status.c revision 1.27 
1/* $OpenBSD: status.c,v 1.27 2009/08/19 10:39:50 nicm Exp $ */
2
3/*
4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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_replace_popen(char **);
33size_t	status_width(struct winlink *);
34char   *status_print(struct session *, struct winlink *, struct grid_cell *);
35
36void	status_prompt_add_history(struct client *);
37char   *status_prompt_complete(const char *);
38
39/* Draw status for client on the last lines of given context. */
40int
41status_redraw(struct client *c)
42{
43	struct screen_write_ctx		ctx;
44	struct session		       *s = c->session;
45	struct winlink		       *wl;
46	struct screen		      	old_status;
47	char		 	       *left, *right, *text, *ptr;
48	size_t				llen, llen2, rlen, rlen2, offset;
49	size_t				ox, xx, yy, size, start, width;
50	struct grid_cell	        stdgc, sl_stdgc, sr_stdgc, gc;
51	int				larrow, rarrow, utf8flag;
52	int				sl_fg, sl_bg, sr_fg, sr_bg;
53	int				sl_attr, sr_attr;
54
55	left = right = NULL;
56
57	/* No status line?*/
58	if (c->tty.sy == 0 || !options_get_number(&s->options, "status"))
59		return (1);
60	larrow = rarrow = 0;
61
62	/* Create the target screen. */
63	memcpy(&old_status, &c->status, sizeof old_status);
64	screen_init(&c->status, c->tty.sx, 1, 0);
65
66	if (gettimeofday(&c->status_timer, NULL) != 0)
67		fatal("gettimeofday");
68	memcpy(&stdgc, &grid_default_cell, sizeof gc);
69	stdgc.fg = options_get_number(&s->options, "status-fg");
70	stdgc.bg = options_get_number(&s->options, "status-bg");
71	stdgc.attr |= options_get_number(&s->options, "status-attr");
72
73	/*
74	 * Set the status-left and status-right parts to the default status
75	 * line options and only change them where they differ from the
76	 * defaults.
77	 */
78	memcpy(&sl_stdgc, &stdgc, sizeof sl_stdgc);
79	memcpy(&sr_stdgc, &stdgc, sizeof sr_stdgc);
80	sl_fg = options_get_number(&s->options, "status-left-fg");
81	if (sl_fg != 8)
82		sl_stdgc.fg = sl_fg;
83	sl_bg = options_get_number(&s->options, "status-left-bg");
84	if (sl_bg != 8)
85		sl_stdgc.bg = sl_bg;
86	sl_attr = options_get_number(&s->options, "status-left-attr");
87	if (sl_attr != 0)
88		sl_stdgc.attr = sl_attr;
89	sr_fg = options_get_number(&s->options, "status-right-fg");
90	if (sr_fg != 8)
91		sr_stdgc.fg = sr_fg;
92	sr_bg = options_get_number(&s->options, "status-right-bg");
93	if (sr_bg != 8)
94		sr_stdgc.bg = sr_bg;
95	sr_attr = options_get_number(&s->options, "status-right-attr");
96	if (sr_attr != 0)
97		sr_stdgc.attr = sr_attr;
98
99	yy = c->tty.sy - 1;
100	if (yy == 0)
101		goto blank;
102
103	/* Caring about UTF-8 in status line? */
104	utf8flag = options_get_number(&s->options, "status-utf8");
105
106	/* Work out the left and right strings. */
107	left = status_replace(s, options_get_string(
108	    &s->options, "status-left"), c->status_timer.tv_sec);
109	llen = options_get_number(&s->options, "status-left-length");
110	llen2 = screen_write_strlen(utf8flag, "%s", left);
111	if (llen2 < llen)
112		llen = llen2;
113
114	right = status_replace(s, options_get_string(
115	    &s->options, "status-right"), c->status_timer.tv_sec);
116	rlen = options_get_number(&s->options, "status-right-length");
117	rlen2 = screen_write_strlen(utf8flag, "%s", right);
118	if (rlen2 < rlen)
119		rlen = rlen2;
120
121	/*
122	 * Figure out how much space we have for the window list. If there isn't
123	 * enough space, just wimp out.
124	 */
125	xx = 0;
126	if (llen != 0)
127		xx += llen + 1;
128	if (rlen != 0)
129		xx += rlen + 1;
130	if (c->tty.sx == 0 || c->tty.sx <= xx)
131		goto blank;
132	xx = c->tty.sx - xx;
133
134	/*
135	 * Right. We have xx characters to fill. Find out how much is to go in
136	 * them and the offset of the current window (it must be on screen).
