source: main/trunk/greenstone3/web/interfaces/default/js/documentedit_scripts_util.js@ 32873

/** Javascript file containing useful functions used by both documentedit_scripts.js and documentmaker_scripts.js */


//Some "constants" to match the server constants
var SUCCESS = 1;
var ACCEPTED = 2;
var ERROR = 3;
var CONTINUING = 10;
var COMPLETED = 11;
var HALTED = 12;

var _transactions = new Array();
var _collectionsToBuild = new Array();
var _allContents = new Array();
var _deletedSections = new Array();
var _deletedMetadata = new Array();
var _undoOperations = new Array();
var _baseURL;
var _statusBar;
var _metadataSetList = new Array();


// We need to wait for all editable elements (metadataTable and sectionText) to be finished with initialising
// before we try to store their current states in the editableInitStates array
// To do this, we need to keep track of how many elements still require initialising.
var editableElementsInitialisationProgress = 0;

    

function encodeDelimiters(meta_value) {

    var new_value = meta_value.replace(/;/g, "%253B");
    return new_value.replace(/&/g, "%2526");
}    

function getElementsByClassName(cl, parent) 
{
    var elemArray = [];
    var classRegEx = new RegExp("\\b" + cl + "\\b");
    var elems;
    if(parent)
    {   
        elems = parent.getElementsByTagName("*");
    }
    else
    {
        elems = document.getElementsByTagName("*");
    }
    
    for (var i = 0; i < elems.length; i++) 
    {
        var classeName = elems[i].className;
        if (classRegEx.test(classeName)) elemArray.push(elems[i]);
    }
    
    return elemArray;
};

function getNextSiblingOfType(elem, type)
{
    if(elem == null)
    {
        return null;
    }
    
    var current = elem.nextSibling;
    while(current != null)
    {
        if(current.nodeName.toLowerCase() == type)
        {
            return current;
        }
        
        current = current.nextSibling;
    }
    return null;
}

function getPrevSiblingOfType(elem, type)
{
    if(elem == null)
    {
        return null;
    }
    
    var current = elem.previousSibling;
    while(current != null)
    {
        if(current.nodeName.toLowerCase() == type)
        {
            return current;
        }
        
        current = current.previousSibling;
    }
    return null;
}

function saveTransaction(transaction)
{
    console.log(transaction);
    _transactions.push(transaction);
}

function undo()
{
    if(_undoOperations.length == 0)
    {
        return;
    }
    
    var undoOp = _undoOperations.pop();

    //Create/Duplicate undo
    if(undoOp.op == "del")
    {
        if(undoOp.srcElem.childList)
        {
            removeFromParent(undoOp.srcElem.childList);
        }
        if(undoOp.srcElem.parentItem)
        {
            undoOp.srcElem.parentItem.menu.newSectionLink.style.display = "inline";
            undoOp.srcElem.parentItem.childList = null;
        }
        removeFromParent(undoOp.srcElem);
    }
    
    if(undoOp.op == "delMeta")
    {
        if(undoOp.srcElem.childList)
        {
            removeFromParent(undoOp.srcElem.childList);
        }
        if(undoOp.srcElem.parentItem)
        {
            undoOp.srcElem.parentItem.menu.newSectionLink.style.display = "inline";
            undoOp.srcElem.parentItem.childList = null;
        }
        de.doc.unregisterEditSection(undoOp.srcElem);
        removeFromParent(undoOp.srcElem);
    }
    
    //Move undo (mva is move after, mvb is move before, mvi is move into)
    else if(undoOp.op == "mva" || undoOp.op == "mvb" || undoOp.op == "mvi")
    {
        if(undoOp.op == "mvb")
        {
            undoOp.refElem.parentNode.insertBefore(undoOp.srcElem, undoOp.refElem);
        }
        else if(undoOp.op == "mva")
        {
            insertAfter(undoOp.srcElem, undoOp.refElem);
        }
        else
        {
            undoOp.refElem.removeChild(undoOp.refElem.firstChild);
            undoOp.refElem.appendChild(undoOp.srcElem);
        }

        if(undoOp.srcElem.textDiv)
        {
            insertAfter(undoOp.srcElem.textDiv, undoOp.srcElem);
        }
        if(undoOp.srcElem.childList)
        {
            insertAfter(undoOp.srcElem.childList, undoOp.srcElem.textDiv);
        }

        if(undoOp.srcElem.onmouseout)
        {
            //Uncolour the section if it coloured
            undoOp.srcElem.onmouseout();
        }
        updateFromTop();
    }
    else if(undoOp.op == "display")
    {
        undoOp.srcElem.style.display = undoOp.subOp;
    }
    
    if(undoOp.removeDeletedMetadata)
    {
        _deletedMetadata.pop();
    }

    if(undoOp.removeTransaction)
    {
        _transactions.pop();
    }
}

function enableSaveButtons(enabled) {
  if (enabled) {
    $("#saveButton, #quickSaveButton").html(gs.text.de.save_changes);
    $("#saveButton, #quickSaveButton").removeAttr("disabled");

  } else {
    $("#saveButton, #quickSaveButton").html(gs.text.de.saving + "...");
    $("#saveButton, #quickSaveButton").attr("disabled", "disabled");
   
