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/*
 * SPEasyForms - modify SharePoint forms using jQuery (i.e. put fields on
 * tabs, show/hide fields, validate field values, modify the controls used 
 * to enter field values etc.)
 *
 * 
 * @requires jQuery-ui v1.9.2 
 * @requires jQuery.SPServices v2015.02 or greater
 * @optional ssw Session Storage Wrapper - Cross Document Transport of
 *    JavaScript Data; used to cache the context across pages if available
 *    and options.useCache === true
 * @copyright 2014-2018 Joe McShea
 * @license under the MIT license:
 *    http://www.opensource.org/licenses/mit-license.php
 */

/* global spefjQuery:true, ssw, PreSaveItem:true, _spPageContextInfo, ssw_init, ExecuteOrDelayUntilScriptLoaded, SP, SPClientTemplates, RegisterModuleInit */

// save a reference to our instance of jQuery just in case
//spefjQuery = jQuery.noConflict(true);

/* jshint -W098 */
function shouldSPEasyFormsRibbonButtonBeEnabled() {
    if (spefjQuery.spEasyForms.isConfigurableList()) {
        return true;
    } else {
        return false;
    }
}
/* jshint +W098 */

(function ($, undefined) {

    if (typeof ($) === 'undefined')
        return;

    function getScriptPath() {
        var scripts = document.getElementsByTagName('script');
        for (var i = 0; i < scripts.length; i++) {
            if (/jquery.speasyforms.*\.js/.test(scripts[i].src)) {
                return scripts[i];
            }
            return _spPageContextInfo.siteServerRelativeUrl + "/Style Library/SPEasyFormsAssets/2018.04/JavaSccript/jquery.SPEasyForms.min.js";
        }
    }

    if (typeof (SPClientTemplates) !== 'undefined' && SPClientTemplates.TemplateManager && SPClientTemplates.TemplateManager.RegisterTemplateOverrides) {
        if (window.location.href.indexOf("start.aspx#") >= 0) {
            var scriptUrl = getScriptPath();
            RegisterModuleInit(scriptUrl, function () {
                SPClientTemplates.TemplateManager.RegisterTemplateOverrides({
                    OnPreRender: function (ctx) {
                        if ($("body").attr("data-speasyforms-formhidden") !== "true") {
                            $("body").attr("data-speasyforms-formhidden", "true").append("<style type='text/css'>.ms-formtable { display: none; }</style>");
                        }
                    }
                });
            });
        }
        SPClientTemplates.TemplateManager.RegisterTemplateOverrides({
            OnPreRender: function (ctx) {
                if ($("body").attr("data-speasyforms-formhidden") !== "true") {
                    $("body").attr("data-speasyforms-formhidden", "true").append("<style type='text/css'>.ms-formtable { display: none; }</style>");
                }
            }
        });
    }

    if (!Object.keys) {
        Object.keys = function (obj) {
            return $.map(obj, function (v, k) {
                return k;
            });
        };
    }

    if (!Object.create) {
        Object.create = function (o) {
            function F() { }
            F.prototype = o;
            return new F();
        };
    }

    // cross-page caching object
    var cache = (typeof (ssw) !== 'undefined' ? ssw.get() : undefined);

