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n,i,o=this,r=o.options,l=r.filterFields&&e&&e.logic&&e.filters&&e.filters.length,c=o.dataSource,d=B({},c.filter()||{}),u=e||d.filters&&d.filters.length&&!e,h=s(d,r.dataTextField);if(this._clearFilterExpressions(d),!e&&!h||!o.trigger("filtering",{filter:e}))return n={filters:[],logic:"and"},l?n.filters.push(e):this._pushFilterExpression(n,e),a(d)&&(n.logic===d.logic?n.filters=n.filters.concat(d.filters):n.filters.push(d)),o._cascading&&this.listView.setDSFilter(n),i=B({},{page:u?1:c.page(),pageSize:u?c.options.pageSize:c.pageSize(),sort:c.sort(),filter:c.filter(),group:c.group(),aggregate:c.aggregate()},{filter:n}),c[t?"read":"query"](c._mergeState(i))},_pushFilterExpression:function(e,t){a(t)&&""!==t.value&&e.filters.push(t)},_clearFilterExpressions:function(e){var t,n;if(e.filters){for(n=0;n').attr({role:"button",tabIndex:-1})),t.options.clearButton||t._clear.remove(),this._hideClear()},search:function(t){var n=this.options;t="string"==typeof t?t:this._inputValue(),clearTimeout(this._typingTimeout),(!n.enforceMinLength&&!t.length||t.length>=n.minLength)&&(this._state="filter",this.listView&&(this.listView._emptySearch=!e.trim(t).length),this._isFilterEnabled()?this._filter({word:t,open:!0}):this._searchByWord(t))},current:function(e){return this._focus(e)},items:function(){return this.ul[0].children},destroy:function(){var e=this,t=e.ns;f.fn.destroy.call(e),e._unbindDataSource(),e.listView.destroy(),e.list.off(t),e.popup.destroy(),e._form&&e._form.off("reset",e._resetHandler)},dataItem:function(n){var i=this;if(n===t)return i.listView.selectedDataItems()[0];if("number"!=typeof n){if(i.options.virtual)return i.dataSource.getByUid(e(n).data("uid"));n=e(i.items()).index(n)}return i.dataSource.flatView()[n]},_activateItem:function(){var e=this.listView.focus();e&&this._focused.add(this.filterInput).attr("aria-activedescendant",e.attr("id"))},_deactivateItem:function(){this._focused.add(this.filterInput).removeAttr("aria-activedescendant")},_accessors:function(){var e=this,t=e.element,n=e.options,i=d.getter,o=t.attr(d.attr("text-field")),r=t.attr(d.attr("value-field"));!n.dataTextField&&o&&(n.dataTextField=o),!n.dataValueField&&r&&(n.dataValueField=r),e._text=i(n.dataTextField),e._value=i(n.dataValueField)},_aria:function(e){var n=this,i=n.options,o=n._focused.add(n.filterInput);i.suggest!==t&&o.attr("aria-autocomplete",i.suggest?"both":"list"),e=e?e+" "+n.ul[0].id:n.ul[0].id,o.attr("aria-owns",e),n.ul.attr("aria-live",n._isFilterEnabled()?"polite":"off"),n._ariaLabel()},_ariaLabel:function(){var t,n=this,i=n._focused,o=n.element,r=o.attr("id"),a=e('label[for="'+r+'"]'),s=o.attr("aria-label"),l=o.attr("aria-labelledby");i!==o&&(s?i.attr("aria-label",s):l?i.attr("aria-labelledby",l):a.length&&(t=a.attr("id")||n._generateLabelId(a,r||d.guid()),i.attr("aria-labelledby",t)))},_generateLabelId:function(e,t){var n=t+A;return e.attr("id",n),n},_blur:function(){var e=this;e._change(),e.close()},_change:function(){var e,i=this,o=i.selectedIndex,r=i.options.value,a=i.value();i._isSelect&&!i.listView.bound()&&r&&(a=r),a!==n(i._old,typeof a)&&a!==n(i._oldText,typeof a)?e=!0:i._valueBeforeCascade!==t&&i._valueBeforeCascade!==n(i._old,typeof i._valueBeforeCascade)&&i._userTriggered?e=!0:o===t||o===i._oldIndex||i.listView.isFiltered()||(e=!0),e&&(i._valueBeforeCascade=i._old=null===i._old||""===i._old||""===a?a:i.dataItem()?i.options.dataValueField?i.dataItem()[i.options.dataValueField]:i.dataItem():null,i._oldIndex=o,i._oldText=i.text&&i.text(),i._typing||i.element.trigger(y),i.trigger(y)),i.typing=!1},_data:function(){return this.dataSource.view()},_enable:function(){var e=this,n=e.options,i=e.element.is("[disabled]");n.enable!