty->term, TTYC_ICH1))) {
1508 tty_draw_pane(tty, ctx, ctx->ocy);
1509 return;
1510 }
1511
1512 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1513
1514 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1515
1516 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
1517 }
1518
1519 void
tty_cmd_deletecharacter(struct tty * tty,const struct tty_ctx * ctx)1520 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
1521 {
1522 if (ctx->bigger ||
1523 !tty_full_width(tty, ctx) ||
1524 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1525 (!tty_term_has(tty->term, TTYC_DCH) &&
1526 !tty_term_has(tty->term, TTYC_DCH1))) {
1527 tty_draw_pane(tty, ctx, ctx->ocy);
1528 return;
1529 }
1530
1531 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1532
1533 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1534
1535 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
1536 }
1537
1538 void
tty_cmd_clearcharacter(struct tty * tty,const struct tty_ctx * ctx)1539 tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx)
1540 {
1541 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1542
1543 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, ctx->num, ctx->bg);
1544 }
1545
1546 void
tty_cmd_insertline(struct tty * tty,const struct tty_ctx * ctx)1547 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
1548 {
1549 if (ctx->bigger ||
1550 !tty_full_width(tty, ctx) ||
1551 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1552 !tty_term_has(tty->term, TTYC_CSR) ||
1553 !tty_term_has(tty->term, TTYC_IL1) ||
1554 ctx->sx == 1 ||
1555 ctx->sy == 1) {
1556 tty_redraw_region(tty, ctx);
1557 return;
1558 }
1559
1560 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1561
1562 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1563 tty_margin_off(tty);
1564 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1565
1566 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
1567 tty->cx = tty->cy = UINT_MAX;
1568 }
1569
1570 void
tty_cmd_deleteline(struct tty * tty,const struct tty_ctx * ctx)1571 tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
1572 {
1573 if (ctx->bigger ||
1574 !tty_full_width(tty, ctx) ||
1575 tty_fake_bce(tty, &ctx->defaults, ctx->bg) ||
1576 !tty_term_has(tty->term, TTYC_CSR) ||
1577 !tty_term_has(tty->term, TTYC_DL1) ||
1578 ctx->sx == 1 ||
1579 ctx->sy == 1) {
1580 tty_redraw_region(tty, ctx);
1581 return;
1582 }
1583
1584 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1585
1586 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1587 tty_margin_off(tty);
1588 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1589
1590 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
1591 tty->cx = tty->cy = UINT_MAX;
1592 }
1593
1594 void
tty_cmd_clearline(struct tty * tty,const struct tty_ctx * ctx)1595 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
1596 {
1597 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1598
1599 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->sx, ctx->bg);
1600 }
1601
1602 void
tty_cmd_clearendofline(struct tty * tty,const struct tty_ctx * ctx)1603 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
1604 {
1605 u_int nx = ctx->sx - ctx->ocx;
1606
1607 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1608
1609 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, nx, ctx->bg);
1610 }
1611
1612 void
tty_cmd_clearstartofline(struct tty * tty,const struct tty_ctx * ctx)1613 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
1614 {
1615 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1616
1617 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->ocx + 1, ctx->bg);
1618 }
1619
1620 void
tty_cmd_reverseindex(struct tty * tty,const struct tty_ctx * ctx)1621 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
1622 {
1623 if (ctx->ocy != ctx->orupper)
1624 return;
1625
1626 if (ctx->bigger ||
1627 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1628 tty_fake_bce(tty, &ctx->defaults, 8) ||
1629 !tty_term_has(tty->term, TTYC_CSR) ||
1630 (!tty_term_has(tty->term, TTYC_RI) &&
1631 !tty_term_has(tty->term, TTYC_RIN)) ||
1632 ctx->sx == 1 ||
1633 ctx->sy == 1) {
1634 tty_redraw_region(tty, ctx);
1635 return;
1636 }
1637
1638 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1639
1640 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1641 tty_margin_pane(tty, ctx);
1642 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1643
1644 if (tty_term_has(tty->term, TTYC_RI))
1645 tty_putcode(tty, TTYC_RI);
1646 else
1647 tty_putcode1(tty, TTYC_RIN, 1);
1648 }
1649
1650 void
tty_cmd_linefeed(struct tty * tty,const struct tty_ctx * ctx)1651 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
1652 {
1653 if (ctx->ocy != ctx->orlower)
1654 return;
1655
1656 if (ctx->bigger ||
1657 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1658 tty_fake_bce(tty, &ctx->defaults, 8) ||
1659 !tty_term_has(tty->term, TTYC_CSR) ||
1660 ctx->sx == 1 ||
1661 ctx->sy == 1) {
1662 tty_redraw_region(tty, ctx);
1663 return;
1664 }
1665
1666 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1667
1668 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1669 tty_margin_pane(tty, ctx);
1670
1671 /*
1672 * If we want to wrap a pane while using margins, the cursor needs to
1673 * be exactly on the right of the region. If the cursor is entirely off
1674 * the edge - move it back to the right. Some terminals are funny about
1675 * this and insert extra spaces, so only use the right if margins are
1676 * enabled.
