status.c revision 1.114 
1/* $OpenBSD: status.c,v 1.114 2014/04/24 09:14:43 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_redraw_get_left(
33	    struct client *, time_t, int, struct grid_cell *, size_t *);
34char   *status_redraw_get_right(
35	    struct client *, time_t, int, struct grid_cell *, size_t *);
36char   *status_find_job(struct client *, char **);
37void	status_job_free(void *);
38void	status_job_callback(struct job *);
39char   *status_print(
40	    struct client *, struct winlink *, time_t, struct grid_cell *);
41void	status_replace1(struct client *, char **, char **, char *, size_t, int);
42void	status_message_callback(int, short, void *);
43
44const char *status_prompt_up_history(u_int *);
45const char *status_prompt_down_history(u_int *);
46void	status_prompt_add_history(const char *);
47char   *status_prompt_complete(const char *);
48
49/* Status prompt history. */
50ARRAY_DECL(, char *) status_prompt_history = ARRAY_INITIALIZER;
51
52/* Status output tree. */
53RB_GENERATE(status_out_tree, status_out, entry, status_out_cmp);
54
55/* Output tree comparison function. */
56int
57status_out_cmp(struct status_out *so1, struct status_out *so2)
58{
59	return (strcmp(so1->cmd, so2->cmd));
60}
61
62/* Get screen line of status line. -1 means off. */
63int
64status_at_line(struct client *c)
65{
66	struct session	*s = c->session;
67
68	if (!options_get_number(&s->options, "status"))
69		return (-1);
70
71	if (options_get_number(&s->options, "status-position") == 0)
72		return (0);
73	return (c->tty.sy - 1);
74}
75
76/* Retrieve options for left string. */
77char *
78status_redraw_get_left(struct client *c,
79    time_t t, int utf8flag, struct grid_cell *gc, size_t *size)
80{
81	struct session	*s = c->session;
82	char		*left;
83	size_t		 leftlen;
84
85	style_apply_update(gc, &s->options, "status-left-style");
86
87	left = status_replace(c, NULL,
88	    NULL, NULL, options_get_string(&s->options, "status-left"), t, 1);
89
90	*size = options_get_number(&s->options, "status-left-length");
91	leftlen = screen_write_cstrlen(utf8flag, "%s", left);
92	if (leftlen < *size)
93		*size = leftlen;
94	return (left);
95}
96
97/* Retrieve options for right string. */
98char *
99status_redraw_get_right(struct client *c,
100    time_t t, int utf8flag, struct grid_cell *gc, size_t *size)
101{
102	struct session	*s = c->session;
103	char		*right;
104	size_t		 rightlen;
105
106	style_apply_update(gc, &s->options, "status-right-style");
107
108	right = status_replace(c, NULL,
109	    NULL, NULL, options_get_string(&s->options, "status-right"), t, 1);
110
111	*size = options_get_number(&s->options, "status-right-length");
112	rightlen = screen_write_cstrlen(utf8flag, "%s", right);
113	if (rightlen < *size)
114		*size = rightlen;
115	return (right);
116}
117
118/* Set window at window list position. */
119void
120status_set_window_at(struct client *c, u_int x)
121{
122	struct session	*s = c->session;
123	struct winlink	*wl;
124
125	x += c->wlmouse;
126	RB_FOREACH(wl, winlinks, &s->windows) {
127		if (x < wl->status_width && session_select(s, wl->idx) == 0)
128			server_redraw_session(s);
129		x -= wl->status_width + 1;
130	}
131}
132
133/* Draw status for client on the last lines of given context. */
134int
135status_redraw(struct client *c)
136{
137	struct screen_write_ctx	ctx;
138	struct session	       *s = c->session;
139	struct winlink	       *wl;
140	struct screen		old_status, window_list;
141	struct grid_cell	stdgc, lgc, rgc, gc;
142	struct options	       *oo;
143	time_t			t;
144	char		       *left, *right, *sep;
145	u_int			offset, needed;
146	u_int			wlstart, wlwidth, wlavailable, wloffset, wlsize;
147	size_t			llen, rlen, seplen;
148	int			larrow, rarrow, utf8flag;
149
150	/* No status line? */
151	if (c->tty.sy == 0 || !options_get_number(&s->options, "status"))
152		return (1);
153	left = right = NULL;
154	larrow = rarrow = 0;
155
156	/* Update status timer. */
157	if (gettimeofday(&c->status_timer, NULL) != 0)
158		fatal("gettimeofday failed");
159	t = c->status_timer.tv_sec;
160
161	/* Set up default colour. */
162	style_apply(&stdgc, &s->options, "status-style");
163
164	/* Create the target screen. */
165	memcpy(&old_status, &c->status, sizeof old_status);
166	screen_init(&c->status, c->tty.sx, 1, 0);
167	screen_write_start(&ctx, NULL, &c->status);
168	for (offset = 0; offset < c->tty.sx; offset++)
169		screen_write_putc(&ctx, &stdgc, ' ');
170	screen_write_stop(&ctx);
171
172	/* If the height is one line, blank status line. */
173	if (c->tty.sy <= 1)
174		goto out;
175
176	/* Get UTF-8 flag. */
177	utf8flag = options_get_number(&s->options, "status-utf8");
178
179	/* Work out left and right strings. */
180	memcpy(&lgc, &stdgc, sizeof lgc);
181	left = status_redraw_get_left(c, t, utf8flag, &lgc, &llen);
182	memcpy(&rgc, &stdgc, sizeof rgc);
183	right = status_redraw_get_right(c, t, utf8flag, &rgc, &rlen);
184
185	/*
186	 * Figure out how much space we have for the window list. If there
187	 * isn't enough space, just show a blank status line.
