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             \n                                                                                                                                                                                                       \n\n*/\n(function (f, define) {\n    define('kendo.virtuallist', ['kendo.data'], f);\n}(function () {\n    var __meta__ = {\n        id: 'virtuallist',\n        name: 'VirtualList',\n        category: 'framework',\n        depends: ['data'],\n        hidden: true\n    };\n    (function ($, undefined) {\n        var kendo = window.kendo, ui = kendo.ui, Widget = ui.Widget, DataBoundWidget = ui.DataBoundWidget, proxy = $.proxy, WRAPPER = 'k-virtual-wrap', VIRTUALLIST = 'k-virtual-list', CONTENT = 'k-virtual-content', LIST = 'k-list', HEADER = 'k-group-header', VIRTUALITEM = 'k-virtual-item', ITEM = 'k-item', HEIGHTCONTAINER = 'k-height-container', GROUPITEM = 'k-group', SELECTED = 'k-state-selected', FOCUSED = 'k-state-focused', HOVER = 'k-state-hover', CHANGE = 'change', CLICK = 'click', LISTBOUND = 'listBound', ITEMCHANGE = 'itemChange', ACTIVATE = 'activate', DEACTIVATE = 'deactivate', VIRTUAL_LIST_NS = '.VirtualList';\n        function lastFrom(array) {\n            return array[array.length - 1];\n        }\n        function toArray(value) {\n            return value instanceof Array ? value : [value];\n        }\n        function isPrimitive(dataItem) {\n            return typeof dataItem === 'string' || typeof dataItem === 'number' || typeof dataItem === 'boolean';\n        }\n        function getItemCount(screenHeight, listScreens, itemHeight) {\n            return Math.ceil(screenHeight * listScreens / itemHeight);\n        }\n        function appendChild(parent, className, tagName) {\n            var element = document.createElement(tagName || 'div');\n            if (className) {\n                element.className = className;\n            }\n            parent.appendChild(element);\n            return element;\n        }\n        function getDefaultItemHeight() {\n            var mockList = $('<div class=\"k-popup\"><ul class=\"k-list\"><li class=\"k-item\"><li></ul></div>'), lineHeight;\n            mockList.css({\n                position: 'absolute',\n                left: '-200000px',\n                visibility: 'hidden'\n            });\n            mockList.appendTo(document.body);\n            lineHeight = parseFloat(kendo.getComputedStyles(mockList.find('.k-item')[0], ['line-height'])['line-height']);\n            mockList.remove();\n            return lineHeight;\n        }\n        function bufferSizes(screenHeight, listScreens, opposite) {\n            return {\n                down: screenHeight * opposite,\n                up: screenHeight * (listScreens - 1 - opposite)\n            };\n        }\n        function listValidator(options, screenHeight) {\n            var downThreshold = (options.listScreens - 1 - options.threshold) * screenHeight;\n            var upThreshold = options.threshold * screenHeight;\n            return function (list, scrollTop, lastScrollTop) {\n                if (scrollTop > lastScrollTop) {\n                    return scrollTop - list.top < downThreshold;\n                } else {\n                    return list.top === 0 || scrollTop - list.top > upThreshold;\n                }\n            };\n        }\n        function scrollCallback(element, callback) {\n            return function (force) {\n                return callback(element.scrollTop, force);\n            };\n        }\n        function syncList(reorder) {\n            return function (list, force) {\n                reorder(list.items, list.index, force);\n                return list;\n            };\n        }\n        function position(element, y) {\n            if (kendo.support.browser.msie && kendo.support.browser.version < 10) {\n                element.style.top = y + 'px';\n            } else {\n                element.style.webkitTransform = 'translateY(' + y + 'px)';\n                element.style.transform = 'translateY(' + y + 'px)';\n            }\n        }\n        function map2(callback, templates) {\n            return function (arr1, arr2) {\n                for (var i = 0, len = arr1.length; i < len; i++) {\n                    callback(arr1[i], arr2[i], templates);\n                    if (arr2[i].item) {\n                        this.trigger(ITEMCHANGE, {\n                            item: $(arr1[i]),\n                            data: arr2[i].item,\n                            ns: kendo.ui\n                        });\n                    }\n                }\n            };\n        }\n        function reshift(items, diff) {\n            var range;\n            if (diff > 0) {\n                range = items.splice(0, diff);\n                items.push.apply(items, range);\n            } else {\n                range = items.splice(diff, -diff);\n                items.unshift.apply(items, range);\n            }\n            return range;\n        }\n        function render(element, data, templates) {\n            var itemTemplate = templates.template;\n            element = $(element);\n            if (!data.item) {\n                itemTemplate = templates.placeholderTemplate;\n            }\n            this.angular('cleanup', function () {\n                return { elements: [element] };\n            });\n            element.attr('data-uid', data.item ? data.item.uid : '').attr('data-offset-index', data.index).html(itemTemplate(data.item || {}));\n            element.toggleClass(FOCUSED, data.current);\n            element.toggleClass(SELECTED, data.selected);\n            element.toggleClass('k-first', data.newGroup);\n            element.toggleClass('k-loading-item', !data.item);\n            if (data.index !== 0 && data.newGroup) {\n                $('<div class=' + GROUPITEM + '></div>').appendTo(element).html(templates.groupTemplate(data.group));\n            }\n            if (data.top !== undefined) {\n                position(element[0], data.top);\n            }\n            this.angular('compile', function () {\n                return {\n                    elements: [element],\n                    data: [{\n                            dataItem: data.item,\n                            group: data.group,\n                            newGroup: data.newGroup\n                        }]\n                };\n            });\n        }\n        function mapChangedItems(selected, itemsToMatch) {\n            var itemsLength = itemsToMatch.length;\n            var selectedLength = selected.length;\n            var dataItem;\n            var found;\n            var i, j;\n            var changed = [];\n            var unchanged = [];\n            if (selectedLength) {\n                for (i = 0; i < selectedLength; i++) {\n                    dataItem = selected[i];\n                    found = false;\n                    for (j = 0; j < itemsLength; j++) {\n                        if (dataItem === itemsToMatch[j]) {\n                            found = true;\n                            changed.push({\n                                index: i,\n                                item: dataItem\n                            });\n                            break;\n                        }\n                    }\n                    if (!found) {\n                        unchanged.push(dataItem);\n                    }\n                }\n            }\n            return {\n                changed: changed,\n                unchanged: unchanged\n            };\n        }\n        function isActivePromise(promise) {\n            return promise && promise.state() !