1677 */
1678 if (ctx->xoff + ctx->ocx > tty->rright) {
1679 if (!tty_use_margin(tty))
1680 tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
1681 else
1682 tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
1683 } else
1684 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
1685
1686 tty_putc(tty, '\n');
1687 }
1688
1689 void
tty_cmd_scrollup(struct tty * tty,const struct tty_ctx * ctx)1690 tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
1691 {
1692 u_int i;
1693
1694 if (ctx->bigger ||
1695 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1696 tty_fake_bce(tty, &ctx->defaults, 8) ||
1697 !tty_term_has(tty->term, TTYC_CSR) ||
1698 ctx->sx == 1 ||
1699 ctx->sy == 1) {
1700 tty_redraw_region(tty, ctx);
1701 return;
1702 }
1703
1704 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1705
1706 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1707 tty_margin_pane(tty, ctx);
1708
1709 if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
1710 if (!tty_use_margin(tty))
1711 tty_cursor(tty, 0, tty->rlower);
1712 else
1713 tty_cursor(tty, tty->rright, tty->rlower);
1714 for (i = 0; i < ctx->num; i++)
1715 tty_putc(tty, '\n');
1716 } else {
1717 if (tty->cy == UINT_MAX)
1718 tty_cursor(tty, 0, 0);
1719 else
1720 tty_cursor(tty, 0, tty->cy);
1721 tty_putcode1(tty, TTYC_INDN, ctx->num);
1722 }
1723 }
1724
1725 void
tty_cmd_scrolldown(struct tty * tty,const struct tty_ctx * ctx)1726 tty_cmd_scrolldown(struct tty *tty, const struct tty_ctx *ctx)
1727 {
1728 u_int i;
1729
1730 if (ctx->bigger ||
1731 (!tty_full_width(tty, ctx) && !tty_use_margin(tty)) ||
1732 tty_fake_bce(tty, &ctx->defaults, 8) ||
1733 !tty_term_has(tty->term, TTYC_CSR) ||
1734 (!tty_term_has(tty->term, TTYC_RI) &&
1735 !tty_term_has(tty->term, TTYC_RIN)) ||
1736 ctx->sx == 1 ||
1737 ctx->sy == 1) {
1738 tty_redraw_region(tty, ctx);
1739 return;
1740 }
1741
1742 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1743
1744 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1745 tty_margin_pane(tty, ctx);
1746 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
1747
1748 if (tty_term_has(tty->term, TTYC_RIN))
1749 tty_putcode1(tty, TTYC_RIN, ctx->num);
1750 else {
1751 for (i = 0; i < ctx->num; i++)
1752 tty_putcode(tty, TTYC_RI);
1753 }
1754 }
1755
1756 void
tty_cmd_clearendofscreen(struct tty * tty,const struct tty_ctx * ctx)1757 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
1758 {
1759 u_int px, py, nx, ny;
1760
1761 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1762
1763 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1764 tty_margin_off(tty);
1765
1766 px = 0;
1767 nx = ctx->sx;
1768 py = ctx->ocy + 1;
1769 ny = ctx->sy - ctx->ocy - 1;
1770
1771 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1772
1773 px = ctx->ocx;
1774 nx = ctx->sx - ctx->ocx;
1775 py = ctx->ocy;
1776
1777 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1778 }
1779
1780 void
tty_cmd_clearstartofscreen(struct tty * tty,const struct tty_ctx * ctx)1781 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
1782 {
1783 u_int px, py, nx, ny;
1784
1785 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1786
1787 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1788 tty_margin_off(tty);
1789
1790 px = 0;
1791 nx = ctx->sx;
1792 py = 0;
1793 ny = ctx->ocy;
1794
1795 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1796
1797 px = 0;
1798 nx = ctx->ocx + 1;
1799 py = ctx->ocy;
1800
1801 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg);
1802 }
1803
1804 void
tty_cmd_clearscreen(struct tty * tty,const struct tty_ctx * ctx)1805 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
1806 {
1807 u_int px, py, nx, ny;
1808
1809 tty_default_attributes(tty, &ctx->defaults, ctx->palette, ctx->bg);
1810
1811 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1812 tty_margin_off(tty);
1813
1814 px = 0;
1815 nx = ctx->sx;
1816 py = 0;
1817 ny = ctx->sy;
1818
1819 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg);
1820 }
1821
1822 void
tty_cmd_alignmenttest(struct tty * tty,const struct tty_ctx * ctx)1823 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
1824 {
1825 u_int i, j;
1826
1827 if (ctx->bigger) {
1828 ctx->redraw_cb(ctx);
1829 return;
1830 }
1831
1832 tty_attributes(tty, &grid_default_cell, &ctx->defaults, ctx->palette);
1833
1834 tty_region_pane(tty, ctx, 0, ctx->sy - 1);
1835 tty_margin_off(tty);
1836
1837 for (j = 0; j < ctx->sy; j++) {
1838 tty_cursor_pane(tty, ctx, 0, j);
1839 for (i = 0; i < ctx->sx; i++)
1840 tty_putc(tty, 'E');
1841 }
1842 }
1843
1844 void
tty_cmd_cell(struct tty * tty,const struct tty_ctx * ctx)1845 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
1846 {
1847 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, 1, 1))
1848 return;
1849
1850 if (ctx->xoff + ctx->ocx - ctx->wox > tty->sx - 1 &&
1851 ctx->ocy == ctx->orlower &&
1852 tty_full_width(tty, ctx))
1853 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
1854
1855 tty_margin_off(tty);
1856 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
1857
1858 tty_cell(tty, ctx->cell, &ctx->defaults, ctx->palette);
1859 }
1860
1861 void
tty_cmd_cells(struct tty * tty,const struct tty_ctx * ctx)1862 tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx)
1863 {