    ////////////////////////////////////////////////////////////////////////////
    // Main entry point is init.
    ////////////////////////////////////////////////////////////////////////////
    $.spEasyForms = {
        defaults: {
            // use cross-page caching
            useCache: (typeof (ssw) !== 'undefined' || typeof (ssw_init) !== 'undefined'),
            // the maximum number of webs to cache
            maxWebCache: 6,
            // the maximum number of lists to cache per web
            maxListCache: 10,
            // the maximum number of containers that can be nested
            maxNestingLevels: 5,
            // path to the jquery-ui style sheet
            jQueryUITheme: "~sitecollection/Style Library/SPEasyFormsAssets/~version/Css/jquery-ui-redmond/jquery-ui.css",
            // path to the spEasyForms style sheet
            css: "~sitecollection/Style Library/SPEasyFormsAssets/~version/Css/speasyforms.css",
            // selector for an element in a form table row from which row 
            // will be obtained via .closest("tr")
            formBodySelector: "table td.ms-formbody",
            // regex for capturing field internal name, expects 
            // .match(tr.html(fieldInternalNameRegex)) result in match[1]
            fieldInternalNameRegex: /FieldInternalName=\"([^\"]*)\"/i,
            // regex for capturing field display name, expects 
            // tr.html().match() result in match[1]
            fieldDisplayNameRegex: /FieldName=\"([^\"]*)\"/i,
            // regex for capturing field type, expects tr.html().match() 
            // result in match[1]
            fieldTypeRegex: /FieldType=\"([^\"]*)\"/i,
            // if the above expressions do not work, this selector will be used to find
            // the field display name, pulling it's text and stripping any * or leading/trailing white space
            fieldDisplayNameAltSelector: 'h3.ms-standardheader',
            // appends a table with a bunch of context info to the page body
            verbose: window.location.href.indexOf('spEasyFormsVerbose=true') >= 0,
            initAsync: window.location.href.indexOf('spEasyFormsAsync=false') < 0,
            version: "2018.04",
            jQueryUIGallery: ["lilac", "olive", "redmond", "salmon", "smoothness", "sunny"],
            loadDynamicStylesAlways: false
        },

        /********************************************************************
         * Are we in a list context for a list type that SPEasyForms 
         * supports (currently we do not support Surveys or Discussion Boards,
         * but the list may grow as testing continues).
         ********************************************************************/
        isConfigurableList: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            // if we wern't passed a list context, try to get one
            if (!opt.currentListContext) {
                opt.currentListContext = $.spEasyForms.sharePointContext.getListContext(this.defaults);
            }
            // if we still don't have a list context
            if (!opt.currentListContext) {
                return false;
            }
            // if the list template is one we don't support
            if (opt.currentListContext.template === "102" || // survey
                opt.currentListContext.template === "108") { // discussion
                return false;
            }
            return true;
        },

        /********************************************************************
         * Initialize the library.  If we're on a form
         * that's been configured, apply configured transformations.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         ********************************************************************/
        init: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);

            if (!/\/SPEasyFormsSettings[a-zA-Z]*.aspx/.test(window.location.href)) {
                // exit if we don't see any form field rows
                var fieldRows = $("td.ms-formlabel h3.ms-standardheader, td.ms-formlabel span.ms-standardheader");
                //if (fieldRows.length === 0) {
                //    $("table.ms-formtable ").show();
                //    return;
                //}

                // exit if the form table contains an old RTE field (ERTE is fine)
                var formTable = fieldRows.first().closest("table");
                if (formTable.find("iframe[id$='TextField_iframe']").length > 0) {
                    $("table.ms-formtable").show();
                    ExecuteOrDelayUntilScriptLoaded(function () {
                        var dlg = SP.UI.ModalDialog.get_childDialog();
                        if (dlg !== null) {
                            setTimeout(function () {
                                if ($(".ms-formtable").css("display") === "none" || $("#spEasyFormsContainersPre").length > 0) {
                                    $.spEasyForms.utilities.resizeModalDialog();
                                }
                            }, 3000);
                        }
                    }, "sp.ui.dialog.js");
                    return;
                }
            }

