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Date:: Tue Jul 13 13:15:47 2021 UTC
Message:: bind and advertise B/F for previous/next-page instead of C-M-bf/b
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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 <curses.h>
18 #include <limits.h>
19 #include <stdlib.h>
20 #include <string.h>
21 #include <unistd.h>
22 
23 #include "telescope.h"
24 #include "ui.h"
25 
26 char *new_tab_url = NULL;
27 int fill_column = 80;
28 int olivetti_mode = 1;
29 int enable_colors = 1;
30 int hide_pre_context = 0;
31 int hide_pre_blocks = 0;
32 
33 struct lineprefix line_prefixes[] = {
34 	[LINE_TEXT] =		{ "",		"" },
35 	[LINE_LINK] =		{ "=> ",	"   " },
36 	[LINE_TITLE_1] =	{ "# ",		"  " },
37 	[LINE_TITLE_2] =	{ "## ",	"   " },
38 	[LINE_TITLE_3] =	{ "### ",	"    " },
39 	[LINE_ITEM] =		{ "* ",		"  " },
40 	[LINE_QUOTE] =		{ "> ",		"  " },
41 	[LINE_PRE_START] =	{ "```",	"   " },
42 	[LINE_PRE_CONTENT] =	{ "",		"" },
43 	[LINE_PRE_END] =	{ "```",	"```" },
44 };
45 
46 struct line_face line_faces[] = {
47 	[LINE_TEXT] =		{
48 		.prfx_pair = PT_PRFX,
49 		.pair = PT,
50 		.trail_pair = PT_TRAIL,
51 	},
52 	[LINE_LINK] =		{
53 		.prfx_pair = PL_PRFX,
54 		.pair = PL,
55 		.trail_pair = PL_TRAIL,
56 		.attr = A_UNDERLINE,
57 	},
58 	[LINE_TITLE_1] =	{
59 		.prfx_pair = PT1_PRFX,
60 		.pair = PT1,
61 		.trail_pair = PT1_TRAIL,
62 		.attr = A_BOLD,
63 	},
64 	[LINE_TITLE_2] =	{
65 		.prfx_pair = PT2_PRFX,
66 		.pair = PT2,
67 		.trail_pair = PT2_TRAIL,
68 		.attr = A_BOLD,
69 	},
70 	[LINE_TITLE_3] =	{
71 		.prfx_pair = PT3_PRFX,
72 		.pair = PT3,
73 		.trail_pair = PT3_TRAIL,
74 		.attr = A_BOLD,
75 	},
76 	[LINE_ITEM] =		{
77 		.prfx_pair = PI_PRFX,
78 		.pair = PI,
79 		.trail_pair = PI_TRAIL,
80 	},
81 	[LINE_QUOTE] =		{
82 		.prfx_pair = PQ_PRFX,
83 		.pair = PQ,
84 		.trail_pair = PQ_TRAIL,
85 		.attr = A_DIM,
86 	},
87 	[LINE_PRE_START] =	{
88 		.prfx_pair = PPSTART_PRFX,
89 		.pair = PPSTART,
90 		.trail_pair = PPSTART_TRAIL,
91 	},
92 	[LINE_PRE_CONTENT] =	{
93 		.prfx_pair = PP_PRFX,
94 		.pair = PP,
95 		.trail_pair = PP_TRAIL,
96 	},
97 	[LINE_PRE_END] =	{
98 		.prfx_pair = PPEND_PRFX,
99 		.pair = PPEND,
100 		.trail_pair = PPEND_TRAIL,
101 	},
102 };
103 
104 struct tab_face tab_face = {
105 	.bg_attr = A_REVERSE, .bg_bg = -1, .bg_fg = -1,
106 	.t_attr  = A_REVERSE, .t_bg  = -1, .t_fg  = -1,
107 	.c_attr  = A_NORMAL,  .c_bg  = -1, .c_fg  = -1,
108 
109 	/*
110 	 * set these so that even when enable-color=0 the bar has some
111 	 * sane defaults.
