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 <curses.h>
20 #include <limits.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 
25 #include "cmd.h"
26 #include "defaults.h"
27 #include "keymap.h"
28 #include "telescope.h"
29 #include "ui.h"
30 #include "utils.h"
31 #include "xwrapper.h"
32 
33 char	*default_protocol = NULL;
34 char	*download_path = NULL;
35 char	*new_tab_url = NULL;
36 char	*default_search_engine = NULL;
37 
38 int autosave = 20;
39 int dont_wrap_pre = 0;
40 int dont_apply_styling = 0;
41 int emojify_link = 1;
42 int enable_colors = 1;
43 int fill_column = 120;
44 int fringe_ignore_offset = 1;
45 int hide_pre_blocks = 0;
46 int hide_pre_closing_line = 0;
47 int hide_pre_context = 0;
48 int load_url_use_heuristic = 1;
49 int max_killed_tabs = 10;
50 int olivetti_mode = 1;
51 int set_title = 1;
52 int tab_bar_show = 1;
53 
54 static struct line fringe_line = {
55 	.type = LINE_FRINGE,
56 };
57 struct vline fringe = {
58 	.parent = &fringe_line,
59 };
60 
61 struct lineprefix line_prefixes[] = {
62 	[LINE_TEXT] =		{ "",		"" },
63 	[LINE_LINK] =		{ "→ ",		"  " },
64 	[LINE_TITLE_1] =	{ "# ",		"  " },
65 	[LINE_TITLE_2] =	{ "## ",	"   " },
66 	[LINE_TITLE_3] =	{ "### ",	"    " },
67 	[LINE_ITEM] =		{ " • ",	"   " },
68 	[LINE_QUOTE] =		{ " ┃ ",	" ┃ " },
69 	[LINE_PRE_START] =	{ "─── ",	"    " },
70 	[LINE_PRE_CONTENT] =	{ "",		"" },
71 	[LINE_PRE_END] =	{ "─── ",	"" },
72 
73 	[LINE_PATCH] =		{"", ""},
74 	[LINE_PATCH_HDR] =	{"", ""},
75 	[LINE_PATCH_HUNK_HDR] =	{"", ""},
76 	[LINE_PATCH_ADD] =	{"", ""},
77 	[LINE_PATCH_DEL] =	{"", ""},
78 
79 	[LINE_COMPL] =		{"", ""},
80 	[LINE_COMPL_CURRENT] =	{"", ""},
81 
82 	[LINE_HELP] =		{"", ""},
83 
84 	[LINE_DOWNLOAD] =	{" Fetching ", "          "},
85 	[LINE_DOWNLOAD_DONE] =	{" Done     ", "          "},
86 	[LINE_DOWNLOAD_INFO] =	{" ", " "},
87 
88 	[LINE_FRINGE] =		{"~", ""},
89 };
90 
91 struct lineprefix raw_prefixes[] = {
92 	[LINE_TEXT] =		{ "",		"" },
93 	[LINE_LINK] =		{ "=> ",	"" },
94 	[LINE_TITLE_1] =	{ "# ",		"" },
95 	[LINE_TITLE_2] =	{ "## ",	"" },
96 	[LINE_TITLE_3] =	{ "### ",	"" },
97 	[LINE_ITEM] =		{ "* ",		"" },
98 	[LINE_QUOTE] =		{ "> ",		"" },
99 	[LINE_PRE_START] =	{ "``` ",	"" },
100 	[LINE_PRE_CONTENT] =	{ "",		"" },
101 	[LINE_PRE_END] =	{ "``` ",	"" },
102 
103 	[LINE_PATCH] =		{"", ""},
104 	[LINE_PATCH_HDR] =	{"", ""},
105 	[LINE_PATCH_HUNK_HDR] =	{"", ""},
106 	[LINE_PATCH_ADD] =	{"", ""},
107 	[LINE_PATCH_DEL] =	{"", ""},
108 
109 	[LINE_COMPL] =		{"", ""},
110 	[LINE_COMPL_CURRENT] =	{"", ""},
111 
112 	[LINE_HELP] =		{"", ""},
113 
114 	[LINE_DOWNLOAD] =	{" Fetching ", "          "},
115 	[LINE_DOWNLOAD_DONE] =	{" Done     ", "          "},
116 	[LINE_DOWNLOAD_INFO] =	{" ", " "},
117 
118 	[LINE_FRINGE] =		{"~", ""},
119 };
120 
121 struct line_face line_faces[] = {
122 	[LINE_TEXT] =		{
123 		.prfx_pair = PT_PRFX,
124 		.pair = PT,
125 		.trail_pair = PT_TRAIL,
126 	},
127 	[LINE_LINK] =		{
128 		.prfx_pair = PL_PRFX,
129 		.pair = PL,
130 		.trail_pair = PL_TRAIL,
131 		.attr = A_UNDERLINE,
