GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/window.c Lines: 0 724 0.0 %
Date: 2017-11-13 Branches: 0 1045 0.0 %

Line Branch Exec Source
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/* $OpenBSD: window.c,v 1.207 2017/11/09 23:02:13 nicm Exp $ */
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 <errno.h>
23
#include <fcntl.h>
24
#include <fnmatch.h>
25
#include <signal.h>
26
#include <stdint.h>
27
#include <stdlib.h>
28
#include <string.h>
29
#include <termios.h>
30
#include <time.h>
31
#include <unistd.h>
32
#include <util.h>
33
#include <vis.h>
34
35
#include "tmux.h"
36
37
/*
38
 * Each window is attached to a number of panes, each of which is a pty. This
39
 * file contains code to handle them.
40
 *
41
 * A pane has two buffers attached, these are filled and emptied by the main
42
 * server poll loop. Output data is received from pty's in screen format,
43
 * translated and returned as a series of escape sequences and strings via
44
 * input_parse (in input.c). Input data is received as key codes and written
45
 * directly via input_key.
46
 *
47
 * Each pane also has a "virtual" screen (screen.c) which contains the current
48
 * state and is redisplayed when the window is reattached to a client.
49
 *
50
 * Windows are stored directly on a global array and wrapped in any number of
51
 * winlink structs to be linked onto local session RB trees. A reference count
52
 * is maintained and a window removed from the global list and destroyed when
53
 * it reaches zero.
54
 */
55
56
/* Global window list. */
57
struct windows windows;
58
59
/* Global panes tree. */
60
struct window_pane_tree all_window_panes;
61
static u_int	next_window_pane_id;
62
static u_int	next_window_id;
63
static u_int	next_active_point;
64
65
static void	window_destroy(struct window *);
66
67
static struct window_pane *window_pane_create(struct window *, u_int, u_int,
68
		    u_int);
69
static void	window_pane_destroy(struct window_pane *);
70
71
static void	window_pane_read_callback(struct bufferevent *, void *);
72
static void	window_pane_error_callback(struct bufferevent *, short, void *);
73
74
static int	winlink_next_index(struct winlinks *, int);
75
76
static struct window_pane *window_pane_choose_best(struct window_pane **,
77
		    u_int);
78
79
RB_GENERATE(windows, window, entry, window_cmp);
80
RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
81
RB_GENERATE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
82
83
int
84
window_cmp(struct window *w1, struct window *w2)
85
{
86
	return (w1->id - w2->id);
87
}
88
89
int
90
winlink_cmp(struct winlink *wl1, struct winlink *wl2)
91
{
92
	return (wl1->idx - wl2->idx);
93
}
94
95
int
96
window_pane_cmp(struct window_pane *wp1, struct window_pane *wp2)
97
{
98
	return (wp1->id - wp2->id);
99
}
100
101
struct winlink *
102
winlink_find_by_window(struct winlinks *wwl, struct window *w)
103
{
104
	struct winlink	*wl;
105
106
	RB_FOREACH(wl, winlinks, wwl) {
107
		if (wl->window == w)
108
			return (wl);
109
	}
110
111
	return (NULL);
112
}
113
114
struct winlink *
115
winlink_find_by_index(struct winlinks *wwl, int idx)
116
{
117
	struct winlink	wl;
118
119
	if (idx < 0)
120
		fatalx("bad index");
121
122
	wl.idx = idx;
123
	return (RB_FIND(winlinks, wwl, &wl));
124
}
125
126
struct winlink *
127
winlink_find_by_window_id(struct winlinks *wwl, u_int id)
128
{
129
	struct winlink *wl;
130
131
	RB_FOREACH(wl, winlinks, wwl) {
132
		if (wl->window->id == id)
133
			return (wl);
134
	}
135
	return (NULL);
136
}
137
138
static int
139
winlink_next_index(struct winlinks *wwl, int idx)
140
{
141
	int	i;
142
143
	i = idx;
144
	do {
145
		if (winlink_find_by_index(wwl, i) == NULL)
146
			return (i);
147
		if (i == INT_MAX)
148
			i = 0;
149
		else
150
			i++;
151
	} while (i != idx);
152
	return (-1);
153
}
154
155
u_int
156
winlink_count(struct winlinks *wwl)
157
{
158
	struct winlink	*wl;
159
	u_int		 n;
160
161
	n = 0;
162
	RB_FOREACH(wl, winlinks, wwl)
163
		n++;
164
165
	return (n);
166
}
167
168
struct winlink *
169
winlink_add(struct winlinks *wwl, int idx)
170
{
171
	struct winlink	*wl;
172
173
	if (idx < 0) {
174
		if ((idx = winlink_next_index(wwl, -idx - 1)) == -1)
175
			return (NULL);
176
	} else if (winlink_find_by_index(wwl, idx) != NULL)
177
		return (NULL);
178
179
	wl = xcalloc(1, sizeof *wl);
180
	wl->idx = idx;
181
	RB_INSERT(winlinks, wwl, wl);
182
183
	return (wl);
184
}
185
186
void
187
winlink_set_window(struct winlink *wl, struct window *w)
188
{
189
	if (wl->window != NULL) {
190
		TAILQ_REMOVE(&wl->window->winlinks, wl, wentry);
191
		window_remove_ref(wl->window, __func__);
192
	}
193
	TAILQ_INSERT_TAIL(&w->winlinks, wl, wentry);
194
	wl->window = w;
195
	window_add_ref(w, __func__);
196
}
197
198
void
199
winlink_remove(struct winlinks *wwl, struct winlink *wl)
200
{
201
	struct window	*w = wl->window;
202
203
	if (w != NULL) {
204
		TAILQ_REMOVE(&w->winlinks, wl, wentry);
205
		window_remove_ref(w, __func__);
206
	}
207
208
	RB_REMOVE(winlinks, wwl, wl);
209
	free(wl->status_text);
210
	free(wl);
211
}
212
213
struct winlink *
214
winlink_next(struct winlink *wl)
215
{
216
	return (RB_NEXT(winlinks, wwl, wl));
217
}
218
219
struct winlink *
220
winlink_previous(struct winlink *wl)
221
{
222
	return (RB_PREV(winlinks, wwl, wl));
223
}
224
225
struct winlink *
226
winlink_next_by_number(struct winlink *wl, struct session *s, int n)
227
{
228
	for (; n > 0; n--) {
229
		if ((wl = RB_NEXT(winlinks, wwl, wl)) == NULL)
230
			wl = RB_MIN(winlinks, &s->windows);
231
	}
232
233
	return (wl);
234
}
235
236
struct winlink *
237
