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Date:: Sun Jun 27 14:00:00 2021 UTC
Message:: move load_default_keys to defaults.c free ui.c from (strictly) non-ui code
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1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "telescope.h"
18 
19 #include <curses.h>
20 #include <limits.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 
25 char *new_tab_url = NULL;
26 int fill_column = 80;
27 int olivetti_mode = 1;
28 int enable_colors = 1;
29 
30 struct lineprefix line_prefixes[] = {
31 	[LINE_TEXT] =		{ "",		"" },
32 	[LINE_LINK] =		{ "=> ",	"   " },
33 	[LINE_TITLE_1] =	{ "# ",		"  " },
34 	[LINE_TITLE_2] =	{ "## ",	"   " },
35 	[LINE_TITLE_3] =	{ "### ",	"    " },
36 	[LINE_ITEM] =		{ "* ",		"  " },
37 	[LINE_QUOTE] =		{ "> ",		"  " },
38 	[LINE_PRE_START] =	{ "```",	"   " },
39 	[LINE_PRE_CONTENT] =	{ "",		"" },
40 	[LINE_PRE_END] =	{ "```",	"```" },
41 };
42 
43 struct line_face line_faces[] = {
44 	[LINE_TEXT] =		{
45 		.prfx_pair = PT_PRFX,
46 		.pair = PT,
47 		.trail_pair = PT_TRAIL,
48 	},
49 	[LINE_LINK] =		{
50 		.prfx_pair = PL_PRFX,
51 		.pair = PL,
52 		.trail_pair = PL_TRAIL,
53 		.attr = A_UNDERLINE,
54 	},
55 	[LINE_TITLE_1] =	{
56 		.prfx_pair = PT1_PRFX,
57 		.pair = PT1,
58 		.trail_pair = PT1_TRAIL,
59 		.attr = A_BOLD,
60 	},
61 	[LINE_TITLE_2] =	{
62 		.prfx_pair = PT2_PRFX,
63 		.pair = PT2,
64 		.trail_pair = PT2_TRAIL,
65 		.attr = A_BOLD,
66 	},
67 	[LINE_TITLE_3] =	{
68 		.prfx_pair = PT3_PRFX,
69 		.pair = PT3,
70 		.trail_pair = PT3_TRAIL,
71 		.attr = A_BOLD,
72 	},
73 	[LINE_ITEM] =		{
74 		.prfx_pair = PI_PRFX,
75 		.pair = PI,
76 		.trail_pair = PI_TRAIL,
77 	},
78 	[LINE_QUOTE] =		{
79 		.prfx_pair = PQ_PRFX,
80 		.pair = PQ,
81 		.trail_pair = PQ_TRAIL,
82 		.attr = A_DIM,
83 	},
84 	[LINE_PRE_START] =	{
85 		.prfx_pair = PPSTART_PRFX,
86 		.pair = PPSTART,
87 		.trail_pair = PPSTART_TRAIL,
88 	},
89 	[LINE_PRE_CONTENT] =	{
90 		.prfx_pair = PP_PRFX,
91 		.pair = PP,
92 		.trail_pair = PP_TRAIL,
93 	},
94 	[LINE_PRE_END] =	{
95 		.prfx_pair = PPEND_PRFX,
96 		.pair = PPEND,
97 		.trail_pair = PPEND_TRAIL,
98 	},
99 };
100 
101 struct tab_face tab_face = {
102 	.bg_attr = A_REVERSE, .bg_bg = -1, .bg_fg = -1,
103 	.t_attr  = A_REVERSE, .t_bg  = -1, .t_fg  = -1,
104 	.c_attr  = A_NORMAL,  .c_bg  = -1, .c_fg  = -1,
105 
106 	/*
107 	 * set these so that even when enable-color=0 the bar has some
108 	 * sane defaults.