1864 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, ctx->num, 1))
1865 return;
1866
1867 if (ctx->bigger &&
1868 (ctx->xoff + ctx->ocx < ctx->wox ||
1869 ctx->xoff + ctx->ocx + ctx->num > ctx->wox + ctx->wsx)) {
1870 if (!ctx->wrapped ||
1871 !tty_full_width(tty, ctx) ||
1872 (tty->term->flags & TERM_NOAM) ||
1873 ctx->xoff + ctx->ocx != 0 ||
1874 ctx->yoff + ctx->ocy != tty->cy + 1 ||
1875 tty->cx < tty->sx ||
1876 tty->cy == tty->rlower)
1877 tty_draw_pane(tty, ctx, ctx->ocy);
1878 else
1879 ctx->redraw_cb(ctx);
1880 return;
1881 }
1882
1883 tty_margin_off(tty);
1884 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
1885
1886 tty_attributes(tty, ctx->cell, &ctx->defaults, ctx->palette);
1887 tty_putn(tty, ctx->ptr, ctx->num, ctx->num);
1888 }
1889
1890 void
tty_cmd_setselection(struct tty * tty,const struct tty_ctx * ctx)1891 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
1892 {
1893 tty_set_selection(tty, ctx->ptr, ctx->num);
1894 }
1895
1896 void
tty_set_selection(struct tty * tty,const char * buf,size_t len)1897 tty_set_selection(struct tty *tty, const char *buf, size_t len)
1898 {
1899 char *encoded;
1900 size_t size;
1901
1902 if (~tty->flags & TTY_STARTED)
1903 return;
1904 if (!tty_term_has(tty->term, TTYC_MS))
1905 return;
1906
1907 size = 4 * ((len + 2) / 3) + 1; /* storage for base64 */
1908 encoded = xmalloc(size);
1909
1910 b64_ntop(buf, len, encoded, size);
1911 tty_putcode_ptr2(tty, TTYC_MS, "", encoded);
1912
1913 free(encoded);
1914 }
1915
1916 void
tty_cmd_rawstring(struct tty * tty,const struct tty_ctx * ctx)1917 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
1918 {
1919 tty_add(tty, ctx->ptr, ctx->num);
1920 tty_invalidate(tty);
1921 }
1922
1923 void
tty_cmd_syncstart(struct tty * tty,__unused const struct tty_ctx * ctx)1924 tty_cmd_syncstart(struct tty *tty, __unused const struct tty_ctx *ctx)
1925 {
1926 tty_sync_start(tty);
1927 }
1928
1929 void
tty_cell(struct tty * tty,const struct grid_cell * gc,const struct grid_cell * defaults,int * palette)1930 tty_cell(struct tty *tty, const struct grid_cell *gc,
1931 const struct grid_cell *defaults, int *palette)
1932 {
1933 const struct grid_cell *gcp;
1934
1935 /* Skip last character if terminal is stupid. */
1936 if ((tty->term->flags & TERM_NOAM) &&
1937 tty->cy == tty->sy - 1 &&
1938 tty->cx == tty->sx - 1)
1939 return;
1940
1941 /* If this is a padding character, do nothing. */
1942 if (gc->flags & GRID_FLAG_PADDING)
1943 return;
1944
1945 /* Check the output codeset and apply attributes. */
1946 gcp = tty_check_codeset(tty, gc);
1947 tty_attributes(tty, gcp, defaults, palette);
1948
1949 /* If it is a single character, write with putc to handle ACS. */
1950 if (gcp->data.size == 1) {
1951 tty_attributes(tty, gcp, defaults, palette);
1952 if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f)
1953 return;
1954 tty_putc(tty, *gcp->data.data);
1955 return;
1956 }
1957
1958 /* Write the data. */
1959 tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width);
1960 }
1961
1962 void
tty_reset(struct tty * tty)1963 tty_reset(struct tty *tty)
1964 {
1965 struct grid_cell *gc = &tty->cell;
1966
1967 if (!grid_cells_equal(gc, &grid_default_cell)) {
1968 if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
1969 tty_putcode(tty, TTYC_RMACS);
1970 tty_putcode(tty, TTYC_SGR0);
1971 memcpy(gc, &grid_default_cell, sizeof *gc);
1972 }
1973 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
1974 }
1975
1976 static void
tty_invalidate(struct tty * tty)1977 tty_invalidate(struct tty *tty)
1978 {
1979 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
1980 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
1981
1982 tty->cx = tty->cy = UINT_MAX;
1983 tty->rupper = tty->rleft = UINT_MAX;
1984 tty->rlower = tty->rright = UINT_MAX;
1985
1986 if (tty->flags & TTY_STARTED) {
1987 if (tty_use_margin(tty))
1988 tty_putcode(tty, TTYC_ENMG);
1989 tty_putcode(tty, TTYC_SGR0);
1990
1991 tty->mode = ALL_MODES;
1992 tty_update_mode(tty, MODE_CURSOR, NULL);
1993
1994 tty_cursor(tty, 0, 0);
1995 tty_region_off(tty);
1996 tty_margin_off(tty);
1997 } else
1998 tty->mode = MODE_CURSOR;
1999 }
2000
2001 /* Turn off margin. */
2002 void
tty_region_off(struct tty * tty)2003 tty_region_off(struct tty *tty)
2004 {
2005 tty_region(tty, 0, tty->sy - 1);
2006 }
2007
2008 /* Set region inside pane. */
2009 static void
tty_region_pane(struct tty * tty,const struct tty_ctx * ctx,u_int rupper,u_int rlower)2010 tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper,
2011 u_int rlower)
2012 {
2013 tty_region(tty, ctx->yoff + rupper - ctx->woy,
2014 ctx->yoff + rlower - ctx->woy);
2015 }
2016
2017 /* Set region at absolute position. */
2018 static void
tty_region(struct tty * tty,u_int rupper,u_int rlower)2019 tty_region(struct tty *tty, u_int rupper, u_int rlower)
2020 {
2021 if (tty->rlower == rlower && tty->rupper == rupper)
2022 return;
2023 if (!tty_term_has(tty->term, TTYC_CSR))
2024 return;
2025
2026 tty->rupper = rupper;
2027 tty->rlower = rlower;
2028
2029 /*
2030 * Some terminals (such as PuTTY) do not correctly reset the cursor to
2031 * 0,0 if it is beyond the last column (they do not reset their wrap
2032 * flag so further output causes a line feed). As a workaround, do an
2033 * explicit move to 0 first.
