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Do not notify window-layout-changed if the window is about to be
[tmux-openbsd.git] / window.c
blob43c272bc8e13262fc54c233dbb70bcc3ccb60360
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 #include <util.h>
34 #include <vis.h>
35
36 #include "tmux.h"
37
38 /*
39 * Each window is attached to a number of panes, each of which is a pty. This
40 * file contains code to handle them.
41 *
42 * A pane has two buffers attached, these are filled and emptied by the main
43 * server poll loop. Output data is received from pty's in screen format,
44 * translated and returned as a series of escape sequences and strings via
45 * input_parse (in input.c). Input data is received as key codes and written
46 * directly via input_key.
47 *
48 * Each pane also has a "virtual" screen (screen.c) which contains the current
49 * state and is redisplayed when the window is reattached to a client.
50 *
51 * Windows are stored directly on a global array and wrapped in any number of
52 * winlink structs to be linked onto local session RB trees. A reference count
53 * is maintained and a window removed from the global list and destroyed when
54 * it reaches zero.
55 */
56
57 /* Global window list. */
58 struct windows windows;
59
60 /* Global panes tree. */
61 struct window_pane_tree all_window_panes;
62 static u_int next_window_pane_id;
63 static u_int next_window_id;
64 static u_int next_active_point;
65
66 struct window_pane_input_data {
67 struct cmdq_item *item;
68 u_int wp;
69 struct client_file *file;
70 };
71
72 static struct window_pane *window_pane_create(struct window *, u_int, u_int,
73 u_int);
74 static void window_pane_destroy(struct window_pane *);
75
76 RB_GENERATE(windows, window, entry, window_cmp);
77 RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
78 RB_GENERATE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
79
80 int
81 window_cmp(struct window *w1, struct window *w2)
82 {
83 return (w1->id - w2->id);
84 }
85
86 int
87 winlink_cmp(struct winlink *wl1, struct winlink *wl2)
88 {
89 return (wl1->idx - wl2->idx);
90 }
91
92 int
93 window_pane_cmp(struct window_pane *wp1, struct window_pane *wp2)
94 {
95 return (wp1->id - wp2->id);
96 }
97
98 struct winlink *
99 winlink_find_by_window(struct winlinks *wwl, struct window *w)
100 {
101 struct winlink *wl;
102
103 RB_FOREACH(wl, winlinks, wwl) {
104 if (wl->window == w)
105 return (wl);
106 }
107
108 return (NULL);
109 }
110
111 struct winlink *
112 winlink_find_by_index(struct winlinks *wwl, int idx)
113 {
114 struct winlink wl;
115
116 if (idx < 0)
117 fatalx("bad index");
118
119 wl.idx = idx;
120 return (RB_FIND(winlinks, wwl, &wl));
121 }
122
123 struct winlink *
124 winlink_find_by_window_id(struct winlinks *wwl, u_int id)
125 {
126 struct winlink *wl;
127
128 RB_FOREACH(wl, winlinks, wwl) {
129 if (wl->window->id == id)
130 return (wl);
131 }
132 return (NULL);
133 }
134
135 static int
136 winlink_next_index(struct winlinks *wwl, int idx)
137 {
138 int i;
139
140 i = idx;
141 do {
142 if (winlink_find_by_index(wwl, i) == NULL)
143 return (i);
144 if (i == INT_MAX)
145 i = 0;
146 else
147 i++;
148 } while (i != idx);
149 return (-1);
150 }
151
152 u_int
153 winlink_count(struct winlinks *wwl)
154 {
155 struct winlink *wl;
156 u_int n;
157
158 n = 0;
159 RB_FOREACH(wl, winlinks, wwl)
160 n++;
161
162 return (n);
163 }
164
165 struct winlink *
166 winlink_add(struct winlinks *wwl, int idx)
167 {
168 struct winlink *wl;
169
170 if (idx < 0) {
171 if ((idx = winlink_next_index(wwl, -idx - 1)) == -1)
172 return (NULL);
173 } else if (winlink_find_by_index(wwl, idx) != NULL)
174 return (NULL);
175
176 wl = xcalloc(1, sizeof *wl);
177 wl->idx = idx;
178 RB_INSERT(winlinks, wwl, wl);
179
180 return (wl);
181 }
182
183 void
184 winlink_set_window(struct winlink *wl, struct window *w)
185 {
186 if (wl->window != NULL) {
187 TAILQ_REMOVE(&wl->window->winlinks, wl, wentry);
188 window_remove_ref(wl->window, __func__);
189 }
190 TAILQ_INSERT_TAIL(&w->winlinks, wl, wentry);
191 wl->window = w;
192 window_add_ref(w, __func__);
193 }
194
195 void
196 winlink_remove(struct winlinks *wwl, struct winlink *wl)
197 {
198 struct window *w = wl->window;
199
200 if (w != NULL) {
201 TAILQ_REMOVE(&w->winlinks, wl, wentry);
202 window_remove_ref(w, __func__);
203 }
204
205 RB_REMOVE(winlinks, wwl, wl);
206 free(wl);
207 }
208
209 struct winlink *
210 winlink_next(struct winlink *wl)
211 {
212 return (RB_NEXT(winlinks, wwl, wl));
213 }
214
215 struct winlink *
216 winlink_previous(struct winlink *wl)
217 {
218 return (RB_PREV(winlinks, wwl, wl));
219 }
220
221 struct winlink *
222 winlink_next_by_number(struct winlink *wl, struct session *s, int n)
223 {
224 for (; n > 0; n--) {
225 if ((wl = RB_NEXT(winlinks, wwl, wl)) == NULL)
226 wl = RB_MIN(winlinks, &s->windows);
227 }
228
229 return (wl);
230 }
231
232 struct winlink *
233 winlink_previous_by_number(struct winlink *wl, struct session *s, int n)
234 {
235 for (; n > 0; n--) {
236 if ((wl = RB_PREV(winlinks, wwl, wl)) == NULL)