109 	 */
110 	.background =	A_REVERSE,
111 	.tab =		A_REVERSE,
112 	.current =	A_NORMAL,
113 };
114 
115 struct body_face body_face = {
116 	.lbg = -1, .lfg = -1,
117 	.bg  = -1, .fg  = -1,
118 	.rbg = -1, .rfg = -1,
119 };
120 
121 struct modeline_face modeline_face = {
122 	.bg  = -1,
123 	.fg  = -1,
124 	.attr = A_REVERSE,
125 };
126 
127 struct minibuffer_face minibuffer_face = {
128 	.bg = -1,
129 	.fg = -1,
130 	.attr = A_NORMAL,
131 };
132 
133 struct mapping {
134 	const char	*label;
135 	int		 linetype;
136 } mappings[] = {
137 	{"text",	LINE_TEXT},
138 	{"link",	LINE_LINK},
139 	{"title1",	LINE_TITLE_1},
140 	{"title2",	LINE_TITLE_2},
141 	{"title3",	LINE_TITLE_3},
142 	{"item",	LINE_ITEM},
143 	{"quote",	LINE_QUOTE},
144 	{"pre.start",	LINE_PRE_START},
145 	{"pre",		LINE_PRE_CONTENT},
146 	{"pre.end",	LINE_PRE_END},
147 };
148 
149 static struct mapping *
150 mapping_by_name(const char *name)
151 {
152 	size_t i;
153 
154 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
155 		if (!strcmp(name, mappings[i].label))
156 			return &mappings[i];
157 	}
158 
159 	return NULL;
160 }
161 
162 
163 static inline void
164 global_set_key(const char *key, void (*fn)(struct buffer*))
165 {
166 	if (!kmap_define_key(&global_map, key, fn))
167 		_exit(1);
168 }
169 
170 static inline void
171 minibuffer_set_key(const char *key, void (*fn)(struct buffer*))
172 {
173 	if (!kmap_define_key(&minibuffer_map, key, fn))
174 		_exit(1);
175 }
176 
177 static void
178 load_default_keys(void)
179 {
180 	/* === global map === */
181 
182 	/* emacs */
183 	global_set_key("C-p",		cmd_previous_line);
184 	global_set_key("C-n",		cmd_next_line);
185 	global_set_key("C-f",		cmd_forward_char);
186 	global_set_key("C-b",		cmd_backward_char);
187 	global_set_key("M-{",		cmd_backward_paragraph);
188 	global_set_key("M-}",		cmd_forward_paragraph);
189 	global_set_key("C-a",		cmd_move_beginning_of_line);
190 	global_set_key("C-e",		cmd_move_end_of_line);
191 
192 	global_set_key("M-v",		cmd_scroll_up);
193 	global_set_key("C-v",		cmd_scroll_down);
194 	global_set_key("M-space",	cmd_scroll_up);
195 	global_set_key("space",		cmd_scroll_down);
196 
197 	global_set_key("M-<",		cmd_beginning_of_buffer);
198 	global_set_key("M->",		cmd_end_of_buffer);
199 
200 	global_set_key("C-x C-c",	cmd_kill_telescope);
201 
202 	global_set_key("C-g",		cmd_clear_minibuf);
203 
204 	global_set_key("M-x",		cmd_execute_extended_command);
205 
206 	global_set_key("C-c {",		cmd_dec_fill_column);
207 	global_set_key("C-c }",		cmd_inc_fill_column);
208 
209 	global_set_key("C-c p",		cmd_previous_heading);
210 	global_set_key("C-c n",		cmd_next_heading);
211 
212 	global_set_key(">",		cmd_load_url);
213 	global_set_key("C-x C-f",	cmd_load_url);
214 	global_set_key("C-x M-f",	cmd_load_current_url);
215 
216 	global_set_key("C-x t 0",	cmd_tab_close);
217 	global_set_key("C-x t 1",	cmd_tab_close_other);
218 	global_set_key("C-x t 2",	cmd_tab_new);
219 	global_set_key("C-x t o",	cmd_tab_next);
220 	global_set_key("C-x t O",	cmd_tab_previous);
221 	global_set_key("C-x t m",	cmd_tab_move);
222 	global_set_key("C-x t M",	cmd_tab_move_to);
223 
224 	global_set_key("C-M-b",		cmd_previous_page);
225 	global_set_key("C-M-f",		cmd_next_page);
226 
227 	global_set_key("<f7> a",	cmd_bookmark_page);
228 	global_set_key("<f7> <f7>",	cmd_list_bookmarks);
229 
230 	/* vi/vi-like */
231 	global_set_key("k",		cmd_previous_line);
232 	global_set_key("j",		cmd_next_line);
233 	global_set_key("l",		cmd_forward_char);
234 	global_set_key("h",		cmd_backward_char);
