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Merge branch 'obsd-master'
[tmux.git] / window.c
blob81d0f809bcb75ae59a0a02c66ae3377e7ca2d1ce
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 <ctype.h>
23 #include <errno.h>
24 #include <fcntl.h>
25 #include <fnmatch.h>
26 #include <regex.h>
27 #include <signal.h>
28 #include <stdint.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <time.h>
32 #include <unistd.h>
33
34 #include "tmux.h"
35
36 /*
37 * Each window is attached to a number of panes, each of which is a pty. This
38 * file contains code to handle them.
39 *
40 * A pane has two buffers attached, these are filled and emptied by the main
41 * server poll loop. Output data is received from pty's in screen format,
42 * translated and returned as a series of escape sequences and strings via
43 * input_parse (in input.c). Input data is received as key codes and written
44 * directly via input_key.
45 *
46 * Each pane also has a "virtual" screen (screen.c) which contains the current
47 * state and is redisplayed when the window is reattached to a client.
48 *
49 * Windows are stored directly on a global array and wrapped in any number of
50 * winlink structs to be linked onto local session RB trees. A reference count
51 * is maintained and a window removed from the global list and destroyed when
52 * it reaches zero.
53 */
54
55 /* Global window list. */
56 struct windows windows;
57
58 /* Global panes tree. */
59 struct window_pane_tree all_window_panes;
60 static u_int next_window_pane_id;
61 static u_int next_window_id;
62 static u_int next_active_point;
63
64 struct window_pane_input_data {
65 struct cmdq_item *item;
66 u_int wp;
67 struct client_file *file;
68 };
69
70 static struct window_pane *window_pane_create(struct window *, u_int, u_int,
71 u_int);
72 static void window_pane_destroy(struct window_pane *);
73
74 RB_GENERATE(windows, window, entry, window_cmp);
75 RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
76 RB_GENERATE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
77
78 int
79 window_cmp(struct window *w1, struct window *w2)
80 {
81 return (w1->id - w2->id);
82 }
83
84 int
85 winlink_cmp(struct winlink *wl1, struct winlink *wl2)
86 {
87 return (wl1->idx - wl2->idx);
88 }
89
90 int
91 window_pane_cmp(struct window_pane *wp1, struct window_pane *wp2)
92 {
93 return (wp1->id - wp2->id);
94 }
95
96 struct winlink *
97 winlink_find_by_window(struct winlinks *wwl, struct window *w)
98 {
99 struct winlink *wl;
100
101 RB_FOREACH(wl, winlinks, wwl) {
102 if (wl->window == w)
103 return (wl);
104 }
105
106 return (NULL);
107 }
108
109 struct winlink *
110 winlink_find_by_index(struct winlinks *wwl, int idx)
111 {
112 struct winlink wl;
113
114 if (idx < 0)
115 fatalx("bad index");
116
117 wl.idx = idx;
118 return (RB_FIND(winlinks, wwl, &wl));
119 }
120
121 struct winlink *
122 winlink_find_by_window_id(struct winlinks *wwl, u_int id)
123 {
124 struct winlink *wl;
125
126 RB_FOREACH(wl, winlinks, wwl) {
127 if (wl->window->id == id)
128 return (wl);
129 }
130 return (NULL);
131 }
132
133 static int
134 winlink_next_index(struct winlinks *wwl, int idx)
135 {
136 int i;
137
138 i = idx;
139 do {
140 if (winlink_find_by_index(wwl, i) == NULL)
141 return (i);
142 if (i == INT_MAX)
143 i = 0;
144 else
145 i++;
146 } while (i != idx);
147 return (-1);
148 }
149
150 u_int
151 winlink_count(struct winlinks *wwl)
152 {
153 struct winlink *wl;
154 u_int n;
155
156 n = 0;
157 RB_FOREACH(wl, winlinks, wwl)
158 n++;
159
160 return (n);
161 }
162
163 struct winlink *
164 winlink_add(struct winlinks *wwl, int idx)
165 {
166 struct winlink *wl;
167
168 if (idx < 0) {
169 if ((idx = winlink_next_index(wwl, -idx - 1)) == -1)
170 return (NULL);
171 } else if (winlink_find_by_index(wwl, idx) != NULL)
172 return (NULL);
173
174 wl = xcalloc(1, sizeof *wl);
175 wl->idx = idx;
176 RB_INSERT(winlinks, wwl, wl);
177
178 return (wl);
179 }
180
181 void
182 winlink_set_window(struct winlink *wl, struct window *w)
183 {
184 if (wl->window != NULL) {
185 TAILQ_REMOVE(&wl->window->winlinks, wl, wentry);
186 window_remove_ref(wl->window, __func__);
187 }
188 TAILQ_INSERT_TAIL(&w->winlinks, wl, wentry);
189 wl->window = w;
190 window_add_ref(w, __func__);
191 }
192
193 void
194 winlink_remove(struct winlinks *wwl, struct winlink *wl)
195 {
196 struct window *w = wl->window;
197
198 if (w != NULL) {
199 TAILQ_REMOVE(&w->winlinks, wl, wentry);
200 window_remove_ref(w, __func__);
201 }
202
203 RB_REMOVE(winlinks, wwl, wl);
204 free(wl);
205 }
206
207 struct winlink *
208 winlink_next(struct winlink *wl)
209 {
210 return (RB_NEXT(winlinks, wwl, wl));
211 }
212
213 struct winlink *
214 winlink_previous(struct winlink *wl)
215 {
216 return (RB_PREV(winlinks, wwl, wl));
217 }
218
219 struct winlink *
220 winlink_next_by_number(struct winlink *wl, struct session *s, int n)
221 {
222 for (; n > 0; n--) {
223 if ((wl = RB_NEXT(winlinks, wwl, wl)) == NULL)
224 wl = RB_MIN(winlinks, &s->windows);
225 }
226
227 return (wl);
228 }
229
230 struct winlink *
231 winlink_previous_by_number(struct winlink *wl, struct session *s, int n)
