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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "config.h"
#include "cmark.h"
#include "node.h"
#include "buffer.h"
#include "utf8.h"
// Functions to convert cmark_nodes to groff man strings.
static void escape_man(cmark_strbuf *dest, const unsigned char *source, int length)
{
int32_t c;
int i = 0;
int len;
bool beginLine = true;
while (i < length) {
len = utf8proc_iterate(source + i, length - i, &c);
if (len == -1) { // error condition
return; // return without rendering anything
}
switch(c) {
case 46:
if (beginLine) {
cmark_strbuf_puts(dest, "\\&.");
} else {
utf8proc_encode_char(c, dest);
}
break;
case 39:
if (beginLine) {
cmark_strbuf_puts(dest, "\\&'");
} else {
utf8proc_encode_char(c, dest);
}
break;
case 45:
cmark_strbuf_puts(dest, "\\-");
break;
case 92:
cmark_strbuf_puts(dest, "\\e");
break;
case 8216: // left single quote
cmark_strbuf_puts(dest, "\\[oq]");
break;
case 8217: // right single quote
cmark_strbuf_puts(dest, "\\[cq]");
break;
case 8220: // left double quote
cmark_strbuf_puts(dest, "\\[lq]");
break;
case 8221: // right double quote
cmark_strbuf_puts(dest, "\\[rq]");
break;
case 8212: // em dash
cmark_strbuf_puts(dest, "\\[em]");
break;
case 8211: // en dash
cmark_strbuf_puts(dest, "\\[en]");
break;
default:
utf8proc_encode_char(c, dest);
}
beginLine = (c == 10);
i += len;
}
}
static inline void cr(cmark_strbuf *man)
{
if (man->size && man->ptr[man->size - 1] != '\n')
cmark_strbuf_putc(man, '\n');
}
struct render_state {
cmark_strbuf* man;
cmark_node *plain;
};
static int
S_render_node(cmark_node *node, cmark_event_type ev_type,
struct render_state *state)
{
cmark_node *tmp;
cmark_strbuf *man = state->man;
int list_number;
bool entering = (ev_type == CMARK_EVENT_ENTER);
if (state->plain == node) { // back at original node
state->plain = NULL;
}
if (state->plain != NULL) {
switch(node->type) {
case CMARK_NODE_TEXT:
case CMARK_NODE_CODE:
escape_man(man, node->as.literal.data,
node->as.literal.len);
break;
case CMARK_NODE_LINEBREAK:
case CMARK_NODE_SOFTBREAK:
cmark_strbuf_putc(man, ' ');
break;
default:
break;
}
return 1;
}
switch (node->type) {
case CMARK_NODE_DOCUMENT:
break;
case CMARK_NODE_BLOCK_QUOTE:
if (entering) {
cr(man);
cmark_strbuf_puts(man, ".RS");
cr(man);
} else {
cr(man);
cmark_strbuf_puts(man, ".RE");
cr(man);
}
break;
case CMARK_NODE_LIST:
break;
case CMARK_NODE_ITEM:
if (entering) {
cr(man);
cmark_strbuf_puts(man, ".IP ");
if (cmark_node_get_list_type(node->parent) ==
CMARK_BULLET_LIST) {
cmark_strbuf_puts(man, "\\[bu] 2");
} else {
list_number = cmark_node_get_list_start(node->parent);
tmp = node;
while (tmp->prev) {
tmp = tmp->prev;
list_number += 1;
}
cmark_strbuf_printf(man, "\"%d.\" 4", list_number);
}
cr(man);
} else {
cr(man);
}
break;
case CMARK_NODE_HEADER:
if (entering) {
cr(man);
cmark_strbuf_puts(man,
cmark_node_get_header_level(node) == 1 ?
".SH" : ".SS");
cr(man);
} else {
cr(man);
}
break;
case CMARK_NODE_CODE_BLOCK:
cr(man);
cmark_strbuf_puts(man, ".IP\n.nf\n\\f[C]\n");
escape_man(man, node->as.code.literal.data,
node->as.code.literal.len);
cr(man);
cmark_strbuf_puts(man, "\\f[]\n.fi");
cr(man);
break;
case CMARK_NODE_HTML:
break;
case CMARK_NODE_HRULE:
cr(man);
cmark_strbuf_puts(man, ".PP\n * * * * *");
cr(man);
break;
case CMARK_NODE_PARAGRAPH:
if (entering) {
// no blank line if first paragraph in list:
if (node->parent &&
node->parent->type == CMARK_NODE_ITEM &&
node->prev == NULL) {
// no blank line or .PP
} else {
cr(man);
cmark_strbuf_puts(man, ".PP\n");
}
} else {
cr(man);
}
break;
case CMARK_NODE_TEXT:
escape_man(man, node->as.literal.data,
node->as.literal.len);
break;
case CMARK_NODE_LINEBREAK:
cmark_strbuf_puts(man, ".PD 0\n.P\n.PD");
cr(man);
break;
case CMARK_NODE_SOFTBREAK:
cmark_strbuf_putc(man, '\n');
break;
case CMARK_NODE_CODE:
cmark_strbuf_puts(man, "\\f[C]");
escape_man(man, node->as.literal.data, node->as.literal.len);
cmark_strbuf_puts(man, "\\f[]");
break;
case CMARK_NODE_INLINE_HTML:
break;
case CMARK_NODE_STRONG:
if (entering) {
cmark_strbuf_puts(man, "\\f[B]");
} else {
cmark_strbuf_puts(man, "\\f[]");
}
break;
case CMARK_NODE_EMPH:
if (entering) {
cmark_strbuf_puts(man, "\\f[I]");
} else {
cmark_strbuf_puts(man, "\\f[]");
}
break;
case CMARK_NODE_LINK:
if (!entering) {
cmark_strbuf_printf(man, " (%s)",
cmark_node_get_url(node));
}
break;
case CMARK_NODE_IMAGE:
if (entering) {
cmark_strbuf_puts(man, "[IMAGE: ");
state->plain = node;
} else {
cmark_strbuf_puts(man, "]");
}
break;
default:
assert(false);
break;
}
// cmark_strbuf_putc(man, 'x');
return 1;
}
char *cmark_render_man(cmark_node *root, int options)
{
char *result;
cmark_strbuf man = GH_BUF_INIT;
struct render_state state = { &man, NULL };
cmark_node *cur;
cmark_event_type ev_type;
cmark_iter *iter = cmark_iter_new(root);
if (options == 0) options = 0; // avoid warning about unused parameters
while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
cur = cmark_iter_get_node(iter);
S_render_node(cur, ev_type, &state);
}
result = (char *)cmark_strbuf_detach(&man);
cmark_iter_free(iter);
return result;
}
|
