op public repos

Blob

Date:: Sat Mar 13 19:02:23 2021 UTC
Message:: show page title in tabs
Actions:: History | Blame | Raw File
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 /*
18  * Ncurses UI for telescope.
19  *
20  *
21  * Text wrapping
22  * =============
23  *
24  * There's a simple text wrapping algorithm.
25  *
26  * 1. if it's a line in a pre-formatted block:
27  *    a. hard wrap.
28  *    b. repeat
29  * 2. there is enough room for the next word?
30  *    a. yes: render it
31  *    b. no: break the current line.
32  *       i.  while there isn't enough space to draw the current
33  *           word, hard-wrap it
34  *       ii. draw the remainder of the current word (can be the
35  *           the entirely)
36  * 3. render the spaces after the word
37  *    a. but if there is not enough room break the line and
38  *       forget them
39  * 4. repeat
40  *
41  *
42  * Text scrolling
43  * ==============
44  *
45  * ncurses allows you to scroll a window, but when a line goes out of
46  * the visible area it's forgotten.  We keep a list of formatted lines
47  * (``visual lines'') that we know fits in the window, and draw them.
48  * This way is easy to scroll: just call wscrl and then render the
49  * first/last line!
50  *
51  * This means that on every resize we have to clear our list of lines
52  * and re-render everything.  A clever approach would be to do this
53  * ``on-demand''.
54  *
55  * TODO: make the text formatting on-demand.
56  *
57  */
58 
59 #include <telescope.h>
60 
61 #include <ctype.h>
62 #include <curses.h>
63 #include <event.h>
64 #include <locale.h>
65 #include <signal.h>
66 #include <stdarg.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <unistd.h>
70 
71 #define TAB_CURRENT	0x1
72 
73 struct minibuf_histhead;
74 
75 static struct event	stdioev, winchev;
76 
77 static void		 load_default_keys(void);
78 static int		 push_line(struct tab*, const struct line*, const char*, size_t, int);
79 static void		 empty_vlist(struct tab*);
80 static void		 restore_cursor(struct tab *);
81 
82 static void		 cmd_previous_line(struct tab*);
83 static void		 cmd_next_line(struct tab*);
84 static void		 cmd_forward_char(struct tab*);
85 static void		 cmd_backward_char(struct tab*);
86 static void		 cmd_move_beginning_of_line(struct tab*);
87 static void		 cmd_move_end_of_line(struct tab*);
88 static void		 cmd_redraw(struct tab*);
89 static void		 cmd_scroll_line_down(struct tab*);
90 static void		 cmd_scroll_line_up(struct tab*);
91 static void		 cmd_scroll_up(struct tab*);
92 static void		 cmd_scroll_down(struct tab*);
93 static void		 cmd_beginning_of_buffer(struct tab*);
94 static void		 cmd_end_of_buffer(struct tab*);
95 static void		 cmd_kill_telescope(struct tab*);
96 static void		 cmd_push_button(struct tab*);
97 static void		 cmd_push_button_new_tab(struct tab*);
98 static void		 cmd_clear_minibuf(struct tab*);
99 static void		 cmd_execute_extended_command(struct tab*);
100 static void		 cmd_tab_close(struct tab*);
101 static void		 cmd_tab_new(struct tab*);
102 static void		 cmd_tab_next(struct tab*);
103 static void		 cmd_tab_previous(struct tab*);
104 static void		 cmd_load_url(struct tab*);
105 static void		 cmd_load_current_url(struct tab*);
106 
107 static void		 global_key_unbound(void);
108 
109 static void		 cmd_mini_delete_char(struct tab*);
110 static void		 cmd_mini_delete_backward_char(struct tab*);
111 static void		 cmd_mini_forward_char(struct tab*);
112 static void		 cmd_mini_backward_char(struct tab*);
113 static void		 cmd_mini_move_end_of_line(struct tab*);
114 static void		 cmd_mini_move_beginning_of_line(struct tab*);
115 static void		 cmd_mini_kill_line(struct tab*);
116 static void		 cmd_mini_abort(struct tab*);
117 static void		 cmd_mini_complete_and_exit(struct tab*);
118 static void		 cmd_mini_previous_history_element(struct tab*);
119 static void		 cmd_mini_next_history_element(struct tab*);
120 
121 static void		 minibuffer_hist_save_entry(void);
122 static void		 minibuffer_taint_hist(void);
123 static void		 minibuffer_self_insert(void);
124 static void		 eecmd_self_insert(void);
125 static void		 eecmd_select(void);
126 static void		 ir_self_insert(void);
127 static void		 ir_select(void);
128 static void		 lu_self_insert(void);
129 static void		 lu_select(void);
130 
131 static struct line	*nth_line(struct tab*, size_t);
132 static struct tab	*current_tab(void);
133 static void		 dispatch_stdio(int, short, void*);
134 static void		 handle_clear_minibuf(int, short, void*);
135 static void		 handle_resize(int, short, void*);
136 static int		 word_bourdaries(const char*, const char*, const char**, const char**);
137 static void		 wrap_text(struct tab*, const char*, struct line*);
138 static int		 hardwrap_text(struct tab*, struct line*);
139 static int		 wrap_page(struct tab*);
140 static void		 print_line(struct line*);
141 static void		 redraw_tabline(void);
142 static void		 redraw_body(struct tab*);
143 static void		 redraw_modeline(struct tab*);
144 static void		 redraw_minibuffer(void);
145 static void		 redraw_tab(struct tab*);
146 static void		 message(const char*, ...) __attribute__((format(printf, 1, 2)));
147 static void		 start_loading_anim(struct tab*);
148 static void		 update_loading_anim(int, short, void*);
149 static void		 stop_loading_anim(struct tab*);
150 static void		 load_url_in_tab(struct tab*, const char*);
151 static void		 enter_minibuffer(void(*)(void), void(*)(void), void(*)(void), struct minibuf_histhead*);
152 static void		 exit_minibuffer(void);
153 static void		 switch_to_tab(struct tab*);
154 static struct tab	*new_tab(void);
155 
156 static struct { int meta, key; } thiskey;
157 
158 static WINDOW	*tabline, *body, *modeline, *minibuf;
