status.c revision 1.31 
1/* $OpenBSD: status.c,v 1.31 2009/09/07 10:49:32 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_cstrlen(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_cstrlen(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_cnputs(&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_cnputs(&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				/*
405				 * Embedded style, handled at display time.
406				 * Leave present and skip input until ].
407				 */
408				*optr++ = '#';
409
410				iptr--;	/* include [ */
411				while (*iptr != ']' && *iptr != '\0') {
412					if (optr >= out + (sizeof out) - 1)
413						break;
414					*optr++ = *iptr++;
415				}
416				break;
417			case '#':
418				*optr++ = '#';
419				break;
420			}
421			if (savedptr != NULL) {
422				xfree(savedptr);
423				savedptr = NULL;
424			}
425			break;
426		default:
427			*optr++ = ch;
428			break;
429		}
430	}
431	*optr = '\0';
432
433	return (xstrdup(out));
434}
435
436char *
437status_replace_popen(char **iptr)
438{
439	FILE	*f;
440	char	*buf, *cmd, *ptr;
441	int	lastesc;
442	size_t	len;
443
444	if (**iptr == '\0')
445		return (NULL);
446	if (**iptr == ')') {		/* no command given */
447		(*iptr)++;
448		return (NULL);
449	}
450
451	buf = NULL;
452
453	cmd = xmalloc(strlen(*iptr) + 1);
454	len = 0;
455
456	lastesc = 0;
457	for (; **iptr != '\0'; (*iptr)++) {
458		if (!lastesc && **iptr == ')')
459			break;		/* unescaped ) is the end */
460		if (!lastesc && **iptr == '\\') {
461			lastesc = 1;
462			continue;	/* skip \ if not escaped */
463		}
464		lastesc = 0;
465		cmd[len++] = **iptr;
466	}
467	if (**iptr == '\0')		/* no terminating ) */
468		goto out;
469	(*iptr)++;			/* skip final ) */
470	cmd[len] = '\0';
471
472	if ((f = popen(cmd, "r")) == NULL)
473		goto out;
474
475	if ((buf = fgetln(f, &len)) == NULL) {
476		pclose(f);
477		goto out;
478	}
479	if (buf[len - 1] == '\n') {
480		buf[len - 1] = '\0';
481		buf = xstrdup(buf);
482	} else {
483		ptr = xmalloc(len + 1);
484		memcpy(ptr, buf, len);
485		ptr[len] = '\0';
486		buf = ptr;
487	}
488	pclose(f);
489
490out:
491	xfree(cmd);
492	return (buf);
493}
494
495size_t
496status_width(struct winlink *wl)
497{
498	return (xsnprintf(NULL, 0, "%d:%s ", wl->idx, wl->window->name));
499}
500
501char *
502status_print(struct session *s, struct winlink *wl, struct grid_cell *gc)
503{
504	char   *text, flag;
505	u_char	fg, bg, attr;
506
507	fg = options_get_number(&wl->window->options, "window-status-fg");
508	if (fg != 8)
509		gc->fg = fg;
510	bg = options_get_number(&wl->window->options, "window-status-bg");
511	if (bg != 8)
512		gc->bg = bg;
513	attr = options_get_number(&wl->window->options, "window-status-attr");
514	if (attr != 0)
515		gc->attr = attr;
516
517	flag = ' ';
518 	if (wl == SLIST_FIRST(&s->lastw))
519		flag = '-';
520	if (wl == s->curw) {
521		fg = options_get_number(&wl->window->options, "window-status-current-fg");
522		if (fg != 8)
523			gc->fg = fg;
524		bg = options_get_number(&wl->window->options, "window-status-current-bg");
525		if (bg != 8)
526			gc->bg = bg;
527		attr = options_get_number(&wl->window->options, "window-status-current-attr");
528		if (attr != 0)
529			gc->attr = attr;
530		flag = '*';
531	}
532
533	if (session_alert_has(s, wl, WINDOW_ACTIVITY)) {
534		flag = '#';
535		gc->attr ^= GRID_ATTR_REVERSE;
536	} else if (session_alert_has(s, wl, WINDOW_BELL)) {
537		flag = '!';
538		gc->attr ^= GRID_ATTR_REVERSE;
539	} else if (session_alert_has(s, wl, WINDOW_CONTENT)) {
540		flag = '+';
541		gc->attr ^= GRID_ATTR_REVERSE;
542	}
543
544	xasprintf(&text, "%d:%s%c", wl->idx, wl->window->name, flag);
545	return (text);
546}
547
548void printflike2
549status_message_set(struct client *c, const char *fmt, ...)
