hedera-web/js/vn/scope.js

var VnObject = require ('./object');

var scopeUid = 0;

module.exports = new Class
({
	Extends: VnObject

	,initialize: function (builder, objects, signalData, parentScope, extraObjects)
	{
		this.builder = builder;
		this.objects = objects;
		this.signalData = signalData;
		this.parentScope = parentScope;
		this.uid = ++scopeUid;
		this.extraObjects = extraObjects;

		if (!signalData && parentScope)
			this.signalData = parentScope.signalData;

		this.parent ();
	}

	,getMain: function ()
	{
		return this.builder.getMain (this);
	}
	
	/**
	 * Fetchs an element by it's identifier.
	 *
	 * @param {String} id The node identifier
	 * @return {Object} The object or %null if it doesn't exists
	 */
	,$: function (id)
	{
		var object;
		var index = this.builder.getById (id);

		if (index !== undefined)
			object = this.objects[index];
		else
		{
			object = this.extraObjects[id];

			if (object === undefined && this.parentScope)
				object = this.parentScope.getById (id);
		}

		return object ? object : null;
	}
	
	/**
	 * Fetchs an element by it's identifier.
	 *
	 * @param {String} id The node identifier
	 * @return {Object} The object or %null if it doesn't exists
	 */
	,getById: function (id)
	{
		return this.$(id);
	}
	
	/**
	 * Fetchs a set of elements by it's tag name.
	 *
	 * @param {String} tagName The object tag name
	 * @return {Array[Object]} The list of objects or an empty array
	 */
	,getByTagName: function (tagName)
	{
		return this.builder.getByTagName (this, tagName);
	}

	/**
	 * Links all scope objects and connects it's events.
	 */
	,link: function ()
	{
		this.builder.link (this);
	}

	,getMethod: function (value, binded)
	{	
		if (this.signalData)
		{
			var method = this.signalData[value];

			if (method && binded)
				method = method.bind (this.signalData);
		}
		else
			var method = window[value];

		if (method === undefined)
			this.builder._showError ('Function \'%s\' not found', value);

		return method;
	}

	,getHtmlId: function (nodeId)
	{
		return 'vn-'+ this.uid +'-'+ nodeId;
	}
	
	,_destroy: function ()
	{
		var objects = this.objects;
	
		for (var i = objects.length; i--;)
		if (objects[i] instanceof VnObject)
		{
			objects[i].unref ();
			objects[i].disconnectByInstance (this.builder.signalData);
		}

		this.parent ();
	}
});