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Date:: Mon Jul 19 10:01:57 2021 UTC
Message:: don't crash on forward-char on empty pages
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1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <limits.h>
18 #include <stdlib.h>
19 #include <string.h>
20 
21 #include "compl.h"
22 #include "defaults.h"
23 #include "minibuffer.h"
24 #include "telescope.h"
25 #include "ui.h"
26 #include "utf8.h"
27 
28 #define GUARD_RECURSIVE_MINIBUFFER()				\
29 	do {							\
30 		if (in_minibuffer) {				\
31 			message("enable-recursive-minibuffers " \
32 			    "is not yet available.");		\
33 			return;					\
34 		}						\
35 	} while(0)
36 
37 /* return 1 if moved, 0 otherwise */
38 static inline int
39 forward_line(struct buffer *buffer, int n)
40 {
41 	struct vline *vl;
42 	int did;
43 
44 	if (buffer->current_line == NULL)
45 		return 0;
46 	vl = buffer->current_line;
47 
48 	did = 0;
49 	while (n != 0) {
50 		if (n > 0) {
51 			vl = TAILQ_NEXT(vl, vlines);
52 			if (vl == NULL)
53 				return did;
54 			if (vl->parent->flags & L_HIDDEN)
55 				continue;
56 			buffer->current_line = vl;
57 			n--;
58 		} else {
59 			vl = TAILQ_PREV(vl, vhead, vlines);
60 			if (vl == NULL)
61 				return did;
62 			if (vl->parent->flags & L_HIDDEN)
63 				continue;
64 			if (buffer->current_line == buffer->top_line) {
65 				buffer->line_off--;
66 				buffer->top_line = vl;
67 			}
68 			buffer->current_line = vl;
69 			n++;
70 		}
71 
72 		did = 1;
73 	}
74 
75 	return did;
76 }
77 
78 void
79 cmd_previous_line(struct buffer *buffer)
80 {
81 	forward_line(buffer, -1);
82 }
83 
84 void
85 cmd_next_line(struct buffer *buffer)
86 {
87 	forward_line(buffer, +1);
88 }
89 
90 void
91 cmd_backward_char(struct buffer *buffer)
92 {
93 	if (buffer->cpoff != 0)
94 		buffer->cpoff--;
95 }
96 
97 void
98 cmd_forward_char(struct buffer *buffer)
99 {
100 	size_t len = 0;
101 
102 	if (buffer->current_line == NULL)
103 		return;
104 
105 	if (buffer->current_line->line != NULL)
106 		len = utf8_cplen(buffer->current_line->line);
107 	if (++buffer->cpoff > len)
108 		buffer->cpoff = len;
109 }
110 
111 void
112 cmd_backward_paragraph(struct buffer *buffer)
113 {
114 	do {
115 		if (!forward_line(buffer, -1)) {
116 			message("No previous paragraph");
117 			return;
118 		}
119 	} while (buffer->current_line->line != NULL ||
120 	    buffer->current_line->parent->type != LINE_TEXT);
121 }
122 
123 void
124 cmd_forward_paragraph(struct buffer *buffer)
125 {
126 	do {
127 		if (!forward_line(buffer, +1)) {
128 			message("No next paragraph");
129 			return;
130 		}
131 	} while (buffer->current_line->line != NULL ||
132 	    buffer->current_line->parent->type != LINE_TEXT);
133 }
134 
135 void
136 cmd_move_beginning_of_line(struct buffer *buffer)
137 {
138 	buffer->cpoff = 0;
139 }
140 
141 void
142 cmd_move_end_of_line(struct buffer *buffer)
143 {
144 	struct vline	*vl;
145 
146 	vl = buffer->current_line;
147 	if (vl->line == NULL)
148 		return;
149 	buffer->cpoff = utf8_cplen(vl->line);
150 }
151 
152 void
153 cmd_redraw(struct buffer *buffer)
154 {
155         ui_schedule_redraw();
156 }
157 
158 void
159 cmd_scroll_line_up(struct buffer *buffer)
160 {
161 	struct vline	*vl;
162 
163 	if ((vl = TAILQ_PREV(buffer->top_line, vhead, vlines))
164 	    == NULL)
165 		return;
166 
167 	forward_line(buffer, -1);