  }
}
function addCollectionToBuild(collection)
{
    for(var i = 0; i < _collectionsToBuild.length; i++)
    {
        if(collection == _collectionsToBuild[i])
        {
            return;
        }
    }
    _collectionsToBuild.push(collection);
}

function save() {
  saveAndRebuild(false);
}

function rebuildCurrentCollection() {

  console.log(gs.text.de.rebuilding_collection);
  enableSaveButtons(false);
  var collection = gs.cgiParams.c;

  var collectionsArray = new Array();
  collectionsArray.push(collection);
  buildCollections(collectionsArray, null, reloadUponRebuild); // passing in callback to reload the page after build, as requested by Kathy
}


function reloadUponRebuild() {
   // finished rebuilding - reload the page after rebuild, but first
   // clear transactions array of saved changes, now that we're done processing these changes during rebuild,
   // since we don't want the "are you sure to leave page" popup which appears on _transactions array being non-empty
    _transactions = null;    
    location.reload(true); // force reload, not from cache, https://www.w3schools.com/jsref/met_loc_reload.asp 
}

/************************************
*    TEXT EDIT (CKEDITOR) SCRIPTS    *
**************************************/

//  not using this anymore as the instanceready never seems to get called 
function addCKEEditableState(evt,stateArray) 
{
    // Event->Editor->CKE DOM Inline Element that editor was for->underlying jquery element 
    element = evt.editor.element.$;
    nodeText = element.innerHTML;
         stateArray.push({
             editableNode : element,
             initHTML : nodeText
         });
}

function addEditableState(editable,stateArray)
{

    if(editable.tagName == 'TEXTAREA')
    {
        nodeText = editable.value;
    }
    else 
    {
        nodeText = editable.innerHTML;
    }

        stateArray.push({
                editableNode : editable,
                initHTML : nodeText
        });

}

function getLastEditableStates()
{   
    editableLastStates = [];
        $(".sectionText").each(function(){addEditableState(this,editableLastStates);});
        $(".metaTableCellArea").each(function(){addEditableState(this,editableLastStates);});

}

function changesToUpdate() 
{
    var resultArray = new Array();
    
    //console.log("**** changesToUpdate::editableElementsInitialisationProgress = " + editableElementsInitialisationProgress);
    
    // Only want to check for valid edited states if the editableInitStates has been fully set up:
    // We don't bother if editableInitStates is not ready:
    // if editableInitStates array has nothing in it (which means CKEditor is not ready)
    // OR if some of the editable elements (metadataTable OR ckeditor editable values) still need to be initialised/initialising is only partway through 
    if ((editableInitStates.length > 0) && (editableElementsInitialisationProgress == 0)) {
        getLastEditableStates();
        for (var j in editableLastStates) 
        {   
            if (isNodeChanged(editableLastStates[j])) 
            {
                resultArray.push(editableLastStates[j].editableNode);
            }
        }
    }
    return resultArray;
}


function isNodeChanged(StateToCheck){
    for (var i in editableInitStates) 
    {
        if ((StateToCheck.editableNode === editableInitStates[i].editableNode)) {
        if ( StateToCheck.initHTML === editableInitStates[i].initHTML ) 
        {
            return false;
        }
            //console.log("current="+StateToCheck.initHTML);
            //console.log("init="+editableInitStates[i].initHTML);
        return true;
        }
    
    }
    // if get here, this must be a new node, as wasn't in init states
    // make sure its not empty - we won't add empty nodes.
    if (StateToCheck.initHTML == "") {
    return false;
    }

    console.log("**** isNodeChanged() editableInitStates = ", editableInitStates);
    return true;
    
}


function saveAndRebuild(rebuild) 
{
//This works in most cases but will not work when taking a doc from one collection to another, will need to be fixed at some point
  var collection;
  if(gs.cgiParams.c && gs.cgiParams.c != "") {
    
    collection = gs.cgiParams.c;
  }
  else {
    collection = gs.cgiParams.p_c;
  }
  
    var sendBuildRequest = function()
    {
        console.log("Replacing init states with current states");
        // Clean changes. We're here because setting meta for all meta changes was successful, so
        // - update doc's metadata initial states to current:
        editableInitStates = editableLastStates;        
        // - update doc's map editors' initial states to current:
        var map_editors_array = Object.values(gsmap_store);
        for(var i = 0; i < map_editors_array.length; i++) {
            var map_editor = map_editors_array[i];
            map_editor.savedOverlays = JSON.stringify(ShapesUtil.overlayToJSON(map_editor.overlays));
        }
        
        
        var request = "[";
        for(var i = 0; i < _transactions.length; i++)
        {
            request += _transactions[i];
            if(i != _transactions.length - 1)
            {
                request += ",";
            }
        }
        request += "]";

        var statusID;
        var ajax = new gs.functions.ajaxRequest();
        ajax.open("POST", gs.xsltParams.library_name, true);
        ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");
        ajax.onreadystatechange = function()
        {
            if(ajax.readyState == 4 && ajax.status == 200)
            {
                var text = ajax.responseText;
                var xml = validateXML(text);
                
                var errorElems;
                if(!xml || checkForErrors(xml))
                {
                    alert(gs.text.dse.error_saving);
                
                    enableSaveButtons(true);
                    
                    if(_statusBar)
                    {
                        _statusBar.removeStatus(statusID);
                    }
                    return;
                }

                if(_statusBar)
                {
                    _statusBar.removeStatus(statusID);
                }
                if (rebuild) {
                    buildCollections(_collectionsToBuild, null, reloadUponRebuild);
                } else {
                  // reset the save button here
                    enableSaveButtons(true);
                    // saving to archives is now done, clear the transactions
                    // that were keeping track of the full text changes that have now
                    // been performed to archives (no member var keeps track of meta changes, only a local var)
                    _transactions = new Array();
                }
            }
        }

        if(_collectionsToBuild.length > 0)
        {
          enableSaveButtons(false);

            if(_statusBar)
            {
                statusID = _statusBar.addStatus(gs.text.dse.modifying_archives + "...");
            }
            ajax.send("a=g&rt=r&s=DocumentExecuteTransaction&s1.transactions=" + request);
        }
    } // end sendBuildRequest definition

  var metadataChanges = new Array();
  if (_deletedMetadata.length > 0) {
    //addCollectionToBuild(collection);

    for(var i = 0; i < _deletedMetadata.length; i++) {
      
      var currentRow = _deletedMetadata[i];
      