188	 */
189	needed = 0;
190	if (llen != 0)
191		needed += llen + 1;
192	if (rlen != 0)
193		needed += rlen + 1;
194	if (c->tty.sx == 0 || c->tty.sx <= needed)
195		goto out;
196	wlavailable = c->tty.sx - needed;
197
198	/* Calculate the total size needed for the window list. */
199	wlstart = wloffset = wlwidth = 0;
200	RB_FOREACH(wl, winlinks, &s->windows) {
201		free(wl->status_text);
202		memcpy(&wl->status_cell, &stdgc, sizeof wl->status_cell);
203		wl->status_text = status_print(c, wl, t, &wl->status_cell);
204		wl->status_width =
205		    screen_write_cstrlen(utf8flag, "%s", wl->status_text);
206
207		if (wl == s->curw)
208			wloffset = wlwidth;
209
210		oo = &wl->window->options;
211		sep = options_get_string(oo, "window-status-separator");
212		seplen = screen_write_strlen(utf8flag, "%s", sep);
213		wlwidth += wl->status_width + seplen;
214	}
215
216	/* Create a new screen for the window list. */
217	screen_init(&window_list, wlwidth, 1, 0);
218
219	/* And draw the window list into it. */
220	screen_write_start(&ctx, NULL, &window_list);
221	RB_FOREACH(wl, winlinks, &s->windows) {
222		screen_write_cnputs(&ctx,
223		    -1, &wl->status_cell, utf8flag, "%s", wl->status_text);
224
225		oo = &wl->window->options;
226		sep = options_get_string(oo, "window-status-separator");
227		screen_write_nputs(&ctx, -1, &stdgc, utf8flag, "%s", sep);
228	}
229	screen_write_stop(&ctx);
230
231	/* If there is enough space for the total width, skip to draw now. */
232	if (wlwidth <= wlavailable)
233		goto draw;
234
235	/* Find size of current window text. */
236	wlsize = s->curw->status_width;
237
238	/*
239	 * If the current window is already on screen, good to draw from the
240	 * start and just leave off the end.
241	 */
242	if (wloffset + wlsize < wlavailable) {
243		if (wlavailable > 0) {
244			rarrow = 1;
245			wlavailable--;
246		}
247		wlwidth = wlavailable;
248	} else {
249		/*
250		 * Work out how many characters we need to omit from the
251		 * start. There are wlavailable characters to fill, and
252		 * wloffset + wlsize must be the last. So, the start character
253		 * is wloffset + wlsize - wlavailable.
254		 */
255		if (wlavailable > 0) {
256			larrow = 1;
257			wlavailable--;
258		}
259
260		wlstart = wloffset + wlsize - wlavailable;
261		if (wlavailable > 0 && wlwidth > wlstart + wlavailable + 1) {
262			rarrow = 1;
263			wlstart++;
264			wlavailable--;
265		}
266		wlwidth = wlavailable;
267	}
268
269	/* Bail if anything is now too small too. */
270	if (wlwidth == 0 || wlavailable == 0) {
271		screen_free(&window_list);
272		goto out;
273	}
274
275	/*
276	 * Now the start position is known, work out the state of the left and
277	 * right arrows.
278	 */
279	offset = 0;
280	RB_FOREACH(wl, winlinks, &s->windows) {
281		if (wl->flags & WINLINK_ALERTFLAGS &&
282		    larrow == 1 && offset < wlstart)
283			larrow = -1;
284
285		offset += wl->status_width;
286
287		if (wl->flags & WINLINK_ALERTFLAGS &&
288		    rarrow == 1 && offset > wlstart + wlwidth)
289			rarrow = -1;
290	}
291
292draw:
293	/* Begin drawing. */
294	screen_write_start(&ctx, NULL, &c->status);
295
296	/* Draw the left string and arrow. */
297	screen_write_cursormove(&ctx, 0, 0);
298	if (llen != 0) {
299		screen_write_cnputs(&ctx, llen, &lgc, utf8flag, "%s", left);
300		screen_write_putc(&ctx, &stdgc, ' ');
301	}
302	if (larrow != 0) {
303		memcpy(&gc, &stdgc, sizeof gc);
304		if (larrow == -1)
305			gc.attr ^= GRID_ATTR_REVERSE;
306		screen_write_putc(&ctx, &gc, '<');
307	}
308
309	/* Draw the right string and arrow. */
310	if (rarrow != 0) {
311		screen_write_cursormove(&ctx, c->tty.sx - rlen - 2, 0);
312		memcpy(&gc, &stdgc, sizeof gc);
313		if (rarrow == -1)
314			gc.attr ^= GRID_ATTR_REVERSE;
315		screen_write_putc(&ctx, &gc, '>');
316	} else
317		screen_write_cursormove(&ctx, c->tty.sx - rlen - 1, 0);
318	if (rlen != 0) {
319		screen_write_putc(&ctx, &stdgc, ' ');
320		screen_write_cnputs(&ctx, rlen, &rgc, utf8flag, "%s", right);
321	}
322
323	/* Figure out the offset for the window list. */
324	if (llen != 0)
325		wloffset = llen + 1;
326	else
327		wloffset = 0;
328	if (wlwidth < wlavailable) {
329		switch (options_get_number(&s->options, "status-justify")) {
330		case 1:	/* centered */
331			wloffset += (wlavailable - wlwidth) / 2;
332			break;
333		case 2:	/* right */
334			wloffset += (wlavailable - wlwidth);
335			break;
336		}
337	}
338	if (larrow != 0)
339		wloffset++;
340
341	/* Copy the window list. */
342	c->wlmouse = -wloffset + wlstart;
343	screen_write_cursormove(&ctx, wloffset, 0);
344	screen_write_copy(&ctx, &window_list, wlstart, 0, wlwidth, 1);
345	screen_free(&window_list);
346
347	screen_write_stop(&ctx);
348
349out:
350	free(left);
351	free(right);
352
353	if (grid_compare(c->status.grid, old_status.grid) == 0) {
354		screen_free(&old_status);
355		return (0);
356	}
357	screen_free(&old_status);
358	return (1);
359}
360
361/* Replace a single special sequence (prefixed by #). */
362void
363status_replace1(struct client *c, char **iptr, char **optr, char *out,
364    size_t outsize, int jobsflag)
365{
366	char	ch, tmp[256], *ptr, *endptr;
367	size_t	ptrlen;
368	long	limit;
369
370	errno = 0;
371	limit = strtol(*iptr, &endptr, 10);
372	if ((limit == 0 && errno != EINVAL) ||
373	    (limit == LONG_MIN && errno != ERANGE) ||
374	    (limit == LONG_MAX && errno != ERANGE) ||
375	    limit != 0)
376		*iptr = endptr;
377	if (limit <= 0)
378		limit = LONG_MAX;
379
380	switch (*(*iptr)++) {
381	case '(':
382		if (!jobsflag) {
383			ch = ')';
384			goto skip_to;
385		}
386		if ((ptr = status_find_job(c, iptr)) == NULL)
387			return;
388		goto do_replace;
389	case '[':
390		/*
391		 * Embedded style, handled at display time. Leave present and
392		 * skip input until ].
