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Date:: Thu Jul 15 16:16:35 2021 UTC
Message:: bind C-z, <home> and <end>
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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 "defaults.h"
24 #include "telescope.h"
25 #include "ui.h"
26 
27 char *new_tab_url = NULL;
28 int fill_column = 80;
29 int olivetti_mode = 1;
30 int enable_colors = 1;
31 int hide_pre_context = 0;
32 int hide_pre_blocks = 0;
33 int hide_pre_closing_line = 0;
34 
35 struct lineprefix line_prefixes[] = {
36 	[LINE_TEXT] =		{ "",		"" },
37 	[LINE_LINK] =		{ "=> ",	"   " },
38 	[LINE_TITLE_1] =	{ "# ",		"  " },
39 	[LINE_TITLE_2] =	{ "## ",	"   " },
40 	[LINE_TITLE_3] =	{ "### ",	"    " },
41 	[LINE_ITEM] =		{ "* ",		"  " },
42 	[LINE_QUOTE] =		{ "> ",		"  " },
43 	[LINE_PRE_START] =	{ "```",	"   " },
44 	[LINE_PRE_CONTENT] =	{ "",		"" },
45 	[LINE_PRE_END] =	{ "```",	"```" },
46 
47 	[LINE_COMPL] =		{"", ""},
48 	[LINE_COMPL_CURRENT] =	{"", ""},
49 };
50 
51 struct line_face line_faces[] = {
52 	[LINE_TEXT] =		{
53 		.prfx_pair = PT_PRFX,
54 		.pair = PT,
55 		.trail_pair = PT_TRAIL,
56 	},
57 	[LINE_LINK] =		{
58 		.prfx_pair = PL_PRFX,
59 		.pair = PL,
60 		.trail_pair = PL_TRAIL,
61 		.attr = A_UNDERLINE,
62 	},
63 	[LINE_TITLE_1] =	{
64 		.prfx_pair = PT1_PRFX,
65 		.pair = PT1,
66 		.trail_pair = PT1_TRAIL,
67 		.attr = A_BOLD,
68 	},
69 	[LINE_TITLE_2] =	{
70 		.prfx_pair = PT2_PRFX,
71 		.pair = PT2,
72 		.trail_pair = PT2_TRAIL,
73 		.attr = A_BOLD,
74 	},
75 	[LINE_TITLE_3] =	{
76 		.prfx_pair = PT3_PRFX,
77 		.pair = PT3,
78 		.trail_pair = PT3_TRAIL,
79 		.attr = A_BOLD,
80 	},
81 	[LINE_ITEM] =		{
82 		.prfx_pair = PI_PRFX,
83 		.pair = PI,
84 		.trail_pair = PI_TRAIL,
85 	},
86 	[LINE_QUOTE] =		{
87 		.prfx_pair = PQ_PRFX,
88 		.pair = PQ,
89 		.trail_pair = PQ_TRAIL,
90 		.attr = A_DIM,
91 	},
92 	[LINE_PRE_START] =	{
93 		.prfx_pair = PPSTART_PRFX,
94 		.pair = PPSTART,
95 		.trail_pair = PPSTART_TRAIL,
96 	},
97 	[LINE_PRE_CONTENT] =	{
98 		.prfx_pair = PP_PRFX,
99 		.pair = PP,
100 		.trail_pair = PP_TRAIL,
101 	},
102 	[LINE_PRE_END] =	{
103 		.prfx_pair = PPEND_PRFX,
104 		.pair = PPEND,
105 		.trail_pair = PPEND_TRAIL,
106 	},
107 
108 	/* minibuffer */
109 	[LINE_COMPL] = {
110 		.prfx_pair = PCOMPL_PRFX,
111 		.pair = PCOMPL,
112 		.trail_pair = PCOMPL_TRAIL,
113 	},
114 	[LINE_COMPL_CURRENT] = {
115 		.prfx_pair = PCOMPL_CURR_PRFX,
116 		.pair = PCOMPL_CURR,
117 		.trail_pair = PCOMPL_CURR_TRAIL,
118 		.attr = A_REVERSE,
119 		.trail_attr = A_REVERSE,
120 	},
121 };
122 
123 struct tab_face tab_face = {
124 	.bg_attr = A_REVERSE, .bg_bg = -1, .bg_fg = -1,
125 	.t_attr  = A_REVERSE, .t_bg  = -1, .t_fg  = -1,
126 	.c_attr  = A_NORMAL,  .c_bg  = -1, .c_fg  = -1,
127 
128 	/*
129 	 * set these so that even when enable-color=0 the bar has some
130 	 * sane defaults.