      //Get document ID
      var currentElem = currentRow;
      while((currentElem = currentElem.parentNode).tagName != "TABLE");
      var docID = currentElem.getAttribute("id").substring(4);
      
      //Get metadata name
      var cells = currentRow.getElementsByTagName("TD");
    var nameCell = cells[0];
    // metadata name cell might have the multivalue indicator in it, so just want the first word
    var name = nameCell.innerHTML.split(" ")[0];
      var valueCell = cells[1];
    var value = valueCell.getElementsByTagName("TEXTAREA")[0].value;
    if (value.length) {
        // check for non empty value, in case all they have done is add a field then deleted it.
        metadataChanges.push({type:'delete', docID:docID, name:name, value:value});
        addCollectionToBuild(collection);
    }
      removeFromParent(currentRow);
    }
  }

  var changes = changesToUpdate();
  
  //Clean changes
  ////editableInitStates = editableLastStates; // moved into processChangesLoop(): when all changes have successfully been processed.
        // Alternative is to set initState per metadata in changes array: after each setArchiveMetadata call for each individual meta change.
        // But since our setMeta calls are always synchronous, happening in sequence, if one setArchivesMeta() call fails
        // we'll not attempt subsequent ones or coll building at the end.
  
    for(var i = 0; i < changes.length; i++)
    {
        var changedElem = changes[i];
        //Save metadata
        
        if(gs.functions.hasClass(changedElem, "metaTableCellArea")) 
        {
            //Get document ID
            var currentElem = changedElem;
            while((currentElem = currentElem.parentNode).tagName != "TABLE");
            var docID = currentElem.getAttribute("id").substring(4);
            
            //Get metadata name
            var row = changedElem.parentNode.parentNode;
            var cells = row.getElementsByTagName("TD");
            var nameCell = cells[0];
            // metadata name cell might have the multivalue indicator in it, so just want the first word
            var name = nameCell.innerHTML.split(" ")[0];
            var value = changedElem.value;
            value = value.replace(/&nbsp;/g, " ");

            var orig = changedElem.originalValue;
            if (orig) {
              orig = orig.replace(/&nbsp;/g, " ");
            }
            if (jQuery.inArray(name, multiValuedMetadata) != -1) {

            // split the values
            var values_list = value.split(mvm_delimiter);
            var orig_list;
            var num_orig;
            if (orig) {
                orig_list = orig.split(mvm_delimiter);
                num_orig = orig_list.length;
            }

            for(var i = 0; i < values_list.length; i++) {
                var val = values_list[i];
                var ori =null;
                if (orig && i<num_orig) {
                    ori = orig_list[i];
                }
                metadataChanges.push({collection:collection, docID:docID, name:name, value:val, orig:ori});
            }
            } else {
            metadataChanges.push({collection:collection, docID:docID, name:name, value:value, orig:orig});
            }
            changedElem.originalValue = changedElem.value;
            addCollectionToBuild(collection);
        }
        //Save content
        else if(gs.functions.hasClass(changedElem, "renderedText"))
        {
            var section = changedElem.parentDiv.parentItem;
            saveTransaction('{"operation":"setText", "text":"' + CKEDITOR.instances[changedElem.getAttribute("id")].getData().replace(/%/g, "%25").replace(/"/g, "\\\"").replace(/&/g, "%26") + '", "collection":"' + section.collection + '", "oid":"' + section.nodeID + '"}'); //'
            addCollectionToBuild(section.collection);
        }
        else if(gs.functions.hasClass(changedElem, "sectionText"))
        {
            var id = changedElem.getAttribute("id");
            var sectionID = id.substring(4);
            saveTransaction('{"operation":"setText", "text":"' + CKEDITOR.instances[changedElem.getAttribute("id")].getData().replace(/%/g, "%25").replace(/"/g, "\\\"").replace(/&/g, "%26") + '", "collection":"' + gs.cgiParams.c + '", "oid":"' + sectionID + '"}'); //'
            addCollectionToBuild(gs.cgiParams.c);
        }
    }

    // Check for changes to any map editors in the document
    // NOTE: At present, we don't maintain a list of deletions for the map editor:
    // GPS.mapOverlay data that has been removed is recorded as a change not a deletion,
    // with the metadata's new value being the string of an empty JSON array, [],
    // and entered as such into doc.xml.
    var modified_map_editors_data = getDocMapsEditDataForSaving(gs.cgiParams.c); // collection  
    for(var i = 0; i < modified_map_editors_data.length; i++) {     
        metadataChanges.push(modified_map_editors_data[i]); // of the form { collection: gs.cgiParams.c, docID: nodeID, name:"GSP.mapOverlay", metapos: 0, value: <stringifiedJSON> }
        addCollectionToBuild(gs.cgiParams.c); // collection
    }

    
    
    var processChangesLoop = function(index)
    {
        var change = metadataChanges[index];
                
        var callbackFunction;
        if(index + 1 == metadataChanges.length)
        {
            callbackFunction = sendBuildRequest;
        }
        else
        {
            callbackFunction = function(){processChangesLoop(index + 1)};
        }
        if (change.type == "delete") {
            gs.functions.removeArchivesMetadata(collection, gs.xsltParams.site_name, change.docID, change.name, null, encodeDelimiters(change.value), function(){callbackFunction();});
        } else {
          // Checking "if(change.metapos)" doesn't work for us as it becomes false when the property doesn't exist AND when the property is 0. But metapos IS 0 for us.
          // https://ultimatecourses.com/blog/methods-to-determine-if-an-object-has-a-given-property
          if('metapos' in change && change.metapos === 0) {// && change.metapos === 0) { // for maps
                