393		 */
394		ch = ']';
395		goto skip_to;
396	case '{':
397		ptr = (char *) "#{";
398		goto do_replace;
399	default:
400		xsnprintf(tmp, sizeof tmp, "#%c", *(*iptr - 1));
401		ptr = tmp;
402		goto do_replace;
403	}
404
405	return;
406
407do_replace:
408	ptrlen = strlen(ptr);
409	if ((size_t) limit < ptrlen)
410		ptrlen = limit;
411
412	if (*optr + ptrlen >= out + outsize - 1)
413		return;
414	while (ptrlen > 0 && *ptr != '\0') {
415		*(*optr)++ = *ptr++;
416		ptrlen--;
417	}
418
419	return;
420
421skip_to:
422	*(*optr)++ = '#';
423
424	(*iptr)--;	/* include ch */
425	while (**iptr != ch && **iptr != '\0') {
426		if (*optr >=  out + outsize - 1)
427			break;
428		*(*optr)++ = *(*iptr)++;
429	}
430}
431
432/* Replace special sequences in fmt. */
433char *
434status_replace(struct client *c, struct session *s, struct winlink *wl,
435    struct window_pane *wp, const char *fmt, time_t t, int jobsflag)
436{
437	static char		 out[BUFSIZ];
438	char			 in[BUFSIZ], ch, *iptr, *optr, *expanded;
439	size_t			 len;
440	struct format_tree	*ft;
441
442	if (fmt == NULL)
443		return (xstrdup(""));
444
445	if (s == NULL && c != NULL)
446		s = c->session;
447	if (wl == NULL && s != NULL)
448		wl = s->curw;
449	if (wp == NULL && wl != NULL)
450		wp = wl->window->active;
451
452	len = strftime(in, sizeof in, fmt, localtime(&t));
453	in[len] = '\0';
454
455	iptr = in;
456	optr = out;
457
458	while (*iptr != '\0') {
459		if (optr >= out + (sizeof out) - 1)
460			break;
461		ch = *iptr++;
462
463		if (ch != '#' || *iptr == '\0') {
464			*optr++ = ch;
465			continue;
466		}
467		status_replace1(c, &iptr, &optr, out, sizeof out, jobsflag);
468	}
469	*optr = '\0';
470
471	ft = format_create();
472	if (c != NULL)
473		format_client(ft, c);
474	if (s != NULL)
475		format_session(ft, s);
476	if (s != NULL && wl != NULL)
477		format_winlink(ft, s, wl);
478	if (wp != NULL)
479		format_window_pane(ft, wp);
480	expanded = format_expand(ft, out);
481	format_free(ft);
482	return (expanded);
483}
484
485/* Figure out job name and get its result, starting it off if necessary. */
486char *
487status_find_job(struct client *c, char **iptr)
488{
489	struct status_out	*so, so_find;
490	char   			*cmd;
491	int			 lastesc;
492	size_t			 len;
493
494	if (**iptr == '\0')
495		return (NULL);
496	if (**iptr == ')') {		/* no command given */
497		(*iptr)++;
498		return (NULL);
499	}
500
501	cmd = xmalloc(strlen(*iptr) + 1);
502	len = 0;
503
504	lastesc = 0;
505	for (; **iptr != '\0'; (*iptr)++) {
506		if (!lastesc && **iptr == ')')
507			break;		/* unescaped ) is the end */
508		if (!lastesc && **iptr == '\\') {
509			lastesc = 1;
510			continue;	/* skip \ if not escaped */
511		}
512		lastesc = 0;
513		cmd[len++] = **iptr;
514	}
515	if (**iptr == '\0')		/* no terminating ) */ {
516		free(cmd);
517		return (NULL);
518	}
519	(*iptr)++;			/* skip final ) */
520	cmd[len] = '\0';
521
522	/* First try in the new tree. */
523	so_find.cmd = cmd;
524	so = RB_FIND(status_out_tree, &c->status_new, &so_find);
525	if (so != NULL && so->out != NULL) {
526		free(cmd);
527		return (so->out);
528	}
529
530	/* If not found at all, start the job and add to the tree. */
531	if (so == NULL) {
532		job_run(cmd, NULL, status_job_callback, status_job_free, c);
533		c->references++;
534
535		so = xmalloc(sizeof *so);
536		so->cmd = xstrdup(cmd);
537		so->out = NULL;
538		RB_INSERT(status_out_tree, &c->status_new, so);
539	}
540
541	/* Lookup in the old tree. */
542	so_find.cmd = cmd;
543	so = RB_FIND(status_out_tree, &c->status_old, &so_find);
544	free(cmd);
545	if (so != NULL)
546		return (so->out);
547	return (NULL);
548}
549
550/* Free job tree. */
551void
552status_free_jobs(struct status_out_tree *sotree)
553{
554	struct status_out	*so, *so_next;
555
556	so_next = RB_MIN(status_out_tree, sotree);
557	while (so_next != NULL) {
558		so = so_next;
559		so_next = RB_NEXT(status_out_tree, sotree, so);
560
561		RB_REMOVE(status_out_tree, sotree, so);
562		free(so->out);
563		free(so->cmd);
564		free(so);
565	}
566}
567
568/* Update jobs on status interval. */
569void
570status_update_jobs(struct client *c)
571{
572	/* Free the old tree. */
573	status_free_jobs(&c->status_old);
574
575	/* Move the new to old. */
576	memcpy(&c->status_old, &c->status_new, sizeof c->status_old);
577	RB_INIT(&c->status_new);
578}
579
580/* Free status job. */