            this.initCacheLibrary(opt);
            opt.callback = spEasyForms.contextReady;
            this.options = opt;
            $("#spEasyFormsBusyScreen").dialog({
                autoOpen: false,
                dialogClass: "speasyforms-busyscreen",
                closeOnEscape: false,
                draggable: false,
                width: 250,
                minHeight: 25,
                modal: true,
                buttons: {},
                resizable: false
            });
            $("#spEasyFormsBusyScreen").html("Initializing Form...").dialog('open');
            if (opt.initAsync) {
                $.spEasyForms.sharePointContext.initAsync(opt);
            } else {
                this.contextReady(options);
            }
            ExecuteOrDelayUntilScriptLoaded(function () {
                var dlg = SP.UI.ModalDialog.get_childDialog();
                if (dlg !== null) {
                    setTimeout(function () {
                        if ($(".ms-formtable").css("display") === "none" || $("#spEasyFormsContainersPre").length > 0) {
                            $.spEasyForms.utilities.resizeModalDialog();
                        }
                    }, 3000);
                }
            }, "sp.ui.dialog.js");
            // get a 'hashmap' of request parameters
            var parameters = $.spEasyForms.utilities.getRequestParameters();
            // get the parsed rows of the form table
            var rows = $.spEasyForms.sharePointFieldRows.init(options);
            // foreach request parameter
            $.each(Object.keys(parameters), function (idx, key) {
                // if the parameter name begins with the spef_ prefix
                if (key.indexOf("spef_") === 0) {
                    // the internal field name should be the parameter name with the prefix removed
                    var internalName = key.substring(5);
                    // if the parsed form rows contains a row matching the internal field name
                    if (internalName in rows) {
                        // initialize the row and value to set in the options map
                        opt.row = rows[internalName];
                        opt.value = parameters[key];
                        // set the value of the field
                        $.spEasyForms.sharePointFieldRows.setValue(opt);
                    }
                }
            });
            if ($.spEasyForms.defaults.verbose) {
                $("#spEasyFormsDiagButton").show().click(function () {
                    var win = window.open();
                    win.document.write("<pre>\n" + JSON.stringify($.spEasyForms.sharePointContext.getListContext(options), null, 4) + "\n</pre>");
                    win.document.close();
                });
            }
        },

        /********************************************************************
         * Callback to complete initialization after all asynchronous calls
         * are complete.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         ********************************************************************/
        contextReady: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            try {
                opt.currentContext = $.spEasyForms.sharePointContext.get(opt);
                opt.source = $.spEasyForms.utilities.getRequestParameters(opt).Source;
                opt.currentListContext = $.spEasyForms.sharePointContext.getListContext(opt);
                if (opt.loadDynamicStylesAlways) {
                    spEasyForms.loadDynamicStyles(opt);
                }

                /***
                 * Produce the editor on the SPEasyForms settings page.
                 ***/
                if (spEasyForms.isSettingsPage(opt)) {
                    if (!spEasyForms.containsOldRichTextFields(opt)) {
                        spEasyForms.toEditor(opt);
                    }
                }
                /***
                 * If it looks like a transformable form, try to transform it.
                 ***/
                else if (spEasyForms.isTransformable(opt)) {
                    spEasyForms.transform(opt);
                    if (_spPageContextInfo.webUIVersion === 4) {
                        var url = function (input) { return input.substr(0, input.indexOf("?")); };
                        if (url(document.referrer) !== url(window.location.href)) {
                            $("span.ms-error, span.ms-formvalidation").hide();
                        }
                        else {
                            $("span.ms-error, span.ms-formvalidation").show();
                        }
                        var span = $("span.ms-formvalidation[role='alert']");
                        $.each(span, function (i, current) {
                            if ($(current).prev().hasClass("ms-formvalidation")) {
                                $(current).hide();
                            }
                        });
                    }
                }
                /***
                 * If it looks like a transformable list settings page, insert an SPEasyForms list settings link.
                 ***/
                else if (spEasyForms.isConfigurableListSettings(opt)) {
                    spEasyForms.insertListSettingsLink(opt);
                }
                /***
                 * If it looks like a site settings page, insert an SPEasyForms site settings link.
                 ***/
                else if (window.location.href.toLowerCase().indexOf("/settings.aspx") > 0) {
                    spEasyForms.insertSiteSettingsLink(opt);
                }
            } finally {
                $("table.ms-formtable ").show();
                ExecuteOrDelayUntilScriptLoaded(function () {
                    var dlg = SP.UI.ModalDialog.get_childDialog();
                    if (dlg !== null) {
                        setTimeout(function () {
                            if ($(".ms-formtable").css("display") === "none" || $("#spEasyFormsContainersPre").length > 0) {
                                $.spEasyForms.utilities.resizeModalDialog();
                            }
                        }, 3000);
                    }
                }, "sp.ui.dialog.js");
                $("#spEasyFormsBusyScreen").dialog('close');
            }
            return this;
        },

        containsOldRichTextFields: function (options) {
            var errorFields = [];

            var containsOldRichTextFieldsInternal = function () {
                var res = false;
                errorFields = [];