2034 */
2035 if (tty->cx >= tty->sx) {
2036 if (tty->cy == UINT_MAX)
2037 tty_cursor(tty, 0, 0);
2038 else
2039 tty_cursor(tty, 0, tty->cy);
2040 }
2041
2042 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
2043 tty->cx = tty->cy = UINT_MAX;
2044 }
2045
2046 /* Turn off margin. */
2047 void
tty_margin_off(struct tty * tty)2048 tty_margin_off(struct tty *tty)
2049 {
2050 tty_margin(tty, 0, tty->sx - 1);
2051 }
2052
2053 /* Set margin inside pane. */
2054 static void
tty_margin_pane(struct tty * tty,const struct tty_ctx * ctx)2055 tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx)
2056 {
2057 tty_margin(tty, ctx->xoff - ctx->wox,
2058 ctx->xoff + ctx->sx - 1 - ctx->wox);
2059 }
2060
2061 /* Set margin at absolute position. */
2062 static void
tty_margin(struct tty * tty,u_int rleft,u_int rright)2063 tty_margin(struct tty *tty, u_int rleft, u_int rright)
2064 {
2065 if (!tty_use_margin(tty))
2066 return;
2067 if (tty->rleft == rleft && tty->rright == rright)
2068 return;
2069
2070 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
2071
2072 tty->rleft = rleft;
2073 tty->rright = rright;
2074
2075 if (rleft == 0 && rright == tty->sx - 1)
2076 tty_putcode(tty, TTYC_CLMG);
2077 else
2078 tty_putcode2(tty, TTYC_CMG, rleft, rright);
2079 tty->cx = tty->cy = UINT_MAX;
2080 }
2081
2082 /*
2083 * Move the cursor, unless it would wrap itself when the next character is
2084 * printed.
2085 */
2086 static void
tty_cursor_pane_unless_wrap(struct tty * tty,const struct tty_ctx * ctx,u_int cx,u_int cy)2087 tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx,
2088 u_int cx, u_int cy)
2089 {
2090 if (!ctx->wrapped ||
2091 !tty_full_width(tty, ctx) ||
2092 (tty->term->flags & TERM_NOAM) ||
2093 ctx->xoff + cx != 0 ||
2094 ctx->yoff + cy != tty->cy + 1 ||
2095 tty->cx < tty->sx ||
2096 tty->cy == tty->rlower)
2097 tty_cursor_pane(tty, ctx, cx, cy);
2098 else
2099 log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy);
2100 }
2101
2102 /* Move cursor inside pane. */
2103 static void
tty_cursor_pane(struct tty * tty,const struct tty_ctx * ctx,u_int cx,u_int cy)2104 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
2105 {
2106 tty_cursor(tty, ctx->xoff + cx - ctx->wox, ctx->yoff + cy - ctx->woy);
2107 }
2108
2109 /* Move cursor to absolute position. */
2110 void
tty_cursor(struct tty * tty,u_int cx,u_int cy)2111 tty_cursor(struct tty *tty, u_int cx, u_int cy)
2112 {
2113 struct tty_term *term = tty->term;
2114 u_int thisx, thisy;
2115 int change;
2116
2117 if (tty->flags & TTY_BLOCK)
2118 return;
2119
2120 if (cx > tty->sx - 1)
2121 cx = tty->sx - 1;
2122
2123 thisx = tty->cx;
2124 thisy = tty->cy;
2125
2126 /* No change. */
2127 if (cx == thisx && cy == thisy)
2128 return;
2129
2130 /* Very end of the line, just use absolute movement. */
2131 if (thisx > tty->sx - 1)
2132 goto absolute;
2133
2134 /* Move to home position (0, 0). */
2135 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
2136 tty_putcode(tty, TTYC_HOME);
2137 goto out;
2138 }
2139
2140 /* Zero on the next line. */
2141 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower &&
2142 (!tty_use_margin(tty) || tty->rleft == 0)) {
2143 tty_putc(tty, '\r');
2144 tty_putc(tty, '\n');
2145 goto out;
2146 }
2147
2148 /* Moving column or row. */
2149 if (cy == thisy) {
2150 /*
2151 * Moving column only, row staying the same.