                // collection, site, documentID, metadataName, metadataPosition, metadataValue, prevMetadataValue, metamode, responseFunction               
                //console.log("@@@ metapos! change: ", change);
                gs.functions.setArchivesMetadata(change.collection, gs.xsltParams.site_name, change.docID, change.name, change.metapos, encodeDelimiters(change.value), null, "override", function(){callbackFunction();});
            }
          else if(change.orig)
            {
            gs.functions.setArchivesMetadata(change.collection, gs.xsltParams.site_name, change.docID, change.name, null, encodeDelimiters(change.value), encodeDelimiters(change.orig), "override", function(){callbackFunction();});
            }
          else
            {
            gs.functions.setArchivesMetadata(change.collection, gs.xsltParams.site_name, change.docID, change.name, null, encodeDelimiters(change.value), null, "accumulate", function(){callbackFunction();});
            }
        }
    }
    if (metadataChanges.length>0) {
      // this will process each change one by one, and then send the build request
      processChangesLoop(0);
    }
    else if(_collectionsToBuild.length > 0) {
      // if there are no metadata changes, but some other changes eg text have happened, then we need to send the build request.
      sendBuildRequest();
    }
      
    /* need to clear the changes from the page so that we don't process them again next time */
    while (_deletedMetadata.length>0) {
      _deletedMetadata.pop();
    }

}


function buildCollections(collections, documents, callback)
{
    if(!collections || collections.length == 0)
    {
        console.log(gs.text.dse.empty_collection_list);
        enableSaveButtons(true);
        return;
    }
    
    var docs = "";
    var buildOperation = "";
    if(documents)
    {
        buildOperation = "ImportCollection";
        docs += "&s1.documents=";
        for(var i = 0; i < documents.length; i++)
        {
            docs += documents[i];
            if(i < documents.length - 1)
            {           
                docs += ",";
            }
        }
    }
    else
    {
        buildOperation = "BuildAndActivateCollection";
    }

    var counter = 0;
    var statusID = 0;
    var buildFunction = function()
    {
        var ajax = new gs.functions.ajaxRequest();
        ajax.open("GET", gs.xsltParams.library_name + "?a=g&rt=r&ro=1&s=" + buildOperation + "&s1.incremental=true&s1.collection=" + collections[counter] + docs);
        ajax.onreadystatechange = function()
        {
            if(ajax.readyState == 4 && ajax.status == 200)
            {
                var text = ajax.responseText;
                var xml = validateXML(text);

                if(!xml || checkForErrors(xml))
                {
                    alert(gs.text.dse.could_not_build_p1 + " " + collections[counter] + gs.text.dse.could_not_build_p2);
                    
                    if(_statusBar)
                    {
                        _statusBar.removeStatus(statusID);
                    }
                    enableSaveButtons(true);
                    
                    return;
                }

                var status = xml.getElementsByTagName("status")[0];
                var pid = status.getAttribute("pid");

                startCheckLoop(pid, buildOperation, statusID, function()
                {
                    /*
                    var localAjax = new gs.functions.ajaxRequest();
                    localAjax.open("GET", gs.xsltParams.library_name + "?a=g&rt=r&ro=1&s=ActivateCollection&s1.collection=" + collections[counter], true);
                    localAjax.onreadystatechange = function()
                    {
                        if(localAjax.readyState == 4 && localAjax.status == 200)
                        {
                            var localText = localAjax.responseText;
                            var localXML = validateXML(localText);
                            
                            if(!xml || checkForErrors(xml))
                            {
                                alert(gs.text.dse.could_not_activate_p1 + " " + collections[counter] + gs.text.dse.could_not_activate_p2);
                                
                                if(_statusBar)
                                {
                                    _statusBar.removeStatus(statusID);
                                }
                                enableSaveButtons(true);
                                
                                return;
                            }

                            var localStatus = localXML.getElementsByTagName("status")[0];
                            if(localStatus)
                            {
                                var localPID = localStatus.getAttribute("pid");
                                startCheckLoop(localPID, "ActivateCollection", statusID, function()
                                {
                                */
                                    if(counter == collections.length - 1)
                                    {
                                        removeCollectionsFromBuildList(collections);
                                        if(callback)
                                        {
                                            callback();
                                        }
                                    }
                                    else
                                    {
                                        counter++;
                                        buildFunction();
                                    }

                                    _transactions = new Array();

                                    if(_statusBar)
                                    {
                                        _statusBar.removeStatus(statusID);
                                    }
                                    enableSaveButtons(true);
                                /*
                                });
                            }
                        }
                    }
                    if(_statusBar)
                    {
                        _statusBar.changeStatus(statusID, gs.text.dse.activating + " " + collections[counter] + "...");
                    }
                    localAjax.send();
                    */
                });
            }
        }
        if(_statusBar)
        {
            statusID = _statusBar.addStatus(gs.text.dse.building + " " + collections[counter] + "...");
        }
        ajax.send();
    }
    buildFunction();
}

function startCheckLoop(pid, serverFunction, statusID, callbackFunction)
{
    var ajaxFunction = function()
    {
        var ajax = new gs.functions.ajaxRequest();
        ajax.open("GET", gs.xsltParams.library_name + "?a=g&rt=s&ro=1&s=" + serverFunction + "&s1.pid=" + pid, true);
        ajax.onreadystatechange = function()
        {
            if(ajax.readyState == 4 && ajax.status == 200)
            {
                var text = ajax.responseText;
                var xml = validateXML(text);
                