137	 */
138	width = offset = 0;
139	RB_FOREACH(wl, winlinks, &s->windows) {
140		size = status_width(wl) + 1;
141		if (wl == s->curw)
142			offset = width;
143		width += size;
144	}
145	start = 0;
146
147	/* If there is enough space for the total width, all is gravy. */
148	if (width <= xx)
149		goto draw;
150
151	/* Find size of current window text. */
152	size = status_width(s->curw);
153
154	/*
155	 * If the offset is already on screen, we're good to draw from the
156	 * start and just leave off the end.
157	 */
158	if (offset + size < xx) {
159		if (xx > 0) {
160			rarrow = 1;
161			xx--;
162		}
163
164		width = xx;
165		goto draw;
166	}
167
168	/*
169	 * Work out how many characters we need to omit from the start. There
170	 * are xx characters to fill, and offset + size must be the last. So,
171	 * the start character is offset + size - xx.
172	 */
173	if (xx > 0) {
174		larrow = 1;
175		xx--;
176	}
177
178	start = offset + size - xx;
179 	if (xx > 0 && width > start + xx + 1) { /* + 1, eh? */
180 		rarrow = 1;
181 		start++;
182 		xx--;
183 	}
184 	width = xx;
185
186draw:
187	/* Bail here if anything is too small too. XXX. */
188	if (width == 0 || xx == 0)
189		goto blank;
190
191 	/* Begin drawing and move to the starting position. */
192	screen_write_start(&ctx, NULL, &c->status);
193	if (llen != 0) {
194 		screen_write_cursormove(&ctx, 0, yy);
195		screen_write_nputs(&ctx, llen, &sl_stdgc, utf8flag, "%s", left);
196		screen_write_putc(&ctx, &stdgc, ' ');
197		if (larrow)
198			screen_write_putc(&ctx, &stdgc, ' ');
199	} else {
200		if (larrow)
201			screen_write_cursormove(&ctx, 1, yy);
202		else
203			screen_write_cursormove(&ctx, 0, yy);
204	}
205
206	ox = 0;
207	if (width < xx) {
208		switch (options_get_number(&s->options, "status-justify")) {
209		case 1:	/* centered */
210			ox = 1 + (xx - width) / 2;
211			break;
212		case 2:	/* right */
213			ox = 1 + (xx - width);
214			break;
215		}
216		xx -= ox;
217		while (ox-- > 0)
218			screen_write_putc(&ctx, &stdgc, ' ');
219	}
220
221	/* Draw each character in succession. */
222	offset = 0;
223	RB_FOREACH(wl, winlinks, &s->windows) {
224		memcpy(&gc, &stdgc, sizeof gc);
225		text = status_print(s, wl, &gc);
226
227		if (larrow == 1 && offset < start) {
228			if (session_alert_has(s, wl, WINDOW_ACTIVITY))
229				larrow = -1;
230			else if (session_alert_has(s, wl, WINDOW_BELL))
231				larrow = -1;
232			else if (session_alert_has(s, wl, WINDOW_CONTENT))
233				larrow = -1;
234		}
235
236 		for (ptr = text; *ptr != '\0'; ptr++) {
237			if (offset >= start && offset < start + width)
238				screen_write_putc(&ctx, &gc, *ptr);
239			offset++;
240		}
241
242		if (rarrow == 1 && offset > start + width) {
243			if (session_alert_has(s, wl, WINDOW_ACTIVITY))
244				rarrow = -1;
245			else if (session_alert_has(s, wl, WINDOW_BELL))
246				rarrow = -1;
247			else if (session_alert_has(s, wl, WINDOW_CONTENT))
248				rarrow = -1;
249		}
250
251		if (offset < start + width) {
252			if (offset >= start) {
253				screen_write_putc(&ctx, &stdgc, ' ');
254			}
255			offset++;
256		}
257
258		xfree(text);
259	}
260
261	/* Fill the remaining space if any. */
262 	while (offset++ < xx)
263		screen_write_putc(&ctx, &stdgc, ' ');
264
265	/* Draw the last item. */
