source: Dev/trunk/src/client/dojox/atom/widget/FeedEntryViewer.js

define([
        "dojo/_base/kernel",
        "dojo/_base/connect",
        "dojo/_base/declare",
        "dojo/_base/fx",
        "dojo/_base/array",
        "dojo/dom-style",
        "dojo/dom-construct",
        "dijit/_Widget",
        "dijit/_Templated",
        "dijit/_Container",
        "dijit/layout/ContentPane",
        "../io/Connection",
        "dojo/text!./templates/FeedEntryViewer.html",
        "dojo/text!./templates/EntryHeader.html",
        "dojo/i18n!./nls/FeedEntryViewer"
], function (dojo, connect, declare, fx, arrayUtil, domStyle, domConstruct, _Widget, _Templated, _Container, ContentPane, Connection, template, headerTemplate, i18nViewer) {

dojo.experimental("dojox.atom.widget.FeedEntryViewer");


var FeedEntryViewer = declare("dojox.atom.widget.FeedEntryViewer", [_Widget, _Templated, _Container],{
        // summary:
        //              An ATOM feed entry editor for publishing updated ATOM entries, or viewing non-editable entries.

        entrySelectionTopic: "",        //The topic to listen on for entries to edit.

        _validEntryFields: {},          //The entry fields that were present on the entry and are being displayed.
                                                                //This works in conjunction with what is selected to be displayed.
        displayEntrySections: "", //What current sections of the entries to display as a comma separated list.
        _displayEntrySections: null,
        
        //Control options for the display options menu.
        enableMenu: false,
        enableMenuFade: false,
        _optionButtonDisplayed: true,

        //Templates for the HTML rendering.  Need to figure these out better, admittedly.
        templateString: template,
        
        _entry: null, //The entry that is being viewed/edited.
        _feed: null, //The feed the entry came from.

        _editMode: false, //Flag denoting the state of the widget, in edit mode or not.
        
        postCreate: function(){
                if(this.entrySelectionTopic !== ""){
                        this._subscriptions = [dojo.subscribe(this.entrySelectionTopic, this, "_handleEvent")];
                }
                var _nlsResources = i18nViewer;
                this.displayOptions.innerHTML = _nlsResources.displayOptions;
                this.feedEntryCheckBoxLabelTitle.innerHTML = _nlsResources.title;
                this.feedEntryCheckBoxLabelAuthors.innerHTML = _nlsResources.authors;
                this.feedEntryCheckBoxLabelContributors.innerHTML = _nlsResources.contributors;
                this.feedEntryCheckBoxLabelId.innerHTML = _nlsResources.id;
                this.close.innerHTML = _nlsResources.close;
                this.feedEntryCheckBoxLabelUpdated.innerHTML = _nlsResources.updated;
                this.feedEntryCheckBoxLabelSummary.innerHTML = _nlsResources.summary;
                this.feedEntryCheckBoxLabelContent.innerHTML = _nlsResources.content;
        },

        startup: function(){
                if(this.displayEntrySections === ""){
                        this._displayEntrySections = ["title","authors","contributors","summary","content","id","updated"];
                }else{
                        this._displayEntrySections = this.displayEntrySections.split(",");
                }
                this._setDisplaySectionsCheckboxes();

                if(this.enableMenu){
                        domStyle.set(this.feedEntryViewerMenu, 'display', '');
                        if(this.entryCheckBoxRow && this.entryCheckBoxRow2){
                                if(this.enableMenuFade){
                                        fx.fadeOut({node: this.entryCheckBoxRow,duration: 250}).play();
                                        fx.fadeOut({node: this.entryCheckBoxRow2,duration: 250}).play();
                                }
                        }
                }
        },

        clear: function(){
                // summary:
                //              Function to clear the state of the widget.

                this.destroyDescendants();
                this._entry=null;
                this._feed=null;
                this.clearNodes();
        },
        
        clearNodes: function(){
                // summary:
                //              Function to clear all the display nodes for the ATOM entry from the viewer.

