93 lines
2.5 KiB
JavaScript
93 lines
2.5 KiB
JavaScript
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(function(Prism) {
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var handlebars_pattern = /\{\{\{[\s\S]+?\}\}\}|\{\{[\s\S]+?\}\}/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: /^\{\{\{?|\}\}\}?$/i,
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alias: 'punctuation'
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},
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'string': /(["'])(\\?.)*?\1/,
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'number': /\b-?(0x[\dA-Fa-f]+|\d*\.?\d+([Ee][+-]?\d+)?)\b/,
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'boolean': /\b(true|false)\b/,
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'block': {
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pattern: /^(\s*~?\s*)[#\/]\S+?(?=\s*~?\s*$|\s)/i,
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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: /\[|\]/,
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variable: /[\s\S]+/
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}
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},
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'punctuation': /[!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~]/,
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'variable': /[^!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~\s]+/
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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: /\{\{![\s\S]*?\}\}/,
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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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var i = env.tokenStack.length;
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// Check for existing strings
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while (env.backupCode.indexOf('___HANDLEBARS' + i + '___') !== -1)
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++i;
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// Create a sparse array
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env.tokenStack[i] = match;
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return '___HANDLEBARS' + i + '___';
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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, keys = Object.keys(env.tokenStack); i < keys.length; ++i) {
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var k = keys[i];
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var t = env.tokenStack[k];
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// The replace prevents $$, $&, $`, $', $n, $nn from being interpreted as special patterns
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env.highlightedCode = env.highlightedCode.replace('___HANDLEBARS' + k + '___', Prism.highlight(t, env.grammar, 'handlebars').replace(/\$/g, '$$$$'));
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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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