232 {
233 for (; n > 0; n--) {
234 if ((wl = RB_PREV(winlinks, wwl, wl)) == NULL)
235 wl = RB_MAX(winlinks, &s->windows);
236 }
237
238 return (wl);
239 }
240
241 void
242 winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
243 {
244 if (wl == NULL)
245 return;
246
247 winlink_stack_remove(stack, wl);
248 TAILQ_INSERT_HEAD(stack, wl, sentry);
249 wl->flags |= WINLINK_VISITED;
250 }
251
252 void
253 winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
254 {
255 if (wl != NULL && (wl->flags & WINLINK_VISITED)) {
256 TAILQ_REMOVE(stack, wl, sentry);
257 wl->flags &= ~WINLINK_VISITED;
258 }
259 }
260
261 struct window *
262 window_find_by_id_str(const char *s)
263 {
264 const char *errstr;
265 u_int id;
266
267 if (*s != '@')
268 return (NULL);
269
270 id = strtonum(s + 1, 0, UINT_MAX, &errstr);
271 if (errstr != NULL)
272 return (NULL);
273 return (window_find_by_id(id));
274 }
275
276 struct window *
277 window_find_by_id(u_int id)
278 {
279 struct window w;
280
281 w.id = id;
282 return (RB_FIND(windows, &windows, &w));
283 }
284
285 void
286 window_update_activity(struct window *w)
287 {
288 gettimeofday(&w->activity_time, NULL);
289 alerts_queue(w, WINDOW_ACTIVITY);
290 }
291
292 struct window *
293 window_create(u_int sx, u_int sy, u_int xpixel, u_int ypixel)
294 {
295 struct window *w;
296
297 if (xpixel == 0)
298 xpixel = DEFAULT_XPIXEL;
299 if (ypixel == 0)
300 ypixel = DEFAULT_YPIXEL;
301
302 w = xcalloc(1, sizeof *w);
303 w->name = xstrdup("");
304 w->flags = 0;
305
306 TAILQ_INIT(&w->panes);
307 TAILQ_INIT(&w->last_panes);
308 w->active = NULL;
309
310 w->lastlayout = -1;
311 w->layout_root = NULL;
312
313 w->sx = sx;
314 w->sy = sy;
315 w->manual_sx = sx;
316 w->manual_sy = sy;
317 w->xpixel = xpixel;
318 w->ypixel = ypixel;
319
320 w->options = options_create(global_w_options);
321
322 w->references = 0;
323 TAILQ_INIT(&w->winlinks);
324
325 w->id = next_window_id++;
326 RB_INSERT(windows, &windows, w);
327
328 window_set_fill_character(w);
329 window_update_activity(w);
330
331 log_debug("%s: @%u create %ux%u (%ux%u)", __func__, w->id, sx, sy,
332 w->xpixel, w->ypixel);
333 return (w);
334 }
335
336 static void
337 window_destroy(struct window *w)
338 {
339 log_debug("window @%u destroyed (%d references)", w->id, w->references);
340
341 window_unzoom(w);
342 RB_REMOVE(windows, &windows, w);
343
344 if (w->layout_root != NULL)
345 layout_free_cell(w->layout_root);
346 if (w->saved_layout_root != NULL)
347 layout_free_cell(w->saved_layout_root);
348 free(w->old_layout);
349
350 window_destroy_panes(w);
351
352 if (event_initialized(&w->name_event))
353 evtimer_del(&w->name_event);
354
355 if (event_initialized(&w->alerts_timer))
356 evtimer_del(&w->alerts_timer);
357 if (event_initialized(&w->offset_timer))
358 event_del(&w->offset_timer);
359
360 options_free(w->options);
361 free(w->fill_character);
362
363 free(w->name);
364 free(w);
365 }
366
367 int
368 window_pane_destroy_ready(struct window_pane *wp)
369 {
370 int n;
371
372 if (wp->pipe_fd != -1) {
373 if (EVBUFFER_LENGTH(wp->pipe_event->output) != 0)
374 return (0);
375 if (ioctl(wp->fd, FIONREAD, &n) != -1 && n > 0)
376 return (0);
377 }
378
379 if (~wp->flags & PANE_EXITED)
380 return (0);
381 return (1);
382 }
383
384 void
385 window_add_ref(struct window *w, const char *from)
386 {
387 w->references++;
388 log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
389 }
390
391 void
392 window_remove_ref(struct window *w, const char *from)
393 {
394 w->references--;
395 log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
396
397 if (w->references == 0)
398 window_destroy(w);
399 }
400
401 void
402 window_set_name(struct window *w, const char *new_name)
403 {
404 free(w->name);
405 utf8_stravis(&w->name, new_name, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
406 notify_window("window-renamed", w);
407 }
408
409 void
410 window_resize(struct window *w, u_int sx, u_int sy, int xpixel, int ypixel)
411 {
412 if (xpixel == 0)
413 xpixel = DEFAULT_XPIXEL;
414 if (ypixel == 0)
415 ypixel = DEFAULT_YPIXEL;
416
417 log_debug("%s: @%u resize %ux%u (%ux%u)", __func__, w->id, sx, sy,
418 xpixel == -1 ? w->xpixel : (u_int)xpixel,
419 ypixel == -1 ? w->ypixel : (u_int)ypixel);
420 w->sx = sx;
421 w->sy = sy;
422 if (xpixel != -1)
423 w->xpixel = xpixel;
424 if (ypixel != -1)
425 w->ypixel = ypixel;
426 }
427
428 void
429 window_pane_send_resize(struct window_pane *wp, u_int sx, u_int sy)
430 {
431 struct window *w = wp->window;
432 struct winsize ws;
433
434 if (wp->fd == -1)
435 return;
436
437 log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, sx, sy);
438
439 memset(&ws, 0, sizeof ws);
440 ws.ws_col = sx;
441 ws.ws_row = sy;
442 ws.ws_xpixel = w->xpixel * ws.ws_col;
443 ws.ws_ypixel = w->ypixel * ws.ws_row;
444 if (ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
445 #ifdef __sun
446 /*
447 * Some versions of Solaris apparently can return an error when
448 * resizing; don't know why this happens, can't reproduce on
449 * other platforms and ignoring it doesn't seem to cause any
450 * issues.
