Add lua syntax highlighting

assets/javascripts/vendor/prism.js

@@ -1,4 +1,4 @@
-/* http://prismjs.com/download.html?themes=prism&languages=markup+css+clike+javascript+c+cpp+coffeescript+ruby+elixir+go+php+python+rust */
+/* http://prismjs.com/download.html?themes=prism&languages=markup+css+clike+javascript+c+cpp+coffeescript+ruby+elixir+go+lua+php+python+rust */
 var _self = (typeof window !== 'undefined')
 	? window   // if in browser
 	: (
@@ -155,10 +155,17 @@ var _ = _self.Prism = {
 	plugins: {},
 
 	highlightAll: function(async, callback) {
-		var elements = document.querySelectorAll('code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code');
+		var env = {
+			callback: callback,
+			selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
+		};
+
+		_.hooks.run("before-highlightall", env);
+
+		var elements = env.elements || document.querySelectorAll(env.selector);
 
 		for (var i=0, element; element = elements[i++];) {
-			_.highlightElement(element, async === true, callback);
+			_.highlightElement(element, async === true, env.callback);
 		}
 	},
 
@@ -268,6 +275,7 @@ var _ = _self.Prism = {
 				var pattern = patterns[j],
 					inside = pattern.inside,
 					lookbehind = !!pattern.lookbehind,
+					greedy = !!pattern.greedy,
 					lookbehindLength = 0,
 					alias = pattern.alias;
 
@@ -288,36 +296,73 @@ var _ = _self.Prism = {
 
 					pattern.lastIndex = 0;
 
-					var match = pattern.exec(str);
+					var match = pattern.exec(str),
+					    delNum = 1;
+
+					// Greedy patterns can override/remove up to two previously matched tokens
+					if (!match && greedy && i != strarr.length - 1) {
+						// Reconstruct the original text using the next two tokens
+						var nextToken = strarr[i + 1].matchedStr || strarr[i + 1],
+						    combStr = str + nextToken;
+
+						if (i < strarr.length - 2) {
+							combStr += strarr[i + 2].matchedStr || strarr[i + 2];
+						}
 
-					if (match) {
-						if(lookbehind) {
-							lookbehindLength = match[1].length;
+						// Try the pattern again on the reconstructed text
+						pattern.lastIndex = 0;
+						match = pattern.exec(combStr);
+						if (!match) {
+							continue;
 						}
 
-						var from = match.index - 1 + lookbehindLength,
-							match = match[0].slice(lookbehindLength),
-							len = match.length,
-							to = from + len,
-							before = str.slice(0, from + 1),
-							after = str.slice(to + 1);
+						var from = match.index + (lookbehind ? match[1].length : 0);
+						// To be a valid candidate, the new match has to start inside of str
+						if (from >= str.length) {
+							continue;
+						}
+						var to = match.index + match[0].length,
+						    len = str.length + nextToken.length;
 
-						var args = [i, 1];
+						// Number of tokens to delete and replace with the new match
+						delNum = 3;
 
-						if (before) {
-							args.push(before);
+						if (to <= len) {
+							delNum = 2;
+							combStr = combStr.slice(0, len);
 						}
+						str = combStr;
+					}
 
-						var wrapped = new Token(token, inside? _.tokenize(match, inside) : match, alias);
+					if (!match) {
+						continue;
+					}
 
-						args.push(wrapped);
+					if(lookbehind) {
+						lookbehindLength = match[1].length;
+					}
 
-						if (after) {
-							args.push(after);
-						}
+					var from = match.index + lookbehindLength,
+					    match = match[0].slice(lookbehindLength),
+					    to = from + match.length,
+					    before = str.slice(0, from),
+					    after = str.slice(to);
+
+					var args = [i, delNum];
 
-						Array.prototype.splice.apply(strarr, args);
+					if (before) {
+						args.push(before);
 					}
+
+					var wrapped = new Token(token, inside? _.tokenize(match, inside) : match, alias, match);
+
+					args.push(wrapped);
+
+					if (after) {
+						args.push(after);
+					}
+
+					Array.prototype.splice.apply(strarr, args);
 				}
 			}
 		}
@@ -350,10 +395,12 @@ var _ = _self.Prism = {
 	}
 };
 
-var Token = _.Token = function(type, content, alias) {
+var Token = _.Token = function(type, content, alias, matchedStr) {
 	this.type = type;
 	this.content = content;
 	this.alias = alias;
+	// Copy of the full string this token was created from
+	this.matchedStr = matchedStr || null;
 };
 
 Token.stringify = function(o, language, parent) {
@@ -549,7 +596,10 @@ Prism.languages.clike = {
 			lookbehind: true
 		}
 	],
-	'string': /(["'])(\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
+	'string': {
+		pattern: /(["'])(\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
+		greedy: true
+	},
 	'class-name': {
 		pattern: /((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[a-z0-9_\.\\]+/i,
 		lookbehind: true,
@@ -575,13 +625,14 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 Prism.languages.insertBefore('javascript', 'keyword', {
 	'regex': {
 		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
-		lookbehind: true
+		lookbehind: true,
+		greedy: true
 	}
 });
 
 Prism.languages.insertBefore('javascript', 'class-name', {
 	'template-string': {
-		pattern: /`(?:\\`|\\?[^`])*`/,
+		pattern: /`(?:\\\\|\\?[^\\])*?`/,
 		inside: {
 			'interpolation': {
 				pattern: /\$\{[^}]+\}/,
@@ -950,6 +1001,23 @@ Prism.languages.go = Prism.languages.extend('clike', {
 });
 delete Prism.languages.go['class-name'];
 
+Prism.languages.lua = {
+	'comment': /^#!.+|--(?:\[(=*)\[[\s\S]*?\]\1\]|.*)/m,
+	// \z may be used to skip the following space
+	'string': /(["'])(?:(?!\1)[^\\\r\n]|\\z(?:\r\n|\s)|\\(?:\r\n|[\s\S]))*\1|\[(=*)\[[\s\S]*?\]\2\]/,
+	'number': /\b0x[a-f\d]+\.?[a-f\d]*(?:p[+-]?\d+)?\b|\b\d+(?:\.\B|\.?\d*(?:e[+-]?\d+)?\b)|\B\.\d+(?:e[+-]?\d+)?\b/i,
+	'keyword': /\b(?:and|break|do|else|elseif|end|false|for|function|goto|if|in|local|nil|not|or|repeat|return|then|true|until|while)\b/,
+	'function': /(?!\d)\w+(?=\s*(?:[({]))/,
+	'operator': [
+		/[-+*%^&|#]|\/\/?|<[<=]?|>[>=]?|[=~]=?/,
+		{
+			// Match ".." but don't break "..."
+			pattern: /(^|[^.])\.\.(?!\.)/,
+			lookbehind: true
+		}
+	],
+	'punctuation': /[\[\](){},;]|\.+|:+/
+};
 /**
  * Original by Aaron Harun: http://aahacreative.com/2012/07/31/php-syntax-highlighting-prism/
  * Modified by Miles Johnson: http://milesj.me

assets/javascripts/views/pages/lua.coffee

@@ -0,0 +1,6 @@
+#= require views/pages/base
+
+class app.views.LuaPage extends app.views.BasePage
+  prepare: ->
+    @highlightCode @findAllByTag('pre'), 'lua'
+    return