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
|
// Process [link](<to> "stuff")
'use strict';
var normalizeReference = require('../common/utils').normalizeReference;
var isSpace = require('../common/utils').isSpace;
module.exports = function link(state, silent) {
var attrs,
code,
label,
labelEnd,
labelStart,
pos,
res,
ref,
token,
href = '',
title = '',
oldPos = state.pos,
max = state.posMax,
start = state.pos,
parseReference = true;
if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }
labelStart = state.pos + 1;
labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, true);
// parser failed to find ']', so it's not a valid link
if (labelEnd < 0) { return false; }
pos = labelEnd + 1;
if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
//
// Inline link
//
// might have found a valid shortcut link, disable reference parsing
parseReference = false;
// [link]( <href> "title" )
// ^^ skipping these spaces
pos++;
for (; pos < max; pos++) {
code = state.src.charCodeAt(pos);
if (!isSpace(code) && code !== 0x0A) { break; }
}
if (pos >= max) { return false; }
// [link]( <href> "title" )
// ^^^^^^ parsing link destination
start = pos;
res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax);
if (res.ok) {
href = state.md.normalizeLink(res.str);
if (state.md.validateLink(href)) {
pos = res.pos;
} else {
href = '';
}
// [link]( <href> "title" )
// ^^ skipping these spaces
start = pos;
for (; pos < max; pos++) {
code = state.src.charCodeAt(pos);
if (!isSpace(code) && code !== 0x0A) { break; }
}
// [link]( <href> "title" )
// ^^^^^^^ parsing link title
res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax);
if (pos < max && start !== pos && res.ok) {
title = res.str;
pos = res.pos;
// [link]( <href> "title" )
// ^^ skipping these spaces
for (; pos < max; pos++) {
code = state.src.charCodeAt(pos);
if (!isSpace(code) && code !== 0x0A) { break; }
}
}
}
if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
// parsing a valid shortcut link failed, fallback to reference
parseReference = true;
}
pos++;
}
if (parseReference) {
//
// Link reference
//
if (typeof state.env.references === 'undefined') { return false; }
if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
start = pos + 1;
pos = state.md.helpers.parseLinkLabel(state, pos);
if (pos >= 0) {
label = state.src.slice(start, pos++);
} else {
pos = labelEnd + 1;
}
} else {
pos = labelEnd + 1;
}
// covers label === '' and label === undefined
// (collapsed reference link and shortcut reference link respectively)
if (!label) { label = state.src.slice(labelStart, labelEnd); }
ref = state.env.references[normalizeReference(label)];
if (!ref) {
state.pos = oldPos;
return false;
}
href = ref.href;
title = ref.title;
}
//
// We found the end of the link, and know for a fact it's a valid link;
// so all that's left to do is to call tokenizer.
//
if (!silent) {
state.pos = labelStart;
state.posMax = labelEnd;
token = state.push('link_open', 'a', 1);
token.attrs = attrs = [ [ 'href', href ] ];
if (title) {
attrs.push([ 'title', title ]);
}
state.md.inline.tokenize(state);
token = state.push('link_close', 'a', -1);
}
state.pos = pos;
state.posMax = max;
return true;
};
|
