1 /* Licensed to the Apache Software Foundation (ASF) under one or more
  2  * contributor license agreements.  See the NOTICE file distributed with
  3  * this work for additional information regarding copyright ownership.
  4  * The ASF licenses this file to you under the Apache License, Version 2.0
  5  * (the "License"); you may not use this file except in compliance with
  6  * the License.  You may obtain a copy of the License at
  7  *
  8  *      http://www.apache.org/licenses/LICENSE-2.0
  9  *
 10  * Unless required by applicable law or agreed to in writing, software
 11  * distributed under the License is distributed on an "AS IS" BASIS,
 12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  * See the License for the specific language governing permissions and
 14  * limitations under the License.
 15  */
 16 
 17 /**
 18  * @class
 19  * @name _AjaxResponse
 20  * @memberOf myfaces._impl.xhrCore
 21  * @extends myfaces._impl.core.Object
 22  * @description
 23  * This singleton is responsible for handling the standardized xml ajax response
 24  * Note: since the semantic processing can be handled about 90% in a functional
 25  * style we make this class stateless. Every state information is stored
 26  * temporarily in the context.
 27  *
 28  * The singleton approach also improves performance
 29  * due to less object gc compared to the old instance approach.
 30  *
 31  */
 32 _MF_SINGLTN(_PFX_XHR + "_AjaxResponse", _MF_OBJECT, /** @lends myfaces._impl.xhrCore._AjaxResponse.prototype */ {
 33 
 34     /*partial response types*/
 35     RESP_PARTIAL : "partial-response",
 36     RESP_TYPE_ERROR : "error",
 37     RESP_TYPE_REDIRECT : "redirect",
 38     RESP_TYPE_CHANGES : "changes",
 39 
 40     /*partial commands*/
 41     CMD_CHANGES : "changes",
 42     CMD_UPDATE : "update",
 43     CMD_DELETE : "delete",
 44     CMD_INSERT : "insert",
 45     CMD_EVAL : "eval",
 46     CMD_ERROR : "error",
 47     CMD_ATTRIBUTES : "attributes",
 48     CMD_EXTENSION : "extension",
 49     CMD_REDIRECT : "redirect",
 50 
 51     /*other constants*/
 52     P_VIEWSTATE: "javax.faces.ViewState",
 53     P_VIEWROOT: "javax.faces.ViewRoot",
 54     P_VIEWHEAD: "javax.faces.ViewHead",
 55     P_VIEWBODY: "javax.faces.ViewBody",
 56 
 57 
 58     /**
 59      * uses response to start Html element replacement
 60      *
 61      * @param {Object} request (xhrRequest) - xhr request object
 62      * @param {Object} context (Map) - AJAX context
 63      *
 64      * A special handling has to be added to the update cycle
 65      * according to the JSDoc specs if the CDATA block contains html tags the outer rim must be stripped
 66      * if the CDATA block contains a head section the document head must be replaced
 67      * and if the CDATA block contains a body section the document body must be replaced!
 68      *
 69      */
 70     processResponse : function(request, context) {
 71         //mfinternal handling, note, the mfinternal is only optional
 72         //according to the spec
 73         context._mfInternal =  context._mfInternal || {};
 74         var mfInternal = context._mfInternal;
 75 
 76         //the temporary data is hosted here
 77         mfInternal._updateElems = [];
 78         mfInternal._updateForms = [];
 79         mfInternal.appliedViewState = null;
 80 
 81         try {
 82             var _Impl = this.attr("impl"), _Lang = this._Lang;
 83             // TODO:
 84             // Solution from
 85             // http://www.codingforums.com/archive/index.php/t-47018.html
 86             // to solve IE error 1072896658 when a Java server sends iso88591
 87             // istead of ISO-8859-1
 88 
 89             if (!request || !_Lang.exists(request, "responseXML")) {
 90                 throw this.makeException(new Error(), _Impl.EMPTY_RESPONSE, _Impl.EMPTY_RESPONSE, this._nameSpace, "processResponse", "");
 91             }
 92             //check for a parseError under certain browsers
 93 
 94             var xmlContent = request.responseXML;
 95             //ie6+ keeps the parsing response under xmlContent.parserError
 96             //while the rest of the world keeps it as element under the first node
 97             var xmlErr = _Lang.fetchXMLErrorMessage(request.responseText || request.response, xmlContent)
 98             if (xmlErr) {
 99                 throw this._raiseError(new Error(),xmlErr.errorMessage+"\n"+xmlErr.sourceText+"\n"+xmlErr.visualError+"\n", "processResponse");
100             }
101             var partials = xmlContent.childNodes[0];
102             if ('undefined' == typeof partials || partials == null) {
103                 throw this._raiseError(new Error(),"No child nodes for response", "processResponse");
104 
105             } else {
106                 if (partials.tagName != this.RESP_PARTIAL) {
107                     // IE 8 sees XML Header as first sibling ...