550{
551	struct timeval	tv;
552	va_list		ap;
553	int		delay;
554
555	status_prompt_clear(c);
556	status_message_clear(c);
557
558	va_start(ap, fmt);
559	xvasprintf(&c->message_string, fmt, ap);
560	va_end(ap);
561
562	delay = options_get_number(&c->session->options, "display-time");
563	tv.tv_sec = delay / 1000;
564	tv.tv_usec = (delay % 1000) * 1000L;
565
566	if (gettimeofday(&c->message_timer, NULL) != 0)
567		fatal("gettimeofday");
568	timeradd(&c->message_timer, &tv, &c->message_timer);
569
570	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
571	c->flags |= CLIENT_STATUS;
572}
573
574void
575status_message_clear(struct client *c)
576{
577	if (c->message_string == NULL)
578		return;
579
580	xfree(c->message_string);
581	c->message_string = NULL;
582
583	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
584	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
585
586	screen_reinit(&c->status);
587}
588
589/* Draw client message on status line of present else on last line. */
590int
591status_message_redraw(struct client *c)
592{
593	struct screen_write_ctx		ctx;
594	struct session		       *s = c->session;
595	struct screen		        old_status;
596	size_t			        len;
597	struct grid_cell		gc;
598
599	if (c->tty.sx == 0 || c->tty.sy == 0)
600		return (0);
601	memcpy(&old_status, &c->status, sizeof old_status);
602	screen_init(&c->status, c->tty.sx, 1, 0);
603
604	len = strlen(c->message_string);
605	if (len > c->tty.sx)
606		len = c->tty.sx;
607
608	memcpy(&gc, &grid_default_cell, sizeof gc);
609	gc.fg = options_get_number(&s->options, "message-fg");
610	gc.bg = options_get_number(&s->options, "message-bg");
611	gc.attr |= options_get_number(&s->options, "message-attr");
612
613	screen_write_start(&ctx, NULL, &c->status);
614
615	screen_write_cursormove(&ctx, 0, 0);
616	screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->message_string);
617	for (; len < c->tty.sx; len++)
618		screen_write_putc(&ctx, &gc, ' ');
619
620	screen_write_stop(&ctx);
621
622	if (grid_compare(c->status.grid, old_status.grid) == 0) {
623		screen_free(&old_status);
624		return (0);
625	}
626	screen_free(&old_status);
627	return (1);
628}
629
630void
631status_prompt_set(struct client *c, const char *msg,
632    int (*callbackfn)(void *, const char *), void (*freefn)(void *),
633    void *data, int flags)
634{
635	int	keys;
636
637	status_message_clear(c);
638	status_prompt_clear(c);
639
640	c->prompt_string = xstrdup(msg);
641
642	c->prompt_buffer = xstrdup("");
643	c->prompt_index = 0;
644
645	c->prompt_callbackfn = callbackfn;
646	c->prompt_freefn = freefn;
647	c->prompt_data = data;
648
649	c->prompt_hindex = 0;
650
651	c->prompt_flags = flags;
652
653	keys = options_get_number(&c->session->options, "status-keys");
654	if (keys == MODEKEY_EMACS)
655		mode_key_init(&c->prompt_mdata, &mode_key_tree_emacs_edit);
656	else
657		mode_key_init(&c->prompt_mdata, &mode_key_tree_vi_edit);
658
659	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
660	c->flags |= CLIENT_STATUS;
661}
662
663void
664status_prompt_clear(struct client *c)
665{
666 	if (c->prompt_string == NULL)
667		return;
668
669	if (c->prompt_freefn != NULL && c->prompt_data != NULL)
670		c->prompt_freefn(c->prompt_data);
671
672	xfree(c->prompt_string);
673	c->prompt_string = NULL;
674
675	if (c->prompt_flags & PROMPT_HIDDEN)
676		memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
677	xfree(c->prompt_buffer);
678	c->prompt_buffer = NULL;
679
680	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
681	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
682
683	screen_reinit(&c->status);
684}
685
686void
687status_prompt_update(struct client *c, const char *msg)
688{