131 	 */
132 	.background =	A_REVERSE,
133 	.tab =		A_REVERSE,
134 	.current =	A_NORMAL,
135 };
136 
137 struct body_face body_face = {
138 	.lbg = -1, .lfg = -1,
139 	.bg  = -1, .fg  = -1,
140 	.rbg = -1, .rfg = -1,
141 };
142 
143 struct modeline_face modeline_face = {
144 	.bg  = -1,
145 	.fg  = -1,
146 	.attr = A_REVERSE,
147 };
148 
149 struct minibuffer_face minibuffer_face = {
150 	.bg = -1,
151 	.fg = -1,
152 	.attr = A_NORMAL,
153 };
154 
155 struct mapping {
156 	const char	*label;
157 	int		 linetype;
158 } mappings[] = {
159 	{"text",	LINE_TEXT},
160 	{"link",	LINE_LINK},
161 	{"title1",	LINE_TITLE_1},
162 	{"title2",	LINE_TITLE_2},
163 	{"title3",	LINE_TITLE_3},
164 	{"item",	LINE_ITEM},
165 	{"quote",	LINE_QUOTE},
166 	{"pre.start",	LINE_PRE_START},
167 	{"pre",		LINE_PRE_CONTENT},
168 	{"pre.end",	LINE_PRE_END},
169 
170 	/* minibuffer */
171 	{"compl",	LINE_COMPL},
172 	{"compl.current", LINE_COMPL_CURRENT}
173 };
174 
175 static struct mapping *
176 mapping_by_name(const char *name)
177 {
178 	size_t i;
179 
180 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
181 		if (!strcmp(name, mappings[i].label))
182 			return &mappings[i];
183 	}
184 
185 	return NULL;
186 }
187 
188 
189 static inline void
190 global_set_key(const char *key, void (*fn)(struct buffer*))
191 {
192 	if (!kmap_define_key(&global_map, key, fn))
193 		_exit(1);
194 }
195 
196 static inline void
197 minibuffer_set_key(const char *key, void (*fn)(struct buffer*))
198 {
199 	if (!kmap_define_key(&minibuffer_map, key, fn))
200 		_exit(1);
201 }
202 
203 static void
204 load_default_keys(void)
205 {
206 	/* === global map === */
207 
208 	/* emacs */
209 	global_set_key("C-p",		cmd_previous_line);
210 	global_set_key("C-n",		cmd_next_line);
211 	global_set_key("C-f",		cmd_forward_char);
212 	global_set_key("C-b",		cmd_backward_char);
213 	global_set_key("M-{",		cmd_backward_paragraph);
214 	global_set_key("M-}",		cmd_forward_paragraph);
215 	global_set_key("C-a",		cmd_move_beginning_of_line);
216 	global_set_key("C-e",		cmd_move_end_of_line);
217 
218 	global_set_key("M-v",		cmd_scroll_up);
219 	global_set_key("C-v",		cmd_scroll_down);
220 	global_set_key("M-space",	cmd_scroll_up);
221 	global_set_key("space",		cmd_scroll_down);
222 
223 	global_set_key("M-<",		cmd_beginning_of_buffer);
224 	global_set_key("M->",		cmd_end_of_buffer);
225 
226 	global_set_key("C-x C-c",	cmd_kill_telescope);
227 
228 	global_set_key("C-g",		cmd_clear_minibuf);
229 
230 	global_set_key("M-x",		cmd_execute_extended_command);
231 
232 	global_set_key("C-c {",		cmd_dec_fill_column);
233 	global_set_key("C-c }",		cmd_inc_fill_column);
234 
235 	global_set_key("C-c p",		cmd_previous_heading);
236 	global_set_key("C-c n",		cmd_next_heading);
237 
238 	global_set_key(">",		cmd_load_url);
239 	global_set_key("<",		cmd_load_current_url);
240 	global_set_key("C-x C-f",	cmd_load_url);
241 	global_set_key("C-x M-f",	cmd_load_current_url);
242 
243 	global_set_key("C-x t 0",	cmd_tab_close);
244 	global_set_key("C-x t 1",	cmd_tab_close_other);
245 	global_set_key("C-x t 2",	cmd_tab_new);
246 	global_set_key("C-x t o",	cmd_tab_next);
247 	global_set_key("C-x t O",	cmd_tab_previous);
248 	global_set_key("C-x t m",	cmd_tab_move);
249 	global_set_key("C-x t M",	cmd_tab_move_to);
250 
251 	global_set_key("B",		cmd_previous_page);
252 	global_set_key("C-M-b",		cmd_previous_page);
253 	global_set_key("F",		cmd_next_page);