winlink_previous_by_number(struct winlink *wl, struct session *s, int n)
238
{
239
	for (; n > 0; n--) {
240
		if ((wl = RB_PREV(winlinks, wwl, wl)) == NULL)
241
			wl = RB_MAX(winlinks, &s->windows);
242
	}
243
244
	return (wl);
245
}
246
247
void
248
winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
249
{
250
	if (wl == NULL)
251
		return;
252
253
	winlink_stack_remove(stack, wl);
254
	TAILQ_INSERT_HEAD(stack, wl, sentry);
255
}
256
257
void
258
winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
259
{
260
	struct winlink	*wl2;
261
262
	if (wl == NULL)
263
		return;
264
265
	TAILQ_FOREACH(wl2, stack, sentry) {
266
		if (wl2 == wl) {
267
			TAILQ_REMOVE(stack, wl, sentry);
268
			return;
269
		}
270
	}
271
}
272
273
struct window *
274
window_find_by_id_str(const char *s)
275
{
276
	const char	*errstr;
277
	u_int		 id;
278
279
	if (*s != '@')
280
		return (NULL);
281
282
	id = strtonum(s + 1, 0, UINT_MAX, &errstr);
283
	if (errstr != NULL)
284
		return (NULL);
285
	return (window_find_by_id(id));
286
}
287
288
struct window *
289
window_find_by_id(u_int id)
290
{
291
	struct window	w;
292
293
	w.id = id;
294
	return (RB_FIND(windows, &windows, &w));
295
}
296
297
void
298
window_update_activity(struct window *w)
299
{
300
	gettimeofday(&w->activity_time, NULL);
301
	alerts_queue(w, WINDOW_ACTIVITY);
302
}
303
304
struct window *
305
window_create(u_int sx, u_int sy)
306
{
307
	struct window	*w;
308
309
	w = xcalloc(1, sizeof *w);
310
	w->name = NULL;
311
	w->flags = WINDOW_STYLECHANGED;
312
313
	TAILQ_INIT(&w->panes);
314
	w->active = NULL;
315
316
	w->lastlayout = -1;
317
	w->layout_root = NULL;
318
319
	w->sx = sx;
320
	w->sy = sy;
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_update_activity(w);
331
332
	return (w);
333
}
334
335
struct window *
336
window_create_spawn(const char *name, int argc, char **argv, const char *path,
337
    const char *shell, const char *cwd, struct environ *env,
338
    struct termios *tio, u_int sx, u_int sy, u_int hlimit, char **cause)
339
{
340
	struct window		*w;
341
	struct window_pane	*wp;
342
343
	w = window_create(sx, sy);
344
	wp = window_add_pane(w, NULL, 0, hlimit);
345
	layout_init(w, wp);
346
347
	if (window_pane_spawn(wp, argc, argv, path, shell, cwd,
348
	    env, tio, cause) != 0) {
349
		window_destroy(w);
350
		return (NULL);
351
	}
352
353
	w->active = TAILQ_FIRST(&w->panes);
354
	if (name != NULL) {
355
		w->name = xstrdup(name);
356
		options_set_number(w->options, "automatic-rename", 0);
357
	} else
358
		w->name = default_window_name(w);
359
360
	notify_window("window-pane-changed", w);
361
362
	return (w);
363
}
364
365
static void
366
window_destroy(struct window *w)
367
{
368
	log_debug("window @%u destroyed (%d references)", w->id, w->references);
369
370
	RB_REMOVE(windows, &windows, w);
371
372
	if (w->layout_root != NULL)
373
		layout_free_cell(w->layout_root);
374
	if (w->saved_layout_root != NULL)
375
		layout_free_cell(w->saved_layout_root);
376
	free(w->old_layout);
377
378
	if (event_initialized(&w->name_event))
379
		evtimer_del(&w->name_event);
380
381
	if (event_initialized(&w->alerts_timer))
382
		evtimer_del(&w->alerts_timer);
383
384
	options_free(w->options);
385
386
	window_destroy_panes(w);
387
388
	free(w->name);
389
	free(w);
390
}
391
392
int
393
window_pane_destroy_ready(struct window_pane *wp)
394
{
395
	int	n;
396
397
	if (wp->pipe_fd != -1) {
398
		if (EVBUFFER_LENGTH(wp->pipe_event->output) != 0)
399
			return (0);
400
		if (ioctl(wp->fd, FIONREAD, &n) != -1 && n > 0)
401
			return (0);
402
	}
403
404
	if (~wp->flags & PANE_EXITED)
405
		return (0);
406
	return (1);
407
}
408
409
void
410
window_add_ref(struct window *w, const char *from)
411
{
412
	w->references++;
413
	log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
414
}
415
416
void
417
window_remove_ref(struct window *w, const char *from)
418
{
419
	w->references--;
420
	log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
421
422
	if (w->references == 0)
423
		window_destroy(w);
424
}
425
426
void
427
window_set_name(struct window *w, const char *new_name)
428
{
429
	free(w->name);
430
	utf8_stravis(&w->name, new_name, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
431
	notify_window("window-renamed", w);
432
}
433
434
void
435
window_resize(struct window *w, u_int sx, u_int sy)
436
{
437
	w->sx = sx;
438
	w->sy = sy;
439
}
440
441
int
442
window_has_pane(struct window *w, struct window_pane *wp)
443
{
444
	struct window_pane	*wp1;
445
446
	TAILQ_FOREACH(wp1, &w->panes, entry) {
447
		if (wp1 == wp)
448
			return (1);
449
	}
450
	return (0);
451
}
452
453
int
454
window_set_active_pane(struct window *w, struct window_pane *wp)
455
{
456
	log_debug("%s: pane %%%u (was %%%u)", __func__, wp->id, w->active->id);
457
	if (wp == w->active)
458
		return (0);
459
	w->last = w->active;
460
	w->active = wp;
461
	while (!window_pane_visible(w->active)) {
462
		w->active = TAILQ_PREV(w->active, window_panes, entry);
463
		if (w->active == NULL)
464
			w->active = TAILQ_LAST(&w->panes, window_panes);
465
		if (w->active == wp) {
466
			notify_window("window-pane-changed", w);
467
			return (1);
468
		}
469
	}
470
	w->active->active_point = next_active_point++;
471
	w->active->flags |= PANE_CHANGED;
472
	notify_window("window-pane-changed", w);
473
	return (1);
474
}
475
476
void
477
window_redraw_active_switch(struct window *w, struct window_pane *wp)
478
{
479
	const struct grid_cell	*gc;
480
481
	if (wp == w->active)
482
		return;
483
484
	/*
485
	 * If window-style and window-active-style are the same, we don't need
486
	 * to redraw panes when switching active panes.