237 wl = RB_MAX(winlinks, &s->windows);
238 }
239
240 return (wl);
241 }
242
243 void
244 winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
245 {
246 if (wl == NULL)
247 return;
248
249 winlink_stack_remove(stack, wl);
250 TAILQ_INSERT_HEAD(stack, wl, sentry);
251 wl->flags |= WINLINK_VISITED;
252 }
253
254 void
255 winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
256 {
257 if (wl != NULL && (wl->flags & WINLINK_VISITED)) {
258 TAILQ_REMOVE(stack, wl, sentry);
259 wl->flags &= ~WINLINK_VISITED;
260 }
261 }
262
263 struct window *
264 window_find_by_id_str(const char *s)
265 {
266 const char *errstr;
267 u_int id;
268
269 if (*s != '@')
270 return (NULL);
271
272 id = strtonum(s + 1, 0, UINT_MAX, &errstr);
273 if (errstr != NULL)
274 return (NULL);
275 return (window_find_by_id(id));
276 }
277
278 struct window *
279 window_find_by_id(u_int id)
280 {
281 struct window w;
282
283 w.id = id;
284 return (RB_FIND(windows, &windows, &w));
285 }
286
287 void
288 window_update_activity(struct window *w)
289 {
290 gettimeofday(&w->activity_time, NULL);
291 alerts_queue(w, WINDOW_ACTIVITY);
292 }
293
294 struct window *
295 window_create(u_int sx, u_int sy, u_int xpixel, u_int ypixel)
296 {
297 struct window *w;
298
299 if (xpixel == 0)
300 xpixel = DEFAULT_XPIXEL;
301 if (ypixel == 0)
302 ypixel = DEFAULT_YPIXEL;
303
304 w = xcalloc(1, sizeof *w);
305 w->name = xstrdup("");
306 w->flags = 0;
307
308 TAILQ_INIT(&w->panes);
309 TAILQ_INIT(&w->last_panes);
310 w->active = NULL;
311
312 w->lastlayout = -1;
313 w->layout_root = NULL;
314
315 w->sx = sx;
316 w->sy = sy;
317 w->manual_sx = sx;
318 w->manual_sy = sy;
319 w->xpixel = xpixel;
320 w->ypixel = ypixel;
321
322 w->options = options_create(global_w_options);
323
324 w->references = 0;
325 TAILQ_INIT(&w->winlinks);
326
327 w->id = next_window_id++;
328 RB_INSERT(windows, &windows, w);
329
330 window_set_fill_character(w);
331 window_update_activity(w);
332
333 log_debug("%s: @%u create %ux%u (%ux%u)", __func__, w->id, sx, sy,
334 w->xpixel, w->ypixel);
335 return (w);
336 }
337
338 static void
339 window_destroy(struct window *w)
340 {
341 log_debug("window @%u destroyed (%d references)", w->id, w->references);
342
343 window_unzoom(w, 0);
344 RB_REMOVE(windows, &windows, w);
345
346 if (w->layout_root != NULL)
347 layout_free_cell(w->layout_root);
348 if (w->saved_layout_root != NULL)
349 layout_free_cell(w->saved_layout_root);
350 free(w->old_layout);
351
352 window_destroy_panes(w);
353
354 if (event_initialized(&w->name_event))
355 evtimer_del(&w->name_event);
356
357 if (event_initialized(&w->alerts_timer))
358 evtimer_del(&w->alerts_timer);
359 if (event_initialized(&w->offset_timer))
360 event_del(&w->offset_timer);
361
362 options_free(w->options);
363 free(w->fill_character);
364
365 free(w->name);
366 free(w);
367 }
368
369 int
370 window_pane_destroy_ready(struct window_pane *wp)
371 {
372 int n;
373
374 if (wp->pipe_fd != -1) {
375 if (EVBUFFER_LENGTH(wp->pipe_event->output) != 0)
376 return (0);
377 if (ioctl(wp->fd, FIONREAD, &n) != -1 && n > 0)
378 return (0);
379 }
380
381 if (~wp->flags & PANE_EXITED)
382 return (0);
383 return (1);
384 }
385
386 void
387 window_add_ref(struct window *w, const char *from)
388 {
389 w->references++;
390 log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
391 }
392
393 void
394 window_remove_ref(struct window *w, const char *from)
395 {
396 w->references--;
397 log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
398
399 if (w->references == 0)
400 window_destroy(w);
401 }
402
403 void
404 window_set_name(struct window *w, const char *new_name)
405 {
406 free(w->name);
407 utf8_stravis(&w->name, new_name, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
408 notify_window("window-renamed", w);
409 }
410
411 void
412 window_resize(struct window *w, u_int sx, u_int sy, int xpixel, int ypixel)
413 {
414 if (xpixel == 0)
415 xpixel = DEFAULT_XPIXEL;
416 if (ypixel == 0)
417 ypixel = DEFAULT_YPIXEL;
418
419 log_debug("%s: @%u resize %ux%u (%ux%u)", __func__, w->id, sx, sy,
420 xpixel == -1 ? w->xpixel : (u_int)xpixel,
421 ypixel == -1 ? w->ypixel : (u_int)ypixel);
422 w->sx = sx;
423 w->sy = sy;
424 if (xpixel != -1)
425 w->xpixel = xpixel;
426 if (ypixel != -1)
427 w->ypixel = ypixel;
428 }
429
430 void
431 window_pane_send_resize(struct window_pane *wp, u_int sx, u_int sy)
432 {
433 struct window *w = wp->window;
434 struct winsize ws;
435
436 if (wp->fd == -1)
437 return;
438
439 log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, sx, sy);
440
441 memset(&ws, 0, sizeof ws);
442 ws.ws_col = sx;
443 ws.ws_row = sy;
444 ws.ws_xpixel = w->xpixel * ws.ws_col;
445 ws.ws_ypixel = w->ypixel * ws.ws_row;
446 if (ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
447 fatal("ioctl failed");
448 }
449
450 int
451 window_has_pane(struct window *w, struct window_pane *wp)
452 {
453 struct window_pane *wp1;
454
455 TAILQ_FOREACH(wp1, &w->panes, entry) {
456 if (wp1 == wp)
457 return (1);
458 }
459 return (0);
460 }
461
462 void
463 window_update_focus(struct window *w)