254 	global_set_key("C-M-f",		cmd_next_page);
255 
256 	global_set_key("<f7> a",	cmd_bookmark_page);
257 	global_set_key("<f7> <f7>",	cmd_list_bookmarks);
258 
259 	global_set_key("C-z",		cmd_suspend_telescope);
260 
261 	/* vi/vi-like */
262 	global_set_key("k",		cmd_previous_line);
263 	global_set_key("j",		cmd_next_line);
264 	global_set_key("l",		cmd_forward_char);
265 	global_set_key("h",		cmd_backward_char);
266 	global_set_key("{",		cmd_backward_paragraph);
267 	global_set_key("}",		cmd_forward_paragraph);
268 	global_set_key("^",		cmd_move_beginning_of_line);
269 	global_set_key("$",		cmd_move_end_of_line);
270 
271 	global_set_key("K",		cmd_scroll_line_up);
272 	global_set_key("J",		cmd_scroll_line_down);
273 
274 	global_set_key("g g",		cmd_beginning_of_buffer);
275 	global_set_key("G",		cmd_end_of_buffer);
276 
277 	global_set_key("g D",		cmd_tab_close);
278 	global_set_key("g N",		cmd_tab_new);
279 	global_set_key("g t",		cmd_tab_next);
280 	global_set_key("g T",		cmd_tab_previous);
281 	global_set_key("g M-t",		cmd_tab_move);
282 	global_set_key("g M-T",		cmd_tab_move_to);
283 
284 	global_set_key("H",		cmd_previous_page);
285 	global_set_key("L",		cmd_next_page);
286 
287 	/* tmp */
288 	global_set_key("q",		cmd_kill_telescope);
289 
290 	global_set_key("esc",		cmd_clear_minibuf);
291 
292 	global_set_key(":",		cmd_execute_extended_command);
293 
294 	/* cua */
295 	global_set_key("<up>",		cmd_previous_line);
296 	global_set_key("<down>",	cmd_next_line);
297 	global_set_key("<right>",	cmd_forward_char);
298 	global_set_key("<left>",	cmd_backward_char);
299 	global_set_key("<home>",	cmd_move_beginning_of_line);
300 	global_set_key("<end>",		cmd_move_end_of_line);
301 	global_set_key("<prior>",	cmd_scroll_up);
302 	global_set_key("<next>",	cmd_scroll_down);
303 
304 	global_set_key("C-w",		cmd_tab_close);
305 	global_set_key("C-t",		cmd_tab_new);
306 	global_set_key("M-<prior>",	cmd_tab_previous);
307 	global_set_key("M-<next>",	cmd_tab_next);
308 
309 	global_set_key("M-<left>",	cmd_previous_page);
310 	global_set_key("M-<right>",	cmd_next_page);
311 
312 	global_set_key("<f5>",		cmd_reload_page);
313 	global_set_key("r",		cmd_reload_page);
314 
315 	/* "ncurses standard" */
316 	global_set_key("C-l",		cmd_redraw);
317 
318 	/* global */
319 	global_set_key("<f1>",		cmd_toggle_help);
320 	global_set_key("C-m",		cmd_push_button);
321 	global_set_key("M-enter",	cmd_push_button_new_tab);
322 	global_set_key("M-tab",		cmd_previous_button);
323 	global_set_key("backtab",	cmd_previous_button);
324 	global_set_key("tab",		cmd_next_button);
325 	global_set_key("M-t",		cmd_tab_select);
326 	global_set_key("M-l",		cmd_link_select);
327 	global_set_key("M-/",		cmd_swiper);
328 	global_set_key("t",		cmd_toc);
329 
330 	/* === minibuffer map === */
331 	minibuffer_set_key("ret",		cmd_mini_complete_and_exit);
332 	minibuffer_set_key("C-g",		cmd_mini_abort);
333 	minibuffer_set_key("esc",		cmd_mini_abort);
334 	minibuffer_set_key("C-d",		cmd_mini_delete_char);
335 	minibuffer_set_key("del",		cmd_mini_delete_backward_char);
336 	minibuffer_set_key("backspace",		cmd_mini_delete_backward_char);
337 	minibuffer_set_key("C-h",		cmd_mini_delete_backward_char);
338 
339 	minibuffer_set_key("C-b",		cmd_backward_char);
340 	minibuffer_set_key("C-f",		cmd_forward_char);
341 	minibuffer_set_key("<left>",		cmd_backward_char);
342 	minibuffer_set_key("<right>",		cmd_forward_char);
