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Date:: Mon Feb 12 15:51:59 2024 UTC
Message:: support gopher urls for search; document default-search-engine
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1 /*
2  * Copyright (c) 2021, 2024 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 "compat.h"
18 
19 #include <limits.h>
20 #include <stdlib.h>
21 #include <string.h>
22 
23 #include "certs.h"
24 #include "cmd.h"
25 #include "compl.h"
26 #include "defaults.h"
27 #include "hist.h"
28 #include "keymap.h"
29 #include "mcache.h"
30 #include "minibuffer.h"
31 #include "session.h"
32 #include "telescope.h"
33 #include "ui.h"
34 #include "utf8.h"
35 #include "utils.h"
36 
37 #define GUARD_RECURSIVE_MINIBUFFER()				\
38 	do {							\
39 		if (in_minibuffer) {				\
40 			message("enable-recursive-minibuffers " \
41 			    "is not yet available.");		\
42 			return;					\
43 		}						\
44 	} while(0)
45 
46 #define GUARD_READ_ONLY()				\
47 	do {						\
48 		if (!in_minibuffer) {			\
49 			message("text is read-only");	\
50 			return;				\
51 		}					\
52 	} while(0)
53 
54 /* return 1 if moved, 0 otherwise */
55 static inline int
56 forward_line(struct buffer *buffer, int n)
57 {
58 	struct vline *vl;
59 	int did;
60 
61 	if (buffer->current_line == NULL)
62 		return 0;
63 	vl = buffer->current_line;
64 
65 	did = 0;
66 	while (n != 0) {
67 		if (n > 0) {
68 			vl = TAILQ_NEXT(vl, vlines);
69 			if (vl == NULL)
70 				return did;
71 			if (vl->parent->flags & L_HIDDEN)
72 				continue;
73 			buffer->current_line = vl;
74 			n--;
75 		} else {
76 			vl = TAILQ_PREV(vl, vhead, vlines);
77 			if (vl == NULL)
78 				return did;
79 			if (vl->parent->flags & L_HIDDEN)
80 				continue;
81 			if (buffer->current_line == buffer->top_line) {
82 				buffer->line_off--;
83 				buffer->top_line = vl;
84 			}
85 			buffer->current_line = vl;
86 			n++;
87 		}
88 
89 		did = 1;
90 	}
91 
92 	return did;
93 }
94 
95 void
96 cmd_previous_line(struct buffer *buffer)
97 {
98 	forward_line(buffer, -1);
99 }
100 
101 void
102 cmd_next_line(struct buffer *buffer)
103 {
104 	forward_line(buffer, +1);
105 }
106 
107 void
108 cmd_backward_char(struct buffer *buffer)
109 {
110 	if (buffer->cpoff != 0)
111 		buffer->cpoff--;
112 }
113 
114 void
115 cmd_forward_char(struct buffer *buffer)
116 {
117 	if (buffer->current_line == NULL)
118 		return;
119 	if (buffer->current_line->cplen > buffer->cpoff)
120 		buffer->cpoff++;
121 }
122 
123 void
124 cmd_backward_paragraph(struct buffer *buffer)
125 {
126 	do {
127 		if (!forward_line(buffer, -1)) {
128 			message("No previous paragraph");
129 			return;
130 		}
131 	} while (buffer->current_line->len != 0 ||
132 	    buffer->current_line->parent->type != LINE_TEXT);
133 }
134 
135 void
136 cmd_forward_paragraph(struct buffer *buffer)
137 {
138 	do {
139 		if (!forward_line(buffer, +1)) {
140 			message("No next paragraph");
141 			return;
142 		}
143 	} while (buffer->current_line->len != 0 ||
144 	    buffer->current_line->parent->type != LINE_TEXT);
145 }
146 
147 void
148 cmd_move_beginning_of_line(struct buffer *buffer)
149 {
150 	buffer->cpoff = 0;
151 }
152 
153 void
154 cmd_move_end_of_line(struct buffer *buffer)
155 {
156 	struct vline	*vl;
157 
158 	vl = buffer->current_line;
159 	if (vl == NULL)
160 		return;
