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412 lines
13 KiB
JavaScript
412 lines
13 KiB
JavaScript
/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojo.io.iframe"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo.io.iframe"] = true;
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dojo.provide("dojo.io.iframe");
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/*=====
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dojo.declare("dojo.io.iframe.__ioArgs", dojo.__IoArgs, {
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constructor: function(){
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// summary:
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// All the properties described in the dojo.__ioArgs type, apply
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// to this type. The following additional properties are allowed
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// for dojo.io.iframe.send():
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// method: String?
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// The HTTP method to use. "GET" or "POST" are the only supported
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// values. It will try to read the value from the form node's
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// method, then try this argument. If neither one exists, then it
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// defaults to POST.
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// handleAs: String?
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// Specifies what format the result data should be given to the
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// load/handle callback. Valid values are: text, html, xml, json,
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// javascript. IMPORTANT: For all values EXCEPT html and xml, The
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// server response should be an HTML file with a textarea element.
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// The response data should be inside the textarea element. Using an
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// HTML document the only reliable, cross-browser way this
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// transport can know when the response has loaded. For the html
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// handleAs value, just return a normal HTML document. NOTE: xml
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// is now supported with this transport (as of 1.1+); a known issue
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// is if the XML document in question is malformed, Internet Explorer
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// will throw an uncatchable error.
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// content: Object?
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// If "form" is one of the other args properties, then the content
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// object properties become hidden form form elements. For
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// instance, a content object of {name1 : "value1"} is converted
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// to a hidden form element with a name of "name1" and a value of
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// "value1". If there is not a "form" property, then the content
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// object is converted into a name=value&name=value string, by
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// using dojo.objectToQuery().
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this.method = method;
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this.handleAs = handleAs;
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this.content = content;
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}
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});
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=====*/
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dojo.io.iframe = {
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// summary:
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// Sends an Ajax I/O call using and Iframe (for instance, to upload files)
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create: function(/*String*/fname, /*String*/onloadstr, /*String?*/uri){
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// summary:
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// Creates a hidden iframe in the page. Used mostly for IO
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// transports. You do not need to call this to start a
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// dojo.io.iframe request. Just call send().
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// fname: String
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// The name of the iframe. Used for the name attribute on the
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// iframe.
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// onloadstr: String
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// A string of JavaScript that will be executed when the content
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// in the iframe loads.
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// uri: String
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// The value of the src attribute on the iframe element. If a
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// value is not given, then dojo/resources/blank.html will be
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// used.
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if(window[fname]){ return window[fname]; }
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if(window.frames[fname]){ return window.frames[fname]; }
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var cframe = null;
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var turi = uri;
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if(!turi){
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if(dojo.config["useXDomain"] && !dojo.config["dojoBlankHtmlUrl"]){
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console.warn("dojo.io.iframe.create: When using cross-domain Dojo builds,"
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+ " please save dojo/resources/blank.html to your domain and set djConfig.dojoBlankHtmlUrl"
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+ " to the path on your domain to blank.html");
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}
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turi = (dojo.config["dojoBlankHtmlUrl"]||dojo.moduleUrl("dojo", "resources/blank.html"));
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}
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var ifrstr = dojo.isIE ? '<iframe name="'+fname+'" src="'+turi+'" onload="'+onloadstr+'">' : 'iframe';
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cframe = dojo.doc.createElement(ifrstr);
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with(cframe){
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name = fname;
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setAttribute("name", fname);
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id = fname;
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}
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dojo.body().appendChild(cframe);
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window[fname] = cframe;
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with(cframe.style){
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if(!(dojo.isSafari < 3)){
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//We can't change the src in Safari 2.0.3 if absolute position. Bizarro.
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position = "absolute";
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}
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left = top = "1px";
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height = width = "1px";
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visibility = "hidden";
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}
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if(!dojo.isIE){
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this.setSrc(cframe, turi, true);
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cframe.onload = new Function(onloadstr);
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}
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return cframe;
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},
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setSrc: function(/*DOMNode*/iframe, /*String*/src, /*Boolean*/replace){
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//summary:
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// Sets the URL that is loaded in an IFrame. The replace parameter
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// indicates whether location.replace() should be used when
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// changing the location of the iframe.
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try{
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if(!replace){
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if(dojo.isWebKit){
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iframe.location = src;
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}else{
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frames[iframe.name].location = src;
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}
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}else{
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// Fun with DOM 0 incompatibilities!
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var idoc;
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//WebKit > 521 corresponds with Safari 3, which started with 522 WebKit version.