689	xfree(c->prompt_string);
690	c->prompt_string = xstrdup(msg);
691
692	*c->prompt_buffer = '\0';
693	c->prompt_index = 0;
694
695	c->prompt_hindex = 0;
696
697	c->flags |= CLIENT_STATUS;
698}
699
700/* Draw client prompt on status line of present else on last line. */
701int
702status_prompt_redraw(struct client *c)
703{
704	struct screen_write_ctx	ctx;
705	struct session		       *s = c->session;
706	struct screen		        old_status;
707	size_t			        i, size, left, len, off;
708	char				ch;
709	struct grid_cell		gc;
710
711	if (c->tty.sx == 0 || c->tty.sy == 0)
712		return (0);
713	memcpy(&old_status, &c->status, sizeof old_status);
714	screen_init(&c->status, c->tty.sx, 1, 0);
715	off = 0;
716
717	len = strlen(c->prompt_string);
718	if (len > c->tty.sx)
719		len = c->tty.sx;
720
721	memcpy(&gc, &grid_default_cell, sizeof gc);
722	gc.fg = options_get_number(&s->options, "message-fg");
723	gc.bg = options_get_number(&s->options, "message-bg");
724	gc.attr |= options_get_number(&s->options, "message-attr");
725
726	screen_write_start(&ctx, NULL, &c->status);
727
728	screen_write_cursormove(&ctx, 0, 0);
729	screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->prompt_string);
730
731	left = c->tty.sx - len;
732	if (left != 0) {
733		if (c->prompt_index < left)
734			size = strlen(c->prompt_buffer);
735		else {
736			off = c->prompt_index - left + 1;
737			if (c->prompt_index == strlen(c->prompt_buffer))
738				left--;
739			size = left;
740		}
741		if (c->prompt_flags & PROMPT_HIDDEN)
742			size = 0;
743		else {
744			screen_write_puts(&ctx, &gc,
745			    "%.*s", (int) left, c->prompt_buffer + off);
746		}
747
748		for (i = len + size; i < c->tty.sx; i++)
749			screen_write_putc(&ctx, &gc, ' ');
750
751		/* Draw a fake cursor. */
752		ch = ' ';
753		if (c->prompt_flags & PROMPT_HIDDEN)
754			screen_write_cursormove(&ctx, len, 0);
755		else {
756			screen_write_cursormove(&ctx,
757			    len + c->prompt_index - off, 0);
758			if (c->prompt_index < strlen(c->prompt_buffer))
759				ch = c->prompt_buffer[c->prompt_index];
760		}
761		gc.attr ^= GRID_ATTR_REVERSE;
762		screen_write_putc(&ctx, &gc, ch);
763	}
764
765	screen_write_stop(&ctx);
766
767	if (grid_compare(c->status.grid, old_status.grid) == 0) {
768		screen_free(&old_status);
769		return (0);
770	}
771	screen_free(&old_status);
772	return (1);
773}
774
775/* Handle keys in prompt. */
776void
777status_prompt_key(struct client *c, int key)
778{
779	struct paste_buffer	*pb;
780	char   			*s, *first, *last, word[64], swapc;
781	size_t			 size, n, off, idx;
782
783	size = strlen(c->prompt_buffer);
784	switch (mode_key_lookup(&c->prompt_mdata, key)) {
785	case MODEKEYEDIT_CURSORLEFT:
786		if (c->prompt_index > 0) {
787			c->prompt_index--;
788			c->flags |= CLIENT_STATUS;
789		}
790		break;
791	case MODEKEYEDIT_SWITCHMODEAPPEND:
792	case MODEKEYEDIT_CURSORRIGHT:
793		if (c->prompt_index < size) {
794			c->prompt_index++;
795			c->flags |= CLIENT_STATUS;
796		}
797		break;
798	case MODEKEYEDIT_STARTOFLINE:
799		if (c->prompt_index != 0) {
800			c->prompt_index = 0;
801			c->flags |= CLIENT_STATUS;
802		}
803		break;
804	case MODEKEYEDIT_ENDOFLINE:
805		if (c->prompt_index != size) {
806			c->prompt_index = size;
807			c->flags |= CLIENT_STATUS;
808		}
809		break;
810	case MODEKEYEDIT_COMPLETE:
811		if (*c->prompt_buffer == '\0')
812			break;
813
814		idx = c->prompt_index;
815		if (idx != 0)
816			idx--;
817
818		/* Find the word we are in. */
819		first = c->prompt_buffer + idx;
820		while (first > c->prompt_buffer && *first != ' ')
821			first--;
822		while (*first == ' ')
823			first++;
824		last = c->prompt_buffer + idx;
825		while (*last != '\0' && *last != ' ')
826			last++;
