prism-coffeescript.js

(function (Prism) {

	// Ignore comments starting with { to privilege string interpolation highlighting
	var comment = /#(?!\{).+/;
	var interpolation = {
		pattern: /#\{[^}]+\}/,
		alias: 'variable'
	};

	Prism.languages.coffeescript = Prism.languages.extend('javascript', {
		'comment': comment,
		'string': [

			// Strings are multiline
			{
				pattern: /'(?:\\[\s\S]|[^\\'])*'/,
				greedy: true
			},

			{
				// Strings are multiline
				pattern: /"(?:\\[\s\S]|[^\\"])*"/,
				greedy: true,
				inside: {
					'interpolation': interpolation
				}
			}
		],
		'keyword': /\b(?:and|break|by|catch|class|continue|debugger|delete|do|each|else|extend|extends|false|finally|for|if|in|instanceof|is|isnt|let|loop|namespace|new|no|not|null|of|off|on|or|own|return|super|switch|then|this|throw|true|try|typeof|undefined|unless|until|when|while|window|with|yes|yield)\b/,
		'class-member': {
			pattern: /@(?!\d)\w+/,
			alias: 'variable'
		}
	});

	Prism.languages.insertBefore('coffeescript', 'comment', {
		'multiline-comment': {
			pattern: /###[\s\S]+?###/,
			alias: 'comment'
		},

		// Block regexp can contain comments and interpolation
		'block-regex': {
			pattern: /\/{3}[\s\S]*?\/{3}/,
			alias: 'regex',
			inside: {
				'comment': comment,
				'interpolation': interpolation
			}
		}
	});

	Prism.languages.insertBefore('coffeescript', 'string', {
		'inline-javascript': {
			pattern: /`(?:\\[\s\S]|[^\\`])*`/,
			inside: {
				'delimiter': {
					pattern: /^`|`$/,
					alias: 'punctuation'
				},
				'script': {
					pattern: /[\s\S]+/,
					alias: 'language-javascript',
					inside: Prism.languages.javascript
				}
			}
		},

		// Block strings
		'multiline-string': [
			{
				pattern: /'''[\s\S]*?'''/,
				greedy: true,
				alias: 'string'
			},
			{
				pattern: /"""[\s\S]*?"""/,
				greedy: true,
				alias: 'string',
				inside: {
					interpolation: interpolation
				}
			}
		]

	});

	Prism.languages.insertBefore('coffeescript', 'keyword', {
		// Object property
		'property': /(?!\d)\w+(?=\s*:(?!:))/
	});

	delete Prism.languages.coffeescript['template-string'];

	Prism.languages.coffee = Prism.languages.coffeescript;
}(Prism));