                arrayUtil.forEach([
                        "entryTitleRow", "entryAuthorRow", "entryContributorRow", "entrySummaryRow", "entryContentRow",
                        "entryIdRow", "entryUpdatedRow"
                        ], function(node){
                                domStyle.set(this[node], "display", "none");
                        }, this);

                arrayUtil.forEach([
                        "entryTitleNode", "entryTitleHeader", "entryAuthorHeader", "entryContributorHeader",
                        "entryContributorNode", "entrySummaryHeader", "entrySummaryNode", "entryContentHeader",
                        "entryContentNode", "entryIdNode", "entryIdHeader", "entryUpdatedHeader", "entryUpdatedNode"
                        ], function(part){
                                while(this[part].firstChild){
                                        domConstruct.destroy(this[part].firstChild);
                                }
                        }
                ,this);
                
        },

        setEntry: function(/*object*/entry, /*object*/feed, /*boolean*/leaveMenuState){
                // summary:
                //              Function to set the current entry that is being edited.
                // entry:
                //              Instance of dojox.atom.io.model.Entry to display for reading/editing.
                this.clear();
                this._validEntryFields = {};
                this._entry = entry;
                this._feed = feed;

                if(entry !== null){
                        // Handle the title.
                        if(this.entryTitleHeader){
                                this.setTitleHeader(this.entryTitleHeader, entry);
                        }
                        
                        if(this.entryTitleNode){
                                this.setTitle(this.entryTitleNode, this._editMode, entry);
                        }

                        if(this.entryAuthorHeader){
                                this.setAuthorsHeader(this.entryAuthorHeader, entry);
                        }

                        if(this.entryAuthorNode){
                                this.setAuthors(this.entryAuthorNode, this._editMode, entry);
                        }
                        
                        if(this.entryContributorHeader){
                                this.setContributorsHeader(this.entryContributorHeader, entry);
                        }

                        if(this.entryContributorNode){
                                this.setContributors(this.entryContributorNode, this._editMode, entry);
                        }

                        if(this.entryIdHeader){
                                this.setIdHeader(this.entryIdHeader, entry);
                        }

                        if(this.entryIdNode){
                                this.setId(this.entryIdNode, this._editMode, entry);
                        }

                        if(this.entryUpdatedHeader){
                                this.setUpdatedHeader(this.entryUpdatedHeader, entry);
                        }

                        if(this.entryUpdatedNode){
                                this.setUpdated(this.entryUpdatedNode, this._editMode, entry);
                        }

                        if(this.entrySummaryHeader){
                                this.setSummaryHeader(this.entrySummaryHeader, entry);
                        }

                        if(this.entrySummaryNode){
                                this.setSummary(this.entrySummaryNode, this._editMode, entry);
                        }

                        if(this.entryContentHeader){
                                this.setContentHeader(this.entryContentHeader, entry);
                        }

                        if(this.entryContentNode){
                                this.setContent(this.entryContentNode, this._editMode, entry);
                        }
                }
                this._displaySections();
        },

        setTitleHeader: function(/*DOMNode*/ titleHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the title header node in the template to some value.
                // description:
                //              Function to set the contents of the title header node in the template to some value.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // titleAnchorNode:
                //              The DOM node to attach the title data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.

                if(entry.title && entry.title.value && entry.title.value !== null){
                        var _nlsResources = i18nViewer;
                        var titleHeader = new EntryHeader({title: _nlsResources.title});
                        titleHeaderNode.appendChild(titleHeader.domNode);
                }
        },

        setTitle: function(titleAnchorNode, editMode, entry){
                // summary:
                //              Function to set the contents of the title node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the title node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // titleAnchorNode:
                //              The DOM node to attach the title data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.title && entry.title.value && entry.title.value !== null){
                        if(entry.title.type == "text"){
                                var titleNode = document.createTextNode(entry.title.value);
                                titleAnchorNode.appendChild(titleNode);
                        }else{
                                var titleViewNode = document.createElement("span");
                                var titleView = new ContentPane({refreshOnShow: true, executeScripts: false}, titleViewNode);
                                titleView.attr('content', entry.title.value);
                                titleAnchorNode.appendChild(titleView.domNode);
                        }
                        this.setFieldValidity("title", true);
                }
        },