108                     partials = partials.nextSibling;
109                     if (!partials || partials.tagName != this.RESP_PARTIAL) {
110                         throw this._raiseError(new Error(), "Partial response not set","processResponse");
111                     }
112                 }
113             }
114 
115             var childNodesLength = partials.childNodes.length;
116 
117             for (var loop = 0; loop < childNodesLength; loop++) {
118                 var childNode = partials.childNodes[loop];
119                 var tagName = childNode.tagName;
120                 /**
121                  * <eval>
122                  *      <![CDATA[javascript]]>
123                  * </eval>
124                  */
125 
126                 //this ought to be enough for eval
127                 //however the run scripts still makes sense
128                 //in the update and insert area for components
129                 //which do not use the response writer properly
130                 //we might add this one as custom option in update and
131                 //insert!
132                 if (tagName == this.CMD_ERROR) {
133                     this.processError(request, context, childNode);
134                 } else if (tagName == this.CMD_REDIRECT) {
135                     this.processRedirect(request, context, childNode);
136                 } else if (tagName == this.CMD_CHANGES) {
137                     this.processChanges(request, context, childNode);
138                 }
139             }
140 
141             //fixup missing viewStates due to spec deficiencies
142             this.fixViewStates(context);
143 
144             //spec jsdoc, the success event must be sent from response
145             _Impl.sendEvent(request, context, _Impl["SUCCESS"]);
146 
147         } finally {
148             delete mfInternal._updateElems;
149             delete mfInternal._updateForms;
150             delete mfInternal.appliedViewState;
151         }
152     },
153 
154     /**
155      * fixes the viewstates in the current page
156      *
157      * @param context
158      */
159     fixViewStates : function(context) {
160         var _Lang = this._Lang;
161         var mfInternal = context._mfInternal;
162 
163         if (null == mfInternal.appliedViewState) {
164             return;
165         }
166 
167         //if we set our no portlet env we safely can update all forms with
168         //the new viewstate
169         if (this._RT.getLocalOrGlobalConfig(context, "no_portlet_env", false)) {
170             for (var cnt = document.forms.length - 1; cnt >= 0; cnt --) {
171                 this._setVSTForm(context, document.forms[cnt]);
172             }
173             return;
174         }
175 
176         // Now update the forms that were not replaced but forced to be updated, because contains child ajax tags
177         // we should only update forms with view state hidden field. If by some reason, the form was set to be
178         // updated but the form was replaced, it does not have hidden view state, so later in changeTrace processing the
179         // view state is updated.