== 'resolved';\n        }\n        var VirtualList = DataBoundWidget.extend({\n            init: function (element, options) {\n                var that = this;\n                that.bound(false);\n                that._fetching = false;\n                Widget.fn.init.call(that, element, options);\n                if (!that.options.itemHeight) {\n                    that.options.itemHeight = getDefaultItemHeight();\n                }\n                options = that.options;\n                that.element.addClass(LIST + ' ' + VIRTUALLIST).attr('role', 'listbox');\n                that.content = that.element.wrap('<div unselectable=\\'on\\' class=\\'' + CONTENT + '\\'></div>').parent();\n                that.wrapper = that.content.wrap('<div class=\\'' + WRAPPER + '\\'></div>').parent();\n                that.header = that.content.before('<div class=\\'' + HEADER + '\\'></div>').prev();\n                that.element.on('mouseenter' + VIRTUAL_LIST_NS, 'li:not(.k-loading-item)', function () {\n                    $(this).addClass(HOVER);\n                }).on('mouseleave' + VIRTUAL_LIST_NS, 'li', function () {\n                    $(this).removeClass(HOVER);\n                });\n                that._values = toArray(that.options.value);\n                that._selectedDataItems = [];\n                that._selectedIndexes = [];\n                that._rangesList = {};\n                that._promisesList = [];\n                that._optionID = kendo.guid();\n                that._templates();\n                that.setDataSource(options.dataSource);\n                that.content.on('scroll' + VIRTUAL_LIST_NS, kendo.throttle(function () {\n                    that._renderItems();\n                    that._triggerListBound();\n                }, options.delay));\n                that._selectable();\n            },\n            options: {\n                name: 'VirtualList',\n                autoBind: true,\n                delay: 100,\n                height: null,\n                listScreens: 4,\n                threshold: 0.5,\n                itemHeight: null,\n                oppositeBuffer: 1,\n                type: 'flat',\n                selectable: false,\n                value: [],\n                dataValueField: null,\n                template: '#:data#',\n                placeholderTemplate: 'loading...',\n                groupTemplate: '#:data#',\n                fixedGroupTemplate: 'fixed header template',\n                mapValueTo: 'index',\n                valueMapper: null\n            },\n            events: [\n                CHANGE,\n                CLICK,\n                LISTBOUND,\n                ITEMCHANGE,\n                ACTIVATE,\n                DEACTIVATE\n            ],\n            setOptions: function (options) {\n                Widget.fn.setOptions.call(this, options);\n                if (this._selectProxy && this.options.selectable === false) {\n                    this.element.off(CLICK, '.' + VIRTUALITEM, this._selectProxy);\n                } else if (!this._selectProxy && this.options.selectable) {\n                    this._selectable();\n                }\n                this._templates();\n                this.refresh();\n            },\n            items: function () {\n                return $(this._items);\n            },\n            destroy: function () {\n                this.wrapper.off(VIRTUAL_LIST_NS);\n                this.dataSource.unbind(CHANGE, this._refreshHandler);\n                Widget.fn.destroy.call(this);\n            },\n            setDataSource: function (source) {\n                var that = this;\n                var dataSource = source || {};\n                var value;\n                dataSource = $.isArray(dataSource) ? { data: dataSource } : dataSource;\n                dataSource = kendo.data.DataSource.create(dataSource);\n                if (that.dataSource) {\n                    that.dataSource.unbind(CHANGE, that._refreshHandler);\n                    that._clean();\n                    that.bound(false);\n                    that._deferValueSet = true;\n                    value = that.value();\n                    that.value([]);\n                    that.mute(function () {\n                        that.value(value);\n                    });\n                } else {\n                    that._refreshHandler = $.proxy(that.refresh, that);\n                }\n                that.dataSource = dataSource.bind(CHANGE, that._refreshHandler);\n                that.setDSFilter(dataSource.filter());\n                if (dataSource.view().length !== 0) {\n                    that.refresh();\n                } else if (that.options.autoBind) {\n                    dataSource.fetch();\n                }\n            },\n            skip: function () {\n                return this.dataSource.currentRangeStart();\n            },\n            _triggerListBound: function () {\n                var that = this;\n                var skip = that.skip();\n                if (that.bound() && !that._selectingValue && that._skip !== skip) {\n                    that._skip = skip;\n                    that.trigger(LISTBOUND);\n                }\n            },\n            _getValues: function (dataItems) {\n                var getter = this._valueGetter;\n                return $.map(dataItems, function (dataItem) {\n                    return getter(dataItem);\n                });\n            },\n            refresh: function (e) {\n                var that = this;\n                var action = e && e.action;\n                var isItemChange = action === 'itemchange';\n                var filtered = this.isFiltered();\n                var result;\n                if (that._mute) {\n                    return;\n                }\n                that._deferValueSet = false;\n                if (!that._fetching) {\n                    if (filtered) {\n                        that.focus(0);\n                    }\n                    that._createList();\n                    if (!action && that._values.length && !filtered && !that.options.skipUpdateOnBind) {\n                        that._selectingValue = true;\n                        that.value(that._values, true).done(function () {\n                            that.bound(true);\n                            that._selectingValue = false;\n                            that._triggerListBound();\n                        });\n                    } else {\n                        that.bound(true);\n                        that._triggerListBound();\n                    }\n                } else {\n                    if (that._renderItems) {\n                        that._renderItems(true);\n                    }\n                    that._triggerListBound();\n                }\n                if (isItemChange || action === 'remove') {\n                    result = mapChangedItems(that._selectedDataItems, e.items);\n                    if (result.changed.length) {\n                        if (isItemChange) {\n                            that.trigger('selectedItemChange', { items: result.changed });\n                        } else {\n                            that.value(that._getValues(result.unchanged));\n                        }\n                    }\n                }\n                that._fetching = false;\n            },\n            removeAt: function (position) {\n                this._selectedIndexes.splice(position, 1);\n                this._values.splice(position, 1);\n                return {\n                    position: position,\n                    dataItem: this._selectedDataItems.splice(position, 1)[0]\n                };\n            },\n            setValue: function (value) {\n                this._values = toArray(value);\n            },\n            value: function (value, _forcePrefetch) {\n                var that = this;\n                if (value === undefined) {\n                    return that._values.slice();\n                }\n                if (value === null) {\n                    value = [];\n                }\n                value = toArray(value);\n                if (!that._valueDeferred || that._valueDeferred.state() === 'resolved') {\n                    that._valueDeferred = $.Deferred();\n                }\n                var shouldClear = that.options.selectable === 'multiple' && that.select().length && value.length;\n                if (shouldClear || !value.length) {\n                    that.select(-1);\n                }\n                that._values = value;\n                if (that.bound() && !that._mute && !that._deferValueSet || _forcePrefetch) {\n                    that._prefetchByValue(value);\n                }\n                return that._valueDeferred;\n            },\n            _prefetchByValue: function (value) {\n                var that = this, dataView = that._dataView, valueGetter = that._valueGetter, mapValueTo = that.options.mapValueTo, item, match = false, forSelection = [];\n                for (var i = 0; i < value.length; i++) {\n                    for (var idx = 0; idx < dataView.length; idx++) {\n                        item = dataView[idx].item;\n                        if (item) {\n                            match = isPrimitive(item) ? value[i] === item : value[i] === valueGetter(item);\n                            if (match) {\n                                forSelection.push(dataView[idx].index);\n                            }\n                        }\n                    }\n                }\n                if (forSelection.length === value.length) {\n                    that._values = [];\n                    that.select(forSelection);\n                    return;\n                }\n                if (typeof that.options.valueMapper === 'function') {\n                    that.options.valueMapper({\n                        value: this.options.selectable === 'multiple' ? value : value[0],\n                        success: function (response) {\n                            if (mapValueTo === 'index') {\n                                that.mapValueToIndex(response);\n                            } else if (mapValueTo === 'dataItem') {\n                                that.mapValueToDataItem(response);\n                            }\n                        }\n                    });\n                } else {\n                    that.select([-1]);\n                }\n            },\n            mapValueToIndex: function (indexes) {\n                if (indexes === undefined || indexes === -1 || indexes === null) {\n                    indexes = [];\n                } else {\n                    indexes = toArray(indexes);\n                }\n                if (!indexes.length) {\n                    indexes = [-1];\n                } else {\n                    var removed = this._deselect([]).removed;\n                    if (removed.length) {\n                        this._triggerChange(removed, []);\n                    }\n                }\n                this.select(indexes);\n            },\n            mapValueToDataItem: function (dataItems) {\n                var removed, added;\n                if (dataItems === undefined || dataItems === null) {\n                    dataItems = [];\n                } else {\n                    dataItems = toArray(dataItems);\n                }\n                if (!dataItems.length) {\n                    this.select([-1]);\n                } else {\n                    removed = $.map(this._selectedDataItems, function (item, index) {\n                        return {\n                            index: index,\n                            dataItem: item\n                        };\n                    });\n                    added = $.map(dataItems, function (item, index) {\n                        return {\n                            index: index,\n                            dataItem: item\n                        };\n                    });\n                    this._selectedDataItems = dataItems;\n                    this._selectedIndexes = [];\n                    for (var i = 0; i < this._selectedDataItems.length; i++) {\n                        this._selectedIndexes.push(undefined);\n                    }\n                    this._triggerChange(removed, added);\n                    if (this._valueDeferred) {\n                        this._valueDeferred.resolve();\n                    }\n                }\n            },\n            deferredRange: function (index) {\n                var dataSource = this.dataSource;\n                var take = this.itemCount;\n                var ranges = this._rangesList;\n                var result = $.Deferred();\n                var defs = [];\n                var low = Math.floor(index / take) * take;\n                var high = Math.ceil(index / take) * take;\n                var pages = high === low ? [high] : [\n                    low,\n                    high\n                ];\n                $.each(pages, function (_, skip) {\n                    var end = skip + take;\n                    var existingRange = ranges[skip];\n                    var deferred;\n                    if (!existingRange || existingRange.end !