status.c revision 1.150 
1/* $OpenBSD: status.c,v 1.150 2016/09/12 15:40:58 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/time.h>
21
22#include <errno.h>
23#include <limits.h>
24#include <stdarg.h>
25#include <stdlib.h>
26#include <string.h>
27#include <time.h>
28#include <unistd.h>
29
30#include "tmux.h"
31
32char   *status_redraw_get_left(struct client *, time_t, struct grid_cell *,
33	    size_t *);
34char   *status_redraw_get_right(struct client *, time_t, struct grid_cell *,
35	    size_t *);
36char   *status_print(struct client *, struct winlink *, time_t,
37	    struct grid_cell *);
38char   *status_replace(struct client *, struct winlink *, const char *, time_t);
39void	status_message_callback(int, short, void *);
40void	status_timer_callback(int, short, void *);
41
42const char *status_prompt_up_history(u_int *);
43const char *status_prompt_down_history(u_int *);
44void	status_prompt_add_history(const char *);
45
46const char **status_prompt_complete_list(u_int *, const char *);
47char   *status_prompt_complete_prefix(const char **, u_int);
48char   *status_prompt_complete(struct session *, const char *);
49
50char   *status_prompt_find_history_file(void);
51
52/* Status prompt history. */
53#define PROMPT_HISTORY 100
54char	**status_prompt_hlist;
55u_int	  status_prompt_hsize;
56
57/* Find the history file to load/save from/to. */
58char *
59status_prompt_find_history_file(void)
60{
61	const char	*home, *history_file;
62	char		*path;
63
64	history_file = options_get_string(global_options, "history-file");
65	if (*history_file == '\0')
66		return (NULL);
67	if (*history_file == '/')
68		return (xstrdup(history_file));
69
70	if (history_file[0] != '~' || history_file[1] != '/')
71		return (NULL);
72	if ((home = find_home()) == NULL)
73		return (NULL);
74	xasprintf(&path, "%s%s", home, history_file + 1);
75	return (path);
76}
77
78/* Load status prompt history from file. */
79void
80status_prompt_load_history(void)
81{
82	FILE	*f;
83	char	*history_file, *line, *tmp;
84	size_t	 length;
85
86	if ((history_file = status_prompt_find_history_file()) == NULL)
87		return;
88	log_debug("loading history from %s", history_file);
89
90	f = fopen(history_file, "r");
91	if (f == NULL) {
92		log_debug("%s: %s", history_file, strerror(errno));
93		free(history_file);
94		return;
95	}
96	free(history_file);
97
98	for (;;) {
99		if ((line = fgetln(f, &length)) == NULL)
100			break;
101
102		if (length > 0) {
103			if (line[length - 1] == '\n') {
104				line[length - 1] = '\0';
105				status_prompt_add_history(line);
106			} else {
107				tmp = xmalloc(length + 1);
108				memcpy(tmp, line, length);
109				tmp[length] = '\0';
110				status_prompt_add_history(tmp);
111				free(tmp);
112			}
113		}
114	}
115	fclose(f);
116}
117
118/* Save status prompt history to file. */
119void
120status_prompt_save_history(void)
121{
122	FILE	*f;
123	u_int	 i;
124	char	*history_file;
125
126	if ((history_file = status_prompt_find_history_file()) == NULL)
127		return;
128	log_debug("saving history to %s", history_file);
129
130	f = fopen(history_file, "w");
131	if (f == NULL) {
132		log_debug("%s: %s", history_file, strerror(errno));
133		free(history_file);
134		return;
135	}
136	free(history_file);
137
138	for (i = 0; i < status_prompt_hsize; i++) {
139		fputs(status_prompt_hlist[i], f);
140		fputc('\n', f);
141	}
142	fclose(f);
143
144}
145
146/* Status timer callback. */
147void
148status_timer_callback(__unused int fd, __unused short events, void *arg)
149{
150	struct client	*c = arg;
151	struct session	*s = c->session;
152	struct timeval	 tv;
153
154	evtimer_del(&c->status_timer);
155
156	if (s == NULL)
157		return;
158
159	if (c->message_string == NULL && c->prompt_string == NULL)
160		c->flags |= CLIENT_STATUS;
161
162	timerclear(&tv);
163	tv.tv_sec = options_get_number(s->options, "status-interval");
164
165	if (tv.tv_sec != 0)
166		evtimer_add(&c->status_timer, &tv);
167	log_debug("client %p, status interval %d", c, (int)tv.tv_sec);
168}
169
170/* Start status timer for client. */
171void
172status_timer_start(struct client *c)
173{
174	struct session	*s = c->session;
175
176	if (event_initialized(&c->status_timer))
177		evtimer_del(&c->status_timer);
178	else
179		evtimer_set(&c->status_timer, status_timer_callback, c);
180
181	if (s != NULL && options_get_number(s->options, "status"))
182		status_timer_callback(-1, 0, c);
183}
184
185/* Start status timer for all clients. */
186void
187status_timer_start_all(void)
188{
189	struct client	*c;
190
191	TAILQ_FOREACH(c, &clients, entry)
192		status_timer_start(c);
193}
194
195/* Get screen line of status line. -1 means off. */
196int
197status_at_line(struct client *c)
198{
199	struct session	*s = c->session;
200
201	if (!options_get_number(s->options, "status"))
202		return (-1);
203
204	if (options_get_number(s->options, "status-position") == 0)
205		return (0);
206	return (c->tty.sy - 1);
207}
208
209/* Retrieve options for left string. */
210char *
211status_redraw_get_left(struct client *c, time_t t, struct grid_cell *gc,
