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e!==t?(e=Qe.max(Qe.min(Qe.max(e,1),n.totalPages()),1),i=n.take(),n._isGroupPaged()?(e-=1,n.range(e*i,i,null,"page"),t):(n._query(n._pageableQueryOptions({page:e})),t)):(r=n.skip(),r!==t?Qe.round((r||0)/(n.take()||1))+1:t)},pageSize:function(e){var r=this;return e!==t?(r._query(r._pageableQueryOptions({pageSize:e,page:1})),t):r.take()},sort:function(e){var r=this;return e!==t?(r.trigger("sort"),r._query({sort:e}),t):r._sort},filter:function(e){var r=this;return e===t?r._filter:(r.trigger("reset"),r._query({filter:e,page:1}),t)},group:function(e){var r=this,i={group:e};return r._groupPaging&&(i.page=1),e!==t?(r._query(i),t):r._group},getGroupsFlat:function(e){var t,r,i,n=[];for(t=0,r=e.length;t=n;i--)r=a[i],t={value:e.get?e.get(r.field):e[r.field],field:r.field,items:t?[t]:[e],hasSubgroups:!!t,aggregates:this._emptyAggregates(r.aggregates)};return t},totalPages:function(){var e=this,t=e.pageSize()||e.total(),r=e._isGroupPaged()?e.groupsTotal(!0):e.total();return 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this._currentRequestTimeStamp=this._timeStamp(),this._skipRequestsInProgress=!0,a=this._isGroupPaged()?this.groupsTotal(!0):this.total(),"expandGroup"!==n&&"collapseGroup"!==n||this._updateOuterRangesLength(),e=Qe.min(e||0,a),i=Fe(i)?i:Pe,s=this,o=Qe.max(Qe.floor(e/r),0)*r,u=Qe.min(o+r,a),l=s._findRange(e,Qe.min(e+r,a),i),!l.length&&0!==a||s._fetchingGroupItems?(s._isGroupPaged()&&(s._originalPageSkip=o,s._originalSize=u,o=Qe.max(Qe.floor(s._adjustPageSkip(e,r)/r),0)*r,u=Qe.min(o+r,a)),r===t||s._fetchingGroupItems||(s._isGroupPaged()&&!s._groupRangeExists(o,r)||!s._rangeExists(o,u)?s.prefetch(o,r,function(){e>o&&u=r)return[];if(e>n.outerEnd){x.skipped+=n.outerEnd-(_||0),_=n.outerEnd;continue}if(t!==_&&_!=n.outerStart&&(x.skipped+=n.outerStart-_),x.skipped>x.skip)return[];for(t===_&&e>0&&n.start>0&&(x.skipped=n.outerStart),s=a;;){if(this._findGroupedRange(n.data,k,x,null,i),v=S._calculateGroupsTotal(k,!0,"currentItems"),v>=x.take)return k;if(S._fetchingGroupItems)return[];if(s++,!b[s]||b[s].outerStart!==n.outerEnd)break;n=b[s]}}else if(e>=n[R]&&e<=n[G]){for(c=0,s=a;s=n.start&&(g=n.data,d=n.end,P||(w.inPlaceSort?h=S._queryProcess(n.data,{filter:S.filter()}):(y=m(S.group()||[]).concat(o(S.sort()||[])),h=S._queryProcess(n.data,{sort:y,filter:S.filter()})),f=g=h.data,h.total!==t&&(d=h.total)),u=0,e+c>n.start&&(u=e+c-n.start),l=f.length,d>r&&(l-=d-r),c+=l-u,k=S._mergeGroups(k,g,u,l),r<=n.end&&c==r-e))return k;break}_=n.outerEnd}return[]},_getRangesMismatch:function(e){for(var t,r=this,i=r._ranges,n=0,a=0;;){if(t=i[a],!t||t.outerStart>e)break;t.outerEnd!=t.end&&(n=t.outerEnd-t.end),a++}return n},_mergeGroups:function(e,t,r,i){if(this._isServerGrouped()){var n,a=t.toJSON();return e.length&&(n=e[e.length-1]),C(n,a,r,i),e.concat(a)}return e.concat(t.slice(r,i))},_processRangeData:function(e,r,i,n,a,s){var 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o,u,l,g=!1,d={start:e,end:t,data:[],timestamp:n._timeStamp()};if(n._dequeueRequest(),n.trigger(Be,{response:s,type:"read"}),s=n.reader.parse(s),l=n._readData(s),l.length){for(o=0,u=n._ranges.length;o=n._currentRequestTimeStamp||!n._skipRequestsInProgress)&&(r&&l.length?r():n.trigger(Ae,{}))}},prefetch:function(e,r,i){var n=this,a=Qe.min(e+r,n.total()),s={take:r,skip:e,page:e/r+1,pageSize:r,sort:n._sort,filter:n._filter,group:n._group,aggregate:n._aggregate};return n._isGroupPaged()&&!n._isServerGrouped()&&n._groupRangeExists(e,a)?(i&&i(),t):(n._isServerGroupPaged()&&!n._groupRangeExists(e,a)||!n._rangeExists(e,a)?