                $.each(Object.keys(options.currentListContext.schema), function (idx, key) {
                    var field = options.currentListContext.schema[key];
                    if (field.type === "Note" && field.subtype === "RichText") {
                        if ($.inArray(field.displayName, errorFields) < 0) {
                            errorFields.push(field.displayName);
                        }
                        res = true;
                    }
                });

                return res;
            };

            var result = containsOldRichTextFieldsInternal();
            if (result === true) {
                $.spEasyForms.clearCachedContext(options);
                $.spEasyForms.sharePointContext.ctx = undefined;
                options.currentContext = $.spEasyForms.sharePointContext.get(options);
                options.currentListContext = $.spEasyForms.sharePointContext.getListContext(options);
                result = containsOldRichTextFieldsInternal();
                if (result === true) {
                    $.spEasyForms.loadDynamicStyles(options);
                    $("#spEasyFormsBusyScreen").dialog('close');
                    var rteOpts = {
                        modal: true,
                        buttons: {
                            "Ok": function () {
                                window.location.href = $.spEasyForms.utilities.getRequestParameters(options).Source;
                                return false;
                            }
                        },
                        autoOpen: false,
                        width: 400
                    };

                    $("#spEasyFormsErrorDialog").attr("title", "Unsupported Field Type");
                    $("#spEasyFormsErrorDialog").html("This list contains Rich Text Multi-line fields, which are not compatible with SPEasyForms (The display name(s) are: <b>" + errorFields.join(", ") + "</b>).<br/><br/>" +
                        "If you wish to configure this list with SPEasyForms, you must change them to either Enhanced Rich Text or Plain Text Multi-line fields.");
                    $("#spEasyFormsErrorDialog").dialog(rteOpts);
                    $("#spEasyFormsErrorDialog").dialog("open");
                }
            }

            return result;
        },

        /********************************************************************
         * Are we on the OOB list settings page (listedit.aspx) for a list 
         * type that SPEasyForms supports.
         ********************************************************************/
        isConfigurableListSettings: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            // if we're not in the context of a configurable list
            if (!spEasyForms.isConfigurableList(opt)) {
                return false;
            }
            return window.location.href.toLowerCase().indexOf("listedit.aspx") >= 0;
        },

        /********************************************************************
         * Are we on the SPEasyForms settings page (SPEassyFormsSettings.aspx).
         ********************************************************************/
        isSettingsPage: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            // if we're not in the context of a configurable list
            if (!spEasyForms.isConfigurableList(opt)) {
                if (/\/SPEasyFormsSettings[a-zA-Z]*.aspx/.test(window.location.href)) {
                    $("#spEasyFormsInitializationError").show();
                }
                return false;
            }
            return /\/SPEasyFormsSettings[a-zA-Z]*.aspx/.test(window.location.href);
        },

        /********************************************************************
         * Are we on the new, edit, or display form of a list type that
         * SPEasyForms supports.
         ********************************************************************/
        isTransformable: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            // if we're not in the context of a configurable list
            if (!spEasyForms.isConfigurableList(opt)) {
                return false;
            }
            // if the page name doesn't contain new, edit, or view
            if ($.spEasyForms.visibilityRuleCollection.getFormType(opt).length === 0) {
                return false;
            }
            // if we're on a new form for a folder
            if ($.spEasyForms.visibilityRuleCollection.getFormType(opt) === "new" && window.location.href.toLowerCase().indexOf("&type=1&") >= 0) {
                return false;
            }
            // if we're on any other form for a folder
            else if (window.location.href.toLowerCase().indexOf("&contenttypeid=0x0120") >= 0) {
                return false;
            }
            return true;
        },