581void
582status_job_free(void *data)
583{
584	struct client	*c = data;
585
586	c->references--;
587}
588
589/* Job has finished: save its result. */
590void
591status_job_callback(struct job *job)
592{
593	struct client		*c = job->data;
594	struct status_out	*so, so_find;
595	char			*line, *buf;
596	size_t			 len;
597
598	if (c->flags & CLIENT_DEAD)
599		return;
600
601	so_find.cmd = job->cmd;
602	so = RB_FIND(status_out_tree, &c->status_new, &so_find);
603	if (so == NULL || so->out != NULL)
604		return;
605
606	buf = NULL;
607	if ((line = evbuffer_readline(job->event->input)) == NULL) {
608		len = EVBUFFER_LENGTH(job->event->input);
609		buf = xmalloc(len + 1);
610		if (len != 0)
611			memcpy(buf, EVBUFFER_DATA(job->event->input), len);
612		buf[len] = '\0';
613	} else
614		buf = line;
615
616	so->out = buf;
617	server_status_client(c);
618}
619
620/* Return winlink status line entry and adjust gc as necessary. */
621char *
622status_print(
623    struct client *c, struct winlink *wl, time_t t, struct grid_cell *gc)
624{
625	struct options	*oo = &wl->window->options;
626	struct session	*s = c->session;
627	const char	*fmt;
628	char   		*text;
629
630	style_apply_update(gc, oo, "window-status-style");
631	fmt = options_get_string(oo, "window-status-format");
632	if (wl == s->curw) {
633		style_apply_update(gc, oo, "window-status-current-style");
634		fmt = options_get_string(oo, "window-status-current-format");
635	}
636	if (wl == TAILQ_FIRST(&s->lastw))
637		style_apply_update(gc, oo, "window-status-last-style");
638
639	if (wl->flags & WINLINK_BELL)
640		style_apply_update(gc, oo, "window-status-bell-style");
641	else if (wl->flags & (WINLINK_ACTIVITY|WINLINK_SILENCE))
642		style_apply_update(gc, oo, "window-status-activity-style");
643
644	text = status_replace(c, NULL, wl, NULL, fmt, t, 1);
645	return (text);
646}
647
648/* Set a status line message. */
649void printflike2
650status_message_set(struct client *c, const char *fmt, ...)
651{
652	struct timeval		 tv;
653	struct message_entry	*msg;
654	va_list			 ap;
655	int			 delay;
656	u_int			 i, limit;
657
658	status_prompt_clear(c);
659	status_message_clear(c);
660
661	va_start(ap, fmt);
662	xvasprintf(&c->message_string, fmt, ap);
663	va_end(ap);
664
665	ARRAY_EXPAND(&c->message_log, 1);
666	msg = &ARRAY_LAST(&c->message_log);
667	msg->msg_time = time(NULL);
668	msg->msg = xstrdup(c->message_string);
669
670	limit = options_get_number(&global_options, "message-limit");
671	if (ARRAY_LENGTH(&c->message_log) > limit) {
672		limit = ARRAY_LENGTH(&c->message_log) - limit;
673		for (i = 0; i < limit; i++) {
674			msg = &ARRAY_FIRST(&c->message_log);
675			free(msg->msg);
676			ARRAY_REMOVE(&c->message_log, 0);
677		}
678	}
679
680	delay = options_get_number(&c->session->options, "display-time");
681	tv.tv_sec = delay / 1000;
682	tv.tv_usec = (delay % 1000) * 1000L;
683
684	if (event_initialized(&c->message_timer))
685		evtimer_del(&c->message_timer);
686	evtimer_set(&c->message_timer, status_message_callback, c);
687	evtimer_add(&c->message_timer, &tv);
688
689	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
690	c->flags |= CLIENT_STATUS;
691}
692
693/* Clear status line message. */
694void
695status_message_clear(struct client *c)
696{
697	if (c->message_string == NULL)
698		return;
699
700	free(c->message_string);
701	c->message_string = NULL;
702
703	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
704	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
705
706	screen_reinit(&c->status);
707}
708
709/* Clear status line message after timer expires. */
710void
711status_message_callback(unused int fd, unused short event, void *data)
712{
713	struct client	*c = data;
714
715	status_message_clear(c);
716}
717
718/* Draw client message on status line of present else on last line. */
719int
720status_message_redraw(struct client *c)
721{
722	struct screen_write_ctx		ctx;
723	struct session		       *s = c->session;
724	struct screen		        old_status;
725	size_t			        len;
726	struct grid_cell		gc;
727	int				utf8flag;
728
729	if (c->tty.sx == 0 || c->tty.sy == 0)
730		return (0);
731	memcpy(&old_status, &c->status, sizeof old_status);
732	screen_init(&c->status, c->tty.sx, 1, 0);
733
734	utf8flag = options_get_number(&s->options, "status-utf8");
735
736	len = screen_write_strlen(utf8flag, "%s", c->message_string);