112 	 */
113 	.background =	A_REVERSE,
114 	.tab =		A_REVERSE,
115 	.current =	A_NORMAL,
116 };
117 
118 struct body_face body_face = {
119 	.lbg = -1, .lfg = -1,
120 	.bg  = -1, .fg  = -1,
121 	.rbg = -1, .rfg = -1,
122 };
123 
124 struct modeline_face modeline_face = {
125 	.bg  = -1,
126 	.fg  = -1,
127 	.attr = A_REVERSE,
128 };
129 
130 struct minibuffer_face minibuffer_face = {
131 	.bg = -1,
132 	.fg = -1,
133 	.attr = A_NORMAL,
134 };
135 
136 struct mapping {
137 	const char	*label;
138 	int		 linetype;
139 } mappings[] = {
140 	{"text",	LINE_TEXT},
141 	{"link",	LINE_LINK},
142 	{"title1",	LINE_TITLE_1},
143 	{"title2",	LINE_TITLE_2},
144 	{"title3",	LINE_TITLE_3},
145 	{"item",	LINE_ITEM},
146 	{"quote",	LINE_QUOTE},
147 	{"pre.start",	LINE_PRE_START},
148 	{"pre",		LINE_PRE_CONTENT},
149 	{"pre.end",	LINE_PRE_END},
150 };
151 
152 static struct mapping *
153 mapping_by_name(const char *name)
154 {
155 	size_t i;
156 
157 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
158 		if (!strcmp(name, mappings[i].label))
159 			return &mappings[i];
160 	}
161 
162 	return NULL;
163 }
164 
165 
166 static inline void
167 global_set_key(const char *key, void (*fn)(struct buffer*))
168 {
169 	if (!kmap_define_key(&global_map, key, fn))
170 		_exit(1);
171 }
172 
173 static inline void
174 minibuffer_set_key(const char *key, void (*fn)(struct buffer*))
175 {
176 	if (!kmap_define_key(&minibuffer_map, key, fn))
177 		_exit(1);
178 }
179 
180 static void
181 load_default_keys(void)
182 {
183 	/* === global map === */
184 
185 	/* emacs */
186 	global_set_key("C-p",		cmd_previous_line);
187 	global_set_key("C-n",		cmd_next_line);
188 	global_set_key("C-f",		cmd_forward_char);
189 	global_set_key("C-b",		cmd_backward_char);
190 	global_set_key("M-{",		cmd_backward_paragraph);
191 	global_set_key("M-}",		cmd_forward_paragraph);
192 	global_set_key("C-a",		cmd_move_beginning_of_line);
193 	global_set_key("C-e",		cmd_move_end_of_line);
194 
195 	global_set_key("M-v",		cmd_scroll_up);
196 	global_set_key("C-v",		cmd_scroll_down);
197 	global_set_key("M-space",	cmd_scroll_up);
198 	global_set_key("space",		cmd_scroll_down);
199 
200 	global_set_key("M-<",		cmd_beginning_of_buffer);
201 	global_set_key("M->",		cmd_end_of_buffer);
202 
203 	global_set_key("C-x C-c",	cmd_kill_telescope);
204 
205 	global_set_key("C-g",		cmd_clear_minibuf);
206 
207 	global_set_key("M-x",		cmd_execute_extended_command);
208 
209 	global_set_key("C-c {",		cmd_dec_fill_column);
210 	global_set_key("C-c }",		cmd_inc_fill_column);
211 
212 	global_set_key("C-c p",		cmd_previous_heading);
213 	global_set_key("C-c n",		cmd_next_heading);
214 
215 	global_set_key(">",		cmd_load_url);
216 	global_set_key("C-x C-f",	cmd_load_url);
217 	global_set_key("C-x M-f",	cmd_load_current_url);
218 
219 	global_set_key("C-x t 0",	cmd_tab_close);
220 	global_set_key("C-x t 1",	cmd_tab_close_other);
221 	global_set_key("C-x t 2",	cmd_tab_new);
222 	global_set_key("C-x t o",	cmd_tab_next);
223 	global_set_key("C-x t O",	cmd_tab_previous);
224 	global_set_key("C-x t m",	cmd_tab_move);
225 	global_set_key("C-x t M",	cmd_tab_move_to);
226 
227 	global_set_key("B",		cmd_previous_page);
228 	global_set_key("C-M-b",		cmd_previous_page);
229 	global_set_key("F",		cmd_next_page);
230 	global_set_key("C-M-f",		cmd_next_page);
231 
232 	global_set_key("<f7> a",	cmd_bookmark_page);
233 	global_set_key("<f7> <f7>",	cmd_list_bookmarks);
234 
235 	/* vi/vi-like */
236 	global_set_key("k",		cmd_previous_line);
237 	global_set_key("j",		cmd_next_line);
238 	global_set_key("l",		cmd_forward_char);
239 	global_set_key("h",		cmd_backward_char);
240 	global_set_key("{",		cmd_backward_paragraph);