451 */
452 if (errno != EINVAL && errno != ENXIO)
453 #endif
454 fatal("ioctl failed");
455 }
456
457 int
458 window_has_pane(struct window *w, struct window_pane *wp)
459 {
460 struct window_pane *wp1;
461
462 TAILQ_FOREACH(wp1, &w->panes, entry) {
463 if (wp1 == wp)
464 return (1);
465 }
466 return (0);
467 }
468
469 void
470 window_update_focus(struct window *w)
471 {
472 if (w != NULL) {
473 log_debug("%s: @%u", __func__, w->id);
474 window_pane_update_focus(w->active);
475 }
476 }
477
478 void
479 window_pane_update_focus(struct window_pane *wp)
480 {
481 struct client *c;
482 int focused = 0;
483
484 if (wp != NULL) {
485 if (wp != wp->window->active)
486 focused = 0;
487 else {
488 TAILQ_FOREACH(c, &clients, entry) {
489 if (c->session != NULL &&
490 c->session->attached != 0 &&
491 (c->flags & CLIENT_FOCUSED) &&
492 c->session->curw->window == wp->window) {
493 focused = 1;
494 break;
495 }
496 }
497 }
498 if (!focused && (wp->flags & PANE_FOCUSED)) {
499 log_debug("%s: %%%u focus out", __func__, wp->id);
500 if (wp->base.mode & MODE_FOCUSON)
501 bufferevent_write(wp->event, "\033[O", 3);
502 notify_pane("pane-focus-out", wp);
503 wp->flags &= ~PANE_FOCUSED;
504 } else if (focused && (~wp->flags & PANE_FOCUSED)) {
505 log_debug("%s: %%%u focus in", __func__, wp->id);
506 if (wp->base.mode & MODE_FOCUSON)
507 bufferevent_write(wp->event, "\033[I", 3);
508 notify_pane("pane-focus-in", wp);
509 wp->flags |= PANE_FOCUSED;
510 } else
511 log_debug("%s: %%%u focus unchanged", __func__, wp->id);
512 }
513 }
514
515 int
516 window_set_active_pane(struct window *w, struct window_pane *wp, int notify)
517 {
518 struct window_pane *lastwp;
519
520 log_debug("%s: pane %%%u", __func__, wp->id);
521
522 if (wp == w->active)
523 return (0);
524 lastwp = w->active;
525
526 window_pane_stack_remove(&w->last_panes, wp);
527 window_pane_stack_push(&w->last_panes, lastwp);
528
529 w->active = wp;
530 w->active->active_point = next_active_point++;
531 w->active->flags |= PANE_CHANGED;
532
533 if (options_get_number(global_options, "focus-events")) {
534 window_pane_update_focus(lastwp);
535 window_pane_update_focus(w->active);
536 }
537
538 tty_update_window_offset(w);
539
540 if (notify)
541 notify_window("window-pane-changed", w);
542 return (1);
543 }
544
545 static int
546 window_pane_get_palette(struct window_pane *wp, int c)
547 {
548 if (wp == NULL)
549 return (-1);
550 return (colour_palette_get(&wp->palette, c));
551 }
552
553 void
554 window_redraw_active_switch(struct window *w, struct window_pane *wp)
555 {
556 struct grid_cell *gc1, *gc2;
557 int c1, c2;
558
559 if (wp == w->active)
560 return;
561
562 for (;;) {
563 /*
564 * If the active and inactive styles or palettes are different,
565 * need to redraw the panes.
566 */
567 gc1 = &wp->cached_gc;
568 gc2 = &wp->cached_active_gc;
569 if (!grid_cells_look_equal(gc1, gc2))
570 wp->flags |= PANE_REDRAW;
571 else {
572 c1 = window_pane_get_palette(wp, gc1->fg);
573 c2 = window_pane_get_palette(wp, gc2->fg);
574 if (c1 != c2)
575 wp->flags |= PANE_REDRAW;
576 else {
577 c1 = window_pane_get_palette(wp, gc1->bg);
578 c2 = window_pane_get_palette(wp, gc2->bg);
579 if (c1 != c2)
580 wp->flags |= PANE_REDRAW;
581 }
582 }
583 if (wp == w->active)
584 break;
585 wp = w->active;
586 }
587 }
588
589 struct window_pane *
590 window_get_active_at(struct window *w, u_int x, u_int y)
591 {
592 struct window_pane *wp;
593
594 TAILQ_FOREACH(wp, &w->panes, entry) {
595 if (!window_pane_visible(wp))
596 continue;
597 if (x < wp->xoff || x > wp->xoff + wp->sx)
598 continue;
599 if (y < wp->yoff || y > wp->yoff + wp->sy)
600 continue;
601 return (wp);
602 }
603 return (NULL);
604 }
605
606 struct window_pane *
607 window_find_string(struct window *w, const char *s)
608 {
609 u_int x, y, top = 0, bottom = w->sy - 1;
610 int status;
611
612 x = w->sx / 2;
613 y = w->sy / 2;
614
615 status = options_get_number(w->options, "pane-border-status");
616 if (status == PANE_STATUS_TOP)
617 top++;
618 else if (status == PANE_STATUS_BOTTOM)
619 bottom--;
620
621 if (strcasecmp(s, "top") == 0)
622 y = top;
623 else if (strcasecmp(s, "bottom") == 0)
624 y = bottom;
625 else if (strcasecmp(s, "left") == 0)
626 x = 0;
627 else if (strcasecmp(s, "right") == 0)
628 x = w->sx - 1;
629 else if (strcasecmp(s, "top-left") == 0) {
630 x = 0;
631 y = top;
632 } else if (strcasecmp(s, "top-right") == 0) {
633 x = w->sx - 1;
634 y = top;
635 } else if (strcasecmp(s, "bottom-left") == 0) {
636 x = 0;
637 y = bottom;
638 } else if (strcasecmp(s, "bottom-right") == 0) {
639 x = w->sx - 1;
640 y = bottom;
641 } else
642 return (NULL);
643
644 return (window_get_active_at(w, x, y));
645 }
646
647 int
648 window_zoom(struct window_pane *wp)
649 {
650 struct window *w = wp->window;
651 struct window_pane *wp1;
652
653 if (w->flags & WINDOW_ZOOMED)
654 return (-1);
655
656 if (window_count_panes(w) == 1)
657 return (-1);
658
659 if (w->active != wp)
660 window_set_active_pane(w, wp, 1);
661
662 TAILQ_FOREACH(wp1, &w->panes, entry) {
663 wp1->saved_layout_cell = wp1->layout_cell;
664 wp1->layout_cell = NULL;
665 }
666
667 w->saved_layout_root = w->layout_root;
