highlightjs-line-numbers.js
1.41 KB
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
(function (w) {
'use strict';
if (typeof w.hljs === 'undefined') {
console.error('highlight.js not detected!');
} else {
w.hljs.initLineNumbersOnLoad = initLineNumbersOnLoad;
w.hljs.lineNumbersBlock = lineNumbersBlock;
}
function initLineNumbersOnLoad () {
if (document.readyState === 'complete') {
documentReady();
} else {
w.addEventListener('DOMContentLoaded', documentReady);
}
}
function documentReady () {
try {
var blocks = document.querySelectorAll('code.hljs');
for (var i in blocks) {
if (blocks.hasOwnProperty(i)) {
lineNumbersBlock(blocks[i]);
}
}
} catch (e) {
console.error('LineNumbers error: ', e);
}
}
function lineNumbersBlock (element) {
if (typeof element !== 'object') return;
var parent = element.parentNode;
var lines = getCountLines(parent.textContent);
if (lines > 1) {
var l = '';
for (var i = 0; i < lines; i++) {
l += (i + 1) + '\n';
}
var linesPanel = document.createElement('code');
linesPanel.className = 'hljs hljs-line-numbers';
linesPanel.style.float = 'left';
linesPanel.textContent = l;
parent.insertBefore(linesPanel, element);
}
}
function getCountLines(text) {
if (text.length === 0) return 0;
var regExp = /\r\n|\r|\n/g;
var lines = text.match(regExp);
lines = lines ? lines.length : 0;
if (!text[text.length - 1].match(regExp)) {
lines += 1;
}
return lines;
}
}(window));