159 static int	 body_lines, body_cols;
160 
161 static struct event	clminibufev;
162 static int		clminibufev_set;
163 static struct timeval	clminibufev_timer = { 5, 0 };
164 static struct timeval	loadingev_timer = { 0, 250000 };
165 
166 static uint32_t		 tab_counter;
167 
168 struct ui_state {
169 	int			curs_x;
170 	int			curs_y;
171 	size_t			line_off;
172 	size_t			line_max;
173 
174 	short			loading_anim;
175 	short			loading_anim_step;
176 	struct event		loadingev;
177 
178 	TAILQ_HEAD(, line)	head;
179 };
180 
181 static char	keybuf[64];
182 
183 struct kmap global_map,
184 	minibuffer_map,
185 	*current_map,
186 	*base_map;
187 
188 /* TODO: limit to a maximum number of entries */
189 struct minibuf_histhead {
190 	TAILQ_HEAD(mhisthead, minibuf_hist)	head;
191 	size_t					len;
192 };
193 struct minibuf_hist {
194 	char				h[1025];
195 	TAILQ_ENTRY(minibuf_hist)	entries;
196 };
197 
198 static struct minibuf_histhead eecmd_history,
199 	ir_history,
200 	lu_history;
201 
202 static int	in_minibuffer;
203 
204 static struct {
205 	char	*curmesg;
206 
207 	char	 buf[1025];
208 	size_t	 off, len;
209 	char	 prompt[32];
210 	void	 (*donefn)(void);
211 	void	 (*abortfn)(void);
212 
213 	struct minibuf_histhead	*history;
214 	struct minibuf_hist	*hist_cur;
215 	size_t			 hist_off;
216 } ministate;
217 
218 struct lineprefix {
219 	const char	*prfx1;
220 	const char	*prfx2;
221 } line_prefixes[] = {
222 	[LINE_TEXT] =		{ "",		"" },
223 	[LINE_LINK] =		{ "=> ",	"   " },
224 	[LINE_TITLE_1] =	{ "# ",		"  " },
225 	[LINE_TITLE_2] =	{ "## ",	"   " },
226 	[LINE_TITLE_3] =	{ "### ",	"    " },
227 	[LINE_ITEM] =		{ "* ",		"  " },
228 	[LINE_QUOTE] =		{ "> ",		"> " },
229 	[LINE_PRE_START] =	{ "```",	"```" },
230 	[LINE_PRE_CONTENT] =	{ "",		"" },
231 	[LINE_PRE_END] =	{ "```",	"```" },
232 };
233 
234 struct line_face {
235 	int prop;
236 } line_faces[] = {
237 	[LINE_TEXT] =		{ 0 },
238 	[LINE_LINK] =		{ A_UNDERLINE },
239 	[LINE_TITLE_1] =	{ A_BOLD },
240 	[LINE_TITLE_2] =	{ A_BOLD },
241 	[LINE_TITLE_3] =	{ A_BOLD },
242 	[LINE_ITEM] =		{ 0 },
243 	[LINE_QUOTE] =		{ A_DIM },
244 	[LINE_PRE_START] =	{ 0 },
245 	[LINE_PRE_CONTENT] =	{ 0 },
246 	[LINE_PRE_END] =	{ 0 },
247 };
248 
249 static inline void
250 global_set_key(const char *key, void (*fn)(struct tab*))
251 {
252 	if (!kmap_define_key(&global_map, key, fn))
253 		_exit(1);
254 }
255 
256 static inline void
257 minibuffer_set_key(const char *key, void (*fn)(struct tab*))
258 {
259 	if (!kmap_define_key(&minibuffer_map, key, fn))
260 		_exit(1);
261 }
262 
263 static void
264 load_default_keys(void)
265 {
266 	/* === global map === */
267 
268 	/* emacs */
269 	global_set_key("C-p",		cmd_previous_line);
270 	global_set_key("C-n",		cmd_next_line);
271 	global_set_key("C-f",		cmd_forward_char);
272 	global_set_key("C-b",		cmd_backward_char);
273 	global_set_key("C-a",		cmd_move_beginning_of_line);
274 	global_set_key("C-e",		cmd_move_end_of_line);
275 
276 	global_set_key("M-v",		cmd_scroll_up);
277 	global_set_key("C-v",		cmd_scroll_down);
278 	global_set_key("M-space",	cmd_scroll_up);
279 	global_set_key("space",		cmd_scroll_down);
280 
281 	global_set_key("C-x C-c",	cmd_kill_telescope);
282 
283 	global_set_key("C-g",		cmd_clear_minibuf);
284 
285 	global_set_key("M-x",		cmd_execute_extended_command);
286 	global_set_key("C-x C-f",	cmd_load_url);
287 	global_set_key("C-x M-f",	cmd_load_current_url);
288 
289 	global_set_key("C-x t 0",	cmd_tab_close);
290 	global_set_key("C-x t 2",	cmd_tab_new);
291 	global_set_key("C-x t o",	cmd_tab_next);
292 	global_set_key("C-x t O",	cmd_tab_previous);
293 
294 	global_set_key("M-<",		cmd_beginning_of_buffer);
295 	global_set_key("M->",		cmd_end_of_buffer);
296 
297 	/* vi/vi-like */
298 	global_set_key("k",		cmd_previous_line);
299 	global_set_key("j",		cmd_next_line);
300 	global_set_key("l",		cmd_forward_char);
301 	global_set_key("h",		cmd_backward_char);
302 	global_set_key("^",		cmd_move_beginning_of_line);
303 	global_set_key("$",		cmd_move_end_of_line);
304 
305 	global_set_key("K",		cmd_scroll_line_up);
306 	global_set_key("J",		cmd_scroll_line_down);
307 
308 	global_set_key("g g",		cmd_beginning_of_buffer);
309 	global_set_key("G",		cmd_end_of_buffer);
310 
311 	/* tmp */
312 	global_set_key("q",		cmd_kill_telescope);
313 
314 	global_set_key("esc",		cmd_clear_minibuf);
315 
316 	global_set_key(":",		cmd_execute_extended_command);
317 
318 	/* cua */
319 	global_set_key("<up>",		cmd_previous_line);
320 	global_set_key("<down>",	cmd_next_line);
321 	global_set_key("<right>",	cmd_forward_char);
322 	global_set_key("<left>",	cmd_backward_char);
323 	global_set_key("<prior>",	cmd_scroll_up);
324 	global_set_key("<next>",	cmd_scroll_down);
325 
326 	/* "ncurses standard" */
327 	global_set_key("C-l",		cmd_redraw);
328 
329 	/* global */
330 	global_set_key("C-m",		cmd_push_button);
331 	global_set_key("M-enter",	cmd_push_button_new_tab);
332 
333 	/* === minibuffer map === */
334 	minibuffer_set_key("ret",		cmd_mini_complete_and_exit);
335 	minibuffer_set_key("C-g",		cmd_mini_abort);
336 	minibuffer_set_key("esc",		cmd_mini_abort);
337 	minibuffer_set_key("C-d",		cmd_mini_delete_char);
338 	minibuffer_set_key("del",		cmd_mini_delete_backward_char);
339 
340 	minibuffer_set_key("C-f",		cmd_mini_forward_char);
341 	minibuffer_set_key("C-b",		cmd_mini_backward_char);
342 	minibuffer_set_key("<right>",		cmd_mini_forward_char);
343 	minibuffer_set_key("<left>",		cmd_mini_backward_char);
344 	minibuffer_set_key("C-e",		cmd_mini_move_end_of_line);
345 	minibuffer_set_key("C-a",		cmd_mini_move_beginning_of_line);
346 	minibuffer_set_key("<end>",		cmd_mini_move_end_of_line);
347 	minibuffer_set_key("<home>",		cmd_mini_move_beginning_of_line);