668 layout_init(w, wp);
669 w->flags |= WINDOW_ZOOMED;
670 notify_window("window-layout-changed", w);
671
672 return (0);
673 }
674
675 int
676 window_unzoom(struct window *w)
677 {
678 struct window_pane *wp;
679
680 if (!(w->flags & WINDOW_ZOOMED))
681 return (-1);
682
683 w->flags &= ~WINDOW_ZOOMED;
684 layout_free(w);
685 w->layout_root = w->saved_layout_root;
686 w->saved_layout_root = NULL;
687
688 TAILQ_FOREACH(wp, &w->panes, entry) {
689 wp->layout_cell = wp->saved_layout_cell;
690 wp->saved_layout_cell = NULL;
691 }
692 layout_fix_panes(w, NULL);
693 notify_window("window-layout-changed", w);
694
695 return (0);
696 }
697
698 int
699 window_push_zoom(struct window *w, int always, int flag)
700 {
701 log_debug("%s: @%u %d", __func__, w->id,
702 flag && (w->flags & WINDOW_ZOOMED));
703 if (flag && (always || (w->flags & WINDOW_ZOOMED)))
704 w->flags |= WINDOW_WASZOOMED;
705 else
706 w->flags &= ~WINDOW_WASZOOMED;
707 return (window_unzoom(w) == 0);
708 }
709
710 int
711 window_pop_zoom(struct window *w)
712 {
713 log_debug("%s: @%u %d", __func__, w->id,
714 !!(w->flags & WINDOW_WASZOOMED));
715 if (w->flags & WINDOW_WASZOOMED)
716 return (window_zoom(w->active) == 0);
717 return (0);
718 }
719
720 struct window_pane *
721 window_add_pane(struct window *w, struct window_pane *other, u_int hlimit,
722 int flags)
723 {
724 struct window_pane *wp;
725
726 if (other == NULL)
727 other = w->active;
728
729 wp = window_pane_create(w, w->sx, w->sy, hlimit);
730 if (TAILQ_EMPTY(&w->panes)) {
731 log_debug("%s: @%u at start", __func__, w->id);
732 TAILQ_INSERT_HEAD(&w->panes, wp, entry);
733 } else if (flags & SPAWN_BEFORE) {
734 log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
735 if (flags & SPAWN_FULLSIZE)
736 TAILQ_INSERT_HEAD(&w->panes, wp, entry);
737 else
738 TAILQ_INSERT_BEFORE(other, wp, entry);
739 } else {
740 log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
741 if (flags & SPAWN_FULLSIZE)
742 TAILQ_INSERT_TAIL(&w->panes, wp, entry);
743 else
744 TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
745 }
746 return (wp);
747 }
748
749 void
750 window_lost_pane(struct window *w, struct window_pane *wp)
751 {
752 log_debug("%s: @%u pane %%%u", __func__, w->id, wp->id);
753
754 if (wp == marked_pane.wp)
755 server_clear_marked();
756
757 window_pane_stack_remove(&w->last_panes, wp);
758 if (wp == w->active) {
759 w->active = TAILQ_FIRST(&w->last_panes);
760 if (w->active == NULL) {
761 w->active = TAILQ_PREV(wp, window_panes, entry);
762 if (w->active == NULL)
763 w->active = TAILQ_NEXT(wp, entry);
764 }
765 if (w->active != NULL) {
766 window_pane_stack_remove(&w->last_panes, w->active);
767 w->active->flags |= PANE_CHANGED;
768 notify_window("window-pane-changed", w);
769 window_update_focus(w);
770 }
771 }
772 }
773
774 void
775 window_remove_pane(struct window *w, struct window_pane *wp)
776 {
777 window_lost_pane(w, wp);
778
779 TAILQ_REMOVE(&w->panes, wp, entry);
780 window_pane_destroy(wp);
781 }
782
783 struct window_pane *
784 window_pane_at_index(struct window *w, u_int idx)
785 {
786 struct window_pane *wp;
787 u_int n;
788
789 n = options_get_number(w->options, "pane-base-index");
790 TAILQ_FOREACH(wp, &w->panes, entry) {
791 if (n == idx)
792 return (wp);
793 n++;
794 }
795 return (NULL);
796 }
797
798 struct window_pane *
799 window_pane_next_by_number(struct window *w, struct window_pane *wp, u_int n)
800 {
801 for (; n > 0; n--) {
802 if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
803 wp = TAILQ_FIRST(&w->panes);
804 }
805
806 return (wp);
807 }
808
809 struct window_pane *
810 window_pane_previous_by_number(struct window *w, struct window_pane *wp,
811 u_int n)
812 {
813 for (; n > 0; n--) {
814 if ((wp = TAILQ_PREV(wp, window_panes, entry)) == NULL)
815 wp = TAILQ_LAST(&w->panes, window_panes);
816 }
817
818 return (wp);
819 }
820
821 int
822 window_pane_index(struct window_pane *wp, u_int *i)
823 {
824 struct window_pane *wq;
825 struct window *w = wp->window;
826
827 *i = options_get_number(w->options, "pane-base-index");
828 TAILQ_FOREACH(wq, &w->panes, entry) {
829 if (wp == wq) {
830 return (0);
831 }
832 (*i)++;
833 }
834
835 return (-1);
836 }
837
838 u_int
839 window_count_panes(struct window *w)
840 {
841 struct window_pane *wp;
842 u_int n;
843
844 n = 0;
845 TAILQ_FOREACH(wp, &w->panes, entry)
846 n++;
847 return (n);
848 }
849
850 void
851 window_destroy_panes(struct window *w)
852 {
853 struct window_pane *wp;
854
855 while (!TAILQ_EMPTY(&w->last_panes)) {
856 wp = TAILQ_FIRST(&w->last_panes);
857 window_pane_stack_remove(&w->last_panes, wp);
858 }
859
860 while (!TAILQ_EMPTY(&w->panes)) {
861 wp = TAILQ_FIRST(&w->panes);
862 TAILQ_REMOVE(&w->panes, wp, entry);
863 window_pane_destroy(wp);
864 }
865 }
866
867 const char *
868 window_printable_flags(struct winlink *wl, int escape)
869 {
870 struct session *s = wl->session;
871 static char flags[32];
872 int pos;
873
874 pos = 0;
875 if (wl->flags & WINLINK_ACTIVITY) {
876 flags[pos++] = '#';
877 if (escape)
878 flags[pos++] = '#';
879 }
880 if (wl->flags & WINLINK_BELL)
881 flags[pos++] = '!';