241 	global_set_key("}",		cmd_forward_paragraph);
242 	global_set_key("^",		cmd_move_beginning_of_line);
243 	global_set_key("$",		cmd_move_end_of_line);
244 
245 	global_set_key("K",		cmd_scroll_line_up);
246 	global_set_key("J",		cmd_scroll_line_down);
247 
248 	global_set_key("g g",		cmd_beginning_of_buffer);
249 	global_set_key("G",		cmd_end_of_buffer);
250 
251 	global_set_key("g D",		cmd_tab_close);
252 	global_set_key("g N",		cmd_tab_new);
253 	global_set_key("g t",		cmd_tab_next);
254 	global_set_key("g T",		cmd_tab_previous);
255 	global_set_key("g M-t",		cmd_tab_move);
256 	global_set_key("g M-T",		cmd_tab_move_to);
257 
258 	global_set_key("H",		cmd_previous_page);
259 	global_set_key("L",		cmd_next_page);
260 
261 	/* tmp */
262 	global_set_key("q",		cmd_kill_telescope);
263 
264 	global_set_key("esc",		cmd_clear_minibuf);
265 
266 	global_set_key(":",		cmd_execute_extended_command);
267 
268 	/* cua */
269 	global_set_key("<up>",		cmd_previous_line);
270 	global_set_key("<down>",	cmd_next_line);
271 	global_set_key("<right>",	cmd_forward_char);
272 	global_set_key("<left>",	cmd_backward_char);
273 	global_set_key("<prior>",	cmd_scroll_up);
274 	global_set_key("<next>",	cmd_scroll_down);
275 
276 	global_set_key("C-w",		cmd_tab_close);
277 	global_set_key("C-t",		cmd_tab_new);
278 	global_set_key("M-<prior>",	cmd_tab_previous);
279 	global_set_key("M-<next>",	cmd_tab_next);
280 
281 	global_set_key("M-<left>",	cmd_previous_page);
282 	global_set_key("M-<right>",	cmd_next_page);
283 
284 	/* "ncurses standard" */
285 	global_set_key("C-l",		cmd_redraw);
286 
287 	/* global */
288 	global_set_key("<f1>",		cmd_toggle_help);
289 	global_set_key("C-m",		cmd_push_button);
290 	global_set_key("M-enter",	cmd_push_button_new_tab);
291 	global_set_key("M-tab",		cmd_previous_button);
292 	global_set_key("backtab",	cmd_previous_button);
293 	global_set_key("tab",		cmd_next_button);
294 
295 	/* === minibuffer map === */
296 	minibuffer_set_key("ret",		cmd_mini_complete_and_exit);
297 	minibuffer_set_key("C-g",		cmd_mini_abort);
298 	minibuffer_set_key("esc",		cmd_mini_abort);
299 	minibuffer_set_key("C-d",		cmd_mini_delete_char);
300 	minibuffer_set_key("del",		cmd_mini_delete_backward_char);
301 	minibuffer_set_key("backspace",		cmd_mini_delete_backward_char);
302 	minibuffer_set_key("C-h",		cmd_mini_delete_backward_char);
303 
304 	minibuffer_set_key("C-b",		cmd_backward_char);
305 	minibuffer_set_key("C-f",		cmd_forward_char);
306 	minibuffer_set_key("<left>",		cmd_backward_char);
307 	minibuffer_set_key("<right>",		cmd_forward_char);
308 	minibuffer_set_key("C-e",		cmd_move_end_of_line);
309 	minibuffer_set_key("C-a",		cmd_move_beginning_of_line);
310 	minibuffer_set_key("<end>",		cmd_move_end_of_line);
311 	minibuffer_set_key("<home>",		cmd_move_beginning_of_line);
312 	minibuffer_set_key("C-k",		cmd_mini_kill_line);
313 
314 	minibuffer_set_key("M-p",		cmd_mini_previous_history_element);
315 	minibuffer_set_key("M-n",		cmd_mini_next_history_element);
316 	minibuffer_set_key("<up>",		cmd_mini_previous_history_element);
317 	minibuffer_set_key("<down>",		cmd_mini_next_history_element);
318 }
319 
320 void
321 config_init(void)
322 {
323 	struct line_face *f;
324 	size_t i, len;
325 
326 	len = sizeof(line_faces)/sizeof(line_faces[0]);
327 	for (i = 0; i < len; ++i) {
328 		f = &line_faces[i];
329 
330 		f->prfx_bg = f->bg = f->trail_bg = -1;
331 		f->prfx_fg = f->fg = f->trail_fg = -1;
332 	}
333 
334 	line_faces[LINE_LINK].fg = COLOR_BLUE;
335 
336 	load_default_keys();
337 }
338 
339 int
340 config_setprfx(const char *name, const char *prfx, const char *cont)
341 {
342 	struct lineprefix *p;
343 	struct mapping *m;
344 
345 	if (!has_prefix(name, "line."))