180 
181         //set the viewstates of all outer forms parents of our updated elements
182         var _T = this;
183         _Lang.arrForEach(mfInternal._updateForms, function(elem) {
184             _T._setVSTForm(context, elem);
185         }, 0, this);
186 
187         //set the viewstate of all forms within our updated elements
188         _Lang.arrForEach(mfInternal._updateElems, function(elem) {
189             _T._setVSTInnerForms(context, elem);
190         }, 0, this);
191     }
192     ,
193 
194     /**
195      * sets the viewstate element in a given form
196      *
197      * @param theForm the form to which the element has to be set to
198      * @param context the current request context
199      */
200     _setVSTForm: function(context, theForm) {
201         theForm = this._Lang.byId(theForm);
202         var mfInternal = context._mfInternal;
203 
204         if (!theForm) return;
205 
206         var viewStateField = (theForm.elements) ? theForm.elements[this.P_VIEWSTATE] : null;//this._Dom.findFormElement(elem, this.P_VIEWSTATE);
207 
208         if (viewStateField) {
209             this._Dom.setAttribute(viewStateField, "value", mfInternal.appliedViewState);
210         } else if (!viewStateField) {
211             var element = this._Dom.getDummyPlaceHolder();
212             //spec error, two elements with the same id should not be there, TODO recheck the space if the name does not suffice alone
213             element.innerHTML = ["<input type='hidden'", "id='", this.P_VIEWSTATE ,"' name='", this.P_VIEWSTATE ,"' value='" , mfInternal.appliedViewState , "' />"].join("");
214             //now we go to proper dom handling after having to deal with another ie screwup
215             try {
216                 theForm.appendChild(element.childNodes[0]);
217             } finally {
218                 element.innerHTML = "";
219             }
220         }
221     }
222     ,
223 
224     _setVSTInnerForms: function(context, elem) {
225 
226         var _Lang = this._Lang, _Dom = this._Dom;
227         elem = _Dom.byIdOrName(elem);
228         //elem not found for whatever reason
229         //https://issues.apache.org/jira/browse/MYFACES-3544
230         if(!elem) return;
231 
232         var replacedForms = _Dom.findByTagName(elem, "form", false);
233         var applyVST = _Lang.hitch(this, function(elem) {
234             this._setVSTForm(context, elem);
235         });
236 
237         try {
238             _Lang.arrForEach(replacedForms, applyVST, 0, this);
239         } finally {
240             applyVST = null;
241         }
242     },
243 
244     /**
245      * processes an incoming error from the response
246      * which is hosted under the <error> tag
247      * @param request the current request
248      * @param context the contect object
249      * @param node the node in the xml hosting the error message
250      */
251     processError : function(request, context, node) {
252         /**
253          * <error>
254          *      <error-name>String</error-name>
255          *      <error-message><![CDATA[message]]></error-message>
256          * <error>
257          */
258         var errorName = node.firstChild.textContent || "",
259                 errorMessage = node.childNodes[1].firstChild.data || "";
260 
261         this.attr("impl").sendError(request, context, this.attr("impl").SERVER_ERROR, errorName, errorMessage, "myfaces._impl.xhrCore._AjaxResponse", "processError");
262     },
263 
264     /**
265      * processes an incoming xml redirect directive from the ajax response
266      * @param request the request object
267      * @param context the context
268      * @param node the node hosting the redirect data
269      */
270     processRedirect : function(request, context, node) {
271         /**
272          * <redirect url="url to redirect" />
273          */
274         var _Lang = this._Lang;
275         var redirectUrl = node.getAttribute("url");
276         if (!redirectUrl) {
277             throw this._raiseError(new Error(),_Lang.getMessage("ERR_RED_URL", null, "_AjaxResponse.processRedirect"),"processRedirect");
278         }
279         redirectUrl = _Lang.trim(redirectUrl);
280         if (redirectUrl == "") {
281             return false;
282         }
283         window.location = redirectUrl;
284         return true;
285     }
286     ,
287 
288     /**
289      * main entry point for processing the changes
290      * it deals with the <changes> node of the
291      * response
292      *
293      * @param request the xhr request object
294      * @param context the context map
295      * @param node the changes node to be processed
296      */
297     processChanges : function(request, context, node) {
298         var changes = node.childNodes;