2152 */
2153
2154 /* To left edge. */
2155 if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) {
2156 tty_putc(tty, '\r');
2157 goto out;
2158 }
2159
2160 /* One to the left. */
2161 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
2162 tty_putcode(tty, TTYC_CUB1);
2163 goto out;
2164 }
2165
2166 /* One to the right. */
2167 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
2168 tty_putcode(tty, TTYC_CUF1);
2169 goto out;
2170 }
2171
2172 /* Calculate difference. */
2173 change = thisx - cx; /* +ve left, -ve right */
2174
2175 /*
2176 * Use HPA if change is larger than absolute, otherwise move
2177 * the cursor with CUB/CUF.
2178 */
2179 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
2180 tty_putcode1(tty, TTYC_HPA, cx);
2181 goto out;
2182 } else if (change > 0 &&
2183 tty_term_has(term, TTYC_CUB) &&
2184 !tty_use_margin(tty)) {
2185 if (change == 2 && tty_term_has(term, TTYC_CUB1)) {
2186 tty_putcode(tty, TTYC_CUB1);
2187 tty_putcode(tty, TTYC_CUB1);
2188 goto out;
2189 }
2190 tty_putcode1(tty, TTYC_CUB, change);
2191 goto out;
2192 } else if (change < 0 &&
2193 tty_term_has(term, TTYC_CUF) &&
2194 !tty_use_margin(tty)) {
2195 tty_putcode1(tty, TTYC_CUF, -change);
2196 goto out;
2197 }
2198 } else if (cx == thisx) {
2199 /*
2200 * Moving row only, column staying the same.
2201 */
2202
2203 /* One above. */
2204 if (thisy != tty->rupper &&
2205 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
2206 tty_putcode(tty, TTYC_CUU1);
2207 goto out;
2208 }
2209
2210 /* One below. */
2211 if (thisy != tty->rlower &&
2212 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
2213 tty_putcode(tty, TTYC_CUD1);
2214 goto out;
2215 }
2216
2217 /* Calculate difference. */
2218 change = thisy - cy; /* +ve up, -ve down */
2219
2220 /*
2221 * Try to use VPA if change is larger than absolute or if this
2222 * change would cross the scroll region, otherwise use CUU/CUD.
2223 */
2224 if ((u_int) abs(change) > cy ||
2225 (change < 0 && cy - change > tty->rlower) ||
2226 (change > 0 && cy - change < tty->rupper)) {
2227 if (tty_term_has(term, TTYC_VPA)) {
2228 tty_putcode1(tty, TTYC_VPA, cy);
2229 goto out;
2230 }
2231 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
2232 tty_putcode1(tty, TTYC_CUU, change);
2233 goto out;
2234 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
2235 tty_putcode1(tty, TTYC_CUD, -change);
2236 goto out;
2237 }
2238 }
2239
2240 absolute:
2241 /* Absolute movement. */
2242 tty_putcode2(tty, TTYC_CUP, cy, cx);
2243
2244 out:
2245 tty->cx = cx;
2246 tty->cy = cy;
2247 }
2248
2249 void
tty_attributes(struct tty * tty,const struct grid_cell * gc,const struct grid_cell * defaults,int * palette)2250 tty_attributes(struct tty *tty, const struct grid_cell *gc,
2251 const struct grid_cell *defaults, int *palette)
2252 {
2253 struct grid_cell *tc = &tty->cell, gc2;
2254 int changed;
2255
2256 /* Copy cell and update default colours. */
2257 memcpy(&gc2, gc, sizeof gc2);
2258 if (gc2.fg == 8)
2259 gc2.fg = defaults->fg;
2260 if (gc2.bg == 8)
2261 gc2.bg = defaults->bg;
2262
2263 /* Ignore cell if it is the same as the last one. */
2264 if (gc2.attr == tty->last_cell.attr &&
2265 gc2.fg == tty->last_cell.fg &&
2266 gc2.bg == tty->last_cell.bg &&
2267 gc2.us == tty->last_cell.us)
2268 return;
2269
2270 /*
2271 * If no setab, try to use the reverse attribute as a best-effort for a
2272 * non-default background. This is a bit of a hack but it doesn't do
2273 * any serious harm and makes a couple of applications happier.
2274 */
2275 if (!tty_term_has(tty->term, TTYC_SETAB)) {
2276 if (gc2.attr & GRID_ATTR_REVERSE) {
2277 if (gc2.fg != 7 && !COLOUR_DEFAULT(gc2.fg))
2278 gc2.attr &= ~GRID_ATTR_REVERSE;
2279 } else {
2280 if (gc2.bg != 0 && !COLOUR_DEFAULT(gc2.bg))
2281 gc2.attr |= GRID_ATTR_REVERSE;
2282 }
2283 }
2284
2285 /* Fix up the colours if necessary. */
2286 tty_check_fg(tty, palette, &gc2);
2287 tty_check_bg(tty, palette, &gc2);
2288 tty_check_us(tty, palette, &gc2);
2289
2290 /*
2291 * If any bits are being cleared or the underline colour is now default,
2292 * reset everything.
2293 */
2294 if ((tc->attr & ~gc2.attr) || (tc->us != gc2.us && gc2.us == 0))
2295 tty_reset(tty);
2296
2297 /*
2298 * Set the colours. This may call tty_reset() (so it comes next) and
2299 * may add to (NOT remove) the desired attributes.