464 {
465 if (w != NULL) {
466 log_debug("%s: @%u", __func__, w->id);
467 window_pane_update_focus(w->active);
468 }
469 }
470
471 void
472 window_pane_update_focus(struct window_pane *wp)
473 {
474 struct client *c;
475 int focused = 0;
476
477 if (wp != NULL) {
478 if (wp != wp->window->active)
479 focused = 0;
480 else {
481 TAILQ_FOREACH(c, &clients, entry) {
482 if (c->session != NULL &&
483 c->session->attached != 0 &&
484 (c->flags & CLIENT_FOCUSED) &&
485 c->session->curw->window == wp->window) {
486 focused = 1;
487 break;
488 }
489 }
490 }
491 if (!focused && (wp->flags & PANE_FOCUSED)) {
492 log_debug("%s: %%%u focus out", __func__, wp->id);
493 if (wp->base.mode & MODE_FOCUSON)
494 bufferevent_write(wp->event, "\033[O", 3);
495 notify_pane("pane-focus-out", wp);
496 wp->flags &= ~PANE_FOCUSED;
497 } else if (focused && (~wp->flags & PANE_FOCUSED)) {
498 log_debug("%s: %%%u focus in", __func__, wp->id);
499 if (wp->base.mode & MODE_FOCUSON)
500 bufferevent_write(wp->event, "\033[I", 3);
501 notify_pane("pane-focus-in", wp);
502 wp->flags |= PANE_FOCUSED;
503 } else
504 log_debug("%s: %%%u focus unchanged", __func__, wp->id);
505 }
506 }
507
508 int
509 window_set_active_pane(struct window *w, struct window_pane *wp, int notify)
510 {
511 struct window_pane *lastwp;
512
513 log_debug("%s: pane %%%u", __func__, wp->id);
514
515 if (wp == w->active)
516 return (0);
517 lastwp = w->active;
518
519 window_pane_stack_remove(&w->last_panes, wp);
520 window_pane_stack_push(&w->last_panes, lastwp);
521
522 w->active = wp;
523 w->active->active_point = next_active_point++;
524 w->active->flags |= PANE_CHANGED;
525
526 if (options_get_number(global_options, "focus-events")) {
527 window_pane_update_focus(lastwp);
528 window_pane_update_focus(w->active);
529 }
530
531 tty_update_window_offset(w);
532
533 if (notify)
534 notify_window("window-pane-changed", w);
535 return (1);
536 }
537
538 static int
539 window_pane_get_palette(struct window_pane *wp, int c)
540 {
541 if (wp == NULL)
542 return (-1);
543 return (colour_palette_get(&wp->palette, c));
544 }
545
546 void
547 window_redraw_active_switch(struct window *w, struct window_pane *wp)
548 {
549 struct grid_cell *gc1, *gc2;
550 int c1, c2;
551
552 if (wp == w->active)
553 return;
554
555 for (;;) {
556 /*
557 * If the active and inactive styles or palettes are different,
558 * need to redraw the panes.
559 */
560 gc1 = &wp->cached_gc;
561 gc2 = &wp->cached_active_gc;
562 if (!grid_cells_look_equal(gc1, gc2))
563 wp->flags |= PANE_REDRAW;
564 else {
565 c1 = window_pane_get_palette(wp, gc1->fg);
566 c2 = window_pane_get_palette(wp, gc2->fg);
567 if (c1 != c2)
568 wp->flags |= PANE_REDRAW;
569 else {
570 c1 = window_pane_get_palette(wp, gc1->bg);
571 c2 = window_pane_get_palette(wp, gc2->bg);
572 if (c1 != c2)
573 wp->flags |= PANE_REDRAW;
574 }
575 }
576 if (wp == w->active)
577 break;
578 wp = w->active;
579 }
580 }
581
582 struct window_pane *
583 window_get_active_at(struct window *w, u_int x, u_int y)
584 {
585 struct window_pane *wp;
586
587 TAILQ_FOREACH(wp, &w->panes, entry) {
588 if (!window_pane_visible(wp))
589 continue;
590 if (x < wp->xoff || x > wp->xoff + wp->sx)
591 continue;
592 if (y < wp->yoff || y > wp->yoff + wp->sy)
593 continue;
594 return (wp);
595 }
596 return (NULL);
597 }
598
599 struct window_pane *
600 window_find_string(struct window *w, const char *s)
601 {
602 u_int x, y, top = 0, bottom = w->sy - 1;
603 int status;
604
605 x = w->sx / 2;
606 y = w->sy / 2;
607
608 status = options_get_number(w->options, "pane-border-status");
609 if (status == PANE_STATUS_TOP)
610 top++;
611 else if (status == PANE_STATUS_BOTTOM)
612 bottom--;
613
614 if (strcasecmp(s, "top") == 0)
615 y = top;
616 else if (strcasecmp(s, "bottom") == 0)
617 y = bottom;
618 else if (strcasecmp(s, "left") == 0)
619 x = 0;
620 else if (strcasecmp(s, "right") == 0)
621 x = w->sx - 1;
622 else if (strcasecmp(s, "top-left") == 0) {
623 x = 0;
624 y = top;
625 } else if (strcasecmp(s, "top-right") == 0) {
626 x = w->sx - 1;
627 y = top;
628 } else if (strcasecmp(s, "bottom-left") == 0) {
629 x = 0;
630 y = bottom;
631 } else if (strcasecmp(s, "bottom-right") == 0) {
632 x = w->sx - 1;
633 y = bottom;
634 } else
635 return (NULL);
636
637 return (window_get_active_at(w, x, y));
638 }
639
640 int
641 window_zoom(struct window_pane *wp)
642 {
643 struct window *w = wp->window;
644 struct window_pane *wp1;
645
646 if (w->flags & WINDOW_ZOOMED)
647 return (-1);
648
649 if (window_count_panes(w) == 1)
650 return (-1);
651
652 if (w->active != wp)
653 window_set_active_pane(w, wp, 1);
654
655 TAILQ_FOREACH(wp1, &w->panes, entry) {
656 wp1->saved_layout_cell = wp1->layout_cell;
657 wp1->layout_cell = NULL;
658 }
659
660 w->saved_layout_root = w->layout_root;
661 layout_init(w, wp);
662 w->flags |= WINDOW_ZOOMED;
663 notify_window("window-layout-changed", w);
664
665 return (0);
666 }
667
668 int
669 window_unzoom(struct window *w, int notify)
670 {
671 struct window_pane *wp;
672
673 if (!(w->flags & WINDOW_ZOOMED))
674 return (-1);