235 	global_set_key("{",		cmd_backward_paragraph);
236 	global_set_key("}",		cmd_forward_paragraph);
237 	global_set_key("^",		cmd_move_beginning_of_line);
238 	global_set_key("$",		cmd_move_end_of_line);
239 
240 	global_set_key("K",		cmd_scroll_line_up);
241 	global_set_key("J",		cmd_scroll_line_down);
242 
243 	global_set_key("g g",		cmd_beginning_of_buffer);
244 	global_set_key("G",		cmd_end_of_buffer);
245 
246 	global_set_key("g D",		cmd_tab_close);
247 	global_set_key("g N",		cmd_tab_new);
248 	global_set_key("g t",		cmd_tab_next);
249 	global_set_key("g T",		cmd_tab_previous);
250 	global_set_key("g M-t",		cmd_tab_move);
251 	global_set_key("g M-T",		cmd_tab_move_to);
252 
253 	global_set_key("H",		cmd_previous_page);
254 	global_set_key("L",		cmd_next_page);
255 
256 	/* tmp */
257 	global_set_key("q",		cmd_kill_telescope);
258 
259 	global_set_key("esc",		cmd_clear_minibuf);
260 
261 	global_set_key(":",		cmd_execute_extended_command);
262 
263 	/* cua */
264 	global_set_key("<up>",		cmd_previous_line);
265 	global_set_key("<down>",	cmd_next_line);
266 	global_set_key("<right>",	cmd_forward_char);
267 	global_set_key("<left>",	cmd_backward_char);
268 	global_set_key("<prior>",	cmd_scroll_up);
269 	global_set_key("<next>",	cmd_scroll_down);
270 
271 	global_set_key("M-<left>",	cmd_previous_page);
272 	global_set_key("M-<right>",	cmd_next_page);
273 
274 	/* "ncurses standard" */
275 	global_set_key("C-l",		cmd_redraw);
276 
277 	/* global */
278 	global_set_key("<f1>",		cmd_toggle_help);
279 	global_set_key("C-m",		cmd_push_button);
280 	global_set_key("M-enter",	cmd_push_button_new_tab);
281 	global_set_key("M-tab",		cmd_previous_button);
282 	global_set_key("backtab",	cmd_previous_button);
283 	global_set_key("tab",		cmd_next_button);
284 
285 	/* === minibuffer map === */
286 	minibuffer_set_key("ret",		cmd_mini_complete_and_exit);
287 	minibuffer_set_key("C-g",		cmd_mini_abort);
288 	minibuffer_set_key("esc",		cmd_mini_abort);
289 	minibuffer_set_key("C-d",		cmd_mini_delete_char);
290 	minibuffer_set_key("del",		cmd_mini_delete_backward_char);
291 	minibuffer_set_key("backspace",		cmd_mini_delete_backward_char);
292 	minibuffer_set_key("C-h",		cmd_mini_delete_backward_char);
293 
294 	minibuffer_set_key("C-b",		cmd_backward_char);
295 	minibuffer_set_key("C-f",		cmd_forward_char);
296 	minibuffer_set_key("<left>",		cmd_backward_char);
297 	minibuffer_set_key("<right>",		cmd_forward_char);
298 	minibuffer_set_key("C-e",		cmd_move_end_of_line);
299 	minibuffer_set_key("C-a",		cmd_move_beginning_of_line);
300 	minibuffer_set_key("<end>",		cmd_move_end_of_line);
301 	minibuffer_set_key("<home>",		cmd_move_beginning_of_line);
302 	minibuffer_set_key("C-k",		cmd_mini_kill_line);
303 
304 	minibuffer_set_key("M-p",		cmd_mini_previous_history_element);
305 	minibuffer_set_key("M-n",		cmd_mini_next_history_element);
306 	minibuffer_set_key("<up>",		cmd_mini_previous_history_element);
307 	minibuffer_set_key("<down>",		cmd_mini_next_history_element);
308 }
309 
310 void
311 config_init(void)
312 {
313 	struct line_face *f;
314 	size_t i, len;
315 
316 	len = sizeof(line_faces)/sizeof(line_faces[0]);
317 	for (i = 0; i < len; ++i) {
318 		f = &line_faces[i];
319 
320 		f->prfx_bg = f->bg = f->trail_bg = -1;
321 		f->prfx_fg = f->fg = f->trail_fg = -1;
322 	}
323 
324 	line_faces[LINE_LINK].fg = COLOR_BLUE;
325 
326 	load_default_keys();
327 }
328 
329 int
330 config_setprfx(const char *name, const char *prfx, const char *cont)
331 {
332 	struct lineprefix *p;
333 	struct mapping *m;
334 
335 	if (!has_prefix(name, "line."))