2300 */
2301 tty_colours(tty, &gc2);
2302
2303 /* Filter out attribute bits already set. */
2304 changed = gc2.attr & ~tc->attr;
2305 tc->attr = gc2.attr;
2306
2307 /* Set the attributes. */
2308 if (changed & GRID_ATTR_BRIGHT)
2309 tty_putcode(tty, TTYC_BOLD);
2310 if (changed & GRID_ATTR_DIM)
2311 tty_putcode(tty, TTYC_DIM);
2312 if (changed & GRID_ATTR_ITALICS)
2313 tty_set_italics(tty);
2314 if (changed & GRID_ATTR_ALL_UNDERSCORE) {
2315 if ((changed & GRID_ATTR_UNDERSCORE) ||
2316 !tty_term_has(tty->term, TTYC_SMULX))
2317 tty_putcode(tty, TTYC_SMUL);
2318 else if (changed & GRID_ATTR_UNDERSCORE_2)
2319 tty_putcode1(tty, TTYC_SMULX, 2);
2320 else if (changed & GRID_ATTR_UNDERSCORE_3)
2321 tty_putcode1(tty, TTYC_SMULX, 3);
2322 else if (changed & GRID_ATTR_UNDERSCORE_4)
2323 tty_putcode1(tty, TTYC_SMULX, 4);
2324 else if (changed & GRID_ATTR_UNDERSCORE_5)
2325 tty_putcode1(tty, TTYC_SMULX, 5);
2326 }
2327 if (changed & GRID_ATTR_BLINK)
2328 tty_putcode(tty, TTYC_BLINK);
2329 if (changed & GRID_ATTR_REVERSE) {
2330 if (tty_term_has(tty->term, TTYC_REV))
2331 tty_putcode(tty, TTYC_REV);
2332 else if (tty_term_has(tty->term, TTYC_SMSO))
2333 tty_putcode(tty, TTYC_SMSO);
2334 }
2335 if (changed & GRID_ATTR_HIDDEN)
2336 tty_putcode(tty, TTYC_INVIS);
2337 if (changed & GRID_ATTR_STRIKETHROUGH)
2338 tty_putcode(tty, TTYC_SMXX);
2339 if (changed & GRID_ATTR_OVERLINE)
2340 tty_putcode(tty, TTYC_SMOL);
2341 if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
2342 tty_putcode(tty, TTYC_SMACS);
2343
2344 memcpy(&tty->last_cell, &gc2, sizeof tty->last_cell);
2345 }
2346
2347 static void
tty_colours(struct tty * tty,const struct grid_cell * gc)2348 tty_colours(struct tty *tty, const struct grid_cell *gc)
2349 {
2350 struct grid_cell *tc = &tty->cell;
2351 int have_ax;
2352
2353 /* No changes? Nothing is necessary. */
2354 if (gc->fg == tc->fg && gc->bg == tc->bg && gc->us == tc->us)
2355 return;
2356
2357 /*
2358 * Is either the default colour? This is handled specially because the
2359 * best solution might be to reset both colours to default, in which
2360 * case if only one is default need to fall onward to set the other
2361 * colour.
2362 */
2363 if (COLOUR_DEFAULT(gc->fg) || COLOUR_DEFAULT(gc->bg)) {
2364 /*
2365 * If don't have AX but do have op, send sgr0 (op can't
2366 * actually be used because it is sometimes the same as sgr0
2367 * and sometimes isn't). This resets both colours to default.
2368 *
2369 * Otherwise, try to set the default colour only as needed.
2370 */
2371 have_ax = tty_term_flag(tty->term, TTYC_AX);
2372 if (!have_ax && tty_term_has(tty->term, TTYC_OP))
2373 tty_reset(tty);
2374 else {
2375 if (COLOUR_DEFAULT(gc->fg) && !COLOUR_DEFAULT(tc->fg)) {
2376 if (have_ax)
2377 tty_puts(tty, "\033[39m");
2378 else if (tc->fg != 7)
2379 tty_putcode1(tty, TTYC_SETAF, 7);
2380 tc->fg = gc->fg;
2381 }
2382 if (COLOUR_DEFAULT(gc->bg) && !COLOUR_DEFAULT(tc->bg)) {
2383 if (have_ax)
2384 tty_puts(tty, "\033[49m");
2385 else if (tc->bg != 0)
2386 tty_putcode1(tty, TTYC_SETAB, 0);
2387 tc->bg = gc->bg;
2388 }
2389 }
2390 }
2391
2392 /* Set the foreground colour. */
2393 if (!COLOUR_DEFAULT(gc->fg) && gc->fg != tc->fg)
2394 tty_colours_fg(tty, gc);
2395
2396 /*
2397 * Set the background colour. This must come after the foreground as
2398 * tty_colour_fg() can call tty_reset().
2399 */
2400 if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg)
2401 tty_colours_bg(tty, gc);
2402
2403 /* Set the underscore color. */
2404 if (gc->us != tc->us)
2405 tty_colours_us(tty, gc);
2406 }
2407
2408 static void
tty_check_fg(struct tty * tty,int * palette,struct grid_cell * gc)2409 tty_check_fg(struct tty *tty, int *palette, struct grid_cell *gc)
2410 {
2411 u_char r, g, b;
2412 u_int colours;
2413 int c;
2414
2415 /*
2416 * Perform substitution if this pane has a palette. If the bright
2417 * attribute is set, use the bright entry in the palette by changing to
2418 * the aixterm colour.