882 if (wl->flags & WINLINK_SILENCE)
883 flags[pos++] = '~';
884 if (wl == s->curw)
885 flags[pos++] = '*';
886 if (wl == TAILQ_FIRST(&s->lastw))
887 flags[pos++] = '-';
888 if (server_check_marked() && wl == marked_pane.wl)
889 flags[pos++] = 'M';
890 if (wl->window->flags & WINDOW_ZOOMED)
891 flags[pos++] = 'Z';
892 flags[pos] = '\0';
893 return (flags);
894 }
895
896 struct window_pane *
897 window_pane_find_by_id_str(const char *s)
898 {
899 const char *errstr;
900 u_int id;
901
902 if (*s != '%')
903 return (NULL);
904
905 id = strtonum(s + 1, 0, UINT_MAX, &errstr);
906 if (errstr != NULL)
907 return (NULL);
908 return (window_pane_find_by_id(id));
909 }
910
911 struct window_pane *
912 window_pane_find_by_id(u_int id)
913 {
914 struct window_pane wp;
915
916 wp.id = id;
917 return (RB_FIND(window_pane_tree, &all_window_panes, &wp));
918 }
919
920 static struct window_pane *
921 window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
922 {
923 struct window_pane *wp;
924 char host[HOST_NAME_MAX + 1];
925
926 wp = xcalloc(1, sizeof *wp);
927 wp->window = w;
928 wp->options = options_create(w->options);
929 wp->flags = PANE_STYLECHANGED;
930
931 wp->id = next_window_pane_id++;
932 RB_INSERT(window_pane_tree, &all_window_panes, wp);
933
934 wp->fd = -1;
935
936 TAILQ_INIT(&wp->modes);
937
938 TAILQ_INIT (&wp->resize_queue);
939
940 wp->sx = sx;
941 wp->sy = sy;
942
943 wp->pipe_fd = -1;
944
945 colour_palette_init(&wp->palette);
946 colour_palette_from_option(&wp->palette, wp->options);
947
948 screen_init(&wp->base, sx, sy, hlimit);
949 wp->screen = &wp->base;
950 window_pane_default_cursor(wp);
951
952 screen_init(&wp->status_screen, 1, 1, 0);
953
954 if (gethostname(host, sizeof host) == 0)
955 screen_set_title(&wp->base, host);
956
957 return (wp);
958 }
959
960 static void
961 window_pane_destroy(struct window_pane *wp)
962 {
963 struct window_pane_resize *r;
964 struct window_pane_resize *r1;
965
966 window_pane_reset_mode_all(wp);
967 free(wp->searchstr);
968
969 if (wp->fd != -1) {
970 #ifdef HAVE_UTEMPTER
971 utempter_remove_record(wp->fd);
972 #endif
973 bufferevent_free(wp->event);
974 close(wp->fd);
975 }
976 if (wp->ictx != NULL)
977 input_free(wp->ictx);
978
979 screen_free(&wp->status_screen);
980
981 screen_free(&wp->base);
982
983 if (wp->pipe_fd != -1) {
984 bufferevent_free(wp->pipe_event);
985 close(wp->pipe_fd);
986 }
987
988 if (event_initialized(&wp->resize_timer))
989 event_del(&wp->resize_timer);
990 TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1) {
991 TAILQ_REMOVE(&wp->resize_queue, r, entry);
992 free(r);
993 }
994
995 RB_REMOVE(window_pane_tree, &all_window_panes, wp);
996
997 options_free(wp->options);
998 free((void *)wp->cwd);
999 free(wp->shell);
1000 cmd_free_argv(wp->argc, wp->argv);
1001 colour_palette_free(&wp->palette);
1002 free(wp);
1003 }
1004
1005 static void
1006 window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
1007 {
1008 struct window_pane *wp = data;
1009 struct evbuffer *evb = wp->event->input;
1010 struct window_pane_offset *wpo = &wp->pipe_offset;
1011 size_t size = EVBUFFER_LENGTH(evb);
1012 char *new_data;
1013 size_t new_size;
1014 struct client *c;
1015
1016 if (wp->pipe_fd != -1) {
1017 new_data = window_pane_get_new_data(wp, wpo, &new_size);
1018 if (new_size > 0) {
1019 bufferevent_write(wp->pipe_event, new_data, new_size);
1020 window_pane_update_used_data(wp, wpo, new_size);
1021 }
1022 }
1023
1024 log_debug("%%%u has %zu bytes", wp->id, size);
1025 TAILQ_FOREACH(c, &clients, entry) {
1026 if (c->session != NULL && (c->flags & CLIENT_CONTROL))
1027 control_write_output(c, wp);
1028 }
1029 input_parse_pane(wp);
1030 bufferevent_disable(wp->event, EV_READ);
1031 }
1032
1033 static void
1034 window_pane_error_callback(__unused struct bufferevent *bufev,
1035 __unused short what, void *data)
1036 {
1037 struct window_pane *wp = data;
1038
1039 log_debug("%%%u error", wp->id);
1040 wp->flags |= PANE_EXITED;
1041
1042 if (window_pane_destroy_ready(wp))
1043 server_destroy_pane(wp, 1);
1044 }
1045
1046 void
1047 window_pane_set_event(struct window_pane *wp)
1048 {
1049 setblocking(wp->fd, 0);
1050
1051 wp->event = bufferevent_new(wp->fd, window_pane_read_callback,
1052 NULL, window_pane_error_callback, wp);
1053 if (wp->event == NULL)
1054 fatalx("out of memory");
1055 wp->ictx = input_init(wp, wp->event, &wp->palette);
1056
1057 bufferevent_enable(wp->event, EV_READ|EV_WRITE);
1058 }
1059
1060 void
1061 window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
1062 {
1063 struct window_mode_entry *wme;
1064 struct window_pane_resize *r;
1065
1066 if (sx == wp->sx && sy == wp->sy)
1067 return;
1068
1069 r = xmalloc(sizeof *r);
1070 r->sx = sx;
1071 r->sy = sy;
1072 r->osx = wp->sx;
1073 r->osy = wp->sy;
1074 TAILQ_INSERT_TAIL (&wp->resize_queue, r, entry);
1075
1076 wp->sx = sx;
1077 wp->sy = sy;
1078
1079 log_debug("%s: %%%u resize %ux%u", __func__, wp->id, sx, sy);
1080 screen_resize(&wp->base, sx, sy, wp->base.saved_grid == NULL);
1081
1082 wme = TAILQ_FIRST(&wp->modes);
1083 if (wme != NULL && wme->mode->resize != NULL)
1084 wme->mode->resize(wme, sx, sy);
1085 }
1086
