@progress/kendo-ui/umd/kendo.virtuallist.min.js

This package is part of the [Kendo UI for jQuery](http://www.telerik.com/kendo-ui) suite.

!function(e){"function"==typeof define&&define.amd?define(["kendo.data.min"],e):e()}((function(){!function(e,t){var i=window.kendo,s=i.ui,n=i.htmlEncode,r=s.Widget,a=s.DataBoundWidget,l=/^\d+(\.\d+)?%$/i,o="k-list-item",u="k-table-row",h="k-list-item-group-label",c="k-selected",d="k-focus",f="k-hover",p="change",m="click",g="listBound",_="itemChange",v="activate",I="deactivate",x=".k-table-group-row",b=".VirtualList";function D(e){return e[e.length-1]}function k(e){return e instanceof Array?e:[e]}function y(e){return"string"==typeof e||"number"==typeof e||"boolean"==typeof e}function S(e,t,i){var s=document.createElement(i||"div");return t&&(s.className=t),e.appendChild(s),s}function C(i,s,n){var r=n.template,a=this.options.columns&&this.options.columns.length,o=s.index%2==1?"k-table-alt-row":"";i=e(i),s.item||(r=n.placeholderTemplate),0===s.index&&this.header&&s.group&&this.header.html(n.fixedGroupTemplate(s.group)),this.angular("cleanup",(function(){return{elements:[i]}})),i.attr("data-uid",s.item?s.item.uid:"").attr("data-offset-index",s.index),a&&s.item?(o.length>0?i.addClass(o):i.removeClass("k-table-alt-row"),i.html(function(e,t,i){for(var s="",n=0;n<e.columns.length;n++){var r=e.columns[n].width,a=parseInt(r,10),o="";r&&(o+="style='width:",o+=a,o+=l.test(r)?"%":"px",o+=";'"),s+="<span class='k-table-td' "+o+">",s+=i["column"+n](t),s+="</span>"}return s}(this.options,s.item,n))):(i.find("."+h).remove(),i.find(".k-list-item-text").html(r(s.item||{}))),i.toggleClass(d,s.current),i.toggleClass(c,s.selected),i.toggleClass("k-first",s.newGroup),i.toggleClass("k-last",s.isLastGroupedItem),i.toggleClass("k-loading-item",!s.item),0!==s.index&&s.newGroup?a?e('<span class="k-table-td k-table-group-td"><span>'+n.groupTemplate(s.group)+"</span></span>").appendTo(i):e("<div class="+h+"></div>").appendTo(i).html(n.groupTemplate(s.group)):s.group&&a&&i.append(e('<span class="k-table-td k-table-spacer-td"></span>')),s.top!==t&&function(e,t){e.style.webkitTransform="translateY("+t+"px)",e.style.transform="translateY("+t+"px)"}(i[0],s.top),this.angular("compile",(function(){return{elements:[i],data:[{dataItem:s.item,group:s.group,newGroup:s.newGroup}]}}))}function w(e){return e&&"resolved"!==e.state()}var T=a.extend({init:function(t,s){var n,a,l,o=this,u=s.columns&&s.columns.length?"k-table-body k-table-scroller":"k-list-content k-virtual-content";if(o.bound(!1),o._fetching=!1,r.fn.init.call(o,t,s),o.options.itemHeight||(o.options.itemHeight=(n=s.listSize,(l=e('<div class="k-list '+n+' k-virtual-list"><div class="k-list-content k-virtual-content"><ul class="k-list-ul"><li class="k-list-item"><span 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t,i=this,s=e&&e.action,n="itemchange"===s,r=this.isFiltered();i._mute||(i._deferValueSet=!1,i._fetching?(i._renderItems&&i._renderItems(!0),i._triggerListBound()):(r&&i.focus(0),i._createList(),s||!i._values.length||r||i.options.skipUpdateOnBind||i._emptySearch?