266	if (rlen != 0) {
267		screen_write_cursormove(&ctx, c->tty.sx - rlen - 1, yy);
268		screen_write_putc(&ctx, &stdgc, ' ');
269		screen_write_nputs(&ctx, rlen, &sr_stdgc, utf8flag, "%s", right);
270	}
271
272	/* Draw the arrows. */
273	if (larrow != 0) {
274		memcpy(&gc, &stdgc, sizeof gc);
275		if (larrow == -1)
276			gc.attr ^= GRID_ATTR_REVERSE;
277		if (llen != 0)
278			screen_write_cursormove(&ctx, llen + 1, yy);
279		else
280			screen_write_cursormove(&ctx, 0, yy);
281		screen_write_putc(&ctx, &gc, '<');
282	}
283	if (rarrow != 0) {
284		memcpy(&gc, &stdgc, sizeof gc);
285		if (rarrow == -1)
286			gc.attr ^= GRID_ATTR_REVERSE;
287		if (rlen != 0)
288			screen_write_cursormove(&ctx, c->tty.sx - rlen - 2, yy);
289		else
290			screen_write_cursormove(&ctx, c->tty.sx - 1, yy);
291		screen_write_putc(&ctx, &gc, '>');
292	}
293
294	goto out;
295
296blank:
297 	/* Just draw the whole line as blank. */
298	screen_write_start(&ctx, NULL, &c->status);
299	screen_write_cursormove(&ctx, 0, yy);
300	for (offset = 0; offset < c->tty.sx; offset++)
301		screen_write_putc(&ctx, &stdgc, ' ');
302
303out:
304	screen_write_stop(&ctx);
305
306	if (left != NULL)
307		xfree(left);
308	if (right != NULL)
309		xfree(right);
310
311	if (grid_compare(c->status.grid, old_status.grid) == 0) {
312		screen_free(&old_status);
313		return (0);
314	}
315	screen_free(&old_status);
316	return (1);
317}
318
319char *
320status_replace(struct session *s, const char *fmt, time_t t)
321{
322	struct winlink *wl = s->curw;
323	static char	out[BUFSIZ];
324	char		in[BUFSIZ], tmp[256], ch, *iptr, *optr, *ptr, *endptr;
325	char           *savedptr;
326	size_t		len;
327	long		n;
328
329	strftime(in, sizeof in, fmt, localtime(&t));
330	in[(sizeof in) - 1] = '\0';
331
332	iptr = in;
333	optr = out;
334	savedptr = NULL;
335
336	while (*iptr != '\0') {
337		if (optr >= out + (sizeof out) - 1)
338			break;
339		switch (ch = *iptr++) {
340		case '#':
341			errno = 0;
342			n = strtol(iptr, &endptr, 10);
343			if ((n == 0 && errno != EINVAL) ||
344			    (n == LONG_MIN && errno != ERANGE) ||
345			    (n == LONG_MAX && errno != ERANGE) ||
346			    n != 0)
347				iptr = endptr;
348			if (n <= 0)
349				n = LONG_MAX;
350
351			ptr = NULL;
352			switch (*iptr++) {
353			case '(':
354				if (ptr == NULL) {
355					ptr = status_replace_popen(&iptr);
356					if (ptr == NULL)
357						break;
358					savedptr = ptr;
359				}
360				/* FALLTHROUGH */
361			case 'H':
362				if (ptr == NULL) {
363					if (gethostname(tmp, sizeof tmp) != 0)
364						fatal("gethostname");
365					ptr = tmp;
366				}
367				/* FALLTHROUGH */
368			case 'I':
369				if (ptr == NULL) {
370					xsnprintf(tmp, sizeof tmp, "%d", wl->idx);
371					ptr = tmp;
372				}
373				/* FALLTHROUGH */
374			case 'P':
375				if (ptr == NULL) {
376					xsnprintf(tmp, sizeof tmp, "%u",
377						  window_pane_index(wl->window,
378						  wl->window->active));
379					ptr = tmp;
380				}
381				/* FALLTHROUGH */
382			case 'S':
383				if (ptr == NULL)
384					ptr = s->name;
385				/* FALLTHROUGH */
386			case 'T':
387				if (ptr == NULL)
388					ptr = wl->window->active->base.title;
389				/* FALLTHROUGH */
390			case 'W':
391				if (ptr == NULL)
392					ptr = wl->window->name;
393				len = strlen(ptr);