827		while (*last == ' ')
828			last--;
829		if (*last != '\0')
830			last++;
831		if (last <= first ||
832		    ((size_t) (last - first)) > (sizeof word) - 1)
833			break;
834		memcpy(word, first, last - first);
835		word[last - first] = '\0';
836
837		/* And try to complete it. */
838		if ((s = status_prompt_complete(word)) == NULL)
839			break;
840
841		/* Trim out word. */
842		n = size - (last - c->prompt_buffer) + 1; /* with \0 */
843		memmove(first, last, n);
844		size -= last - first;
845
846		/* Insert the new word. */
847 		size += strlen(s);
848		off = first - c->prompt_buffer;
849 		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 1);
850		first = c->prompt_buffer + off;
851 		memmove(first + strlen(s), first, n);
852 		memcpy(first, s, strlen(s));
853
854		c->prompt_index = (first - c->prompt_buffer) + strlen(s);
855		xfree(s);
856
857		c->flags |= CLIENT_STATUS;
858		break;
859	case MODEKEYEDIT_BACKSPACE:
860		if (c->prompt_index != 0) {
861			if (c->prompt_index == size)
862				c->prompt_buffer[--c->prompt_index] = '\0';
863			else {
864				memmove(c->prompt_buffer + c->prompt_index - 1,
865				    c->prompt_buffer + c->prompt_index,
866				    size + 1 - c->prompt_index);
867				c->prompt_index--;
868			}
869			c->flags |= CLIENT_STATUS;
870		}
871		break;
872 	case MODEKEYEDIT_DELETE:
873		if (c->prompt_index != size) {
874			memmove(c->prompt_buffer + c->prompt_index,
875			    c->prompt_buffer + c->prompt_index + 1,
876			    size + 1 - c->prompt_index);
877			c->flags |= CLIENT_STATUS;
878		}
879		break;
880	case MODEKEYEDIT_DELETELINE:
881		*c->prompt_buffer = '\0';
882		c->prompt_index = 0;
883		c->flags |= CLIENT_STATUS;
884		break;
885	case MODEKEYEDIT_DELETETOENDOFLINE:
886		if (c->prompt_index < size) {
887			c->prompt_buffer[c->prompt_index] = '\0';
888			c->flags |= CLIENT_STATUS;
889		}
890		break;
891	case MODEKEYEDIT_HISTORYUP:
892		if (server_locked)
893			break;
894
895		if (ARRAY_LENGTH(&c->prompt_hdata) == 0)
896			break;
897		if (c->prompt_flags & PROMPT_HIDDEN)
898			memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
899	       	xfree(c->prompt_buffer);
900
901		c->prompt_buffer = xstrdup(ARRAY_ITEM(&c->prompt_hdata,
902		    ARRAY_LENGTH(&c->prompt_hdata) - 1 - c->prompt_hindex));
903		if (c->prompt_hindex != ARRAY_LENGTH(&c->prompt_hdata) - 1)
904			c->prompt_hindex++;
905
906		c->prompt_index = strlen(c->prompt_buffer);
907		c->flags |= CLIENT_STATUS;
908		break;
909	case MODEKEYEDIT_HISTORYDOWN:
910		if (server_locked)
911			break;
912
913		if (c->prompt_flags & PROMPT_HIDDEN)
914			memset(c->prompt_buffer, 0, strlen(c->prompt_buffer));
915		xfree(c->prompt_buffer);
916
917		if (c->prompt_hindex != 0) {
918			c->prompt_hindex--;
919			c->prompt_buffer = xstrdup(ARRAY_ITEM(
920			    &c->prompt_hdata, ARRAY_LENGTH(
921			    &c->prompt_hdata) - 1 - c->prompt_hindex));
922		} else
923			c->prompt_buffer = xstrdup("");
924
925		c->prompt_index = strlen(c->prompt_buffer);
926		c->flags |= CLIENT_STATUS;
927		break;
928	case MODEKEYEDIT_PASTE:
929		if ((pb = paste_get_top(&c->session->buffers)) == NULL)
930			break;
931		if ((last = strchr(pb->data, '\n')) == NULL)
932			last = strchr(pb->data, '\0');
933		n = last - pb->data;
934
935		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + n + 1);
936		if (c->prompt_index == size) {
937			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
938			c->prompt_index += n;
939			c->prompt_buffer[c->prompt_index] = '\0';
940		} else {
941			memmove(c->prompt_buffer + c->prompt_index + n,
942			    c->prompt_buffer + c->prompt_index,
943			    size + 1 - c->prompt_index);
944			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
945			c->prompt_index += n;
