blob: dd8334324b2106deabdef4678f159002a54f1438 (
plain)
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
|
// Modified from https://github.com/egoist/markdown-it-highlight-lines
const RE = /{([\d,-]+)}/
const wrapperRE = /^<pre .*?><code>/
module.exports = md => {
const fence = md.renderer.rules.fence
md.renderer.rules.fence = (...args) => {
const [tokens, idx, options] = args
const token = tokens[idx]
const rawInfo = token.info
if (!rawInfo || !RE.test(rawInfo)) {
return fence(...args)
}
const langName = rawInfo.replace(RE, '').trim()
// ensure the next plugin get the correct lang.
token.info = langName
const lineNumbers = RE.exec(rawInfo)[1]
.split(',')
.map(v => v.split('-').map(v => parseInt(v, 10)))
const code = options.highlight
? options.highlight(token.content, langName)
: token.content
const rawCode = code.replace(wrapperRE, '')
const highlightLinesCode = rawCode.split('\n').map((split, index) => {
const lineNumber = index + 1
const inRange = lineNumbers.some(([start, end]) => {
if (start && end) {
return lineNumber >= start && lineNumber <= end
}
return lineNumber === start
})
if (inRange) {
return `<div class="highlighted"> </div>`
}
return '<br>'
}).join('')
const highlightLinesWrapperCode =
`<div class="highlight-lines">${highlightLinesCode}</div>`
return highlightLinesWrapperCode + code
}
}
|