346 		return 0;
347 	name += 5;
348 
349 	if ((m = mapping_by_name(name)) == NULL)
350 		return 0;
351 
352 	p = &line_prefixes[m->linetype];
353 	p->prfx1 = prfx;
354 	p->prfx2 = cont;
355 
356 	return 1;
357 }
358 
359 int
360 config_setvari(const char *var, int val)
361 {
362 	if (!strcmp(var, "fill-column")) {
363 		if ((fill_column = val) <= 0)
364 			fill_column = INT_MAX;
365 	} else if (!strcmp(var, "olivetti-mode")) {
366 		olivetti_mode = !!val;
367 	} else if (!strcmp(var, "enable-colors")) {
368 		enable_colors = !!val;
369 	} else if (!strcmp(var, "hide-pre-context")) {
370 		hide_pre_context = !!val;
371 	} else if (!strcmp(var, "hide-pre-blocks")) {
372 		hide_pre_blocks = !!val;
373 	} else {
374 		return 0;
375 	}
376 
377 	return 1;
378 }
379 
380 int
381 config_setvars(const char *var, char *val)
382 {
383 	if (!strcmp(var, "new-tab-url")) {
384 		if (new_tab_url != NULL)
385 			free(new_tab_url);
386 		new_tab_url = val;
387 	} else
388 		return 0;
389 	return 1;
390 }
391 
392 int
393 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
394 {
395         struct mapping *m;
396 	struct line_face *f;
397 
398 	if (!strcmp(name, "tabline")) {
399 		if (bg)
400 			tab_face.bg_bg = prfx;
401 		else
402 			tab_face.bg_fg = prfx;
403 	} else if (has_prefix(name, "tabline.")) {
404 		name += 8;
405 
406 		if (!strcmp(name, "tab")) {
407 			if (bg)
408 				tab_face.t_bg = prfx;
409 			else
410 				tab_face.t_fg = prfx;
411 		} else if (!strcmp(name, "current")) {
412 			if (bg)
413 				tab_face.c_bg = prfx;
414 			else
415 				tab_face.c_fg = prfx;
416 		} else
417 			return 0;
418 	} else if (has_prefix(name, "line.")) {
419 		name += 5;
420 
421 		if ((m = mapping_by_name(name)) == NULL)
422 			return 0;
423 
424 		f = &line_faces[m->linetype];
425 
426 		if (bg) {
427 			f->prfx_bg = prfx;
428 			f->bg = line;
429 			f->trail_bg = trail;
430 		} else {
431 			f->prfx_fg = prfx;
432 			f->fg = line;
433 			f->trail_fg = trail;
434 		}
435 	} else if (!strcmp(name, "line")) {
436 		if (bg) {
437 			body_face.lbg = prfx;
438 			body_face.bg  = line;
439 			body_face.rbg = trail;
440 		} else {
441 			body_face.lfg = prfx;
442 			body_face.fg = line;
443 			body_face.rfg = trail;
444 		}
445 	} else if (!strcmp(name, "minibuffer")) {
446 		if (bg)
447 			minibuffer_face.bg = prfx;
448 		else
449 			minibuffer_face.fg = prfx;
450 	} else if (!strcmp(name, "modeline")) {
451 		if (bg)
452 			modeline_face.bg = prfx;
453 		else
454 			modeline_face.fg = prfx;
455 	} else {
456 		return 0;
457 	}
458 
459 	return 1;
460 }
461 
462 int
463 config_setattr(const char *name, int prfx, int line, int trail)
464 {
465 	struct mapping *m;
466 	struct line_face *f;
467 
468 	if (!strcmp(name, "tabline")) {