132 	},
133 	[LINE_TITLE_1] =	{
134 		.prfx_pair = PT1_PRFX,
135 		.pair = PT1,
136 		.trail_pair = PT1_TRAIL,
137 		.attr = A_BOLD,
138 	},
139 	[LINE_TITLE_2] =	{
140 		.prfx_pair = PT2_PRFX,
141 		.pair = PT2,
142 		.trail_pair = PT2_TRAIL,
143 		.attr = A_BOLD,
144 	},
145 	[LINE_TITLE_3] =	{
146 		.prfx_pair = PT3_PRFX,
147 		.pair = PT3,
148 		.trail_pair = PT3_TRAIL,
149 		.attr = A_BOLD,
150 	},
151 	[LINE_ITEM] =		{
152 		.prfx_pair = PI_PRFX,
153 		.pair = PI,
154 		.trail_pair = PI_TRAIL,
155 	},
156 	[LINE_QUOTE] =		{
157 		.prfx_pair = PQ_PRFX,
158 		.pair = PQ,
159 		.trail_pair = PQ_TRAIL,
160 		.attr = A_DIM,
161 	},
162 	[LINE_PRE_START] =	{
163 		.prfx_pair = PPSTART_PRFX,
164 		.pair = PPSTART,
165 		.trail_pair = PPSTART_TRAIL,
166 	},
167 	[LINE_PRE_CONTENT] =	{
168 		.prfx_pair = PP_PRFX,
169 		.pair = PP,
170 		.trail_pair = PP_TRAIL,
171 	},
172 	[LINE_PRE_END] =	{
173 		.prfx_pair = PPEND_PRFX,
174 		.pair = PPEND,
175 		.trail_pair = PPEND_TRAIL,
176 	},
177 
178 	/* text/x-patch */
179 	[LINE_PATCH] = {
180 		.prfx_pair = PPATCH_PRFX,
181 		.pair = PPATCH,
182 		.trail_pair = PPATCH_TRAIL,
183 	},
184 	[LINE_PATCH_HDR] = {
185 		.prfx_pair = PPATCH_HDR_PRFX,
186 		.pair = PPATCH_HDR,
187 		.trail_pair = PPATCH_HDR_TRAIL,
188 	},
189 	[LINE_PATCH_HUNK_HDR] = {
190 		.prfx_pair = PPATCH_HUNK_HDR_PRFX,
191 		.pair = PPATCH_HUNK_HDR,
192 		.trail_pair = PPATCH_HUNK_HDR_TRAIL,
193 	},
194 	[LINE_PATCH_ADD] = {
195 		.prfx_pair = PPATCH_ADD_PRFX,
196 		.pair = PPATCH_ADD,
197 		.trail_pair = PPATCH_ADD_TRAIL,
198 	},
199 	[LINE_PATCH_DEL] = {
200 		.prfx_pair = PPATCH_DEL_PRFX,
201 		.pair = PPATCH_DEL,
202 		.trail_pair = PPATCH_DEL_TRAIL,
203 	},
204 
205 	/* minibuffer */
206 	[LINE_COMPL] = {
207 		.prfx_pair = PCOMPL_PRFX,
208 		.pair = PCOMPL,
209 		.trail_pair = PCOMPL_TRAIL,
210 	},
211 	[LINE_COMPL_CURRENT] = {
212 		.prfx_pair = PCOMPL_CURR_PRFX,
213 		.pair = PCOMPL_CURR,
214 		.trail_pair = PCOMPL_CURR_TRAIL,
215 		.attr = A_REVERSE,
216 		.trail_attr = A_REVERSE,
217 	},
218 
219 	/* help */
220 	[LINE_HELP] = {
221 		.prfx_pair = PHELP_PRFX,
222 		.pair = PHELP,
223 		.trail_pair = PHELP_TRAIL,
224 	},
225 
226 	/* download */
227 	[LINE_DOWNLOAD] = {
228 		.prfx_pair = PDOWNLOAD_PRFX,
229 		.pair = PDOWNLOAD,
230 		.trail_pair = PDOWNLOAD_TRAIL
231 	},
232 	[LINE_DOWNLOAD_DONE] = {
233 		.prfx_pair = PDOWNLOAD_DONE_PRFX,
234 		.pair = PDOWNLOAD_DONE,
235 		.trail_pair = PDOWNLOAD_DONE_TRAIL
236 	},
237 	[LINE_DOWNLOAD_INFO] = {
238 		.prfx_pair = PDOWNLOAD_INFO_PRFX,
239 		.pair = PDOWNLOAD_INFO,
240 		.trail_pair = PDOWNLOAD_INFO_TRAIL
241 	},
242 
243 	/* misc ui */
244 	[LINE_FRINGE] = {
245 		.prfx_pair = PFRINGE_PRFX,
246 		.pair = PFRINGE,
247 		.trail_pair = PFRINGE_TRAIL,
248 	}
249 };
250 
251 struct tab_face tab_face = {
252 	.bg_attr = A_REVERSE, .bg_bg = -1, .bg_fg = -1,
253 	.t_attr  = A_REVERSE, .t_bg  = -1, .t_fg  = -1,
254 	.c_attr  = A_NORMAL,  .c_bg  = -1, .c_fg  = -1,
255 
256 	/*
257 	 * set these so that even when enable-color=0 the bar has some
