/*	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.provide("dojo.io.IframeIO");dojo.require("dojo.io.BrowserIO");dojo.require("dojo.uri.*");// FIXME: is it possible to use the Google htmlfile hack to prevent the// background click with this transport?dojo.io.createIFrame = function(fname, onloadstr){	if(window[fname]){ return window[fname]; }	if(window.frames[fname]){ return window.frames[fname]; }	var r = dojo.render.html;	var cframe = null;	var turi = dojo.uri.dojoUri("iframe_history.html?noInit=true");	var ifrstr = ((r.ie)&&(dojo.render.os.win)) ? "<iframe name='"+fname+"' src='"+turi+"' onload='"+onloadstr+"'>" : "iframe";	cframe = document.createElement(ifrstr);	with(cframe){		name = fname;		setAttribute("name", fname);		id = fname;	}	(document.body||document.getElementsByTagName("body")[0]).appendChild(cframe);	window[fname] = cframe;	with(cframe.style){		position = "absolute";		left = top = "0px";		height = width = "1px";		visibility = "hidden";		/*		if(djConfig.isDebug){			position = "relative";			height = "300px";			width = "600px";			visibility = "visible";		}		*/	}	if(!r.ie){		dojo.io.setIFrameSrc(cframe, turi, true);		cframe.onload = new Function(onloadstr);	}	return cframe;}// thanks burstlib!dojo.io.iframeContentWindow = function(iframe_el) {	var win = iframe_el.contentWindow || // IE		dojo.io.iframeContentDocument(iframe_el).defaultView || // Moz, opera		// Moz. TODO: is this available when defaultView isn't?		dojo.io.iframeContentDocument(iframe_el).__parent__ || 		(iframe_el.name && document.frames[iframe_el.name]) || null;	return win;}dojo.io.iframeContentDocument = function(iframe_el){	var doc = iframe_el.contentDocument || // W3		(			(iframe_el.contentWindow)&&(iframe_el.contentWindow.document)		) ||  // IE		(			(iframe_el.name)&&(document.frames[iframe_el.name])&&			(document.frames[iframe_el.name].document)		) || null;	return doc;}dojo.io.IframeTransport = new function(){	var _this = this;	this.currentRequest = null;	this.requestQueue = [];	this.iframeName = "dojoIoIframe";	this.fireNextRequest = function(){		if((this.currentRequest)||(this.requestQueue.length == 0)){ return; }		// dojo.debug("fireNextRequest");		var cr = this.currentRequest = this.requestQueue.shift();		cr._contentToClean = [];		var fn = cr["formNode"];		var content = cr["content"] || {};		if(cr.sendTransport) {			content["dojo.transport"] = "iframe";		}		if(fn){			if(content){				// if we have things in content, we need to add them to the form				// before submission				for(var x in content){					if(!fn[x]){						var tn;						if(dojo.render.html.ie){							tn = document.createElement("<input type='hidden' name='"+x+"' value='"+content[x]+"'>");							fn.appendChild(tn);						}else{							tn = document.createElement("input");							fn.appendChild(tn);							tn.type = "hidden";							tn.name = x;							tn.value = content[x];						}						cr._contentToClean.push(x);					}else{						fn[x].value = content[x];					}				}			}			if(cr["url"]){				cr._originalAction = fn.getAttribute("action");				fn.setAttribute("action", cr.url);			}			if(!fn.getAttribute("method")){				fn.setAttribute("method", (cr["method"]) ? cr["method"] : "post");			}			cr._originalTarget = fn.getAttribute("target");			fn.setAttribute("target", this.iframeName);			fn.target = this.iframeName;			fn.submit();		}else{			// otherwise we post a GET string by changing URL location for the			// iframe			var query = dojo.io.argsFromMap(this.currentRequest.content);			var tmpUrl = (cr.url.indexOf("?") > -1 ? "&" : "?") + query;			dojo.io.setIFrameSrc(this.iframe, tmpUrl, true);		}	}	this.canHandle = function(kwArgs){		return (			(				// FIXME: can we really handle text/plain and				// text/javascript requests?				dojo.lang.inArray(kwArgs["mimetype"], 				[	"text/plain", "text/html", 					"text/javascript", "text/json"])			)&&(				// make sur we really only get used in file upload cases					(kwArgs["formNode"])&&(dojo.io.checkChildrenForFile(kwArgs["formNode"]))			)&&(				dojo.lang.inArray(kwArgs["method"].toLowerCase(), ["post", "get"])			)&&(				// never handle a sync request				!  ((kwArgs["sync"])&&(kwArgs["sync"] == true))			)		);	}	this.bind = function(kwArgs){		if(!this["iframe"]){ this.setUpIframe(); }		this.requestQueue.push(kwArgs);		this.fireNextRequest();		return;	}	this.setUpIframe = function(){		// NOTE: IE 5.0 and earlier Mozilla's don't support an onload event for		//       iframes. OTOH, we don't care.		this.iframe = dojo.io.createIFrame(this.iframeName, "dojo.io.IframeTransport.iframeOnload();");	}	this.iframeOnload = function(){		if(!_this.currentRequest){			_this.fireNextRequest();			return;		}		var req = _this.currentRequest;		// remove all the hidden content inputs		var toClean = req._contentToClean;		for(var i = 0; i < toClean.length; i++) {			var key = toClean[i];			if(dojo.render.html.safari){				//In Safari (at least 2.0.3), can't use formNode[key] syntax to find the node,				//for nodes that were dynamically added.				var fNode = req.formNode;				for(var j = 0; j < fNode.childNodes.length; j++){					var chNode = fNode.childNodes[j];					if(chNode.name == key){						var pNode = chNode.parentNode;						pNode.removeChild(chNode);						break;					}				}			}else{				var input = req.formNode[key];				req.formNode.removeChild(input);				req.formNode[key] = null;			}		}		// restore original action + target		if(req["_originalAction"]){			req.formNode.setAttribute("action", req._originalAction);		}		req.formNode.setAttribute("target", req._originalTarget);		req.formNode.target = req._originalTarget;		var ifd = dojo.io.iframeContentDocument(_this.iframe);		// handle successful returns		// FIXME: how do we determine success for iframes? Is there an equiv of		// the "status" property?		var value;		var success = false;		try{			var cmt = req.mimetype;			if((cmt == "text/javascript")||(cmt == "text/json")){				// FIXME: not sure what to do here? try to pull some evalulable				// text from a textarea or cdata section? 				// how should we set up the contract for that?				var js = ifd.getElementsByTagName("textarea")[0].value;				if(cmt == "text/json") { js = "(" + js + ")"; }				value = dj_eval(js);			}else if(cmt == "text/html"){				value = ifd;			}else{ // text/plain				value = ifd.getElementsByTagName("textarea")[0].value;			}			success = true;		}catch(e){ 			// looks like we didn't get what we wanted!			var errObj = new dojo.io.Error("IframeTransport Error");			if(dojo.lang.isFunction(req["error"])){				req.error("error", errObj, req);			}		}		// don't want to mix load function errors with processing errors, thus		// a separate try..catch		try {			if(success && dojo.lang.isFunction(req["load"])){				req.load("load", value, req);			}		} catch(e) {			throw e;		} finally {			_this.currentRequest = null;			_this.fireNextRequest();		}	}	dojo.io.transports.addTransport("IframeTransport");}