469 		tab_face.bg_attr = prfx;
470 	} else if (has_prefix(name, "tabline.")) {
471 		name += 8;
472 
473 		if (!strcmp(name, "tab"))
474 			tab_face.t_attr = prfx;
475 		else if (!strcmp(name, "current"))
476 			tab_face.c_attr = prfx;
477 		else
478 			return 0;
479 	} else if (has_prefix(name, "line.")) {
480 		name += 5;
481 
482 		if ((m = mapping_by_name(name)) == NULL)
483 			return 0;
484 
485 		f = &line_faces[m->linetype];
486 
487 		f->prfx_attr = prfx;
488 		f->attr = line;
489 		f->trail_attr = trail;
490 	} else if (!strcmp(name, "minibuffer")) {
491 		minibuffer_face.attr = prfx;
492 	} else if (!strcmp(name, "modeline")) {
493 		modeline_face.attr = prfx;
494 	} else {
495 		return 0;
496 	}
497 
498 	return 1;
499 }
500 
501 static inline void
502 tl_init_pair(int colors, int pair, int f, int b)
503 {
504 	if (f >= colors || !enable_colors)
505 		f = -1;
506 	if (b >= colors || !enable_colors)
507 		b = -1;
508 	init_pair(pair, f, b);
509 }
510 
511 void
512 config_apply_style(void)
513 {
514 	size_t i, colors, len;
515 	struct line_face *f;
516 
517 	colors = COLORS;
518 
519 	len = sizeof(line_faces)/sizeof(line_faces[0]);
520 	for (i = 0; i < len; ++i) {
521 		f = &line_faces[i];
522 
523 		tl_init_pair(colors, f->prfx_pair, f->prfx_fg, f->prfx_bg);
524 		f->prefix = COLOR_PAIR(f->prfx_pair) | f->prfx_attr;
525 
526 		tl_init_pair(colors, f->pair, f->fg, f->bg);
527 		f->text = COLOR_PAIR(f->pair) | f->attr;
528 
529 		tl_init_pair(colors, f->trail_pair, f->trail_fg, f->trail_bg);
530 		f->trail = COLOR_PAIR(f->trail_pair) | f->trail_attr;
531 	}
532 
533 	/* tab line */
534 	tl_init_pair(colors, PTL_BG, tab_face.bg_fg, tab_face.bg_bg);
535 	tab_face.background = COLOR_PAIR(PTL_BG) | tab_face.bg_attr;
536 
537 	tl_init_pair(colors, PTL_TAB, tab_face.t_fg, tab_face.t_bg);
538 	tab_face.tab = COLOR_PAIR(PTL_TAB) | tab_face.t_attr;
539 
540 	tl_init_pair(colors, PTL_CURR, tab_face.c_fg, tab_face.c_bg);
541 	tab_face.current = COLOR_PAIR(PTL_CURR) | tab_face.c_attr;
542 
543 	/* body */
544 	tl_init_pair(colors, PBODY, body_face.fg, body_face.bg);
545 	body_face.body = COLOR_PAIR(PBODY);
546 
547 	tl_init_pair(colors, PBLEFT, body_face.lfg, body_face.lbg);
548 	body_face.left = COLOR_PAIR(PBLEFT);
549 
550 	tl_init_pair(colors, PBRIGHT, body_face.rfg, body_face.rbg);
551 	body_face.right = COLOR_PAIR(PBRIGHT);
552 
553 	/* modeline */
554 	tl_init_pair(colors, PMODELINE, modeline_face.fg, modeline_face.bg);
555 	modeline_face.background = COLOR_PAIR(PMODELINE) | modeline_face.attr;
556 
557 	/* minibuffer */
558 	tl_init_pair(colors, PMINIBUF, minibuffer_face.fg, minibuffer_face.bg);
559 	minibuffer_face.background = COLOR_PAIR(PMINIBUF) | minibuffer_face.attr;
560 
561 }