(i.bound(!0),i._highlightSelectedItems(),i._triggerListBound()):(i._selectingValue=!0,i.bound(!0),i.value(i._values,!0).done((function(){i._selectingValue=!1,i._triggerListBound()})))),(n||"remove"===s)&&(t=function(e,t){var i,s,n,r,a=t.length,l=e.length,o=[],u=[];if(l)for(n=0;n<l;n++){for(i=e[n],s=!1,r=0;r<a;r++)if(i===t[r]){s=!0,o.push({index:n,item:i});break}s||u.push(i)}return{changed:o,unchanged:u}}(i._selectedDataItems,e.items)).changed.length&&(n?i.trigger("selectedItemChange",{items:t.changed}):i.value(i._getValues(t.unchanged))),i._fetching=!1)},removeAt:function(e){var t=this._values.splice(e,1)[0];return{position:e,dataItem:this._removeSelectedDataItem(t)}},_removeSelectedDataItem:function(e){var t=this,i=t._valueGetter;for(var s in t._selectedDataItems)if(i(t._selectedDataItems[s])===e)return t._selectedIndexes.splice(s,1),t._selectedDataItems.splice(s,1)[0]},setValue:function(e){this._values=k(e)},value:function(i,s){var n=this;return i===t?n._values.slice():(null===i&&(i=[]),i=k(i),n._valueDeferred&&"resolved"!==n._valueDeferred.state()||(n._valueDeferred=e.Deferred()),!("multiple"===n.options.selectable&&n.select().length&&i.length)&&i.length||n.select(-1),n._values=i,(n.bound()&&!n._mute&&!n._deferValueSet||s)&&n._prefetchByValue(i),n._valueDeferred)},_checkValuesOrder:function(e){if(this._removedAddedIndexes&&this._removedAddedIndexes.length===e.length){var t=this._removedAddedIndexes.slice();return this._removedAddedIndexes=null,t}return e},_prefetchByValue:function(e){for(var t,i=this,s=i._dataView,n=i._valueGetter,r=i.options.mapValueTo,a=[],l=0;l<e.length;l++)for(var o=0;o<s.length;o++)(t=s[o].item)&&(y(t)?e[l]===t:e[l]===n(t))&&a.push(s[o].index);if(a.length===e.length)return i._values=[],void i.select(a);"function"==typeof i.options.valueMapper?i.options.valueMapper({value:"multiple"===this.options.selectable?e:e[0],success:function(e){"index"===r?i.mapValueToIndex(e):"dataItem"===r&&i.mapValueToDataItem(e)}}):i.value()[0]?(i._selectingValue=!1,i._triggerListBound()):i.select([-1])},mapValueToIndex:function(e){if((e=e===t||-1===e||null===e?[]:k(e)).length){var i=this._deselect([]).removed;i.length&&this._triggerChange(i,[])}else e=[-1];this.select(e)},mapValueToDataItem:function(i){var s,n;if((i=i===t||null===i?[]:k(i)).length){s=e.map(this._selectedDataItems,(function(e,t){return{index:t,dataItem:e}})),n=e.map(i,(function(e,t){return{index:t,dataItem:e}})),this._selectedDataItems=i,this._selectedIndexes=[];for(var r=0;r<this._selectedDataItems.length;r++){var a=this._getElementByDataItem(this._selectedDataItems[r]);this._selectedIndexes.push(this._getIndecies(a)[0]),a.addClass(c)}this._triggerChange(s,n),this._valueDeferred&&this._valueDeferred.resolve()}else this.select([-1])},deferredRange:function(t){var i=this.dataSource,s=this.itemCount,n=this._rangesList,r=e.Deferred(),a=[],l=Math.floor(t/s)*s,o=Math.ceil(t/s)*s,u=o===l?[o]:[l,o];return e.each(u,(function(t,r){var l,o=r+s,u=n[r];u&&u.end===o?l=u.deferred:(l=e.Deferred(),n[r]={end:o,deferred:l},i._multiplePrefetch(r,s,(function(){l.resolve()}))),a.push(l)})),e.when.apply(e,a).then((function(){r.resolve()})),r},prefetch:function(t){var i=this,s=this.itemCount,n=!i._promisesList.length;return w(i._activeDeferred)||(i._activeDeferred=e.Deferred(),i._promisesList=[]),e.each(t,(function(e,t){i._promisesList.push(i.deferredRange(i._getSkip(t,s)))})),n&&e.when.apply(e,i._promisesList).done((function(){i._promisesList=[],i._activeDeferred.resolve()})),i._activeDeferred},_findDataItem:function(e,t){var i;if("group"===this.options.type)for(var s=0;s<e.length;s++){if(!((i=e[s].items).length<=t))return i[t];t-=i.length}return e[t]},_getRange:function(e,t){return this.dataSource._findRange(e,Math.min(e+t,this.dataSource.total()))},dataItemByIndex:function(t){var s=this,n=s.itemCount,r=s._getSkip(t,n),a=this._getRange(r,n);return s._getRange(r,n).length?