675
676 w->flags &= ~WINDOW_ZOOMED;
677 layout_free(w);
678 w->layout_root = w->saved_layout_root;
679 w->saved_layout_root = NULL;
680
681 TAILQ_FOREACH(wp, &w->panes, entry) {
682 wp->layout_cell = wp->saved_layout_cell;
683 wp->saved_layout_cell = NULL;
684 }
685 layout_fix_panes(w, NULL);
686
687 if (notify)
688 notify_window("window-layout-changed", w);
689
690 return (0);
691 }
692
693 int
694 window_push_zoom(struct window *w, int always, int flag)
695 {
696 log_debug("%s: @%u %d", __func__, w->id,
697 flag && (w->flags & WINDOW_ZOOMED));
698 if (flag && (always || (w->flags & WINDOW_ZOOMED)))
699 w->flags |= WINDOW_WASZOOMED;
700 else
701 w->flags &= ~WINDOW_WASZOOMED;
702 return (window_unzoom(w, 1) == 0);
703 }
704
705 int
706 window_pop_zoom(struct window *w)
707 {
708 log_debug("%s: @%u %d", __func__, w->id,
709 !!(w->flags & WINDOW_WASZOOMED));
710 if (w->flags & WINDOW_WASZOOMED)
711 return (window_zoom(w->active) == 0);
712 return (0);
713 }
714
715 struct window_pane *
716 window_add_pane(struct window *w, struct window_pane *other, u_int hlimit,
717 int flags)
718 {
719 struct window_pane *wp;
720
721 if (other == NULL)
722 other = w->active;
723
724 wp = window_pane_create(w, w->sx, w->sy, hlimit);
725 if (TAILQ_EMPTY(&w->panes)) {
726 log_debug("%s: @%u at start", __func__, w->id);
727 TAILQ_INSERT_HEAD(&w->panes, wp, entry);
728 } else if (flags & SPAWN_BEFORE) {
729 log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
730 if (flags & SPAWN_FULLSIZE)
731 TAILQ_INSERT_HEAD(&w->panes, wp, entry);
732 else
733 TAILQ_INSERT_BEFORE(other, wp, entry);
734 } else {
735 log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
736 if (flags & SPAWN_FULLSIZE)
737 TAILQ_INSERT_TAIL(&w->panes, wp, entry);
738 else
739 TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
740 }
741 return (wp);
742 }
743
744 void
745 window_lost_pane(struct window *w, struct window_pane *wp)
746 {
747 log_debug("%s: @%u pane %%%u", __func__, w->id, wp->id);
748
749 if (wp == marked_pane.wp)
750 server_clear_marked();
751
752 window_pane_stack_remove(&w->last_panes, wp);
753 if (wp == w->active) {
754 w->active = TAILQ_FIRST(&w->last_panes);
755 if (w->active == NULL) {
756 w->active = TAILQ_PREV(wp, window_panes, entry);
757 if (w->active == NULL)
758 w->active = TAILQ_NEXT(wp, entry);
759 }
760 if (w->active != NULL) {
761 window_pane_stack_remove(&w->last_panes, w->active);
762 w->active->flags |= PANE_CHANGED;
763 notify_window("window-pane-changed", w);
764 window_update_focus(w);
765 }
766 }
767 }
768
769 void
770 window_remove_pane(struct window *w, struct window_pane *wp)
771 {
772 window_lost_pane(w, wp);
773
774 TAILQ_REMOVE(&w->panes, wp, entry);
775 window_pane_destroy(wp);
776 }
777
778 struct window_pane *
779 window_pane_at_index(struct window *w, u_int idx)
780 {
781 struct window_pane *wp;
782 u_int n;
783
784 n = options_get_number(w->options, "pane-base-index");
785 TAILQ_FOREACH(wp, &w->panes, entry) {
786 if (n == idx)
787 return (wp);
788 n++;
789 }
790 return (NULL);
791 }
792
793 struct window_pane *
794 window_pane_next_by_number(struct window *w, struct window_pane *wp, u_int n)
795 {
796 for (; n > 0; n--) {
797 if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
798 wp = TAILQ_FIRST(&w->panes);
799 }
800
801 return (wp);
802 }
803
804 struct window_pane *
805 window_pane_previous_by_number(struct window *w, struct window_pane *wp,
806 u_int n)
807 {
808 for (; n > 0; n--) {
809 if ((wp = TAILQ_PREV(wp, window_panes, entry)) == NULL)
810 wp = TAILQ_LAST(&w->panes, window_panes);
811 }
812
813 return (wp);
814 }
815
816 int
817 window_pane_index(struct window_pane *wp, u_int *i)
818 {
819 struct window_pane *wq;
820 struct window *w = wp->window;
821
822 *i = options_get_number(w->options, "pane-base-index");
823 TAILQ_FOREACH(wq, &w->panes, entry) {
824 if (wp == wq) {
825 return (0);
826 }
827 (*i)++;
828 }
829
830 return (-1);
831 }
832
833 u_int
834 window_count_panes(struct window *w)
835 {
836 struct window_pane *wp;
837 u_int n;
838
839 n = 0;
840 TAILQ_FOREACH(wp, &w->panes, entry)
841 n++;
842 return (n);
843 }
844
845 void
846 window_destroy_panes(struct window *w)
847 {
848 struct window_pane *wp;
849
850 while (!TAILQ_EMPTY(&w->last_panes)) {
851 wp = TAILQ_FIRST(&w->last_panes);
852 window_pane_stack_remove(&w->last_panes, wp);
853 }
854
855 while (!TAILQ_EMPTY(&w->panes)) {
856 wp = TAILQ_FIRST(&w->panes);
857 TAILQ_REMOVE(&w->panes, wp, entry);
858 window_pane_destroy(wp);
859 }
860 }
861
862 const char *
863 window_printable_flags(struct winlink *wl, int escape)
864 {
865 struct session *s = wl->session;
866 static char flags[32];
867 int pos;
868
869 pos = 0;
870 if (wl->flags & WINLINK_ACTIVITY) {
871 flags[pos++] = '#';
872 if (escape)
873 flags[pos++] = '#';
874 }
875 if (wl->flags & WINLINK_BELL)
876 flags[pos++] = '!';
877 if (wl->flags & WINLINK_SILENCE)
878 flags[pos++] = '~';
879 if (wl == s->curw)
880 flags[pos++] = '*';
881 if (wl == TAILQ_FIRST(&s->lastw))
882 flags[pos++] = '-';
883 if (server_check_marked() && wl == marked_pane.wl)