343 	minibuffer_set_key("C-e",		cmd_move_end_of_line);
344 	minibuffer_set_key("C-a",		cmd_move_beginning_of_line);
345 	minibuffer_set_key("<end>",		cmd_move_end_of_line);
346 	minibuffer_set_key("<home>",		cmd_move_beginning_of_line);
347 	minibuffer_set_key("C-k",		cmd_mini_kill_line);
348 
349 	minibuffer_set_key("M-p",		cmd_mini_previous_history_element);
350 	minibuffer_set_key("M-n",		cmd_mini_next_history_element);
351 
352 	minibuffer_set_key("C-p",		cmd_previous_completion);
353 	minibuffer_set_key("C-n",		cmd_next_completion);
354 	minibuffer_set_key("<up>",		cmd_previous_completion);
355 	minibuffer_set_key("<down>",		cmd_next_completion);
356 
357 	minibuffer_set_key("tab",		cmd_insert_current_candidate);
358 }
359 
360 void
361 config_init(void)
362 {
363 	struct line_face *f;
364 	size_t i, len;
365 
366 	len = sizeof(line_faces)/sizeof(line_faces[0]);
367 	for (i = 0; i < len; ++i) {
368 		f = &line_faces[i];
369 
370 		f->prfx_bg = f->bg = f->trail_bg = -1;
371 		f->prfx_fg = f->fg = f->trail_fg = -1;
372 	}
373 
374 	line_faces[LINE_LINK].fg = COLOR_BLUE;
375 
376 	load_default_keys();
377 }
378 
379 int
380 config_setprfx(const char *name, const char *prfx, const char *cont)
381 {
382 	struct lineprefix *p;
383 	struct mapping *m;
384 
385 	if (!has_prefix(name, "line."))
386 		return 0;
387 	name += 5;
388 
389 	if ((m = mapping_by_name(name)) == NULL)
390 		return 0;
391 
392 	p = &line_prefixes[m->linetype];
393 	p->prfx1 = prfx;
394 	p->prfx2 = cont;
395 
396 	return 1;
397 }
398 
399 int
400 config_setvari(const char *var, int val)
401 {
402 	if (!strcmp(var, "fill-column")) {
403 		if ((fill_column = val) <= 0)
404 			fill_column = INT_MAX;
405 	} else if (!strcmp(var, "olivetti-mode")) {
406 		olivetti_mode = !!val;
407 	} else if (!strcmp(var, "enable-colors")) {
408 		enable_colors = !!val;
409 	} else if (!strcmp(var, "hide-pre-context")) {
410 		hide_pre_context = !!val;
411 	} else if (!strcmp(var, "hide-pre-blocks")) {
412 		hide_pre_blocks = !!val;
413 	} else if (!strcmp(var, "hide-pre-closing-line")) {
414 		hide_pre_closing_line = !!val;
415 	}else {
416 		return 0;
417 	}
418 
419 	return 1;
420 }
421 
422 int
423 config_setvars(const char *var, char *val)
424 {
425 	if (!strcmp(var, "new-tab-url")) {
426 		if (new_tab_url != NULL)
427 			free(new_tab_url);
428 		new_tab_url = val;
429 	} else
430 		return 0;
431 	return 1;
432 }
433 
434 int
435 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
436 {
437         struct mapping *m;
438 	struct line_face *f;
439 
440 	if (!strcmp(name, "tabline")) {
441 		if (bg)
442 			tab_face.bg_bg = prfx;
443 		else
444 			tab_face.bg_fg = prfx;
445 	} else if (has_prefix(name, "tabline.")) {
446 		name += 8;
447 
448 		if (!strcmp(name, "tab")) {
449 			if (bg)
450 				tab_face.t_bg = prfx;
451 			else
452 				tab_face.t_fg = prfx;
453 		} else if (!strcmp(name, "current")) {
454 			if (bg)
455 				tab_face.c_bg = prfx;
456 			else
457 				tab_face.c_fg = prfx;
458 		} else
459 			return 0;
460 	} else if (has_prefix(name, "line.")) {
461 		name += 5;
462 
463 		if ((m = mapping_by_name(name)) == NULL)
464 			return 0;
465 
466 		f = &line_faces[m->linetype];
467 
468 		if (bg) {
469 			f->prfx_bg = prfx;
470 			f->bg = line;
471 			f->trail_bg = trail;
472 		} else {
473 			f->prfx_fg = prfx;
474 			f->fg = line;
475 			f->trail_fg = trail;
476 		}
477 	} else if (!strcmp(name, "line")) {
478 		if (bg) {