==t&&(n.enabled=n.enable),!n.enabled||i?e.enable(!1):e.readonly(e.element.is("[readonly]"))},_dataValue:function(e){var n=this._value(e);return n===t&&(n=this._text(e)),n},_offsetHeight:function(){var t=0,n=this.listView.content.prevAll(":visible");return n.each(function(){var n=e(this);t+=h(n,!0)}),t},_height:function(n){var i,o,r,a=this,s=a.list,l=a.options.height,c=a.popup.visible();if(n||a.options.noDataTemplate){if(o=s.add(s.parent(".k-animation-container")).show(),!s.is(":visible"))return o.hide(),t;l=a.listView.content[0].scrollHeight>l?l:"auto",o.height(l),"auto"!==l&&(i=a._offsetHeight(),r=h(e(a.footer))||0,l=l-i-r),a.listView.content.height(l),c||o.hide()}return l},_openHandler:function(e){this._adjustListWidth(),this.trigger(E)?e.preventDefault():(this._focused.attr("aria-expanded",!0),this.ul.attr("aria-hidden",!1))},_adjustListWidth:function(){var e,t,n=this,i=n.list,o=i[0].style.width,r=n.wrapper;if(i.data(V)||!o)return e=window.getComputedStyle?window.getComputedStyle(r[0],null):0,t=parseFloat(e&&e.width)||b(r),e&&N.msie&&(t+=parseFloat(e.paddingLeft)+parseFloat(e.paddingRight)+parseFloat(e.borderLeftWidth)+parseFloat(e.borderRightWidth)),o="border-box"!==i.css("box-sizing")?t-(b(i)-i.width()):t,i.css({fontFamily:r.css("font-family"),width:n.options.autoWidth?"auto":o,minWidth:o,whiteSpace:n.options.autoWidth?"nowrap":"normal"}).data(V,o),!0},_closeHandler:function(e){this.trigger(I)?e.preventDefault():(this._focused.attr("aria-expanded",!1),this.ul.attr("aria-hidden",!0))},_focusItem:function(){var e=this.listView,n=!e.focus(),o=i(e.select());o===t&&this.options.highlightFirst&&n&&(o=0),o!==t?e.focus(o):n&&e.scrollToIndex(0)},_calculateGroupPadding:function(e){var t=this.ul.children(".k-first:first"),n=this.listView.content.prev(T),i=0,o="right";n[0]&&"none"!==n[0].style.display&&("auto"!==e&&(i=d.support.scrollbar()),this.element.parents(".k-rtl").length&&(o="left"),i+=parseFloat(t.css("border-"+o+"-width"),10)+parseFloat(t.children(".k-group").css("padding-"+o),10),n.css("padding-"+o,i))},_calculatePopupHeight:function(e){var t=this._height(this.dataSource.flatView().length||e);this._calculateGroupPadding(t),this._calculateColumnsHeaderPadding(t)},_calculateColumnsHeaderPadding:function(e){var t,n,i;this.options.columns&&this.options.columns.length&&(t=this,n=m.isRtl(t.wrapper),i=d.support.scrollbar(),t.columnsHeader.css(n?"padding-left":"padding-right","auto"!==e?i:0))},_refreshScroll:function(){var e=this.listView,t=e.element.height()>e.content.height();this.options.autoWidth&&e.content.css({overflowX:"hidden",overflowY:t?"scroll":"auto"})},_resizePopup:function(e){this.options.virtual||(this.popup.element.is(":visible")?this._calculatePopupHeight(e):(this.popup.one("open",function(e){return L(function(){this._calculatePopupHeight(e)},this)}.call(this,e)),this.popup.one("activate",L(this._refreshScroll,this))))},_popup:function(){var e=this;e.popup=new u.Popup(e.list,B({},e.options.popup,{anchor:e.wrapper,open:L(e._openHandler,e),close:L(e._closeHandler,e),animation:e.options.animation,isRtl:m.isRtl(e.wrapper),autosize:e.options.autoWidth}))},_makeUnselectable:function(){U&&this.list.find("*").not(".k-textbox").attr("unselectable","on")},_toggleHover:function(t){e(t.currentTarget).toggleClass(C,"mouseenter"===t.type)},_toggle:function(e,n){var i=this,o=m.mobileOS&&(m.touch||m.MSPointers||m.pointers);e=e!==t?e:!i.popup.visible(),n||o||i._focused[0]===_()||(i._prevent=!0,i._focused.focus(),i._prevent=!1),i[e?E:I]()},_triggerCascade:function(){var e=this;e._cascadeTriggered&&e.value()===n(e._cascadedValue,typeof e.value())||(e._cascadedValue=e.value(),e._cascadeTriggered=!0,e.trigger(M,{userTriggered:e._userTriggered}))},_triggerChange:function(){this._valueBeforeCascade!==this.value()&&this.trigger(y)},_unbindDataSource:function(){var e=this;e.dataSource.unbind(P,e._requestStartHandler).unbind(z,e._requestEndHandler).unbind("error",e._errorHandler)},requireValueMapper:function(e,t){var n=(e.value instanceof Array?e.value.length:e.value)||(t instanceof Array?t.length:t);if(n&&e.virtual&&"function"!