("group"===s.options.type&&(i.ui.progress(e(s.wrapper),!0),s.mute((function(){s.dataSource.range(r,n,(function(){i.ui.progress(e(s.wrapper),!1)})),a=s.dataSource.view()}))),s._findDataItem(a,[t-r])):null},selectedDataItems:function(){return this._selectedDataItems.slice()},scrollWith:function(e){this.content.scrollTop(this.content.scrollTop()+e)},scrollTo:function(e){this.content.scrollTop(e)},scrollToIndex:function(e){this.scrollTo(e*this.options.itemHeight)},focus:function(i){var s,n,r,a,l=this.options.itemHeight,o=this._optionID,u=!0;if(i===t)return(a=this.element.find(".k-focus")).length?a:null;if("function"==typeof i){r=this.dataSource.flatView();for(var h=0;h<r.length;h++)if(i(r[h])){i=h;break}}if(i instanceof Array&&(i=D(i)),isNaN(i)?(s=e(i),n=parseInt(e(s).attr("data-offset-index"),10)):(n=i,s=this._getElementByIndex(n)),-1===n)return this.element.find(".k-focus").removeClass(d),void(this._focusedIndex=t);if(s.length){s.hasClass(d)&&(u=!1),this._focusedIndex!==t&&((a=this._getElementByIndex(this._focusedIndex)).removeClass(d).removeAttr("id"),u&&this.trigger(I)),this._focusedIndex=n,s.addClass(d).attr("id",o);var c=this._getElementLocation(n);"top"===c?this.scrollTo(n*l):"bottom"===c?this.scrollTo(n*l+l-this._screenHeight):"outScreen"===c&&this.scrollTo(n*l),u&&this.trigger(v)}else this._focusedIndex=n,this.items().removeClass(d),this.scrollToIndex(n)},focusIndex:function(){return this._focusedIndex},focusFirst:function(){this.scrollTo(0),this.focus(0)},focusLast:function(){var e=this.dataSource.total();this.scrollTo(this.heightContainer.offsetHeight),this.focus(e-1)},focusPrev:function(){var e,t=this._focusedIndex;return!isNaN(t)&&t>0?(t-=1,this.focus(t),(e=this.focus())&&e.hasClass("k-loading-item")&&(t+=1,this.focus(t)),t):(t=this.dataSource.total()-1,this.focus(t),t)},focusNext:function(){var e,t=this._focusedIndex,i=this.dataSource.total()-1;return!isNaN(t)&&t<i?(t+=1,this.focus(t),(e=this.focus())&&e.hasClass("k-loading-item")&&(t-=1,this.focus(t)),t):(t=0,this.focus(t),t)},_triggerChange:function(e,t){t=t||[],((e=e||[]).length||t.length)&&this.trigger(p,{removed:e,added:t})},select:function(i){var s,n,r,a,l,o=this,u="multiple"!==o.options.selectable,h=w(o._activeDeferred),c=this.isFiltered(),d=[];if(i===t)return o._selectedIndexes.slice();if(o._selectDeferred&&"resolved"!==o._selectDeferred.state()||(o._selectDeferred=e.Deferred()),s=o._getIndecies(i),r=u&&!c&&D(s)===D(this._selectedIndexes),(d=o._deselectCurrentValues(s)).length||!s.length||r)return o._triggerChange(d),o._valueDeferred&&o._valueDeferred.resolve().promise(),o._selectDeferred.resolve().promise();1===s.length&&-1===s[0]&&(s=[]),n=s,l=o._deselect(s),d=l.removed,s=l.indices,u&&(h=!1,s.length&&(s=[D(s)]));var f=function(){var e=o._select(s);(n.length===s.length||u)&&o.focus(s),o._triggerChange(d,e),o._valueDeferred&&o._valueDeferred.resolve(),o._selectDeferred.resolve()};return a=o.prefetch(s),h||(a?a.done(f):f()),o._selectDeferred.promise()},bound:function(e){if(e===t)return this._listCreated;this._listCreated=e},mute:function(e){this._mute=!0,e(),this._mute=!1},setDSFilter:function(t){this._lastDSFilter=e.extend({},t)},isFiltered:function(){return this._lastDSFilter||this.setDSFilter(this.dataSource.filter()),!i.data.Query.compareFilters(this.dataSource.filter(),this._lastDSFilter)},skipUpdate:e.noop,_getElementByIndex:function(t){return this.items().filter((function(i,s){return t===parseInt(e(s).attr("data-offset-index"),10)}))},_getElementByDataItem:function(t){for(var i,s=this._dataView,n=this._valueGetter,r=0;r<s.length;r++)if(s[r].item&&y(s[r].item)?s[r].item===t:s[r].item&&t&&n(s[r].item)==n(t)){i=s[r];break}return