forked from miekg/mmark
-
Notifications
You must be signed in to change notification settings - Fork 0
/
quote.go
252 lines (223 loc) · 4.9 KB
/
quote.go
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
// Functions to parse quote-like elements.
package mmark
import "bytes"
// TODO(miek): this can be refactered
// returns notequote prefix length
func (p *parser) notePrefix(data []byte) int {
i := 0
for i < 3 && data[i] == ' ' {
i++
}
if data[i] == 'N' && data[i+1] == '>' {
if data[i+2] == ' ' {
return i + 3
}
return i + 2
}
return 0
}
// parse an note fragment
func (p *parser) note(out *bytes.Buffer, data []byte) int {
var raw bytes.Buffer
beg, end := 0, 0
for beg < len(data) {
end = beg
for data[end] != '\n' {
end++
}
end++
if pre := p.notePrefix(data[beg:]); pre > 0 {
// skip the prefix
beg += pre
} else if p.isEmpty(data[beg:]) > 0 &&
(end >= len(data) ||
(p.notePrefix(data[end:]) == 0 && p.isEmpty(data[end:]) == 0)) {
break
}
raw.Write(data[beg:end])
beg = end
}
var cooked bytes.Buffer
p.block(&cooked, raw.Bytes())
p.r.SetInlineAttr(p.ial)
p.ial = nil
p.r.Note(out, cooked.Bytes())
return end
}
// returns asidequote prefix length
func (p *parser) asidePrefix(data []byte) int {
i := 0
for i < 3 && data[i] == ' ' {
i++
}
if data[i] == 'A' && data[i+1] == '>' {
if data[i+2] == ' ' {
return i + 3
}
return i + 2
}
return 0
}
// parse an aside fragment
func (p *parser) aside(out *bytes.Buffer, data []byte) int {
var raw bytes.Buffer
beg, end := 0, 0
for beg < len(data) {
end = beg
for data[end] != '\n' {
end++
}
end++
if pre := p.asidePrefix(data[beg:]); pre > 0 {
// skip the prefix
beg += pre
} else if p.isEmpty(data[beg:]) > 0 &&
(end >= len(data) ||
(p.asidePrefix(data[end:]) == 0 && p.isEmpty(data[end:]) == 0)) {
break
}
raw.Write(data[beg:end])
beg = end
}
var cooked bytes.Buffer
p.block(&cooked, raw.Bytes())
p.r.SetInlineAttr(p.ial)
p.ial = nil
p.r.Aside(out, cooked.Bytes())
return end
}
// returns blockquote prefix length
func (p *parser) quotePrefix(data []byte) int {
i := 0
for i < 3 && data[i] == ' ' {
i++
}
if data[i] == '>' {
if data[i+1] == ' ' {
return i + 2
}
return i + 1
}
return 0
}
// parse a blockquote fragment
func (p *parser) quote(out *bytes.Buffer, data []byte) int {
var raw bytes.Buffer
beg, end := 0, 0
for beg < len(data) {
end = beg
for data[end] != '\n' {
end++
}
end++
if pre := p.quotePrefix(data[beg:]); pre > 0 {
// skip the prefix
beg += pre
} else if bytes.HasPrefix(data[beg:], []byte("Quote: ")) {
break
} else if p.isEmpty(data[beg:]) > 0 &&
(end >= len(data) ||
(p.quotePrefix(data[end:]) == 0 && p.isEmpty(data[end:]) == 0)) {
// blockquote ends with at least one blank line
// followed by something without a blockquote prefix
break
}
// this line is part of the blockquote
raw.Write(data[beg:end])
beg = end
}
var attribution bytes.Buffer
line := beg
j := beg
if bytes.HasPrefix(data[j:], []byte("Quote: ")) {
for line < len(data) {
j++
// find the end of this line
for data[j-1] != '\n' {
j++
}
if p.isEmpty(data[line:j]) > 0 {
break
}
line = j
}
p.inline(&attribution, data[beg+7:j-1]) // +7 for 'Quote: '
}
ials := p.ial
p.ial = nil
// This set a new level of attributes, we could possible override what
// we have gotten above. TODO(miek): this might need to happen in more
// places.
var cooked bytes.Buffer
p.block(&cooked, raw.Bytes())
p.r.SetInlineAttr(ials)
p.r.BlockQuote(out, cooked.Bytes(), attribution.Bytes())
return j
}
// returns figurequote prefix length
func (p *parser) figurePrefix(data []byte) int {
i := 0
for i < 3 && data[i] == ' ' {
i++
}
if data[i] == 'F' && data[i+1] == '>' {
if data[i+2] == ' ' {
return i + 3
}
return i + 2
}
return 0
}
// parse a figurequote fragment
func (p *parser) figure(out *bytes.Buffer, data []byte) int {
var raw bytes.Buffer
beg, end := 0, 0
for beg < len(data) {
end = beg
for data[end] != '\n' {
end++
}
end++
if pre := p.figurePrefix(data[beg:]); pre > 0 {
// skip the prefix
beg += pre
} else if bytes.HasPrefix(data[beg:], []byte("Figure: ")) {
break
} else if p.isEmpty(data[beg:]) > 0 &&
(end >= len(data) ||
(p.figurePrefix(data[end:]) == 0 && p.isEmpty(data[end:]) == 0)) {
// figurequote ends with at least one blank line
// followed by something without a figurequote prefix
break
}
// this line is part of the figurequote
raw.Write(data[beg:end])
beg = end
}
var caption bytes.Buffer
line := beg
j := beg
// this one must start on j
if bytes.HasPrefix(data[j:], []byte("Figure: ")) {
for line < len(data) {
j++
// find the end of this line
for data[j-1] != '\n' {
j++
}
if p.isEmpty(data[line:j]) > 0 {
break
}
line = j
}
p.inline(&caption, data[beg+8:j-1]) // +8 for 'Figure: '
}
p.insideFigure = true
var cooked bytes.Buffer
p.block(&cooked, raw.Bytes())
p.insideFigure = false
p.r.SetInlineAttr(p.ial)
p.ial = nil
p.r.Figure(out, cooked.Bytes(), caption.Bytes())
return j
}