                if(!xml || checkForErrors(xml))
                {
                    alert(gs.text.dse.could_not_check_status_p1 + " " + serverFunction + gs.text.dse.could_not_check_status_p2a);
                    
                    if(_statusBar)
                    {
                        _statusBar.removeStatus(statusID);
                    }
                    enableSaveButtons(true);
                    
                    return;
                }

                var status = xml.getElementsByTagName("status")[0];
                var code = status.getAttribute("code");

                if (code == COMPLETED || code == SUCCESS)
                {
                    callbackFunction();
                }
                else if (code == HALTED || code == ERROR)
                {
                    alert(gs.text.dse.could_not_check_status_p1 + " " + serverFunction + gs.text.dse.could_not_check_status_p2b);
                    
                    if(_statusBar)
                    {
                        _statusBar.removeStatus(statusID);
                    }
                    enableSaveButtons(true);
                }
                else
                {
                    setTimeout(ajaxFunction, 1000);
                }
            }
        }
        ajax.send();
    }
    ajaxFunction();
}

function removeCollectionsFromBuildList(collections)
{
    var tempArray = new Array();
    for(var i = 0; i < _collectionsToBuild.length; i++)
    {
        var found = false;
        for(var j = 0; j < collections.length; j++)
        {
            if(collections[j] == _collectionsToBuild[i])
            {
                found = true;
                break;
            }
        }
        
        if(!found)
        {
            tempArray.push(_collectionsToBuild[i]);
        }
    }
    _collectionsToBuild = tempArray;
}

function checkForErrors(xml)
{
    var errorElems = xml.getElementsByTagName("error");
    
    if(errorElems && errorElems.length > 0)
    {
        var errorString = gs.text.dse.error_saving_changes + ": ";
        for(var i = 0; i < errorElems.length; i++)
        {
            errorString += " " + errorElems.item(i).firstChild.nodeValue;
        }
        alert(errorString);
        return true;
    }
    return false; //No errors
}

function validateXML(txt)
{
    // code for IE
    if (window.ActiveXObject)
    {
        var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.loadXML(document.all(txt).value);

        if(xmlDoc.parseError.errorCode!=0)
        {
            txt = dse.error_code + ": " + xmlDoc.parseError.errorCode + "\n";
            txt = txt + dse.error_reason + ": " + xmlDoc.parseError.reason;
            txt = txt + dse.error_line + ": " + xmlDoc.parseError.line;
            console.log(txt);
            return null;
        }
        
        return xmlDoc;
    }
    // code for Mozilla, Firefox, Opera, etc.
    else if (document.implementation.createDocument)
    {
        var parser = new DOMParser();
        var xmlDoc = parser.parseFromString(txt,"text/xml");

        if (xmlDoc.getElementsByTagName("parsererror").length > 0)
        {
            console.log(gs.text.dse.xml_error);
            return null;
        }
        
        return xmlDoc;
    }
    else
    {
        console.log(gs.text.dse.browse_cannot_validate_xml);
    }
    return null;
}

function onVisibleMetadataSetChange()
{
    var metadataList = document.getElementById("metadataSetList");
    var index = metadataList.selectedIndex;
    var options = metadataList.getElementsByTagName("OPTION");
    var selectedOption = options[index];
    
    var selectedSet = selectedOption.value;
    changeVisibleMetadata(selectedSet);
}

function changeVisibleMetadata(metadataSetName)
{
        var metaSetList = metadataSetName.split(",");
    var tables = document.getElementsByTagName("TABLE");
    for(var i = 0; i < tables.length; i++)
    {
        var id = tables[i].getAttribute("id");
        if(id && id.search(/^meta/) != -1)
        {
            var rows = tables[i].getElementsByTagName("TR");
            for(var j = 0; j < rows.length; j++)
            {
                if(metadataSetName == "All")
                {
                    rows[j].style.display = "table-row";
                }
                else
                {
                    var cells = rows[j].getElementsByTagName("TD");
                    // metadata name cell might have the multivalue indicator in it, so just want the first word
                    var cellName = cells[0].innerHTML.split(" ")[0];
                    
                    if(cellName.indexOf(".") == -1)
                    {
                        rows[j].style.display = "none";
                    }
                    else
                    {
                        var setName = cellName.substring(0, cellName.lastIndexOf("."));
                        if (metaSetList.indexOf(setName)!= -1) 
                        {
                            rows[j].style.display = "table-row";
                        }
                        else
                        {
                            rows[j].style.display = "none";
                        }
                    }
                }
            }
        }
    }
}

function asyncRegisterEditSection(cell)
{
    //This registering can cause a sizeable delay so we'll thread it (effectively) so the browser is not paused
    cell.originalValue = cell.value;
    setTimeout(function(){
        addEditableState(cell, editableInitStates);
        // finished initialising one more editable element,
        // so decrement the counter keeping track of how many elements still need initialising
        editableElementsInitialisationProgress--;
    },0);
}

function addOptionToList(list, optionvalue, optiontext, selected) {
  var newOption = $("<option>");
  if (optiontext) {
    newOption.html(optiontext);
    newOption.attr("value", optionvalue);
  } else {
    newOption.html(optionvalue);
  }
  if (selected) {
    newOption.attr("selected", true);
  }
  list.append(newOption);
}