394				if ((size_t) n < len)
395					len = n;
396				if (optr + len >= out + (sizeof out) - 1)
397					break;
398				while (len > 0 && *ptr != '\0') {
399					*optr++ = *ptr++;
400					len--;
401				}
402				break;
403			case '#':
404				*optr++ = '#';
405				break;
406			}
407			if (savedptr != NULL) {
408				xfree(savedptr);
409				savedptr = NULL;
410			}
411			break;
412		default:
413			*optr++ = ch;
414			break;
415		}
416	}
417	*optr = '\0';
418
419	return (xstrdup(out));
420}
421
422char *
423status_replace_popen(char **iptr)
424{
425	FILE	*f;
426	char	*buf, *cmd, *ptr;
427	int	lastesc;
428	size_t	len;
429
430	if (**iptr == '\0')
431		return (NULL);
432	if (**iptr == ')') {		/* no command given */
433		(*iptr)++;
434		return (NULL);
435	}
436
437	buf = NULL;
438
439	cmd = xmalloc(strlen(*iptr) + 1);
440	len = 0;
441
442	lastesc = 0;
443	for (; **iptr != '\0'; (*iptr)++) {
444		if (!lastesc && **iptr == ')')
445			break;		/* unescaped ) is the end */
446		if (!lastesc && **iptr == '\\') {
447			lastesc = 1;
448			continue;	/* skip \ if not escaped */
449		}
450		lastesc = 0;
451		cmd[len++] = **iptr;
452	}
453	if (**iptr == '\0')		/* no terminating ) */
454		goto out;
455	(*iptr)++;			/* skip final ) */
456	cmd[len] = '\0';
457
458	if ((f = popen(cmd, "r")) == NULL)
459		goto out;
460
461	if ((buf = fgetln(f, &len)) == NULL) {
462		pclose(f);
463		goto out;
464	}
465	if (buf[len - 1] == '\n') {
466		buf[len - 1] = '\0';
467		buf = xstrdup(buf);
468	} else {
469		ptr = xmalloc(len + 1);
470		memcpy(ptr, buf, len);
471		ptr[len] = '\0';
472		buf = ptr;
473	}
474	pclose(f);
475
476out:
477	xfree(cmd);
478	return (buf);
479}
480
481size_t
482status_width(struct winlink *wl)
483{
484	return (xsnprintf(NULL, 0, "%d:%s ", wl->idx, wl->window->name));
485}
486
487char *
488status_print(struct session *s, struct winlink *wl, struct grid_cell *gc)
489{
490	char   *text, flag;
491	u_char	fg, bg, attr;
492
493	fg = options_get_number(&wl->window->options, "window-status-fg");
494	if (fg != 8)
495		gc->fg = fg;
496	bg = options_get_number(&wl->window->options, "window-status-bg");
497	if (bg != 8)
498		gc->bg = bg;
499	attr = options_get_number(&wl->window->options, "window-status-attr");
500	if (attr != 0)
501		gc->attr = attr;
502
503	flag = ' ';
504 	if (wl == SLIST_FIRST(&s->lastw))
505		flag = '-';
506	if (wl == s->curw) {
507		fg = options_get_number(&wl->window->options, "window-status-current-fg");
508		if (fg != 8)
509			gc->fg = fg;
510		bg = options_get_number(&wl->window->options, "window-status-current-bg");
511		if (bg != 8)
512			gc->bg = bg;
513		attr = options_get_number(&wl->window->options, "window-status-current-attr");
514		if (attr != 0)
515			gc->attr = attr;
516		flag = '*';
517	}
518
519	if (session_alert_has(s, wl, WINDOW_ACTIVITY)) {
520		flag = '#';
521		gc->attr ^= GRID_ATTR_REVERSE;
522	} else if (session_alert_has(s, wl, WINDOW_BELL)) {
523		flag = '!';
524		gc->attr ^= GRID_ATTR_REVERSE;
525	} else if (session_alert_has(s, wl, WINDOW_CONTENT)) {
526		flag = '+';
527		gc->attr ^= GRID_ATTR_REVERSE;
528	}
529
530	xasprintf(&text, "%d:%s%c", wl->idx, wl->window->name, flag);
531	return (text);
532}
533
534void printflike2
535status_message_set(struct client *c, const char *fmt, ...)
