-
-
Notifications
You must be signed in to change notification settings - Fork 10
/
renderer.js
171 lines (146 loc) · 3.73 KB
/
renderer.js
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
import slugo from 'slugo'
import { escape, unescape } from './utils'
const highlightLinesRe = /{([\d,-]+)}/
export default class Renderer {
constructor(options) {
this.options = options || {}
this._headings = []
}
code(code, lang, escaped) {
let dataLine = ''
if (this.options.dataLine && lang && highlightLinesRe.test(lang)) {
dataLine = ` data-line="${highlightLinesRe.exec(lang)[1]}"`
lang = lang.substr(0, lang.indexOf('{'))
}
if (this.options.highlight) {
const out = this.options.highlight(code, lang)
if (out !== null && out !== code) {
escaped = true
code = out
}
}
if (!lang) {
return `<pre${dataLine}><code>${escaped
? code
: escape(code, true)}\n</code></pre>`
}
return `<pre${dataLine}><code class="${this.options.langPrefix}${escape(
lang,
true
)}">${escaped ? code : escape(code, true)}\n</code></pre>\n`
}
blockquote(quote) {
return `<blockquote>\n${quote}</blockquote>\n`
}
html(html) {
return html
}
heading(text, level, raw) {
let slug = slugo(raw)
const count = this._headings.filter(h => h === raw).length
if (count > 0) {
slug += `-${count}`
}
this._headings.push(raw)
return `<h${level} id="${this.options
.headerPrefix}${slug}">${text}</h${level}>\n`
}
hr() {
return this.options.xhtml ? '<hr/>\n' : '<hr>\n'
}
list(body, ordered, taskList) {
const type = ordered ? 'ol' : 'ul'
const classNames = taskList ? ' class="task-list"' : ''
return `<${type}${classNames}>\n${body}</${type}>\n`
}
listitem(text, checked) {
if (checked === undefined) {
return `<li>${text}</li>\n`
}
return (
'<li class="task-list-item">' +
'<input type="checkbox" class="task-list-item-checkbox"' +
(checked ? ' checked' : '') +
'> ' +
text +
'</li>\n'
)
}
paragraph(text) {
return `<p>${text}</p>\n`
}
table(header, body) {
return `<table>\n<thead>\n${header}</thead>\n<tbody>\n${body}</tbody>\n</table>\n`
}
tablerow(content) {
return `<tr>\n${content}</tr>\n`
}
tablecell(content, flags) {
const type = flags.header ? 'th' : 'td'
const tag = flags.align
? `<${type} style="text-align:${flags.align}">`
: `<${type}>`
return `${tag + content}</${type}>\n`
}
// span level renderer
strong(text) {
return `<strong>${text}</strong>`
}
em(text) {
return `<em>${text}</em>`
}
codespan(text) {
return `<code>${text}</code>`
}
br() {
return this.options.xhtml ? '<br/>' : '<br>'
}
del(text) {
return `<del>${text}</del>`
}
link(href, title, text) {
if (this.options.sanitize) {
let prot
try {
prot = decodeURIComponent(unescape(href))
.replace(/[^\w:]/g, '')
.toLowerCase()
} catch (err) {
return ''
}
if (
// eslint-disable-next-line no-script-url
prot.indexOf('javascript:') === 0 ||
prot.indexOf('vbscript:') === 0 ||
prot.indexOf('data:') === 0
) {
// eslint-disable-line no-script-url
return ''
}
}
let out = `<a href="${href}"`
if (title) {
out += ` title="${title}"`
}
const { linksInNewTab } = this.options
const targetBlank =
linksInNewTab === true ||
(typeof linksInNewTab === 'function' && linksInNewTab(href))
if (targetBlank) {
out += ` target="_blank"`
}
out += `>${text}</a>`
return out
}
image(href, title, text) {
let out = `<img src="${href}" alt="${text}"`
if (title) {
out += ` title="${title}"`
}
out += this.options.xhtml ? '/>' : '>'
return out
}
text(text) {
return text
}
}