884 flags[pos++] = 'M';
885 if (wl->window->flags & WINDOW_ZOOMED)
886 flags[pos++] = 'Z';
887 flags[pos] = '\0';
888 return (flags);
889 }
890
891 struct window_pane *
892 window_pane_find_by_id_str(const char *s)
893 {
894 const char *errstr;
895 u_int id;
896
897 if (*s != '%')
898 return (NULL);
899
900 id = strtonum(s + 1, 0, UINT_MAX, &errstr);
901 if (errstr != NULL)
902 return (NULL);
903 return (window_pane_find_by_id(id));
904 }
905
906 struct window_pane *
907 window_pane_find_by_id(u_int id)
908 {
909 struct window_pane wp;
910
911 wp.id = id;
912 return (RB_FIND(window_pane_tree, &all_window_panes, &wp));
913 }
914
915 static struct window_pane *
916 window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
917 {
918 struct window_pane *wp;
919 char host[HOST_NAME_MAX + 1];
920
921 wp = xcalloc(1, sizeof *wp);
922 wp->window = w;
923 wp->options = options_create(w->options);
924 wp->flags = PANE_STYLECHANGED;
925
926 wp->id = next_window_pane_id++;
927 RB_INSERT(window_pane_tree, &all_window_panes, wp);
928
929 wp->fd = -1;
930
931 TAILQ_INIT(&wp->modes);
932
933 TAILQ_INIT (&wp->resize_queue);
934
935 wp->sx = sx;
936 wp->sy = sy;
937
938 wp->pipe_fd = -1;
939
940 colour_palette_init(&wp->palette);
941 colour_palette_from_option(&wp->palette, wp->options);
942
943 screen_init(&wp->base, sx, sy, hlimit);
944 wp->screen = &wp->base;
945 window_pane_default_cursor(wp);
946
947 screen_init(&wp->status_screen, 1, 1, 0);
948
949 if (gethostname(host, sizeof host) == 0)
950 screen_set_title(&wp->base, host);
951
952 return (wp);
953 }
954
955 static void
956 window_pane_destroy(struct window_pane *wp)
957 {
958 struct window_pane_resize *r;
959 struct window_pane_resize *r1;
960
961 window_pane_reset_mode_all(wp);
962 free(wp->searchstr);
963
964 if (wp->fd != -1) {
965 bufferevent_free(wp->event);
966 close(wp->fd);
967 }
968 if (wp->ictx != NULL)
969 input_free(wp->ictx);
970
971 screen_free(&wp->status_screen);
972
973 screen_free(&wp->base);
974
975 if (wp->pipe_fd != -1) {
976 bufferevent_free(wp->pipe_event);
977 close(wp->pipe_fd);
978 }
979
980 if (event_initialized(&wp->resize_timer))
981 event_del(&wp->resize_timer);
982 TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1) {
983 TAILQ_REMOVE(&wp->resize_queue, r, entry);
984 free(r);
985 }
986
987 RB_REMOVE(window_pane_tree, &all_window_panes, wp);
988
989 options_free(wp->options);
990 free((void *)wp->cwd);
991 free(wp->shell);
992 cmd_free_argv(wp->argc, wp->argv);
993 colour_palette_free(&wp->palette);
994 free(wp);
995 }
996
997 static void
998 window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
999 {
1000 struct window_pane *wp = data;
1001 struct evbuffer *evb = wp->event->input;
1002 struct window_pane_offset *wpo = &wp->pipe_offset;
1003 size_t size = EVBUFFER_LENGTH(evb);
1004 char *new_data;
1005 size_t new_size;
1006 struct client *c;
1007
1008 if (wp->pipe_fd != -1) {
1009 new_data = window_pane_get_new_data(wp, wpo, &new_size);
1010 if (new_size > 0) {
1011 bufferevent_write(wp->pipe_event, new_data, new_size);
1012 window_pane_update_used_data(wp, wpo, new_size);
1013 }
1014 }
1015
1016 log_debug("%%%u has %zu bytes", wp->id, size);
1017 TAILQ_FOREACH(c, &clients, entry) {
1018 if (c->session != NULL && (c->flags & CLIENT_CONTROL))
1019 control_write_output(c, wp);
1020 }
1021 input_parse_pane(wp);
1022 bufferevent_disable(wp->event, EV_READ);
1023 }
1024
1025 static void
1026 window_pane_error_callback(__unused struct bufferevent *bufev,
1027 __unused short what, void *data)
1028 {
1029 struct window_pane *wp = data;
1030
1031 log_debug("%%%u error", wp->id);
1032 wp->flags |= PANE_EXITED;
1033
1034 if (window_pane_destroy_ready(wp))
1035 server_destroy_pane(wp, 1);
1036 }
1037
1038 void
1039 window_pane_set_event(struct window_pane *wp)
1040 {
1041 setblocking(wp->fd, 0);
1042
1043 wp->event = bufferevent_new(wp->fd, window_pane_read_callback,
1044 NULL, window_pane_error_callback, wp);
1045 if (wp->event == NULL)
1046 fatalx("out of memory");
1047 wp->ictx = input_init(wp, wp->event, &wp->palette);
1048
1049 bufferevent_enable(wp->event, EV_READ|EV_WRITE);
1050 }
1051
1052 void
1053 window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
1054 {
1055 struct window_mode_entry *wme;
1056 struct window_pane_resize *r;
1057
1058 if (sx == wp->sx && sy == wp->sy)
1059 return;
1060
1061 r = xmalloc(sizeof *r);
1062 r->sx = sx;
1063 r->sy = sy;
1064 r->osx = wp->sx;
1065 r->osy = wp->sy;
1066 TAILQ_INSERT_TAIL (&wp->resize_queue, r, entry);
1067
1068 wp->sx = sx;
1069 wp->sy = sy;
1070
1071 log_debug("%s: %%%u resize %ux%u", __func__, wp->id, sx, sy);
1072 screen_resize(&wp->base, sx, sy, wp->base.saved_grid == NULL);
1073
1074 wme = TAILQ_FIRST(&wp->modes);
1075 if (wme != NULL && wme->mode->resize != NULL)
1076 wme->mode->resize(wme, sx, sy);
1077 }
1078
1079 int
1080 window_pane_set_mode(struct window_pane *wp, struct window_pane *swp,
1081 const struct window_mode *mode, struct cmd_find_state *fs,
1082 struct args *args)
1083 {
1084 struct window_mode_entry *wme;