161 	buffer->cpoff = vl->cplen;
162 }
163 
164 void
165 cmd_redraw(struct buffer *buffer)
166 {
167 	ui_schedule_redraw();
168 }
169 
170 void
171 cmd_scroll_line_up(struct buffer *buffer)
172 {
173 	struct vline	*vl;
174 
175 	for (;;) {
176 		if (buffer->top_line == NULL)
177 			return;
178 
179 		if ((vl = TAILQ_PREV(buffer->top_line, vhead, vlines))
180 		    == NULL)
181 			return;
182 
183 		buffer->top_line = vl;
184 
185 		if (vl->parent->flags & L_HIDDEN)
186 			continue;
187 
188 		break;
189 	}
190 
191 	buffer->line_off--;
192 
193 	forward_line(buffer, -1);
194 }
195 
196 void
197 cmd_scroll_line_down(struct buffer *buffer)
198 {
199 	if (!forward_line(buffer, +1))
200 		return;
201 
202 	for (;;) {
203 		if (buffer->top_line == NULL)
204 			return;
205 
206 		buffer->top_line = TAILQ_NEXT(buffer->top_line, vlines);
207 		if (buffer->top_line->parent->flags & L_HIDDEN)
208 			continue;
209 		break;
210 	}
211 
212 	buffer->line_off++;
213 }
214 
215 void
216 cmd_scroll_up(struct buffer *buffer)
217 {
218 	struct vline	*vl;
219 	int		 i;
220 
221 	if (buffer->top_line == NULL)
222 		return;
223 
224 	for (i = 0; i < body_lines; ++i) {
225 		vl = TAILQ_PREV(buffer->top_line, vhead, vlines);
226 		if (vl == NULL)
227 			break;
228 		buffer->line_off--;
229 		buffer->top_line = vl;
230 		forward_line(buffer, -1);
231 	}
232 }
233 
234 void
235 cmd_scroll_down(struct buffer *buffer)
236 {
237 	int i;
238 
239 	if (buffer->top_line == NULL)
240 		return;
241 
242 	for (i = 0; i < body_lines; ++i) {
243 		if (!forward_line(buffer, +1))
244 			break;
245 
246 		buffer->top_line = TAILQ_NEXT(buffer->top_line,
247 		    vlines);
248 		buffer->line_off++;
249 	}
250 }
251 
252 void
253 cmd_beginning_of_buffer(struct buffer *buffer)
254 {
255 	buffer->current_line = TAILQ_FIRST(&buffer->head);
256 	buffer->cpoff = 0;
257 	buffer->top_line = buffer->current_line;
258 	buffer->line_off = 0;
259 }
260 
261 void
262 cmd_end_of_buffer(struct buffer *buffer)
263 {
264 	buffer->current_line = TAILQ_LAST(&buffer->head, vhead);
265 
266 	if (buffer->current_line == NULL)
267 		return;
268 
269 	/* deal with invisible lines */
270 	if (buffer->current_line->parent->flags & L_HIDDEN)
271 		forward_line(buffer, -1);
272 
273 	cmd_move_end_of_line(buffer);
274 }
275 
276 static void
277 kill_telescope_cb(int r, struct tab *tab)
278 {
279 	if (r) {
280 		save_session();
281 		event_loopbreak();
282 	}
283 }
284 
285 void
286 cmd_kill_telescope(struct buffer *buffer)
287 {
288 	yornp("really quit?", kill_telescope_cb, NULL);
289 }
290 
291 void
292 cmd_push_button(struct buffer *buffer)
293 {
294 	struct vline	*vl;
295 	struct line	*l;
296 
297 	vl = buffer->current_line;
298 
299 	if (vl == NULL)
300 		return;
301 
302 	switch (vl->parent->type) {
303 	case LINE_LINK:
304 		load_url_in_tab(current_tab, vl->parent->alt, NULL,
305 		    LU_MODE_NOCACHE);
306 		break;
307 	case LINE_PRE_START:
308 		l = TAILQ_NEXT(vl->parent, lines);
309 		for (; l != NULL; l = TAILQ_NEXT(l, lines)) {
310 			if (l->type == LINE_PRE_END)
311 				break;
312 			l->flags ^= L_HIDDEN;
313 			if (l->flags & L_HIDDEN)
314 				buffer->line_max--;
315 			else
316 				buffer->line_max++;
317 		}
318 		break;
319 	default:
320 		break;
321 	}
322 }
323 
324 void