168 
169 	buffer->top_line = vl;
170 }
171 
172 void
173 cmd_scroll_line_down(struct buffer *buffer)
174 {
175 	if (!forward_line(buffer, +1))
176 		return;
177 
178 	buffer->top_line = TAILQ_NEXT(buffer->top_line, vlines);
179 	buffer->line_off++;
180 }
181 
182 void
183 cmd_scroll_up(struct buffer *buffer)
184 {
185 	struct vline	*vl;
186 	int		 i;
187 
188 	for (i = 0; i < body_lines; ++i) {
189 		vl = TAILQ_PREV(buffer->top_line, vhead, vlines);
190 		if (vl == NULL)
191 			break;
192 		buffer->top_line = vl;
193 		forward_line(buffer, -1);
194 	}
195 }
196 
197 void
198 cmd_scroll_down(struct buffer *buffer)
199 {
200 	int i;
201 
202 	for (i = 0; i < body_lines; ++i) {
203 		if (!forward_line(buffer, +1))
204 			break;
205 
206 		buffer->top_line = TAILQ_NEXT(buffer->top_line,
207 		    vlines);
208 	}
209 }
210 
211 void
212 cmd_beginning_of_buffer(struct buffer *buffer)
213 {
214 	buffer->current_line = TAILQ_FIRST(&buffer->head);
215 	buffer->cpoff = 0;
216 	buffer->top_line = buffer->current_line;
217 	buffer->line_off = 0;
218 }
219 
220 void
221 cmd_end_of_buffer(struct buffer *buffer)
222 {
223 	buffer->current_line = TAILQ_LAST(&buffer->head, vhead);
224 
225 	/* deal with invisible lines */
226 	if (buffer->current_line->parent->flags & L_HIDDEN)
227 		forward_line(buffer, -1);
228 
229 	cmd_move_end_of_line(buffer);
230 }
231 
232 void
233 cmd_kill_telescope(struct buffer *buffer)
234 {
235 	save_session();
236 	event_loopbreak();
237 }
238 
239 void
240 cmd_push_button(struct buffer *buffer)
241 {
242 	struct vline	*vl;
243 	struct line	*l;
244 
245 	vl = buffer->current_line;
246 	switch (vl->parent->type) {
247 	case LINE_LINK:
248 		load_url_in_tab(current_tab, vl->parent->alt);
249 		break;
250 	case LINE_PRE_START:
251 		l = TAILQ_NEXT(vl->parent, lines);
252 		for (; l != NULL; l = TAILQ_NEXT(l, lines)) {
253 			if (l->type == LINE_PRE_END)
254 				break;
255 			l->flags ^= L_HIDDEN;
256 			if (l->flags & L_HIDDEN)
257 				buffer->line_max--;
258 			else
259 				buffer->line_max++;
260 		}
261 		break;
262 	default:
263 		break;
264 	}
265 }
266 
267 void
268 cmd_push_button_new_tab(struct buffer *buffer)
269 {
270 	struct vline	*vl;
271 
272 	vl = buffer->current_line;
273 	if (vl->parent->type != LINE_LINK)
274 		return;
275 
276 	new_tab(vl->parent->alt);
277 }
278 
279 void
280 cmd_previous_button(struct buffer *buffer)
281 {
282 	struct excursion place;
283 
284 	save_excursion(&place, buffer);
285 
286 	do {
287 		if (!forward_line(buffer, -1)) {
288 			restore_excursion(&place, buffer);
289 			message("No previous link");
290 			return;
291 		}
292 	} while (buffer->current_line->parent->type != LINE_LINK);
293 }
294 
295 void
296 cmd_next_button(struct buffer *buffer)
297 {
298 	struct excursion place;
299 
300 	save_excursion(&place, buffer);
301 
302 	do {
303 		if (!forward_line(buffer, +1)){
304 			restore_excursion(&place, buffer);
305 			message("No next link");
306 			return;
307 		}
308 	} while (buffer->current_line->parent->type != LINE_LINK);
309 }
310 
311 static inline int
312 is_heading(const struct line *l)
313 {
314 	return l->type == LINE_TITLE_1 ||
315 		l->type == LINE_TITLE_2 ||
316 		l->type == LINE_TITLE_3;
317 }
318 
319 void
320 cmd_previous_heading(struct buffer *buffer)
321 {
322 	struct excursion place;
323 
324 	save_excursion(&place, buffer);