487
	 */
488
	gc = options_get_style(w->options, "window-active-style");
489
	if (style_equal(gc, options_get_style(w->options, "window-style")))
490
		return;
491
492
	/*
493
	 * If the now active or inactive pane do not have a custom style or if
494
	 * the palette is different, they need to be redrawn.
495
	 */
496
	if (window_pane_get_palette(w->active, w->active->colgc.fg) != -1 ||
497
	    window_pane_get_palette(w->active, w->active->colgc.bg) != -1 ||
498
	    style_equal(&grid_default_cell, &w->active->colgc))
499
		w->active->flags |= PANE_REDRAW;
500
	if (window_pane_get_palette(wp, wp->colgc.fg) != -1 ||
501
	    window_pane_get_palette(wp, wp->colgc.bg) != -1 ||
502
	    style_equal(&grid_default_cell, &wp->colgc))
503
		wp->flags |= PANE_REDRAW;
504
}
505
506
struct window_pane *
507
window_get_active_at(struct window *w, u_int x, u_int y)
508
{
509
	struct window_pane	*wp;
510
511
	TAILQ_FOREACH(wp, &w->panes, entry) {
512
		if (!window_pane_visible(wp))
513
			continue;
514
		if (x < wp->xoff || x > wp->xoff + wp->sx)
515
			continue;
516
		if (y < wp->yoff || y > wp->yoff + wp->sy)
517
			continue;
518
		return (wp);
519
	}
520
	return (NULL);
521
}
522
523
struct window_pane *
524
window_find_string(struct window *w, const char *s)
525
{
526
	u_int	x, y;
527
528
	x = w->sx / 2;
529
	y = w->sy / 2;
530
531
	if (strcasecmp(s, "top") == 0)
532
		y = 0;
533
	else if (strcasecmp(s, "bottom") == 0)
534
		y = w->sy - 1;
535
	else if (strcasecmp(s, "left") == 0)
536
		x = 0;
537
	else if (strcasecmp(s, "right") == 0)
538
		x = w->sx - 1;
539
	else if (strcasecmp(s, "top-left") == 0) {
540
		x = 0;
541
		y = 0;
542
	} else if (strcasecmp(s, "top-right") == 0) {
543
		x = w->sx - 1;
544
		y = 0;
545
	} else if (strcasecmp(s, "bottom-left") == 0) {
546
		x = 0;
547
		y = w->sy - 1;
548
	} else if (strcasecmp(s, "bottom-right") == 0) {
549
		x = w->sx - 1;
550
		y = w->sy - 1;
551
	} else
552
		return (NULL);
553
554
	return (window_get_active_at(w, x, y));
555
}
556
557
int
558
window_zoom(struct window_pane *wp)
559
{
560
	struct window		*w = wp->window;
561
	struct window_pane	*wp1;
562
563
	if (w->flags & WINDOW_ZOOMED)
564
		return (-1);
565
566
	if (!window_pane_visible(wp))
567
		return (-1);
568
569
	if (window_count_panes(w) == 1)
570
		return (-1);
571
572
	if (w->active != wp)
573
		window_set_active_pane(w, wp);
574
575
	TAILQ_FOREACH(wp1, &w->panes, entry) {
576
		wp1->saved_layout_cell = wp1->layout_cell;
577
		wp1->layout_cell = NULL;
578
	}
579
580
	w->saved_layout_root = w->layout_root;
581
	layout_init(w, wp);
582
	w->flags |= WINDOW_ZOOMED;
583
	notify_window("window-layout-changed", w);
584
585
	return (0);
586
}
587
588
int
589
window_unzoom(struct window *w)
590
{
591
	struct window_pane	*wp;
592
593
	if (!(w->flags & WINDOW_ZOOMED))
594
		return (-1);
595
596
	w->flags &= ~WINDOW_ZOOMED;
597
	layout_free(w);
598
	w->layout_root = w->saved_layout_root;
599
	w->saved_layout_root = NULL;
600
601
	TAILQ_FOREACH(wp, &w->panes, entry) {
602
		wp->layout_cell = wp->saved_layout_cell;
603
		wp->saved_layout_cell = NULL;
604
	}
605
	layout_fix_panes(w, w->sx, w->sy);
606
	notify_window("window-layout-changed", w);
607
608
	return (0);
609
}
610
611
struct window_pane *
612
window_add_pane(struct window *w, struct window_pane *other, int before,
613
    u_int hlimit)
614
{
615
	struct window_pane	*wp;
616
617
	if (other == NULL)
618
		other = w->active;
619
620
	wp = window_pane_create(w, w->sx, w->sy, hlimit);
621
	if (TAILQ_EMPTY(&w->panes)) {
622
		log_debug("%s: @%u at start", __func__, w->id);
623
		TAILQ_INSERT_HEAD(&w->panes, wp, entry);
624
	} else if (before) {
625
		log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
626
		TAILQ_INSERT_BEFORE(other, wp, entry);
627
	} else {
628
		log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
629
		TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
630
	}
631
	return (wp);
632
}
633
634
void
635
window_lost_pane(struct window *w, struct window_pane *wp)
636
{
637
	log_debug("%s: @%u pane %%%u", __func__, w->id, wp->id);
638
639
	if (wp == marked_pane.wp)
640
		server_clear_marked();
641
642
	if (wp == w->active) {
643
		w->active = w->last;
644
		w->last = NULL;
645
		if (w->active == NULL) {
646
			w->active = TAILQ_PREV(wp, window_panes, entry);
647
			if (w->active == NULL)
648
				w->active = TAILQ_NEXT(wp, entry);
649
		}
650
		if (w->active != NULL) {
651
			w->active->flags |= PANE_CHANGED;
