Add macrocall widget

Now the fields table works in the tiddler info popup

core/modules/new_widgets/macrocall.js

@@ -0,0 +1,59 @@
+/*\
+title: $:/core/modules/new_widgets/macrocall.js
+type: application/javascript
+module-type: new_widget
+
+Macrocall widget
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var Widget = require("$:/core/modules/new_widgets/widget.js").widget;
+
+var MacroCallWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+MacroCallWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+MacroCallWidget.prototype.render = function(parent,nextSibling) {
+	this.parentDomNode = parent;
+	this.computeAttributes();
+	this.execute();
+	this.renderChildren(parent,nextSibling);
+};
+
+/*
+Compute the internal state of the widget
+*/
+MacroCallWidget.prototype.execute = function() {
+	// Get the macro value
+	var text = this.getVariable(this.parseTreeNode.name,this.parseTreeNode.params);
+	// Parse the macro
+	var parser = this.wiki.new_parseText("text/vnd.tiddlywiki",text,
+						{parseAsInline: !this.parseTreeNode.isBlock}),
+		parseTreeNodes = parser ? parser.tree : [];
+	// Construct the child widgets
+	this.makeChildWidgets(parseTreeNodes);
+};
+
+/*
+Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
+*/
+MacroCallWidget.prototype.refresh = function(changedTiddlers) {
+	return this.refreshChildren(changedTiddlers);
+};
+
+exports.macrocall = MacroCallWidget;
+
+})();