212    size_t *size)
213{
214	struct session	*s = c->session;
215	const char	*template;
216	char		*left;
217	size_t		 leftlen;
218
219	style_apply_update(gc, s->options, "status-left-style");
220
221	template = options_get_string(s->options, "status-left");
222	left = status_replace(c, NULL, template, t);
223
224	*size = options_get_number(s->options, "status-left-length");
225	leftlen = screen_write_cstrlen("%s", left);
226	if (leftlen < *size)
227		*size = leftlen;
228	return (left);
229}
230
231/* Retrieve options for right string. */
232char *
233status_redraw_get_right(struct client *c, time_t t, struct grid_cell *gc,
234    size_t *size)
235{
236	struct session	*s = c->session;
237	const char	*template;
238	char		*right;
239	size_t		 rightlen;
240
241	style_apply_update(gc, s->options, "status-right-style");
242
243	template = options_get_string(s->options, "status-right");
244	right = status_replace(c, NULL, template, t);
245
246	*size = options_get_number(s->options, "status-right-length");
247	rightlen = screen_write_cstrlen("%s", right);
248	if (rightlen < *size)
249		*size = rightlen;
250	return (right);
251}
252
253/* Get window at window list position. */
254struct window *
255status_get_window_at(struct client *c, u_int x)
256{
257	struct session	*s = c->session;
258	struct winlink	*wl;
259	struct options	*oo;
260	const char	*sep;
261	size_t		 seplen;
262
263	x += c->wlmouse;
264	RB_FOREACH(wl, winlinks, &s->windows) {
265		oo = wl->window->options;
266
267		sep = options_get_string(oo, "window-status-separator");
268		seplen = screen_write_cstrlen("%s", sep);
269
270		if (x < wl->status_width)
271			return (wl->window);
272		x -= wl->status_width + seplen;
273	}
274	return (NULL);
275}
276
277/* Draw status for client on the last lines of given context. */
278int
279status_redraw(struct client *c)
280{
281	struct screen_write_ctx	ctx;
282	struct session	       *s = c->session;
283	struct winlink	       *wl;
284	struct screen		old_status, window_list;
285	struct grid_cell	stdgc, lgc, rgc, gc;
286	struct options	       *oo;
287	time_t			t;
288	char		       *left, *right, *sep;
289	u_int			offset, needed;
290	u_int			wlstart, wlwidth, wlavailable, wloffset, wlsize;
291	size_t			llen, rlen, seplen;
292	int			larrow, rarrow;
293
294	/* No status line? */
295	if (c->tty.sy == 0 || !options_get_number(s->options, "status"))
296		return (1);
297	left = right = NULL;
298	larrow = rarrow = 0;
299
300	/* Store current time. */
301	t = time(NULL);
302
303	/* Set up default colour. */
304	style_apply(&stdgc, s->options, "status-style");
305
306	/* Create the target screen. */
307	memcpy(&old_status, &c->status, sizeof old_status);
308	screen_init(&c->status, c->tty.sx, 1, 0);
309	screen_write_start(&ctx, NULL, &c->status);
310	for (offset = 0; offset < c->tty.sx; offset++)
311		screen_write_putc(&ctx, &stdgc, ' ');
312	screen_write_stop(&ctx);
313
314	/* If the height is one line, blank status line. */
315	if (c->tty.sy <= 1)
316		goto out;
317
318	/* Work out left and right strings. */
319	memcpy(&lgc, &stdgc, sizeof lgc);
320	left = status_redraw_get_left(c, t, &lgc, &llen);
321	memcpy(&rgc, &stdgc, sizeof rgc);
322	right = status_redraw_get_right(c, t, &rgc, &rlen);
323
324	/*
325	 * Figure out how much space we have for the window list. If there
326	 * isn't enough space, just show a blank status line.
327	 */
328	needed = 0;
329	if (llen != 0)
330		needed += llen;
331	if (rlen != 0)
332		needed += rlen;
333	if (c->tty.sx == 0 || c->tty.sx <= needed)
334		goto out;
335	wlavailable = c->tty.sx - needed;
336
337	/* Calculate the total size needed for the window list. */
338	wlstart = wloffset = wlwidth = 0;
339	RB_FOREACH(wl, winlinks, &s->windows) {
340		free(wl->status_text);
341		memcpy(&wl->status_cell, &stdgc, sizeof wl->status_cell);
342		wl->status_text = status_print(c, wl, t, &wl->status_cell);
343		wl->status_width = screen_write_cstrlen("%s", wl->status_text);
344
345		if (wl == s->curw)
346			wloffset = wlwidth;
347
348		oo = wl->window->options;
349		sep = options_get_string(oo, "window-status-separator");
350		seplen = screen_write_cstrlen("%s", sep);
351		wlwidth += wl->status_width + seplen;
352	}
353
354	/* Create a new screen for the window list. */
355	screen_init(&window_list, wlwidth, 1, 0);
356
357	/* And draw the window list into it. */
358	screen_write_start(&ctx, NULL, &window_list);
359	RB_FOREACH(wl, winlinks, &s->windows) {
360		screen_write_cnputs(&ctx, -1, &wl->status_cell, "%s",
361		    wl->status_text);
362
363		oo = wl->window->options;
364		sep = options_get_string(oo, "window-status-separator");
365		screen_write_cnputs(&ctx, -1, &stdgc, "%s", sep);
366	}
367	screen_write_stop(&ctx);
368
369	/* If there is enough space for the total width, skip to draw now. */
370	if (wlwidth <= wlavailable)
371		goto draw;
372
373	/* Find size of current window text. */
374	wlsize = s->curw->status_width;
375
376	/*
377	 * If the current window is already on screen, good to draw from the
378	 * start and just leave off the end.