1087 int
1088 window_pane_set_mode(struct window_pane *wp, struct window_pane *swp,
1089 const struct window_mode *mode, struct cmd_find_state *fs,
1090 struct args *args)
1091 {
1092 struct window_mode_entry *wme;
1093
1094 if (!TAILQ_EMPTY(&wp->modes) && TAILQ_FIRST(&wp->modes)->mode == mode)
1095 return (1);
1096
1097 TAILQ_FOREACH(wme, &wp->modes, entry) {
1098 if (wme->mode == mode)
1099 break;
1100 }
1101 if (wme != NULL) {
1102 TAILQ_REMOVE(&wp->modes, wme, entry);
1103 TAILQ_INSERT_HEAD(&wp->modes, wme, entry);
1104 } else {
1105 wme = xcalloc(1, sizeof *wme);
1106 wme->wp = wp;
1107 wme->swp = swp;
1108 wme->mode = mode;
1109 wme->prefix = 1;
1110 TAILQ_INSERT_HEAD(&wp->modes, wme, entry);
1111 wme->screen = wme->mode->init(wme, fs, args);
1112 }
1113
1114 wp->screen = wme->screen;
1115 wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1116
1117 server_redraw_window_borders(wp->window);
1118 server_status_window(wp->window);
1119 notify_pane("pane-mode-changed", wp);
1120
1121 return (0);
1122 }
1123
1124 void
1125 window_pane_reset_mode(struct window_pane *wp)
1126 {
1127 struct window_mode_entry *wme, *next;
1128
1129 if (TAILQ_EMPTY(&wp->modes))
1130 return;
1131
1132 wme = TAILQ_FIRST(&wp->modes);
1133 TAILQ_REMOVE(&wp->modes, wme, entry);
1134 wme->mode->free(wme);
1135 free(wme);
1136
1137 next = TAILQ_FIRST(&wp->modes);
1138 if (next == NULL) {
1139 wp->flags &= ~PANE_UNSEENCHANGES;
1140 log_debug("%s: no next mode", __func__);
1141 wp->screen = &wp->base;
1142 } else {
1143 log_debug("%s: next mode is %s", __func__, next->mode->name);
1144 wp->screen = next->screen;
1145 if (next->mode->resize != NULL)
1146 next->mode->resize(next, wp->sx, wp->sy);
1147 }
1148 wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1149
1150 server_redraw_window_borders(wp->window);
1151 server_status_window(wp->window);
1152 notify_pane("pane-mode-changed", wp);
1153 }
1154
1155 void
1156 window_pane_reset_mode_all(struct window_pane *wp)
1157 {
1158 while (!TAILQ_EMPTY(&wp->modes))
1159 window_pane_reset_mode(wp);
1160 }
1161
1162 static void
1163 window_pane_copy_key(struct window_pane *wp, key_code key)
1164 {
1165 struct window_pane *loop;
1166
1167 TAILQ_FOREACH(loop, &wp->window->panes, entry) {
1168 if (loop != wp &&
1169 TAILQ_EMPTY(&loop->modes) &&
1170 loop->fd != -1 &&
1171 (~loop->flags & PANE_INPUTOFF) &&
1172 window_pane_visible(loop) &&
1173 options_get_number(loop->options, "synchronize-panes"))
1174 input_key_pane(loop, key, NULL);
1175 }
1176 }
1177
1178 int
1179 window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
1180 struct winlink *wl, key_code key, struct mouse_event *m)
1181 {
1182 struct window_mode_entry *wme;
1183
1184 if (KEYC_IS_MOUSE(key) && m == NULL)
1185 return (-1);
1186
1187 wme = TAILQ_FIRST(&wp->modes);
1188 if (wme != NULL) {
1189 if (wme->mode->key != NULL && c != NULL) {
1190 key &= ~KEYC_MASK_FLAGS;
1191 wme->mode->key(wme, c, s, wl, key, m);
1192 }
1193 return (0);
1194 }
1195
1196 if (wp->fd == -1 || wp->flags & PANE_INPUTOFF)
1197 return (0);
1198
1199 if (input_key_pane(wp, key, m) != 0)
1200 return (-1);
1201
1202 if (KEYC_IS_MOUSE(key))
1203 return (0);
1204 if (options_get_number(wp->options, "synchronize-panes"))
1205 window_pane_copy_key(wp, key);
1206 return (0);
1207 }
1208
1209 int
1210 window_pane_visible(struct window_pane *wp)
1211 {
1212 if (~wp->window->flags & WINDOW_ZOOMED)
1213 return (1);
1214 return (wp == wp->window->active);
1215 }
1216
1217 u_int
1218 window_pane_search(struct window_pane *wp, const char *term, int regex,
1219 int ignore)
1220 {
1221 struct screen *s = &wp->base;
1222 regex_t r;
1223 char *new = NULL, *line;
1224 u_int i;
1225 int flags = 0, found;
1226 size_t n;
1227
1228 if (!regex) {
1229 if (ignore)
1230 flags |= FNM_CASEFOLD;
1231 xasprintf(&new, "*%s*", term);
1232 } else {
1233 if (ignore)
1234 flags |= REG_ICASE;
1235 if (regcomp(&r, term, flags|REG_EXTENDED) != 0)
1236 return (0);
1237 }
1238
1239 for (i = 0; i < screen_size_y(s); i++) {
1240 line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
1241 for (n = strlen(line); n > 0; n--) {
1242 if (!isspace((u_char)line[n - 1]))
1243 break;
1244 line[n - 1] = '\0';
1245 }
1246 log_debug("%s: %s", __func__, line);
1247 if (!regex)
1248 found = (fnmatch(new, line, flags) == 0);
1249 else
1250 found = (regexec(&r, line, 0, NULL, 0) == 0);
1251 free(line);
1252 if (found)
1253 break;
1254 }
1255 if (!regex)
1256 free(new);
1257 else
1258 regfree(&r);
1259
1260 if (i == screen_size_y(s))
1261 return (0);
1262 return (i + 1);
1263 }
1264
1265 /* Get MRU pane from a list. */
1266 static struct window_pane *
1267 window_pane_choose_best(struct window_pane **list, u_int size)
1268 {
1269 struct window_pane *next, *best;
1270 u_int i;
1271
1272 if (size == 0)
1273 return (NULL);
1274
1275 best = list[0];
1276 for (i = 1; i < size; i++) {
1277 next = list[i];
1278 if (next->active_point > best->active_point)
1279 best = next;
1280 }
1281 return (best);
1282 }
1283
1284 /*
1285 * Find the pane directly above another. We build a list of those adjacent to
1286 * top edge and then choose the best.