737	if (len > c->tty.sx)
738		len = c->tty.sx;
739
740	style_apply(&gc, &s->options, "message-style");
741
742	screen_write_start(&ctx, NULL, &c->status);
743
744	screen_write_cursormove(&ctx, 0, 0);
745	screen_write_nputs(&ctx, len, &gc, utf8flag, "%s", c->message_string);
746	for (; len < c->tty.sx; len++)
747		screen_write_putc(&ctx, &gc, ' ');
748
749	screen_write_stop(&ctx);
750
751	if (grid_compare(c->status.grid, old_status.grid) == 0) {
752		screen_free(&old_status);
753		return (0);
754	}
755	screen_free(&old_status);
756	return (1);
757}
758
759/* Enable status line prompt. */
760void
761status_prompt_set(struct client *c, const char *msg, const char *input,
762    int (*callbackfn)(void *, const char *), void (*freefn)(void *),
763    void *data, int flags)
764{
765	int	keys;
766
767	status_message_clear(c);
768	status_prompt_clear(c);
769
770	c->prompt_string = status_replace(c, NULL, NULL, NULL, msg,
771	    time(NULL), 0);
772
773	c->prompt_buffer = status_replace(c, NULL, NULL, NULL, input,
774	    time(NULL), 0);
775	c->prompt_index = strlen(c->prompt_buffer);
776
777	c->prompt_callbackfn = callbackfn;
778	c->prompt_freefn = freefn;
779	c->prompt_data = data;
780
781	c->prompt_hindex = 0;
782
783	c->prompt_flags = flags;
784
785	keys = options_get_number(&c->session->options, "status-keys");
786	if (keys == MODEKEY_EMACS)
787		mode_key_init(&c->prompt_mdata, &mode_key_tree_emacs_edit);
788	else
789		mode_key_init(&c->prompt_mdata, &mode_key_tree_vi_edit);
790
791	c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE);
792	c->flags |= CLIENT_STATUS;
793}
794
795/* Remove status line prompt. */
796void
797status_prompt_clear(struct client *c)
798{
799	if (c->prompt_string == NULL)
800		return;
801
802	if (c->prompt_freefn != NULL && c->prompt_data != NULL)
803		c->prompt_freefn(c->prompt_data);
804
805	free(c->prompt_string);
806	c->prompt_string = NULL;
807
808	free(c->prompt_buffer);
809	c->prompt_buffer = NULL;
810
811	c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE);
812	c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */
813
814	screen_reinit(&c->status);
815}
816
817/* Update status line prompt with a new prompt string. */
818void
819status_prompt_update(struct client *c, const char *msg, const char *input)
820{
821	free(c->prompt_string);
822	c->prompt_string = status_replace(c, NULL, NULL, NULL, msg,
823	    time(NULL), 0);
824
825	free(c->prompt_buffer);
826	c->prompt_buffer = status_replace(c, NULL, NULL, NULL, input,
827	    time(NULL), 0);
828	c->prompt_index = strlen(c->prompt_buffer);
829
830	c->prompt_hindex = 0;
831
832	c->flags |= CLIENT_STATUS;
833}
834
835/* Draw client prompt on status line of present else on last line. */
836int
837status_prompt_redraw(struct client *c)
838{
839	struct screen_write_ctx		ctx;
840	struct session		       *s = c->session;
841	struct screen		        old_status;
842	size_t			        i, size, left, len, off;
843	struct grid_cell		gc, *gcp;
844	int				utf8flag;
845
846	if (c->tty.sx == 0 || c->tty.sy == 0)
847		return (0);
848	memcpy(&old_status, &c->status, sizeof old_status);
849	screen_init(&c->status, c->tty.sx, 1, 0);
850
851	utf8flag = options_get_number(&s->options, "status-utf8");
852
853	len = screen_write_strlen(utf8flag, "%s", c->prompt_string);
854	if (len > c->tty.sx)
855		len = c->tty.sx;
856	off = 0;
857
858	/* Change colours for command mode. */
859	if (c->prompt_mdata.mode == 1)
860		style_apply(&gc, &s->options, "message-command-style");
861	else
862		style_apply(&gc, &s->options, "message-style");
863
864	screen_write_start(&ctx, NULL, &c->status);
865
866	screen_write_cursormove(&ctx, 0, 0);
867	screen_write_nputs(&ctx, len, &gc, utf8flag, "%s", c->prompt_string);
868
869	left = c->tty.sx - len;
870	if (left != 0) {
871		size = screen_write_strlen(utf8flag, "%s", c->prompt_buffer);
872		if (c->prompt_index >= left) {
873			off = c->prompt_index - left + 1;
874			if (c->prompt_index == size)
875				left--;
876			size = left;
877		}
878		screen_write_nputs(
879		    &ctx, left, &gc, utf8flag, "%s", c->prompt_buffer + off);
880
881		for (i = len + size; i < c->tty.sx; i++)
882			screen_write_putc(&ctx, &gc, ' ');
883	}
884
885	screen_write_stop(&ctx);
886
887	/* Apply fake cursor. */
888	off = len + c->prompt_index - off;
889	gcp = grid_view_get_cell(c->status.grid, off, 0);