=typeof e.virtual.valueMapper)throw Error("ValueMapper is not provided while the value is being set. See http://docs.telerik.com/kendo-ui/controls/editors/combobox/virtualization#the-valuemapper-function")}});B(G,{inArray:function(e,t){var n,i,o=t.children;if(!e||e.parentNode!==t)return-1;for(n=0,i=o.length;n"),n._customOption=o,i.append(o)),o.text(t),o[0].selected=!0},_hideBusy:function(){var e=this;clearTimeout(e._busy),e._arrowIcon.removeClass(S),e._focused.attr("aria-busy",!1),e._busy=null,e._showClear()},_showBusy:function(e){var t=this;e.isDefaultPrevented()||(t._request=!0,t._busy||(t._busy=setTimeout(function(){t._arrowIcon&&(t._focused.attr("aria-busy",!0),t._arrowIcon.addClass(S),t._hideClear())},100)))},_requestEnd:function(){this._request=!1,this._hideBusy()},_dataSource:function(){var t,n=this,i=n.element,o=n.options,r=o.dataSource||{};r=e.isArray(r)?{data:r}:r,n._isSelect&&(t=i[0].selectedIndex,t>-1&&(o.index=t),r.select=i,r.fields=[{field:o.dataTextField},{field:o.dataValueField}]),n.dataSource?n._unbindDataSource():(n._requestStartHandler=L(n._showBusy,n),n._requestEndHandler=L(n._requestEnd,n),n._errorHandler=L(n._hideBusy,n)),n.dataSource=d.data.DataSource.create(r).bind(P,n._requestStartHandler).bind(z,n._requestEndHandler).bind("error",n._errorHandler)},_firstItem:function(){this.listView.focusFirst()},_lastItem:function(){this.listView.focusLast()},_nextItem:function(){this.listView.focusNext()},_prevItem:function(){this.listView.focusPrev()},_move:function(e){var n,i,o,r,a,s,l,c=this,d=c.listView,u=e.keyCode,h=u===g.DOWN;if(u===g.UP||h){if(e.altKey)c.toggle(h);else{if(!d.bound()&&!c.ul[0].firstChild)return c._fetch||(c.dataSource.one(y,function(){c._fetch=!1,c._move(e)}),c._fetch=!0,c._filterSource()),e.preventDefault(),!0;if(o=c._focus(),c._fetch||o&&!o.hasClass("k-state-selected")||(h?(c._nextItem(),c._focus()||c._lastItem()):(c._prevItem(),c._focus()||c._firstItem())),n=d.dataItemByIndex(d.getElementIndex(c._focus())),c.trigger(F,{dataItem:n,item:c._focus()}))return c._focus(o),t;c._select(c._focus(),!0).done(function(){c.popup.visible()||c._blur(),c._cascadedValue=null===c._cascadedValue?c.value():c.dataItem()?c.dataItem()[c.options.dataValueField]||c.dataItem():null})}e.preventDefault(),i=!0}else if(u===g.ENTER||u===g.TAB){if(c.popup.visible()&&e.preventDefault(),o=c._focus(),n=c.dataItem(),c.popup.visible()||n&&c.text()===c._text(n)||(o=null),r=c.filterInput&&c.filterInput[0]===_(),o){if(n=d.dataItemByIndex(d.getElementIndex(o)),s=!0,n&&(s=c._value(n)!==G.unifyType(c.value(),typeof c._value(n))),s&&c.trigger(F,{dataItem:n,item:o}))return;a=c._select(o)}else c.input&&((c._syncValueAndText()||c._isSelect)&&c._accessor(c.input.val()),c.listView.value(c.input.val()));c._focusElement&&c._focusElement(c.wrapper),r&&u===g.TAB?c.wrapper.focusout():a&&"function"==typeof a.done?a.done(function(){c._blur()}):c._blur(),c.close(),i=!0}else u===g.ESC?(c.popup.visible()&&e.preventDefault(),c.close(),i=!0):!c.popup.visible()||u!==g.PAGEDOWN&&u!==g.PAGEUP||(e.preventDefault(),l=u===g.PAGEDOWN?1:-1,d.scrollWith(l*d.screenHeight()),i=!0);return i},_fetchData:function(){var e=this,t=!!e.dataSource.view().length;e._request||e.options.cascadeFrom||e.listView.bound()||e._fetch||t||(e._fetch=!0,e.dataSource.fetch().done(function(){e._fetch=!1}))},_options:function(e,n,i){var r,a,s,l,c=this,d=c.element,u=d[0],h=e.length,p="",f=0;for(n&&(p=n);f",p+=r;d.html(p),i!==t&&(u.value=i,u.value&&!i&&(u.selectedIndex=-1)),u.selectedIndex!==-1&&(r=o(u),r&&r.setAttribute(R,R))},_reset:function(){var t=this,n=t.element,i=n.attr("form"),o=i?e("#"+i):n.closest("form");o[0]&&(t._resetHandler=function(){setTimeout(function(){t.value(t._initial)})},t._form=o.on("reset",t._resetHandler))},_parentWidget:function(){var t,n,i,o=this.options.name;if(this.options.cascadeFrom){if(t=e("#"+this.options.cascadeFrom),n=t.data("kendo"+o),!n)for(i=0;i