536{
537	struct timeval	tv;
538	va_list		ap;
539	int		delay;
540
541	status_prompt_clear(c);
542	status_message_clear(c);
543
544	delay = options_get_number(&c->session->options, "display-time");
545	tv.tv_sec = delay / 1000;
546	tv.tv_usec = (delay % 1000) * 1000L;
547
548	va_start(ap, fmt);
549	xvasprintf(&c->message_string, fmt, ap);
550	va_end(ap);
551	if (gettimeofday(&c->message_timer, NULL) != 0)
552		fatal("gettimeofday");
553	timeradd(&c->message_timer, &tv, &c->message_timer);
554
555	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
556	c->flags |= CLIENT_STATUS;
557}
558
559void
560status_message_clear(struct client *c)
561{
562	if (c->message_string == NULL)
563		return;
564
565	xfree(c->message_string);
566	c->message_string = NULL;
567
568	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
569	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
570
571	screen_reinit(&c->status);
572}
573
574/* Draw client message on status line of present else on last line. */
575int
576status_message_redraw(struct client *c)
577{
578	struct screen_write_ctx		ctx;
579	struct session		       *s = c->session;
580	struct screen		        old_status;
581	size_t			        len;
582	struct grid_cell		gc;
583
584	if (c->tty.sx == 0 || c->tty.sy == 0)
585		return (0);
586	memcpy(&old_status, &c->status, sizeof old_status);
587	screen_init(&c->status, c->tty.sx, 1, 0);
588
589	len = strlen(c->message_string);
590	if (len > c->tty.sx)
591		len = c->tty.sx;
592
593	memcpy(&gc, &grid_default_cell, sizeof gc);
594	gc.fg = options_get_number(&s->options, "message-fg");
595	gc.bg = options_get_number(&s->options, "message-bg");
596	gc.attr |= options_get_number(&s->options, "message-attr");
597
598	screen_write_start(&ctx, NULL, &c->status);
599
600	screen_write_cursormove(&ctx, 0, 0);
601	screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->message_string);
602	for (; len < c->tty.sx; len++)
603		screen_write_putc(&ctx, &gc, ' ');
604
605	screen_write_stop(&ctx);
606
607	if (grid_compare(c->status.grid, old_status.grid) == 0) {
608		screen_free(&old_status);
609		return (0);
610	}
611	screen_free(&old_status);
612	return (1);
613}
614
615void
616status_prompt_set(struct client *c, const char *msg,
617    int (*callbackfn)(void *, const char *), void (*freefn)(void *),
618    void *data, int flags)
619{
620	int	keys;
621
622	status_message_clear(c);
623	status_prompt_clear(c);
624
625	c->prompt_string = xstrdup(msg);
626
627	c->prompt_buffer = xstrdup("");
628	c->prompt_index = 0;
629
630	c->prompt_callbackfn = callbackfn;
631	c->prompt_freefn = freefn;
632	c->prompt_data = data;
633
634	c->prompt_hindex = 0;
635
636	c->prompt_flags = flags;
637
638	keys = options_get_number(&c->session->options, "status-keys");
639	if (keys == MODEKEY_EMACS)
640		mode_key_init(&c->prompt_mdata, &mode_key_tree_emacs_edit);
641	else
642		mode_key_init(&c->prompt_mdata, &mode_key_tree_vi_edit);
643
644	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
645	c->flags |= CLIENT_STATUS;
646}
647
648void
649status_prompt_clear(struct client *c)
650{
651 	if (c->prompt_string == NULL)
652		return;
653
654	if (c->prompt_freefn != NULL && c->prompt_data != NULL)
655		c->prompt_freefn(c->prompt_data);
656
657	xfree(c->prompt_string);
658	c->prompt_string = NULL;
659
660	if (c->prompt_flags & PROMPT_HIDDEN)
661		memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
662	xfree(c->prompt_buffer);
663	c->prompt_buffer = NULL;
664
665	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
666	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
667
668	screen_reinit(&c->status);
669}
670
671void