== end) {\n                        deferred = $.Deferred();\n                        ranges[skip] = {\n                            end: end,\n                            deferred: deferred\n                        };\n                        dataSource._multiplePrefetch(skip, take, function () {\n                            deferred.resolve();\n                        });\n                    } else {\n                        deferred = existingRange.deferred;\n                    }\n                    defs.push(deferred);\n                });\n                $.when.apply($, defs).then(function () {\n                    result.resolve();\n                });\n                return result;\n            },\n            prefetch: function (indexes) {\n                var that = this, take = this.itemCount, isEmptyList = !that._promisesList.length;\n                if (!isActivePromise(that._activeDeferred)) {\n                    that._activeDeferred = $.Deferred();\n                    that._promisesList = [];\n                }\n                $.each(indexes, function (_, index) {\n                    that._promisesList.push(that.deferredRange(that._getSkip(index, take)));\n                });\n                if (isEmptyList) {\n                    $.when.apply($, that._promisesList).done(function () {\n                        that._promisesList = [];\n                        that._activeDeferred.resolve();\n                    });\n                }\n                return that._activeDeferred;\n            },\n            _findDataItem: function (view, index) {\n                var group;\n                if (this.options.type === 'group') {\n                    for (var i = 0; i < view.length; i++) {\n                        group = view[i].items;\n                        if (group.length <= index) {\n                            index = index - group.length;\n                        } else {\n                            return group[index];\n                        }\n                    }\n                }\n                return view[index];\n            },\n            _getRange: function (skip, take) {\n                return this.dataSource._findRange(skip, Math.min(skip + take, this.dataSource.total()));\n            },\n            dataItemByIndex: function (index) {\n                var take = this.itemCount;\n                var skip = this._getSkip(index, take);\n                var view = this._getRange(skip, take);\n                return this._findDataItem(view, [index - skip]);\n            },\n            selectedDataItems: function () {\n                return this._selectedDataItems.slice();\n            },\n            scrollWith: function (value) {\n                this.content.scrollTop(this.content.scrollTop() + value);\n            },\n            scrollTo: function (y) {\n                this.content.scrollTop(y);\n            },\n            scrollToIndex: function (index) {\n                this.scrollTo(index * this.options.itemHeight);\n            },\n            focus: function (candidate) {\n                var element, index, data, current, itemHeight = this.options.itemHeight, id = this._optionID, triggerEvent = true;\n                if (candidate === undefined) {\n                    current = this.element.find('.' + FOCUSED);\n                    return current.length ? current : null;\n                }\n                if (typeof candidate === 'function') {\n                    data = this.dataSource.flatView();\n                    for (var idx = 0; idx < data.length; idx++) {\n                        if (candidate(data[idx])) {\n                            candidate = idx;\n                            break;\n                        }\n                    }\n                }\n                if (candidate instanceof Array) {\n                    candidate = lastFrom(candidate);\n                }\n                if (isNaN(candidate)) {\n                    element = $(candidate);\n                    index = parseInt($(element).attr('data-offset-index'), 10);\n                } else {\n                    index = candidate;\n                    element = this._getElementByIndex(index);\n                }\n                if (index === -1) {\n                    this.element.find('.' + FOCUSED).removeClass(FOCUSED);\n                    this._focusedIndex = undefined;\n                    return;\n                }\n                if (element.length) {\n                    if (element.hasClass(FOCUSED)) {\n                        triggerEvent = false;\n                    }\n                    if (this._focusedIndex !== undefined) {\n                        current = this._getElementByIndex(this._focusedIndex);\n                        current.removeClass(FOCUSED).removeAttr('id');\n                        if (triggerEvent) {\n                            this.trigger(DEACTIVATE);\n                        }\n                    }\n                    this._focusedIndex = index;\n                    element.addClass(FOCUSED).attr('id', id);\n                    var position = this._getElementLocation(index);\n                    if (position === 'top') {\n                        this.scrollTo(index * itemHeight);\n                    } else if (position === 'bottom') {\n                        this.scrollTo(index * itemHeight + itemHeight - this._screenHeight);\n                    } else if (position === 'outScreen') {\n                        this.scrollTo(index * itemHeight);\n                    }\n                    if (triggerEvent) {\n                        this.trigger(ACTIVATE);\n                    }\n                } else {\n                    this._focusedIndex = index;\n                    this.items().removeClass(FOCUSED);\n                    this.scrollToIndex(index);\n                }\n            },\n            focusIndex: function () {\n                return this._focusedIndex;\n            },\n            focusFirst: function () {\n                this.scrollTo(0);\n                this.focus(0);\n            },\n            focusLast: function () {\n                var lastIndex = this.dataSource.total();\n                this.scrollTo(this.heightContainer.offsetHeight);\n                this.focus(lastIndex);\n            },\n            focusPrev: function () {\n                var index = this._focusedIndex;\n                var current;\n                if (!isNaN(index) && index > 0) {\n                    index -= 1;\n                    this.focus(index);\n                    current = this.focus();\n                    if (current && current.hasClass('k-loading-item')) {\n                        index += 1;\n                        this.focus(index);\n                    }\n                    return index;\n                } else {\n                    index = this.dataSource.total() - 1;\n                    this.focus(index);\n                    return index;\n                }\n            },\n            focusNext: function () {\n                var index = this._focusedIndex;\n                var lastIndex = this.dataSource.total() - 1;\n                var current;\n                if (!isNaN(index) && index < lastIndex) {\n                    index += 1;\n                    this.focus(index);\n                    current = this.focus();\n                    if (current && current.hasClass('k-loading-item')) {\n                        index -= 1;\n                        this.focus(index);\n                    }\n                    return index;\n                } else {\n                    index = 0;\n                    this.focus(index);\n                    return index;\n                }\n            },\n            _triggerChange: function (removed, added) {\n                removed = removed || [];\n                added = added || [];\n                if (removed.length || added.length) {\n                    this.trigger(CHANGE, {\n                        removed: removed,\n                        added: added\n                    });\n                }\n            },\n            select: function (candidate) {\n                var that = this, indices, singleSelection = that.options.selectable !