890	gcp->attr ^= GRID_ATTR_REVERSE;
891
892	if (grid_compare(c->status.grid, old_status.grid) == 0) {
893		screen_free(&old_status);
894		return (0);
895	}
896	screen_free(&old_status);
897	return (1);
898}
899
900/* Handle keys in prompt. */
901void
902status_prompt_key(struct client *c, int key)
903{
904	struct session		*sess = c->session;
905	struct options		*oo = &sess->options;
906	struct paste_buffer	*pb;
907	char			*s, *first, *last, word[64], swapc;
908	const char		*histstr;
909	const char		*wsep = NULL;
910	u_char			 ch;
911	size_t			 size, n, off, idx;
912
913	size = strlen(c->prompt_buffer);
914	switch (mode_key_lookup(&c->prompt_mdata, key, NULL)) {
915	case MODEKEYEDIT_CURSORLEFT:
916		if (c->prompt_index > 0) {
917			c->prompt_index--;
918			c->flags |= CLIENT_STATUS;
919		}
920		break;
921	case MODEKEYEDIT_SWITCHMODE:
922		c->flags |= CLIENT_STATUS;
923		break;
924	case MODEKEYEDIT_SWITCHMODEAPPEND:
925		c->flags |= CLIENT_STATUS;
926		/* FALLTHROUGH */
927	case MODEKEYEDIT_CURSORRIGHT:
928		if (c->prompt_index < size) {
929			c->prompt_index++;
930			c->flags |= CLIENT_STATUS;
931		}
932		break;
933	case MODEKEYEDIT_SWITCHMODEBEGINLINE:
934		c->flags |= CLIENT_STATUS;
935		/* FALLTHROUGH */
936	case MODEKEYEDIT_STARTOFLINE:
937		if (c->prompt_index != 0) {
938			c->prompt_index = 0;
939			c->flags |= CLIENT_STATUS;
940		}
941		break;
942	case MODEKEYEDIT_SWITCHMODEAPPENDLINE:
943		c->flags |= CLIENT_STATUS;
944		/* FALLTHROUGH */
945	case MODEKEYEDIT_ENDOFLINE:
946		if (c->prompt_index != size) {
947			c->prompt_index = size;
948			c->flags |= CLIENT_STATUS;
949		}
950		break;
951	case MODEKEYEDIT_COMPLETE:
952		if (*c->prompt_buffer == '\0')
953			break;
954
955		idx = c->prompt_index;
956		if (idx != 0)
957			idx--;
958
959		/* Find the word we are in. */
960		first = c->prompt_buffer + idx;
961		while (first > c->prompt_buffer && *first != ' ')
962			first--;
963		while (*first == ' ')
964			first++;
965		last = c->prompt_buffer + idx;
966		while (*last != '\0' && *last != ' ')
967			last++;
968		while (*last == ' ')
969			last--;
970		if (*last != '\0')
971			last++;
972		if (last <= first ||
973		    ((size_t) (last - first)) > (sizeof word) - 1)
974			break;
975		memcpy(word, first, last - first);
976		word[last - first] = '\0';
977
978		/* And try to complete it. */
979		if ((s = status_prompt_complete(word)) == NULL)
980			break;
981
982		/* Trim out word. */
983		n = size - (last - c->prompt_buffer) + 1; /* with \0 */
984		memmove(first, last, n);
985		size -= last - first;
986
987		/* Insert the new word. */
988		size += strlen(s);
989		off = first - c->prompt_buffer;
990		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 1);
991		first = c->prompt_buffer + off;
992		memmove(first + strlen(s), first, n);
993		memcpy(first, s, strlen(s));
994
995		c->prompt_index = (first - c->prompt_buffer) + strlen(s);
996		free(s);
997
998		c->flags |= CLIENT_STATUS;
999		break;
1000	case MODEKEYEDIT_BACKSPACE:
1001		if (c->prompt_index != 0) {
1002			if (c->prompt_index == size)
1003				c->prompt_buffer[--c->prompt_index] = '\0';
1004			else {
1005				memmove(c->prompt_buffer + c->prompt_index - 1,
1006				    c->prompt_buffer + c->prompt_index,
1007				    size + 1 - c->prompt_index);
1008				c->prompt_index--;
1009			}
1010			c->flags |= CLIENT_STATUS;
1011		}
1012		break;
1013	case MODEKEYEDIT_DELETE:
1014	case MODEKEYEDIT_SWITCHMODESUBSTITUTE:
1015		if (c->prompt_index != size) {
1016			memmove(c->prompt_buffer + c->prompt_index,
1017			    c->prompt_buffer + c->prompt_index + 1,
1018			    size + 1 - c->prompt_index);
1019			c->flags |= CLIENT_STATUS;
1020		}
1021		break;
1022	case MODEKEYEDIT_DELETELINE:
1023	case MODEKEYEDIT_SWITCHMODESUBSTITUTELINE:
1024		*c->prompt_buffer = '\0';
1025		c->prompt_index = 0;
1026		c->flags |= CLIENT_STATUS;
1027		break;
1028	case MODEKEYEDIT_DELETETOENDOFLINE:
1029	case MODEKEYEDIT_SWITCHMODECHANGELINE:
1030		if (c->prompt_index < size) {
1031			c->prompt_buffer[c->prompt_index] = '\0';
1032			c->flags |= CLIENT_STATUS;
1033		}
1034		break;
1035	case MODEKEYEDIT_DELETEWORD:
1036		wsep = options_get_string(oo, "word-separators");
1037		idx = c->prompt_index;
1038
1039		/* Find a non-separator. */
1040		while (idx != 0) {
1041			idx--;
1042			if (!strchr(wsep, c->prompt_buffer[idx]))
1043				break;
1044		}
1045