479 			body_face.lbg = prfx;
480 			body_face.bg  = line;
481 			body_face.rbg = trail;
482 		} else {
483 			body_face.lfg = prfx;
484 			body_face.fg = line;
485 			body_face.rfg = trail;
486 		}
487 	} else if (!strcmp(name, "minibuffer")) {
488 		if (bg)
489 			minibuffer_face.bg = prfx;
490 		else
491 			minibuffer_face.fg = prfx;
492 	} else if (!strcmp(name, "modeline")) {
493 		if (bg)
494 			modeline_face.bg = prfx;
495 		else
496 			modeline_face.fg = prfx;
497 	} else {
498 		return 0;
499 	}
500 
501 	return 1;
502 }
503 
504 int
505 config_setattr(const char *name, int prfx, int line, int trail)
506 {
507 	struct mapping *m;
508 	struct line_face *f;
509 
510 	if (!strcmp(name, "tabline")) {
511 		tab_face.bg_attr = prfx;
512 	} else if (has_prefix(name, "tabline.")) {
513 		name += 8;
514 
515 		if (!strcmp(name, "tab"))
516 			tab_face.t_attr = prfx;
517 		else if (!strcmp(name, "current"))
518 			tab_face.c_attr = prfx;
519 		else
520 			return 0;
521 	} else if (has_prefix(name, "line.")) {
522 		name += 5;
523 
524 		if ((m = mapping_by_name(name)) == NULL)
525 			return 0;
526 
527 		f = &line_faces[m->linetype];
528 
529 		f->prfx_attr = prfx;
530 		f->attr = line;
531 		f->trail_attr = trail;
532 	} else if (!strcmp(name, "minibuffer")) {
533 		minibuffer_face.attr = prfx;
534 	} else if (!strcmp(name, "modeline")) {
535 		modeline_face.attr = prfx;
536 	} else {
537 		return 0;
538 	}
539 
540 	return 1;
541 }
542 
543 static inline void
544 tl_init_pair(int colors, int pair, int f, int b)
545 {
546 	if (f >= colors || !enable_colors)
547 		f = -1;
548 	if (b >= colors || !enable_colors)
549 		b = -1;
550 	init_pair(pair, f, b);
551 }
552 
553 void
554 config_apply_style(void)
555 {
556 	size_t i, colors, len;
557 	struct line_face *f;
558 
559 	colors = COLORS;
560 
561 	len = sizeof(line_faces)/sizeof(line_faces[0]);
562 	for (i = 0; i < len; ++i) {
563 		f = &line_faces[i];
564 
565 		tl_init_pair(colors, f->prfx_pair, f->prfx_fg, f->prfx_bg);
566 		f->prefix = COLOR_PAIR(f->prfx_pair) | f->prfx_attr;
567 
568 		tl_init_pair(colors, f->pair, f->fg, f->bg);
569 		f->text = COLOR_PAIR(f->pair) | f->attr;
570 
571 		tl_init_pair(colors, f->trail_pair, f->trail_fg, f->trail_bg);
572 		f->trail = COLOR_PAIR(f->trail_pair) | f->trail_attr;
573 	}
574 
575 	/* tab line */
576 	tl_init_pair(colors, PTL_BG, tab_face.bg_fg, tab_face.bg_bg);
577 	tab_face.background = COLOR_PAIR(PTL_BG) | tab_face.bg_attr;
578 
579 	tl_init_pair(colors, PTL_TAB, tab_face.t_fg, tab_face.t_bg);
580 	tab_face.tab = COLOR_PAIR(PTL_TAB) | tab_face.t_attr;
581 
582 	tl_init_pair(colors, PTL_CURR, tab_face.c_fg, tab_face.c_bg);
583 	tab_face.current = COLOR_PAIR(PTL_CURR) | tab_face.c_attr;
584 
585 	/* body */
586 	tl_init_pair(colors, PBODY, body_face.fg, body_face.bg);
587 	body_face.body = COLOR_PAIR(PBODY);
588 
589 	tl_init_pair(colors, PBLEFT, body_face.lfg, body_face.lbg);
590 	body_face.left = COLOR_PAIR(PBLEFT);
591 
592 	tl_init_pair(colors, PBRIGHT, body_face.rfg, body_face.rbg);
593 	body_face.right = COLOR_PAIR(PBRIGHT);
594 
595 	/* modeline */
596 	tl_init_pair(colors, PMODELINE, modeline_face.fg, modeline_face.bg);
597 	modeline_face.background = COLOR_PAIR(PMODELINE) | modeline_face.attr;
598 
599 	/* minibuffer */
600 	tl_init_pair(colors, PMINIBUF, minibuffer_face.fg, minibuffer_face.bg);
601 	minibuffer_face.background = COLOR_PAIR(PMINIBUF) | minibuffer_face.attr;
602 
603 }