        setAuthorsHeader: function(/*DOMNode*/ authorHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the title format for the authors section of the author row in the template to some value from the entry.
                // description:
                //              Function to set the title format for the authors section of the author row in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the author data is filled out from an entry.
                // authorHeaderNode:
                //              The DOM node to attach the author section header data to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.authors && entry.authors.length > 0){
                        var _nlsResources = i18nViewer;
                        var authorHeader = new EntryHeader({title: _nlsResources.authors});
                        authorHeaderNode.appendChild(authorHeader.domNode);
                }
        },

        setAuthors: function(/*DOMNode*/ authorsAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the author node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the author node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // authorsAnchorNode:
                //              The DOM node to attach the author data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                authorsAnchorNode.innerHTML = "";
                if(entry.authors && entry.authors.length > 0){
                        for(var i in entry.authors){
                                if(entry.authors[i].name){
                                        var anchor = authorsAnchorNode;
                                        if(entry.authors[i].uri){
                                                var link = document.createElement("a");
                                                anchor.appendChild(link);
                                                link.href = entry.authors[i].uri;
                                                anchor = link;
                                        }
                                        var name = entry.authors[i].name;
                                        if(entry.authors[i].email){
                                                name = name + " (" + entry.authors[i].email + ")";
                                        }
                                        var authorNode = document.createTextNode(name);
                                        anchor.appendChild(authorNode);
                                        var breakNode = document.createElement("br");
                                        authorsAnchorNode.appendChild(breakNode);
                                        this.setFieldValidity("authors", true);
                                }
                        }
                }
        },

        setContributorsHeader: function(/*DOMNode*/ contributorsHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the contributor header node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the contributor header node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // contributorsHeaderNode:
                //              The DOM node to attach the contributor title to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.contributors && entry.contributors.length > 0){
                        var _nlsResources = i18nViewer;
                        var contributorHeader = new EntryHeader({title: _nlsResources.contributors});
                        contributorsHeaderNode.appendChild(contributorHeader.domNode);
                }
        },


        setContributors: function(/*DOMNode*/ contributorsAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the contributor node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the contributor node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // contributorsAnchorNode:
                //              The DOM node to attach the contributor data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.contributors && entry.contributors.length > 0){
                        for(var i in entry.contributors){
                                var contributorNode = document.createTextNode(entry.contributors[i].name);
                                contributorsAnchorNode.appendChild(contributorNode);
                                var breakNode = document.createElement("br");
                                contributorsAnchorNode.appendChild(breakNode);
                                this.setFieldValidity("contributors", true);
                        }
                }
        },

                                 
        setIdHeader: function(/*DOMNode*/ idHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the ID  node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the ID node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // idAnchorNode:
                //              The DOM node to attach the ID data to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.id && entry.id !== null){
                        var _nlsResources = i18nViewer;
                        var idHeader = new EntryHeader({title: _nlsResources.id});
                        idHeaderNode.appendChild(idHeader.domNode);
                }
        },


        setId: function(/*DOMNode*/ idAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the ID  node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the ID node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // idAnchorNode:
                //              The DOM node to attach the ID data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.id && entry.id !== null){
                        var idNode = document.createTextNode(entry.id);
                        idAnchorNode.appendChild(idNode);
                        this.setFieldValidity("id", true);
                }
        },
        
        setUpdatedHeader: function(/*DOMNode*/ updatedHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the updated header node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the updated header node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // updatedHeaderNode:
                //              The DOM node to attach the updated header data to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.updated && entry.updated !== null){
                        var _nlsResources = i18nViewer;
                        var updatedHeader = new EntryHeader({title: _nlsResources.updated});
                        updatedHeaderNode.appendChild(updatedHeader.domNode);
                }
        },

        setUpdated: function(/*DOMNode*/ updatedAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the updated  node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the updated node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // updatedAnchorNode:
                //              The DOM node to attach the udpated data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.updated && entry.updated !== null){
                        var updatedNode = document.createTextNode(entry.updated);
                        updatedAnchorNode.appendChild(updatedNode);
                        this.setFieldValidity("updated", true);
                }
        },

