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
|
// Copyright 2015 The Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package markdown
func ruleLink(s *StateInline, silent bool) bool {
pos := s.Pos
oldPos := s.Pos
max := s.PosMax
start := s.Pos
parseReference := true
src := s.Src
if src[pos] != '[' {
return false
}
labelStart := pos + 1
labelEnd := parseLinkLabel(s, pos, true)
if labelEnd < 0 {
return false
}
pos = labelEnd + 1
var title, href, label string
if pos < max && src[pos] == '(' {
parseReference = false
pos++
for pos < max {
code := src[pos]
if !byteIsSpace(code) && code != '\n' {
break
}
pos++
}
if pos >= max {
return false
}
start = pos
url, _, endpos, ok := parseLinkDestination(src, pos, s.PosMax)
if ok {
url = normalizeLink(url)
if validateLink(url) {
pos = endpos
href = url
}
}
start = pos
for pos < max {
code := src[pos]
if !byteIsSpace(code) && code != '\n' {
break
}
pos++
}
title, _, endpos, ok = parseLinkTitle(src, pos, s.PosMax)
if pos < max && start != pos && ok {
pos = endpos
for pos < max {
code := src[pos]
if !byteIsSpace(code) && code != '\n' {
break
}
pos++
}
}
if pos >= max || src[pos] != ')' {
parseReference = true
}
pos++
}
if parseReference {
if s.Env.References == nil {
return false
}
if pos < max && src[pos] == '[' {
start := pos + 1
pos = parseLinkLabel(s, pos, false)
if pos >= 0 {
label = src[start:pos]
pos++
} else {
pos = labelEnd + 1
}
} else {
pos = labelEnd + 1
}
if label == "" {
label = src[labelStart:labelEnd]
}
ref, ok := s.Env.References[normalizeReference(label)]
if !ok {
s.Pos = oldPos
return false
}
href = ref["href"]
title = ref["title"]
}
if !silent {
s.Pos = labelStart
s.PosMax = labelEnd
s.PushOpeningToken(&LinkOpen{
Href: href,
Title: title,
})
s.Md.Inline.Tokenize(s)
s.PushClosingToken(&LinkClose{})
}
s.Pos = pos
s.PosMax = max
return true
}
|