== 'multiple', prefetchStarted = isActivePromise(that._activeDeferred), filtered = this.isFiltered(), isAlreadySelected, deferred, result, removed = [];\n                if (candidate === undefined) {\n                    return that._selectedIndexes.slice();\n                }\n                if (!that._selectDeferred || that._selectDeferred.state() === 'resolved') {\n                    that._selectDeferred = $.Deferred();\n                }\n                indices = that._getIndecies(candidate);\n                isAlreadySelected = singleSelection && !filtered && lastFrom(indices) === lastFrom(this._selectedIndexes);\n                removed = that._deselectCurrentValues(indices);\n                if (removed.length || !indices.length || isAlreadySelected) {\n                    that._triggerChange(removed);\n                    if (that._valueDeferred) {\n                        that._valueDeferred.resolve();\n                    }\n                    return that._selectDeferred.resolve().promise();\n                }\n                if (indices.length === 1 && indices[0] === -1) {\n                    indices = [];\n                }\n                result = that._deselect(indices);\n                removed = result.removed;\n                indices = result.indices;\n                if (singleSelection) {\n                    prefetchStarted = false;\n                    if (indices.length) {\n                        indices = [lastFrom(indices)];\n                    }\n                }\n                var done = function () {\n                    var added = that._select(indices);\n                    that.focus(indices);\n                    that._triggerChange(removed, added);\n                    if (that._valueDeferred) {\n                        that._valueDeferred.resolve();\n                    }\n                    that._selectDeferred.resolve();\n                };\n                deferred = that.prefetch(indices);\n                if (!prefetchStarted) {\n                    if (deferred) {\n                        deferred.done(done);\n                    } else {\n                        done();\n                    }\n                }\n                return that._selectDeferred.promise();\n            },\n            bound: function (bound) {\n                if (bound === undefined) {\n                    return this._listCreated;\n                }\n                this._listCreated = bound;\n            },\n            mute: function (callback) {\n                this._mute = true;\n                proxy(callback(), this);\n                this._mute = false;\n            },\n            setDSFilter: function (filter) {\n                this._lastDSFilter = $.extend({}, filter);\n            },\n            isFiltered: function () {\n                if (!this._lastDSFilter) {\n                    this.setDSFilter(this.dataSource.filter());\n                }\n                return !kendo.data.Query.compareFilters(this.dataSource.filter(), this._lastDSFilter);\n            },\n            skipUpdate: $.noop,\n            _getElementByIndex: function (index) {\n                return this.items().filter(function (idx, element) {\n                    return index === parseInt($(element).attr('data-offset-index'), 10);\n                });\n            },\n            _getElementByDataItem: function (dataItem) {\n                var dataView = this._dataView, valueGetter = this._valueGetter, element, match;\n                for (var i = 0; i < dataView.length; i++) {\n                    match = dataView[i].item && isPrimitive(dataView[i].item) ? dataView[i].item === dataItem : valueGetter(dataView[i].item) === valueGetter(dataItem);\n                    if (match) {\n                        element = dataView[i];\n                        break;\n                    }\n                }\n                return element ? this._getElementByIndex(element.index) : $();\n            },\n            _clean: function () {\n                this.result = undefined;\n                this._lastScrollTop = undefined;\n                this._skip = undefined;\n                $(this.heightContainer).remove();\n                this.heightContainer = undefined;\n                this.element.empty();\n            },\n            _height: function () {\n                var hasData = !!this.dataSource.view().length, height = this.options.height, itemHeight = this.options.itemHeight, total = this.dataSource.total();\n                if (!hasData) {\n                    height = 0;\n                } else if (height / itemHeight > total) {\n                    height = total * itemHeight;\n                }\n                return height;\n            },\n            setScreenHeight: function () {\n                var height = this._height();\n                this.content.height(height);\n                this._screenHeight = height;\n            },\n            screenHeight: function () {\n                return this._screenHeight;\n            },\n            _getElementLocation: function (index) {\n                var scrollTop = this.content.scrollTop(), screenHeight = this._screenHeight, itemHeight = this.options.itemHeight, yPosition = index * itemHeight, yDownPostion = yPosition + itemHeight, screenEnd = scrollTop + screenHeight, position;\n                if (yPosition === scrollTop - itemHeight || yDownPostion > scrollTop && yPosition < scrollTop) {\n                    position = 'top';\n                } else if (yPosition === screenEnd || yPosition < screenEnd && screenEnd < yDownPostion) {\n                    position = 'bottom';\n                } else if (yPosition >= scrollTop && yPosition <= scrollTop + (screenHeight - itemHeight)) {\n                    position = 'inScreen';\n                } else {\n                    position = 'outScreen';\n                }\n                return position;\n            },\n            _templates: function () {\n                var options = this.options;\n                var templates = {\n                    template: options.template,\n                    placeholderTemplate: options.placeholderTemplate,\n                    groupTemplate: options.groupTemplate,\n                    fixedGroupTemplate: options.fixedGroupTemplate\n                };\n                for (var key in templates) {\n                    if (typeof templates[key] !