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83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
10 years ago
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(function(Prism) {
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var handlebars_pattern = /\{\{\{[\w\W]+?\}\}\}|\{\{[\w\W]+?\}\}/g;
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Prism.languages.handlebars = Prism.languages.extend('markup', {
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'handlebars': {
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pattern: handlebars_pattern,
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inside: {
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'delimiter': {
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pattern: /^\{\{\{?|\}\}\}?$/ig,
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alias: 'punctuation'
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},
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'string': /(["'])(\\?.)+?\1/g,
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'number': /\b-?(0x[\dA-Fa-f]+|\d*\.?\d+([Ee]-?\d+)?)\b/g,
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'boolean': /\b(true|false)\b/g,
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'block': {
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pattern: /^(\s*~?\s*)[#\/]\w+/ig,
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lookbehind: true,
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alias: 'keyword'
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},
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'brackets': {
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pattern: /\[[^\]]+\]/,
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inside: {
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punctuation: /\[|\]/g,
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variable: /[\w\W]+/g
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}
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},
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'punctuation': /[!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~]/g,
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'variable': /[^!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~]+/g
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}
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}
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});
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// Comments are inserted at top so that they can
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// surround markup
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Prism.languages.insertBefore('handlebars', 'tag', {
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'handlebars-comment': {
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pattern: /\{\{![\w\W]*?\}\}/g,
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alias: ['handlebars','comment']
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}
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});
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// Tokenize all inline Handlebars expressions that are wrapped in {{ }} or {{{ }}}
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// This allows for easy Handlebars + markup highlighting
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Prism.hooks.add('before-highlight', function(env) {
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if (env.language !== 'handlebars') {
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return;
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}
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env.tokenStack = [];
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env.backupCode = env.code;
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env.code = env.code.replace(handlebars_pattern, function(match) {
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env.tokenStack.push(match);
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return '___HANDLEBARS' + env.tokenStack.length + '___';
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});
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});
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// Restore env.code for other plugins (e.g. line-numbers)
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Prism.hooks.add('before-insert', function(env) {
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if (env.language === 'handlebars') {
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env.code = env.backupCode;
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delete env.backupCode;
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}
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});
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// Re-insert the tokens after highlighting
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// and highlight them with defined grammar
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Prism.hooks.add('after-highlight', function(env) {
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if (env.language !== 'handlebars') {
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return;
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}
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for (var i = 0, t; t = env.tokenStack[i]; i++) {
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env.highlightedCode = env.highlightedCode.replace('___HANDLEBARS' + (i + 1) + '___', Prism.highlight(t, env.grammar, 'handlebars'));
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}
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env.element.innerHTML = env.highlightedCode;
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});
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}(Prism));
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