672status_prompt_update(struct client *c, const char *msg)
673{
674	xfree(c->prompt_string);
675	c->prompt_string = xstrdup(msg);
676
677	*c->prompt_buffer = '\0';
678	c->prompt_index = 0;
679
680	c->prompt_hindex = 0;
681
682	c->flags |= CLIENT_STATUS;
683}
684
685/* Draw client prompt on status line of present else on last line. */
686int
687status_prompt_redraw(struct client *c)
688{
689	struct screen_write_ctx	ctx;
690	struct session		       *s = c->session;
691	struct screen		        old_status;
692	size_t			        i, size, left, len, off, n;
693	char				ch;
694	struct grid_cell		gc;
695
696	if (c->tty.sx == 0 || c->tty.sy == 0)
697		return (0);
698	memcpy(&old_status, &c->status, sizeof old_status);
699	screen_init(&c->status, c->tty.sx, 1, 0);
700	off = 0;
701
702	len = strlen(c->prompt_string);
703	if (len > c->tty.sx)
704		len = c->tty.sx;
705
706	memcpy(&gc, &grid_default_cell, sizeof gc);
707	gc.fg = options_get_number(&s->options, "message-fg");
708	gc.bg = options_get_number(&s->options, "message-bg");
709	gc.attr |= options_get_number(&s->options, "message-attr");
710
711	screen_write_start(&ctx, NULL, &c->status);
712
713	screen_write_cursormove(&ctx, 0, 0);
714	screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->prompt_string);
715
716	left = c->tty.sx - len;
717	if (left != 0) {
718		if (c->prompt_index < left)
719			size = strlen(c->prompt_buffer);
720		else {
721			off = c->prompt_index - left + 1;
722			if (c->prompt_index == strlen(c->prompt_buffer))
723				left--;
724			size = left;
725		}
726		if (c->prompt_flags & PROMPT_HIDDEN) {
727			n = strlen(c->prompt_buffer);
728			if (n > left)
729				n = left;
730			for (i = 0; i < n; i++)
731				screen_write_putc(&ctx, &gc, '*');
732		} else {
733			screen_write_puts(&ctx, &gc,
734			    "%.*s", (int) left, c->prompt_buffer + off);
735		}
736
737		for (i = len + size; i < c->tty.sx; i++)
738			screen_write_putc(&ctx, &gc, ' ');
739
740		/* Draw a fake cursor. */
741		screen_write_cursormove(&ctx, len + c->prompt_index - off, 0);
742		if (c->prompt_index == strlen(c->prompt_buffer))
743			ch = ' ';
744		else {
745			if (c->prompt_flags & PROMPT_HIDDEN)
746				ch = '*';
747			else
748				ch = c->prompt_buffer[c->prompt_index];
749		}
750		if (ch == '\0')
751			ch = ' ';
752		gc.attr ^= GRID_ATTR_REVERSE;
753		screen_write_putc(&ctx, &gc, ch);
754	}
755
756	screen_write_stop(&ctx);
757
758	if (grid_compare(c->status.grid, old_status.grid) == 0) {
759		screen_free(&old_status);
760		return (0);
761	}
762	screen_free(&old_status);
763	return (1);
764}
765
766/* Handle keys in prompt. */
767void
768status_prompt_key(struct client *c, int key)
769{
770	struct paste_buffer	*pb;
771	char   			*s, *first, *last, word[64];
772	size_t			 size, n, off, idx;
773
774	size = strlen(c->prompt_buffer);
775	switch (mode_key_lookup(&c->prompt_mdata, key)) {
776	case MODEKEYEDIT_CURSORLEFT:
777		if (c->prompt_index > 0) {
778			c->prompt_index--;
779			c->flags |= CLIENT_STATUS;
780		}
781		break;
782	case MODEKEYEDIT_SWITCHMODEAPPEND:
783	case MODEKEYEDIT_CURSORRIGHT:
784		if (c->prompt_index < size) {
785			c->prompt_index++;
786			c->flags |= CLIENT_STATUS;
787		}
788		break;
789	case MODEKEYEDIT_STARTOFLINE:
790		if (c->prompt_index != 0) {
791			c->prompt_index = 0;
792			c->flags |= CLIENT_STATUS;
793		}
794		break;
795	case MODEKEYEDIT_ENDOFLINE:
796		if (c->prompt_index != size) {
797			c->prompt_index = size;
798			c->flags |= CLIENT_STATUS;
799		}
800		break;
801	case MODEKEYEDIT_COMPLETE:
802		if (*c->prompt_buffer == '\0')
803			break;
804
805		idx = c->prompt_index;
806		if (idx != 0)
807			idx--;
808
809		/* Find the word we are in. */