299         var _Lang = this._Lang;
300         //note we need to trace the changes which could affect our insert update or delete
301         //se that we can realign our ViewStates afterwards
302         //the realignment must happen post change processing
303 
304         for (var i = 0; i < changes.length; i++) {
305 
306             switch (changes[i].tagName) {
307 
308                 case this.CMD_UPDATE:
309                     this.processUpdate(request, context, changes[i]);
310                     break;
311                 case this.CMD_EVAL:
312                     _Lang.globalEval(changes[i].firstChild.data);
313                     break;
314                 case this.CMD_INSERT:
315                     this.processInsert(request, context, changes[i]);
316                     break;
317                 case this.CMD_DELETE:
318                     this.processDelete(request, context, changes[i]);
319                     break;
320                 case this.CMD_ATTRIBUTES:
321                     this.processAttributes(request, context, changes[i]);
322                     break;
323                 case this.CMD_EXTENSION:
324                     break;
325                 default:
326                     throw this._raiseError(new Error(),"_AjaxResponse.processChanges: Illegal Command Issued","processChanges");
327             }
328         }
329 
330         return true;
331     }
332     ,
333 
334     /**
335      * First sub-step process a pending update tag
336      *
337      * @param request the xhr request object
338      * @param context the context map
339      * @param node the changes node to be processed
340      */
341     processUpdate : function(request, context, node) {
342         if (node.getAttribute('id') == this.P_VIEWSTATE) {
343             //update the submitting forms viewstate to the new value
344             // The source form has to be pulled out of the CURRENT document first because the context object
345             // may refer to an invalid document if an update of the entire body has occurred before this point.
346             var mfInternal = context._mfInternal,
347                 fuzzyFormDetection = this._Lang.hitch(this._Dom, this._Dom.fuzzyFormDetection);
348             var elemId = (mfInternal._mfSourceControlId)? mfInternal._mfSourceControlId:
349                             ((context.source)?context.source.id: null);
350 
351                     //theoretically a source of null can be given, then our form detection fails for
352                     //the source element case and hence updateviewstate is skipped for the source
353                     //form, but still render targets still can get the viewstate
354             var sourceForm = (mfInternal && mfInternal["_mfSourceFormId"] &&
355                            document.forms[mfInternal["_mfSourceFormId"]]) ?
356                            document.forms[mfInternal["_mfSourceFormId"]] : ((elemId)? fuzzyFormDetection(elemId): null);
357 
358             mfInternal.appliedViewState = node.firstChild.nodeValue;
359             //source form could not be determined either over the form identifer or the element
360             //we now skip this phase and just add everything we need for the fixup code
361 
362             if (!sourceForm) {
363                 //no source form found is not an error because
364                 //we might be able to recover one way or the other
365                 return true;
366             }
367 
368             mfInternal._updateForms.push(sourceForm.id);
369             //this._setVSTForm(sourceForm);
370         }
371         else {
372             // response may contain several blocks
373             var cDataBlock = this._Dom.concatCDATABlocks(node),
374                     resultNode = null,
375                     pushOpRes = this._Lang.hitch(this, this._pushOperationResult);
376 
377             switch (node.getAttribute('id')) {
378                 case this.P_VIEWROOT:
379 
380                     cDataBlock = cDataBlock.substring(cDataBlock.indexOf("<html"));
381 
382                     var parsedData = this._replaceHead(request, context, cDataBlock);
383 
384                     resultNode = ('undefined' != typeof parsedData && null != parsedData) ? this._replaceBody(request, context, cDataBlock, parsedData) : this._replaceBody(request, context, cDataBlock);
385                     if (resultNode) {
386                         pushOpRes(context, resultNode);
387                     }
388                     break;
389                 case this.P_VIEWHEAD:
390                     //we cannot replace the head, almost no browser allows this, some of them throw errors
391                     //others simply ignore it or replace it and destroy the dom that way!
