blob: 5d397bb2ef7cb988a0a463a1a10cd47d3aea9905 (
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
50
51
52
53
54
55
56
57
58
|
var is = require('is');
var Immutable = require('immutable');
var Promise = require('../../utils/promise');
var editHTMLElement = require('./editHTMLElement');
/**
Return language for a code blocks from a list of class names
@param {Array<String>}
@return {String}
*/
function getLanguageForClass(classNames) {
return Immutable.List(classNames)
.map(function(cl) {
// Markdown
if (cl.search('lang-') === 0) {
return cl.slice('lang-'.length);
}
// Asciidoc
if (cl.search('language-') === 0) {
return cl.slice('language-'.length);
}
return null;
})
.find(function(cl) {
return Boolean(cl);
});
}
/**
Highlight all code elements
@param {Function(lang, body) -> String} highlight
@param {HTMLDom} $
@return {Promise}
*/
function highlightCode(highlight, $) {
return editHTMLElement($, 'code', function($code) {
var classNames = ($code.attr('class') || '').split(' ');
var lang = getLanguageForClass(classNames);
var source = $code.text();
return Promise(highlight(lang, source))
.then(function(r) {
if (is.string(r.html)) {
$code.html(r.html);
} else {
$code.text(r.text);
}
});
});
}
module.exports = highlightCode;
|