/* returns either an input or a select element. Data based on 
   availableMetadataElements var. */
function createMetadataElementSelector() {
  var metaNameField;
  if (new_metadata_field_input_type == "fixedlist") {
    metaNameField =  $("<select>", {"class": "ui-state-default"});
    for(var i=0; i<availableMetadataElements.length; i++) {
      addOptionToList(metaNameField, availableMetadataElements[i]);
    }
    return metaNameField;
  }
  metaNameField = $("<input>", {"type": "text","style":"margin: 5px; border: 1px solid #000;"}); 
  if (new_metadata_field_input_type == "autocomplete") {
    metaNameField.autocomplete({
    minLength: 0,
      source: availableMetadataElements
      });
      metaNameField.attr("title", gs.text.de.enter_meta_dropdwon); //"Enter a metadata name, or use the down arrow to select one, then click 'Add New Metadata'");
  } else {
      metaNameField.attr("title", gs.text.de.enter_meta_name); //"Enter a metadata name, then click 'Add New Metadata'");
  }
  
  return metaNameField;
}

function addFunctionalityToTable(table)
{
    var $tr_array = table.find("tr");   

    
    // We need to keep track of editableElementsInitialisationProgress: the number of editable elements that still need to be initialised/need to finish initialising
    // Each table's rows means *that* many more editable elements still need initialising.
    // So each time addFunctionalityToTable() is called on a table, we must increment our counter editableElementsInitialisationProgress
    // with how many editable cells it has/how many rows it has.
    editableElementsInitialisationProgress += $tr_array.length;
    
    $tr_array.each(function()
    {
        var cells = $(this).find("td");
        var metadataName = $(cells[0]).html();

        if(dynamic_metadata_set_list == true && metadataName.indexOf(".") != -1)
        {
            var metadataSetName = metadataName.substring(0, metadataName.lastIndexOf("."));
            
            var found = false;
            for(var j = 0; j < _metadataSetList.length; j++)
            {
                if(metadataSetName == _metadataSetList[j])
                {
                    found = true;
                    break;
                }
            }
            
            if(!found)
            {
                _metadataSetList.push(metadataSetName);
                addOptionToList( $("#metadataSetList"), metadataSetName);
            }
        }
            
        asyncRegisterEditSection(cells[1].getElementsByTagName("textarea")[0]);
        addRemoveLinkToRow(this);

        // add multivalued indicator if needed
         if (jQuery.inArray(metadataName, multiValuedMetadata) != -1) {
        //if (multiValuedMetadata.includes(metadataName)){
        $(cells[0]).html(metadataName + " <span title='"+gs.text.de.multi_valued_tooltip + "' style='float:right;'>"+mvm_delimiter+"</span>"); //Multi-valued metadata. Separate values with semi-colon ;
        }
        
    });

    // set up autocomplete values
    var value_cells = $(".metaTableCellArea");
    for (var k=0; k<autocompleteMetadata.length; k++) {
    var source_name = autocompleteMetadata[k].replace(/[\.-]/g, "");
    var source_obj = window[source_name+"_values"];
    if (source_obj) {
        value_cells.filter("."+source_name).autocomplete({
        minLength: 0,
        source: source_obj
        });
    }
    }

    // add metadata field selector
    var metaNameField = createMetadataElementSelector();    
    table.after(metaNameField);
    table.metaNameField = metaNameField;
    
    /* add the buttons */
    // check enable_add_all_button - only valid for fixedlist and autocomplete
    if (enable_add_all_metadata_button == true) {
    if (new_metadata_field_input_type != "fixedlist" && new_metadata_field_input_type != "autocomplete") {
        enable_add_all_metadata_button = false;
    }
    }

    // add single metadata button
    var addRowButton = $("<button>",{"class": "ui-state-default ui-corner-all", "style": "margin: 5px;"});

    addRowButton.html(gs.text.de.add_new_metadata);
    addRowButton.click(function() 
    { 
            var name = metaNameField.val();
        if(!name || name == "")
        {
            console.log(gs.text.de.no_meta_name_given);
            return;
        }
        addNewMetadataRow(table, name);

        
    });
    table.addRowButton = addRowButton;
    metaNameField.after(addRowButton);

    // add all metadata button
    if (enable_add_all_metadata_button == true) {
    var addAllButton = $("<button>",{"class": "ui-state-default ui-corner-all", "style": "margin: 5px;"});
    addAllButton.html(gs.text.de.add_all_metadata);
    addAllButton.click(function()
               {
                   for(var i=0; i<availableMetadataElements.length; i++) {
                   
                       addNewMetadataRow(table, availableMetadataElements[i])
                   }
                   
               });
    table.addAllButton = addAllButton;
    addRowButton.after(addAllButton);
    
    }

}

function addNewMetadataRow(table, name) {

    var clean_name = name.replace(/[\.-]/g, "");
    var newRow = $("<tr>", {"style": "display: table-row;"});
    var nameCell;
    if (jQuery.inArray(name, multiValuedMetadata) != -1) {
    nameCell = $("<td>" + name + " <span title='"+gs.text.de.multi_valued_tooltip + "' style='float:right;'>"+mvm_delimiter+"</span></td>");
    } else {
    nameCell = $("<td>" + name + "</td>");
    }
    nameCell.attr("class", "metaTableCellName");
    var valueCell = $("<td>", {"class": "metaTableCell"});  
    var textValue = $("<textarea>", {"class": "metaTableCellArea "+ clean_name}); 
    
    if (jQuery.inArray(name, autocompleteMetadata) != -1) {
    var source_obje = window[clean_name +"_values"];
    if (source_obje) {
        textValue.autocomplete({
        minLength: 0,
        source: source_obje
        });
    }
    }
    valueCell.append(textValue);
    newRow.append(nameCell);
    newRow.append(valueCell);
    addRemoveLinkToRow(newRow.get(0));
    table.append(newRow);
    