1287 */
1288 struct window_pane *
1289 window_pane_find_up(struct window_pane *wp)
1290 {
1291 struct window *w;
1292 struct window_pane *next, *best, **list;
1293 u_int edge, left, right, end, size;
1294 int status, found;
1295
1296 if (wp == NULL)
1297 return (NULL);
1298 w = wp->window;
1299 status = options_get_number(w->options, "pane-border-status");
1300
1301 list = NULL;
1302 size = 0;
1303
1304 edge = wp->yoff;
1305 if (status == PANE_STATUS_TOP) {
1306 if (edge == 1)
1307 edge = w->sy + 1;
1308 } else if (status == PANE_STATUS_BOTTOM) {
1309 if (edge == 0)
1310 edge = w->sy;
1311 } else {
1312 if (edge == 0)
1313 edge = w->sy + 1;
1314 }
1315
1316 left = wp->xoff;
1317 right = wp->xoff + wp->sx;
1318
1319 TAILQ_FOREACH(next, &w->panes, entry) {
1320 if (next == wp)
1321 continue;
1322 if (next->yoff + next->sy + 1 != edge)
1323 continue;
1324 end = next->xoff + next->sx - 1;
1325
1326 found = 0;
1327 if (next->xoff < left && end > right)
1328 found = 1;
1329 else if (next->xoff >= left && next->xoff <= right)
1330 found = 1;
1331 else if (end >= left && end <= right)
1332 found = 1;
1333 if (!found)
1334 continue;
1335 list = xreallocarray(list, size + 1, sizeof *list);
1336 list[size++] = next;
1337 }
1338
1339 best = window_pane_choose_best(list, size);
1340 free(list);
1341 return (best);
1342 }
1343
1344 /* Find the pane directly below another. */
1345 struct window_pane *
1346 window_pane_find_down(struct window_pane *wp)
1347 {
1348 struct window *w;
1349 struct window_pane *next, *best, **list;
1350 u_int edge, left, right, end, size;
1351 int status, found;
1352
1353 if (wp == NULL)
1354 return (NULL);
1355 w = wp->window;
1356 status = options_get_number(w->options, "pane-border-status");
1357
1358 list = NULL;
1359 size = 0;
1360
1361 edge = wp->yoff + wp->sy + 1;
1362 if (status == PANE_STATUS_TOP) {
1363 if (edge >= w->sy)
1364 edge = 1;
1365 } else if (status == PANE_STATUS_BOTTOM) {
1366 if (edge >= w->sy - 1)
1367 edge = 0;
1368 } else {
1369 if (edge >= w->sy)
1370 edge = 0;
1371 }
1372
1373 left = wp->xoff;
1374 right = wp->xoff + wp->sx;
1375
1376 TAILQ_FOREACH(next, &w->panes, entry) {
1377 if (next == wp)
1378 continue;
1379 if (next->yoff != edge)
1380 continue;
1381 end = next->xoff + next->sx - 1;
1382
1383 found = 0;
1384 if (next->xoff < left && end > right)
1385 found = 1;
1386 else if (next->xoff >= left && next->xoff <= right)
1387 found = 1;
1388 else if (end >= left && end <= right)
1389 found = 1;
1390 if (!found)
1391 continue;
1392 list = xreallocarray(list, size + 1, sizeof *list);
1393 list[size++] = next;
1394 }
1395
1396 best = window_pane_choose_best(list, size);
1397 free(list);
1398 return (best);
1399 }
1400
1401 /* Find the pane directly to the left of another. */
1402 struct window_pane *
1403 window_pane_find_left(struct window_pane *wp)
1404 {
1405 struct window *w;
1406 struct window_pane *next, *best, **list;
1407 u_int edge, top, bottom, end, size;
1408 int found;
1409
1410 if (wp == NULL)
1411 return (NULL);
1412 w = wp->window;
1413
1414 list = NULL;
1415 size = 0;
1416
1417 edge = wp->xoff;
1418 if (edge == 0)
1419 edge = w->sx + 1;
1420
1421 top = wp->yoff;
1422 bottom = wp->yoff + wp->sy;
1423
1424 TAILQ_FOREACH(next, &w->panes, entry) {
1425 if (next == wp)
1426 continue;
1427 if (next->xoff + next->sx + 1 != edge)
1428 continue;
1429 end = next->yoff + next->sy - 1;
1430
1431 found = 0;
1432 if (next->yoff < top && end > bottom)
1433 found = 1;
1434 else if (next->yoff >= top && next->yoff <= bottom)
1435 found = 1;
1436 else if (end >= top && end <= bottom)
1437 found = 1;
1438 if (!found)
1439 continue;
1440 list = xreallocarray(list, size + 1, sizeof *list);
1441 list[size++] = next;
1442 }
1443
1444 best = window_pane_choose_best(list, size);
1445 free(list);
1446 return (best);
1447 }
1448
1449 /* Find the pane directly to the right of another. */
1450 struct window_pane *
1451 window_pane_find_right(struct window_pane *wp)
1452 {
1453 struct window *w;
1454 struct window_pane *next, *best, **list;
1455 u_int edge, top, bottom, end, size;
1456 int found;
1457
1458 if (wp == NULL)
1459 return (NULL);
1460 w = wp->window;
1461
1462 list = NULL;
1463 size = 0;
1464
1465 edge = wp->xoff + wp->sx + 1;
1466 if (edge >= w->sx)
1467 edge = 0;
1468
1469 top = wp->yoff;
1470 bottom = wp->yoff + wp->sy;
1471
1472 TAILQ_FOREACH(next, &w->panes, entry) {
1473 if (next == wp)
1474 continue;
1475 if (next->xoff != edge)
1476 continue;
1477 end = next->yoff + next->sy - 1;
1478
1479 found = 0;
1480 if (next->yoff < top && end > bottom)
1481 found = 1;
1482 else if (next->yoff >= top && next->yoff <= bottom)
1483 found = 1;
1484 else if (end >= top && end <= bottom)
1485 found = 1;
1486 if (!found)
1487 continue;