392                     this._replaceHead(request, context, cDataBlock);
393 
394                     break;
395                 case this.P_VIEWBODY:
396                     //we assume the cdata block is our body including the tag
397                     resultNode = this._replaceBody(request, context, cDataBlock);
398                     if (resultNode) {
399                         pushOpRes(context, resultNode);
400                     }
401                     break;
402 
403                 default:
404                     resultNode = this.replaceHtmlItem(request, context, node.getAttribute('id'), cDataBlock);
405                     if (resultNode) {
406                         pushOpRes(context, resultNode);
407                     }
408                     break;
409             }
410         }
411 
412         return true;
413     }
414     ,
415 
416     _pushOperationResult: function(context, resultNode) {
417         var mfInternal = context._mfInternal;
418         var pushSubnode = this._Lang.hitch(this, function(currNode) {
419             var parentForm = this._Dom.getParent(currNode, "form");
420             //if possible we work over the ids
421             //so that elements later replaced are referenced
422             //at the latest possibility
423             if (null != parentForm) {
424                 mfInternal._updateForms.push(parentForm.id || parentForm);
425             }
426             else {
427                 mfInternal._updateElems.push(currNode.id || currNode);
428             }
429         });
430         var isArr = 'undefined' != typeof resultNode.length && 'undefined' == typeof resultNode.nodeType;
431         if (isArr && resultNode.length) {
432             for (var cnt = 0; cnt < resultNode.length; cnt++) {
433                 pushSubnode(resultNode[cnt]);
434             }
435         } else if (!isArr) {
436             pushSubnode(resultNode);
437         }
438 
439     }
440     ,
441 
442     /**
443      * replaces a current head theoretically,
444      * pratically only the scripts are evaled anew since nothing else
445      * can be changed.
446      *
447      * @param request the current request
448      * @param context the ajax context
449      * @param newData the data to be processed
450      *
451      * @return an xml representation of the page for further processing if possible
452      */
453     _replaceHead: function(request, context, newData) {
454 
455         var _Lang = this._Lang,
456                 _Dom = this._Dom,
457                 isWebkit = this._RT.browser.isWebKit,
458             //we have to work around an xml parsing bug in Webkit
459             //see https://issues.apache.org/jira/browse/MYFACES-3061
460                 doc = (!isWebkit) ? _Lang.parseXML(newData) : null,
461                 newHead = null;
462 
463         if (!isWebkit && _Lang.isXMLParseError(doc)) {
464             doc = _Lang.parseXML(newData.replace(/<!\-\-[\s\n]*<!\-\-/g, "<!--").replace(/\/\/-->[\s\n]*\/\/-->/g, "//-->"));
465         }
466 
467         if (isWebkit || _Lang.isXMLParseError(doc)) {
468             //the standard xml parser failed we retry with the stripper
469             var parser = new (this._RT.getGlobalConfig("updateParser", myfaces._impl._util._HtmlStripper))();
470             var headData = parser.parse(newData, "head");
471             //We cannot avoid it here, but we have reduced the parsing now down to the bare minimum
472             //for further processing
473             newHead = _Lang.parseXML("<head>" + headData + "</head>");
474             //last and slowest option create a new head element and let the browser
475             //do its slow job
476             if (_Lang.isXMLParseError(newHead)) {
477                 try {
478                     newHead = _Dom.createElement("head");
479                     newHead.innerHTML = headData;
480                 } catch (e) {
481                     //we give up no further fallbacks
482                     throw this._raiseError(new Error(),"Error head replacement failed reason:" + e.toString(),"_replaceHead");
483                 }
484             }
485         } else {
486             //parser worked we go on
487             newHead = doc.getElementsByTagName("head")[0];
488         }
489 
490         var oldTags = _Dom.findByTagNames(document.getElementsByTagName("head")[0], {"link": true, "style":true});
491         _Dom.runCss(newHead, true);
492         _Dom.deleteItems(oldTags);
493 
494         //var oldTags = _Dom.findByTagNames(document.getElementsByTagName("head")[0], {"script": true});
495         //_Dom.deleteScripts(oldTags);
496         _Dom.runScripts(newHead, true);
497 
498         return doc;
499     },
500 
501 
502     /**
503      * special method to handle the body dom manipulation,
504      * replacing the entire body does not work fully by simply adding a second body
505      * and by creating a range instead we have to work around that by dom creating a second
506      * body and then filling it properly!