325 cmd_push_button_new_tab(struct buffer *buffer)
326 {
327 	struct vline	*vl;
328 
329 	vl = buffer->current_line;
330 	if (vl == NULL || vl->parent->type != LINE_LINK)
331 		return;
332 
333 	new_tab(vl->parent->alt, hist_cur(current_tab->hist), current_tab);
334 }
335 
336 void
337 cmd_previous_button(struct buffer *buffer)
338 {
339 	struct excursion place;
340 
341 	save_excursion(&place, buffer);
342 
343 	do {
344 		if (!forward_line(buffer, -1)) {
345 			restore_excursion(&place, buffer);
346 			message("No previous link");
347 			return;
348 		}
349 	} while (buffer->current_line->parent->type != LINE_LINK);
350 }
351 
352 void
353 cmd_next_button(struct buffer *buffer)
354 {
355 	struct excursion place;
356 
357 	save_excursion(&place, buffer);
358 
359 	do {
360 		if (!forward_line(buffer, +1)){
361 			restore_excursion(&place, buffer);
362 			message("No next link");
363 			return;
364 		}
365 	} while (buffer->current_line->parent->type != LINE_LINK);
366 }
367 
368 static inline int
369 is_heading(const struct line *l)
370 {
371 	return l->type == LINE_TITLE_1 ||
372 		l->type == LINE_TITLE_2 ||
373 		l->type == LINE_TITLE_3;
374 }
375 
376 void
377 cmd_previous_heading(struct buffer *buffer)
378 {
379 	struct excursion place;
380 
381 	save_excursion(&place, buffer);
382 
383 	do {
384 		if (!forward_line(buffer, -1)) {
385 			restore_excursion(&place, buffer);
386 			message("No previous heading");
387 			return;
388 		}
389 	} while (!is_heading(buffer->current_line->parent));
390 }
391 
392 void
393 cmd_next_heading(struct buffer *buffer)
394 {
395 	struct excursion place;
396 
397 	save_excursion(&place, buffer);
398 
399 	do {
400 		if (!forward_line(buffer, +1)) {
401 			restore_excursion(&place, buffer);
402 			message("No next heading");
403 			return;
404 		}
405 	} while (!is_heading(buffer->current_line->parent));
406 }
407 
408 void
409 cmd_previous_page(struct buffer *buffer)
410 {
411 	if (!load_previous_page(current_tab))
412 		message("No previous page");
413 }
414 
415 void
416 cmd_next_page(struct buffer *buffer)
417 {
418 	if (!load_next_page(current_tab))
419 		message("No next page");
420 }
421 
422 void
423 cmd_clear_minibuf(struct buffer *buffer)
424 {
425 	message(NULL);
426 }
427 
428 void
429 cmd_execute_extended_command(struct buffer *buffer)
430 {
431 	size_t	 len;
432 
433 	GUARD_RECURSIVE_MINIBUFFER();
434 
435 	enter_minibuffer(sensible_self_insert, eecmd_select, exit_minibuffer,
436 	    eecmd_history, compl_eecmd, NULL, 1);
437 
438 	len = sizeof(ministate.prompt);
439 	strlcpy(ministate.prompt, "", len);
440 
441 	if (thiskey.meta)
442 		strlcat(ministate.prompt, "M-", len);
443 
444 	strlcat(ministate.prompt, ui_keyname(thiskey.key), len);
445 
446 	if (thiskey.meta)
447 		strlcat(ministate.prompt, " ", len);
448 }
449 
450 void
451 cmd_tab_close(struct buffer *buffer)
452 {
453 	struct tab *tab, *t;
454 
455 	tab = current_tab;
456 
457 	if ((t = TAILQ_NEXT(tab, tabs)) != NULL ||
458 	    (t = TAILQ_PREV(tab, tabshead, tabs)) != NULL) {
459 		switch_to_tab(t);
460 		kill_tab(tab, 0);
461 	} else
462 		message("Can't close the only tab.");
463 
464 }
465 
466 void
467 cmd_tab_close_other(struct buffer *buffer)
468 {
469 	struct tab *t, *i;
470 
471 	TAILQ_FOREACH_SAFE(t, &tabshead, tabs, i) {
472 		if (t == current_tab)