325 
326 	do {
327 		if (!forward_line(buffer, -1)) {
328 			restore_excursion(&place, buffer);
329 			message("No previous heading");
330 			return;
331 		}
332 	} while (!is_heading(buffer->current_line->parent));
333 }
334 
335 void
336 cmd_next_heading(struct buffer *buffer)
337 {
338 	struct excursion place;
339 
340 	save_excursion(&place, buffer);
341 
342 	do {
343 		if (!forward_line(buffer, +1)) {
344 			restore_excursion(&place, buffer);
345 			message("No next heading");
346 			return;
347 		}
348 	} while (!is_heading(buffer->current_line->parent));
349 }
350 
351 void
352 cmd_previous_page(struct buffer *buffer)
353 {
354 	if (!load_previous_page(current_tab))
355 		message("No previous page");
356 	else
357 		start_loading_anim(current_tab);
358 }
359 
360 void
361 cmd_next_page(struct buffer *buffer)
362 {
363 	if (!load_next_page(current_tab))
364 		message("No next page");
365 	else
366 		start_loading_anim(current_tab);
367 }
368 
369 void
370 cmd_clear_minibuf(struct buffer *buffer)
371 {
372         message(NULL);
373 }
374 
375 void
376 cmd_execute_extended_command(struct buffer *buffer)
377 {
378 	size_t	 len;
379 
380 	GUARD_RECURSIVE_MINIBUFFER();
381 
382 	enter_minibuffer(eecmd_self_insert, eecmd_select, exit_minibuffer,
383 	    &eecmd_history, compl_eecmd, NULL);
384 
385 	len = sizeof(ministate.prompt);
386 	strlcpy(ministate.prompt, "", len);
387 
388 	if (thiskey.meta)
389 		strlcat(ministate.prompt, "M-", len);
390 
391 	strlcat(ministate.prompt, ui_keyname(thiskey.key), len);
392 
393 	if (thiskey.meta)
394 		strlcat(ministate.prompt, " ", len);
395 }
396 
397 void
398 cmd_tab_close(struct buffer *buffer)
399 {
400 	struct tab *tab, *t;
401 
402 	tab = current_tab;
403 	if (TAILQ_PREV(tab, tabshead, tabs) == NULL &&
404 	    TAILQ_NEXT(tab, tabs) == NULL) {
405 		message("Can't close the only tab.");
406 		return;
407 	}
408 
409 	if (evtimer_pending(&tab->loadingev, NULL))
410 		evtimer_del(&tab->loadingev);
411 
412 	stop_tab(tab);
413 
414 	if ((t = TAILQ_PREV(tab, tabshead, tabs)) == NULL)
415 		t = TAILQ_NEXT(tab, tabs);
416 	TAILQ_REMOVE(&tabshead, tab, tabs);
417 	free(tab);
418 
419 	switch_to_tab(t);
420 }
421 
422 void
423 cmd_tab_close_other(struct buffer *buffer)
424 {
425 	struct tab *t, *i;
426 
427 	TAILQ_FOREACH_SAFE(t, &tabshead, tabs, i) {
428 		if (t == current_tab)
429 			continue;
430 
431 		stop_tab(t);
432 		TAILQ_REMOVE(&tabshead, t, tabs);
433 		free(t);
434 	}
435 }
436 
437 void
438 cmd_tab_new(struct buffer *buffer)
439 {
440 	const char *url;
441 
442 	if ((url = new_tab_url) == NULL)
443 		url = NEW_TAB_URL;
444 
445 	new_tab(url);
446 }
447 
448 void
449 cmd_tab_next(struct buffer *buffer)
450 {
451 	struct tab *t;
452 
453 	if ((t = TAILQ_NEXT(current_tab, tabs)) == NULL)
454 		t = TAILQ_FIRST(&tabshead);
455 	switch_to_tab(t);
456 }
457 
458 void
459 cmd_tab_previous(struct buffer *buffer)
460 {
461 	struct tab *t;
462 
463 	if ((t = TAILQ_PREV(current_tab, tabshead, tabs)) == NULL)
464 		t = TAILQ_LAST(&tabshead, tabshead);
465 	switch_to_tab(t);
466 }
467 
468 void
469 cmd_tab_move(struct buffer *buffer)
470 {
471 	struct tab *t;
472 
473 	t = TAILQ_NEXT(current_tab, tabs);
474 	TAILQ_REMOVE(&tabshead, current_tab, tabs);
475 
476 	if (t == NULL)
477 		TAILQ_INSERT_HEAD(&tabshead, current_tab, tabs);
478 	else
