prism-handlebars.js
2.25 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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
(function(Prism) {
var handlebars_pattern = /\{\{\{[\w\W]+?\}\}\}|\{\{[\w\W]+?\}\}/g;
Prism.languages.handlebars = Prism.languages.extend('markup', {
'handlebars': {
pattern: handlebars_pattern,
inside: {
'delimiter': {
pattern: /^\{\{\{?|\}\}\}?$/i,
alias: 'punctuation'
},
'string': /(["'])(\\?.)*?\1/,
'number': /\b-?(0x[\dA-Fa-f]+|\d*\.?\d+([Ee][+-]?\d+)?)\b/,
'boolean': /\b(true|false)\b/,
'block': {
pattern: /^(\s*~?\s*)[#\/]\S+?(?=\s*~?\s*$|\s)/i,
lookbehind: true,
alias: 'keyword'
},
'brackets': {
pattern: /\[[^\]]+\]/,
inside: {
punctuation: /\[|\]/,
variable: /[\w\W]+/
}
},
'punctuation': /[!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~]/,
'variable': /[^!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~\s]+/
}
}
});
// Comments are inserted at top so that they can
// surround markup
Prism.languages.insertBefore('handlebars', 'tag', {
'handlebars-comment': {
pattern: /\{\{![\w\W]*?\}\}/,
alias: ['handlebars','comment']
}
});
// Tokenize all inline Handlebars expressions that are wrapped in {{ }} or {{{ }}}
// This allows for easy Handlebars + markup highlighting
Prism.hooks.add('before-highlight', function(env) {
if (env.language !== 'handlebars') {
return;
}
env.tokenStack = [];
env.backupCode = env.code;
env.code = env.code.replace(handlebars_pattern, function(match) {
env.tokenStack.push(match);
return '___HANDLEBARS' + env.tokenStack.length + '___';
});
});
// Restore env.code for other plugins (e.g. line-numbers)
Prism.hooks.add('before-insert', function(env) {
if (env.language === 'handlebars') {
env.code = env.backupCode;
delete env.backupCode;
}
});
// Re-insert the tokens after highlighting
// and highlight them with defined grammar
Prism.hooks.add('after-highlight', function(env) {
if (env.language !== 'handlebars') {
return;
}
for (var i = 0, t; t = env.tokenStack[i]; i++) {
// The replace prevents $$, $&, $`, $', $n, $nn from being interpreted as special patterns
env.highlightedCode = env.highlightedCode.replace('___HANDLEBARS' + (i + 1) + '___', Prism.highlight(t, env.grammar, 'handlebars').replace(/\$/g, '$$$$'));
}
env.element.innerHTML = env.highlightedCode;
});
}(Prism));