348 	minibuffer_set_key("C-k",		cmd_mini_kill_line);
349 
350 	minibuffer_set_key("M-p",		cmd_mini_previous_history_element);
351 	minibuffer_set_key("M-n",		cmd_mini_next_history_element);
352 	minibuffer_set_key("<up>",		cmd_mini_previous_history_element);
353 	minibuffer_set_key("<down>",		cmd_mini_next_history_element);
354 }
355 
356 static int
357 push_line(struct tab *tab, const struct line *l, const char *buf, size_t len, int cont)
358 {
359 	struct line *vl;
360 
361 	tab->s->line_max++;
362 
363 	if ((vl = calloc(1, sizeof(*vl))) == NULL)
364 		return 0;
365 
366 	if (len != 0 && (vl->line = calloc(1, len+1)) == NULL) {
367 		free(vl);
368 		return 0;
369 	}
370 
371 	vl->type = l->type;
372 	if (len != 0)
373 		memcpy(vl->line, buf, len);
374 	vl->alt = l->alt;
375 	vl->flags = cont;
376 
377 	if (TAILQ_EMPTY(&tab->s->head))
378 		TAILQ_INSERT_HEAD(&tab->s->head, vl, lines);
379 	else
380 		TAILQ_INSERT_TAIL(&tab->s->head, vl, lines);
381 	return 1;
382 }
383 
384 static void
385 empty_vlist(struct tab *tab)
386 {
387 	struct line *l, *t;
388 
389 	tab->s->line_max = 0;
390 
391 	TAILQ_FOREACH_SAFE(l, &tab->s->head, lines, t) {
392 		TAILQ_REMOVE(&tab->s->head, l, lines);
393 		free(l->line);
394 		/* l->alt references the original line! */
395 		free(l);
396 	}
397 }
398 
399 static void
400 restore_cursor(struct tab *tab)
401 {
402 	wmove(body, tab->s->curs_y, tab->s->curs_x);
403 }
404 
405 static void
406 cmd_previous_line(struct tab *tab)
407 {
408 	if (--tab->s->curs_y < 0) {
409 		tab->s->curs_y = 0;
410 		cmd_scroll_line_up(tab);
411 	}
412 
413 	restore_cursor(tab);
414 }
415 
416 static void
417 cmd_next_line(struct tab *tab)
418 {
419 	if (tab->s->line_off + tab->s->curs_y >= tab->s->line_max)
420 		return;
421 
422 	if (++tab->s->curs_y > body_lines-1) {
423 		tab->s->curs_y = body_lines-1;
424 		cmd_scroll_line_down(tab);
425 	}
426 
427 	restore_cursor(tab);
428 }
429 
430 static void
431 cmd_forward_char(struct tab *tab)
432 {
433 	tab->s->curs_x = MIN(body_cols-1, tab->s->curs_x+1);
434 	restore_cursor(tab);
435 }
436 
437 static void
438 cmd_backward_char(struct tab *tab)
439 {
440 	tab->s->curs_x = MAX(0, tab->s->curs_x-1);
441 	restore_cursor(tab);
442 }
443 
444 static void
445 cmd_move_beginning_of_line(struct tab *tab)
446 {
447 	tab->s->curs_x = 0;
448 	restore_cursor(tab);
449 }
450 
451 static void
452 cmd_move_end_of_line(struct tab *tab)
453 {
454 	struct line	*line;
455 	size_t		 off;
456 	const char	*prfx;
457 
458 	off = tab->s->line_off + tab->s->curs_y;
459 	if (off >= tab->s->line_max) {
460 		tab->s->curs_x = 0;
461 		goto end;
462 	}
463 
464 	line = nth_line(tab, off);
465 	if (line->line != NULL)
466 		tab->s->curs_x = strlen(line->line);
467 	else
468 		tab->s->curs_x = 0;
469 
470 	prfx = line_prefixes[line->type].prfx1;
471 	tab->s->curs_x += strlen(prfx);
472 
473 end:
474 	restore_cursor(tab);
475 }
476 
477 static void
478 cmd_redraw(struct tab *tab)
479 {
480 	handle_resize(0, 0, NULL);
481 }
482 
483 static void
484 cmd_scroll_line_up(struct tab *tab)
485 {
486 	struct line	*l;
487 
488 	if (tab->s->line_off == 0)
489 		return;
490 
491 	l = nth_line(tab, --tab->s->line_off);
492 	wscrl(body, -1);
493 	wmove(body, 0, 0);
494 	print_line(l);
495 }
496 
497 static void
498 cmd_scroll_line_down(struct tab *tab)
499 {
500 	struct line	*l;
501 	size_t		 n;
502 
503 	if (tab->s->line_max == 0 || tab->s->line_off == tab->s->line_max-1)
504 		return;
505 
506 	tab->s->line_off++;
507 	wscrl(body, 1);
508 
509 	if (tab->s->line_max - tab->s->line_off < body_lines)
510 		return;
511 
512 	l = nth_line(tab, tab->s->line_off + body_lines-1);
513 	wmove(body, body_lines-1, 0);
514 	print_line(l);
515 }
516 
517 static void
518 cmd_scroll_up(struct tab *tab)
519 {
520 	size_t off;
521 
522 	off = body_lines+1;
523 
524 	for (; off > 0; --off)
525 		cmd_scroll_line_up(tab);
526 }
527 
528 static void
529 cmd_scroll_down(struct tab *tab)
530 {
531 	size_t off;
532 
533 	off = body_lines+1;
534 
535 	for (; off > 0; --off)
536 		cmd_scroll_line_down(tab);
537 }
538 
539 static void
540 cmd_beginning_of_buffer(struct tab *tab)
541 {
542 	tab->s->line_off = 0;
543 	tab->s->curs_y = 0;
544 	redraw_body(tab);
545 }
546 
547 static void
548 cmd_end_of_buffer(struct tab *tab)
549 {
550 	ssize_t off;
551 
552 	off = tab->s->line_max - body_lines;
553 	off = MAX(0, off);
554 
555 	tab->s->line_off = off;
556 	tab->s->curs_y = MIN(body_lines, tab->s->line_max);
557 
558 	redraw_body(tab);
559 }
560 
561 static void
562 cmd_kill_telescope(struct tab *tab)
563 {
564 	event_loopbreak();
565 }
566 
567 static void
568 cmd_push_button(struct tab *tab)
569 {
570 	struct line	*l;
571 	size_t		 nth;
572 
573 	nth = tab->s->line_off + tab->s->curs_y;
574 	if (nth >= tab->s->line_max)
575 		return;
576 	l = nth_line(tab, nth);
577 	if (l->type != LINE_LINK)
578 		return;
579 
580 	load_url_in_tab(tab, l->alt);
581 }
582 
583 static void
584 cmd_push_button_new_tab(struct tab *tab)
585 {
586 	struct tab	*t;
587 	struct line	*l;
588 	size_t		 nth;
589 
590 	nth = tab->s->line_off + tab->s->curs_y;
591 	if (nth > tab->s->line_max)
592 		return;
593 	l = nth_line(tab, nth);
594 	if (l->type != LINE_LINK)
595 		return;
596 
597 	t = new_tab();
598 	memcpy(&t->url, &tab->url, sizeof(tab->url));
599 	memcpy(&t->urlstr, &tab->urlstr, sizeof(tab->urlstr));
600 	load_url_in_tab(t, l->alt);
601 }
602 
603 static void
604 cmd_clear_minibuf(struct tab *tab)
605 {
606 	handle_clear_minibuf(0, 0, NULL);
607 }
608 
609 static void
610 cmd_execute_extended_command(struct tab *tab)
611 {
612 	size_t	 len;
613 
614 	enter_minibuffer(eecmd_self_insert, eecmd_select, exit_minibuffer,
615 	    &eecmd_history);