1488 list = xreallocarray(list, size + 1, sizeof *list);
1489 list[size++] = next;
1490 }
1491
1492 best = window_pane_choose_best(list, size);
1493 free(list);
1494 return (best);
1495 }
1496
1497 void
1498 window_pane_stack_push(struct window_panes *stack, struct window_pane *wp)
1499 {
1500 if (wp != NULL) {
1501 window_pane_stack_remove(stack, wp);
1502 TAILQ_INSERT_HEAD(stack, wp, sentry);
1503 wp->flags |= PANE_VISITED;
1504 }
1505 }
1506
1507 void
1508 window_pane_stack_remove(struct window_panes *stack, struct window_pane *wp)
1509 {
1510 if (wp != NULL && (wp->flags & PANE_VISITED)) {
1511 TAILQ_REMOVE(stack, wp, sentry);
1512 wp->flags &= ~PANE_VISITED;
1513 }
1514 }
1515
1516 /* Clear alert flags for a winlink */
1517 void
1518 winlink_clear_flags(struct winlink *wl)
1519 {
1520 struct winlink *loop;
1521
1522 wl->window->flags &= ~WINDOW_ALERTFLAGS;
1523 TAILQ_FOREACH(loop, &wl->window->winlinks, wentry) {
1524 if ((loop->flags & WINLINK_ALERTFLAGS) != 0) {
1525 loop->flags &= ~WINLINK_ALERTFLAGS;
1526 server_status_session(loop->session);
1527 }
1528 }
1529 }
1530
1531 /* Shuffle window indexes up. */
1532 int
1533 winlink_shuffle_up(struct session *s, struct winlink *wl, int before)
1534 {
1535 int idx, last;
1536
1537 if (wl == NULL)
1538 return (-1);
1539 if (before)
1540 idx = wl->idx;
1541 else
1542 idx = wl->idx + 1;
1543
1544 /* Find the next free index. */
1545 for (last = idx; last < INT_MAX; last++) {
1546 if (winlink_find_by_index(&s->windows, last) == NULL)
1547 break;
1548 }
1549 if (last == INT_MAX)
1550 return (-1);
1551
1552 /* Move everything from last - 1 to idx up a bit. */
1553 for (; last > idx; last--) {
1554 wl = winlink_find_by_index(&s->windows, last - 1);
1555 RB_REMOVE(winlinks, &s->windows, wl);
1556 wl->idx++;
1557 RB_INSERT(winlinks, &s->windows, wl);
1558 }
1559
1560 return (idx);
1561 }
1562
1563 static void
1564 window_pane_input_callback(struct client *c, __unused const char *path,
1565 int error, int closed, struct evbuffer *buffer, void *data)
1566 {
1567 struct window_pane_input_data *cdata = data;
1568 struct window_pane *wp;
1569 u_char *buf = EVBUFFER_DATA(buffer);
1570 size_t len = EVBUFFER_LENGTH(buffer);
1571
1572 wp = window_pane_find_by_id(cdata->wp);
1573 if (cdata->file != NULL && (wp == NULL || c->flags & CLIENT_DEAD)) {
1574 if (wp == NULL) {
1575 c->retval = 1;
1576 c->flags |= CLIENT_EXIT;
1577 }
1578 file_cancel(cdata->file);
1579 } else if (cdata->file == NULL || closed || error != 0) {
1580 cmdq_continue(cdata->item);
1581 server_client_unref(c);
1582 free(cdata);
1583 } else
1584 input_parse_buffer(wp, buf, len);
1585 evbuffer_drain(buffer, len);
1586 }
1587
1588 int
1589 window_pane_start_input(struct window_pane *wp, struct cmdq_item *item,
1590 char **cause)
1591 {
1592 struct client *c = cmdq_get_client(item);
1593 struct window_pane_input_data *cdata;
1594
1595 if (~wp->flags & PANE_EMPTY) {
1596 *cause = xstrdup("pane is not empty");
1597 return (-1);
1598 }
1599 if (c->flags & (CLIENT_DEAD|CLIENT_EXITED))
1600 return (1);
1601 if (c->session != NULL)
1602 return (1);
1603
1604 cdata = xmalloc(sizeof *cdata);
1605 cdata->item = item;
1606 cdata->wp = wp->id;
1607 cdata->file = file_read(c, "-", window_pane_input_callback, cdata);
1608 c->references++;
1609
1610 return (0);
1611 }
1612
1613 void *
1614 window_pane_get_new_data(struct window_pane *wp,
1615 struct window_pane_offset *wpo, size_t *size)
1616 {
1617 size_t used = wpo->used - wp->base_offset;
1618
1619 *size = EVBUFFER_LENGTH(wp->event->input) - used;
1620 return (EVBUFFER_DATA(wp->event->input) + used);
1621 }
1622
1623 void
1624 window_pane_update_used_data(struct window_pane *wp,
1625 struct window_pane_offset *wpo, size_t size)
1626 {
1627 size_t used = wpo->used - wp->base_offset;
1628
1629 if (size > EVBUFFER_LENGTH(wp->event->input) - used)
1630 size = EVBUFFER_LENGTH(wp->event->input) - used;
1631 wpo->used += size;
1632 }
1633
1634 void
1635 window_set_fill_character(struct window *w)
1636 {
1637 const char *value;
1638 struct utf8_data *ud;
1639
1640 free(w->fill_character);
1641 w->fill_character = NULL;
1642
1643 value = options_get_string(w->options, "fill-character");
1644 if (*value != '\0' && utf8_isvalid(value)) {
1645 ud = utf8_fromcstr(value);
1646 if (ud != NULL && ud[0].width == 1)
1647 w->fill_character = ud;
1648 }
1649 }
1650
1651 void
1652 window_pane_default_cursor(struct window_pane *wp)
1653 {
1654 struct screen *s = wp->screen;
1655 int c;
1656
1657 c = options_get_number(wp->options, "cursor-colour");
1658 s->default_ccolour = c;
1659
1660 c = options_get_number(wp->options, "cursor-style");
1661 s->default_mode = 0;
1662 screen_set_cursor_style(c, &s->default_cstyle, &s->default_mode);
1663 }
tmux -- terminal multiplexer similar to GNU Screen