473 			continue;
474 
475 		kill_tab(t, 0);
476 	}
477 }
478 
479 void
480 cmd_tab_undo_close(struct buffer *buffer)
481 {
482 	struct tab *t;
483 
484 	if ((t = unkill_tab()) == NULL) {
485 		message("No recently-closed tabs");
486 		return;
487 	}
488 
489 	switch_to_tab(t);
490 }
491 
492 void
493 cmd_tab_new(struct buffer *buffer)
494 {
495 	const char *url;
496 
497 	if ((url = new_tab_url) == NULL)
498 		url = NEW_TAB_URL;
499 
500 	new_tab(url, NULL, NULL);
501 }
502 
503 void
504 cmd_tab_next(struct buffer *buffer)
505 {
506 	struct tab *t;
507 
508 	if ((t = TAILQ_NEXT(current_tab, tabs)) == NULL)
509 		t = TAILQ_FIRST(&tabshead);
510 	switch_to_tab(t);
511 }
512 
513 void
514 cmd_tab_previous(struct buffer *buffer)
515 {
516 	struct tab *t;
517 
518 	if ((t = TAILQ_PREV(current_tab, tabshead, tabs)) == NULL)
519 		t = TAILQ_LAST(&tabshead, tabshead);
520 	switch_to_tab(t);
521 }
522 
523 void
524 cmd_tab_move(struct buffer *buffer)
525 {
526 	struct tab *t;
527 
528 	t = TAILQ_NEXT(current_tab, tabs);
529 	TAILQ_REMOVE(&tabshead, current_tab, tabs);
530 
531 	if (t == NULL)
532 		TAILQ_INSERT_HEAD(&tabshead, current_tab, tabs);
533 	else
534 		TAILQ_INSERT_AFTER(&tabshead, t, current_tab, tabs);
535 }
536 
537 void
538 cmd_tab_move_to(struct buffer *buffer)
539 {
540 	struct tab *t;
541 
542 	t = TAILQ_PREV(current_tab, tabshead, tabs);
543 	TAILQ_REMOVE(&tabshead, current_tab, tabs);
544 
545 	if (t == NULL)
546 		TAILQ_INSERT_TAIL(&tabshead, current_tab, tabs);
547 	else
548 		TAILQ_INSERT_BEFORE(t, current_tab, tabs);
549 }
550 
551 void
552 cmd_tab_select(struct buffer *buffer)
553 {
554 	GUARD_RECURSIVE_MINIBUFFER();
555 
556 	enter_minibuffer(sensible_self_insert, ts_select, exit_minibuffer,
557 	    NULL, compl_ts, NULL, 1);
558 	strlcpy(ministate.prompt, "Select tab: ", sizeof(ministate.prompt));
559 }
560 
561 void
562 cmd_load_url(struct buffer *buffer)
563 {
564 	GUARD_RECURSIVE_MINIBUFFER();
565 
566 	enter_minibuffer(sensible_self_insert, lu_select, exit_minibuffer,
567 	    lu_history, compl_lu, NULL, 0);
568 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
569 }
570 
571 void
572 cmd_load_current_url(struct buffer *buffer)
573 {
574 	GUARD_RECURSIVE_MINIBUFFER();
575 
576 	enter_minibuffer(sensible_self_insert, lu_select, exit_minibuffer,
577 	    lu_history, compl_lu, NULL, 0);
578 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
579 	strlcpy(ministate.buf, hist_cur(current_tab->hist), sizeof(ministate.buf));
580 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
581 }
582 
583 void
584 cmd_reload_page(struct buffer *buffer)
585 {
586 	load_url_in_tab(current_tab, hist_cur(current_tab->hist), NULL,
587 	    LU_MODE_NOHIST|LU_MODE_NOCACHE);
588 }
589 
590 void
591 cmd_bookmark_page(struct buffer *buffer)
592 {
593 	GUARD_RECURSIVE_MINIBUFFER();
594 
595 	enter_minibuffer(sensible_self_insert, bp_select, exit_minibuffer, NULL,
596 	    NULL, NULL, 0);
597 	strlcpy(ministate.prompt, "Bookmark URL: ", sizeof(ministate.prompt));
598 	strlcpy(ministate.buf, hist_cur(current_tab->hist),
599 	    sizeof(ministate.buf));
600 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
601 }
602 
603 void
604 cmd_list_bookmarks(struct buffer *buffer)
605 {
606 	load_url_in_tab(current_tab, "about:bookmarks", NULL, LU_MODE_NONE);