810		first = c->prompt_buffer + idx;
811		while (first > c->prompt_buffer && *first != ' ')
812			first--;
813		while (*first == ' ')
814			first++;
815		last = c->prompt_buffer + idx;
816		while (*last != '\0' && *last != ' ')
817			last++;
818		while (*last == ' ')
819			last--;
820		if (*last != '\0')
821			last++;
822		if (last <= first ||
823		    ((size_t) (last - first)) > (sizeof word) - 1)
824			break;
825		memcpy(word, first, last - first);
826		word[last - first] = '\0';
827
828		/* And try to complete it. */
829		if ((s = status_prompt_complete(word)) == NULL)
830			break;
831
832		/* Trim out word. */
833		n = size - (last - c->prompt_buffer) + 1; /* with \0 */
834		memmove(first, last, n);
835		size -= last - first;
836
837		/* Insert the new word. */
838 		size += strlen(s);
839		off = first - c->prompt_buffer;
840 		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 1);
841		first = c->prompt_buffer + off;
842 		memmove(first + strlen(s), first, n);
843 		memcpy(first, s, strlen(s));
844
845		c->prompt_index = (first - c->prompt_buffer) + strlen(s);
846		xfree(s);
847
848		c->flags |= CLIENT_STATUS;
849		break;
850	case MODEKEYEDIT_BACKSPACE:
851		if (c->prompt_index != 0) {
852			if (c->prompt_index == size)
853				c->prompt_buffer[--c->prompt_index] = '\0';
854			else {
855				memmove(c->prompt_buffer + c->prompt_index - 1,
856				    c->prompt_buffer + c->prompt_index,
857				    size + 1 - c->prompt_index);
858				c->prompt_index--;
859			}
860			c->flags |= CLIENT_STATUS;
861		}
862		break;
863 	case MODEKEYEDIT_DELETE:
864		if (c->prompt_index != size) {
865			memmove(c->prompt_buffer + c->prompt_index,
866			    c->prompt_buffer + c->prompt_index + 1,
867			    size + 1 - c->prompt_index);
868			c->flags |= CLIENT_STATUS;
869		}
870		break;
871	case MODEKEYEDIT_DELETELINE:
872		*c->prompt_buffer = '\0';
873		c->prompt_index = 0;
874		c->flags |= CLIENT_STATUS;
875		break;
876	case MODEKEYEDIT_DELETETOENDOFLINE:
877		if (c->prompt_index < size) {
878			c->prompt_buffer[c->prompt_index] = '\0';
879			c->flags |= CLIENT_STATUS;
880		}
881		break;
882	case MODEKEYEDIT_HISTORYUP:
883		if (server_locked)
884			break;
885
886		if (ARRAY_LENGTH(&c->prompt_hdata) == 0)
887			break;
888		if (c->prompt_flags & PROMPT_HIDDEN)
889			memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
890	       	xfree(c->prompt_buffer);
891
892		c->prompt_buffer = xstrdup(ARRAY_ITEM(&c->prompt_hdata,
893		    ARRAY_LENGTH(&c->prompt_hdata) - 1 - c->prompt_hindex));
894		if (c->prompt_hindex != ARRAY_LENGTH(&c->prompt_hdata) - 1)
895			c->prompt_hindex++;
896
897		c->prompt_index = strlen(c->prompt_buffer);
898		c->flags |= CLIENT_STATUS;
899		break;
900	case MODEKEYEDIT_HISTORYDOWN:
901		if (server_locked)
902			break;
903
904		if (c->prompt_flags & PROMPT_HIDDEN)
905			memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
906		xfree(c->prompt_buffer);
907
908		if (c->prompt_hindex != 0) {
909			c->prompt_hindex--;
910			c->prompt_buffer = xstrdup(ARRAY_ITEM(
911			    &c->prompt_hdata, ARRAY_LENGTH(
912			    &c->prompt_hdata) - 1 - c->prompt_hindex));
913		} else
914			c->prompt_buffer = xstrdup("");
915
916		c->prompt_index = strlen(c->prompt_buffer);
917		c->flags |= CLIENT_STATUS;
918		break;
919	case MODEKEYEDIT_PASTE:
920		if ((pb = paste_get_top(&c->session->buffers)) == NULL)
921			break;
922		if ((last = strchr(pb->data, '\n')) == NULL)
923			last = strchr(pb->data, '\0');
924		n = last - pb->data;
925
926		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + n + 1);
927		if (c->prompt_index == size) {
928			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