616 
617 	len = sizeof(ministate.prompt);
618 	strlcpy(ministate.prompt, "", len);
619 
620 	if (thiskey.meta)
621 		strlcat(ministate.prompt, "M-", len);
622 
623 	strlcat(ministate.prompt, keyname(thiskey.key), len);
624 	strlcat(ministate.prompt, " ", len);
625 }
626 
627 static void
628 cmd_tab_close(struct tab *tab)
629 {
630 	struct tab *t;
631 
632 	if (TAILQ_PREV(tab, tabshead, tabs) == NULL &&
633 	    TAILQ_NEXT(tab, tabs) == NULL) {
634 		message("Can't close the only tab.");
635 		return;
636 	}
637 
638 	stop_tab(tab);
639 
640 	t = TAILQ_PREV(tab, tabshead, tabs);
641 	t->flags |= TAB_CURRENT;
642 
643 	TAILQ_REMOVE(&tabshead, tab, tabs);
644 
645 	free(tab->s);
646 	free(tab);
647 }
648 
649 static void
650 cmd_tab_new(struct tab *tab)
651 {
652 	new_tab();
653 }
654 
655 static void
656 cmd_tab_next(struct tab *tab)
657 {
658 	struct tab *t;
659 
660 	tab->flags &= ~TAB_CURRENT;
661 
662 	if ((t = TAILQ_NEXT(tab, tabs)) == NULL)
663 		t = TAILQ_FIRST(&tabshead);
664 	t->flags |= TAB_CURRENT;
665 }
666 
667 static void
668 cmd_tab_previous(struct tab *tab)
669 {
670 	struct tab *t;
671 
672 	tab->flags &= ~TAB_CURRENT;
673 
674 	if ((t = TAILQ_PREV(tab, tabshead, tabs)) == NULL)
675 		t = TAILQ_LAST(&tabshead, tabshead);
676 	t->flags |= TAB_CURRENT;
677 }
678 
679 static void
680 cmd_load_url(struct tab *tab)
681 {
682 	enter_minibuffer(lu_self_insert, lu_select, exit_minibuffer,
683 	    &lu_history);
684 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
685 }
686 
687 static void
688 cmd_load_current_url(struct tab *tab)
689 {
690 	enter_minibuffer(lu_self_insert, lu_select, exit_minibuffer,
691 	    &lu_history);
692 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
693 	strlcpy(ministate.buf, tab->urlstr, sizeof(ministate.buf));
694 	ministate.off = strlen(tab->urlstr);
695 	ministate.len = ministate.off;
696 }
697 
698 static void
699 global_key_unbound(void)
700 {
701 	message("%s is undefined", keybuf);
702 }
703 
704 static void
705 cmd_mini_delete_char(struct tab *tab)
706 {
707 	minibuffer_taint_hist();
708 
709 	if (ministate.len == 0 || ministate.off == ministate.len)
710 		return;
711 
712 	memmove(&ministate.buf[ministate.off],
713 	    &ministate.buf[ministate.off+1],
714 	    ministate.len - ministate.off + 1);
715 	ministate.len--;
716 }
717 
718 static void
719 cmd_mini_delete_backward_char(struct tab *tab)
720 {
721 	minibuffer_taint_hist();
722 
723 	if (ministate.len == 0 || ministate.off == 0)
724 		return;
725 
726 	memmove(&ministate.buf[ministate.off-1],
727 	    &ministate.buf[ministate.off],
728 	    ministate.len - ministate.off + 1);
729 	ministate.off--;
730 	ministate.len--;
731 }
732 
733 static void
734 cmd_mini_forward_char(struct tab *tab)
735 {
736 	if (ministate.off == ministate.len)
737 		return;
738 	ministate.off++;
739 }
740 
741 static void
742 cmd_mini_backward_char(struct tab *tab)
743 {
744 	if (ministate.off == 0)
745 		return;
746 	ministate.off--;
747 }
748 
749 static void
750 cmd_mini_move_end_of_line(struct tab *tab)
751 {
752 	ministate.off = ministate.len;
753 }
754 
755 static void
756 cmd_mini_move_beginning_of_line(struct tab *tab)
757 {
758 	ministate.off = 0;
759 }
760 
761 static void
762 cmd_mini_kill_line(struct tab *tab)
763 {
764 	minibuffer_taint_hist();
765 
766         if (ministate.off == ministate.len)
767 		return;
768 	ministate.buf[ministate.off] = '\0';
769 	ministate.len -= ministate.off;
770 }
771 
772 static void
773 cmd_mini_abort(struct tab *tab)
774 {
775         ministate.abortfn();
776 }
777 
778 static void
779 cmd_mini_complete_and_exit(struct tab *tab)
780 {
781 	minibuffer_taint_hist();
782 	ministate.donefn();
783 }
784 
785 static void
786 cmd_mini_previous_history_element(struct tab *tab)
787 {
788 	if (ministate.history == NULL) {
789 		message("No history");
790 		return;
791 	}
792 
793 	if (ministate.hist_cur == NULL ||
794 	    (ministate.hist_cur = TAILQ_PREV(ministate.hist_cur, mhisthead, entries)) == NULL) {
795 		ministate.hist_cur = TAILQ_LAST(&ministate.history->head, mhisthead);
796 		ministate.hist_off = ministate.history->len - 1;
797 		if (ministate.hist_cur == NULL)
798 			message("No prev item");
799 	} else {
800 		ministate.hist_off--;
801 	}
802 
803 	if (ministate.hist_cur != NULL) {
804 		ministate.off = 0;
805 		ministate.len = strlen(ministate.hist_cur->h);
806 	}
807 }
808 
809 static void
810 cmd_mini_next_history_element(struct tab *tab)
811 {
812 	if (ministate.history == NULL) {
813 		message("No history");
814 		return;
815 	}
816 
817 	if (ministate.hist_cur == NULL ||
818 	    (ministate.hist_cur = TAILQ_NEXT(ministate.hist_cur, entries)) == NULL) {
819 		ministate.hist_cur = TAILQ_FIRST(&ministate.history->head);
820 		ministate.hist_off = 0;
821 		if (ministate.hist_cur == NULL)
822 			message("No next item");
823 	} else {
824 		ministate.hist_off++;
825 	}
826 
827 	if (ministate.hist_cur != NULL) {
828 		ministate.off = 0;
829 		ministate.len = strlen(ministate.hist_cur->h);
830 	}
831 }
832 
833 static void
834 minibuffer_hist_save_entry(void)
835 {
836 	struct minibuf_hist	*hist;
837 
838 	if (ministate.history == NULL)
839 		return;
840 
841 	if ((hist = calloc(1, sizeof(*hist))) == NULL)
842 		abort();
843 
844 	strlcpy(hist->h, ministate.buf, sizeof(hist->h));
845 
846 	if (TAILQ_EMPTY(&ministate.history->head))
847 		TAILQ_INSERT_HEAD(&ministate.history->head, hist, entries);
848 	else
849 		TAILQ_INSERT_TAIL(&ministate.history->head, hist, entries);
850 	ministate.history->len++;
851 }
852 
853 /*
854  * taint the minibuffer cache: if we're currently showing a history
855  * element, copy that to the current buf and reset the "history
856  * navigation" thing.