607 }
608 
609 void
610 cmd_toggle_help(struct buffer *buffer)
611 {
612 	ui_toggle_side_window(SIDE_WINDOW_LEFT);
613 }
614 
615 void
616 cmd_link_select(struct buffer *buffer)
617 {
618 	struct line *l;
619 
620 	GUARD_RECURSIVE_MINIBUFFER();
621 
622 	l = TAILQ_FIRST(&buffer->page.head);
623 	while (l != NULL && l->type != LINE_LINK)
624 		l = TAILQ_NEXT(l, lines);
625 
626 	if (l == NULL) {
627 		message("No links found");
628 		return;
629 	}
630 
631 	enter_minibuffer(sensible_self_insert, ls_select, exit_minibuffer,
632 	    NULL, compl_ls, l, 1);
633 	strlcpy(ministate.prompt, "Select link: ", sizeof(ministate.prompt));
634 }
635 
636 void
637 cmd_swiper(struct buffer *buffer)
638 {
639 	GUARD_RECURSIVE_MINIBUFFER();
640 
641 	enter_minibuffer(sensible_self_insert, swiper_select, exit_minibuffer,
642 	    NULL, compl_swiper, TAILQ_FIRST(&buffer->page.head), 1);
643 	strlcpy(ministate.prompt, "Select line: ", sizeof(ministate.prompt));
644 }
645 
646 void
647 cmd_toc(struct buffer *buffer)
648 {
649 	struct line *l;
650 
651 	GUARD_RECURSIVE_MINIBUFFER();
652 
653 	l = TAILQ_FIRST(&buffer->page.head);
654 	while (l != NULL &&
655 	    l->type != LINE_TITLE_1 &&
656 	    l->type != LINE_TITLE_2 &&
657 	    l->type != LINE_TITLE_3)
658 		l = TAILQ_NEXT(l, lines);
659 
660 	if (l == NULL) {
661 		message("No headings found");
662 		return;
663 	}
664 
665 	enter_minibuffer(sensible_self_insert, toc_select, exit_minibuffer,
666 	    NULL, compl_toc, l, 1);
667 	strlcpy(ministate.prompt, "Select heading: ",
668 	    sizeof(ministate.prompt));
669 }
670 
671 void
672 cmd_inc_fill_column(struct buffer *buffer)
673 {
674 	if (fill_column == INT_MAX)
675 		return;
676 
677 	fill_column += 2;
678 	message("fill-column: %d", fill_column);
679 
680 	ui_schedule_redraw();
681 }
682 
683 void
684 cmd_dec_fill_column(struct buffer *buffer)
685 {
686 	if (fill_column == INT_MAX || fill_column < 8)
687 		return;
688 
689 	fill_column -= 2;
690 	message("fill-column: %d", fill_column);
691 
692 	ui_schedule_redraw();
693 }
694 
695 void
696 cmd_olivetti_mode(struct buffer *buffer)
697 {
698 	olivetti_mode = !olivetti_mode;
699 	if (olivetti_mode)
700 		message("olivetti-mode enabled");
701 	else
702 		message("olivetti-mode disabled");
703 
704 	ui_schedule_redraw();
705 }
706 
707 void
708 cmd_mini_delete_char(struct buffer *buffer)
709 {
710 	char *line, *c, *n;
711 
712 	GUARD_READ_ONLY();
713 
714 	minibuffer_taint_hist();
715 
716 	line = buffer->current_line->parent->line + buffer->current_line->from;
717 	c = utf8_nth(line, buffer->cpoff);
718 	if (*c == '\0')
719 		return;
720 	n = utf8_next_cp(c);
721 
722 	memmove(c, n, strlen(n)+1);
723 
724 	recompute_completions(0);
725 }
726 
727 void
728 cmd_mini_delete_backward_char(struct buffer *buffer)
729 {
730 	char *line, *c, *p;
731 
732 	GUARD_READ_ONLY();
733 
734 	minibuffer_taint_hist();
735 
736 	line = buffer->current_line->parent->line + buffer->current_line->from;
737 	c = utf8_nth(line, buffer->cpoff);
738 	if (c == line)
739 		return;
740 	p = utf8_prev_cp(c-1, line);
741 
742 	memmove(p, c, strlen(c)+1);
743 	buffer->cpoff--;
744 
745 	recompute_completions(0);
746 }
747 
748 void
749 cmd_mini_kill_line(struct buffer *buffer)
750 {
751 	char *line, *c;
752 