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if(dojo.isIE || dojo.isWebKit > 521){
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idoc = iframe.contentWindow.document;
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}else if(dojo.isSafari){
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idoc = iframe.document;
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}else{ // if(d.isMozilla){
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idoc = iframe.contentWindow;
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}
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//For Safari (at least 2.0.3) and Opera, if the iframe
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//has just been created but it doesn't have content
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//yet, then iframe.document may be null. In that case,
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//use iframe.location and return.
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if(!idoc){
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iframe.location = src;
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return;
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}else{
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idoc.location.replace(src);
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}
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}
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}catch(e){
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console.log("dojo.io.iframe.setSrc: ", e);
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}
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},
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doc: function(/*DOMNode*/iframeNode){
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//summary: Returns the document object associated with the iframe DOM Node argument.
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var doc = iframeNode.contentDocument || // W3
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(
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(
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(iframeNode.name) && (iframeNode.document) &&
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(dojo.doc.getElementsByTagName("iframe")[iframeNode.name].contentWindow) &&
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(dojo.doc.getElementsByTagName("iframe")[iframeNode.name].contentWindow.document)
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)
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) || // IE
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(
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(iframeNode.name)&&(dojo.doc.frames[iframeNode.name])&&
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(dojo.doc.frames[iframeNode.name].document)
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) || null;
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return doc;
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},
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send: function(/*dojo.io.iframe.__ioArgs*/args){
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//summary:
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// Function that sends the request to the server.
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// This transport can only process one send() request at a time, so if send() is called
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//multiple times, it will queue up the calls and only process one at a time.
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if(!this["_frame"]){
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this._frame = this.create(this._iframeName, dojo._scopeName + ".io.iframe._iframeOnload();");
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}
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//Set up the deferred.
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var dfd = dojo._ioSetArgs(
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args,
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function(/*Deferred*/dfd){
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//summary: canceller function for dojo._ioSetArgs call.
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dfd.canceled = true;
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dfd.ioArgs._callNext();
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},
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function(/*Deferred*/dfd){
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//summary: okHandler function for dojo._ioSetArgs call.
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var value = null;
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try{
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var ioArgs = dfd.ioArgs;
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var dii = dojo.io.iframe;
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var ifd = dii.doc(dii._frame);
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var handleAs = ioArgs.handleAs;
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//Assign correct value based on handleAs value.
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value = ifd; //html
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if(handleAs != "html"){
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if(handleAs == "xml"){
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// FF, Saf 3+ and Opera all seem to be fine with ifd being xml. We have to
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// do it manually for IE. Refs #6334.
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if(dojo.isIE){
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dojo.query("a", dii._frame.contentWindow.document.documentElement).orphan();
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var xmlText=(dii._frame.contentWindow.document).documentElement.innerText;
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xmlText=xmlText.replace(/>\s+</g, "><");
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xmlText=dojo.trim(xmlText);
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//Reusing some code in base dojo for handling XML content. Simpler and keeps
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//Core from duplicating the effort needed to locate the XML Parser on IE.
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var fauxXhr = { responseText: xmlText };
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value = dojo._contentHandlers["xml"](fauxXhr); // DOMDocument
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}
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}else{
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value = ifd.getElementsByTagName("textarea")[0].value; //text
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if(handleAs == "json"){
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value = dojo.fromJson(value); //json
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}else if(handleAs == "javascript"){
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value = dojo.eval(value); //javascript
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}
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}
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}
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}catch(e){
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value = e;
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}finally{
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ioArgs._callNext();
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}
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return value;
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},
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function(/*Error*/error, /*Deferred*/dfd){
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//summary: errHandler function for dojo._ioSetArgs call.
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dfd.ioArgs._hasError = true;
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dfd.ioArgs._callNext();
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return error;
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}
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);
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//Set up a function that will fire the next iframe request. Make sure it only
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//happens once per deferred.
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dfd.ioArgs._callNext = function(){
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if(!this["_calledNext"]){
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this._calledNext = true;
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dojo.io.iframe._currentDfd = null;
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dojo.io.iframe._fireNextRequest();
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}
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}
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this._dfdQueue.push(dfd);
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this._fireNextRequest();
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//Add it the IO watch queue, to get things like timeout support.