1046		/* Find the separator at the beginning of the word. */
1047		while (idx != 0) {
1048			idx--;
1049			if (strchr(wsep, c->prompt_buffer[idx])) {
1050				/* Go back to the word. */
1051				idx++;
1052				break;
1053			}
1054		}
1055
1056		memmove(c->prompt_buffer + idx,
1057		    c->prompt_buffer + c->prompt_index,
1058		    size + 1 - c->prompt_index);
1059		memset(c->prompt_buffer + size - (c->prompt_index - idx),
1060		    '\0', c->prompt_index - idx);
1061		c->prompt_index = idx;
1062		c->flags |= CLIENT_STATUS;
1063		break;
1064	case MODEKEYEDIT_NEXTSPACE:
1065		wsep = " ";
1066		/* FALLTHROUGH */
1067	case MODEKEYEDIT_NEXTWORD:
1068		if (wsep == NULL)
1069			wsep = options_get_string(oo, "word-separators");
1070
1071		/* Find a separator. */
1072		while (c->prompt_index != size) {
1073			c->prompt_index++;
1074			if (strchr(wsep, c->prompt_buffer[c->prompt_index]))
1075				break;
1076		}
1077
1078		/* Find the word right after the separation. */
1079		while (c->prompt_index != size) {
1080			c->prompt_index++;
1081			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
1082				break;
1083		}
1084
1085		c->flags |= CLIENT_STATUS;
1086		break;
1087	case MODEKEYEDIT_NEXTSPACEEND:
1088		wsep = " ";
1089		/* FALLTHROUGH */
1090	case MODEKEYEDIT_NEXTWORDEND:
1091		if (wsep == NULL)
1092			wsep = options_get_string(oo, "word-separators");
1093
1094		/* Find a word. */
1095		while (c->prompt_index != size) {
1096			c->prompt_index++;
1097			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
1098				break;
1099		}
1100
1101		/* Find the separator at the end of the word. */
1102		while (c->prompt_index != size) {
1103			c->prompt_index++;
1104			if (strchr(wsep, c->prompt_buffer[c->prompt_index]))
1105				break;
1106		}
1107
1108		/* Back up to the end-of-word like vi. */
1109		if (options_get_number(oo, "status-keys") == MODEKEY_VI &&
1110		    c->prompt_index != 0)
1111			c->prompt_index--;
1112
1113		c->flags |= CLIENT_STATUS;
1114		break;
1115	case MODEKEYEDIT_PREVIOUSSPACE:
1116		wsep = " ";
1117		/* FALLTHROUGH */
1118	case MODEKEYEDIT_PREVIOUSWORD:
1119		if (wsep == NULL)
1120			wsep = options_get_string(oo, "word-separators");
1121
1122		/* Find a non-separator. */
1123		while (c->prompt_index != 0) {
1124			c->prompt_index--;
1125			if (!strchr(wsep, c->prompt_buffer[c->prompt_index]))
1126				break;
1127		}
1128
1129		/* Find the separator at the beginning of the word. */
1130		while (c->prompt_index != 0) {
1131			c->prompt_index--;
1132			if (strchr(wsep, c->prompt_buffer[c->prompt_index])) {
1133				/* Go back to the word. */
1134				c->prompt_index++;
1135				break;
1136			}
1137		}
1138
1139		c->flags |= CLIENT_STATUS;
1140		break;
1141	case MODEKEYEDIT_HISTORYUP:
1142		histstr = status_prompt_up_history(&c->prompt_hindex);
1143		if (histstr == NULL)
1144			break;
1145		free(c->prompt_buffer);
1146		c->prompt_buffer = xstrdup(histstr);
1147		c->prompt_index = strlen(c->prompt_buffer);
1148		c->flags |= CLIENT_STATUS;
1149		break;
1150	case MODEKEYEDIT_HISTORYDOWN:
1151		histstr = status_prompt_down_history(&c->prompt_hindex);
1152		if (histstr == NULL)
1153			break;
1154		free(c->prompt_buffer);
1155		c->prompt_buffer = xstrdup(histstr);
1156		c->prompt_index = strlen(c->prompt_buffer);
1157		c->flags |= CLIENT_STATUS;
1158		break;
1159	case MODEKEYEDIT_PASTE:
1160		if ((pb = paste_get_top()) == NULL)
1161			break;
1162		for (n = 0; n < pb->size; n++) {
1163			ch = (u_char) pb->data[n];
1164			if (ch < 32 || ch == 127)
1165				break;
1166		}
1167
1168		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + n + 1);
1169		if (c->prompt_index == size) {
1170			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
1171			c->prompt_index += n;
1172			c->prompt_buffer[c->prompt_index] = '\0';
1173		} else {
1174			memmove(c->prompt_buffer + c->prompt_index + n,
1175			    c->prompt_buffer + c->prompt_index,
1176			    size + 1 - c->prompt_index);
1177			memcpy(c->prompt_buffer + c->prompt_index, pb->data, n);
1178			c->prompt_index += n;
1179		}
1180
1181		c->flags |= CLIENT_STATUS;
1182		break;
1183	case MODEKEYEDIT_TRANSPOSECHARS:
1184		idx = c->prompt_index;
1185		if (idx < size)
1186			idx++;
1187		if (idx >= 2) {
1188			swapc = c->prompt_buffer[idx - 2];
1189			c->prompt_buffer[idx - 2] = c->prompt_buffer[idx - 1];
1190			c->prompt_buffer[idx - 1] = swapc;