2419 */
2420 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2421 c = gc->fg;
2422 if (c < 8 && gc->attr & GRID_ATTR_BRIGHT)
2423 c += 90;
2424 if ((c = tty_get_palette(palette, c)) != -1)
2425 gc->fg = c;
2426 }
2427
2428 /* Is this a 24-bit colour? */
2429 if (gc->fg & COLOUR_FLAG_RGB) {
2430 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2431 if (tty->term->flags & TERM_RGBCOLOURS)
2432 return;
2433 colour_split_rgb(gc->fg, &r, &g, &b);
2434 gc->fg = colour_find_rgb(r, g, b);
2435 }
2436
2437 /* How many colours does this terminal have? */
2438 if (tty->term->flags & TERM_256COLOURS)
2439 colours = 256;
2440 else
2441 colours = tty_term_number(tty->term, TTYC_COLORS);
2442
2443 /* Is this a 256-colour colour? */
2444 if (gc->fg & COLOUR_FLAG_256) {
2445 /* And not a 256 colour mode? */
2446 if (colours < 256) {
2447 gc->fg = colour_256to16(gc->fg);
2448 if (gc->fg & 8) {
2449 gc->fg &= 7;
2450 if (colours >= 16)
2451 gc->fg += 90;
2452 }
2453 }
2454 return;
2455 }
2456
2457 /* Is this an aixterm colour? */
2458 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
2459 gc->fg -= 90;
2460 gc->attr |= GRID_ATTR_BRIGHT;
2461 }
2462 }
2463
2464 static void
tty_check_bg(struct tty * tty,int * palette,struct grid_cell * gc)2465 tty_check_bg(struct tty *tty, int *palette, struct grid_cell *gc)
2466 {
2467 u_char r, g, b;
2468 u_int colours;
2469 int c;
2470
2471 /* Perform substitution if this pane has a palette. */
2472 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2473 if ((c = tty_get_palette(palette, gc->bg)) != -1)
2474 gc->bg = c;
2475 }
2476
2477 /* Is this a 24-bit colour? */
2478 if (gc->bg & COLOUR_FLAG_RGB) {
2479 /* Not a 24-bit terminal? Translate to 256-colour palette. */
2480 if (tty->term->flags & TERM_RGBCOLOURS)
2481 return;
2482 colour_split_rgb(gc->bg, &r, &g, &b);
2483 gc->bg = colour_find_rgb(r, g, b);
2484 }
2485
2486 /* How many colours does this terminal have? */
2487 if (tty->term->flags & TERM_256COLOURS)
2488 colours = 256;
2489 else
2490 colours = tty_term_number(tty->term, TTYC_COLORS);
2491
2492 /* Is this a 256-colour colour? */
2493 if (gc->bg & COLOUR_FLAG_256) {
2494 /*
2495 * And not a 256 colour mode? Translate to 16-colour
2496 * palette. Bold background doesn't exist portably, so just
2497 * discard the bold bit if set.
2498 */
2499 if (colours < 256) {
2500 gc->bg = colour_256to16(gc->bg);
2501 if (gc->bg & 8) {
2502 gc->bg &= 7;
2503 if (colours >= 16)
2504 gc->bg += 90;
2505 }
2506 }
2507 return;
2508 }
2509
2510 /* Is this an aixterm colour? */
2511 if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
2512 gc->bg -= 90;
2513 }
2514
2515 static void
tty_check_us(__unused struct tty * tty,int * palette,struct grid_cell * gc)2516 tty_check_us(__unused struct tty *tty, int *palette, struct grid_cell *gc)
2517 {
2518 int c;
2519
2520 /* Perform substitution if this pane has a palette. */
2521 if (~gc->flags & GRID_FLAG_NOPALETTE) {
2522 if ((c = tty_get_palette(palette, gc->us)) != -1)
2523 gc->us = c;
2524 }
2525
2526 /* Underscore colour is set as RGB so convert a 256 colour to RGB. */
2527 if (gc->us & COLOUR_FLAG_256)
2528 gc->us = colour_256toRGB (gc->us);
2529 }
2530
2531 static void
tty_colours_fg(struct tty * tty,const struct grid_cell * gc)2532 tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
2533 {
2534 struct grid_cell *tc = &tty->cell;
2535 char s[32];
2536
2537 /* Is this a 24-bit or 256-colour colour? */
2538 if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
2539 if (tty_try_colour(tty, gc->fg, "38") == 0)
2540 goto save;
2541 /* Should not get here, already converted in tty_check_fg. */
2542 return;
2543 }
2544
2545 /* Is this an aixterm bright colour? */
2546 if (gc->fg >= 90 && gc->fg <= 97) {
2547 if (tty->term->flags & TERM_256COLOURS) {
2548 xsnprintf(s, sizeof s, "\033[%dm", gc->fg);
2549 tty_puts(tty, s);
2550 } else
2551 tty_putcode1(tty, TTYC_SETAF, gc->fg - 90 + 8);
2552 goto save;
2553 }
2554
2555 /* Otherwise set the foreground colour. */
2556 tty_putcode1(tty, TTYC_SETAF, gc->fg);
2557
2558 save:
2559 /* Save the new values in the terminal current cell. */
2560 tc->fg = gc->fg;
2561 }
2562
2563 static void
tty_colours_bg(struct tty * tty,const struct grid_cell * gc)2564 tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
2565 {
2566 struct grid_cell *tc = &tty->cell;
2567 char s[32];
2568
2569 /* Is this a 24-bit or 256-colour colour? */
2570 if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
2571 if (tty_try_colour(tty, gc->bg, "48") == 0)
2572 goto save;
2573 /* Should not get here, already converted in tty_check_bg. */
2574 return;
2575 }
2576
2577 /* Is this an aixterm bright colour? */
2578 if (gc->bg >= 90 && gc->bg <= 97) {
2579 if (tty->term->flags & TERM_256COLOURS) {
2580 xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10);
2581 tty_puts(tty, s);
2582 } else
2583 tty_putcode1(tty, TTYC_SETAB, gc->bg - 90 + 8);
2584 goto save;
2585 }
2586
2587 /* Otherwise set the background colour. */
2588 tty_putcode1(tty, TTYC_SETAB, gc->bg);
2589
2590 save:
2591 /* Save the new values in the terminal current cell. */
2592 tc->bg = gc->bg;
2593 }
2594
2595 static void
tty_colours_us(struct tty * tty,const struct grid_cell * gc)2596 tty_colours_us(struct tty *tty, const struct grid_cell *gc)
2597 {
2598 struct grid_cell *tc = &tty->cell;
2599 u_int c;
2600 u_char r, g, b;
2601
2602 /* Clear underline colour. */
2603 if (gc->us == 0) {
2604 tty_putcode(tty, TTYC_OL);
2605 goto save;
2606 }
2607
2608 /* Must be an RGB colour - this should never happen. */
2609 if (~gc->us & COLOUR_FLAG_RGB)
2610 return;
2611
2612 /*
2613 * Setulc and setal follows the ncurses(3) one argument "direct colour"
2614 * capability format. Calculate the colour value.