652
			notify_window("window-pane-changed", w);
653
		}
654
	} else if (wp == w->last)
655
		w->last = NULL;
656
}
657
658
void
659
window_remove_pane(struct window *w, struct window_pane *wp)
660
{
661
	window_lost_pane(w, wp);
662
663
	TAILQ_REMOVE(&w->panes, wp, entry);
664
	window_pane_destroy(wp);
665
}
666
667
struct window_pane *
668
window_pane_at_index(struct window *w, u_int idx)
669
{
670
	struct window_pane	*wp;
671
	u_int			 n;
672
673
	n = options_get_number(w->options, "pane-base-index");
674
	TAILQ_FOREACH(wp, &w->panes, entry) {
675
		if (n == idx)
676
			return (wp);
677
		n++;
678
	}
679
	return (NULL);
680
}
681
682
struct window_pane *
683
window_pane_next_by_number(struct window *w, struct window_pane *wp, u_int n)
684
{
685
	for (; n > 0; n--) {
686
		if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
687
			wp = TAILQ_FIRST(&w->panes);
688
	}
689
690
	return (wp);
691
}
692
693
struct window_pane *
694
window_pane_previous_by_number(struct window *w, struct window_pane *wp,
695
    u_int n)
696
{
697
	for (; n > 0; n--) {
698
		if ((wp = TAILQ_PREV(wp, window_panes, entry)) == NULL)
699
			wp = TAILQ_LAST(&w->panes, window_panes);
700
	}
701
702
	return (wp);
703
}
704
705
int
706
window_pane_index(struct window_pane *wp, u_int *i)
707
{
708
	struct window_pane	*wq;
709
	struct window		*w = wp->window;
710
711
	*i = options_get_number(w->options, "pane-base-index");
712
	TAILQ_FOREACH(wq, &w->panes, entry) {
713
		if (wp == wq) {
714
			return (0);
715
		}
716
		(*i)++;
717
	}
718
719
	return (-1);
720
}
721
722
u_int
723
window_count_panes(struct window *w)
724
{
725
	struct window_pane	*wp;
726
	u_int			 n;
727
728
	n = 0;
729
	TAILQ_FOREACH(wp, &w->panes, entry)
730
		n++;
731
	return (n);
732
}
733
734
void
735
window_destroy_panes(struct window *w)
736
{
737
	struct window_pane	*wp;
738
739
	while (!TAILQ_EMPTY(&w->panes)) {
740
		wp = TAILQ_FIRST(&w->panes);
741
		TAILQ_REMOVE(&w->panes, wp, entry);
742
		window_pane_destroy(wp);
743
	}
744
}
745
746
const char *
747
window_printable_flags(struct winlink *wl)
748
{
749
	struct session	*s = wl->session;
750
	static char	 flags[32];
751
	int		 pos;
752
753
	pos = 0;
754
	if (wl->flags & WINLINK_ACTIVITY)
755
		flags[pos++] = '#';
756
	if (wl->flags & WINLINK_BELL)
757
		flags[pos++] = '!';
758
	if (wl->flags & WINLINK_SILENCE)
759
		flags[pos++] = '~';
760
	if (wl == s->curw)
761
		flags[pos++] = '*';
762
	if (wl == TAILQ_FIRST(&s->lastw))
763
		flags[pos++] = '-';
764
	if (server_check_marked() && wl == marked_pane.wl)
765
		flags[pos++] = 'M';
766
	if (wl->window->flags & WINDOW_ZOOMED)
767
		flags[pos++] = 'Z';
768
	flags[pos] = '\0';
769
	return (flags);
770
}
771
772
struct window_pane *
773
window_pane_find_by_id_str(const char *s)
774
{
775
	const char	*errstr;
776
	u_int		 id;
777
778
	if (*s != '%')
779
		return (NULL);
780
781
	id = strtonum(s + 1, 0, UINT_MAX, &errstr);
782
	if (errstr != NULL)
783
		return (NULL);
784
	return (window_pane_find_by_id(id));
785
}
786
787
struct window_pane *
788
window_pane_find_by_id(u_int id)
789
{
790
	struct window_pane	wp;
791
792
	wp.id = id;
793
	return (RB_FIND(window_pane_tree, &all_window_panes, &wp));
794
}
795
796
static struct window_pane *
797
window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
798
{
799
	struct window_pane	*wp;
800
	char			 host[HOST_NAME_MAX + 1];
801
802
	wp = xcalloc(1, sizeof *wp);
803
	wp->window = w;
804
805
	wp->id = next_window_pane_id++;
806
	RB_INSERT(window_pane_tree, &all_window_panes, wp);
807
808
	wp->argc = 0;
809
	wp->argv = NULL;
810
	wp->shell = NULL;
811
	wp->cwd = NULL;
812
813
	wp->fd = -1;
814
	wp->event = NULL;
815
816
	wp->mode = NULL;
817
	wp->modeprefix = 1;
818
819
	wp->layout_cell = NULL;
820
821
	wp->xoff = 0;
822
	wp->yoff = 0;
823
824
	wp->sx = wp->osx = sx;
825
	wp->sy = wp->osx = sy;
826
827
	wp->pipe_fd = -1;
828
	wp->pipe_off = 0;
829
	wp->pipe_event = NULL;
830
831
	wp->saved_grid = NULL;
832
833
	memcpy(&wp->colgc, &grid_default_cell, sizeof wp->colgc);
834
835
	screen_init(&wp->base, sx, sy, hlimit);
836
	wp->screen = &wp->base;
837
838
	screen_init(&wp->status_screen, 1, 1, 0);
839
840
	if (gethostname(host, sizeof host) == 0)
841
		screen_set_title(&wp->base, host);
842
843
	input_init(wp);
844
845
	return (wp);
846
}
847
848
static void
849
window_pane_destroy(struct window_pane *wp)
850
{
851
	window_pane_reset_mode(wp);
852
	free(wp->searchstr);