        /********************************************************************
         * See if we have a configuration for the current list context and if so
         * execute any transformations, visibility rules, and/or field adapters
         * in the configuration.
         ********************************************************************/
        transform: function (opt) {
            opt.currentConfig = $.spEasyForms.configManager.get(opt);

            $.spEasyForms.defaults.formId = "WPQ2";
            try {
                var saveOnSubmit = $("input[id$='_diidIOSaveItem']")[0].getAttributeNode("onclick").nodeValue;
                var matches = saveOnSubmit.match(/SPClientForms\.ClientFormManager.SubmitClientForm\(\'([^\']*)\'/);
                if (matches && matches.length >= 2) $.spEasyForms.defaults.formId = matches[1];
            } catch (e) { }

            // if the current configuration is empty, just return
            if (opt.currentConfig.layout.def.length === 1 &&
                $.isEmptyObject(opt.currentConfig.adapters.def) &&
                $.isEmptyObject(opt.currentConfig.visibility.def)) {
                var dlg = SP.UI.ModalDialog.get_childDialog();
                if (dlg !== null) {
                    setTimeout(function () {
                        //if ($(".ms-formtable").css("display") === "none" || $("#spEasyFormsContainersPre").length > 0) {
                        $.spEasyForms.utilities.resizeModalDialog();
                        //}
                    }, 3000);
                }
                return; // no configuration, get out of dodge
            }
            // convert all lookups to simple selects, only for 2010 and
            // earlier, from Marc Anderson's SPServices documentation and 
            // attributed to Dan Kline
            $('.ms-lookuptypeintextbox').each(function () {
                $().SPServices.SPComplexToSimpleDropdown({
                    columnName: $(this).attr('title'),
                    debug: opt.verbose
                });
            });
            // add ms-formtable to the...um, form table. For some reason 
            // designer does not put this in custom forms.
            if ($("table.ms-formtable").length === 0) {
                $("td.ms-formlabel h3.ms-standardheader, td.ms-formlabel span.ms-standardheader").first().closest("table").addClass("ms-formtable");
            }
            $.spEasyForms.containerCollection.transform(opt);

            if (_spPageContextInfo.webUIVersion === 4) {
                $(".ui-widget input").css("font-size", "8pt");
            }

            $("input[id$='_diidIOSaveItem']").each(function () {
                if (null !== this.getAttributeNode("onclick")) {
                    var onSave = this.getAttributeNode("onclick").nodeValue;
                    onSave = onSave.replace(/return false;/g, "return spefjQuery.spEasyForms.containerCollection.postValidationAction();");
                    var newOnSave = document.createAttribute('onclick');
                    newOnSave.value = onSave;
                    this.setAttributeNode(newOnSave);
                }
            });
        },

        /********************************************************************
         * See if we have a configuration for the current list context and setup
         * the editor for the current configuration (or the default configuration).
         ********************************************************************/
        toEditor: function (opt) {
            opt.currentConfig = $.spEasyForms.configManager.get(opt);
            $("#msCuiTopbar").prepend("<h2 class='speasyforms-breadcrumbs'><a href='" + opt.source + "'>" + opt.currentListContext.title + "</a>  -&gt; SPEasyForms Configuration</h2>");

            $.each(opt.currentListContext.contentTypes.order, function (i, ctid) {
                if (ctid.indexOf("0x0120") !== 0) {
                    $("#spEasyFormsContentTypeSelect").append("<option value='" +
                        opt.currentListContext.contentTypes[ctid].id + "'>" +
                        opt.currentListContext.contentTypes[ctid].name + "</option>");
                }
            });

            $("#spEasyFormsContentTypeSelect").change(function () {
                delete $.spEasyForms.containerCollection.rows;
                delete $.spEasyForms.sharePointContext.formCache;
                opt.contentTypeChanged = true;
                opt.refresh = $.spEasyForms.refresh.all;
                $.spEasyForms.containerCollection.toEditor(opt);
            });