946		}
947
948		c->flags |= CLIENT_STATUS;
949		break;
950	case MODEKEYEDIT_TRANSPOSECHARS:
951		idx = c->prompt_index;
952		if (idx < size)
953			idx++;
954		if (idx >= 2) {
955			swapc = c->prompt_buffer[idx - 2];
956			c->prompt_buffer[idx - 2] = c->prompt_buffer[idx - 1];
957			c->prompt_buffer[idx - 1] = swapc;
958			c->prompt_index = idx;
959			c->flags |= CLIENT_STATUS;
960		}
961		break;
962 	case MODEKEYEDIT_ENTER:
963		if (*c->prompt_buffer != '\0')
964			status_prompt_add_history(c);
965		if (c->prompt_callbackfn(c->prompt_data, c->prompt_buffer) == 0)
966			status_prompt_clear(c);
967		break;
968	case MODEKEYEDIT_CANCEL:
969		if (c->prompt_callbackfn(c->prompt_data, NULL) == 0)
970			status_prompt_clear(c);
971		break;
972	case MODEKEY_OTHER:
973		if (key < 32 || key > 126)
974			break;
975		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 2);
976
977		if (c->prompt_index == size) {
978			c->prompt_buffer[c->prompt_index++] = key;
979			c->prompt_buffer[c->prompt_index] = '\0';
980		} else {
981			memmove(c->prompt_buffer + c->prompt_index + 1,
982			    c->prompt_buffer + c->prompt_index,
983			    size + 1 - c->prompt_index);
984			c->prompt_buffer[c->prompt_index++] = key;
985		}
986
987		if (c->prompt_flags & PROMPT_SINGLE) {
988			if (c->prompt_callbackfn(
989			    c->prompt_data, c->prompt_buffer) == 0)
990				status_prompt_clear(c);
991		}
992
993		c->flags |= CLIENT_STATUS;
994		break;
995	default:
996		break;
997	}
998}
999
1000/* Add line to the history. */
1001void
1002status_prompt_add_history(struct client *c)
1003{
1004	if (server_locked)
1005		return;
1006
1007	if (ARRAY_LENGTH(&c->prompt_hdata) > 0 &&
1008	    strcmp(ARRAY_LAST(&c->prompt_hdata), c->prompt_buffer) == 0)
1009		return;
1010
1011	if (ARRAY_LENGTH(&c->prompt_hdata) == PROMPT_HISTORY) {
1012		xfree(ARRAY_FIRST(&c->prompt_hdata));
1013		ARRAY_REMOVE(&c->prompt_hdata, 0);
1014	}
1015
1016	ARRAY_ADD(&c->prompt_hdata, xstrdup(c->prompt_buffer));
1017}
1018
1019/* Complete word. */
1020char *
1021status_prompt_complete(const char *s)
1022{
1023	const struct cmd_entry 	      **cmdent;
1024	const struct set_option_entry  *optent;
1025	ARRAY_DECL(, const char *)	list;
1026	char			       *prefix, *s2;
1027	u_int				i;
1028	size_t			 	j;
1029
1030	if (*s == '\0')
1031		return (NULL);
1032
1033	/* First, build a list of all the possible matches. */
1034	ARRAY_INIT(&list);
1035	for (cmdent = cmd_table; *cmdent != NULL; cmdent++) {
1036		if (strncmp((*cmdent)->name, s, strlen(s)) == 0)
1037			ARRAY_ADD(&list, (*cmdent)->name);
1038	}
1039	for (optent = set_option_table; optent->name != NULL; optent++) {
1040		if (strncmp(optent->name, s, strlen(s)) == 0)
1041			ARRAY_ADD(&list, optent->name);
1042	}
1043	for (optent = set_window_option_table; optent->name != NULL; optent++) {
1044		if (strncmp(optent->name, s, strlen(s)) == 0)
1045			ARRAY_ADD(&list, optent->name);
1046	}
1047
1048	/* If none, bail now. */
1049	if (ARRAY_LENGTH(&list) == 0) {
1050		ARRAY_FREE(&list);
1051		return (NULL);
1052	}
1053
1054	/* If an exact match, return it, with a trailing space. */
1055	if (ARRAY_LENGTH(&list) == 1) {
1056		xasprintf(&s2, "%s ", ARRAY_FIRST(&list));
1057		ARRAY_FREE(&list);
1058		return (s2);
1059	}
1060
1061	/* Now loop through the list and find the longest common prefix. */
1062	prefix = xstrdup(ARRAY_FIRST(&list));
1063	for (i = 1; i < ARRAY_LENGTH(&list); i++) {
1064		s = ARRAY_ITEM(&list, i);
1065
1066		j = strlen(s);
1067		if (j > strlen(prefix))
1068			j = strlen(prefix);
1069		for (; j > 0; j--) {
1070			if (prefix[j - 1] != s[j - 1])
1071				prefix[j - 1] = '\0';
1072		}
1073	}
1074
1075	ARRAY_FREE(&list);
1076	return (prefix);
1077}
1078