1191			c->prompt_index = idx;
1192			c->flags |= CLIENT_STATUS;
1193		}
1194		break;
1195	case MODEKEYEDIT_ENTER:
1196		if (*c->prompt_buffer != '\0')
1197			status_prompt_add_history(c->prompt_buffer);
1198		if (c->prompt_callbackfn(c->prompt_data, c->prompt_buffer) == 0)
1199			status_prompt_clear(c);
1200		break;
1201	case MODEKEYEDIT_CANCEL:
1202		if (c->prompt_callbackfn(c->prompt_data, NULL) == 0)
1203			status_prompt_clear(c);
1204		break;
1205	case MODEKEY_OTHER:
1206		if ((key & 0xff00) != 0 || key < 32 || key == 127)
1207			break;
1208		c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 2);
1209
1210		if (c->prompt_index == size) {
1211			c->prompt_buffer[c->prompt_index++] = key;
1212			c->prompt_buffer[c->prompt_index] = '\0';
1213		} else {
1214			memmove(c->prompt_buffer + c->prompt_index + 1,
1215			    c->prompt_buffer + c->prompt_index,
1216			    size + 1 - c->prompt_index);
1217			c->prompt_buffer[c->prompt_index++] = key;
1218		}
1219
1220		if (c->prompt_flags & PROMPT_SINGLE) {
1221			if (c->prompt_callbackfn(
1222			    c->prompt_data, c->prompt_buffer) == 0)
1223				status_prompt_clear(c);
1224		}
1225
1226		c->flags |= CLIENT_STATUS;
1227		break;
1228	default:
1229		break;
1230	}
1231}
1232
1233/* Get previous line from the history. */
1234const char *
1235status_prompt_up_history(u_int *idx)
1236{
1237	u_int size;
1238
1239	/*
1240	 * History runs from 0 to size - 1.
1241	 *
1242	 * Index is from 0 to size. Zero is empty.
1243	 */
1244
1245	size = ARRAY_LENGTH(&status_prompt_history);
1246	if (size == 0 || *idx == size)
1247		return (NULL);
1248	(*idx)++;
1249	return (ARRAY_ITEM(&status_prompt_history, size - *idx));
1250}
1251
1252/* Get next line from the history. */
1253const char *
1254status_prompt_down_history(u_int *idx)
1255{
1256	u_int size;
1257
1258	size = ARRAY_LENGTH(&status_prompt_history);
1259	if (size == 0 || *idx == 0)
1260		return ("");
1261	(*idx)--;
1262	if (*idx == 0)
1263		return ("");
1264	return (ARRAY_ITEM(&status_prompt_history, size - *idx));
1265}
1266
1267/* Add line to the history. */
1268void
1269status_prompt_add_history(const char *line)
1270{
1271	u_int size;
1272
1273	size = ARRAY_LENGTH(&status_prompt_history);
1274	if (size > 0 && strcmp(ARRAY_LAST(&status_prompt_history), line) == 0)
1275		return;
1276
1277	if (size == PROMPT_HISTORY) {
1278		free(ARRAY_FIRST(&status_prompt_history));
1279		ARRAY_REMOVE(&status_prompt_history, 0);
1280	}
1281
1282	ARRAY_ADD(&status_prompt_history, xstrdup(line));
1283}
1284
1285/* Complete word. */
1286char *
1287status_prompt_complete(const char *s)
1288{
1289	const struct cmd_entry 	  	       **cmdent;
1290	const struct options_table_entry	*oe;
1291	ARRAY_DECL(, const char *)		 list;
1292	char					*prefix, *s2;
1293	u_int					 i;
1294	size_t				 	 j;
1295
1296	if (*s == '\0')
1297		return (NULL);
1298
1299	/* First, build a list of all the possible matches. */
1300	ARRAY_INIT(&list);
1301	for (cmdent = cmd_table; *cmdent != NULL; cmdent++) {
1302		if (strncmp((*cmdent)->name, s, strlen(s)) == 0)
1303			ARRAY_ADD(&list, (*cmdent)->name);
1304	}
1305	for (oe = server_options_table; oe->name != NULL; oe++) {
1306		if (strncmp(oe->name, s, strlen(s)) == 0)
1307			ARRAY_ADD(&list, oe->name);
1308	}
1309	for (oe = session_options_table; oe->name != NULL; oe++) {
1310		if (strncmp(oe->name, s, strlen(s)) == 0)
1311			ARRAY_ADD(&list, oe->name);
1312	}
1313	for (oe = window_options_table; oe->name != NULL; oe++) {
1314		if (strncmp(oe->name, s, strlen(s)) == 0)
1315			ARRAY_ADD(&list, oe->name);
1316	}
1317
1318	/* If none, bail now. */
1319	if (ARRAY_LENGTH(&list) == 0) {
1320		ARRAY_FREE(&list);
1321		return (NULL);
1322	}
1323
1324	/* If an exact match, return it, with a trailing space. */
1325	if (ARRAY_LENGTH(&list) == 1) {
1326		xasprintf(&s2, "%s ", ARRAY_FIRST(&list));
1327		ARRAY_FREE(&list);
1328		return (s2);
1329	}
1330
1331	/* Now loop through the list and find the longest common prefix. */
1332	prefix = xstrdup(ARRAY_FIRST(&list));
1333	for (i = 1; i < ARRAY_LENGTH(&list); i++) {
1334		s = ARRAY_ITEM(&list, i);
1335
1336		j = strlen(s);
1337		if (j > strlen(prefix))
1338			j = strlen(prefix);
1339		for (; j > 0; j--) {
1340			if (prefix[j - 1] != s[j - 1])
1341				prefix[j - 1] = '\0';
1342		}
1343	}
1344
1345	ARRAY_FREE(&list);
1346	return (prefix);
1347}
1348