753 	GUARD_READ_ONLY();
754 
755 	minibuffer_taint_hist();
756 
757 	line = buffer->current_line->parent->line + buffer->current_line->from;
758 	c = utf8_nth(line, buffer->cpoff);
759 	*c = '\0';
760 
761 	recompute_completions(0);
762 }
763 
764 void
765 cmd_mini_kill_whole_line(struct buffer *buffer)
766 {
767 	GUARD_READ_ONLY();
768 
769 	minibuffer_taint_hist();
770 	*buffer->current_line->parent->line = '\0';
771 	buffer->cpoff = 0;
772 }
773 
774 void
775 cmd_mini_abort(struct buffer *buffer)
776 {
777 	if (!in_minibuffer)
778 		return;
779 
780 	ministate.abortfn();
781 }
782 
783 void
784 cmd_mini_complete_and_exit(struct buffer *buffer)
785 {
786 	struct vline *vl;
787 
788 	if (!in_minibuffer)
789 		return;
790 
791 	if (ministate.compl.must_select && ministate.hist == NULL) {
792 		vl = ministate.compl.buffer.current_line;
793 		if (vl == NULL || vl->parent->flags & L_HIDDEN ||
794 		    vl->parent->type == LINE_COMPL) {
795 			message("no match");
796 			return;
797 		}
798 	}
799 
800 	minibuffer_taint_hist();
801 	ministate.donefn();
802 }
803 
804 void
805 cmd_mini_previous_history_element(struct buffer *buffer)
806 {
807 	char *text;
808 
809 	if (ministate.hist == NULL) {
810 		message("No history");
811 		return;
812 	}
813 
814 	if (hist_prev(ministate.hist) == NULL) {
815 		message("No prev history item");
816 		return;
817 	}
818 
819 	ministate.editing = 0;
820 
821 	/* XXX the minibuffer line is never modified so this is fine */
822 	text = (char *)hist_cur(ministate.hist);
823 	buffer->current_line->parent->line = text;
824 	recompute_completions(0);
825 }
826 
827 void
828 cmd_mini_next_history_element(struct buffer *buffer)
829 {
830 	char *text;
831 
832 	if (ministate.hist == NULL) {
833 		message("No history");
834 		return;
835 	}
836 
837 	if (hist_next(ministate.hist) == NULL) {
838 		message("No next history item");
839 		return;
840 	}
841 
842 	ministate.editing = 0;
843 
844 	/* XXX the minibuffer line is never modified so this is fine */
845 	text = (char *)hist_cur(ministate.hist);
846 	buffer->current_line->parent->line = text;
847 	recompute_completions(0);
848 }
849 
850 void
851 cmd_previous_completion(struct buffer *buffer)
852 {
853 	if (in_minibuffer != MB_COMPREAD)
854 		return;
855 
856 	buffer = &ministate.compl.buffer;
857 	if (buffer->current_line == NULL)
858 		return;
859 
860 	buffer->current_line->parent->type = LINE_COMPL;
861 	if (!forward_line(buffer, -1))
862 		buffer->current_line->parent->type = LINE_COMPL;
863 	else
864 		buffer->current_line->parent->type = LINE_COMPL_CURRENT;
865 }
866 
867 void
868 cmd_next_completion(struct buffer *buffer)
869 {
870 	if (in_minibuffer != MB_COMPREAD)
871 		return;
872 
873 	buffer = &ministate.compl.buffer;
874 	if (buffer->current_line == NULL)
875 		return;
876 
877 	if (buffer->current_line->parent->type == LINE_COMPL_CURRENT) {
878 		buffer->current_line->parent->type = LINE_COMPL;
879 		forward_line(buffer, +1);
880 	}
881 
882 	if (buffer->current_line != NULL)
883 		buffer->current_line->parent->type = LINE_COMPL_CURRENT;
884 }
885 
886 void
887 cmd_insert_current_candidate(struct buffer *buffer)
888 {
889 	if (in_minibuffer != MB_COMPREAD)
890 		return;
891 
892 	minibuffer_insert_current_candidate();
893 }
894 
895 void