        setSummaryHeader: function(/*DOMNode*/ summaryHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the summary  node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the summary node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // summaryHeaderNode:
                //              The DOM node to attach the summary title to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.summary && entry.summary.value && entry.summary.value !== null){
                        var _nlsResources = i18nViewer;
                        var summaryHeader = new EntryHeader({title: _nlsResources.summary});
                        summaryHeaderNode.appendChild(summaryHeader.domNode);
                }
        },


        setSummary: function(/*DOMNode*/ summaryAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the summary  node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the summary node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // summaryAnchorNode:
                //              The DOM node to attach the summary data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.summary && entry.summary.value && entry.summary.value !== null){
                        var summaryViewNode = document.createElement("span");
                        var summaryView = new ContentPane({refreshOnShow: true, executeScripts: false}, summaryViewNode);
                        summaryView.attr('content', entry.summary.value);
                        summaryAnchorNode.appendChild(summaryView.domNode);
                        this.setFieldValidity("summary", true);
                }
        },

        setContentHeader: function(/*DOMNode*/ contentHeaderNode, /*object*/entry){
                // summary:
                //              Function to set the contents of the content node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the content node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // contentHeaderNode:
                //              The DOM node to attach the content data to.
                // entry:
                //              The Feed Entry to work with.
                if(entry.content && entry.content.value && entry.content.value !== null){
                        var _nlsResources = i18nViewer;
                        var contentHeader = new EntryHeader({title: _nlsResources.content});
                        contentHeaderNode.appendChild(contentHeader.domNode);
                }
        },

        setContent: function(/*DOMNode*/ contentAnchorNode, /*boolean*/editMode, /*object*/entry){
                // summary:
                //              Function to set the contents of the content node in the template to some value from the entry.
                // description:
                //              Function to set the contents of the content node in the template to some value from the entry.
                //              This exists specifically so users can over-ride how the title data is filled out from an entry.
                // contentAnchorNode:
                //              The DOM node to attach the content data to.
                // editMode:
                //              Boolean to indicate if the display should be in edit mode or not.
                // entry:
                //              The Feed Entry to work with.
                if(entry.content && entry.content.value && entry.content.value !== null){
                        var contentViewNode = document.createElement("span");
                        var contentView = new ContentPane({refreshOnShow: true, executeScripts: false},contentViewNode);
                        contentView.attr('content', entry.content.value);
                        contentAnchorNode.appendChild(contentView.domNode);
                        this.setFieldValidity("content", true);
                }
        },


        _displaySections: function(){
                // summary:
                //              Internal function for determining which sections of the view to actually display.
                // returns:
                //              Nothing.
                domStyle.set(this.entryTitleRow, 'display', 'none');
                domStyle.set(this.entryAuthorRow, 'display', 'none');
                domStyle.set(this.entryContributorRow, 'display', 'none');
                domStyle.set(this.entrySummaryRow, 'display', 'none');
                domStyle.set(this.entryContentRow, 'display', 'none');
                domStyle.set(this.entryIdRow, 'display', 'none');
                domStyle.set(this.entryUpdatedRow, 'display', 'none');

                for(var i in this._displayEntrySections){
                        var section = this._displayEntrySections[i].toLowerCase();
                        if(section === "title" && this.isFieldValid("title")){
                                domStyle.set(this.entryTitleRow, 'display', '');
                        }
                        if(section === "authors" && this.isFieldValid("authors")){
                                domStyle.set(this.entryAuthorRow, 'display', '');
                        }
                        if(section === "contributors" && this.isFieldValid("contributors")){
                                domStyle.set(this.entryContributorRow, 'display', '');
                        }
                        if(section === "summary" && this.isFieldValid("summary")){
                                domStyle.set(this.entrySummaryRow, 'display', '');
                        }
                        if(section === "content" && this.isFieldValid("content")){
                                domStyle.set(this.entryContentRow, 'display', '');
                        }
                        if(section === "id" && this.isFieldValid("id")){
                                domStyle.set(this.entryIdRow, 'display', '');
                        }
                        if(section === "updated" && this.isFieldValid("updated")){
                                domStyle.set(this.entryUpdatedRow, 'display', '');
                        }