479 		TAILQ_INSERT_AFTER(&tabshead, t, current_tab, tabs);
480 }
481 
482 void
483 cmd_tab_move_to(struct buffer *buffer)
484 {
485 	struct tab *t;
486 
487 	t = TAILQ_PREV(current_tab, tabshead, tabs);
488 	TAILQ_REMOVE(&tabshead, current_tab, tabs);
489 
490 	if (t == NULL) {
491 		if (TAILQ_EMPTY(&tabshead))
492 			TAILQ_INSERT_HEAD(&tabshead, current_tab, tabs);
493 		else
494 			TAILQ_INSERT_TAIL(&tabshead, current_tab, tabs);
495 	} else
496 		TAILQ_INSERT_BEFORE(t, current_tab, tabs);
497 }
498 
499 void
500 cmd_tab_select(struct buffer *buffer)
501 {
502 	GUARD_RECURSIVE_MINIBUFFER();
503 
504 	enter_minibuffer(sensible_self_insert, ts_select, exit_minibuffer,
505 	    NULL, compl_ts, NULL);
506 	strlcpy(ministate.prompt, "Select tab: ", sizeof(ministate.prompt));
507 }
508 
509 void
510 cmd_load_url(struct buffer *buffer)
511 {
512 	GUARD_RECURSIVE_MINIBUFFER();
513 
514 	enter_minibuffer(sensible_self_insert, lu_select, exit_minibuffer,
515 	    &lu_history, NULL, NULL);
516 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
517 	strlcpy(ministate.buf, "gemini://", sizeof(ministate.buf));
518 	cmd_move_end_of_line(&ministate.buffer);
519 }
520 
521 void
522 cmd_load_current_url(struct buffer *buffer)
523 {
524 	GUARD_RECURSIVE_MINIBUFFER();
525 
526 	enter_minibuffer(sensible_self_insert, lu_select, exit_minibuffer,
527 	    &lu_history, NULL, NULL);
528 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
529 	strlcpy(ministate.buf, current_tab->hist_cur->h, sizeof(ministate.buf));
530 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
531 }
532 
533 void
534 cmd_reload_page(struct buffer *buffer)
535 {
536 	load_url_in_tab(current_tab, current_tab->hist_cur->h);
537 }
538 
539 void
540 cmd_bookmark_page(struct buffer *buffer)
541 {
542 	GUARD_RECURSIVE_MINIBUFFER();
543 
544 	enter_minibuffer(sensible_self_insert, bp_select, exit_minibuffer, NULL,
545 	    NULL, NULL);
546 	strlcpy(ministate.prompt, "Bookmark URL: ", sizeof(ministate.prompt));
547 	strlcpy(ministate.buf, current_tab->hist_cur->h, sizeof(ministate.buf));
548 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
549 }
550 
551 void
552 cmd_list_bookmarks(struct buffer *buffer)
553 {
554 	load_url_in_tab(current_tab, "about:bookmarks");
555 }
556 
557 void
558 cmd_toggle_help(struct buffer *buffer)
559 {
560 	ui_toggle_side_window();
561 }
562 
563 void
564 cmd_link_select(struct buffer *buffer)
565 {
566 	struct line *l;
567 
568 	GUARD_RECURSIVE_MINIBUFFER();
569 
570 	l = TAILQ_FIRST(&buffer->page.head);
571 	while (l != NULL && l->type != LINE_LINK)
572 		l = TAILQ_NEXT(l, lines);
573 
574 	if (l == NULL) {
575 		message("No links found");
576 		return;
577 	}
578 
579 	enter_minibuffer(sensible_self_insert, ls_select, exit_minibuffer,
580 	    NULL, compl_ls, l);
581 	strlcpy(ministate.prompt, "Select link: ", sizeof(ministate.prompt));
582 }
583 
584 void
585 cmd_swiper(struct buffer *buffer)
586 {
587 	GUARD_RECURSIVE_MINIBUFFER();
588 
589 	enter_minibuffer(sensible_self_insert, swiper_select, exit_minibuffer,
590 	    NULL, compl_swiper, TAILQ_FIRST(&buffer->page.head));
591 	strlcpy(ministate.prompt, "Select line: ", sizeof(ministate.prompt));
592 }
593 
594 void
595 cmd_toc(struct buffer *buffer)
596 {
597 	struct line *l;
598 
599 	GUARD_RECURSIVE_MINIBUFFER();
600 
601 	l = TAILQ_FIRST(&buffer->page.head);
602 	while (l != NULL &&