    var undo = new Array();
    undo.op = "delMeta";
    undo.srcElem = newRow;
    undo.removeTransaction = false;
    _undoOperations.push(undo);
    if ( hierarchyStorage && hierarchyStorage[name])
    {
        setHierarchyEventsWrappers(name);
    }
}

function addRemoveLinkToRow(row)
{
    var newCell = $("<td>");
    var removeLink = $("<a>"+gs.text.de.remove+"</a>", {"href": "javascript:;"});
    removeLink.click(function()
    {
        var undo = new Array();
        undo.srcElem = row;
        undo.op = "display";
        undo.subOp = "table-row";
        undo.removeDeletedMetadata = true;
        _undoOperations.push(undo);
        _deletedMetadata.push(row);
        //row.css("display", "none");
        $(row).hide();
    });
    newCell.append(removeLink);
    newCell.attr({"class": "metaTableCellRemove", "style": "font-size:0.6em; padding-left: 3px; padding-right: 3px;"});
    $(row).append(newCell);
}

/* This is for 'edit structure' menu bar */
function createTopMenuBar()
{
    //Create the top menu bar
    var headerTable = document.createElement("TABLE");
    var tableBody = document.createElement("TBODY");
    var row = document.createElement("TR");
    var newDocCell = document.createElement("TD");
    var newSecCell = document.createElement("TD");
    var saveCell = document.createElement("TD");
    var undoCell = document.createElement("TD");
    var metadataListCell = document.createElement("TD");
    
    var metadataListLabel = document.createElement("SPAN");
    metadataListLabel.innerHTML = gs.text.de.visible_metadata; 
    var metadataList = document.createElement("SELECT");
    metadataList.setAttribute("id", "metadataSetList");
    metadataList.onchange = onVisibleMetadataSetChange;
    var allMetadataOption = document.createElement("OPTION");
    metadataList.appendChild(allMetadataOption);
    allMetadataOption.innerHTML = gs.text.de.all_metadata; 
    metadataListCell.appendChild(metadataListLabel);
    metadataListCell.appendChild(metadataList);

    metadataListCell.setAttribute("class", "headerTableTD");
    newDocCell.setAttribute("class", "headerTableTD");
    newSecCell.setAttribute("class", "headerTableTD");
    undoCell.setAttribute("class", "headerTableTD");
    saveCell.setAttribute("class", "headerTableTD");
    
    headerTable.appendChild(tableBody);
    tableBody.appendChild(row);
    row.appendChild(saveCell);
    row.appendChild(undoCell);
    row.appendChild(newDocCell);
    row.appendChild(newSecCell);
    row.appendChild(metadataListCell);

    //The "Save changes" button
    var saveButton = document.createElement("BUTTON");
    saveButton.innerHTML = gs.text.de.save_changes;
    saveButton.setAttribute("onclick", "saveAndRebuild();");
    saveButton.setAttribute("id", "saveButton");
    saveCell.appendChild(saveButton);
    
    //The "Undo" button
    var undoButton = document.createElement("BUTTON");
    undoButton.innerHTML = gs.text.dse.undo; 
    undoButton.setAttribute("onclick", "undo();");
    undoCell.appendChild(undoButton);

    //The "Create new document" button
    var newDocButton = document.createElement("BUTTON");
    newDocButton.innerHTML = gs.text.dse.create_new_document;
    newDocButton.setAttribute("onclick", "createNewDocumentArea();");
    newDocButton.setAttribute("id", "createNewDocumentButton");
    newDocCell.appendChild(newDocButton);

    //The "Insert new section" LI
    var newSecLI = createDraggableNewSection(newSecCell);
    
    return headerTable;
}

function getMetadataFromNode(node, name)
{
    var currentNode = node.firstChild;
    while(currentNode != null)
    {
        if(currentNode.nodeName == "metadataList")
        {
            currentNode = currentNode.firstChild;
            break;
        }
        
        currentNode = currentNode.nextSibling;
    }
    
    while(currentNode != null)
    {
        if(currentNode.nodeName == "metadata" && currentNode.getAttribute("name") == name)
        {
            return currentNode.firstChild.nodeValue;
        }
        
        currentNode = currentNode.nextSibling;
    }
    return "";
}

function storeMetadata(node, listItem)
{
    listItem.metadata = new Array();
    
    var currentNode = node.firstChild;
    while(currentNode != null)
    {
        if(currentNode.nodeName == "metadataList")
        {
            currentNode = currentNode.firstChild;
            break;
        }
        
        currentNode = currentNode.nextSibling;
    }
    
    while(currentNode != null)
    {
        if(currentNode.nodeName == "metadata")
        {
            listItem.metadata[currentNode.getAttribute("name")] = currentNode.firstChild.nodeValue;
        }
        
        currentNode = currentNode.nextSibling;
    }
}

function getNodeContent(node)
{
    var currentNode = node.firstChild;
    while(currentNode != null)
    {
        if(currentNode.nodeName == "nodeContent")
        {
            return currentNode.firstChild;
        }
        
        currentNode = currentNode.nextSibling;
    }
    return null;
}

function containsDocumentNode(node)
{
    var currentNode = node.firstChild;
    while(currentNode != null)
    {
        if(currentNode.nodeName == "documentNode")
        {
            return true;
        }
        
        currentNode = currentNode.nextSibling;
    }
    return false;
}

function isExpanded(textDiv)
{
    if(typeof textDiv.style == "undefined" || typeof textDiv.style.display == "undefined" || textDiv.style.display == "block")
    {
        return true;
    }
    return false;
}