258 	 * sane defaults.
259 	 */
260 	.background =	A_REVERSE,
261 	.tab =		A_REVERSE,
262 	.current =	A_NORMAL,
263 };
264 
265 struct body_face body_face = {
266 	.lbg = -1, .lfg = -1,
267 	.bg  = -1, .fg  = -1,
268 	.rbg = -1, .rfg = -1,
269 };
270 
271 struct download_face download_face = {
272 	.bg = -1,
273 	.fg = -1,
274 	.attr = A_NORMAL,
275 };
276 
277 struct modeline_face modeline_face = {
278 	.bg  = -1,
279 	.fg  = -1,
280 	.attr = A_REVERSE,
281 };
282 
283 struct minibuffer_face minibuffer_face = {
284 	.bg = -1,
285 	.fg = -1,
286 	.attr = A_NORMAL,
287 };
288 
289 struct mapping {
290 	const char	*label;
291 	int		 linetype;
292 } mappings[] = {
293 	{"text",	LINE_TEXT},
294 	{"link",	LINE_LINK},
295 	{"title1",	LINE_TITLE_1},
296 	{"title2",	LINE_TITLE_2},
297 	{"title3",	LINE_TITLE_3},
298 	{"item",	LINE_ITEM},
299 	{"quote",	LINE_QUOTE},
300 	{"pre.start",	LINE_PRE_START},
301 	{"pre",		LINE_PRE_CONTENT},
302 	{"pre.end",	LINE_PRE_END},
303 
304 	/* text/x-patch */
305 	{"patch",	LINE_PATCH},
306 	{"patch.hdr",	LINE_PATCH_HDR},
307 	{"patch.hunk",	LINE_PATCH_HUNK_HDR},
308 	{"patch.add",	LINE_PATCH_ADD},
309 	{"patch.del",	LINE_PATCH_DEL},
310 
311 	/* minibuffer */
312 	{"compl",	LINE_COMPL},
313 	{"compl.current", LINE_COMPL_CURRENT},
314 
315 	/* help */
316 	{"help",	LINE_HELP},
317 
318 	/* download */
319 	{"download.ongoing",	LINE_DOWNLOAD},
320 	{"download.done",	LINE_DOWNLOAD_DONE},
321 	{"download.info",	LINE_DOWNLOAD_INFO},
322 
323 	/* misc ui */
324 	{"fringe",		LINE_FRINGE},
325 };
326 
327 static struct mapping *
328 mapping_by_name(const char *name)
329 {
330 	size_t i;
331 
332 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
333 		if (!strcmp(name, mappings[i].label))
334 			return &mappings[i];
335 	}
336 
337 	return NULL;
338 }
339 
340 static inline void
341 global_set_key(const char *key, void (*fn)(struct buffer*))
342 {
343 	if (!kmap_define_key(&global_map, key, fn))
344 		_exit(1);
345 }
346 
347 static inline void
348 minibuffer_set_key(const char *key, void (*fn)(struct buffer*))
349 {
350 	if (!kmap_define_key(&minibuffer_map, key, fn))
351 		_exit(1);
352 }
353 
354 static void
355 load_default_keys(void)
356 {
357 	/* === global map === */
358 
359 	/* emacs */
360 	global_set_key("C-p",		cmd_previous_line);
361 	global_set_key("C-n",		cmd_next_line);
362 	global_set_key("C-f",		cmd_forward_char);
363 	global_set_key("C-b",		cmd_backward_char);
364 	global_set_key("M-{",		cmd_backward_paragraph);
365 	global_set_key("M-}",		cmd_forward_paragraph);
366 	global_set_key("C-a",		cmd_move_beginning_of_line);
367 	global_set_key("C-e",		cmd_move_end_of_line);
368 
369 	global_set_key("M-v",		cmd_scroll_up);
370 	global_set_key("C-v",		cmd_scroll_down);
371 	global_set_key("M-space",	cmd_scroll_up);
372 	global_set_key("space",		cmd_scroll_down);
373 
374 	global_set_key("M-<",		cmd_beginning_of_buffer);
375 	global_set_key("M->",		cmd_end_of_buffer);
376 
377 	global_set_key("C-x C-c",	cmd_kill_telescope);