896 cmd_suspend_telescope(struct buffer *buffer)
897 {
898 	message("Zzz...");
899 	ui_suspend();
900 }
901 
902 void
903 cmd_toggle_pre_wrap(struct buffer *buffer)
904 {
905 	dont_wrap_pre = !dont_wrap_pre;
906 
907 	if (dont_wrap_pre)
908 		message("Don't wrap preformatted blocks");
909 	else
910 		message("Wrap preformatted blocks");
911 
912 	ui_schedule_redraw();
913 }
914 
915 void
916 cmd_mini_goto_beginning(struct buffer *buffer)
917 {
918 	struct vline *vl;
919 
920 	if (!in_minibuffer)
921 		return;
922 
923 	buffer = &ministate.compl.buffer;
924 
925 	if ((vl = buffer->current_line) != NULL)
926 		vl->parent->type = LINE_COMPL;
927 
928 	vl = TAILQ_FIRST(&buffer->head);
929 	while (vl != NULL && vl->parent->flags & L_HIDDEN)
930 		vl = TAILQ_NEXT(vl, vlines);
931 
932 	if (vl == NULL)
933 		return;
934 
935 	vl->parent->type = LINE_COMPL_CURRENT;
936 	buffer->top_line = vl;
937 	buffer->current_line = vl;
938 }
939 
940 void
941 cmd_mini_goto_end(struct buffer *buffer)
942 {
943 	struct vline *vl;
944 
945 	if (!in_minibuffer)
946 		return;
947 
948 	buffer = &ministate.compl.buffer;
949 
950 	if ((vl = buffer->current_line) != NULL)
951 		vl->parent->type = LINE_COMPL;
952 
953 	vl = TAILQ_LAST(&buffer->head, vhead);
954 	while (vl != NULL && vl->parent->flags & L_HIDDEN)
955 		vl = TAILQ_PREV(vl, vhead, vlines);
956 
957 	if (vl == NULL)
958 		return;
959 
960 	vl->parent->type = LINE_COMPL_CURRENT;
961 	buffer->current_line = vl;
962 }
963 
964 void
965 cmd_other_window(struct buffer *buffer)
966 {
967 	ui_other_window();
968 }
969 
970 void
971 cmd_mini_scroll_up(struct buffer *buffer)
972 {
973 	if (!in_minibuffer)
974 		return;
975 
976 	buffer = &ministate.compl.buffer;
977 	if (buffer->current_line == NULL)
978 		return;
979 
980 	buffer->current_line->parent->type = LINE_COMPL;
981 	cmd_scroll_up(buffer);
982 	buffer->current_line->parent->type = LINE_COMPL_CURRENT;
983 }
984 
985 void
986 cmd_mini_scroll_down(struct buffer *buffer)
987 {
988 	if (!in_minibuffer)
989 		return;
990 
991 	buffer = &ministate.compl.buffer;
992 	if (buffer->current_line == NULL)
993 		return;
994 
995 	buffer->current_line->parent->type = LINE_COMPL;
996 	cmd_scroll_down(buffer);
997 	buffer->current_line->parent->type = LINE_COMPL_CURRENT;
998 }
999 
1000 void
1001 cmd_toggle_downloads(struct buffer *buffer)
1002 {
1003 	ui_toggle_side_window(SIDE_WINDOW_BOTTOM);
1004 }
1005 
1006 void
1007 cmd_cache_info(struct buffer *buffer)
1008 {
1009 	size_t	npages, tot;
1010 	char	fmt[FMT_SCALED_STRSIZE];
1011 
1012 	mcache_info(&npages, &tot);
1013 
1014 	if (fmt_scaled(tot, fmt) == 0)
1015 		message("pages: %zu, total: %s", npages, fmt);
1016 	else
1017 		message("pages: %zu, total: %zu", npages, tot);
1018 }
1019 
1020 void
1021 cmd_reply_last_input(struct buffer *buffer)
1022 {
1023 	GUARD_RECURSIVE_MINIBUFFER();
1024 
1025 	if (current_tab->last_input_url == NULL) {
1026 		message("there was no previous input request in this tab");
1027 		return;
1028 	}
1029 
1030 	if (!strncmp(current_tab->last_input_url, "gopher", 6)) {
1031 		load_url_in_tab(current_tab, current_tab->last_input_url,
1032 		    NULL, LU_MODE_NOCACHE);
1033 		return;
1034 	}
1035 
1036 	message("%s", current_tab->last_input_url);
1037 	ui_require_input(current_tab, 0, ir_select_reply);
1038 }
1039 
