Add a parser for TiddlyText

TiddlyText being plain text with macros and transclusions. It's the
equivalent of getRecursiveTiddlerText in classic TW

js/TiddlyTextParser.js

@@ -0,0 +1,58 @@
+/*\
+title: js/TiddlyTextParser.js
+
+Parses a plain text block that can also contain macros and transclusions.
+
+The syntax for transclusions is:
+
+	[[tiddlerTitle]]
+
+The syntax for macros is:
+
+	<<macroName params>>
+
+\*/
+(function(){
+
+/*jslint node: true */
+"use strict";
+
+var Dependencies = require("./Dependencies.js").Dependencies,
+	Renderer = require("./Renderer.js").Renderer,
+	utils = require("./Utils.js");
+
+var TiddlyTextParser = function(options) {
+	this.store = options.store;
+};
+
+TiddlyTextParser.prototype.parse = function(type,text) {
+	var output = [],
+		dependencies = new Dependencies(),
+		macroRegExp = /(?:\[\[([^\]]+)\]\])|(?:<<([^>\s]+)(?:\s*)((?:[^>]|(?:>(?!>)))*)>>)/mg,
+		lastMatchPos = 0,
+		match,
+		macroNode;
+	do {
+		match = macroRegExp.exec(text);
+		if(match) {
+			output.push(Renderer.TextNode(text.substring(lastMatchPos,match.index)));
+			if(match[1]) { // Transclusion
+				macroNode = Renderer.MacroNode("tiddler",{
+					target: match[1]
+				},[],this.store);
+			} else if(match[2]) { // Macro call
+				macroNode = Renderer.MacroNode(match[2],match[3],[],this.store);
+			}
+			output.push(macroNode);
+			dependencies.mergeDependencies(macroNode.dependencies);
+			lastMatchPos = match.index + match[0].length;
+		} else {
+			output.push(Renderer.TextNode(text.substr(lastMatchPos)));
+		}
+	} while(match);
+	return new Renderer(output,dependencies,this.store);
+};
+
+exports.TiddlyTextParser = TiddlyTextParser;
+
+})();