603 	    l->type != LINE_TITLE_1 &&
604 	    l->type != LINE_TITLE_2 &&
605 	    l->type != LINE_TITLE_3)
606 		l = TAILQ_NEXT(l, lines);
607 
608 	if (l == NULL) {
609 		message("No headings found");
610 		return;
611 	}
612 
613 	enter_minibuffer(sensible_self_insert, toc_select, exit_minibuffer,
614 	    NULL, compl_toc, l);
615 	strlcpy(ministate.prompt, "Select heading: ",
616 	    sizeof(ministate.prompt));
617 }
618 
619 void
620 cmd_inc_fill_column(struct buffer *buffer)
621 {
622 	if (fill_column == INT_MAX)
623 		return;
624 
625 	fill_column += 2;
626 	message("fill-column: %d", fill_column);
627 
628 	ui_schedule_redraw();
629 }
630 
631 void
632 cmd_dec_fill_column(struct buffer *buffer)
633 {
634 	if (fill_column == INT_MAX || fill_column < 8)
635 		return;
636 
637 	fill_column -= 2;
638 	message("fill-column: %d", fill_column);
639 
640 	ui_schedule_redraw();
641 }
642 
643 void
644 cmd_olivetti_mode(struct buffer *buffer)
645 {
646 	olivetti_mode = !olivetti_mode;
647 	if (olivetti_mode)
648 		message("olivetti-mode enabled");
649 	else
650 		message("olivetti-mode disabled");
651 
652 	ui_schedule_redraw();
653 }
654 
655 void
656 cmd_mini_delete_char(struct buffer *buffer)
657 {
658 	char *c, *n;
659 
660 	if (!in_minibuffer) {
661 		message("text is read-only");
662 		return;
663 	}
664 
665 	minibuffer_taint_hist();
666 
667 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
668 	if (*c == '\0')
669 		return;
670 	n = utf8_next_cp(c);
671 
672 	memmove(c, n, strlen(n)+1);
673 
674 	recompute_completions(0);
675 }
676 
677 void
678 cmd_mini_delete_backward_char(struct buffer *buffer)
679 {
680 	char *c, *p, *start;
681 
682 	if (!in_minibuffer) {
683 		message("text is read-only");
684 		return;
685 	}
686 
687 	minibuffer_taint_hist();
688 
689 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
690 	start = buffer->current_line->line;
691 	if (c == start)
692 		return;
693 	p = utf8_prev_cp(c-1, start);
694 
695 	memmove(p, c, strlen(c)+1);
696 	buffer->cpoff--;
697 
698 	recompute_completions(0);
699 }
700 
701 void
702 cmd_mini_kill_line(struct buffer *buffer)
703 {
704 	char *c;
705 
706 	if (!in_minibuffer) {
707 		message("text is read-only");
708 		return;
709 	}
710 
711 	minibuffer_taint_hist();
712 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
713 	*c = '\0';
714 
715 	recompute_completions(0);
716 }
717 
718 void
719 cmd_mini_abort(struct buffer *buffer)
720 {
721 	if (!in_minibuffer)
722 		return;
723 
724 	ministate.abortfn();
725 }
726 
727 void
728 cmd_mini_complete_and_exit(struct buffer *buffer)
729 {
730 	if (!in_minibuffer)
731 		return;
732 
733 	minibuffer_taint_hist();
734 	ministate.donefn();
735 }
736 
737 void
738 cmd_mini_previous_history_element(struct buffer *buffer)
739 {
740 	if (ministate.history == NULL) {
741 		message("No history");
742 		return;
743 	}
744 
745 	if (ministate.hist_cur == NULL ||
746 	    (ministate.hist_cur = TAILQ_PREV(ministate.hist_cur, mhisthead, entries)) == NULL) {
747 		ministate.hist_cur = TAILQ_LAST(&ministate.history->head, mhisthead);
748 		ministate.hist_off = ministate.history->len - 1;
749 		if (ministate.hist_cur == NULL)
750 			message("No prev history item");
751 	} else {
752 		ministate.hist_off--;
753 	}
754 
755 	if (ministate.hist_cur != NULL)
756 		buffer->current_line->line = ministate.hist_cur->h;
757 }