507      *
508      * @param {Object} request our request object
509      * @param {Object} context (Map) the response context
510      * @param {String} newData the markup which replaces the old dom node!
511      * @param {Node} parsedData (optional) preparsed XML representation data of the current document
512      */
513     _replaceBody : function(request, context, newData /*varargs*/) {
514         var _RT = this._RT,
515                 _Dom = this._Dom,
516                 _Lang = this._Lang,
517 
518                 oldBody = document.getElementsByTagName("body")[0],
519                 placeHolder = document.createElement("div"),
520                 isWebkit = _RT.browser.isWebKit;
521 
522         placeHolder.id = "myfaces_bodyplaceholder";
523 
524         _Dom._removeChildNodes(oldBody);
525         oldBody.innerHTML = "";
526         oldBody.appendChild(placeHolder);
527 
528         var bodyData, doc = null, parser;
529 
530         //we have to work around an xml parsing bug in Webkit
531         //see https://issues.apache.org/jira/browse/MYFACES-3061
532         if (!isWebkit) {
533             doc = (arguments.length > 3) ? arguments[3] : _Lang.parseXML(newData);
534         }
535 
536         if (!isWebkit && _Lang.isXMLParseError(doc)) {
537             doc = _Lang.parseXML(newData.replace(/<!\-\-[\s\n]*<!\-\-/g, "<!--").replace(/\/\/-->[\s\n]*\/\/-->/g, "//-->"));
538         }
539 
540         if (isWebkit || _Lang.isXMLParseError(doc)) {
541             //the standard xml parser failed we retry with the stripper
542 
543             parser = new (_RT.getGlobalConfig("updateParser", myfaces._impl._util._HtmlStripper))();
544 
545             bodyData = parser.parse(newData, "body");
546         } else {
547             //parser worked we go on
548             var newBodyData = doc.getElementsByTagName("body")[0];
549 
550             //speedwise we serialize back into the code
551             //for code reduction, speedwise we will take a small hit
552             //there which we will clean up in the future, but for now
553             //this is ok, I guess, since replace body only is a small subcase
554             //bodyData = _Lang.serializeChilds(newBodyData);
555             var browser = _RT.browser;
556             if (!browser.isIEMobile || browser.isIEMobile >= 7) {
557                 //TODO check what is failing there
558                 for (var cnt = 0; cnt < newBodyData.attributes.length; cnt++) {
559                     var value = newBodyData.attributes[cnt].value;
560                     if (value)
561                         _Dom.setAttribute(oldBody, newBodyData.attributes[cnt].name, value);
562                 }
563             }
564         }
565         //we cannot serialize here, due to escape problems
566         //we must parse, this is somewhat unsafe but should be safe enough
567         parser = new (_RT.getGlobalConfig("updateParser", myfaces._impl._util._HtmlStripper))();
568         bodyData = parser.parse(newData, "body");
569 
570         var returnedElement = this.replaceHtmlItem(request, context, placeHolder, bodyData);
571 
572         if (returnedElement) {
573             this._pushOperationResult(context, returnedElement);
574         }
575         return returnedElement;
576     }
577     ,
578 
579     /**
580      * Replaces HTML elements through others and handle errors if the occur in the replacement part
581      *
582      * @param {Object} request (xhrRequest)
583      * @param {Object} context (Map)
584      * @param {Object} itemIdToReplace (String|Node) - ID of the element to replace
585      * @param {String} markup - the new tag
586      */
587     replaceHtmlItem : function(request, context, itemIdToReplace, markup) {
588         var _Lang = this._Lang, _Dom = this._Dom;
589 
590         var item = (!_Lang.isString(itemIdToReplace)) ? itemIdToReplace :
