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 
24 char *new_tab_url = NULL;
25 int fill_column = INT_MAX;
26 int olivetti_mode = 0;
27 int enable_colors = 1;
28 
29 static struct lineface_descr {
30 	int	prfx_used, used;
31 	int	prfx_pair, pair;
32 	int	prfx_bg, bg;
33 	int	prfx_fg, fg;
34 } linefaces_descr[] = {
35 	[LINE_TEXT] =		{ 0, 0, PAIR_TEXT_PRFX,		PAIR_TEXT,	0, 0, 0, 0 },
36 	[LINE_LINK] =		{ 0, 0, PAIR_LINK_PRFX,		PAIR_LINK,	0, 0, 0, 0 },
37 	[LINE_TITLE_1] =	{ 0, 0, PAIR_TITLE_1_PRFX,	PAIR_TITLE_1,	0, 0, 0, 0 },
38 	[LINE_TITLE_2] =	{ 0, 0, PAIR_TITLE_2_PRFX,	PAIR_TITLE_1,	0, 0, 0, 0 },
39 	[LINE_TITLE_3] =	{ 0, 0, PAIR_TITLE_3_PRFX,	PAIR_TITLE_3,	0, 0, 0, 0 },
40 	[LINE_ITEM] =		{ 0, 0, PAIR_ITEM_PRFX,		PAIR_ITEM,	0, 0, 0, 0 },
41 	[LINE_QUOTE] =		{ 0, 0, PAIR_QUOTE_PRFX,	PAIR_QUOTE,	0, 0, 0, 0 },
42 	[LINE_PRE_START] =	{ 0, 0, PAIR_PRE_START_PRFX,	PAIR_TEXT,	0, 0, 0, 0 },
43 	[LINE_PRE_CONTENT] =	{ 0, 0, PAIR_PRE_PRFX,		PAIR_PRE,	0, 0, 0, 0 },
44 	[LINE_PRE_END] =	{ 0, 0, PAIR_PRE_END_PRFX,	PAIR_PRE_END,	0, 0, 0, 0 },
45 };
46 
47 struct lineprefix line_prefixes[] = {
48 	[LINE_TEXT] =		{ "",		"" },
49 	[LINE_LINK] =		{ "=> ",	"   " },
50 	[LINE_TITLE_1] =	{ "# ",		"  " },
51 	[LINE_TITLE_2] =	{ "## ",	"   " },
52 	[LINE_TITLE_3] =	{ "### ",	"    " },
53 	[LINE_ITEM] =		{ "* ",		"  " },
54 	[LINE_QUOTE] =		{ "> ",		"  " },
55 	[LINE_PRE_START] =	{ "```",	"   " },
56 	[LINE_PRE_CONTENT] =	{ "",		"" },
57 	[LINE_PRE_END] =	{ "```",	"```" },
58 };
59 
60 struct line_face line_faces[] = {
61 	[LINE_TEXT] =		{ 0,		0 },
62 	[LINE_LINK] =		{ 0,		A_UNDERLINE },
63 	[LINE_TITLE_1] =	{ A_BOLD,	A_BOLD },
64 	[LINE_TITLE_2] =	{ A_BOLD,	A_BOLD },
65 	[LINE_TITLE_3] =	{ A_BOLD,	A_BOLD },
66 	[LINE_ITEM] =		{ 0,		0 },
67 	[LINE_QUOTE] =		{ 0,		A_DIM },
68 	[LINE_PRE_START] =	{ 0,		0 },
69 	[LINE_PRE_CONTENT] =	{ 0,		0 },
70 	[LINE_PRE_END] =	{ 0,		0 },
71 };
72 
73 struct tab_face tab_face = {
74 	.background	= A_REVERSE,
75 	.tab		= A_REVERSE,
76 	.current_tab	= A_NORMAL,
77 };
78 
79 struct modeline_face modeline_face = {
80 	.background = A_REVERSE,
81 };
82 
83 struct minibuffer_face minibuffer_face = {
84 	.background = A_NORMAL,
85 };
86 
87 struct mapping {
88 	const char	*label;
89 	int		 linetype;
90 	int		 facetype;
91 	int		 facetype_prfx;
92 } mappings[] = {
93 	{"text",	LINE_TEXT,		PAIR_TEXT,	PAIR_TEXT_PRFX},
94 	{"link",	LINE_LINK,		PAIR_LINK,	PAIR_LINK_PRFX},
95 	{"title1",	LINE_TITLE_1,		PAIR_TITLE_1,	PAIR_TITLE_1_PRFX},
96 	{"title2",	LINE_TITLE_2,		PAIR_TITLE_2,	PAIR_TITLE_2_PRFX},
97 	{"title3",	LINE_TITLE_3,		PAIR_TITLE_3,	PAIR_TITLE_3_PRFX},
98 	{"item",	LINE_ITEM,		PAIR_ITEM,	PAIR_ITEM_PRFX},
99 	{"quote",	LINE_QUOTE,		PAIR_QUOTE,	PAIR_QUOTE_PRFX},