853
854
	if (wp->fd != -1) {
855
		bufferevent_free(wp->event);
856
		close(wp->fd);
857
	}
858
859
	input_free(wp);
860
861
	screen_free(&wp->base);
862
	if (wp->saved_grid != NULL)
863
		grid_destroy(wp->saved_grid);
864
865
	if (wp->pipe_fd != -1) {
866
		bufferevent_free(wp->pipe_event);
867
		close(wp->pipe_fd);
868
	}
869
870
	if (event_initialized(&wp->resize_timer))
871
		event_del(&wp->resize_timer);
872
873
	RB_REMOVE(window_pane_tree, &all_window_panes, wp);
874
875
	free((void *)wp->cwd);
876
	free(wp->shell);
877
	cmd_free_argv(wp->argc, wp->argv);
878
	free(wp->palette);
879
	free(wp);
880
}
881
882
int
883
window_pane_spawn(struct window_pane *wp, int argc, char **argv,
884
    const char *path, const char *shell, const char *cwd, struct environ *env,
885
    struct termios *tio, char **cause)
886
{
887
	struct winsize	 ws;
888
	char		*argv0, *cmd, **argvp;
889
	const char	*ptr, *first, *home;
890
	struct termios	 tio2;
891
	int		 i;
892
	sigset_t	 set, oldset;
893
894
	if (wp->fd != -1) {
895
		bufferevent_free(wp->event);
896
		close(wp->fd);
897
	}
898
	if (argc > 0) {
899
		cmd_free_argv(wp->argc, wp->argv);
900
		wp->argc = argc;
901
		wp->argv = cmd_copy_argv(argc, argv);
902
	}
903
	if (shell != NULL) {
904
		free(wp->shell);
905
		wp->shell = xstrdup(shell);
906
	}
907
	if (cwd != NULL) {
908
		free((void *)wp->cwd);
909
		wp->cwd = xstrdup(cwd);
910
	}
911
	wp->flags &= ~(PANE_STATUSREADY|PANE_STATUSDRAWN);
912
913
	cmd = cmd_stringify_argv(wp->argc, wp->argv);
914
	log_debug("spawn: %s -- %s", wp->shell, cmd);
915
	for (i = 0; i < wp->argc; i++)
916
		log_debug("spawn: argv[%d] = %s", i, wp->argv[i]);
917
	environ_log(env, "spawn: ");
918
919
	memset(&ws, 0, sizeof ws);
920
	ws.ws_col = screen_size_x(&wp->base);
921
	ws.ws_row = screen_size_y(&wp->base);
922
923
	sigfillset(&set);
924
	sigprocmask(SIG_BLOCK, &set, &oldset);
925
	switch (wp->pid = fdforkpty(ptm_fd, &wp->fd, wp->tty, NULL, &ws)) {
926
	case -1:
927
		wp->fd = -1;
928
929
		xasprintf(cause, "%s: %s", cmd, strerror(errno));
930
		free(cmd);
931
932
		sigprocmask(SIG_SETMASK, &oldset, NULL);
933
		return (-1);
934
	case 0:
935
		proc_clear_signals(server_proc, 1);
936
		sigprocmask(SIG_SETMASK, &oldset, NULL);
937
938
		cwd = NULL;
939
		if (chdir(wp->cwd) == 0)
940
			cwd = wp->cwd;
941
		else if ((home = find_home()) != NULL && chdir(home) == 0)
942
			cwd = home;
943
		else
944
			chdir("/");
945
946
		if (tcgetattr(STDIN_FILENO, &tio2) != 0)
947
			fatal("tcgetattr failed");
948
		if (tio != NULL)
949
			memcpy(tio2.c_cc, tio->c_cc, sizeof tio2.c_cc);
950
		tio2.c_cc[VERASE] = '\177';
951
		if (tcsetattr(STDIN_FILENO, TCSANOW, &tio2) != 0)
952
			fatal("tcgetattr failed");
953
954
		log_close();
955
		closefrom(STDERR_FILENO + 1);
956
957
		if (path != NULL)
958
			environ_set(env, "PATH", "%s", path);
959
		if (cwd != NULL)
960
			environ_set(env, "PWD", "%s", cwd);
961
		environ_set(env, "TMUX_PANE", "%%%u", wp->id);
962
		environ_push(env);
963
964
		setenv("SHELL", wp->shell, 1);
965
		ptr = strrchr(wp->shell, '/');
966
967
		/*
968
		 * If given one argument, assume it should be passed to sh -c;
969
		 * with more than one argument, use execvp(). If there is no
970
		 * arguments, create a login shell.
971
		 */
972
		if (wp->argc > 0) {
973
			if (wp->argc != 1) {
974
				/* Copy to ensure argv ends in NULL. */
975
				argvp = cmd_copy_argv(wp->argc, wp->argv);
976
				execvp(argvp[0], argvp);
977
				fatal("execvp failed");
978
			}
979
			first = wp->argv[0];
980
981
			if (ptr != NULL && *(ptr + 1) != '\0')
982
				xasprintf(&argv0, "%s", ptr + 1);
983
			else
984
				xasprintf(&argv0, "%s", wp->shell);
985
			execl(wp->shell, argv0, "-c", first, (char *)NULL);
986
			fatal("execl failed");
987
		}
988
		if (ptr != NULL && *(ptr + 1) != '\0')
989
			xasprintf(&argv0, "-%s", ptr + 1);
990
		else
991
			xasprintf(&argv0, "-%s", wp->shell);
992
		execl(wp->shell, argv0, (char *)NULL);
993
		fatal("execl failed");
994
	}
995
996
	sigprocmask(SIG_SETMASK, &oldset, NULL);
997
	setblocking(wp->fd, 0);
998
999
	wp->event = bufferevent_new(wp->fd, window_pane_read_callback, NULL,
1000
	    window_pane_error_callback, wp);
1001
1002
	bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
1003
	bufferevent_enable(wp->event, EV_READ|EV_WRITE);
1004
1005
	free(cmd);
1006
	return (0);
1007
}
1008
1009
static void
1010
window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
1011