1085
1086 if (!TAILQ_EMPTY(&wp->modes) && TAILQ_FIRST(&wp->modes)->mode == mode)
1087 return (1);
1088
1089 TAILQ_FOREACH(wme, &wp->modes, entry) {
1090 if (wme->mode == mode)
1091 break;
1092 }
1093 if (wme != NULL) {
1094 TAILQ_REMOVE(&wp->modes, wme, entry);
1095 TAILQ_INSERT_HEAD(&wp->modes, wme, entry);
1096 } else {
1097 wme = xcalloc(1, sizeof *wme);
1098 wme->wp = wp;
1099 wme->swp = swp;
1100 wme->mode = mode;
1101 wme->prefix = 1;
1102 TAILQ_INSERT_HEAD(&wp->modes, wme, entry);
1103 wme->screen = wme->mode->init(wme, fs, args);
1104 }
1105
1106 wp->screen = wme->screen;
1107 wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1108
1109 server_redraw_window_borders(wp->window);
1110 server_status_window(wp->window);
1111 notify_pane("pane-mode-changed", wp);
1112
1113 return (0);
1114 }
1115
1116 void
1117 window_pane_reset_mode(struct window_pane *wp)
1118 {
1119 struct window_mode_entry *wme, *next;
1120
1121 if (TAILQ_EMPTY(&wp->modes))
1122 return;
1123
1124 wme = TAILQ_FIRST(&wp->modes);
1125 TAILQ_REMOVE(&wp->modes, wme, entry);
1126 wme->mode->free(wme);
1127 free(wme);
1128
1129 next = TAILQ_FIRST(&wp->modes);
1130 if (next == NULL) {
1131 wp->flags &= ~PANE_UNSEENCHANGES;
1132 log_debug("%s: no next mode", __func__);
1133 wp->screen = &wp->base;
1134 } else {
1135 log_debug("%s: next mode is %s", __func__, next->mode->name);
1136 wp->screen = next->screen;
1137 if (next->mode->resize != NULL)
1138 next->mode->resize(next, wp->sx, wp->sy);
1139 }
1140 wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1141
1142 server_redraw_window_borders(wp->window);
1143 server_status_window(wp->window);
1144 notify_pane("pane-mode-changed", wp);
1145 }
1146
1147 void
1148 window_pane_reset_mode_all(struct window_pane *wp)
1149 {
1150 while (!TAILQ_EMPTY(&wp->modes))
1151 window_pane_reset_mode(wp);
1152 }
1153
1154 static void
1155 window_pane_copy_key(struct window_pane *wp, key_code key)
1156 {
1157 struct window_pane *loop;
1158
1159 TAILQ_FOREACH(loop, &wp->window->panes, entry) {
1160 if (loop != wp &&
1161 TAILQ_EMPTY(&loop->modes) &&
1162 loop->fd != -1 &&
1163 (~loop->flags & PANE_INPUTOFF) &&
1164 window_pane_visible(loop) &&
1165 options_get_number(loop->options, "synchronize-panes"))
1166 input_key_pane(loop, key, NULL);
1167 }
1168 }
1169
1170 int
1171 window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
1172 struct winlink *wl, key_code key, struct mouse_event *m)
1173 {
1174 struct window_mode_entry *wme;
1175
1176 if (KEYC_IS_MOUSE(key) && m == NULL)
1177 return (-1);
1178
1179 wme = TAILQ_FIRST(&wp->modes);
1180 if (wme != NULL) {
1181 if (wme->mode->key != NULL && c != NULL) {
1182 key &= ~KEYC_MASK_FLAGS;
1183 wme->mode->key(wme, c, s, wl, key, m);
1184 }
1185 return (0);
1186 }
1187
1188 if (wp->fd == -1 || wp->flags & PANE_INPUTOFF)
1189 return (0);
1190
1191 if (input_key_pane(wp, key, m) != 0)
1192 return (-1);
1193
1194 if (KEYC_IS_MOUSE(key))
1195 return (0);
1196 if (options_get_number(wp->options, "synchronize-panes"))
1197 window_pane_copy_key(wp, key);
1198 return (0);
1199 }
1200
1201 int
1202 window_pane_visible(struct window_pane *wp)
1203 {
1204 if (~wp->window->flags & WINDOW_ZOOMED)
1205 return (1);
1206 return (wp == wp->window->active);
1207 }
1208
1209 int
1210 window_pane_exited(struct window_pane *wp)
1211 {
1212 return (wp->fd == -1 || (wp->flags & PANE_EXITED));
1213 }
1214
1215 u_int
1216 window_pane_search(struct window_pane *wp, const char *term, int regex,
1217 int ignore)
1218 {
1219 struct screen *s = &wp->base;
1220 regex_t r;
1221 char *new = NULL, *line;
1222 u_int i;
1223 int flags = 0, found;
1224 size_t n;
1225
1226 if (!regex) {
1227 if (ignore)
1228 flags |= FNM_CASEFOLD;
1229 xasprintf(&new, "*%s*", term);
1230 } else {
1231 if (ignore)
1232 flags |= REG_ICASE;
1233 if (regcomp(&r, term, flags|REG_EXTENDED) != 0)
1234 return (0);
1235 }
1236
1237 for (i = 0; i < screen_size_y(s); i++) {
1238 line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
1239 for (n = strlen(line); n > 0; n--) {
1240 if (!isspace((u_char)line[n - 1]))
1241 break;
1242 line[n - 1] = '\0';
1243 }
1244 log_debug("%s: %s", __func__, line);
1245 if (!regex)
1246 found = (fnmatch(new, line, flags) == 0);
1247 else
1248 found = (regexec(&r, line, 0, NULL, 0) == 0);
1249 free(line);
1250 if (found)
1251 break;
1252 }
1253 if (!regex)
1254 free(new);
1255 else
1256 regfree(&r);
1257
1258 if (i == screen_size_y(s))
1259 return (0);
1260 return (i + 1);
1261 }
1262
1263 /* Get MRU pane from a list. */
1264 static struct window_pane *
1265 window_pane_choose_best(struct window_pane **list, u_int size)
1266 {
1267 struct window_pane *next, *best;
1268 u_int i;
1269
1270 if (size == 0)
1271 return (NULL);
1272
1273 best = list[0];
1274 for (i = 1; i < size; i++) {
1275 next = list[i];
1276 if (next->active_point > best->active_point)
1277 best = next;
1278 }
1279 return (best);
1280 }
1281
1282 /*
1283 * Find the pane directly above another. We build a list of those adjacent to
1284 * top edge and then choose the best.