857  */
858 static void
859 minibuffer_taint_hist(void)
860 {
861 	if (ministate.hist_cur == NULL)
862 		return;
863 
864 	strlcpy(ministate.buf, ministate.hist_cur->h, sizeof(ministate.buf));
865 	ministate.hist_cur = NULL;
866 }
867 
868 static void
869 minibuffer_self_insert(void)
870 {
871 	minibuffer_taint_hist();
872 
873 	if (ministate.len == sizeof(ministate.buf) -1)
874 		return;
875 
876 	/* TODO: utf8 handling! */
877 
878 	memmove(&ministate.buf[ministate.off+1],
879 	    &ministate.buf[ministate.off],
880 	    ministate.len - ministate.off + 1);
881 	ministate.buf[ministate.off] = thiskey.key;
882 	ministate.off++;
883 	ministate.len++;
884 }
885 
886 static void
887 eecmd_self_insert(void)
888 {
889 	if (thiskey.meta || isspace(thiskey.key) ||
890 	    !isgraph(thiskey.key)) {
891 		global_key_unbound();
892 		return;
893 	}
894 
895 	minibuffer_self_insert();
896 }
897 
898 static void
899 eecmd_select(void)
900 {
901 	exit_minibuffer();
902 	minibuffer_hist_save_entry();
903 	message("TODO: try to execute %s", ministate.buf);
904 }
905 
906 static void
907 ir_self_insert(void)
908 {
909 	minibuffer_self_insert();
910 }
911 
912 static void
913 ir_select(void)
914 {
915 	char		 buf[1025] = {0};
916 	struct url	 url;
917 	struct tab	*tab;
918 
919 	tab = current_tab();
920 
921 	exit_minibuffer();
922 	minibuffer_hist_save_entry();
923 
924 	/* a bit ugly but... */
925 	memcpy(&url, &tab->url, sizeof(tab->url));
926 	url_set_query(&url, ministate.buf);
927 	url_unparse(&url, buf, sizeof(buf));
928 	load_url_in_tab(tab, buf);
929 }
930 
931 static void
932 lu_self_insert(void)
933 {
934 	if (thiskey.meta || isspace(thiskey.key) ||
935 	    !isgraph(thiskey.key)) {
936 		global_key_unbound();
937 		return;
938 	}
939 
940 	minibuffer_self_insert();
941 }
942 
943 static void
944 lu_select(void)
945 {
946 	exit_minibuffer();
947 	minibuffer_hist_save_entry();
948 	load_url_in_tab(current_tab(), ministate.buf);
949 }
950 
951 static struct line *
952 nth_line(struct tab *tab, size_t n)
953 {
954 	struct line	*l;
955 	size_t		 i;
956 
957 	i = 0;
958 	TAILQ_FOREACH(l, &tab->s->head, lines) {
959 		if (i == n)
960 			return l;
961 		i++;
962 	}
963 
964 	/* unreachable */
965 	abort();
966 }
967 
968 static struct tab *
969 current_tab(void)
970 {
971 	struct tab *t;
972 
973 	TAILQ_FOREACH(t, &tabshead, tabs) {
974 		if (t->flags & TAB_CURRENT)
975 			return t;
976 	}
977 
978 	/* unreachable */
979 	abort();
980 }
981 
982 static void
983 dispatch_stdio(int fd, short ev, void *d)
984 {
985 	struct tab	*tab;
986 	struct keymap	*k;
987 	const char	*keyname;
988 	char		 tmp[2] = {0};
989 
990 	thiskey.key = wgetch(body);
991 	if (thiskey.key == ERR)
992 		return;
993 	if (thiskey.key == 27) {
994 		/* TODO: make escape-time customizable */
995 
996 		thiskey.meta = 1;
997 		thiskey.key = wgetch(body);
998 		if (thiskey.key == ERR || thiskey.key == 27) {
999 			thiskey.meta = 0;
1000 			thiskey.key = 27;
1001 		}
1002 	} else
1003 		thiskey.meta = 0;
1004 
1005 	if (keybuf[0] != '\0')
1006 		strlcat(keybuf, " ", sizeof(keybuf));
1007 	if (thiskey.meta)
1008 		strlcat(keybuf, "M-", sizeof(keybuf));
1009 	if ((keyname = unkbd(thiskey.key)) != NULL)
1010 		strlcat(keybuf, keyname, sizeof(keybuf));
1011 	else {
1012 		tmp[0] = thiskey.key;
1013 		strlcat(keybuf, tmp, sizeof(keybuf));
1014 	}
1015 
1016 	TAILQ_FOREACH(k, &current_map->m, keymaps) {
1017 		if (k->meta == thiskey.meta &&
1018 		    k->key == thiskey.key) {
1019 			if (k->fn == NULL)
1020 				current_map = &k->map;
1021 			else {
1022 				current_map = base_map;
1023 				strlcpy(keybuf, "", sizeof(keybuf));
1024 				k->fn(current_tab());
1025 			}
1026 			goto done;
1027 		}
1028 	}
1029 
1030 	if (current_map->unhandled_input != NULL)
1031 		current_map->unhandled_input();
1032 	else {
1033 		global_key_unbound();
1034 	}
1035 
1036 	strlcpy(keybuf, "", sizeof(keybuf));
1037 	current_map = base_map;
1038 
1039 done:
1040 	redraw_tab(current_tab());
1041 }
1042 
1043 static void
1044 handle_clear_minibuf(int fd, short ev, void *d)
1045 {
1046 	clminibufev_set = 0;
1047 
1048 	free(ministate.curmesg);
1049 	ministate.curmesg = NULL;
1050 
1051 	redraw_minibuffer();
1052 	if (in_minibuffer) {
1053 		wrefresh(body);
1054 		wrefresh(minibuf);
1055 	} else {
1056 		wrefresh(minibuf);
1057 		wrefresh(body);
1058 	}
1059 }
1060 
1061 static void
1062 handle_resize(int sig, short ev, void *d)
1063 {
1064 	struct tab	*tab;
1065 
1066 	endwin();
1067 	refresh();
1068 	clear();
1069 
1070 	/* move and resize the windows, in reverse order! */
1071 
1072 	mvwin(minibuf, LINES-1, 0);
1073 	wresize(minibuf, 1, COLS);
1074 
1075 	mvwin(modeline, LINES-2, 0);
1076 	wresize(modeline, 1, COLS);
1077 
1078 	wresize(body, LINES-3, COLS);
1079 	body_lines = LINES-3;
1080 	body_cols = COLS;
1081 
1082 	wresize(tabline, 1, COLS);
1083 
1084 	tab = current_tab();
1085 
1086 	wrap_page(tab);
1087 	redraw_tab(tab);
1088 }
1089 
1090 /*
1091  * Helper function for wrap_text.  Find the end of the current word
1092  * and the end of the separator after the word.