== 'function') {\n                        templates[key] = kendo.template(templates[key] || '');\n                    }\n                }\n                this.templates = templates;\n            },\n            _generateItems: function (element, count) {\n                var items = [], item, itemHeight = this.options.itemHeight + 'px';\n                while (count-- > 0) {\n                    item = document.createElement('li');\n                    item.tabIndex = -1;\n                    item.className = VIRTUALITEM + ' ' + ITEM;\n                    item.setAttribute('role', 'option');\n                    item.style.height = itemHeight;\n                    item.style.minHeight = itemHeight;\n                    element.appendChild(item);\n                    items.push(item);\n                }\n                return items;\n            },\n            _saveInitialRanges: function () {\n                var ranges = this.dataSource._ranges;\n                var deferred = $.Deferred();\n                deferred.resolve();\n                this._rangesList = {};\n                for (var i = 0; i < ranges.length; i++) {\n                    this._rangesList[ranges[i].start] = {\n                        end: ranges[i].end,\n                        deferred: deferred\n                    };\n                }\n            },\n            _createList: function () {\n                var that = this, content = that.content.get(0), options = that.options, dataSource = that.dataSource;\n                if (that.bound()) {\n                    that._clean();\n                }\n                that._saveInitialRanges();\n                that._buildValueGetter();\n                that.setScreenHeight();\n                that.itemCount = getItemCount(that._screenHeight, options.listScreens, options.itemHeight);\n                if (that.itemCount > dataSource.total()) {\n                    that.itemCount = dataSource.total();\n                }\n                that._items = that._generateItems(that.element[0], that.itemCount);\n                that._setHeight(options.itemHeight * dataSource.total());\n                that.options.type = (dataSource.group() || []).length ? 'group' : 'flat';\n                if (that.options.type === 'flat') {\n                    that.header.hide();\n                } else {\n                    that.header.show();\n                }\n                that.getter = that._getter(function () {\n                    that._renderItems(true);\n                });\n                that._onScroll = function (scrollTop, force) {\n                    var getList = that._listItems(that.getter);\n                    return that._fixedHeader(scrollTop, getList(scrollTop, force));\n                };\n                that._renderItems = that._whenChanged(scrollCallback(content, that._onScroll), syncList(that._reorderList(that._items, $.proxy(render, that))));\n                that._renderItems();\n                that._calculateGroupPadding(that._screenHeight);\n            },\n            _setHeight: function (height) {\n                var currentHeight, heightContainer = this.heightContainer;\n                if (!heightContainer) {\n                    heightContainer = this.heightContainer = appendChild(this.content[0], HEIGHTCONTAINER);\n                } else {\n                    currentHeight = heightContainer.offsetHeight;\n                }\n                if (height !== currentHeight) {\n                    heightContainer.innerHTML = '';\n                    while (height > 0) {\n                        var padHeight = Math.min(height, 250000);\n                        appendChild(heightContainer).style.height = padHeight + 'px';\n                        height -= padHeight;\n                    }\n                }\n            },\n            _getter: function () {\n                var lastRequestedRange = null, dataSource = this.dataSource, lastRangeStart = dataSource.skip(), type = this.options.type, pageSize = this.itemCount, flatGroups = {};\n                if (dataSource.pageSize() < pageSize) {\n                    this.mute(function () {\n                        dataSource.pageSize(pageSize);\n                    });\n                }\n                return function (index, rangeStart) {\n                    var that = this;\n                    if (!dataSource.inRange(rangeStart, pageSize)) {\n                        if (lastRequestedRange !== rangeStart) {\n                            lastRequestedRange = rangeStart;\n                            lastRangeStart = rangeStart;\n                            if (that._getterDeferred) {\n                                that._getterDeferred.reject();\n                            }\n                            that._getterDeferred = that.deferredRange(rangeStart);\n                            that._getterDeferred.then(function () {\n                                var firstItemIndex = that._indexConstraint(that.content[0].scrollTop);\n                                that._getterDeferred = null;\n                                if (rangeStart <= firstItemIndex && firstItemIndex <= rangeStart + pageSize) {\n                                    that._fetching = true;\n                                    dataSource.range(rangeStart, pageSize);\n                                }\n                            });\n                        }\n                        return null;\n                    } else {\n                        if (lastRangeStart !== rangeStart) {\n                            this.mute(function () {\n                                dataSource.range(rangeStart, pageSize);\n                                lastRangeStart = rangeStart;\n                            });\n                        }\n                        var result;\n                        if (type === 'group') {\n                            if (!flatGroups[rangeStart]) {\n                                var flatGroup = flatGroups[rangeStart] = [];\n                                var groups = dataSource.view();\n                                for (var i = 0, len = groups.length; i < len; i++) {\n                                    var group = groups[i];\n                                    for (var j = 0, groupLength = group.items.length; j < groupLength; j++) {\n                                        flatGroup.push({\n                                            item: group.items[j],\n                                            group: group.value\n                                        });\n                                    }\n                                }\n                            }\n                            result = flatGroups[rangeStart][index - rangeStart];\n                        } else {\n                            result = dataSource.view()[index - rangeStart];\n                        }\n                        return result;\n                    }\n                };\n            },\n            _fixedHeader: function (scrollTop, list) {\n                var group = this.currentVisibleGroup, itemHeight = this.options.itemHeight, firstVisibleDataItemIndex = Math.floor((scrollTop - list.top) / itemHeight), firstVisibleDataItem = list.items[firstVisibleDataItemIndex];\n                if (firstVisibleDataItem && firstVisibleDataItem.item) {\n                    var firstVisibleGroup = firstVisibleDataItem.group;\n                    if (firstVisibleGroup !== group) {\n                        this.header[0].innerHTML = firstVisibleGroup || '';\n                        this.currentVisibleGroup = firstVisibleGroup;\n                    }\n                }\n                return list;\n            },\n            _itemMapper: function (item, index, value) {\n                var listType = this.options.type, itemHeight = this.options.itemHeight, currentIndex = this._focusedIndex, selected = false, current = false, newGroup = false, group = null, match = false, valueGetter = this._valueGetter;\n                if (listType === 'group') {\n                    if (item) {\n                        newGroup = index === 0 || this._currentGroup && this._currentGroup !