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 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,		0 },
62 	[LINE_LINK] =		{ 0,		A_UNDERLINE,	0 },
63 	[LINE_TITLE_1] =	{ A_BOLD,	A_BOLD,		0 },
64 	[LINE_TITLE_2] =	{ A_BOLD,	A_BOLD,		0 },
65 	[LINE_TITLE_3] =	{ A_BOLD,	A_BOLD,		0 },
66 	[LINE_ITEM] =		{ 0,		0,		0 },
67 	[LINE_QUOTE] =		{ 0,		A_DIM,		0 },
68 	[LINE_PRE_START] =	{ 0,		0,		0 },
69 	[LINE_PRE_CONTENT] =	{ 0,		0,		0 },
70 	[LINE_PRE_END] =	{ 0,		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 body_face body_face = {
80 	.lbg = -1, .lfg = -1,
81 	.bg  = -1, .fg  = -1,
82 	.rbg = -1, .rfg = -1,
83 };
84 
85 struct modeline_face modeline_face = {
86 	.background = A_REVERSE,
87 };
88 
89 struct minibuffer_face minibuffer_face = {
90 	.background = A_NORMAL,
91 };
92 
93 struct mapping {
94 	const char	*label;
95 	int		 linetype;
96 } mappings[] = {
97 	{"text",	LINE_TEXT},
98 	{"link",	LINE_LINK},
99 	{"title1",	LINE_TITLE_1},
100 	{"title2",	LINE_TITLE_2},
101 	{"title3",	LINE_TITLE_3},
102 	{"item",	LINE_ITEM},
103 	{"quote",	LINE_QUOTE},
104 	{"pre.start",	LINE_PRE_START},
105 	{"pre",		LINE_PRE_CONTENT},
106 	{"pre.end",	LINE_PRE_END},
107 };
108 
109 static struct mapping *
110 mapping_by_name(const char *name)
111 {
112 	size_t i;
113 
114 	for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
115 		if (!strcmp(name, mappings[i].label))
116 			return &mappings[i];
117 	}
118 
119 	return NULL;
120 }
121 
122 int
123 config_setprfx(const char *name, const char *prfx, const char *cont)
124 {
125 	struct lineprefix *p;
126 	struct mapping *m;
127 
128 	if (!has_prefix(name, "line."))
129 		return 0;
130 	name += 5;
131 
132 	if ((m = mapping_by_name(name)) == NULL)
133 		return 0;
134 
135 	p = &line_prefixes[m->linetype];
136 	p->prfx1 = prfx;
137 	p->prfx2 = cont;
138 
139 	return 1;
140 }
141 
142 int
143 config_setvari(const char *var, int val)
144 {
145 	if (!strcmp(var, "fill-column")) {
146 		if ((fill_column = val) <= 0)
147 			fill_column = INT_MAX;
148 	} else if (!strcmp(var, "olivetti-mode")) {
149 		olivetti_mode = !!val;
150 	} else if (!strcmp(var, "enable-colors")) {
151 		enable_colors = !!val;
152 	} else {
153 		return 0;
154 	}
155 
156 	return 1;
157 }
158 
159 int
160 config_setvars(const char *var, char *val)
161 {
162 	if (!strcmp(var, "new-tab-url")) {
163 		if (new_tab_url != NULL)
164 			free(new_tab_url);
165 		new_tab_url = val;
166 	} else
167 		return 0;
168 	return 1;
169 }
170 
171 int
172 config_setcolor(int bg, const char *name, int prfx, int line, int trail)
173 {
174         struct mapping *m;
175 	struct lineface_descr *d;
176 
177 	if (has_prefix(name, "line.")) {
178 		name += 5;
179 
180 		if ((m = mapping_by_name(name)) == NULL)
181 			return 0;
182 
183 		d = &linefaces_descr[m->linetype];
184 
185 		d->used = 1;
186 		if (bg) {
187 			d->prfx_bg = prfx;
188 			d->bg = line;
189 			d->trail_bg = trail;
190 		} else {
191 			d->prfx_fg = prfx;
192 			d->fg = line;
193 			d->trail_fg = trail;
194 		}
195 	} else if (!strcmp(name, "line")) {
196 		if (bg) {
197 			body_face.lbg = prfx;
198 			body_face.bg  = line;
199 			body_face.rbg = trail;
200 		} else {
201 			body_face.fg = prfx;
202 			body_face.fg = line;
203 			body_face.fg = trail;
204 		}
205 	} else {
206 		return 0;
207 	}
208 
209 	return 1;
210 }
211 
212 void
213 config_apply_colors(void)
214 {
215         size_t i, len;
216 	struct lineface_descr *d;
217 	struct line_face *f;
218 
219 	len = sizeof(linefaces_descr)/sizeof(linefaces_descr[0]);
220 	for (i = 0; i < len; ++i) {
221 		d = &linefaces_descr[i];
222 		f = &line_faces[i];
223 
224 		if (d->used) {
225 			init_pair(d->pp, d->prfx_fg, d->prfx_bg);
226 			f->prefix_prop = COLOR_PAIR(d->pp);
227 
228 			init_pair(d->p, d->fg, d->bg);
229 			f->text_prop = COLOR_PAIR(d->p);
230 
231 			init_pair(d->tp, d->trail_fg, d->trail_bg);
232 			f->trail_prop = COLOR_PAIR(d->tp);
233 		}
234 	}
235 
236 	init_pair(PBODY, body_face.fg, body_face.bg);
237 	body_face.body = COLOR_PAIR(PBODY);
238 
239 	init_pair(PBLEFT, body_face.lfg, body_face.lbg);
240 	body_face.left = COLOR_PAIR(PBLEFT);
241 
242 	init_pair(PBRIGHT, body_face.rfg, body_face.rbg);
243 	body_face.right = COLOR_PAIR(PBRIGHT);
244 }