summary refs log tree commit diff
path: root/bin/hilex/html.c
blob: bec1d6a8c198a115355b92de59ceedb71eb9a9cb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/* Copyright (C) 2020  June McEnroe <june@causal.agency>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "hilex.h"

static void htmlEscape(const char *text) {
	while (*text) {
		switch (*text) {
			break; case '"': text++; printf("&quot;");
			break; case '&': text++; printf("&amp;");
			break; case '<': text++; printf("&lt;");
		}
		size_t len = strcspn(text, "\"&<");
		if (len) fwrite(text, len, 1, stdout);
		text += len;
	}
}

static const char *Class[ClassCap] = {
#define X(class) [class] = #class,
	ENUM_CLASS
#undef X
};

static const char *Style[ClassCap] = {
	[Keyword]       = "color: dimgray;",
	[IdentifierTag] = "color: inherit;",
	[Macro]         = "color: green;",
	[Comment]       = "color: navy;",
	[String]        = "color: teal;",
	[StringFormat]  = "color: teal; font-weight: bold;",
	[Interpolation] = "color: olive;",
};

static void styleTabSize(const char *tab) {
	printf("-moz-tab-size: ");
	htmlEscape(tab);
	printf("; tab-size: ");
	htmlEscape(tab);
	printf(";");
}

static void htmlHeader(const char *opts[]) {
	if (!opts[Document]) goto body;

	printf("<!DOCTYPE html>\n<title>");
	if (opts[Title]) htmlEscape(opts[Title]);
	printf("</title>\n");

	if (opts[CSS]) {
		printf("<link rel=\"stylesheet\" href=\"");
		htmlEscape(opts[CSS]);
		printf("\">\n");
	} else if (!opts[Inline]) {
		printf("<style>\n");
		if (opts[Tab]) {
			printf("pre.hilex { ");
			styleTabSize(opts[Tab]);
			printf(" }\n");
		}
		for (enum Class class = 0; class < ClassCap; ++class) {
			if (!Style[class]) continue;
			printf(".hilex.%s { %s }\n", Class[class], Style[class]);
		}
		if (opts[Anchor]) {
			printf(
				".hilex.%s:target { color: goldenrod; outline: none; }\n",
				Class[IdentifierTag]
			);
		}
		printf("</style>\n");
	}

body:
	if (opts[Inline] && opts[Tab]) {
		printf("<pre class=\"hilex\" style=\"");
		styleTabSize(opts[Tab]);
		printf("\">");
	} else {
		printf("<pre class=\"hilex\">");
	}
}

static void htmlFooter(const char *opts[]) {
	printf("</pre>");
	if (opts[Document]) printf("\n");
}

static void htmlAnchor(const char *opts[], const char *text) {
	if (opts[Inline]) {
		printf("<a style=\"%s\" id=\"", Style[IdentifierTag]);
	} else {
		printf("<a class=\"hilex %s\" id=\"", Class[IdentifierTag]);
	}
	htmlEscape(text);
	printf("\" href=\"#");
	htmlEscape(text);
	printf("\">");
	htmlEscape(text);
	printf("</a>");
}

static void htmlFormat(const char *opts[], enum Class class, const char *text) {
	if (opts[Anchor] && class == IdentifierTag) {
		htmlAnchor(opts, text);
	} else if (class == Normal) {
		htmlEscape(text);
	} else {
		if (opts[Inline]) {
			printf("<span style=\"%s\">", Style[class] ? Style[class] : "");
		} else {
			printf("<span class=\"hilex %s\">", Class[class]);
		}
		htmlEscape(text);
		printf("</span>");
	}
}

const struct Formatter FormatHTML = { htmlHeader, htmlFormat, htmlFooter };