== item.group;\n                        this._currentGroup = item.group;\n                    }\n                    group = item ? item.group : null;\n                    item = item ? item.item : null;\n                }\n                if (!this.isFiltered() && value.length && item) {\n                    for (var i = 0; i < value.length; i++) {\n                        match = isPrimitive(item) ? value[i] === item : value[i] === valueGetter(item);\n                        if (match) {\n                            value.splice(i, 1);\n                            selected = true;\n                            break;\n                        }\n                    }\n                }\n                if (currentIndex === index) {\n                    current = true;\n                }\n                return {\n                    item: item ? item : null,\n                    group: group,\n                    newGroup: newGroup,\n                    selected: selected,\n                    current: current,\n                    index: index,\n                    top: index * itemHeight\n                };\n            },\n            _range: function (index) {\n                var itemCount = this.itemCount, value = this._values.slice(), items = [], item;\n                this._view = {};\n                this._currentGroup = null;\n                for (var i = index, length = index + itemCount; i < length; i++) {\n                    item = this._itemMapper(this.getter(i, index), i, value);\n                    items.push(item);\n                    this._view[item.index] = item;\n                }\n                this._dataView = items;\n                return items;\n            },\n            _getDataItemsCollection: function (scrollTop, lastScrollTop) {\n                var items = this._range(this._listIndex(scrollTop, lastScrollTop));\n                return {\n                    index: items.length ? items[0].index : 0,\n                    top: items.length ? items[0].top : 0,\n                    items: items\n                };\n            },\n            _listItems: function () {\n                var screenHeight = this._screenHeight, options = this.options;\n                var theValidator = listValidator(options, screenHeight);\n                return $.proxy(function (value, force) {\n                    var result = this.result, lastScrollTop = this._lastScrollTop;\n                    if (force || !result || !theValidator(result, value, lastScrollTop)) {\n                        result = this._getDataItemsCollection(value, lastScrollTop);\n                    }\n                    this._lastScrollTop = value;\n                    this.result = result;\n                    return result;\n                }, this);\n            },\n            _whenChanged: function (getter, callback) {\n                var current;\n                return function (force) {\n                    var theNew = getter(force);\n                    if (theNew !== current) {\n                        current = theNew;\n                        callback(theNew, force);\n                    }\n                };\n            },\n            _reorderList: function (list, reorder) {\n                var that = this;\n                var length = list.length;\n                var currentOffset = -Infinity;\n                reorder = $.proxy(map2(reorder, this.templates), this);\n                return function (list2, offset, force) {\n                    var diff = offset - currentOffset;\n                    var range, range2;\n                    if (force || Math.abs(diff) >= length) {\n                        range = list;\n                        range2 = list2;\n                    } else {\n                        range = reshift(list, diff);\n                        range2 = diff > 0 ? list2.slice(-diff) : list2.slice(0, -diff);\n                    }\n                    reorder(range, range2, that.bound());\n                    currentOffset = offset;\n                };\n            },\n            _bufferSizes: function () {\n                var options = this.options;\n                return bufferSizes(this._screenHeight, options.listScreens, options.oppositeBuffer);\n            },\n            _indexConstraint: function (position) {\n                var itemCount = this.itemCount, itemHeight = this.options.itemHeight, total = this.dataSource.total();\n                return Math.min(Math.max(total - itemCount, 0), Math.max(0, Math.floor(position / itemHeight)));\n            },\n            _listIndex: function (scrollTop, lastScrollTop) {\n                var buffers = this._bufferSizes(), position;\n                position = scrollTop - (scrollTop > lastScrollTop ? buffers.down : buffers.up);\n                return this._indexConstraint(position);\n            },\n            _selectable: function () {\n                if (this.options.selectable) {\n                    this._selectProxy = $.proxy(this, '_clickHandler');\n                    this.element.on(CLICK + VIRTUAL_LIST_NS, '.' + VIRTUALITEM, this._selectProxy);\n                }\n            },\n            getElementIndex: function (element) {\n                if (!(element instanceof jQuery)) {\n                    return undefined;\n                }\n                return parseInt(element.attr('data-offset-index'), 10);\n            },\n            _getIndecies: function (candidate) {\n                var result = [], data;\n                if (typeof candidate === 'function') {\n                    data = this.dataSource.flatView();\n                    for (var idx = 0; idx < data.length; idx++) {\n                        if (candidate(data[idx])) {\n                            result.push(idx);\n                            break;\n                        }\n                    }\n                }\n                if (typeof candidate === 'number') {\n                    result.push(candidate);\n                }\n                var elementIndex = this.getElementIndex(candidate);\n                if (!isNaN(elementIndex)) {\n                    result.push(elementIndex);\n                }\n                if (candidate instanceof Array) {\n                    result = candidate;\n                }\n                return result;\n            },\n            _deselect: function (indices) {\n                var removed = [], selectedIndex, dataItem, selectedIndexes = this._selectedIndexes, selectedDataItems = this._selectedDataItems, position = 0, selectable = this.options.selectable, removedindexesCounter = 0, valueGetter = this._valueGetter, item, match, result = null;\n                indices = indices.slice();\n                if (selectable === true || !indices.length) {\n                    for (var idx = 0; idx < selectedIndexes.length; idx++) {\n                        if (selectedIndexes[idx] !