/*	Copyright (c) 2004-2006, The Dojo Foundation	All Rights Reserved.	Licensed under the Academic Free License version 2.1 or above OR the	modified BSD license. For more information on Dojo licensing, see:		http://dojotoolkit.org/community/licensing.shtml*/dojo.require("dojo.event");dojo.provide("dojo.event.topic");dojo.event.topic = new function(){	this.topics = {};	this.getTopic = function(topicName){		if(!this.topics[topicName]){			this.topics[topicName] = new this.TopicImpl(topicName);		}		return this.topics[topicName];	}	this.registerPublisher = function(topic, obj, funcName){		var topic = this.getTopic(topic);		topic.registerPublisher(obj, funcName);	}	this.subscribe = function(topic, obj, funcName){		var topic = this.getTopic(topic);		topic.subscribe(obj, funcName);	}	this.unsubscribe = function(topic, obj, funcName){		var topic = this.getTopic(topic);		topic.unsubscribe(obj, funcName);	}	this.destroy = function(topic){		this.getTopic(topic).destroy();		delete this.topics[topic];	}	this.publishApply = function(topic, args){		var topic = this.getTopic(topic);		topic.sendMessage.apply(topic, args);	}	this.publish = function(topic, message){		var topic = this.getTopic(topic);		// if message is an array, we treat it as a set of arguments,		// otherwise, we just pass on the arguments passed in as-is		var args = [];		// could we use concat instead here?		for(var x=1; x<arguments.length; x++){			args.push(arguments[x]);		}		topic.sendMessage.apply(topic, args);	}}dojo.event.topic.TopicImpl = function(topicName){	this.topicName = topicName;	this.subscribe = function(listenerObject, listenerMethod){		var tf = listenerMethod||listenerObject;		var to = (!listenerMethod) ? dj_global : listenerObject;		dojo.event.kwConnect({			srcObj:		this, 			srcFunc:	"sendMessage", 			adviceObj:	to,			adviceFunc: tf		});	}	this.unsubscribe = function(listenerObject, listenerMethod){		var tf = (!listenerMethod) ? listenerObject : listenerMethod;		var to = (!listenerMethod) ? null : listenerObject;		dojo.event.kwDisconnect({			srcObj:		this, 			srcFunc:	"sendMessage", 			adviceObj:	to,			adviceFunc: tf		});	}	this.destroy = function(){		dojo.event.MethodJoinPoint.getForMethod(this, "sendMessage").disconnect();	}	this.registerPublisher = function(publisherObject, publisherMethod){		dojo.event.connect(publisherObject, publisherMethod, this, "sendMessage");	}	this.sendMessage = function(message){		// The message has been propagated	}}