1285 */
1286 struct window_pane *
1287 window_pane_find_up(struct window_pane *wp)
1288 {
1289 struct window *w;
1290 struct window_pane *next, *best, **list;
1291 u_int edge, left, right, end, size;
1292 int status, found;
1293
1294 if (wp == NULL)
1295 return (NULL);
1296 w = wp->window;
1297 status = options_get_number(w->options, "pane-border-status");
1298
1299 list = NULL;
1300 size = 0;
1301
1302 edge = wp->yoff;
1303 if (status == PANE_STATUS_TOP) {
1304 if (edge == 1)
1305 edge = w->sy + 1;
1306 } else if (status == PANE_STATUS_BOTTOM) {
1307 if (edge == 0)
1308 edge = w->sy;
1309 } else {
1310 if (edge == 0)
1311 edge = w->sy + 1;
1312 }
1313
1314 left = wp->xoff;
1315 right = wp->xoff + wp->sx;
1316
1317 TAILQ_FOREACH(next, &w->panes, entry) {
1318 if (next == wp)
1319 continue;
1320 if (next->yoff + next->sy + 1 != edge)
1321 continue;
1322 end = next->xoff + next->sx - 1;
1323
1324 found = 0;
1325 if (next->xoff < left && end > right)
1326 found = 1;
1327 else if (next->xoff >= left && next->xoff <= right)
1328 found = 1;
1329 else if (end >= left && end <= right)
1330 found = 1;
1331 if (!found)
1332 continue;
1333 list = xreallocarray(list, size + 1, sizeof *list);
1334 list[size++] = next;
1335 }
1336
1337 best = window_pane_choose_best(list, size);
1338 free(list);
1339 return (best);
1340 }
1341
1342 /* Find the pane directly below another. */
1343 struct window_pane *
1344 window_pane_find_down(struct window_pane *wp)
1345 {
1346 struct window *w;
1347 struct window_pane *next, *best, **list;
1348 u_int edge, left, right, end, size;
1349 int status, found;
1350
1351 if (wp == NULL)
1352 return (NULL);
1353 w = wp->window;
1354 status = options_get_number(w->options, "pane-border-status");
1355
1356 list = NULL;
1357 size = 0;
1358
1359 edge = wp->yoff + wp->sy + 1;
1360 if (status == PANE_STATUS_TOP) {
1361 if (edge >= w->sy)
1362 edge = 1;
1363 } else if (status == PANE_STATUS_BOTTOM) {
1364 if (edge >= w->sy - 1)
1365 edge = 0;
1366 } else {
1367 if (edge >= w->sy)
1368 edge = 0;
1369 }
1370
1371 left = wp->xoff;
1372 right = wp->xoff + wp->sx;
1373
1374 TAILQ_FOREACH(next, &w->panes, entry) {
1375 if (next == wp)
1376 continue;
1377 if (next->yoff != edge)
1378 continue;
1379 end = next->xoff + next->sx - 1;
1380
1381 found = 0;
1382 if (next->xoff < left && end > right)
1383 found = 1;
1384 else if (next->xoff >= left && next->xoff <= right)
1385 found = 1;
1386 else if (end >= left && end <= right)
1387 found = 1;
1388 if (!found)
1389 continue;
1390 list = xreallocarray(list, size + 1, sizeof *list);
1391 list[size++] = next;
1392 }
1393
1394 best = window_pane_choose_best(list, size);
1395 free(list);
1396 return (best);
1397 }
1398
1399 /* Find the pane directly to the left of another. */
1400 struct window_pane *
1401 window_pane_find_left(struct window_pane *wp)
1402 {
1403 struct window *w;
1404 struct window_pane *next, *best, **list;
1405 u_int edge, top, bottom, end, size;
1406 int found;
1407
1408 if (wp == NULL)
1409 return (NULL);
1410 w = wp->window;
1411
1412 list = NULL;
1413 size = 0;
1414
1415 edge = wp->xoff;
1416 if (edge == 0)
1417 edge = w->sx + 1;
1418
1419 top = wp->yoff;
1420 bottom = wp->yoff + wp->sy;
1421
1422 TAILQ_FOREACH(next, &w->panes, entry) {
1423 if (next == wp)
1424 continue;
1425 if (next->xoff + next->sx + 1 != edge)
1426 continue;
1427 end = next->yoff + next->sy - 1;
1428
1429 found = 0;
1430 if (next->yoff < top && end > bottom)
1431 found = 1;
1432 else if (next->yoff >= top && next->yoff <= bottom)
1433 found = 1;
1434 else if (end >= top && end <= bottom)
1435 found = 1;
1436 if (!found)
1437 continue;
1438 list = xreallocarray(list, size + 1, sizeof *list);
1439 list[size++] = next;
1440 }
1441
1442 best = window_pane_choose_best(list, size);
1443 free(list);
1444 return (best);
1445 }
1446
1447 /* Find the pane directly to the right of another. */
1448 struct window_pane *
1449 window_pane_find_right(struct window_pane *wp)
1450 {
1451 struct window *w;
1452 struct window_pane *next, *best, **list;
1453 u_int edge, top, bottom, end, size;
1454 int found;
1455
1456 if (wp == NULL)
1457 return (NULL);
1458 w = wp->window;
1459
1460 list = NULL;
1461 size = 0;
1462
1463 edge = wp->xoff + wp->sx + 1;
1464 if (edge >= w->sx)
1465 edge = 0;
1466
1467 top = wp->yoff;
1468 bottom = wp->yoff + wp->sy;
1469
1470 TAILQ_FOREACH(next, &w->panes, entry) {
1471 if (next == wp)
1472 continue;
1473 if (next->xoff != edge)
1474 continue;
1475 end = next->yoff + next->sy - 1;
1476
1477 found = 0;
1478 if (next->yoff < top && end > bottom)
1479 found = 1;
1480 else if (next->yoff >= top && next->yoff <= bottom)
1481 found = 1;
1482 else if (end >= top && end <= bottom)
1483 found = 1;
1484 if (!found)
1485 continue;