== undefined) {\n                            this._getElementByIndex(selectedIndexes[idx]).removeClass(SELECTED);\n                        } else if (selectedDataItems[idx]) {\n                            this._getElementByDataItem(selectedDataItems[idx]).removeClass(SELECTED);\n                        }\n                        removed.push({\n                            index: selectedIndexes[idx],\n                            position: idx,\n                            dataItem: selectedDataItems[idx]\n                        });\n                    }\n                    this._values = [];\n                    this._selectedDataItems = [];\n                    this._selectedIndexes = [];\n                } else if (selectable === 'multiple') {\n                    for (var i = 0; i < indices.length; i++) {\n                        result = null;\n                        position = $.inArray(indices[i], selectedIndexes);\n                        dataItem = this.dataItemByIndex(indices[i]);\n                        if (position === -1 && dataItem) {\n                            for (var j = 0; j < selectedDataItems.length; j++) {\n                                match = isPrimitive(dataItem) ? selectedDataItems[j] === dataItem : valueGetter(selectedDataItems[j]) === valueGetter(dataItem);\n                                if (match) {\n                                    item = this._getElementByIndex(indices[i]);\n                                    result = this._deselectSingleItem(item, j, indices[i], removedindexesCounter);\n                                }\n                            }\n                        } else {\n                            selectedIndex = selectedIndexes[position];\n                            if (selectedIndex !== undefined) {\n                                item = this._getElementByIndex(selectedIndex);\n                                result = this._deselectSingleItem(item, position, selectedIndex, removedindexesCounter);\n                            }\n                        }\n                        if (result) {\n                            indices.splice(i, 1);\n                            removed.push(result);\n                            removedindexesCounter++;\n                            i--;\n                        }\n                    }\n                }\n                return {\n                    indices: indices,\n                    removed: removed\n                };\n            },\n            _deselectSingleItem: function (item, position, selectedIndex, removedindexesCounter) {\n                var dataItem;\n                if (!item.hasClass('k-state-selected')) {\n                    return;\n                }\n                item.removeClass(SELECTED);\n                this._values.splice(position, 1);\n                this._selectedIndexes.splice(position, 1);\n                dataItem = this._selectedDataItems.splice(position, 1)[0];\n                return {\n                    index: selectedIndex,\n                    position: position + removedindexesCounter,\n                    dataItem: dataItem\n                };\n            },\n            _deselectCurrentValues: function (indices) {\n                var children = this.element[0].children;\n                var value, index, position;\n                var values = this._values;\n                var removed = [];\n                var idx = 0;\n                var j;\n                if (this.options.selectable !== 'multiple' || !this.isFiltered()) {\n                    return [];\n                }\n                if (indices[0] === -1) {\n                    $(children).removeClass('k-state-selected');\n                    removed = $.map(this._selectedDataItems.slice(0), function (dataItem, idx) {\n                        return {\n                            dataItem: dataItem,\n                            position: idx\n                        };\n                    });\n                    this._selectedIndexes = [];\n                    this._selectedDataItems = [];\n                    this._values = [];\n                    return removed;\n                }\n                for (; idx < indices.length; idx++) {\n                    position = -1;\n                    index = indices[idx];\n                    value = this._valueGetter(this.dataItemByIndex(index));\n                    for (j = 0; j < values.length; j++) {\n                        if (value == values[j]) {\n                            position = j;\n                            break;\n                        }\n                    }\n                    if (position > -1) {\n                        removed.push(this.removeAt(position));\n                        $(children[index]).removeClass('k-state-selected');\n                    }\n                }\n                return removed;\n            },\n            _getSkip: function (index, take) {\n                var page = index < take ? 1 : Math.floor(index / take) + 1;\n                return (page - 1) * take;\n            },\n            _select: function (indexes) {\n                var that = this, singleSelection = this.options.selectable !== 'multiple', dataSource = this.dataSource, dataItem, oldSkip, take = this.itemCount, valueGetter = this._valueGetter, added = [];\n                if (singleSelection) {\n                    that._selectedIndexes = [];\n                    that._selectedDataItems = [];\n                    that._values = [];\n                }\n                oldSkip = dataSource.skip();\n                $.each(indexes, function (_, index) {\n                    var skip = that._getSkip(index, take);\n                    that.mute(function () {\n                        dataSource.range(skip, take);\n                        dataItem = that._findDataItem(dataSource.view(), [index - skip]);\n                        that._selectedIndexes.push(index);\n                        that._selectedDataItems.push(dataItem);\n                        that._values.push(isPrimitive(dataItem) ? dataItem : valueGetter(dataItem));\n                        added.push({\n                            index: index,\n                            dataItem: dataItem\n                        });\n                        that._getElementByIndex(index).addClass(SELECTED);\n                        dataSource.range(oldSkip, take);\n                    });\n                });\n                return added;\n            },\n            _clickHandler: function (e) {\n                var item = $(e.currentTarget);\n                if (!e.isDefaultPrevented() && item.attr('data-uid')) {\n                    this.trigger(CLICK, { item: item });\n                }\n            },\n            _buildValueGetter: function () {\n                this._valueGetter = kendo.getter(this.options.dataValueField);\n            },\n            _calculateGroupPadding: function (height) {\n                var firstItem = this.items().first(), groupHeader = this.header, padding = 0;\n                if (groupHeader[0] && groupHeader[0].style.display !== 'none') {\n                    if (height !== 'auto') {\n                        padding = kendo.support.scrollbar();\n                    }\n                    padding += parseFloat(firstItem.css('border-right-width'), 10) + parseFloat(firstItem.children('.k-group').css('right'), 10);\n                    groupHeader.css('padding-right', padding);\n                }\n            }\n        });\n        kendo.ui.VirtualList = VirtualList;\n        kendo.ui.plugin(VirtualList);\n    }(window.kendo.jQuery));\n    return window.kendo;\n}, typeof define == 'function' && define.amd ? define : function (a1, a2, a3) {\n    (a3 || a2)();\n}));"],"sourceRoot":"/source/"}