379	 */
380	if (wloffset + wlsize < wlavailable) {
381		if (wlavailable > 0) {
382			rarrow = 1;
383			wlavailable--;
384		}
385		wlwidth = wlavailable;
386	} else {
387		/*
388		 * Work out how many characters we need to omit from the
389		 * start. There are wlavailable characters to fill, and
390		 * wloffset + wlsize must be the last. So, the start character
391		 * is wloffset + wlsize - wlavailable.
392		 */
393		if (wlavailable > 0) {
394			larrow = 1;
395			wlavailable--;
396		}
397
398		wlstart = wloffset + wlsize - wlavailable;
399		if (wlavailable > 0 && wlwidth > wlstart + wlavailable + 1) {
400			rarrow = 1;
401			wlstart++;
402			wlavailable--;
403		}
404		wlwidth = wlavailable;
405	}
406
407	/* Bail if anything is now too small too. */
408	if (wlwidth == 0 || wlavailable == 0) {
409		screen_free(&window_list);
410		goto out;
411	}
412
413	/*
414	 * Now the start position is known, work out the state of the left and
415	 * right arrows.
416	 */
417	offset = 0;
418	RB_FOREACH(wl, winlinks, &s->windows) {
419		if (wl->flags & WINLINK_ALERTFLAGS &&
420		    larrow == 1 && offset < wlstart)
421			larrow = -1;
422
423		offset += wl->status_width;
424
425		if (wl->flags & WINLINK_ALERTFLAGS &&
426		    rarrow == 1 && offset > wlstart + wlwidth)
427			rarrow = -1;
428	}
429
430draw:
431	/* Begin drawing. */
432	screen_write_start(&ctx, NULL, &c->status);
433
434	/* Draw the left string and arrow. */
435	screen_write_cursormove(&ctx, 0, 0);
436	if (llen != 0)
437		screen_write_cnputs(&ctx, llen, &lgc, "%s", left);
438	if (larrow != 0) {
439		memcpy(&gc, &stdgc, sizeof gc);
440		if (larrow == -1)
441			gc.attr ^= GRID_ATTR_REVERSE;
442		screen_write_putc(&ctx, &gc, '<');
443	}
444
445	/* Draw the right string and arrow. */
446	if (rarrow != 0) {
447		screen_write_cursormove(&ctx, c->tty.sx - rlen - 1, 0);
448		memcpy(&gc, &stdgc, sizeof gc);
449		if (rarrow == -1)
450			gc.attr ^= GRID_ATTR_REVERSE;
451		screen_write_putc(&ctx, &gc, '>');
452	} else
453		screen_write_cursormove(&ctx, c->tty.sx - rlen, 0);
454	if (rlen != 0)
455		screen_write_cnputs(&ctx, rlen, &rgc, "%s", right);
456
457	/* Figure out the offset for the window list. */
458	if (llen != 0)
459		wloffset = llen;
460	else
461		wloffset = 0;
462	if (wlwidth < wlavailable) {
463		switch (options_get_number(s->options, "status-justify")) {
464		case 1:	/* centred */
465			wloffset += (wlavailable - wlwidth) / 2;
466			break;
467		case 2:	/* right */
468			wloffset += (wlavailable - wlwidth);
469			break;
470		}
471	}
472	if (larrow != 0)
473		wloffset++;
474
475	/* Copy the window list. */
476	c->wlmouse = -wloffset + wlstart;
477	screen_write_cursormove(&ctx, wloffset, 0);
478	screen_write_copy(&ctx, &window_list, wlstart, 0, wlwidth, 1);
479	screen_free(&window_list);
480
481	screen_write_stop(&ctx);
482
483out:
484	free(left);
485	free(right);
486
487	if (grid_compare(c->status.grid, old_status.grid) == 0) {
488		screen_free(&old_status);
489		return (0);
490	}
491	screen_free(&old_status);
492	return (1);
493}
494
495/* Replace special sequences in fmt. */
496char *
497status_replace(struct client *c, struct winlink *wl, const char *fmt, time_t t)
498{
499	struct format_tree	*ft;
500	char			*expanded;
501
502	if (fmt == NULL)
503		return (xstrdup(""));
504
505	if (c->flags & CLIENT_STATUSFORCE)
506		ft = format_create(NULL, FORMAT_STATUS|FORMAT_FORCE);
507	else
508		ft = format_create(NULL, FORMAT_STATUS);
509	format_defaults(ft, c, NULL, wl, NULL);
510
511	expanded = format_expand_time(ft, fmt, t);
512
513	format_free(ft);
514	return (expanded);
515}
516
517/* Return winlink status line entry and adjust gc as necessary. */
518char *
519status_print(struct client *c, struct winlink *wl, time_t t,
520    struct grid_cell *gc)
521{
522	struct options	*oo = wl->window->options;
523	struct session	*s = c->session;
524	const char	*fmt;
525	char   		*text;
526
527	style_apply_update(gc, oo, "window-status-style");
528	fmt = options_get_string(oo, "window-status-format");
529	if (wl == s->curw) {
530		style_apply_update(gc, oo, "window-status-current-style");
531		fmt = options_get_string(oo, "window-status-current-format");
532	}
533	if (wl == TAILQ_FIRST(&s->lastw))
534		style_apply_update(gc, oo, "window-status-last-style");
535
536	if (wl->flags & WINLINK_BELL)
537		style_apply_update(gc, oo, "window-status-bell-style");
538	else if (wl->flags & (WINLINK_ACTIVITY|WINLINK_SILENCE))
539		style_apply_update(gc, oo, "window-status-activity-style");
540
541	text = status_replace(c, wl, fmt, t);
542	return (text);
543}
544
545/* Set a status line message. */
546void
547status_message_set(struct client *c, const char *fmt, ...)