758 
759 void
760 cmd_mini_next_history_element(struct buffer *buffer)
761 {
762 	if (ministate.history == NULL) {
763 		message("No history");
764 		return;
765 	}
766 
767 	if (ministate.hist_cur == NULL ||
768 	    (ministate.hist_cur = TAILQ_NEXT(ministate.hist_cur, entries)) == NULL) {
769 		ministate.hist_cur = TAILQ_FIRST(&ministate.history->head);
770 		ministate.hist_off = 0;
771 		if (ministate.hist_cur == NULL)
772 			message("No next history item");
773 	} else {
774 		ministate.hist_off++;
775 	}
776 
777 	if (ministate.hist_cur != NULL)
778 		buffer->current_line->line = ministate.hist_cur->h;
779 }
780 
781 void
782 cmd_previous_completion(struct buffer *buffer)
783 {
784 	if (in_minibuffer != MB_COMPREAD)
785 		return;
786 
787 	buffer = &ministate.compl.buffer;
788 
789 	if (buffer->current_line != NULL)
790 		buffer->current_line->parent->type = LINE_COMPL;
791 
792 	forward_line(buffer, -1);
793 
794 	if (buffer->current_line != NULL)
795 		buffer->current_line->parent->type = LINE_COMPL_CURRENT;
796 }
797 
798 void
799 cmd_next_completion(struct buffer *buffer)
800 {
801 	if (in_minibuffer != MB_COMPREAD)
802 		return;
803 
804 	buffer = &ministate.compl.buffer;
805 
806 	if (buffer->current_line != NULL)
807 		buffer->current_line->parent->type = LINE_COMPL;
808 
809 	forward_line(buffer, +1);
810 
811 	if (buffer->current_line != NULL)
812 		buffer->current_line->parent->type = LINE_COMPL_CURRENT;
813 }
814 
815 void
816 cmd_insert_current_candidate(struct buffer *buffer)
817 {
818 	struct vline *vl;
819 
820 	if (in_minibuffer != MB_COMPREAD)
821 		return;
822 
823 	buffer = &ministate.compl.buffer;
824 	if ((vl = buffer->current_line) == NULL)
825 		return;
826 
827 	minibuffer_taint_hist();
828 	strlcpy(ministate.buf, vl->parent->line, sizeof(ministate.buf));
829 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
830 }
831 
832 void
833 cmd_suspend_telescope(struct buffer *buffer)
834 {
835 	message("Zzz...");
836 	ui_suspend();
837 }
838 
839 void
840 cmd_toggle_pre_wrap(struct buffer *buffer)
841 {
842 	dont_wrap_pre = !dont_wrap_pre;
843 
844 	if (dont_wrap_pre)
845 		message("Don't wrap preformatted blocks");
846 	else
847 		message("Wrap preformatted blocks");
848 
849 	ui_schedule_redraw();
850 }
851 
852 void
853 cmd_mini_goto_beginning(struct buffer *buffer)
854 {
855 	struct vline *vl;
856 
857 	if (!in_minibuffer)
858 		return;
859 
860 	buffer = &ministate.compl.buffer;
861 
862 	if ((vl = buffer->current_line) != NULL)
863 		vl->parent->type = LINE_COMPL;
864 
865 	vl = TAILQ_FIRST(&buffer->head);
866 	while (vl != NULL && vl->parent->flags & L_HIDDEN)
867 		vl = TAILQ_NEXT(vl, vlines);
868 
869 	if (vl == NULL)
870 		return;
871 
872 	vl->parent->type = LINE_COMPL_CURRENT;
873 	buffer->top_line = vl;
874 	buffer->current_line = vl;
875 }
876 
877 void
878 cmd_mini_goto_end(struct buffer *buffer)
879 {
880 	struct vline *vl;
881 
882 	if (!in_minibuffer)
883 		return;
884 
885 	buffer = &ministate.compl.buffer;
886 
887 	if ((vl = buffer->current_line) != NULL)
888 		vl->parent->type = LINE_COMPL;
889 
890 	vl = TAILQ_LAST(&buffer->head, vhead);
891 	while (vl != NULL && vl->parent->flags & L_HIDDEN)
892 		vl = TAILQ_PREV(vl, vhead, vlines);
893 
894 	if (vl == NULL)
895 		return;
896 
897 	vl->parent->type = LINE_COMPL_CURRENT;
898 	buffer->current_line = vl;
899 }