1093  */
1094 static int
1095 word_boundaries(const char *s, const char *sep, const char **endword, const char **endspc)
1096 {
1097 	*endword = s;
1098 	*endword = s;
1099 
1100 	if (*s == '\0')
1101 		return 0;
1102 
1103 	/* find the end of the current world */
1104 	for (; *s != '\0'; ++s) {
1105 		if (strchr(sep, *s) != NULL)
1106 			break;
1107 	}
1108 
1109 	*endword = s;
1110 
1111 	/* find the end of the separator */
1112 	for (; *s != '\0'; ++s) {
1113 		if (strchr(sep, *s) == NULL)
1114 			break;
1115 	}
1116 
1117 	*endspc = s;
1118 
1119 	return 1;
1120 }
1121 
1122 static inline int
1123 emitline(struct tab *tab, size_t zero, size_t *off, const struct line *l,
1124     const char **line, int *cont)
1125 {
1126 	if (!push_line(tab, l, *line, *off - zero, *cont))
1127 		return 0;
1128 	if (!*cont)
1129 		*cont = 1;
1130 	*line += *off - zero;
1131 	*off = zero;
1132 	return 1;
1133 }
1134 
1135 static inline void
1136 emitstr(const char **s, size_t len, size_t *off)
1137 {
1138 	size_t i;
1139 
1140 	/* printw("%*s", ...) doesn't seem to respect the precision, so... */
1141 	for (i = 0; i < len; ++i)
1142 		addch((*s)[i]);
1143 	*off += len;
1144 	*s += len;
1145 }
1146 
1147 /*
1148  * Build a list of visual line by wrapping the given line, assuming
1149  * that when printed will have a leading prefix prfx.
1150  *
1151  * TODO: it considers each byte one cell on the screen!
1152  */
1153 static void
1154 wrap_text(struct tab *tab, const char *prfx, struct line *l)
1155 {
1156 	size_t		 zero, off, len, split;
1157 	int		 cont = 0;
1158 	const char	*endword, *endspc, *line, *linestart;
1159 
1160 	zero = strlen(prfx);
1161 	off = zero;
1162 	line = l->line;
1163 	linestart = l->line;
1164 
1165 	while (word_boundaries(line, " \t-", &endword, &endspc)) {
1166 		len = endword - line;
1167 		if (off + len >= body_cols) {
1168 			emitline(tab, zero, &off, l, &linestart, &cont);
1169 			while (len >= body_cols) {
1170 				/* hard wrap */
1171 				emitline(tab, zero, &off, l, &linestart, &cont);
1172 				len -= body_cols-1;
1173 				line += body_cols-1;
1174 			}
1175 
1176 			if (len != 0)
1177 				off += len;
1178 		} else
1179 			off += len;
1180 
1181 		/* print the spaces iff not at bol */
1182 		len = endspc - endword;
1183 		/* line = endspc; */
1184 		if (off != zero) {
1185 			if (off + len >= body_cols) {
1186 				emitline(tab, zero, &off, l, &linestart, &cont);
1187 				linestart = endspc;
1188 			} else
1189 				off += len;
1190 		}
1191 
1192 		line = endspc;
1193 	}
1194 
1195 	emitline(tab, zero, &off, l, &linestart, &cont);
1196 }
1197 
1198 static int
1199 hardwrap_text(struct tab *tab, struct line *l)
1200 {
1201 	size_t		 off, len;
1202 	int		 cont;
1203 	const char	*linestart;
1204 
1205 	if (l->line == NULL)
1206 		return emitline(tab, 0, &off, l, &linestart, &cont);
1207 
1208         len = strlen(l->line);
1209 	off = 0;
1210 	linestart = l->line;
1211 
1212 	while (len >= COLS) {
1213 		len -= COLS-1;
1214 		off = COLS-1;
1215 		if (!emitline(tab, 0, &off, l, &linestart, &cont))
1216 			return 0;
1217 	}
1218 
1219 	if (len != 0)
1220 		return emitline(tab, 0, &len, l, &linestart, &cont);
1221 
1222 	return 1;
1223 }
1224 
1225 static int
1226 wrap_page(struct tab *tab)
1227 {
1228 	struct line	*l;
1229 	const char	*prfx;
1230 
1231 	empty_vlist(tab);
1232 
1233 	TAILQ_FOREACH(l, &tab->page.head, lines) {
1234 		prfx = line_prefixes[l->type].prfx1;
1235 		switch (l->type) {
1236 		case LINE_TEXT:
1237 		case LINE_LINK:
1238 		case LINE_TITLE_1:
1239 		case LINE_TITLE_2:
1240 		case LINE_TITLE_3:
1241 		case LINE_ITEM:
1242 		case LINE_QUOTE:
1243 			wrap_text(tab, prfx, l);
1244 			break;
1245 		case LINE_PRE_START:
1246 		case LINE_PRE_END:
1247                         push_line(tab, l, NULL, 0, 0);
1248 			break;
1249 		case LINE_PRE_CONTENT:
1250                         hardwrap_text(tab, l);
1251 			break;
1252 		}
1253 	}
1254 	return 1;
1255 }
1256 
1257 static inline void
1258 print_line(struct line *l)
1259 {
1260 	const char *text = l->line;
1261 	const char *prfx;
1262 	int face = line_faces[l->type].prop;
1263 