i?this._getElementByIndex(i.index):e()},_clean:function(){this.result=t,this._lastScrollTop=t,this._skip=t,e(this.heightContainer).remove(),this.heightContainer=t,this.element.empty()},_height:function(){var e=!!this.dataSource.view().length,t=this.options.height,i=this.options.itemHeight,s=this.dataSource.total();return e?t/i>s&&(t=s*i):t=0,t},setScreenHeight:function(){var e=this._height();this.content.height(e),this._screenHeight=e},screenHeight:function(){return this._screenHeight},_getElementLocation:function(e){var t=this.content.scrollTop(),i=this._screenHeight,s=this.options.itemHeight,n=e*s,r=n+s,a=t+i;return n===t-s||r>t&&n<t?"top":n===a||n<a&&a<r?"bottom":n>=t&&n<=t+(i-s)?"inScreen":"outScreen"},_templates:function(){var e=this.options,t={template:e.template,placeholderTemplate:e.placeholderTemplate,groupTemplate:e.groupTemplate,fixedGroupTemplate:e.fixedGroupTemplate};for(var s in e.columns&&e.columns.forEach((function(e,s){var r=e.field?e.field.toString():"text";t["column"+s]=e.template||function(e){return n(i.getter(r)(e))}})),t)"function"!=typeof t[s]&&(t[s]=i.template(t[s]||""));this.templates=t},_generateItems:function(e,t){for(var i,s,n=[],r=this.options.itemHeight+"px",a=this.options.columns&&this.options.columns.length?u:o;t-- >0;)(s=document.createElement("span")).className="k-list-item-text",(i=document.createElement("li")).tabIndex=-1,i.className=a,i.setAttribute("role","option"),i.style.height=r,i.style.minHeight=r,i.appendChild(s),e.appendChild(i),n.push(i);return n},_saveInitialRanges:function(){var t=this.dataSource._ranges,i=e.Deferred();i.resolve(),this._rangesList={};for(var s=0;s<t.length;s++)this._rangesList[t[s].start]={end:t[s].end,deferred:i}},_createList:function(){var e,t,i,s,n,r,a=this,l=a.content.get(0),o=a.options,u=a.dataSource;a.bound()&&a._clean(),a._saveInitialRanges(),a._buildValueGetter(),a.setScreenHeight(),a.itemCount=(e=a._screenHeight,t=o.listScreens,i=o.itemHeight,Math.ceil(e*t/i)),a.itemCount>u.total()&&(a.itemCount=u.total()),a._items=a._generateItems(a.element[0],a.itemCount),a._setHeight(o.itemHeight*u.total()),a.options.type=(u.group()||[]).length?"group":"flat","flat"===a.options.type?a.header.closest(x).length?a.header.closest(x).hide():a.header.hide():a.header.closest(x).length?a.header.closest(x).show():a.header.show(),a.getter=a._getter((function(){a._renderItems(!0)})),a._onScroll=function(e,t){var i=a._listItems(a.getter);return a._fixedHeader(e,i(e,t))},a._renderItems=a._whenChanged((n=l,r=a._onScroll,function(e){return r(n.scrollTop,e)}),(s=a._reorderList(a._items,C.bind(a)),function(e,t){return s(e.items,e.index,t),e})),a._renderItems(),a._calculateGroupPadding(a._screenHeight),a._calculateColumnsHeaderPadding()},_setHeight:function(e){var t,i=this.heightContainer;if(i?t=i.offsetHeight:i=this.heightContainer=S(this.content[0],"k-height-container"),e!==t)for(i.innerHTML="";e>0;){var s=Math.min(e,25e4);S(i).style.height=s+"px",e-=s}},_getter:function(){var e=null,t=this.dataSource,i=t.skip(),s=this.options.type,n=this.itemCount,r={};return t.pageSize()<n&&this.mute((function(){t.pageSize(n)})),function(a,l){var o=this;if(t.inRange(l,n)){var u;if(i!==l&&this.mute((function(){t.range(l,n),i=l})),"group"===s){if(!r[l])for(var h=r[l]=[],c=t.view(),d=0,f=c.length;d<f;d++)for(var p=c[d],m=0,g=p.items.length;m<g;m++)h.push({item:p.items[m],group:p.value});u=r[l][a-l]}else u=t.view()[a-l];return u}return e!==l&&(e=l,i=l,o._getterDeferred&&o._getterDeferred.reject(),o._getterDeferred=o.deferredRange(l),o._getterDeferred.then((function(){var 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