2615 */
2616 colour_split_rgb(gc->us, &r, &g, &b);
2617 c = (65536 * r) + (256 * g) + b;
2618
2619 /*
2620 * Write the colour. Only use setal if the RGB flag is set because the
2621 * non-RGB version may be wrong.
2622 */
2623 if (tty_term_has(tty->term, TTYC_SETULC))
2624 tty_putcode1(tty, TTYC_SETULC, c);
2625 else if (tty_term_has(tty->term, TTYC_SETAL) &&
2626 tty_term_has(tty->term, TTYC_RGB))
2627 tty_putcode1(tty, TTYC_SETAL, c);
2628
2629 save:
2630 /* Save the new values in the terminal current cell. */
2631 tc->us = gc->us;
2632 }
2633
2634 static int
tty_try_colour(struct tty * tty,int colour,const char * type)2635 tty_try_colour(struct tty *tty, int colour, const char *type)
2636 {
2637 u_char r, g, b;
2638
2639 if (colour & COLOUR_FLAG_256) {
2640 if (*type == '3' && tty_term_has(tty->term, TTYC_SETAF))
2641 tty_putcode1(tty, TTYC_SETAF, colour & 0xff);
2642 else if (tty_term_has(tty->term, TTYC_SETAB))
2643 tty_putcode1(tty, TTYC_SETAB, colour & 0xff);
2644 return (0);
2645 }
2646
2647 if (colour & COLOUR_FLAG_RGB) {
2648 colour_split_rgb(colour & 0xffffff, &r, &g, &b);
2649 if (*type == '3' && tty_term_has(tty->term, TTYC_SETRGBF))
2650 tty_putcode3(tty, TTYC_SETRGBF, r, g, b);
2651 else if (tty_term_has(tty->term, TTYC_SETRGBB))
2652 tty_putcode3(tty, TTYC_SETRGBB, r, g, b);
2653 return (0);
2654 }
2655
2656 return (-1);
2657 }
2658
2659 static void
tty_window_default_style(struct grid_cell * gc,struct window_pane * wp)2660 tty_window_default_style(struct grid_cell *gc, struct window_pane *wp)
2661 {
2662 memcpy(gc, &grid_default_cell, sizeof *gc);
2663 gc->fg = wp->fg;
2664 gc->bg = wp->bg;
2665 }
2666
2667 void
tty_default_colours(struct grid_cell * gc,struct window_pane * wp)2668 tty_default_colours(struct grid_cell *gc, struct window_pane *wp)
2669 {
2670 struct options *oo = wp->options;
2671
2672 memcpy(gc, &grid_default_cell, sizeof *gc);
2673
2674 if (wp->flags & PANE_STYLECHANGED) {
2675 wp->flags &= ~PANE_STYLECHANGED;
2676
2677 tty_window_default_style(&wp->cached_active_gc, wp);
2678 style_add(&wp->cached_active_gc, oo, "window-active-style",
2679 NULL);
2680 tty_window_default_style(&wp->cached_gc, wp);
2681 style_add(&wp->cached_gc, oo, "window-style", NULL);
2682 }
2683
2684 if (gc->fg == 8) {
2685 if (wp == wp->window->active && wp->cached_active_gc.fg != 8)
2686 gc->fg = wp->cached_active_gc.fg;
2687 else
2688 gc->fg = wp->cached_gc.fg;
2689 }
2690
2691 if (gc->bg == 8) {
2692 if (wp == wp->window->active && wp->cached_active_gc.bg != 8)
2693 gc->bg = wp->cached_active_gc.bg;
2694 else
2695 gc->bg = wp->cached_gc.bg;
2696 }
2697 }
2698
2699 static void
tty_default_attributes(struct tty * tty,const struct grid_cell * defaults,int * palette,u_int bg)2700 tty_default_attributes(struct tty *tty, const struct grid_cell *defaults,
2701 int *palette, u_int bg)
2702 {
2703 struct grid_cell gc;
2704
2705 memcpy(&gc, &grid_default_cell, sizeof gc);
2706 gc.bg = bg;
2707 tty_attributes(tty, &gc, defaults, palette);
2708 }
2709