1264 	if (!l->flags)
1265 		prfx = line_prefixes[l->type].prfx1;
1266 	else
1267 		prfx = line_prefixes[l->type].prfx2;
1268 
1269 	if (text == NULL)
1270 		text = "";
1271 
1272 	if (face != 0)
1273 		wattron(body, face);
1274 	wprintw(body, "%s%s", prfx, text);
1275 	if (face != 0)
1276 		wattroff(body, face);
1277 }
1278 
1279 static void
1280 redraw_tabline(void)
1281 {
1282 	struct tab	*tab;
1283 	int		 current;
1284 	const char	*title;
1285 
1286 	werase(tabline);
1287 	wbkgd(tabline, A_REVERSE);
1288 
1289 	wprintw(tabline, " ");
1290 	TAILQ_FOREACH(tab, &tabshead, tabs) {
1291 		current = tab->flags & TAB_CURRENT;
1292 
1293 		if (*(title = tab->page.title) == '\0')
1294 			title = tab->urlstr;
1295 
1296 		if (current)
1297 			wattron(tabline, A_UNDERLINE);
1298 
1299 		wprintw(tabline, "%s%d: %s",
1300 		    current ? "*" : " ", tab->id, title);
1301 
1302 		if (current)
1303 			wattroff(tabline, A_UNDERLINE);
1304 	}
1305 }
1306 
1307 static void
1308 redraw_modeline(struct tab *tab)
1309 {
1310 	double		 pct;
1311 	int		 x, y, max_x, max_y;
1312 	const char	*mode = tab->page.name;
1313 	const char	*spin = "-\\|/";
1314 
1315 	werase(modeline);
1316 	wattron(modeline, A_REVERSE);
1317 	wmove(modeline, 0, 0);
1318 
1319 	wprintw(modeline, "-%c %s-mode ",
1320 	    spin[tab->s->loading_anim_step], mode);
1321 
1322 	pct = (tab->s->line_off + tab->s->curs_y) * 100.0 / tab->s->line_max;
1323 
1324 	if (tab->s->line_max <= body_lines)
1325                 wprintw(modeline, "All ");
1326 	else if (tab->s->line_off == 0)
1327                 wprintw(modeline, "Top ");
1328 	else if (tab->s->line_off + body_lines >= tab->s->line_max)
1329 		wprintw(modeline, "Bottom ");
1330 	else
1331 		wprintw(modeline, "%.0f%% ", pct);
1332 
1333 	wprintw(modeline, "%d/%d %s ",
1334 	    tab->s->line_off + tab->s->curs_y,
1335 	    tab->s->line_max,
1336 	    tab->urlstr);
1337 
1338 	getyx(modeline, y, x);
1339 	getmaxyx(modeline, max_y, max_x);
1340 
1341 	(void)y;
1342 	(void)max_y;
1343 
1344 	for (; x < max_x; ++x)
1345 		waddstr(modeline, "-");
1346 }
1347 
1348 static void
1349 redraw_minibuffer(void)
1350 {
1351 	size_t skip = 0, off_x = 0, off_y = 0;
1352 
1353 	werase(minibuf);
1354 	if (in_minibuffer) {
1355 		mvwprintw(minibuf, 0, 0, "%s", ministate.prompt);
1356 		if (ministate.hist_cur != NULL)
1357 			wprintw(minibuf, "(%zu/%zu) ",
1358 			    ministate.hist_off + 1,
1359 			    ministate.history->len);
1360 
1361 		getyx(minibuf, off_y, off_x);
1362 
1363 		while (ministate.off - skip > COLS / 2) {
1364 			skip += MIN(ministate.off/4, 1);
1365 		}
1366 
1367 		if (ministate.hist_cur != NULL)
1368 			wprintw(minibuf, "%s", ministate.hist_cur->h + skip);
1369 		else
1370 			wprintw(minibuf, "%s", ministate.buf + skip);
1371 	}
1372 
1373 	if (ministate.curmesg != NULL) {
1374 		if (in_minibuffer)
1375 			wprintw(minibuf, "  [%s]", ministate.curmesg);
1376 		else
1377 			wprintw(minibuf, "%s", ministate.curmesg);
1378 	}
1379 
1380 	if (!in_minibuffer && ministate.curmesg == NULL)
1381 		wprintw(minibuf, "%s", keybuf);
1382 
1383 	if (in_minibuffer)
1384 		wmove(minibuf, 0, off_x + ministate.off - skip);
1385 }
1386 
1387 static void
1388 redraw_tab(struct tab *tab)
1389 {
1390 	redraw_tabline();
1391 	redraw_body(tab);
1392 	redraw_modeline(tab);
1393 	redraw_minibuffer();
1394 
1395 	restore_cursor(tab);
1396 	wrefresh(tabline);
1397 	wrefresh(modeline);
1398 
1399 	if (in_minibuffer) {
1400 		wrefresh(body);
1401 		wrefresh(minibuf);
1402 	} else {
1403 		wrefresh(minibuf);
1404 		wrefresh(body);
1405 	}
1406 }
1407 
1408 static void
1409 redraw_body(struct tab *tab)
1410 {
1411 	struct line	*l;
1412 	int		 line;
1413 
1414 	werase(body);
1415 
1416 	tab->s->line_off = MIN(tab->s->line_max, tab->s->line_off);
1417 	if (TAILQ_EMPTY(&tab->s->head))
1418 		return;
1419 
1420 	line = 0;
1421 	l = nth_line(tab, tab->s->line_off);
1422 	for (; l != NULL; l = TAILQ_NEXT(l, lines)) {
1423 		wmove(body, line, 0);
1424 		print_line(l);
1425 		line++;
1426 		if (line == body_lines)
1427 			break;
1428 	}
1429 }
1430 
1431 static void
1432 message(const char *fmt, ...)