378 	global_set_key("C-x C-w",	cmd_write_buffer);
379 
380 	global_set_key("C-g",		cmd_clear_minibuf);
381 
382 	global_set_key("M-x",		cmd_execute_extended_command);
383 
384 	global_set_key("C-c {",		cmd_dec_fill_column);
385 	global_set_key("C-c }",		cmd_inc_fill_column);
386 
387 	global_set_key("C-c p",		cmd_previous_heading);
388 	global_set_key("C-c n",		cmd_next_heading);
389 
390 	global_set_key(">",		cmd_load_url);
391 	global_set_key("<",		cmd_load_current_url);
392 	global_set_key("C-x C-f",	cmd_load_url);
393 	global_set_key("C-x M-f",	cmd_load_current_url);
394 
395 	global_set_key("C-x o",		cmd_other_window);
396 
397 	global_set_key("C-x t 0",	cmd_tab_close);
398 	global_set_key("C-x t 1",	cmd_tab_close_other);
399 	global_set_key("C-x t 2",	cmd_tab_new);
400 	global_set_key("C-x t o",	cmd_tab_next);
401 	global_set_key("C-x t O",	cmd_tab_previous);
402 	global_set_key("C-x t m",	cmd_tab_move);
403 	global_set_key("C-x t M",	cmd_tab_move_to);
404 
405 	global_set_key("B",		cmd_previous_page);
406 	global_set_key("C-M-b",		cmd_previous_page);
407 	global_set_key("F",		cmd_next_page);
408 	global_set_key("C-M-f",		cmd_next_page);
409 
410 	global_set_key("<f7> a",	cmd_bookmark_page);
411 	global_set_key("<f7> <f7>",	cmd_list_bookmarks);
412 
413 	global_set_key("C-z",		cmd_suspend_telescope);
414 
415 	/* vi/vi-like */
416 	global_set_key("k",		cmd_previous_line);
417 	global_set_key("j",		cmd_next_line);
418 	global_set_key("l",		cmd_forward_char);
419 	global_set_key("h",		cmd_backward_char);
420 	global_set_key("{",		cmd_backward_paragraph);
421 	global_set_key("}",		cmd_forward_paragraph);
422 	global_set_key("^",		cmd_move_beginning_of_line);
423 	global_set_key("$",		cmd_move_end_of_line);
424 
425 	global_set_key("K",		cmd_scroll_line_up);
426 	global_set_key("J",		cmd_scroll_line_down);
427 
428 	global_set_key("g g",		cmd_beginning_of_buffer);
429 	global_set_key("G",		cmd_end_of_buffer);
430 
431 	global_set_key("g u",		cmd_up);
432 	global_set_key("g r",		cmd_root);
433 	global_set_key("g h",		cmd_home);
434 	global_set_key("g D",		cmd_tab_close);
435 	global_set_key("g N",		cmd_tab_new);
436 	global_set_key("g t",		cmd_tab_next);
437 	global_set_key("g T",		cmd_tab_previous);
438 	global_set_key("g M-t",		cmd_tab_move);
439 	global_set_key("g M-T",		cmd_tab_move_to);
440 
441 	global_set_key("H",		cmd_previous_page);
442 	global_set_key("L",		cmd_next_page);
443 
444 	global_set_key("u",		cmd_tab_undo_close);
445 
446 	/* tmp */
447 	global_set_key("q",		cmd_kill_telescope);
448 
449 	global_set_key("esc",		cmd_clear_minibuf);
450 
451 	global_set_key(":",		cmd_execute_extended_command);
452 
453 	/* cua */
454 	global_set_key("<up>",		cmd_previous_line);
455 	global_set_key("<down>",	cmd_next_line);
456 	global_set_key("<right>",	cmd_forward_char);
457 	global_set_key("<left>",	cmd_backward_char);
458 	global_set_key("<home>",	cmd_move_beginning_of_line);
459 	global_set_key("<end>",		cmd_move_end_of_line);
460 	global_set_key("<prior>",	cmd_scroll_up);