548{
549	struct timeval		 tv;
550	struct message_entry	*msg, *msg1;
551	va_list			 ap;
552	int			 delay;
553	u_int			 limit;
554
555	limit = options_get_number(global_options, "message-limit");
556
557	status_prompt_clear(c);
558	status_message_clear(c);
559
560	va_start(ap, fmt);
561	xvasprintf(&c->message_string, fmt, ap);
562	va_end(ap);
563
564	msg = xcalloc(1, sizeof *msg);
565	msg->msg_time = time(NULL);
566	msg->msg_num = c->message_next++;
567	msg->msg = xstrdup(c->message_string);
568	TAILQ_INSERT_TAIL(&c->message_log, msg, entry);
569
570	TAILQ_FOREACH_SAFE(msg, &c->message_log, entry, msg1) {
571		if (msg->msg_num + limit >= c->message_next)
572			break;
573		free(msg->msg);
574		TAILQ_REMOVE(&c->message_log, msg, entry);
575		free(msg);
576	}
577
578	delay = options_get_number(c->session->options, "display-time");
579	if (delay > 0) {
580		tv.tv_sec = delay / 1000;
581		tv.tv_usec = (delay % 1000) * 1000L;
582
583		if (event_initialized(&c->message_timer))
584			evtimer_del(&c->message_timer);
585		evtimer_set(&c->message_timer, status_message_callback, c);
586		evtimer_add(&c->message_timer, &tv);
587	}
588
589	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
590	c->flags |= CLIENT_STATUS;
591}
592
593/* Clear status line message. */
594void
595status_message_clear(struct client *c)
596{
597	if (c->message_string == NULL)
598		return;
599
600	free(c->message_string);
601	c->message_string = NULL;
602
603	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
604	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
605
606	screen_reinit(&c->status);
607}
608
609/* Clear status line message after timer expires. */
610void
611status_message_callback(__unused int fd, __unused short event, void *data)
612{
613	struct client	*c = data;
614
615	status_message_clear(c);
616}
617
618/* Draw client message on status line of present else on last line. */
619int
620status_message_redraw(struct client *c)
621{
622	struct screen_write_ctx		ctx;
623	struct session		       *s = c->session;
624	struct screen		        old_status;
625	size_t			        len;
626	struct grid_cell		gc;
627
628	if (c->tty.sx == 0 || c->tty.sy == 0)
629		return (0);
630	memcpy(&old_status, &c->status, sizeof old_status);
631	screen_init(&c->status, c->tty.sx, 1, 0);
632
633	len = screen_write_strlen("%s", c->message_string);
634	if (len > c->tty.sx)
635		len = c->tty.sx;
636
637	style_apply(&gc, s->options, "message-style");
638
639	screen_write_start(&ctx, NULL, &c->status);
640
641	screen_write_cursormove(&ctx, 0, 0);
642	screen_write_nputs(&ctx, len, &gc, "%s", c->message_string);
643	for (; len < c->tty.sx; len++)
644		screen_write_putc(&ctx, &gc, ' ');
645
646	screen_write_stop(&ctx);
647
648	if (grid_compare(c->status.grid, old_status.grid) == 0) {
649		screen_free(&old_status);
650		return (0);
651	}
652	screen_free(&old_status);
653	return (1);
654}
655
656/* Enable status line prompt. */
657void
658status_prompt_set(struct client *c, const char *msg, const char *input,
659    int (*callbackfn)(void *, const char *), void (*freefn)(void *),
660    void *data, int flags)
661{
662	struct format_tree	*ft;
663	int			 keys;
664	time_t			 t;
665
666	ft = format_create(NULL, 0);
667	format_defaults(ft, c, NULL, NULL, NULL);
668	t = time(NULL);
669
670	status_message_clear(c);
671	status_prompt_clear(c);
672
673	c->prompt_string = format_expand_time(ft, msg, t);
674
675	c->prompt_buffer = format_expand_time(ft, input, t);
676	c->prompt_index = strlen(c->prompt_buffer);
677
678	c->prompt_callbackfn = callbackfn;
679	c->prompt_freefn = freefn;
680	c->prompt_data = data;
681
682	c->prompt_hindex = 0;
683
684	c->prompt_flags = flags;
685
686	keys = options_get_number(c->session->options, "status-keys");
687	if (keys == MODEKEY_EMACS)
688		mode_key_init(&c->prompt_mdata, &mode_key_tree_emacs_edit);
689	else
690		mode_key_init(&c->prompt_mdata, &mode_key_tree_vi_edit);
691
692	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
693	c->flags |= CLIENT_STATUS;
694
695	format_free(ft);
696}
697
698/* Remove status line prompt. */
699void
700status_prompt_clear(struct client *c)
701{
702	if (c->prompt_string == NULL)
703		return;
704
705	if (c->prompt_freefn != NULL && c->prompt_data != NULL)
706		c->prompt_freefn(c->prompt_data);
707
708	free(c->prompt_string);
709	c->prompt_string = NULL;
710
711	free(c->prompt_buffer);
712	c->prompt_buffer = NULL;
713
714	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
715	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
716
717	screen_reinit(&c->status);