929			c->prompt_index += n;
930			c->prompt_buffer[c->prompt_index] = '\0';
931		} else {
932			memmove(c->prompt_buffer + c->prompt_index + n,
933			    c->prompt_buffer + c->prompt_index,
934			    size + 1 - c->prompt_index);
935			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
936			c->prompt_index += n;
937		}
938
939		c->flags |= CLIENT_STATUS;
940		break;
941 	case MODEKEYEDIT_ENTER:
942		if (*c->prompt_buffer != '\0')
943			status_prompt_add_history(c);
944		if (c->prompt_callbackfn(c->prompt_data, c->prompt_buffer) == 0)
945			status_prompt_clear(c);
946		break;
947	case MODEKEYEDIT_CANCEL:
948		if (c->prompt_callbackfn(c->prompt_data, NULL) == 0)
949			status_prompt_clear(c);
950		break;
951	case MODEKEY_OTHER:
952		if (key < 32 || key > 126)
953			break;
954		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 2);
955
956		if (c->prompt_index == size) {
957			c->prompt_buffer[c->prompt_index++] = key;
958			c->prompt_buffer[c->prompt_index] = '\0';
959		} else {
960			memmove(c->prompt_buffer + c->prompt_index + 1,
961			    c->prompt_buffer + c->prompt_index,
962			    size + 1 - c->prompt_index);
963			c->prompt_buffer[c->prompt_index++] = key;
964		}
965
966		if (c->prompt_flags & PROMPT_SINGLE) {
967			if (c->prompt_callbackfn(
968			    c->prompt_data, c->prompt_buffer) == 0)
969				status_prompt_clear(c);
970		}
971
972		c->flags |= CLIENT_STATUS;
973		break;
974	default:
975		break;
976	}
977}
978
979/* Add line to the history. */
980void
981status_prompt_add_history(struct client *c)
982{
983	if (server_locked)
984		return;
985
986	if (ARRAY_LENGTH(&c->prompt_hdata) > 0 &&
987	    strcmp(ARRAY_LAST(&c->prompt_hdata), c->prompt_buffer) == 0)
988		return;
989
990	if (ARRAY_LENGTH(&c->prompt_hdata) == PROMPT_HISTORY) {
991		xfree(ARRAY_FIRST(&c->prompt_hdata));
992		ARRAY_REMOVE(&c->prompt_hdata, 0);
993	}
994
995	ARRAY_ADD(&c->prompt_hdata, xstrdup(c->prompt_buffer));
996}
997
998/* Complete word. */
999char *
1000status_prompt_complete(const char *s)
1001{
1002	const struct cmd_entry 	      **cmdent;
1003	const struct set_option_entry  *optent;
1004	ARRAY_DECL(, const char *)	list;
1005	char			       *prefix, *s2;
1006	u_int				i;
1007	size_t			 	j;
1008
1009	if (*s == '\0')
1010		return (NULL);
1011
1012	/* First, build a list of all the possible matches. */
1013	ARRAY_INIT(&list);
1014	for (cmdent = cmd_table; *cmdent != NULL; cmdent++) {
1015		if (strncmp((*cmdent)->name, s, strlen(s)) == 0)
1016			ARRAY_ADD(&list, (*cmdent)->name);
1017	}
1018	for (optent = set_option_table; optent->name != NULL; optent++) {
1019		if (strncmp(optent->name, s, strlen(s)) == 0)
1020			ARRAY_ADD(&list, optent->name);
1021	}
1022	for (optent = set_window_option_table; optent->name != NULL; optent++) {
1023		if (strncmp(optent->name, s, strlen(s)) == 0)
1024			ARRAY_ADD(&list, optent->name);
1025	}
1026
1027	/* If none, bail now. */
1028	if (ARRAY_LENGTH(&list) == 0) {
1029		ARRAY_FREE(&list);
1030		return (NULL);
1031	}
1032
1033	/* If an exact match, return it, with a trailing space. */
1034	if (ARRAY_LENGTH(&list) == 1) {
1035		xasprintf(&s2, "%s ", ARRAY_FIRST(&list));
1036		ARRAY_FREE(&list);
1037		return (s2);
1038	}
1039
1040	/* Now loop through the list and find the longest common prefix. */
1041	prefix = xstrdup(ARRAY_FIRST(&list));
1042	for (i = 1; i < ARRAY_LENGTH(&list); i++) {
1043		s = ARRAY_ITEM(&list, i);
1044
1045		j = strlen(s);
1046		if (j > strlen(prefix))
1047			j = strlen(prefix);
1048		for (; j > 0; j--) {
1049			if (prefix[j - 1] != s[j - 1])
1050				prefix[j - 1] = '\0';
1051		}
1052	}
1053
1054	ARRAY_FREE(&list);
1055	return (prefix);
1056}
1057