function toggleTextDiv(section)
{
    var textDiv = section.textDiv;
    if(textDiv)
    {
        if(isExpanded(textDiv))
        {
            textDiv.style.display = "none";
            section.menu.editTextLink.innerHTML = gs.text.dse.edit;
        }
        else
        {
            textDiv.style.display = "block";
            section.menu.editTextLink.innerHTML = gs.text.dse.hide;
        }
    }
}

function updateFromTop()
{
    updateRecursive(document.getElementById("dbDiv"), null, null, 0);
}

function insertAfter(elem, refElem)
{
    if(refElem.nextSibling)
    {
        refElem.parentNode.insertBefore(elem, refElem.nextSibling);
    }
    else
    {
        refElem.parentNode.appendChild(elem);
    }
}

function removeFromParent(elem)
{
    elem.parentNode.removeChild(elem);
}

function createSectionTitle(text)
{
    var textSpan = document.createElement("SPAN");
    if(text)
    {
        textSpan.appendChild(document.createTextNode(" " + text + " "));
    }
    else
    {
        textSpan.appendChild(document.createTextNode(" [" + gs.text.dse.untitled_section + "] "));
    }
    return textSpan;
}

function setMouseOverAndOutFunctions(section)
{
    //Colour the list item and display the menu on mouse over
    section.onmouseover = function(e)
    {
        if(this.menu){this.menu.style.display = "inline";}
        this.style.background = "rgb(255, 200, 0)";
    };
    //Uncolour the list item and hide the menu on mouse out
    section.onmouseout = function(e)
    {
        if(this.menu){this.menu.style.display = "none";}
        this.style.background = "none";
    };
}

function createDraggableNewSection(parent)
{
    var newSecLI = document.createElement("LI");
    var newSpan = document.createElement("SPAN");
    newSpan.innerHTML = gs.text.dse.insert_new_section + " ";
    
    newSecLI.sectionTitle = newSpan;
    newSecLI.appendChild(newSpan);
    newSecLI.setAttribute("class", "dragItem newSection");
    newSecLI.newSection = true;
    newSecLI.parent = parent;
    newSecLI.index = -1;
    new YAHOO.example.DDList(newSecLI);
    parent.appendChild(newSecLI);
}

function closeAllOpenContents()
{
    for(var i = 0; i < _allContents.length; i++)
    {
        if(isExpanded(_allContents[i].textDiv))
        {
            toggleTextDiv(_allContents[i]);
        }
    }
    DDM.refreshCache();
}

//Status Bar class (initialised with new StatusBar(elem);)
function StatusBar(mainElem)
{
    var _statusMap = new Array();
    var _statusIDCounter = 0;
    var _mainElem = mainElem;
    var _activeMessages = 0;
    
    _mainElem.style.display = "none";
    
    this.addStatus = function(newStatus)
    {
        _mainElem.style.display = "block";
        var newStatusDiv = document.createElement("DIV");
        var newStatusSpan = document.createElement("SPAN");
        
        var workingImage = document.createElement("IMG"); 
        workingImage.setAttribute("src", gs.imageURLs.loading);
        workingImage.setAttribute("height", "16px");
        workingImage.setAttribute("width", "16px");
        newStatusDiv.appendChild(workingImage);
        
        newStatusDiv.appendChild(newStatusSpan);
        newStatusSpan.innerHTML = " " + newStatus;
        newStatusDiv.setAttribute("class", "statusMessage");        
        newStatusDiv.span = newStatusSpan;
        
        _mainElem.appendChild(newStatusDiv);
        _statusMap["status" + _statusIDCounter] = newStatusDiv;
        _activeMessages++;
        return _statusIDCounter++;
    }
    
    this.changeStatus = function(id, newStatus)
    {
        if(_statusMap["status" + id])
        {
            _statusMap["status" + id].span.innerHTML = " " + newStatus;
        }
    }
    
    this.removeStatus = function(id)
    {
        if(_statusMap["status" + id])
        {
            removeFromParent(_statusMap["status" + id]);
            
            if(--_activeMessages == 0)
            {
                _mainElem.style.display = "none";
            }
        }
    }
    
    this.clear = function()
    {
        for(var p in _statusMap)
        {
            if(_statusMap.hasOwnProperty(p))
            {
                if(_statusMap[p] && _statusMap[p].parentNode)
                {
                    removeFromParent(_statusMap[p]);
                }
            
                if(--_activeMessages == 0)
                {
                    _mainElem.style.display = "none";
                }
            }
        }
    }
}

/*
function toggleEdit(e)
{
    var mousePos = de.events.getXYInWindowFromEvent(e);
    var cDesc = de.cursor.getCursorDescAtXY(mousePos.x, mousePos.y, de.events.getEventTarget(e));
    de.cursor.setCursor(cDesc);
}
*/


$( document ).ready(function() {
    // DOM Ready.
    
    // Now can add handlers to monitor when ckeditor instances are all ready
    // See https://stackoverflow.com/questions/18461206/how-to-retrieve-the-ckeditor-status-ready
    // (and https://stackoverflow.com/questions/3447803/how-to-determine-if-ckeditor-is-loaded )
    if(gs.cgiParams.docEdit == "1") { // CKEDITOR only exists in docEdit mode
    
        //CKEDITOR.on( 'loaded', function( evt ) { // not triggered
            //console.log("*** CKEDITOR loaded");
            
            CKEDITOR.on( 'instanceReady', function( evt ) {
                //console.log("*** CKEDITOR instanceReady", evt);
                addCKEEditableState(evt,editableInitStates);
                // finished initialising one more editable element,
                // so decrement the counter keeping track of how many elements still need initialising
                editableElementsInitialisationProgress--;
            } );
        //} );
    }
    
});