{
1012
	struct window_pane	*wp = data;
1013
	struct evbuffer		*evb = wp->event->input;
1014
	size_t			 size = EVBUFFER_LENGTH(evb);
1015
	char			*new_data;
1016
	size_t			 new_size;
1017
1018
	new_size = size - wp->pipe_off;
1019
	if (wp->pipe_fd != -1 && new_size > 0) {
1020
		new_data = EVBUFFER_DATA(evb) + wp->pipe_off;
1021
		bufferevent_write(wp->pipe_event, new_data, new_size);
1022
	}
1023
1024
	log_debug("%%%u has %zu bytes", wp->id, size);
1025
	input_parse(wp);
1026
1027
	wp->pipe_off = EVBUFFER_LENGTH(evb);
1028
}
1029
1030
static void
1031
window_pane_error_callback(__unused struct bufferevent *bufev,
1032
    __unused short what, void *data)
1033
{
1034
	struct window_pane *wp = data;
1035
1036
	log_debug("%%%u error", wp->id);
1037
	wp->flags |= PANE_EXITED;
1038
1039
	if (window_pane_destroy_ready(wp))
1040
		server_destroy_pane(wp, 1);
1041
}
1042
1043
void
1044
window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
1045
{
1046
	if (sx == wp->sx && sy == wp->sy)
1047
		return;
1048
	wp->sx = sx;
1049
	wp->sy = sy;
1050
1051
	screen_resize(&wp->base, sx, sy, wp->saved_grid == NULL);
1052
	if (wp->mode != NULL)
1053
		wp->mode->resize(wp, sx, sy);
1054
1055
	wp->flags |= PANE_RESIZE;
1056
}
1057
1058
/*
1059
 * Enter alternative screen mode. A copy of the visible screen is saved and the
1060
 * history is not updated
1061
 */
1062
void
1063
window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc,
1064
    int cursor)
1065
{
1066
	struct screen	*s = &wp->base;
1067
	u_int		 sx, sy;
1068
1069
	if (wp->saved_grid != NULL)
1070
		return;
1071
	if (!options_get_number(wp->window->options, "alternate-screen"))
1072
		return;
1073
	sx = screen_size_x(s);
1074
	sy = screen_size_y(s);
1075
1076
	wp->saved_grid = grid_create(sx, sy, 0);
1077
	grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
1078
	if (cursor) {
1079
		wp->saved_cx = s->cx;
1080
		wp->saved_cy = s->cy;
1081
	}
1082
	memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
1083
1084
	grid_view_clear(s->grid, 0, 0, sx, sy, 8);
1085
1086
	wp->base.grid->flags &= ~GRID_HISTORY;
1087
1088
	wp->flags |= PANE_REDRAW;
1089
}
1090
1091
/* Exit alternate screen mode and restore the copied grid. */
1092
void
1093
window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc,
1094
    int cursor)
1095
{
1096
	struct screen	*s = &wp->base;
1097
	u_int		 sx, sy;
1098
1099
	if (wp->saved_grid == NULL)
1100
		return;
1101
	if (!options_get_number(wp->window->options, "alternate-screen"))
1102
		return;
1103
	sx = screen_size_x(s);
1104
	sy = screen_size_y(s);
1105
1106
	/*
1107
	 * If the current size is bigger, temporarily resize to the old size
1108
	 * before copying back.
1109
	 */
1110
	if (sy > wp->saved_grid->sy)
1111
		screen_resize(s, sx, wp->saved_grid->sy, 1);
1112
1113
	/* Restore the grid, cursor position and cell. */
1114
	grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
1115
	if (cursor)
1116
		s->cx = wp->saved_cx;
1117
	if (s->cx > screen_size_x(s) - 1)
1118
		s->cx = screen_size_x(s) - 1;
1119
	if (cursor)
1120
		s->cy = wp->saved_cy;
1121
	if (s->cy > screen_size_y(s) - 1)
1122
		s->cy = screen_size_y(s) - 1;
1123
	memcpy(gc, &wp->saved_cell, sizeof *gc);
1124
1125
	/*
1126
	 * Turn history back on (so resize can use it) and then resize back to
1127
	 * the current size.
1128
	 */
1129
	wp->base.grid->flags |= GRID_HISTORY;
1130
	if (sy > wp->saved_grid->sy || sx != wp->saved_grid->sx)
1131
		screen_resize(s, sx, sy, 1);
1132
1133
	grid_destroy(wp->saved_grid);
1134
	wp->saved_grid = NULL;
1135
1136
	wp->flags |= PANE_REDRAW;
1137
}
1138
1139
void
1140
window_pane_set_palette(struct window_pane *wp, u_int n, int colour)
1141
{
1142
	if (n > 0xff)
1143
		return;
1144
1145
	if (wp->palette == NULL)
1146
		wp->palette = xcalloc(0x100, sizeof *wp->palette);
1147
1148
	wp->palette[n] = colour;
1149
	wp->flags |= PANE_REDRAW;
1150
}
1151
1152
void
1153
window_pane_unset_palette(struct window_pane *wp, u_int n)
1154
{
1155
	if (n > 0xff || wp->palette == NULL)
1156
		return;
1157
1158
	wp->palette[n] = 0;
1159
	wp->flags |= PANE_REDRAW;
1160
}
1161
1162
void
1163
window_pane_reset_palette(struct window_pane *wp)
1164
{
1165
	if (wp->palette == NULL)
1166
		return;
1167
1168
	free(wp->palette);
1169
	wp->palette = NULL;
1170
	wp->flags |= PANE_REDRAW;
1171
}
1172
1173
int
1174
window_pane_get_palette(const struct window_pane *wp, int c)
1175
{
1176
	int	new;
1177
1178
