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	used;
31 	int	pp, p, tp;
32 	int	prfx_bg, bg, trail_bg;
33 	int	prfx_fg, fg, trail_fg;
34 } linefaces_descr[] = {
35 	[LINE_TEXT] =		{.pp=PT_PRFX,		.p=PT,		.tp=PT_TRAIL},
36 	[LINE_LINK] =		{.pp=PL_PRFX,		.p=PL,		.tp=PL_TRAIL},
37 	[LINE_TITLE_1] =	{.pp=PT1_PRFX,		.p=PT1,		.tp=PT1_TRAIL},
38 	[LINE_TITLE_2] =	{.pp=PT2_PRFX,		.p=PT1,		.tp=PT1_TRAIL},
39 	[LINE_TITLE_3] =	{.pp=PT3_PRFX,		.p=PT3,		.tp=PT3_TRAIL},
40 	[LINE_ITEM] =		{.pp=PI_PRFX,		.p=PI,		.tp=PI_TRAIL},
41 	[LINE_QUOTE] =		{.pp=PQ_PRFX,		.p=PQ,		.tp=PQ_TRAIL},
42 	[LINE_PRE_START] =	{.pp=PPSTART_PRFX,	.p=PT,		.tp=PT_TRAIL},
43 	[LINE_PRE_CONTENT] =	{.pp=PP_PRFX,		.p=PP,		.tp=PP_TRAIL},
44 	[LINE_PRE_END] =	{.pp=PPEND_PRFX,	.p=PPEND,	.tp=PPEND_TRAIL},
45 
46 };
47 
48 struct lineprefix line_prefixes[] = {
49 	[LINE_TEXT] =		{ "",		"" },
50 	[LINE_LINK] =		{ "=> ",	"   " },
51 	[LINE_TITLE_1] =	{ "# ",		"  " },
52 	[LINE_TITLE_2] =	{ "## ",	"   " },
53 	[LINE_TITLE_3] =	{ "### ",	"    " },
54 	[LINE_ITEM] =		{ "* ",		"  " },
55 	[LINE_QUOTE] =		{ "> ",		"  " },
56 	[LINE_PRE_START] =	{ "```",	"   " },
57 	[LINE_PRE_CONTENT] =	{ "",		"" },
58 	[LINE_PRE_END] =	{ "```",	"```" },
59 };
60 
61 struct line_face line_faces[] = {
62 	[LINE_TEXT] =		{ 0,		0,		0 },
63 	[LINE_LINK] =		{ 0,		A_UNDERLINE,	0 },
64 	[LINE_TITLE_1] =	{ A_BOLD,	A_BOLD,		0 },
65 	[LINE_TITLE_2] =	{ A_BOLD,	A_BOLD,		0 },
66 	[LINE_TITLE_3] =	{ A_BOLD,	A_BOLD,		0 },
67 	[LINE_ITEM] =		{ 0,		0,		0 },
68 	[LINE_QUOTE] =		{ 0,		A_DIM,		0 },
69 	[LINE_PRE_START] =	{ 0,		0,		0 },
70 	[LINE_PRE_CONTENT] =	{ 0,		0,		0 },
71 	[LINE_PRE_END] =	{ 0,		0,		0 },
72 };
73 
74 struct tab_face tab_face = {
75 	.background	= A_REVERSE,
76 	.tab		= A_REVERSE,
77 	.current_tab	= A_NORMAL,
78 };
79 
80 struct modeline_face modeline_face = {
81 	.background = A_REVERSE,
82 };
83 
84 struct minibuffer_face minibuffer_face = {
85 	.background = A_NORMAL,
86 };
87 
88 struct mapping {
89 	const char	*label;
90 	int		 linetype;
91 } mappings[] = {
92 	{"text",	LINE_TEXT},
93 	{"link",	LINE_LINK},
94 	{"title1",	LINE_TITLE_1},
95 	{"title2",	LINE_TITLE_2},
96 	{"title3",	LINE_TITLE_3},
97 	{"item",	LINE_ITEM},
98 	{"quote",	LINE_QUOTE},
99 	{"pre.start",	LINE_PRE_START},
100 	{"pre",		LINE_PRE_CONTENT},
101 	{"pre.end",	LINE_PRE_END},
102 };
103 
104 static struct mapping *
105 mapping_by_name(const char *name)
106 {
107 	size_t i;
108 
109 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
110 		if (!strcmp(name, mappings[i].label))
111 			return &mappings[i];
112 	}
113 
114 	return NULL;
115 }
116 
117 int
118 config_setprfx(const char *name, const char *prfx, const char *cont)
119 {
120 	struct lineprefix *p;
121 	struct mapping *m;
122 
123 	if (!has_prefix(name, "line."))
124 		return 0;
125 	name += 5;
126 
127 	if ((m = mapping_by_name(name)) == NULL)
128 		return 0;
129 
130 	p = &line_prefixes[m->linetype];
131 	p->prfx1 = prfx;
132 	p->prfx2 = cont;
133 
134 	return 1;
135 }
136 
137 int
138 config_setvari(const char *var, int val)
139 {
140 	if (!strcmp(var, "fill-column")) {
141 		if ((fill_column = val) <= 0)
142 			fill_column = INT_MAX;
143 	} else if (!strcmp(var, "olivetti-mode")) {
144 		olivetti_mode = !!val;
145 	} else if (!strcmp(var, "enable-colors")) {
146 		enable_colors = !!val;
147 	} else {
148 		return 0;
149 	}
150 
151 	return 1;
152 }
153 
154 int
155 config_setvars(const char *var, char *val)
156 {
157 	if (!strcmp(var, "new-tab-url")) {
158 		if (new_tab_url != NULL)
159 			free(new_tab_url);
160 		new_tab_url = val;
161 	} else
162 		return 0;
163 	return 1;
164 }
165 
166 int
167 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
168 {
169         struct mapping *m;
170 	struct lineface_descr *d;
171 
172 	if (!has_prefix(name, "line."))
173 		return 0;
174 	name += 5;
175 
176 	if ((m = mapping_by_name(name)) == NULL)
177 		return 0;
178 
179 	d = &linefaces_descr[m->linetype];
180 
181 	d->used = 1;
182 	if (bg) {
183 		d->prfx_bg = prfx;
184 		d->bg = line;
185 		d->trail_bg = trail;
186 	} else {
187 		d->prfx_fg = prfx;
188 		d->fg = line;
189 		d->trail_fg = trail;
190 	}
191 
192 	return 1;
193 }
194 
195 void
196 config_apply_colors(void)
197 {
198         size_t i, len;
199 	struct lineface_descr *d;
200 	struct line_face *f;
201 
202 	len = sizeof(linefaces_descr)/sizeof(linefaces_descr[0]);
203 	for (i = 0; i < len; ++i) {
204 		d = &linefaces_descr[i];
205 		f = &line_faces[i];
206 
207 		if (d->used) {
208 			init_pair(d->pp, d->prfx_fg, d->prfx_bg);
209 			f->prefix_prop = COLOR_PAIR(d->pp);
210 
211 			init_pair(d->p, d->fg, d->bg);
212 			f->text_prop = COLOR_PAIR(d->p);
213 
214 			init_pair(d->tp, d->trail_fg, d->trail_bg);
215 			f->trail_prop = COLOR_PAIR(d->tp);
216 		}
217 	}
218 }