718}
719
720/* Update status line prompt with a new prompt string. */
721void
722status_prompt_update(struct client *c, const char *msg, const char *input)
723{
724	struct format_tree	*ft;
725	time_t			 t;
726
727	ft = format_create(NULL, 0);
728	format_defaults(ft, c, NULL, NULL, NULL);
729	t = time(NULL);
730
731	free(c->prompt_string);
732	c->prompt_string = format_expand_time(ft, msg, t);
733
734	free(c->prompt_buffer);
735	c->prompt_buffer = format_expand_time(ft, input, t);
736	c->prompt_index = strlen(c->prompt_buffer);
737
738	c->prompt_hindex = 0;
739
740	c->flags |= CLIENT_STATUS;
741
742	format_free(ft);
743}
744
745/* Draw client prompt on status line of present else on last line. */
746int
747status_prompt_redraw(struct client *c)
748{
749	struct screen_write_ctx		ctx;
750	struct session		       *s = c->session;
751	struct screen		        old_status;
752	size_t			        i, size, left, len, off;
753	struct grid_cell		gc;
754
755	if (c->tty.sx == 0 || c->tty.sy == 0)
756		return (0);
757	memcpy(&old_status, &c->status, sizeof old_status);
758	screen_init(&c->status, c->tty.sx, 1, 0);
759
760	len = screen_write_strlen("%s", c->prompt_string);
761	if (len > c->tty.sx)
762		len = c->tty.sx;
763	off = 0;
764
765	/* Change colours for command mode. */
766	if (c->prompt_mdata.mode == 1)
767		style_apply(&gc, s->options, "message-command-style");
768	else
769		style_apply(&gc, s->options, "message-style");
770
771	screen_write_start(&ctx, NULL, &c->status);
772
773	screen_write_cursormove(&ctx, 0, 0);
774	screen_write_nputs(&ctx, len, &gc, "%s", c->prompt_string);
775
776	left = c->tty.sx - len;
777	if (left != 0) {
778		size = screen_write_strlen("%s", c->prompt_buffer);
779		if (c->prompt_index >= left) {
780			off = c->prompt_index - left + 1;
781			if (c->prompt_index == size)
782				left--;
783			size = left;
784		}
785		screen_write_nputs(&ctx, left, &gc, "%s", c->prompt_buffer +
786		    off);
787
788		for (i = len + size; i < c->tty.sx; i++)
789			screen_write_putc(&ctx, &gc, ' ');
790	}
791
792	screen_write_stop(&ctx);
793
794	/* Apply fake cursor. */
795	off = len + c->prompt_index - off;
796	grid_view_get_cell(c->status.grid, off, 0, &gc);
797	gc.attr ^= GRID_ATTR_REVERSE;
798	grid_view_set_cell(c->status.grid, off, 0, &gc);
799
800	if (grid_compare(c->status.grid, old_status.grid) == 0) {
801		screen_free(&old_status);
802		return (0);
803	}
804	screen_free(&old_status);
805	return (1);
806}
807
808/* Handle keys in prompt. */
809void
810status_prompt_key(struct client *c, key_code key)
811{
812	struct session		*sess = c->session;
813	struct options		*oo = sess->options;
814	struct paste_buffer	*pb;
815	char			*s, *first, *last, word[64], swapc;
816	const char		*histstr, *bufdata, *wsep = NULL;
817	u_char			 ch;
818	size_t			 size, n, off, idx, bufsize;
819
820	size = strlen(c->prompt_buffer);
821	switch (mode_key_lookup(&c->prompt_mdata, key, NULL, NULL)) {
822	case MODEKEYEDIT_CURSORLEFT:
823		if (c->prompt_index > 0) {
824			c->prompt_index--;
825			c->flags |= CLIENT_STATUS;
826		}
827		break;
828	case MODEKEYEDIT_SWITCHMODE:
829		c->flags |= CLIENT_STATUS;
830		break;
831	case MODEKEYEDIT_SWITCHMODEAPPEND:
832		c->flags |= CLIENT_STATUS;
833		/* FALLTHROUGH */
834	case MODEKEYEDIT_CURSORRIGHT:
835		if (c->prompt_index < size) {
836			c->prompt_index++;
837			c->flags |= CLIENT_STATUS;
838		}
839		break;
840	case MODEKEYEDIT_SWITCHMODEBEGINLINE:
841		c->flags |= CLIENT_STATUS;
842		/* FALLTHROUGH */
843	case MODEKEYEDIT_STARTOFLINE:
844		if (c->prompt_index != 0) {
845			c->prompt_index = 0;
846			c->flags |= CLIENT_STATUS;
847		}
848		break;
849	case MODEKEYEDIT_SWITCHMODEAPPENDLINE:
850		c->flags |= CLIENT_STATUS;
851		/* FALLTHROUGH */
852	case MODEKEYEDIT_ENDOFLINE:
853		if (c->prompt_index != size) {
854			c->prompt_index = size;
855			c->flags |= CLIENT_STATUS;
856		}
857		break;
858	case MODEKEYEDIT_COMPLETE:
859		if (*c->prompt_buffer == '\0')
860			break;
861
862		idx = c->prompt_index;
863		if (idx != 0)
864			idx--;
865
866		/* Find the word we are in. */
867		first = c->prompt_buffer + idx;
868		while (first > c->prompt_buffer && *first != ' ')
869			first--;
870		while (*first == ' ')
871			first++;
872		last = c->prompt_buffer + idx;
873		while (*last != '\0' && *last != ' ')
874			last++;
875		while (*last == ' ')
876			last--;
877		if (*last != '\0')
878			last++;
879		if (last <= first ||
880		    ((size_t) (last - first)) > (sizeof word) - 1)
881			break;
882		memcpy(word, first, last - first);
883		word[last - first] = '\0';
884