100 	{"pre.start",	LINE_PRE_START,		PAIR_PRE_START,	PAIR_PRE_START_PRFX},
101 	{"pre",		LINE_PRE_CONTENT,	PAIR_PRE,	PAIR_PRE_PRFX},
102 	{"pre.end",	LINE_PRE_END,		PAIR_PRE_END,	PAIR_PRE_END_PRFX},
103 };
104 
105 static struct mapping *
106 mapping_by_name(const char *name)
107 {
108 	size_t i;
109 
110 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
111 		if (!strcmp(name, mappings[i].label))
112 			return &mappings[i];
113 	}
114 
115 	return NULL;
116 }
117 
118 int
119 config_setprfx(const char *name, int cont, const char *str)
120 {
121 	struct lineprefix *p;
122 	struct mapping *m;
123 
124 	if (!has_prefix(name, "line."))
125 		return 0;
126 	name += 5;
127 
128 	if ((m = mapping_by_name(name)) == NULL)
129 		return 0;
130 
131 	p = &line_prefixes[m->linetype];
132 
133 	if (cont)
134 		p->prfx2 = str;
135 	else
136 		p->prfx1 = str;
137 
138 	return 1;
139 }
140 
141 int
142 config_setvari(const char *var, int val)
143 {
144 	if (!strcmp(var, "fill-column")) {
145 		if ((fill_column = val) <= 0)
146 			fill_column = INT_MAX;
147 	} else if (!strcmp(var, "olivetti-mode")) {
148 		olivetti_mode = !!val;
149 	} else if (!strcmp(var, "enable-colors")) {
150 		enable_colors = !!val;
151 	} else {
152 		return 0;
153 	}
154 
155 	return 1;
156 }
157 
158 int
159 config_setvars(const char *var, char *val)
160 {
161 	if (!strcmp(var, "new-tab-url")) {
162 		if (new_tab_url != NULL)
163 			free(new_tab_url);
164 		new_tab_url = val;
165 	} else
166 		return 0;
167 	return 1;
168 }
169 
170 int
171 config_setcolor(const char *name, int prfx, int bg, int color)
172 {
173         struct mapping *m;
174 	struct lineface_descr *d;
175 
176 	if (!has_prefix(name, "line."))
177 		return 0;
178 	name += 5;
179 
180 	if ((m = mapping_by_name(name)) == NULL)
181 		return 0;
182 
183 	d = &linefaces_descr[m->linetype];
184 
185 	if (prfx) {
186 		d->prfx_used = 1;
187 		if (bg)
188 			d->prfx_bg = color;
189 		else
190 			d->prfx_fg = color;
191 	} else {
192 		d->used = 1;
193 		if (bg)
194 			d->bg = color;
195 		else
196 			d->fg = color;
197 	}
198 
199 	return 1;
200 }
201 
202 void
203 config_apply_colors(void)
204 {
205         size_t i, len;
206 	struct lineface_descr *d;
207 	struct line_face *f;
208 
209 	len = sizeof(linefaces_descr)/sizeof(linefaces_descr[0]);
210 	for (i = 0; i < len; ++i) {
211 		d = &linefaces_descr[i];
212 		f = &line_faces[i];
213 
214 		if (d->prfx_used) {
215 			init_pair(d->prfx_pair, d->prfx_fg, d->prfx_bg);
216 			f->prefix_prop = COLOR_PAIR(d->prfx_pair);
217 		}
218 
219 		if (d->used) {
220 			init_pair(d->pair, d->fg, d->bg);
221 			f->text_prop = COLOR_PAIR(d->pair);
222 		}
223 	}
224 }