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dojo._ioWatch(
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dfd,
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function(/*Deferred*/dfd){
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//validCheck
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return !dfd.ioArgs["_hasError"];
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},
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function(dfd){
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//ioCheck
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return (!!dfd.ioArgs["_finished"]);
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},
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function(dfd){
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//resHandle
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if(dfd.ioArgs._finished){
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dfd.callback(dfd);
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}else{
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dfd.errback(new Error("Invalid dojo.io.iframe request state"));
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}
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}
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);
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return dfd;
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},
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_currentDfd: null,
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_dfdQueue: [],
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_iframeName: dojo._scopeName + "IoIframe",
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_fireNextRequest: function(){
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//summary: Internal method used to fire the next request in the bind queue.
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try{
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if((this._currentDfd)||(this._dfdQueue.length == 0)){ return; }
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//Find next deferred, skip the canceled ones.
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do{
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var dfd = this._currentDfd = this._dfdQueue.shift();
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} while(dfd && dfd.canceled && this._dfdQueue.length);
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//If no more dfds, cancel.
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if(!dfd || dfd.canceled){
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this._currentDfd = null;
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return;
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}
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var ioArgs = dfd.ioArgs;
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var args = ioArgs.args;
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ioArgs._contentToClean = [];
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var fn = dojo.byId(args["form"]);
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var content = args["content"] || {};
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if(fn){
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if(content){
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// if we have things in content, we need to add them to the form
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// before submission
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var pHandler = function(name, value) {
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var tn;
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if(dojo.isIE){
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tn = dojo.doc.createElement("<input type='hidden' name='"+name+"'>");
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}else{
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tn = dojo.doc.createElement("input");
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tn.type = "hidden";
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tn.name = name;
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}
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tn.value = value;
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fn.appendChild(tn);
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ioArgs._contentToClean.push(name);
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};
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for(var x in content){
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var val = content[x];
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if(dojo.isArray(val) && val.length > 1){
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var i;
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for (i = 0; i < val.length; i++) {
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pHandler(x,val[i]);
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}
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}else{
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if(!fn[x]){
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pHandler(x,val);
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}else{
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fn[x].value = val;
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}
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}
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}
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}
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//IE requires going through getAttributeNode instead of just getAttribute in some form cases,
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//so use it for all. See #2844
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var actnNode = fn.getAttributeNode("action");
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var mthdNode = fn.getAttributeNode("method");
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var trgtNode = fn.getAttributeNode("target");
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if(args["url"]){
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ioArgs._originalAction = actnNode ? actnNode.value : null;
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if(actnNode){
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actnNode.value = args.url;
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}else{
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fn.setAttribute("action",args.url);
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}
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}
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if(!mthdNode || !mthdNode.value){
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if(mthdNode){
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mthdNode.value= (args["method"]) ? args["method"] : "post";
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}else{
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fn.setAttribute("method", (args["method"]) ? args["method"] : "post");
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}
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}
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ioArgs._originalTarget = trgtNode ? trgtNode.value: null;
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if(trgtNode){
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trgtNode.value = this._iframeName;
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}else{
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fn.setAttribute("target", this._iframeName);
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}
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fn.target = this._iframeName;
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dojo._ioNotifyStart(dfd);
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fn.submit();
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}else{
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// otherwise we post a GET string by changing URL location for the
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// iframe
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var tmpUrl = args.url + (args.url.indexOf("?") > -1 ? "&" : "?") + ioArgs.query;
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dojo._ioNotifyStart(dfd);
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this.setSrc(this._frame, tmpUrl, true);
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}
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}catch(e){
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dfd.errback(e);
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}
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},
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_iframeOnload: function(){
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var dfd = this._currentDfd;
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if(!dfd){
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this._fireNextRequest();
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return;
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}
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var ioArgs = dfd.ioArgs;
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var args = ioArgs.args;
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var fNode = dojo.byId(args.form);
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if(fNode){
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// remove all the hidden content inputs
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var toClean = ioArgs._contentToClean;
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for(var i = 0; i < toClean.length; i++) {
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var key = toClean[i];
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//Need to cycle over all nodes since we may have added
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//an array value which means that more than one node could
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//have the same .name value.
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for(var j = 0; j < fNode.childNodes.length; j++){
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var chNode = fNode.childNodes[j];
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if(chNode.name == key){
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dojo.destroy(chNode);
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break;
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}
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}
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}
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// restore original action + target
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if(ioArgs["_originalAction"]){
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fNode.setAttribute("action", ioArgs._originalAction);
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}
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if(ioArgs["_originalTarget"]){
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fNode.setAttribute("target", ioArgs._originalTarget);
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fNode.target = ioArgs._originalTarget;
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}
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}
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ioArgs._finished = true;
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}
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}
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}
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