885		/* And try to complete it. */
886		if ((s = status_prompt_complete(sess, word)) == NULL)
887			break;
888
889		/* Trim out word. */
890		n = size - (last - c->prompt_buffer) + 1; /* with \0 */
891		memmove(first, last, n);
892		size -= last - first;
893
894		/* Insert the new word. */
895		size += strlen(s);
896		off = first - c->prompt_buffer;
897		c->prompt_buffer = xrealloc(c->prompt_buffer, size + 1);
898		first = c->prompt_buffer + off;
899		memmove(first + strlen(s), first, n);
900		memcpy(first, s, strlen(s));
901
902		c->prompt_index = (first - c->prompt_buffer) + strlen(s);
903		free(s);
904
905		c->flags |= CLIENT_STATUS;
906		break;
907	case MODEKEYEDIT_BACKSPACE:
908		if (c->prompt_index != 0) {
909			if (c->prompt_index == size)
910				c->prompt_buffer[--c->prompt_index] = '\0';
911			else {
912				memmove(c->prompt_buffer + c->prompt_index - 1,
913				    c->prompt_buffer + c->prompt_index,
914				    size + 1 - c->prompt_index);
915				c->prompt_index--;
916			}
917			c->flags |= CLIENT_STATUS;
918		}
919		break;
920	case MODEKEYEDIT_DELETE:
921	case MODEKEYEDIT_SWITCHMODESUBSTITUTE:
922		if (c->prompt_index != size) {
923			memmove(c->prompt_buffer + c->prompt_index,
924			    c->prompt_buffer + c->prompt_index + 1,
925			    size + 1 - c->prompt_index);
926			c->flags |= CLIENT_STATUS;
927		}
928		break;
929	case MODEKEYEDIT_DELETELINE:
930	case MODEKEYEDIT_SWITCHMODESUBSTITUTELINE:
931		*c->prompt_buffer = '\0';
932		c->prompt_index = 0;
933		c->flags |= CLIENT_STATUS;
934		break;
935	case MODEKEYEDIT_DELETETOENDOFLINE:
936	case MODEKEYEDIT_SWITCHMODECHANGELINE:
937		if (c->prompt_index < size) {
938			c->prompt_buffer[c->prompt_index] = '\0';
939			c->flags |= CLIENT_STATUS;
940		}
941		break;
942	case MODEKEYEDIT_DELETEWORD:
943		wsep = options_get_string(oo, "word-separators");
944		idx = c->prompt_index;
945
946		/* Find a non-separator. */
947		while (idx != 0) {
948			idx--;
949			if (!strchr(wsep, c->prompt_buffer[idx]))
950				break;
951		}
952
953		/* Find the separator at the beginning of the word. */
954		while (idx != 0) {
955			idx--;
956			if (strchr(wsep, c->prompt_buffer[idx])) {
957				/* Go back to the word. */
958				idx++;
959				break;
960			}
961		}
962
963		memmove(c->prompt_buffer + idx,
964		    c->prompt_buffer + c->prompt_index,
965		    size + 1 - c->prompt_index);
966		memset(c->prompt_buffer + size - (c->prompt_index - idx),
967		    '\0', c->prompt_index - idx);
968		c->prompt_index = idx;
969		c->flags |= CLIENT_STATUS;
970		break;
971	case MODEKEYEDIT_NEXTSPACE:
972		wsep = " ";
973		/* FALLTHROUGH */
974	case MODEKEYEDIT_NEXTWORD:
975		if (wsep == NULL)
976			wsep = options_get_string(oo, "word-separators");
977
978		/* Find a separator. */
979		while (c->prompt_index != size) {
980			c->prompt_index++;
981			if (strchr(wsep, c->prompt_buffer[c->prompt_index]))
982				break;
983		}
984
985		/* Find the word right after the separation. */
986		while (c->prompt_index != size) {
987			c->prompt_index++;
988			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
989				break;
990		}
991
992		c->flags |= CLIENT_STATUS;
993		break;
994	case MODEKEYEDIT_NEXTSPACEEND:
995		wsep = " ";
996		/* FALLTHROUGH */
997	case MODEKEYEDIT_NEXTWORDEND:
998		if (wsep == NULL)
999			wsep = options_get_string(oo, "word-separators");
1000
1001		/* Find a word. */
1002		while (c->prompt_index != size) {
1003			c->prompt_index++;
1004			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
1005				break;
1006		}
1007
1008		/* Find the separator at the end of the word. */
1009		while (c->prompt_index != size) {
1010			c->prompt_index++;
1011			if (strchr(wsep, c->prompt_buffer[c->prompt_index]))
1012				break;
1013		}
1014
1015		/* Back up to the end-of-word like vi. */
1016		if (options_get_number(oo, "status-keys") == MODEKEY_VI &&
1017		    c->prompt_index != 0)
1018			c->prompt_index--;
1019
1020		c->flags |= CLIENT_STATUS;
1021		break;
1022	case MODEKEYEDIT_PREVIOUSSPACE:
1023		wsep = " ";
1024		/* FALLTHROUGH */
1025	case MODEKEYEDIT_PREVIOUSWORD:
1026		if (wsep == NULL)
1027			wsep = options_get_string(oo, "word-separators");
1028
1029		/* Find a non-separator. */
1030		while (c->prompt_index != 0) {
1031			c->prompt_index--;
1032			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
1033				break;
1034		}
1035
1036		/* Find the separator at the beginning of the word. */
1037		while (c->prompt_index != 0) {
1038			c->prompt_index--;
1039			if (strchr(wsep, c->prompt_buffer[c->prompt_index])) {
1040				/* Go back to the word. */