336 		return 0;
337 	name += 5;
338 
339 	if ((m = mapping_by_name(name)) == NULL)
340 		return 0;
341 
342 	p = &line_prefixes[m->linetype];
343 	p->prfx1 = prfx;
344 	p->prfx2 = cont;
345 
346 	return 1;
347 }
348 
349 int
350 config_setvari(const char *var, int val)
351 {
352 	if (!strcmp(var, "fill-column")) {
353 		if ((fill_column = val) <= 0)
354 			fill_column = INT_MAX;
355 	} else if (!strcmp(var, "olivetti-mode")) {
356 		olivetti_mode = !!val;
357 	} else if (!strcmp(var, "enable-colors")) {
358 		enable_colors = !!val;
359 	} else {
360 		return 0;
361 	}
362 
363 	return 1;
364 }
365 
366 int
367 config_setvars(const char *var, char *val)
368 {
369 	if (!strcmp(var, "new-tab-url")) {
370 		if (new_tab_url != NULL)
371 			free(new_tab_url);
372 		new_tab_url = val;
373 	} else
374 		return 0;
375 	return 1;
376 }
377 
378 int
379 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
380 {
381         struct mapping *m;
382 	struct line_face *f;
383 
384 	if (!strcmp(name, "tabline")) {
385 		if (bg)
386 			tab_face.bg_bg = prfx;
387 		else
388 			tab_face.bg_fg = prfx;
389 	} else if (has_prefix(name, "tabline.")) {
390 		name += 8;
391 
392 		if (!strcmp(name, "tab")) {
393 			if (bg)
394 				tab_face.t_bg = prfx;
395 			else
396 				tab_face.t_fg = prfx;
397 		} else if (!strcmp(name, "current")) {
398 			if (bg)
399 				tab_face.c_bg = prfx;
400 			else
401 				tab_face.c_fg = prfx;
402 		} else
403 			return 0;
404 	} else if (has_prefix(name, "line.")) {
405 		name += 5;
406 
407 		if ((m = mapping_by_name(name)) == NULL)
408 			return 0;
409 
410 		f = &line_faces[m->linetype];
411 
412 		if (bg) {
413 			f->prfx_bg = prfx;
414 			f->bg = line;
415 			f->trail_bg = trail;
416 		} else {
417 			f->prfx_fg = prfx;
418 			f->fg = line;
419 			f->trail_fg = trail;
420 		}
421 	} else if (!strcmp(name, "line")) {
422 		if (bg) {
423 			body_face.lbg = prfx;
424 			body_face.bg  = line;
425 			body_face.rbg = trail;
426 		} else {
427 			body_face.lfg = prfx;
428 			body_face.fg = line;
429 			body_face.rfg = trail;
430 		}
431 	} else if (!strcmp(name, "minibuffer")) {
432 		if (bg)
433 			minibuffer_face.bg = prfx;
434 		else
435 			minibuffer_face.fg = prfx;
436 	} else if (!strcmp(name, "modeline")) {
437 		if (bg)
438 			modeline_face.bg = prfx;
439 		else
440 			modeline_face.fg = prfx;
441 	} else {
442 		return 0;
443 	}
444 
445 	return 1;
446 }
447 
448 int
449 config_setattr(const char *name, int prfx, int line, int trail)
450 {
451 	struct mapping *m;
452 	struct line_face *f;
453 
454 	if (!strcmp(name, "tabline")) {
455 		tab_face.bg_attr = prfx;
456 	} else if (has_prefix(name, "tabline.")) {
