prism-soy.js

(function (Prism) {
	var stringPattern = /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/;
	var numberPattern = /\b\d+(?:\.\d+)?(?:[eE][+-]?\d+)?\b|\b0x[\dA-F]+\b/;

	Prism.languages.soy = {
		'comment': [
			/\/\*[\s\S]*?\*\//,
			{
				pattern: /(\s)\/\/.*/,
				lookbehind: true,
				greedy: true
			}
		],
		'command-arg': {
			pattern: /({+\/?\s*(?:alias|call|delcall|delpackage|deltemplate|namespace|template)\s+)\.?[\w.]+/,
			lookbehind: true,
			alias: 'string',
			inside: {
				'punctuation': /\./
			}
		},
		'parameter': {
			pattern: /({+\/?\s*@?param\??\s+)\.?[\w.]+/,
			lookbehind: true,
			alias: 'variable'
		},
		'keyword': [
			{
				pattern: /({+\/?[^\S\r\n]*)(?:\\[nrt]|alias|call|case|css|default|delcall|delpackage|deltemplate|else(?:if)?|fallbackmsg|for(?:each)?|if(?:empty)?|lb|let|literal|msg|namespace|nil|@?param\??|rb|sp|switch|template|xid)/,
				lookbehind: true
			},
			/\b(?:any|as|attributes|bool|css|float|in|int|js|html|list|map|null|number|string|uri)\b/
		],
		'delimiter': {
			pattern: /^{+\/?|\/?}+$/,
			alias: 'punctuation'
		},
		'property': /\w+(?==)/,
		'variable': {
			pattern: /\$[^\W\d]\w*(?:\??(?:\.\w+|\[[^\]]+]))*/,
			inside: {
				'string': {
					pattern: stringPattern,
					greedy: true
				},
				'number': numberPattern,
				'punctuation': /[\[\].?]/
			}
		},
		'string': {
			pattern: stringPattern,
			greedy: true
		},
		'function': [
			/\w+(?=\()/,
			{
				pattern: /(\|[^\S\r\n]*)\w+/,
				lookbehind: true
			}
		],
		'boolean': /\b(?:true|false)\b/,
		'number': numberPattern,
		'operator': /\?:?|<=?|>=?|==?|!=|[+*/%-]|\b(?:and|not|or)\b/,
		'punctuation': /[{}()\[\]|.,:]/
	};

	// Tokenize all inline Soy expressions
	Prism.hooks.add('before-tokenize', function (env) {
		var soyPattern = /{{.+?}}|{.+?}|\s\/\/.*|\/\*[\s\S]*?\*\//g;
		var soyLitteralStart = '{literal}';
		var soyLitteralEnd = '{/literal}';
		var soyLitteralMode = false;

		Prism.languages['markup-templating'].buildPlaceholders(env, 'soy', soyPattern, function (match) {
			// Soy tags inside {literal} block are ignored
			if (match === soyLitteralEnd) {
				soyLitteralMode = false;
			}

			if (!soyLitteralMode) {
				if (match === soyLitteralStart) {
					soyLitteralMode = true;
				}

				return true;
			}
			return false;
		});
	});

	// Re-insert the tokens after tokenizing
	Prism.hooks.add('after-tokenize', function (env) {
		Prism.languages['markup-templating'].tokenizePlaceholders(env, 'soy');
	});

}(Prism));