461 	global_set_key("<next>",	cmd_scroll_down);
462 
463 	global_set_key("C-w",		cmd_tab_close);
464 	global_set_key("C-t",		cmd_tab_new);
465 	global_set_key("M-<prior>",	cmd_tab_previous);
466 	global_set_key("M-<next>",	cmd_tab_next);
467 
468 	global_set_key("del",		cmd_previous_page);
469 	global_set_key("M-<left>",	cmd_previous_page);
470 	global_set_key("M-<right>",	cmd_next_page);
471 
472 	global_set_key("<f5>",		cmd_reload_page);
473 	global_set_key("r",		cmd_reload_page);
474 
475 	/* "ncurses standard" */
476 	global_set_key("C-l",		cmd_redraw);
477 
478 	/* global */
479 	global_set_key("<f1>",		cmd_toggle_help);
480 	global_set_key("<f2>",		cmd_toggle_downloads);
481 	global_set_key("C-m",		cmd_push_button);
482 	global_set_key("M-enter",	cmd_push_button_new_tab);
483 	global_set_key("M-tab",		cmd_previous_button);
484 	global_set_key("backtab",	cmd_previous_button);
485 	global_set_key("tab",		cmd_next_button);
486 	global_set_key("M-t",		cmd_tab_select);
487 	global_set_key("[",		cmd_tab_previous);
488 	global_set_key("]",		cmd_tab_next);
489 	global_set_key("M-[",		cmd_tab_move_to);
490 	global_set_key("M-]",		cmd_tab_move);
491 	global_set_key("M-l",		cmd_link_select);
492 	global_set_key("M-/",		cmd_swiper);
493 	global_set_key("t",		cmd_toc);
494 	global_set_key("M-r",		cmd_reply_last_input);
495 	global_set_key("s",		cmd_search);
496 
497 	/* === minibuffer map === */
498 	minibuffer_set_key("ret",	cmd_mini_complete_and_exit);
499 	minibuffer_set_key("C-g",	cmd_mini_abort);
500 	minibuffer_set_key("esc",	cmd_mini_abort);
501 	minibuffer_set_key("C-d",	cmd_mini_delete_char);
502 	minibuffer_set_key("del",	cmd_mini_delete_backward_char);
503 	minibuffer_set_key("backspace",	cmd_mini_delete_backward_char);
504 	minibuffer_set_key("C-h",	cmd_mini_delete_backward_char);
505 	minibuffer_set_key("C-x",	cmd_mini_edit_external);
506 
507 	minibuffer_set_key("C-b",	cmd_backward_char);
508 	minibuffer_set_key("C-f",	cmd_forward_char);
509 	minibuffer_set_key("<left>",	cmd_backward_char);
510 	minibuffer_set_key("<right>",	cmd_forward_char);
511 	minibuffer_set_key("C-e",	cmd_move_end_of_line);
512 	minibuffer_set_key("C-a",	cmd_move_beginning_of_line);
513 	minibuffer_set_key("<end>",	cmd_move_end_of_line);
514 	minibuffer_set_key("<home>",	cmd_move_beginning_of_line);
515 	minibuffer_set_key("C-k",	cmd_mini_kill_line);
516 	minibuffer_set_key("C-u",	cmd_mini_kill_whole_line);
517 
518 	minibuffer_set_key("M-p",	cmd_mini_previous_history_element);
519 	minibuffer_set_key("M-n",	cmd_mini_next_history_element);
520 
521 	minibuffer_set_key("C-p",	cmd_previous_completion);
522 	minibuffer_set_key("C-n",	cmd_next_completion);
523 	minibuffer_set_key("<up>",	cmd_previous_completion);
524 	minibuffer_set_key("<down>",	cmd_next_completion);
525 
526 	minibuffer_set_key("C-v",	cmd_mini_scroll_down);
527 	minibuffer_set_key("M-v",	cmd_mini_scroll_up);
528 	minibuffer_set_key("<next>",	cmd_mini_scroll_down);
529 	minibuffer_set_key("<prior>",	cmd_mini_scroll_up);
530 