            $.spEasyForms.containerCollection.toEditor(opt);

            $(window).on("beforeunload", function () {
                if (!$("#spEasyFormsSaveButton").hasClass("speasyforms-disabled")) {
                    return "You have unsaved changes, are you sure you want to leave the page?";
                }
            });

            var bannerHeight = $("#suiteBarTop").height() + $("#suitBar").height() + $("#s4-ribbonrow").height() + $("#spEasyFormsRibbon").height() + 37;
            $("div.speasyforms-panel").height($(window).height() - bannerHeight);
            $("#spEasyFormsContent").height($(window).height() - bannerHeight).width($(window).width() - 460);
            $(window).resize(function () {
                $("div.speasyforms-panel").height($(window).height() - bannerHeight);
                $("#spEasyFormsContent").height($(window).height() - bannerHeight).width($(window).width() - 460);
            });
            $('#spEasyFormsRibbon').show();
        },

        /********************************************************************
         * Add a link to the SPEasyForms settings page to an OOB list settings
         * page (listedit.aspx).
         ********************************************************************/
        insertListSettingsLink: function (opt) {
            var generalSettings = $("td.ms-descriptiontext:contains('description and navigation')").closest("table");
            var permissionsLink = $("a:contains('Permissions for this list')");
            if (permissionsLink.length > 0) {
                if (generalSettings.length > 0) {
                    var source = window.location.href;
                    if (source.indexOf("start.aspx#") >= 0) {
                        source = $.spEasyForms.utilities.webRelativePathAsAbsolutePath(source.substring(source.indexOf('#') + 1));
                    }
                    var settings = $.spEasyForms.utilities.siteRelativePathAsAbsolutePath("/Style Library/SPEasyFormsAssets/2018.04/Pages/SPEasyFormsSettings.aspx") +
                        "?ListId=" + $.spEasyForms.sharePointContext.getCurrentListId(opt) +
                        "&SiteUrl=" + $.spEasyForms.sharePointContext.getCurrentSiteUrl(opt) +
                        "&Source=" + encodeURIComponent(source);
                    var newRow = "<tr>" +
                        "<td style='padding-top: 5px;' " +
                        "class='ms-descriptiontext ms-linksectionitembullet' " +
                        "vAlign='top' width='8' noWrap='nowrap'>" +
                        "<img alt='' src='/_layouts/images/setrect.gif?rev=37' width='5' height='5' />" +
                        "&nbsp;</td>" +
                        "<td class='ms-descriptiontext ms-linksectionitemdescription' vAlign='top'> " +
                        "<a href='" + settings + "'>SPEasyForms Configuration</a>" +
                        "</td>" +
                        "</tr>";
                    generalSettings.append(newRow);
                }
            }
        },

        /********************************************************************
         * Add a link to the SPEasyForms site settings page to an OOB site settings
         * page (settings.aspx).
         ********************************************************************/
        insertSiteSettingsLink: function (opt) {
            var usersAndPermissions = $("h3:contains('Users and Permissions')");
            var scaLink = usersAndPermissions.next().find("a:contains('Site collection administrators')");
            if (scaLink.length > 0) {
                var siteCollectionAdministrationList = $("h3:contains('Site Collection Administration')").next();
                if (siteCollectionAdministrationList.length > 0) {
                    var source = window.location.href;
                    if (source.indexOf("start.aspx#") >= 0) {
                        source = $.spEasyForms.utilities.webRelativePathAsAbsolutePath(source.substring(source.indexOf('#') + 1));
                    }
                    var settings = $.spEasyForms.utilities.siteRelativePathAsAbsolutePath("/Style Library/SPEasyFormsAssets/2018.04/Pages/SPEasyFormsSiteSettings.aspx") +
                        "?Source=" + encodeURIComponent(source);
                    var newItem = "<li class='ms-linksection-listItem'>" +
                        "<a title='Restore or permanently remove items that users have deleted on this site.' href='" + settings + "'>SPEasyForms</a>" +
                        "</li>";
                    siteCollectionAdministrationList.append(newItem);
                }
            }
        },