1041				c->prompt_index++;
1042				break;
1043			}
1044		}
1045
1046		c->flags |= CLIENT_STATUS;
1047		break;
1048	case MODEKEYEDIT_HISTORYUP:
1049		histstr = status_prompt_up_history(&c->prompt_hindex);
1050		if (histstr == NULL)
1051			break;
1052		free(c->prompt_buffer);
1053		c->prompt_buffer = xstrdup(histstr);
1054		c->prompt_index = strlen(c->prompt_buffer);
1055		c->flags |= CLIENT_STATUS;
1056		break;
1057	case MODEKEYEDIT_HISTORYDOWN:
1058		histstr = status_prompt_down_history(&c->prompt_hindex);
1059		if (histstr == NULL)
1060			break;
1061		free(c->prompt_buffer);
1062		c->prompt_buffer = xstrdup(histstr);
1063		c->prompt_index = strlen(c->prompt_buffer);
1064		c->flags |= CLIENT_STATUS;
1065		break;
1066	case MODEKEYEDIT_PASTE:
1067		if ((pb = paste_get_top(NULL)) == NULL)
1068			break;
1069		bufdata = paste_buffer_data(pb, &bufsize);
1070		for (n = 0; n < bufsize; n++) {
1071			ch = (u_char)bufdata[n];
1072			if (ch < 32 || ch == 127)
1073				break;
1074		}
1075
1076		c->prompt_buffer = xrealloc(c->prompt_buffer, size + n + 1);
1077		if (c->prompt_index == size) {
1078			memcpy(c->prompt_buffer + c->prompt_index, bufdata, n);
1079			c->prompt_index += n;
1080			c->prompt_buffer[c->prompt_index] = '\0';
1081		} else {
1082			memmove(c->prompt_buffer + c->prompt_index + n,
1083			    c->prompt_buffer + c->prompt_index,
1084			    size + 1 - c->prompt_index);
1085			memcpy(c->prompt_buffer + c->prompt_index, bufdata, n);
1086			c->prompt_index += n;
1087		}
1088
1089		c->flags |= CLIENT_STATUS;
1090		break;
1091	case MODEKEYEDIT_TRANSPOSECHARS:
1092		idx = c->prompt_index;
1093		if (idx < size)
1094			idx++;
1095		if (idx >= 2) {
1096			swapc = c->prompt_buffer[idx - 2];
1097			c->prompt_buffer[idx - 2] = c->prompt_buffer[idx - 1];
1098			c->prompt_buffer[idx - 1] = swapc;
1099			c->prompt_index = idx;
1100			c->flags |= CLIENT_STATUS;
1101		}
1102		break;
1103	case MODEKEYEDIT_ENTER:
1104		if (*c->prompt_buffer != '\0')
1105			status_prompt_add_history(c->prompt_buffer);
1106		if (c->prompt_callbackfn(c->prompt_data, c->prompt_buffer) == 0)
1107			status_prompt_clear(c);
1108		break;
1109	case MODEKEYEDIT_CANCEL:
1110		if (c->prompt_callbackfn(c->prompt_data, NULL) == 0)
1111			status_prompt_clear(c);
1112		break;
1113	case MODEKEY_OTHER:
1114		if (key <= 0x1f || key >= 0x7f)
1115			break;
1116		c->prompt_buffer = xrealloc(c->prompt_buffer, size + 2);
1117
1118		if (c->prompt_index == size) {
1119			c->prompt_buffer[c->prompt_index++] = key;
1120			c->prompt_buffer[c->prompt_index] = '\0';
1121		} else {
1122			memmove(c->prompt_buffer + c->prompt_index + 1,
1123			    c->prompt_buffer + c->prompt_index,
1124			    size + 1 - c->prompt_index);
1125			c->prompt_buffer[c->prompt_index++] = key;
1126		}
1127
1128		if (c->prompt_flags & PROMPT_SINGLE) {
1129			if (c->prompt_callbackfn(c->prompt_data,
1130			    c->prompt_buffer) == 0)
1131				status_prompt_clear(c);
1132		}
1133
1134		c->flags |= CLIENT_STATUS;
1135		break;
1136	default:
1137		break;
1138	}
1139}
1140
1141/* Get previous line from the history. */
1142const char *
1143status_prompt_up_history(u_int *idx)
1144{
1145	/*
1146	 * History runs from 0 to size - 1. Index is from 0 to size. Zero is
1147	 * empty.
1148	 */
1149
1150	if (status_prompt_hsize == 0 || *idx == status_prompt_hsize)
1151		return (NULL);
1152	(*idx)++;
1153	return (status_prompt_hlist[status_prompt_hsize - *idx]);
1154}
1155
1156/* Get next line from the history. */
1157const char *
1158status_prompt_down_history(u_int *idx)
1159{
1160	if (status_prompt_hsize == 0 || *idx == 0)
1161		return ("");
1162	(*idx)--;
1163	if (*idx == 0)
1164		return ("");
1165	return (status_prompt_hlist[status_prompt_hsize - *idx]);
1166}
1167
1168/* Add line to the history. */
1169void
1170status_prompt_add_history(const char *line)
1171{
1172	size_t	size;
1173
1174	if (status_prompt_hsize > 0 &&
1175	    strcmp(status_prompt_hlist[status_prompt_hsize - 1], line) == 0)
1176		return;
1177
1178	if (status_prompt_hsize == PROMPT_HISTORY) {
1179		free(status_prompt_hlist[0]);
1180
1181		size = (PROMPT_HISTORY - 1) * sizeof *status_prompt_hlist;
1182		memmove(&status_prompt_hlist[0], &status_prompt_hlist[1], size);
1183
1184		status_prompt_hlist[status_prompt_hsize - 1] = xstrdup(line);
1185		return;
1186	}
1187
1188	status_prompt_hlist = xreallocarray(status_prompt_hlist,
1189	    status_prompt_hsize + 1, sizeof *status_prompt_hlist);
1190	status_prompt_hlist[status_prompt_hsize++] = xstrdup(line);
1191}
1192
1193/* Build completion list. */
1194const char **