	if (wp == NULL || wp->palette == NULL)
1179
		return (-1);
1180
1181
	new = -1;
1182
	if (c < 8)
1183
		new = wp->palette[c];
1184
	else if (c >= 90 && c <= 97)
1185
		new = wp->palette[8 + c - 90];
1186
	else if (c & COLOUR_FLAG_256)
1187
		new = wp->palette[c & ~COLOUR_FLAG_256];
1188
	if (new == 0)
1189
		return (-1);
1190
	return (new);
1191
}
1192
1193
static void
1194
window_pane_mode_timer(__unused int fd, __unused short events, void *arg)
1195
{
1196
	struct window_pane	*wp = arg;
1197
	struct timeval		 tv = { .tv_sec = 10 };
1198
	int			 n = 0;
1199
1200
	evtimer_del(&wp->modetimer);
1201
	evtimer_add(&wp->modetimer, &tv);
1202
1203
	log_debug("%%%u in mode: last=%ld", wp->id, (long)wp->modelast);
1204
1205
	if (wp->modelast < time(NULL) - WINDOW_MODE_TIMEOUT) {
1206
		if (ioctl(wp->fd, FIONREAD, &n) == -1 || n > 0)
1207
			window_pane_reset_mode(wp);
1208
	}
1209
}
1210
1211
int
1212
window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode,
1213
    struct cmd_find_state *fs, struct args *args)
1214
{
1215
	struct screen	*s;
1216
	struct timeval	 tv = { .tv_sec = 10 };
1217
1218
	if (wp->mode != NULL)
1219
		return (1);
1220
	wp->mode = mode;
1221
1222
	wp->modelast = time(NULL);
1223
	evtimer_set(&wp->modetimer, window_pane_mode_timer, wp);
1224
	evtimer_add(&wp->modetimer, &tv);
1225
1226
	if ((s = wp->mode->init(wp, fs, args)) != NULL)
1227
		wp->screen = s;
1228
	wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1229
1230
	server_status_window(wp->window);
1231
	notify_pane("pane-mode-changed", wp);
1232
	return (0);
1233
}
1234
1235
void
1236
window_pane_reset_mode(struct window_pane *wp)
1237
{
1238
	if (wp->mode == NULL)
1239
		return;
1240
1241
	evtimer_del(&wp->modetimer);
1242
1243
	wp->mode->free(wp);
1244
	wp->mode = NULL;
1245
	wp->modeprefix = 1;
1246
1247
	wp->screen = &wp->base;
1248
	wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1249
1250
	server_status_window(wp->window);
1251
	notify_pane("pane-mode-changed", wp);
1252
}
1253
1254
void
1255
window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
1256
    key_code key, struct mouse_event *m)
1257
{
1258
	struct window_pane	*wp2;
1259
1260
	if (KEYC_IS_MOUSE(key) && m == NULL)
1261
		return;
1262
1263
	if (wp->mode != NULL) {
1264
		wp->modelast = time(NULL);
1265
		if (wp->mode->key != NULL)
1266
			wp->mode->key(wp, c, s, (key & ~KEYC_XTERM), m);
1267
		return;
1268
	}
1269
1270
	if (wp->fd == -1 || wp->flags & PANE_INPUTOFF)
1271
		return;
1272
1273
	input_key(wp, key, m);
1274
1275
	if (KEYC_IS_MOUSE(key))
1276
		return;
1277
	if (options_get_number(wp->window->options, "synchronize-panes")) {
1278
		TAILQ_FOREACH(wp2, &wp->window->panes, entry) {
1279
			if (wp2 == wp || wp2->mode != NULL)
1280
				continue;
1281
			if (wp2->fd == -1 || wp2->flags & PANE_INPUTOFF)
1282
				continue;
1283
			if (window_pane_visible(wp2))
1284
				input_key(wp2, key, NULL);
1285
		}
1286
	}
1287
}
1288
1289
int
1290
window_pane_visible(struct window_pane *wp)
1291
{
1292
	struct window	*w = wp->window;
1293
1294
	if (wp->layout_cell == NULL)
1295
		return (0);
1296
1297
	if (wp->xoff >= w->sx || wp->yoff >= w->sy)
1298
		return (0);
1299
	if (wp->xoff + wp->sx > w->sx || wp->yoff + wp->sy > w->sy)
1300
		return (0);
1301
	return (1);
1302
}
1303
1304
u_int
1305
window_pane_search(struct window_pane *wp, const char *searchstr)
1306
{
1307
	struct screen	*s = &wp->base;
1308
	char		*newsearchstr, *line;
1309
	u_int		 i;
1310
1311
	xasprintf(&newsearchstr, "*%s*", searchstr);
1312
1313
	for (i = 0; i < screen_size_y(s); i++) {
1314
		line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
1315
		if (fnmatch(newsearchstr, line, 0) == 0) {
1316
			free(line);
1317
			break;
1318
		}
1319
		free(line);
1320
	}
1321
1322
	free(newsearchstr);
1323
	if (i == screen_size_y(s))
1324
		return (0);
1325
	return (i + 1);
1326
}
1327
1328
/* Get MRU pane from a list. */
1329
static struct window_pane *
1330
window_pane_choose_best(struct window_pane **list, u_int size)
1331
{
1332
	struct window_pane	*next, *best;
1333
	u_int			 i;
1334
1335
	if (size == 0)
1336
		return (NULL);
1337
1338
	best = list[0];
1339
	for (i = 1; i < size; i++) {
1340
		next = list[i];
1341
		if (next->active_point > best->active_point)
1342
			best = next;
1343
	}
1344
	return (best);
1345
}
1346
1347
/*
1348
 * Find the pane directly above another. We build a list of those adjacent to
1349
 * top edge and then choose the best.