                }
        },

        setDisplaySections: function(/*array*/sectionsArray){
                // summary:
                //              Function for setting which sections of the entry should be displayed.
                // sectionsArray:
                //              Array of string names that indicate which sections to display.
                // returns:
                //              Nothing.
                if(sectionsArray !== null){
                        this._displayEntrySections = sectionsArray;
                        this._displaySections();
                }else{
                        this._displayEntrySections = ["title","authors","contributors","summary","content","id","updated"];
                }
        },

        _setDisplaySectionsCheckboxes: function(){
                // summary:
                //              Internal function for setting which checkboxes on the display are selected.
                // returns:
                //              Nothing.
                var items = ["title","authors","contributors","summary","content","id","updated"];
                for(var i in items){
                        if(arrayUtil.indexOf(this._displayEntrySections, items[i]) == -1){
                                domStyle.set(this["feedEntryCell"+items[i]], 'display', 'none');
                        }else{
                                this["feedEntryCheckBox"+items[i].substring(0,1).toUpperCase()+items[i].substring(1)].checked=true;
                        }
                }
        },

        _readDisplaySections: function(){
                // summary:
                //              Internal function for reading what is currently checked for display and generating the display list from it.
                var checkedList = [];

                if(this.feedEntryCheckBoxTitle.checked){
                        checkedList.push("title");
                }
                if(this.feedEntryCheckBoxAuthors.checked){
                        checkedList.push("authors");
                }
                if(this.feedEntryCheckBoxContributors.checked){
                        checkedList.push("contributors");
                }
                if(this.feedEntryCheckBoxSummary.checked){
                        checkedList.push("summary");
                }
                if(this.feedEntryCheckBoxContent.checked){
                        checkedList.push("content");
                }
                if(this.feedEntryCheckBoxId.checked){
                        checkedList.push("id");
                }
                if(this.feedEntryCheckBoxUpdated.checked){
                        checkedList.push("updated");
                }
                this._displayEntrySections = checkedList;
        },

        _toggleCheckbox: function(/*object*/checkBox){
                // summary:
                //              Internal function for determining of a particular entry is editable.
                // description:
                //              Internal function for determining of a particular entry is editable.
                //              This is used for determining if the delete action should be displayed or not.
                // checkBox:
                //              The checkbox object to toggle the selection on.
                if(checkBox.checked){
                        checkBox.checked=false;
                }else{
                        checkBox.checked=true;
                }
                this._readDisplaySections();
                this._displaySections();
        },

        _toggleOptions: function(/*object*/checkBox){
                // summary:
                //              Internal function for determining of a particular entry is editable.
                // description:
                //              Internal function for determining of a particular entry is editable.
                //              This is used for determining if the delete action should be displayed or not.
                // checkBox:
                //              The checkbox object to toggle the selection on.
                if(this.enableMenu){
                        var fade = null;
                        var anim;
                        var anim2;
                        if(this._optionButtonDisplayed){
                                if(this.enableMenuFade){
                                        anim = fx.fadeOut({node: this.entryCheckBoxDisplayOptions,duration: 250});
                                        connect.connect(anim, "onEnd", this, function(){
                                                domStyle.set(this.entryCheckBoxDisplayOptions, 'display', 'none');
                                                domStyle.set(this.entryCheckBoxRow, 'display', '');
                                                domStyle.set(this.entryCheckBoxRow2, 'display', '');
                                                fx.fadeIn({node: this.entryCheckBoxRow, duration: 250}).play();
                                                fx.fadeIn({node: this.entryCheckBoxRow2, duration: 250}).play();
                                        });
                                        anim.play();
                                }else{
                                        domStyle.set(this.entryCheckBoxDisplayOptions, 'display', 'none');
                                        domStyle.set(this.entryCheckBoxRow, 'display', '');
                                        domStyle.set(this.entryCheckBoxRow2, 'display', '');
                                }
                                this._optionButtonDisplayed=false;
                        }else{
                                if(this.enableMenuFade){
                                        anim = fx.fadeOut({node: this.entryCheckBoxRow,duration: 250});
                                        anim2 = fx.fadeOut({node: this.entryCheckBoxRow2,duration: 250});
                                        connect.connect(anim, "onEnd", this, function(){
                                                domStyle.set(this.entryCheckBoxRow, 'display', 'none');
                                                domStyle.set(this.entryCheckBoxRow2, 'display', 'none');
                                                domStyle.set(this.entryCheckBoxDisplayOptions, 'display', '');
                                                fx.fadeIn({node: this.entryCheckBoxDisplayOptions, duration: 250}).play();
                                        });
                                        anim.play();
                                        anim2.play();
                                }else{
                                        domStyle.set(this.entryCheckBoxRow, 'display', 'none');
                                        domStyle.set(this.entryCheckBoxRow2, 'display', 'none');
                                        domStyle.set(this.entryCheckBoxDisplayOptions, 'display', '');
                                }
                                this._optionButtonDisplayed=true;
                        }
                }
        },