457 		name += 8;
458 
459 		if (!strcmp(name, "tab"))
460 			tab_face.t_attr = prfx;
461 		else if (!strcmp(name, "current"))
462 			tab_face.c_attr = prfx;
463 		else
464 			return 0;
465 	} else if (has_prefix(name, "line.")) {
466 		name += 5;
467 
468 		if ((m = mapping_by_name(name)) == NULL)
469 			return 0;
470 
471 		f = &line_faces[m->linetype];
472 
473 		f->prfx_attr = prfx;
474 		f->attr = line;
475 		f->trail_attr = trail;
476 	} else if (!strcmp(name, "minibuffer")) {
477 		minibuffer_face.attr = prfx;
478 	} else if (!strcmp(name, "modeline")) {
479 		modeline_face.attr = prfx;
480 	} else {
481 		return 0;
482 	}
483 
484 	return 1;
485 }
486 
487 static inline void
488 tl_init_pair(int colors, int pair, int f, int b)
489 {
490 	if (f >= colors || !enable_colors)
491 		f = -1;
492 	if (b >= colors || !enable_colors)
493 		b = -1;
494 	init_pair(pair, f, b);
495 }
496 
497 void
498 config_apply_style(void)
499 {
500 	size_t i, colors, len;
501 	struct line_face *f;
502 
503 	colors = COLORS;
504 
505 	len = sizeof(line_faces)/sizeof(line_faces[0]);
506 	for (i = 0; i < len; ++i) {
507 		f = &line_faces[i];
508 
509 		tl_init_pair(colors, f->prfx_pair, f->prfx_fg, f->prfx_bg);
510 		f->prefix = COLOR_PAIR(f->prfx_pair) | f->prfx_attr;
511 
512 		tl_init_pair(colors, f->pair, f->fg, f->bg);
513 		f->text = COLOR_PAIR(f->pair) | f->attr;
514 
515 		tl_init_pair(colors, f->trail_pair, f->trail_fg, f->trail_bg);
516 		f->trail = COLOR_PAIR(f->trail_pair) | f->trail_attr;
517 	}
518 
519 	/* tab line */
520 	tl_init_pair(colors, PTL_BG, tab_face.bg_fg, tab_face.bg_bg);
521 	tab_face.background = COLOR_PAIR(PTL_BG) | tab_face.bg_attr;
522 
523 	tl_init_pair(colors, PTL_TAB, tab_face.t_fg, tab_face.t_bg);
524 	tab_face.tab = COLOR_PAIR(PTL_TAB) | tab_face.t_attr;
525 
526 	tl_init_pair(colors, PTL_CURR, tab_face.c_fg, tab_face.c_bg);
527 	tab_face.current = COLOR_PAIR(PTL_CURR) | tab_face.c_attr;
528 
529 	/* body */
530 	tl_init_pair(colors, PBODY, body_face.fg, body_face.bg);
531 	body_face.body = COLOR_PAIR(PBODY);
532 
533 	tl_init_pair(colors, PBLEFT, body_face.lfg, body_face.lbg);
534 	body_face.left = COLOR_PAIR(PBLEFT);
535 
536 	tl_init_pair(colors, PBRIGHT, body_face.rfg, body_face.rbg);
537 	body_face.right = COLOR_PAIR(PBRIGHT);
538 
539 	/* modeline */
540 	tl_init_pair(colors, PMODELINE, modeline_face.fg, modeline_face.bg);
541 	modeline_face.background = COLOR_PAIR(PMODELINE) | modeline_face.attr;
542 
543 	/* minibuffer */
544 	tl_init_pair(colors, PMINIBUF, minibuffer_face.fg, minibuffer_face.bg);
545 	minibuffer_face.background = COLOR_PAIR(PMINIBUF) | minibuffer_face.attr;
546 
547 }