591                 _Dom.byIdOrName(itemIdToReplace);
592 
593         if (!item) {
594             throw this._raiseError(_Lang.getMessage("ERR_ITEM_ID_NOTFOUND", null, "_AjaxResponse.replaceHtmlItem", (itemIdToReplace) ? itemIdToReplace.toString() : "undefined"));
595         }
596         return _Dom.outerHTML(item, markup);
597     },
598 
599     /**
600      * xml insert command handler
601      *
602      * @param request the ajax request element
603      * @param context the context element holding the data
604      * @param node the xml node holding the insert data
605      * @return true upon successful completion, false otherwise
606      *
607      **/
608     processInsert: function(request, context, node) {
609         /*remapping global namespaces for speed and readability reasons*/
610         var _Dom = this._Dom,
611                 _Lang = this._Lang,
612             //determine which path to go:
613                 insertData = this._parseInsertData(request, context, node);
614 
615         if (!insertData) return false;
616 
617         var opNode = _Dom.byIdOrName(insertData.opId);
618         if (!opNode) {
619             throw this._raiseError(new Error(),_Lang.getMessage("ERR_PPR_INSERTBEFID_1", null, "_AjaxResponse.processInsert", insertData.opId),"processInsert");
620         }
621 
622         //call insertBefore or insertAfter in our dom routines
623         var replacementFragment = _Dom[insertData.insertType](opNode, insertData.cDataBlock);
624         if (replacementFragment) {
625             this._pushOperationResult(context, replacementFragment);
626         }
627         return true;
628     },
629 
630     /**
631      * determines the corner data from the insert tag parsing process
632      *
633      *
634      * @param request request
635      * @param context context
636      * @param node the current node pointing to the insert tag
637      * @return false if the parsing failed, otherwise a map with follwing attributes
638      * <ul>
639      *     <li>inserType - a ponter to a constant which maps the direct function name for the insert operation </li>
640      *     <li>opId - the before or after id </li>
641      *     <li>cDataBlock - the html cdata block which needs replacement </li>
642      * </ul>
643      *
644      * TODO we have to find a mechanism to replace the direct sendError calls with a javascript exception
645      * which we then can use for cleaner error code handling
646      */
647     _parseInsertData: function(request, context, node) {
648         var _Lang = this._Lang,
649                 _Dom = this._Dom,
650                 concatCDATA = _Dom.concatCDATABlocks,
651 
652                 INSERT_TYPE_BEFORE = "insertBefore",
653                 INSERT_TYPE_AFTER = "insertAfter",
654 
655                 id = node.getAttribute("id"),
656                 beforeId = node.getAttribute("before"),
657                 afterId = node.getAttribute("after"),
658                 ret = {};
659 
660         //now we have to make a distinction between two different parsing paths
661         //due to a spec malalignment
662         //a <insert id="... beforeId|AfterId ="...
663         //b <insert><before id="..., <insert> <after id="....
664         //see https://issues.apache.org/jira/browse/MYFACES-3318
665         //simple id, case1
666         if (id && beforeId && !afterId) {
667             ret.insertType = INSERT_TYPE_BEFORE;
668             ret.opId = beforeId;
669             ret.cDataBlock = concatCDATA(node);
670 
671             //<insert id=".. afterId="..
672         } else if (id && !beforeId && afterId) {
673             ret.insertType = INSERT_TYPE_AFTER;
674             ret.opId = afterId;
675             ret.cDataBlock = concatCDATA(node);
676 
677             //<insert><before id="... <insert><after id="...