531 	minibuffer_set_key("M-<",	cmd_mini_goto_beginning);
532 	minibuffer_set_key("M->",	cmd_mini_goto_end);
533 
534 	minibuffer_set_key("tab",	cmd_insert_current_candidate);
535 }
536 
537 void
538 config_init(void)
539 {
540 	struct line_face *f;
541 	size_t i, len;
542 
543 	default_search_engine = xstrdup("gemini://kennedy.gemi.dev/search");
544 
545 	len = sizeof(line_faces)/sizeof(line_faces[0]);
546 	for (i = 0; i < len; ++i) {
547 		f = &line_faces[i];
548 
549 		f->prfx_bg = f->bg = f->trail_bg = -1;
550 		f->prfx_fg = f->fg = f->trail_fg = -1;
551 	}
552 
553 	line_faces[LINE_LINK].fg = COLOR_BLUE;
554 	line_faces[LINE_PATCH_ADD].fg = COLOR_CYAN;
555 	line_faces[LINE_PATCH_DEL].fg = COLOR_MAGENTA;
556 
557 	load_default_keys();
558 }
559 
560 int
561 config_setprfx(const char *name, const char *prfx, const char *cont)
562 {
563 	struct lineprefix *p;
564 	struct mapping *m;
565 
566 	if (strncmp(name, "line.", 5) != 0)
567 		return 0;
568 	name += 5;
569 
570 	if ((m = mapping_by_name(name)) == NULL)
571 		return 0;
572 
573 	p = &line_prefixes[m->linetype];
574 	p->prfx1 = prfx;
575 	p->prfx2 = cont;
576 
577 	return 1;
578 }
579 
580 int
581 config_setvari(const char *var, int val)
582 {
583 	if (!strcmp(var, "autosave")) {
584 		autosave = val;
585 	} else if (!strcmp(var, "fill-column")) {
586 		if ((fill_column = val) <= 0)
587 			fill_column = INT_MAX;
588 	} else if (!strcmp(var, "max-killed-tabs")) {
589 		if (val >= 0)
590 			max_killed_tabs = MIN(val, 128);
591 	} else if (!strcmp(var, "tab-bar-show")) {
592 		if (val < 0)
593 			tab_bar_show = -1;
594 		else if (val == 0)
595 			tab_bar_show = 0;
596 		else
597 			tab_bar_show = 1;
598 	} else {
599 		return 0;
600 	}
601 
602 	return 1;
603 }
604 
605 int
606 config_setvars(const char *var, char *val)
607 {
608 	if (!strcmp(var, "default-protocol")) {
609 		if (strcmp(val, "finger") &&
610 		    strcmp(val, "gopher") &&
611 		    strcmp(val, "gemini"))
612 			return 0;
613 
614 		free(default_protocol);
615 		default_protocol = val;
616 		return 1;
617 	}
618 
619 	if (!strcmp(var, "default-search-engine")) {
620 		if (strncmp(val, "gemini://", 9) != 0 &&
621 		    strncmp(val, "gopher://", 9) != 0)
622 			return 0;
623 
624 		free(default_search_engine);
625 		default_search_engine = val;
626 		return 1;
627 	}
628 
629 	if (!strcmp(var, "download-path")) {
630 		const char *prfx = "", *v = val, *sufx = "";
631 
632 		if (!strncmp(val, "~/", 2) &&
633 		    v++ &&
634 		    (prfx = getenv("HOME")) == NULL)
635 			return 0;
636 
637 		if (!has_suffix(val, "/"))
638 			sufx = "/";
639 
640 		free(download_path);
641 		xasprintf(&download_path, "%s%s%s", prfx, v, sufx);
642 
643 		free(val);
644 		return 1;
645 	}
646 
647 	if (!strcmp(var, "new-tab-url")) {
648 		free(new_tab_url);
649 		new_tab_url = val;
650 		return 1;
651 	}
652 
653 	return 0;
654 }
655 
656 int
657 config_setvarb(const char *var, int val) {
658 	val = !!val;
659 
660 	if (!strcmp(var, "dont-wrap-pre")) {
661 		dont_wrap_pre = val;
662 		return 1;
663 	}
664 