        /********************************************************************
         * Initialize the ssw caching library.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         ********************************************************************/
        initCacheLibrary: function (options) {
            if (typeof (cache) === 'undefined' && options.cache !== undefined) {
                cache = options.cache;
            }

            if (typeof (ssw) === 'undefined' && typeof (ssw_init) !== 'undefined') {
                ssw_init(window, document);
                if (typeof (cache) === 'undefined') {
                    cache = ssw.get();
                }
            }
        },

        /********************************************************************
         * Load the jquery-ui and spEasyForms style sheets.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         ********************************************************************/
        loadDynamicStyles: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            opt.currentConfig = $.spEasyForms.configManager.get(opt);
            opt.source = "~sitecollection/Style Library/SPEasyFormsAssets/2018.04/Css/jquery-ui-smoothness/jquery-ui.css";
            var theme = this.replaceVariables(opt);

            // determine if the theme is set at the list or site level
            if (opt.currentConfig && opt.currentConfig.jQueryUITheme) {
                opt.source = opt.currentConfig.jQueryUITheme;
                theme = this.replaceVariables(opt);
            }
            else {
                if (opt.jQueryUITheme) {
                    opt.source = opt.jQueryUITheme;
                    theme = this.replaceVariables(opt);
                }
            }

            // load the jQuery UI theme
            $("head").append(
                '<link rel="stylesheet" type="text/css" href="' + theme + '">');

            // load the spEasyForms CSS
            opt.source = opt.css;
            theme = this.replaceVariables(opt);
            $("head").append(
                '<link rel="stylesheet" type="text/css" href="' + theme + '">');

            if ($.spEasyForms.userDefaults.additionalFiles) {
                $.each($($.spEasyForms.userDefaults.additionalFiles), function (idx, file) {
                    if (/\.css$/.test(file)) {
                        opt.source = file;
                        var path = $.spEasyForms.replaceVariables(opt);
                        $("head").append(
                            '<link rel="stylesheet" type="text/css" href="' + path + '">');
                    }
                });
            }
        },

        replaceVariables: function (options) {
            if (options.currentContext.siteRelativeUrl.length === 1) {
                options.source = options.source.replace(/~sitecollection/g, "");
            }
            else {
                options.source = options.source.replace(/~sitecollection/g, options.currentContext.siteRelativeUrl);
            }
            options.source = options.source.replace(/~site/g, options.currentContext.webRelativeUrl);
            options.source = options.source.replace(/~version/g, options.version);
            return options.source;
        },

        /*********************************************************************
         * Clear the cross page cache and set any objects retrieved from it
         * to undefined.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         *********************************************************************/
        clearCachedContext: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            if (opt.useCache) {
                cache = {};
                ssw.clear();
            }
        },

        /*********************************************************************
         * Stores the local context variable in cache if options.useCache
         * equals true.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         *********************************************************************/
        writeCachedContext: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            if (typeof (ssw) !== 'undefined') {
                var key = "spEasyForms_spContext_" + opt.currentContext.webRelativeUrl;
                if (!(key in cache)) {
                    if (Object.keys(cache).length >= opt.maxWebCache) {
                        ssw.remove(Object.keys(cache)[0]);
                    }
                }
                var obj = {};
                obj[key] = opt.currentContext;
                ssw.add(obj);
            }
        },

        /*********************************************************************
         * Reads the local context variable from cache if options.useCache
         * equals true.
         *
         * @param {object} options - {
         *     // see the definition of defaults for options
         * }
         *********************************************************************/
        readCachedContext: function (options) {
            var opt = $.extend({}, spEasyForms.defaults, options);
            if (opt.useCache === true) {
                var key = "spEasyForms_spContext_";
                if (opt.siteUrl) {
                    key += opt.siteUrl;
                }
                return cache[key];
            }
            return undefined;
        },
    };
    var spEasyForms = $.spEasyForms;

})(typeof (spefjQuery) === 'undefined' ? undefined : spefjQuery);