678         } else if (!id) {
679             var opType = node.childNodes[0].tagName;
680 
681             if (opType != "before" && opType != "after") {
682                 throw this._raiseError(new Error(),_Lang.getMessage("ERR_PPR_INSERTBEFID"),"_parseInsertData");
683             }
684             opType = opType.toLowerCase();
685             var beforeAfterId = node.childNodes[0].getAttribute("id");
686             ret.insertType = (opType == "before") ? INSERT_TYPE_BEFORE : INSERT_TYPE_AFTER;
687             ret.opId = beforeAfterId;
688             ret.cDataBlock = concatCDATA(node.childNodes[0]);
689         } else {
690             throw this._raiseError(new Error(),[_Lang.getMessage("ERR_PPR_IDREQ"),
691                                     "\n ",
692                                     _Lang.getMessage("ERR_PPR_INSERTBEFID")].join(""),"_parseInsertData");
693         }
694         ret.opId = _Lang.trim(ret.opId);
695         return ret;
696     },
697 
698     processDelete : function(request, context, node) {
699 
700         var _Lang = this._Lang,
701                 _Dom = this._Dom,
702                 deleteId = node.getAttribute('id');
703 
704         if (!deleteId) {
705             throw this._raiseError(new Error(),_Lang.getMessage("ERR_PPR_UNKNOWNCID", null, "_AjaxResponse.processDelete", ""),"processDelete");
706         }
707 
708         var item = _Dom.byIdOrName(deleteId);
709         if (!item) {
710             throw this._raiseError(new Error(),_Lang.getMessage("ERR_PPR_UNKNOWNCID", null, "_AjaxResponse.processDelete", deleteId),"processDelete");
711         }
712 
713         var parentForm = this._Dom.getParent(item, "form");
714         if (null != parentForm) {
715             context._mfInternal._updateForms.push(parentForm);
716         }
717         _Dom.deleteItem(item);
718 
719         return true;
720     }
721     ,
722 
723     processAttributes : function(request, context, node) {
724         //we now route into our attributes function to bypass
725         //IE quirks mode incompatibilities to the biggest possible extent
726         //most browsers just have to do a setAttributes but IE
727         //behaves as usual not like the official standard
728         //myfaces._impl._util.this._Dom.setAttribute(domNode, attribute, value;
729 
730         var _Lang = this._Lang,
731             //<attributes id="id of element"> <attribute name="attribute name" value="attribute value" />* </attributes>
732                 elemId = node.getAttribute('id');
733 
734         if (!elemId) {
735             throw this._raiseError(new Error(),"Error in attributes, id not in xml markup","processAttributes");
736         }
737         var childNodes = node.childNodes;
738 
739         if (!childNodes) {
740             return false;
741         }
742         for (var loop2 = 0; loop2 < childNodes.length; loop2++) {
743             var attributesNode = childNodes[loop2],
744                     attrName = attributesNode.getAttribute("name"),
745                     attrValue = attributesNode.getAttribute("value");
746 
747             if (!attrName) {
748                 continue;
749             }
750 
751             attrName = _Lang.trim(attrName);
752             /*no value means reset*/
753             //value can be of boolean value hence full check
754             if ('undefined' == typeof attrValue || null == attrValue) {
755                 attrValue = "";
756             }
757 
758             switch (elemId) {
759                 case this.P_VIEWROOT:
760                     throw  this._raiseError(new Error(),_Lang.getMessage("ERR_NO_VIEWROOTATTR", null, "_AjaxResponse.processAttributes"),"processAttributes");
761 
762                 case this.P_VIEWHEAD:
763                     throw  this._raiseError(new Error(),_Lang.getMessage("ERR_NO_HEADATTR", null, "_AjaxResponse.processAttributes"),"processAttributes");
764 
765                 case this.P_VIEWBODY:
766                     var element = document.getElementsByTagName("body")[0];
767                     this._Dom.setAttribute(element, attrName, attrValue);
768                     break;
769 
770                 default:
771                     this._Dom.setAttribute(document.getElementById(elemId), attrName, attrValue);
772                     break;
773             }
774         }
775         return true;
776     },
777 
778     /**
779      * internal helper which raises an error in the
780      * format we need for further processing
781      *
782      * @param message the message
783      * @param title the title of the error (optional)
784      * @param name the name of the error (optional)
785      */
786     _raiseError: function(error, message,  caller, title, name) {
787         var _Impl = this.attr("impl");
788         var finalTitle = title || _Impl.MALFORMEDXML;
789         var finalName = name || _Impl.MALFORMEDXML;
790         var finalMessage = message || "";
791 
792         return this._Lang.makeException(error, finalTitle, finalName, this._nameSpace, caller || ( (arguments.caller) ? arguments.caller.toString() : "_raiseError"), finalMessage);
793     }
794 });
795