665 	if (!strcmp(var, "emojify-link")) {
666 		emojify_link = val;
667 		return 1;
668 	}
669 
670 	if (!strcmp(var, "enable-colors")) {
671 		enable_colors = val;
672 		return 1;
673 	}
674 
675 	if (!strcmp(var, "fringe-ignore-offset")) {
676 		fringe_ignore_offset = val;
677 		return 1;
678 	}
679 
680 	if (!strcmp(var, "hide-pre-blocks")) {
681 		hide_pre_blocks = val;
682 		return 1;
683 	}
684 
685 	if (!strcmp(var, "hide-pre-closing-line")) {
686 		hide_pre_closing_line = val;
687 		return 1;
688 	}
689 
690 	if (!strcmp(var, "hide-pre-context")) {
691 		hide_pre_context = val;
692 		return 1;
693 	}
694 
695 	if (!strcmp(var, "load-url-use-heuristic")) {
696 		load_url_use_heuristic = val;
697 		return 1;
698 	}
699 
700 	if (!strcmp(var, "olivetti-mode")) {
701 		olivetti_mode = val;
702 		return 1;
703 	}
704 
705 	if (!strcmp(var, "update-title") ||
706 	    !strcmp(var, "set-title")) {
707 		set_title = val;
708 		return 1;
709 	}
710 
711 	return 0;
712 }
713 
714 int
715 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
716 {
717 	struct mapping *m;
718 	struct line_face *f;
719 
720 	if (!strcmp(name, "tabline")) {
721 		if (bg)
722 			tab_face.bg_bg = prfx;
723 		else
724 			tab_face.bg_fg = prfx;
725 	} else if (!strncmp(name, "tabline.", 8)) {
726 		name += 8;
727 
728 		if (!strcmp(name, "tab")) {
729 			if (bg)
730 				tab_face.t_bg = prfx;
731 			else
732 				tab_face.t_fg = prfx;
733 		} else if (!strcmp(name, "current")) {
734 			if (bg)
735 				tab_face.c_bg = prfx;
736 			else
737 				tab_face.c_fg = prfx;
738 		} else
739 			return 0;
740 	} else if (!strncmp(name, "line.", 5)) {
741 		name += 5;
742 
743 		if ((m = mapping_by_name(name)) == NULL)
744 			return 0;
745 
746 		f = &line_faces[m->linetype];
747 
748 		if (bg) {
749 			f->prfx_bg = prfx;
750 			f->bg = line;
751 			f->trail_bg = trail;
752 		} else {
753 			f->prfx_fg = prfx;
754 			f->fg = line;
755 			f->trail_fg = trail;
756 		}
757 	} else if (!strcmp(name, "line")) {
758 		if (bg) {
759 			body_face.lbg = prfx;
760 			body_face.bg  = line;
761 			body_face.rbg = trail;
762 		} else {
763 			body_face.lfg = prfx;
764 			body_face.fg = line;
765 			body_face.rfg = trail;
766 		}
767 	} else if (!strcmp(name, "download")) {
768 		if (bg)
769 			download_face.bg = prfx;
770 		else
771 			download_face.fg = prfx;
772 	} else if (!strcmp(name, "minibuffer")) {
773 		if (bg)
774 			minibuffer_face.bg = prfx;
775 		else
776 			minibuffer_face.fg = prfx;
777 	} else if (!strcmp(name, "modeline")) {
778 		if (bg)
779 			modeline_face.bg = prfx;
780 		else
781 			modeline_face.fg = prfx;
782 	} else {
783 		return 0;
784 	}
785 
786 	return 1;
787 }
788 
789 int
790 config_setattr(const char *name, int prfx, int line, int trail)
791 {
792 	struct mapping *m;
793 	struct line_face *f;
794 
795 	if (!strcmp(name, "tabline")) {
796 		tab_face.bg_attr = prfx;
797 	} else if (!strncmp(name, "tabline.", 8)) {
798 		name += 8;
799 
800 		if (!strcmp(name, "tab"))
801 			tab_face.t_attr = prfx;