1040 void
1041 cmd_write_buffer(struct buffer *buffer)
1042 {
1043 	const char *f, *url;
1044 	char path[PATH_MAX];
1045 
1046 	GUARD_RECURSIVE_MINIBUFFER();
1047 
1048 	if (safe_mode) {
1049 		message("Can't write buffer in safe-mode.");
1050 		return;
1051 	}
1052 
1053 	url = hist_cur(current_tab->hist);
1054 
1055 	if ((f = strrchr(url, '/')) != NULL)
1056 		f++;
1057 	if (f == NULL || *f == '\0') {
1058 		/* guess a decent file name based on the protocol used */
1059 		if (!strncmp(url, "gemini://", 9))
1060 			f = "index.gmi";
1061 		else
1062 			f = "index.txt";
1063 	}
1064 
1065 	strlcpy(path, download_path, sizeof(path));
1066 	strlcat(path, f, sizeof(path));
1067 
1068 	ui_read("Write file", write_buffer, current_tab, path);
1069 }
1070 
1071 void
1072 cmd_home(struct buffer *buffer)
1073 {
1074 	char path[GEMINI_URL_LEN];
1075 	char *tilde, *t;
1076 
1077 	strlcpy(path, current_tab->iri.iri_path, sizeof(path));
1078 
1079 	if ((tilde = strstr(path, "/~")) != NULL &&
1080 	    tilde[2] != '\0' && tilde[2] != '/') {
1081 		if ((t = strchr(tilde + 2, '/')) != NULL)
1082 			*++t = '\0';
1083 		load_url_in_tab(current_tab, path, NULL, LU_MODE_NOCACHE);
1084 	} else
1085 		cmd_root(buffer);
1086 }
1087 
1088 void
1089 cmd_root(struct buffer *buffer)
1090 {
1091 	load_url_in_tab(current_tab, "/", NULL, LU_MODE_NOCACHE);
1092 }
1093 
1094 void
1095 cmd_up(struct buffer *buffer)
1096 {
1097 	load_url_in_tab(current_tab, "..", NULL, LU_MODE_NOCACHE);
1098 }
1099 
1100 void
1101 cmd_use_certificate(struct buffer *buffer)
1102 {
1103 	GUARD_RECURSIVE_MINIBUFFER();
1104 
1105 	enter_minibuffer(sensible_self_insert, uc_select, exit_minibuffer,
1106 	    NULL, compl_uc, NULL, 1);
1107 	strlcpy(ministate.prompt, "Select certificate: ",
1108 	    sizeof(ministate.prompt));
1109 }
1110 
1111 void
1112 cmd_client_certificate_info(struct buffer *buffer)
1113 {
1114 	if (current_tab->client_cert)
1115 		message("Using certificate %s", current_tab->client_cert);
1116 	else
1117 		message("Not using any client certificate.");
1118 }
1119 
1120 static void
1121 unload_certificate_cb(int r, struct tab *tab)
1122 {
1123 	message("Won't use %s for this site.", tab->client_cert);
1124 	cert_delete_for(tab->client_cert, &tab->iri, r);
1125 }
1126 
1127 void
1128 cmd_unload_certificate(struct buffer *buffer)
1129 {
1130 	struct tab	*tab = current_tab;
1131 
1132 	GUARD_RECURSIVE_MINIBUFFER();
1133 
1134 	if (tab->client_cert == NULL) {
1135 		message("No client certificate in use!");
1136 		return;
1137 	}
1138 
1139 	if (tab->client_cert_temp) {
1140 		message("Won't use %s for this site.", tab->client_cert);
1141 		cert_delete_for(tab->client_cert, &tab->iri, 0);
1142 		return;
1143 	}
1144 
1145 	yornp("Unload only for the current session?", unload_certificate_cb,
1146 	    current_tab);
1147 }
1148 
1149 void
1150 cmd_search(struct buffer *buffer)
1151 {
1152 	GUARD_RECURSIVE_MINIBUFFER();
1153 
1154 	if (!strncmp(default_search_engine, "gopher://", 9)) {
1155 		load_url_in_tab(current_tab, default_search_engine, NULL,
1156 		    LU_MODE_NOCACHE);
1157 		return;
1158 	}
1159 
1160 	enter_minibuffer(sensible_self_insert, search_select, exit_minibuffer, NULL,
1161 	    NULL, NULL, 0);
1162 	strlcpy(ministate.prompt, "Search: ", sizeof(ministate.prompt));
1163 }