1195status_prompt_complete_list(u_int *size, const char *s)
1196{
1197	const char				**list = NULL, **layout;
1198	const struct cmd_entry			**cmdent;
1199	const struct options_table_entry	 *oe;
1200	const char				 *layouts[] = {
1201		"even-horizontal", "even-vertical", "main-horizontal",
1202		"main-vertical", "tiled", NULL
1203	};
1204
1205	*size = 0;
1206	for (cmdent = cmd_table; *cmdent != NULL; cmdent++) {
1207		if (strncmp((*cmdent)->name, s, strlen(s)) == 0) {
1208			list = xreallocarray(list, (*size) + 1, sizeof *list);
1209			list[(*size)++] = (*cmdent)->name;
1210		}
1211	}
1212	for (oe = options_table; oe->name != NULL; oe++) {
1213		if (strncmp(oe->name, s, strlen(s)) == 0) {
1214			list = xreallocarray(list, (*size) + 1, sizeof *list);
1215			list[(*size)++] = oe->name;
1216		}
1217	}
1218	for (layout = layouts; *layout != NULL; layout++) {
1219		if (strncmp(*layout, s, strlen(s)) == 0) {
1220			list = xreallocarray(list, (*size) + 1, sizeof *list);
1221			list[(*size)++] = *layout;
1222		}
1223	}
1224	return (list);
1225}
1226
1227/* Find longest prefix. */
1228char *
1229status_prompt_complete_prefix(const char **list, u_int size)
1230{
1231	char	 *out;
1232	u_int	  i;
1233	size_t	  j;
1234
1235	out = xstrdup(list[0]);
1236	for (i = 1; i < size; i++) {
1237		j = strlen(list[i]);
1238		if (j > strlen(out))
1239			j = strlen(out);
1240		for (; j > 0; j--) {
1241			if (out[j - 1] != list[i][j - 1])
1242				out[j - 1] = '\0';
1243		}
1244	}
1245	return (out);
1246}
1247
1248/* Complete word. */
1249char *
1250status_prompt_complete(struct session *sess, const char *s)
1251{
1252	const char	**list = NULL, *colon;
1253	u_int		  size = 0, i;
1254	struct session	 *s_loop;
1255	struct winlink	 *wl;
1256	struct window	 *w;
1257	char		 *copy, *out, *tmp;
1258
1259	if (*s == '\0')
1260		return (NULL);
1261	out = NULL;
1262
1263	if (strncmp(s, "-t", 2) != 0 && strncmp(s, "-s", 2) != 0) {
1264		list = status_prompt_complete_list(&size, s);
1265		if (size == 0)
1266			out = NULL;
1267		else if (size == 1)
1268			xasprintf(&out, "%s ", list[0]);
1269		else
1270			out = status_prompt_complete_prefix(list, size);
1271		free(list);
1272		return (out);
1273	}
1274	copy = xstrdup(s);
1275
1276	colon = ":";
1277	if (copy[strlen(copy) - 1] == ':')
1278		copy[strlen(copy) - 1] = '\0';
1279	else
1280		colon = "";
1281	s = copy + 2;
1282
1283	RB_FOREACH(s_loop, sessions, &sessions) {
1284		if (strncmp(s_loop->name, s, strlen(s)) == 0) {
1285			list = xreallocarray(list, size + 2, sizeof *list);
1286			list[size++] = s_loop->name;
1287		}
1288	}
1289	if (size == 1) {
1290		out = xstrdup(list[0]);
1291		if (session_find(list[0]) != NULL)
1292			colon = ":";
1293	} else if (size != 0)
1294		out = status_prompt_complete_prefix(list, size);
1295	if (out != NULL) {
1296		xasprintf(&tmp, "-%c%s%s", copy[1], out, colon);
1297		out = tmp;
1298		goto found;
1299	}
1300
1301	colon = "";
1302	if (*s == ':') {
1303		RB_FOREACH(wl, winlinks, &sess->windows) {
1304			xasprintf(&tmp, ":%s", wl->window->name);
1305			if (strncmp(tmp, s, strlen(s)) == 0){
1306				list = xreallocarray(list, size + 1,
1307				    sizeof *list);
1308				list[size++] = tmp;
1309				continue;
1310			}
1311			free(tmp);
1312
1313			xasprintf(&tmp, ":%d", wl->idx);
1314			if (strncmp(tmp, s, strlen(s)) == 0) {
1315				list = xreallocarray(list, size + 1,
1316				    sizeof *list);
1317				list[size++] = tmp;
1318				continue;
1319			}
1320			free(tmp);
1321		}
1322	} else {
1323		RB_FOREACH(s_loop, sessions, &sessions) {
1324			RB_FOREACH(wl, winlinks, &s_loop->windows) {
1325				w = wl->window;
1326
1327				xasprintf(&tmp, "%s:%s", s_loop->name, w->name);
1328				if (strncmp(tmp, s, strlen(s)) == 0) {
1329					list = xreallocarray(list, size + 1,
1330					    sizeof *list);
1331					list[size++] = tmp;
1332					continue;
1333				}
1334				free(tmp);
1335
1336				xasprintf(&tmp, "%s:%d", s_loop->name, wl->idx);
1337				if (strncmp(tmp, s, strlen(s)) == 0) {
1338					list = xreallocarray(list, size + 1,
1339					    sizeof *list);
1340					list[size++] = tmp;
1341					continue;
1342				}
1343				free(tmp);
1344			}
1345		}
1346	}
1347	if (size == 1) {
1348		out = xstrdup(list[0]);
1349		colon = " ";
1350	} else if (size != 0)
1351		out = status_prompt_complete_prefix(list, size);
1352	if (out != NULL) {
1353		xasprintf(&tmp, "-%c%s%s", copy[1], out, colon);
1354		out = tmp;
1355	}
1356
1357	for (i = 0; i < size; i++)
1358		free((void *)list[i]);
1359
1360found:
1361	free(copy);
1362	free(list);
1363	return (out);
1364}
1365