1486 list = xreallocarray(list, size + 1, sizeof *list);
1487 list[size++] = next;
1488 }
1489
1490 best = window_pane_choose_best(list, size);
1491 free(list);
1492 return (best);
1493 }
1494
1495 void
1496 window_pane_stack_push(struct window_panes *stack, struct window_pane *wp)
1497 {
1498 if (wp != NULL) {
1499 window_pane_stack_remove(stack, wp);
1500 TAILQ_INSERT_HEAD(stack, wp, sentry);
1501 wp->flags |= PANE_VISITED;
1502 }
1503 }
1504
1505 void
1506 window_pane_stack_remove(struct window_panes *stack, struct window_pane *wp)
1507 {
1508 if (wp != NULL && (wp->flags & PANE_VISITED)) {
1509 TAILQ_REMOVE(stack, wp, sentry);
1510 wp->flags &= ~PANE_VISITED;
1511 }
1512 }
1513
1514 /* Clear alert flags for a winlink */
1515 void
1516 winlink_clear_flags(struct winlink *wl)
1517 {
1518 struct winlink *loop;
1519
1520 wl->window->flags &= ~WINDOW_ALERTFLAGS;
1521 TAILQ_FOREACH(loop, &wl->window->winlinks, wentry) {
1522 if ((loop->flags & WINLINK_ALERTFLAGS) != 0) {
1523 loop->flags &= ~WINLINK_ALERTFLAGS;
1524 server_status_session(loop->session);
1525 }
1526 }
1527 }
1528
1529 /* Shuffle window indexes up. */
1530 int
1531 winlink_shuffle_up(struct session *s, struct winlink *wl, int before)
1532 {
1533 int idx, last;
1534
1535 if (wl == NULL)
1536 return (-1);
1537 if (before)
1538 idx = wl->idx;
1539 else
1540 idx = wl->idx + 1;
1541
1542 /* Find the next free index. */
1543 for (last = idx; last < INT_MAX; last++) {
1544 if (winlink_find_by_index(&s->windows, last) == NULL)
1545 break;
1546 }
1547 if (last == INT_MAX)
1548 return (-1);
1549
1550 /* Move everything from last - 1 to idx up a bit. */
1551 for (; last > idx; last--) {
1552 wl = winlink_find_by_index(&s->windows, last - 1);
1553 RB_REMOVE(winlinks, &s->windows, wl);
1554 wl->idx++;
1555 RB_INSERT(winlinks, &s->windows, wl);
1556 }
1557
1558 return (idx);
1559 }
1560
1561 static void
1562 window_pane_input_callback(struct client *c, __unused const char *path,
1563 int error, int closed, struct evbuffer *buffer, void *data)
1564 {
1565 struct window_pane_input_data *cdata = data;
1566 struct window_pane *wp;
1567 u_char *buf = EVBUFFER_DATA(buffer);
1568 size_t len = EVBUFFER_LENGTH(buffer);
1569
1570 wp = window_pane_find_by_id(cdata->wp);
1571 if (cdata->file != NULL && (wp == NULL || c->flags & CLIENT_DEAD)) {
1572 if (wp == NULL) {
1573 c->retval = 1;
1574 c->flags |= CLIENT_EXIT;
1575 }
1576 file_cancel(cdata->file);
1577 } else if (cdata->file == NULL || closed || error != 0) {
1578 cmdq_continue(cdata->item);
1579 server_client_unref(c);
1580 free(cdata);
1581 } else
1582 input_parse_buffer(wp, buf, len);
1583 evbuffer_drain(buffer, len);
1584 }
1585
1586 int
1587 window_pane_start_input(struct window_pane *wp, struct cmdq_item *item,
1588 char **cause)
1589 {
1590 struct client *c = cmdq_get_client(item);
1591 struct window_pane_input_data *cdata;
1592
1593 if (~wp->flags & PANE_EMPTY) {
1594 *cause = xstrdup("pane is not empty");
1595 return (-1);
1596 }
1597 if (c->flags & (CLIENT_DEAD|CLIENT_EXITED))
1598 return (1);
1599 if (c->session != NULL)
1600 return (1);
1601
1602 cdata = xmalloc(sizeof *cdata);
1603 cdata->item = item;
1604 cdata->wp = wp->id;
1605 cdata->file = file_read(c, "-", window_pane_input_callback, cdata);
1606 c->references++;
1607
1608 return (0);
1609 }
1610
1611 void *
1612 window_pane_get_new_data(struct window_pane *wp,
1613 struct window_pane_offset *wpo, size_t *size)
1614 {
1615 size_t used = wpo->used - wp->base_offset;
1616
1617 *size = EVBUFFER_LENGTH(wp->event->input) - used;
1618 return (EVBUFFER_DATA(wp->event->input) + used);
1619 }
1620
1621 void
1622 window_pane_update_used_data(struct window_pane *wp,
1623 struct window_pane_offset *wpo, size_t size)
1624 {
1625 size_t used = wpo->used - wp->base_offset;
1626
1627 if (size > EVBUFFER_LENGTH(wp->event->input) - used)
1628 size = EVBUFFER_LENGTH(wp->event->input) - used;
1629 wpo->used += size;
1630 }
1631
1632 void
1633 window_set_fill_character(struct window *w)
1634 {
1635 const char *value;
1636 struct utf8_data *ud;
1637
1638 free(w->fill_character);
1639 w->fill_character = NULL;
1640
1641 value = options_get_string(w->options, "fill-character");
1642 if (*value != '\0' && utf8_isvalid(value)) {
1643 ud = utf8_fromcstr(value);
1644 if (ud != NULL && ud[0].width == 1)
1645 w->fill_character = ud;
1646 }
1647 }
1648
1649 void
1650 window_pane_default_cursor(struct window_pane *wp)
1651 {
1652 struct screen *s = wp->screen;
1653 int c;
1654
1655 c = options_get_number(wp->options, "cursor-colour");
1656 s->default_ccolour = c;
1657
1658 c = options_get_number(wp->options, "cursor-style");
1659 s->default_mode = 0;
1660 screen_set_cursor_style(c, &s->default_cstyle, &s->default_mode);
1661 }