1350
 */
1351
struct window_pane *
1352
window_pane_find_up(struct window_pane *wp)
1353
{
1354
	struct window_pane	*next, *best, **list;
1355
	u_int			 edge, left, right, end, size;
1356
	int			 status, found;
1357
1358
	if (wp == NULL || !window_pane_visible(wp))
1359
		return (NULL);
1360
	status = options_get_number(wp->window->options, "pane-border-status");
1361
1362
	list = NULL;
1363
	size = 0;
1364
1365
	edge = wp->yoff;
1366
	if (edge == (status == 1 ? 1 : 0))
1367
		edge = wp->window->sy + 1 - (status == 2 ? 1 : 0);
1368
1369
	left = wp->xoff;
1370
	right = wp->xoff + wp->sx;
1371
1372
	TAILQ_FOREACH(next, &wp->window->panes, entry) {
1373
		if (next == wp || !window_pane_visible(next))
1374
			continue;
1375
		if (next->yoff + next->sy + 1 != edge)
1376
			continue;
1377
		end = next->xoff + next->sx - 1;
1378
1379
		found = 0;
1380
		if (next->xoff < left && end > right)
1381
			found = 1;
1382
		else if (next->xoff >= left && next->xoff <= right)
1383
			found = 1;
1384
		else if (end >= left && end <= right)
1385
			found = 1;
1386
		if (!found)
1387
			continue;
1388
		list = xreallocarray(list, size + 1, sizeof *list);
1389
		list[size++] = next;
1390
	}
1391
1392
	best = window_pane_choose_best(list, size);
1393
	free(list);
1394
	return (best);
1395
}
1396
1397
/* Find the pane directly below another. */
1398
struct window_pane *
1399
window_pane_find_down(struct window_pane *wp)
1400
{
1401
	struct window_pane	*next, *best, **list;
1402
	u_int			 edge, left, right, end, size;
1403
	int			 status, found;
1404
1405
	if (wp == NULL || !window_pane_visible(wp))
1406
		return (NULL);
1407
	status = options_get_number(wp->window->options, "pane-border-status");
1408
1409
	list = NULL;
1410
	size = 0;
1411
1412
	edge = wp->yoff + wp->sy + 1;
1413
	if (edge >= wp->window->sy - (status == 2 ? 1 : 0))
1414
		edge = (status == 1 ? 1 : 0);
1415
1416
	left = wp->xoff;
1417
	right = wp->xoff + wp->sx;
1418
1419
	TAILQ_FOREACH(next, &wp->window->panes, entry) {
1420
		if (next == wp || !window_pane_visible(next))
1421
			continue;
1422
		if (next->yoff != edge)
1423
			continue;
1424
		end = next->xoff + next->sx - 1;
1425
1426
		found = 0;
1427
		if (next->xoff < left && end > right)
1428
			found = 1;
1429
		else if (next->xoff >= left && next->xoff <= right)
1430
			found = 1;
1431
		else if (end >= left && end <= right)
1432
			found = 1;
1433
		if (!found)
1434
			continue;
1435
		list = xreallocarray(list, size + 1, sizeof *list);
1436
		list[size++] = next;
1437
	}
1438
1439
	best = window_pane_choose_best(list, size);
1440
	free(list);
1441
	return (best);
1442
}
1443
1444
/* Find the pane directly to the left of another. */
1445
struct window_pane *
1446
window_pane_find_left(struct window_pane *wp)
1447
{
1448
	struct window_pane	*next, *best, **list;
1449
	u_int			 edge, top, bottom, end, size;
1450
	int			 found;
1451
1452
	if (wp == NULL || !window_pane_visible(wp))
1453
		return (NULL);
1454
1455
	list = NULL;
1456
	size = 0;
1457
1458
	edge = wp->xoff;
1459
	if (edge == 0)
1460
		edge = wp->window->sx + 1;
1461
1462
	top = wp->yoff;
1463
	bottom = wp->yoff + wp->sy;
1464
1465
	TAILQ_FOREACH(next, &wp->window->panes, entry) {
1466
		if (next == wp || !window_pane_visible(next))
1467
			continue;
1468
		if (next->xoff + next->sx + 1 != edge)
1469
			continue;
1470
		end = next->yoff + next->sy - 1;
1471
1472
		found = 0;
1473
		if (next->yoff < top && end > bottom)
1474
			found = 1;
1475
		else if (next->yoff >= top && next->yoff <= bottom)
1476
			found = 1;
1477
		else if (end >= top && end <= bottom)
1478
			found = 1;
1479
		if (!found)
1480
			continue;
1481
		list = xreallocarray(list, size + 1, sizeof *list);
1482
		list[size++] = next;
1483
	}
1484
1485
	best = window_pane_choose_best(list, size);
1486
	free(list);
1487
	return (best);
1488
}
1489
1490
/* Find the pane directly to the right of another. */
1491
struct window_pane *
1492
window_pane_find_right(struct window_pane *wp)
1493
{
1494
	struct window_pane	*next, *best, **list;
1495
	u_int			 edge, top, bottom, end, size;
1496
	int			 found;
1497
1498
	if (wp == NULL || !window_pane_visible(wp))
1499
		return (NULL);
1500
1501
	list = NULL;
1502
	size = 0;
1503
1504
	edge = wp->xoff + wp->sx + 1;
1505
	if (edge >= wp->window->sx)
1506
		edge = 0;
1507
1508
	top = wp->yoff;
1509
	bottom = wp->yoff + wp->sy;
1510
1511
	TAILQ_FOREACH(next, &wp->window->panes, entry) {
1512
		if (next == wp || !window_pane_visible(next))
1513
			continue;
1514
		if (next->xoff != edge)
1515
			continue;
1516
		end = next->yoff + next->sy - 1;
1517
1518
		found = 0;
1519
		if (next->yoff < top && end > bottom)
1520
			found = 1;
1521
		else if (next->yoff >= top && next->yoff <= bottom)
1522
			found = 1;
1523
		else if (end >= top && end <= bottom)
1524
			found = 1;
1525
		if (!found)
1526
			continue;
1527
		list = xreallocarray(list, size + 1, sizeof *list);
1528
		list[size++] = next;
1529
	}
1530
1531
	best = window_pane_choose_best(list, size);
1532
	free(list);
1533
	return (best);
1534
}
1535
1536
/* Clear alert flags for a winlink */
1537
void
1538
winlink_clear_flags(struct winlink *wl)
1539
{
1540
	struct winlink	*loop;
1541
1542
	wl->window->flags &= ~WINDOW_ALERTFLAGS;
1543
	TAILQ_FOREACH(loop, &wl->window->winlinks, wentry) {
1544
		if ((loop->flags & WINLINK_ALERTFLAGS) != 0) {
1545
			loop->flags &= ~WINLINK_ALERTFLAGS;
1546
			server_status_session(loop->session);
1547
		}
1548
	}
1549
}
1550
1551
/* Shuffle window indexes up. */
1552
int
1553
winlink_shuffle_up(struct session *s, struct winlink *wl)
1554
{
1555
	int	 idx, last;
1556
1557
	idx = wl->idx + 1;
1558
1559
	/* Find the next free index. */
1560
	for (last = idx; last < INT_MAX; last++) {
1561
		if (winlink_find_by_index(&s->windows, last) == NULL)
1562
			break;
1563
	}
1564
	if (last == INT_MAX)
1565
		return (-1);
1566
1567
	/* Move everything from last - 1 to idx up a bit. */
1568
	for (; last > idx; last--) {
1569
		wl = winlink_find_by_index(&s->windows, last - 1);
1570
		server_link_window(s, wl, s, last, 0, 0, NULL);
1571
		server_unlink_window(s, wl);
1572
	}
1573
1574
	return (idx);
1575
}