        _handleEvent: function(/*object*/entrySelectionEvent){
                // summary:
                //              Internal function for listening to a topic that will handle entry notification.
                // entrySelectionEvent:
                //              The topic message containing the entry that was selected for view.
                // returns:
                //              Nothing.
                if(entrySelectionEvent.source != this){
                        if(entrySelectionEvent.action == "set" && entrySelectionEvent.entry){
                                this.setEntry(entrySelectionEvent.entry, entrySelectionEvent.feed);
                        }else if(entrySelectionEvent.action == "delete" && entrySelectionEvent.entry && entrySelectionEvent.entry == this._entry){
                                this.clear();
                        }
                }
        },

        setFieldValidity: function(/*string*/field, /*boolean*/isValid){
                // summary:
                //              Function to set whether a field in the view is valid and displayable.
                // description:
                //              Function to set whether a field in the view is valid and displayable.
                //              This is needed for over-riding of the set* functions and customization of how data is displayed in the attach point.
                //              So if custom implementations use their own display logic, they can still enable the field.
                // field:
                //              The field name to set the valid parameter on.  Such as 'content', 'id', etc.
                // isValid:
                //              Flag denoting if the field is valid or not.
                // returns:
                //              Nothing.
                if(field){
                        var lowerField = field.toLowerCase();
                        this._validEntryFields[field] = isValid;
                }
        },
        
        isFieldValid: function(/*string*/field){
                // summary:
                //              Function to return if a displayable field is valid or not
                // field:
                //              The field name to get the valid parameter of.  Such as 'content', 'id', etc.
                // returns:
                //              boolean denoting if the field is valid and set.
                return this._validEntryFields[field.toLowerCase()];
        },

        getEntry: function(){
                return this._entry;
        },

        getFeed: function(){
                 return this._feed;
        },

        destroy: function(){
                this.clear();
                arrayUtil.forEach(this._subscriptions, dojo.unsubscribe);
        }
});

var EntryHeader = FeedEntryViewer.EntryHeader = declare("dojox.atom.widget.EntryHeader", [_Widget, _Templated, _Container],{
        // summary:
        //              Widget representing a header in a FeedEntryViewer/Editor
        title: "",
        templateString: headerTemplate,

        postCreate: function(){
                this.setListHeader();
        },

        setListHeader: function(/*string*/title){
                this.clear();
                if(title){
                        this.title = title;
                }
                var textNode = document.createTextNode(this.title);
                this.entryHeaderNode.appendChild(textNode);
        },

        clear: function(){
                this.destroyDescendants();
                 if(this.entryHeaderNode){
                         for(var i = 0; i < this.entryHeaderNode.childNodes.length; i++){
                                 this.entryHeaderNode.removeChild(this.entryHeaderNode.childNodes[i]);
                         }
                 }
        },

        destroy: function(){
                this.clear();
        }
});


return FeedEntryViewer;
});