1433 {
1434 	va_list ap;
1435 
1436 	if (clminibufev_set)
1437 		evtimer_del(&clminibufev);
1438 	evtimer_set(&clminibufev, handle_clear_minibuf, NULL);
1439 	evtimer_add(&clminibufev, &clminibufev_timer);
1440 	clminibufev_set = 1;
1441 
1442 	free(ministate.curmesg);
1443 
1444 	va_start(ap, fmt);
1445 	/* TODO: what to do if the allocation fails here? */
1446 	if (vasprintf(&ministate.curmesg, fmt, ap) == -1)
1447 		ministate.curmesg = NULL;
1448 	va_end(ap);
1449 
1450 	redraw_minibuffer();
1451 
1452 	if (in_minibuffer) {
1453 		wrefresh(body);
1454 		wrefresh(minibuf);
1455 	} else {
1456 		wrefresh(minibuf);
1457 		wrefresh(body);
1458 	}
1459 }
1460 
1461 static void
1462 start_loading_anim(struct tab *tab)
1463 {
1464 	if (tab->s->loading_anim)
1465 		return;
1466 	tab->s->loading_anim = 1;
1467 	evtimer_set(&tab->s->loadingev, update_loading_anim, tab);
1468 	evtimer_add(&tab->s->loadingev, &loadingev_timer);
1469 }
1470 
1471 static void
1472 update_loading_anim(int fd, short ev, void *d)
1473 {
1474 	struct tab	*tab = d;
1475 
1476 	tab->s->loading_anim_step = (tab->s->loading_anim_step+1)%4;
1477 
1478 	redraw_modeline(tab);
1479 	wrefresh(modeline);
1480 
1481 	wrefresh(body);
1482 	if (in_minibuffer)
1483 		wrefresh(minibuf);
1484 
1485 	evtimer_add(&tab->s->loadingev, &loadingev_timer);
1486 }
1487 
1488 static void
1489 stop_loading_anim(struct tab *tab)
1490 {
1491 	if (!tab->s->loading_anim)
1492 		return;
1493 	evtimer_del(&tab->s->loadingev);
1494 	tab->s->loading_anim = 0;
1495 	tab->s->loading_anim_step = 0;
1496 
1497 	redraw_modeline(tab);
1498 
1499 	wrefresh(modeline);
1500 	wrefresh(body);
1501 	if (in_minibuffer)
1502 		wrefresh(minibuf);
1503 }
1504 
1505 static void
1506 load_url_in_tab(struct tab *tab, const char *url)
1507 {
1508 	empty_vlist(tab);
1509 	message("Loading %s...", url);
1510 	start_loading_anim(tab);
1511 	load_url(tab, url);
1512 
1513 	tab->s->curs_x = 0;
1514 	tab->s->curs_y = 0;
1515 	redraw_tab(tab);
1516 }
1517 
1518 static void
1519 enter_minibuffer(void (*self_insert_fn)(void), void (*donefn)(void),
1520     void (*abortfn)(void), struct minibuf_histhead *hist)
1521 {
1522 	in_minibuffer = 1;
1523 	base_map = &minibuffer_map;
1524 	current_map = &minibuffer_map;
1525 
1526 	base_map->unhandled_input = self_insert_fn;
1527 
1528 	ministate.donefn = donefn;
1529 	ministate.abortfn = abortfn;
1530 	memset(ministate.buf, 0, sizeof(ministate.buf));
1531         ministate.off = 0;
1532 	ministate.len = 0;
1533 	strlcpy(ministate.buf, "", sizeof(ministate.prompt));
1534 
1535 	ministate.history = hist;
1536 	ministate.hist_cur = NULL;
1537 	ministate.hist_off = 0;
1538 }
1539 
1540 static void
1541 exit_minibuffer(void)
1542 {
1543 	werase(minibuf);
1544 
1545 	in_minibuffer = 0;
1546 	base_map = &global_map;
1547 	current_map = &global_map;
1548 }
1549 
1550 static void
1551 switch_to_tab(struct tab *tab)
1552 {
1553 	struct tab	*t;
1554 
1555 	TAILQ_FOREACH(t, &tabshead, tabs) {
1556 		t->flags &= ~TAB_CURRENT;
1557 	}
1558 
1559 	tab->flags |= TAB_CURRENT;
1560 }
1561 
1562 static struct tab *
1563 new_tab(void)
1564 {
1565 	struct tab	*tab, *t;
1566 	const char	*url = "about:new";
1567 
1568 	if ((tab = calloc(1, sizeof(*tab))) == NULL)
1569 		goto err;
1570 
1571 	if ((tab->s = calloc(1, sizeof(*t->s))) == NULL)
1572 		goto err;
1573 
1574 	TAILQ_INIT(&tab->s->head);
1575 
1576 	tab->id = tab_counter++;
1577 	switch_to_tab(tab);
1578 
1579 	if (TAILQ_EMPTY(&tabshead))
1580 		TAILQ_INSERT_HEAD(&tabshead, tab, tabs);
1581 	else
1582 		TAILQ_INSERT_TAIL(&tabshead, tab, tabs);
1583 
1584 	load_url_in_tab(tab, url);
1585 	return tab;
1586 
1587 err:
1588 	event_loopbreak();
1589 	return NULL;
1590 }
1591 
1592 int
1593 ui_init(void)
1594 {
1595 	setlocale(LC_ALL, "");
1596 
1597 	TAILQ_INIT(&global_map.m);
1598 	global_map.unhandled_input = global_key_unbound;
1599 
1600 	TAILQ_INIT(&minibuffer_map.m);
1601 
1602 	TAILQ_INIT(&eecmd_history.head);
1603 	TAILQ_INIT(&ir_history.head);
1604 	TAILQ_INIT(&lu_history.head);
1605 
1606 	base_map = &global_map;
1607 	current_map = &global_map;
1608 	load_default_keys();
1609 
1610 	initscr();
1611 	raw();
1612 	noecho();
1613 
1614 	nonl();
1615 	intrflush(stdscr, FALSE);
1616 
1617 	if ((tabline = newwin(1, COLS, 0, 0)) == NULL)
1618 		return 0;
1619 	if ((body = newwin(LINES - 3, COLS, 1, 0)) == NULL)
1620 		return 0;
1621 	if ((modeline = newwin(1, COLS, LINES-2, 0)) == NULL)
1622 		return 0;
1623 	if ((minibuf = newwin(1, COLS, LINES-1, 0)) == NULL)
1624 		return 0;
1625 
1626 	body_lines = LINES-3;
1627 	body_cols = COLS;
1628 
1629 	keypad(body, TRUE);
1630 	scrollok(body, TRUE);
1631 
1632 	/* non-blocking input */
1633 	wtimeout(body, 0);
1634 
1635 	mvwprintw(body, 0, 0, "");
1636 
1637 	event_set(&stdioev, 0, EV_READ | EV_PERSIST, dispatch_stdio, NULL);
1638 	event_add(&stdioev, NULL);
1639 
1640 	signal_set(&winchev, SIGWINCH, handle_resize, NULL);
1641 	signal_add(&winchev, NULL);
1642 
1643 	new_tab();
1644 
1645 	return 1;
1646 }
1647 
1648 void
1649 ui_on_tab_loaded(struct tab *tab)
1650 {
1651 	stop_loading_anim(tab);
1652 	message("Loaded %s", tab->urlstr);
1653 }
1654 
1655 void
1656 ui_on_tab_refresh(struct tab *tab)
1657 {
1658 	if (!(tab->flags & TAB_CURRENT))
1659 		return;
1660 
1661 	wrap_page(tab);
1662 	redraw_tab(tab);
1663 }
1664 
1665 void
1666 ui_require_input(struct tab *tab, int hide)
1667 {
1668 	/* TODO: hard-switching to another tab is ugly */
1669 	switch_to_tab(tab);
1670 
1671 	enter_minibuffer(ir_self_insert, ir_select, exit_minibuffer,
1672 	    &ir_history);
1673 	strlcpy(ministate.prompt, "Input required: ",
1674 	    sizeof(ministate.prompt));
1675 	redraw_tab(tab);
1676 }
1677 
1678 void
1679 ui_end(void)
1680 {
1681 	endwin();
1682 }