802 		else if (!strcmp(name, "current"))
803 			tab_face.c_attr = prfx;
804 		else
805 			return 0;
806 	} else if (!strncmp(name, "line.", 5)) {
807 		name += 5;
808 
809 		if ((m = mapping_by_name(name)) == NULL)
810 			return 0;
811 
812 		f = &line_faces[m->linetype];
813 
814 		f->prfx_attr = prfx;
815 		f->attr = line;
816 		f->trail_attr = trail;
817 	} else if (!strcmp(name, "download")) {
818 		download_face.attr = prfx;
819 	} else if (!strcmp(name, "minibuffer")) {
820 		minibuffer_face.attr = prfx;
821 	} else if (!strcmp(name, "modeline")) {
822 		modeline_face.attr = prfx;
823 	} else {
824 		return 0;
825 	}
826 
827 	return 1;
828 }
829 
830 static inline void
831 tl_init_pair(int colors, int pair, int f, int b)
832 {
833 	if (f >= colors || !enable_colors)
834 		f = -1;
835 	if (b >= colors || !enable_colors)
836 		b = -1;
837 	init_pair(pair, f, b);
838 }
839 
840 void
841 config_apply_style(void)
842 {
843 	size_t i, colors, len;
844 	struct line_face *f;
845 	int old_ec = enable_colors;
846 
847 	colors = COLORS;
848 
849 	if (dont_apply_styling)
850 		enable_colors = 0;
851 
852 	len = sizeof(line_faces)/sizeof(line_faces[0]);
853 	for (i = 0; i < len; ++i) {
854 		f = &line_faces[i];
855 
856 		tl_init_pair(colors, f->prfx_pair, f->prfx_fg, f->prfx_bg);
857 		f->prefix = COLOR_PAIR(f->prfx_pair) | f->prfx_attr;
858 
859 		tl_init_pair(colors, f->pair, f->fg, f->bg);
860 		f->text = COLOR_PAIR(f->pair) | f->attr;
861 
862 		tl_init_pair(colors, f->trail_pair, f->trail_fg, f->trail_bg);
863 		f->trail = COLOR_PAIR(f->trail_pair) | f->trail_attr;
864 	}
865 
866 	/* body */
867 	tl_init_pair(colors, PBODY, body_face.fg, body_face.bg);
868 	body_face.body = COLOR_PAIR(PBODY);
869 
870 	/* Restore color setting here -- it's only potentially disabled for
871 	 * the body.
872 	 */
873 	enable_colors = old_ec;
874 
875 	/* tab line */
876 	tl_init_pair(colors, PTL_BG, tab_face.bg_fg, tab_face.bg_bg);
877 	tab_face.background = COLOR_PAIR(PTL_BG) | tab_face.bg_attr;
878 
879 	tl_init_pair(colors, PTL_TAB, tab_face.t_fg, tab_face.t_bg);
880 	tab_face.tab = COLOR_PAIR(PTL_TAB) | tab_face.t_attr;
881 
882 	tl_init_pair(colors, PTL_CURR, tab_face.c_fg, tab_face.c_bg);
883 	tab_face.current = COLOR_PAIR(PTL_CURR) | tab_face.c_attr;
884 
885 	tl_init_pair(colors, PBLEFT, body_face.lfg, body_face.lbg);
886 	body_face.left = COLOR_PAIR(PBLEFT);
887 
888 	tl_init_pair(colors, PBRIGHT, body_face.rfg, body_face.rbg);
889 	body_face.right = COLOR_PAIR(PBRIGHT);
890 
891 	/* download */
892 	tl_init_pair(colors, PDOWNLOAD_WIN, download_face.fg, download_face.bg);
893 	download_face.background = COLOR_PAIR(PDOWNLOAD_WIN) | download_face.attr;
894 
895 	/* modeline */
896 	tl_init_pair(colors, PMODELINE, modeline_face.fg, modeline_face.bg);
897 	modeline_face.background = COLOR_PAIR(PMODELINE) | modeline_face.attr;
898 
899 	/* minibuffer */
900 	tl_init_pair(colors, PMINIBUF, minibuffer_face.fg, minibuffer_face.bg);
901 	minibuffer_face.background = COLOR_PAIR(PMINIBUF) | minibuffer_face.attr;
902 
903 }