text: /*\
  title: $:/core/modules/widgets/macrocall.js
  type: application/javascript
  module-type: widget
  
  Macrocall widget
  
  \*/
  (function(){
  
  /*jslint node: true, browser: true */
  /*global $tw: false */
  "use strict";
  
  var Widget = require("$:/core/modules/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 parse type if specified
  	this.parseType = this.getAttribute("$type","text/vnd.tiddlywiki");
  	this.renderOutput = this.getAttribute("$output","text/html");
  	// Merge together the parameters specified in the parse tree with the specified attributes
  	var params = this.parseTreeNode.params ? this.parseTreeNode.params.slice(0) : [];
  	$tw.utils.each(this.attributes,function(attribute,name) {
  		if(name.charAt(0) !== "$") {
  			params.push({name: name, value: attribute});			
  		}
  	});
  	// Get the macro value
  	var macroName = this.parseTreeNode.name || this.getAttribute("$name"),
  		variableInfo = this.getVariableInfo(macroName,{params: params}),
  		text = variableInfo.text,
  		parseTreeNodes;
  	// Are we rendering to HTML?
  	if(this.renderOutput === "text/html") {
  		// If so we'll return the parsed macro
  		var parser = this.wiki.parseText(this.parseType,text,
  							{parseAsInline: !this.parseTreeNode.isBlock});
  		parseTreeNodes = parser ? parser.tree : [];
  		// Wrap the parse tree in a vars widget assigning the parameters to variables named "__paramname__"
  		var attributes = {};
  		$tw.utils.each(variableInfo.params,function(param) {
  			var name = "__" + param.name + "__";
  			attributes[name] = {
  				name: name,
  				type: "string",
  				value: param.value
  			};
  		});
  		parseTreeNodes = [{
  			type: "vars",
  			attributes: attributes,
  			children: parseTreeNodes
  		}];
  	} else if(this.renderOutput === "text/raw") {
  		parseTreeNodes = [{type: "text", text: text}];
  	} else {
  		// Otherwise, we'll render the text
  		var plainText = this.wiki.renderText("text/plain",this.parseType,text,{parentWidget: this});
  		parseTreeNodes = [{type: "text", text: plainText}];
  	}
  	// 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) {
  	var changedAttributes = this.computeAttributes();
  	if($tw.utils.count(changedAttributes) > 0) {
  		// Rerender ourselves
  		this.refreshSelf();
  		return true;
  	} else {
  		return this.refreshChildren(changedTiddlers);
  	}
  };
  
  exports.macrocall = MacroCallWidget;
  
  })();
  