(clearTimeout(n._timeout),n._timeout=setTimeout(function(){n._queueRequest(s,function(){n.trigger(je,{type:"read"})?n._dequeueRequest():(n._omitPrefetch&&n.trigger(Le),n.transport.read({data:n._params(s),success:n._prefetchSuccessHandler(e,a,i),error:function(){var e=Ze.call(arguments);n.error.apply(n,e)}}))})},100)):i&&i(),t)},_multiplePrefetch:function(e,t,r){var i=this,n=Qe.min(e+t,i.total()),a={take:t,skip:e,page:e/t+1,pageSize:t,sort:i._sort,filter:i._filter,group:i._group,aggregate:i._aggregate};i._rangeExists(e,n)?r&&r():i.trigger(je,{type:"read"})||i.transport.read({data:i._params(a),success:i._prefetchSuccessHandler(e,n,r,!0)})},_adjustPageSkip:function(e,t){var r,i,n=this,a=n._getPrevRange(e),s=n.total();if(a){if(i=n._getRangesMismatch(e),!i)return e;e-=i}if(r=Qe.max(Qe.floor(e/t),0)*t,r>s)for(;;)if(r-=t,r=e)return n[t]},_getPrevRange:function(e){var t,r,i=this,n=i._ranges,a=n.length;for(t=a-1;t>=0;t--)if(n[t].outerStart<=e){r=n[t];break}return r},_rangeExists:function(e,t){var r,i,n=this,a=n._ranges;for(r=0,i=a.length;r=t)return!0;return!1},_groupRangeExists:function(e,t){var r,i,n,a=this,s=a._ranges,o=0,u=a.groupsTotal(!0);for(t>u&&!a._isServerGrouped()&&(t=u),r=0,i=s.length;r=e?o+=n.outerEnd-e:n.outerStart<=t&&n.outerEnd>=t&&(o+=t-n.outerStart);return o>=t-e},_getCurrentRangeSpan:function(){var e,t,r=this,i=r._ranges,n=r.currentRangeStart(),a=n+(r.take()||0),s=[],o=i.length;for(t=0;t=n||e.start>=n&&e.start<=a)&&s.push(e);return s},_removeModelFromRanges:function(e){var t,r,i,n=this;for(r=0,i=this._ranges.length;r=e){n._getByUid(t.uid,r.data)||(n._isServerGrouped()?r.data.splice(e,0,n._wrapInEmptyGroup(t)):r.data.splice(e,0,t));break}n._updateRangesLength()},_updateRangesLength:function(){var e,t,r,i=this,n=i._ranges||[],a=n.length,s=!1,o=0,u=0;for(r=0;r0?this.filter(this._hierarchicalFilter):(this.options.filter=this._hierarchicalFilter,this._filter=g(this.options.filter),this._hierarchicalFilter=null)),t},remove:function(e){var t,r=e.parentNode(),i=this;return r&&r._initChildren&&(i=r.children),t=ge.fn.remove.call(i,e),r&&!i.data().length&&(r.hasChildren=!1),t},success:Q("success"),data:Q("data"),insert:function(e,t){var r=this.parent();return r&&r._initChildren&&(r.hasChildren=!0,r._initChildren()),ge.fn.insert.call(this,e,t)},filter:function(e){return e===t?this._filter:(!this.options.serverFiltering&&this._markHierarchicalQuery(e)&&(e={logic:"or",filters:[e,{field:"_matchFilter",operator:"equals",value:!0}]}),this.trigger("reset"),this._query({filter:e,page:1}),t)},_markHierarchicalQuery:function(t){var r,i,n,a,o,u=this.options.accentFoldingFiltering;return t=u?e.extend({},g(t),{accentFoldingFiltering:u}):g(t),t&&0!==t.filters.length?(r=s.filterExpr(t),n=r.fields,a=r.operators,i=o=Function("d, __f, __o","return "+r.expression),(n.length||a.length)&&(o=function(e){return i(e,n,a)}),this._updateHierarchicalFilter(o),!0):(this._updateHierarchicalFilter(function(){return!0}),!1)},_updateHierarchicalFilter:function(e){var t,r,i=this._data,n=!1;for(r=0;r=this.total()?(this.trigger("endreached",{index:e}),null):this.useRanges?this.useRanges?((e=this.skip+r)&&(i=this.range(Math.floor(e/r)*r)),e===this.prefetchThreshold&&this._prefetch(),e===this.midPageThreshold?this.range(this.nextMidRange,!0):e===this.nextPageThreshold?this.range(this.nextFullRange):e===this.pullBackThreshold&&this.range(this.offset===this.skip?this.previousMidRange:this.previousFullRange),i?this.dataSource.at(e-this.dataOffset):(this.trigger("endreached",{index:e}),null)):t:this.dataSource.view()[e]},indexOf:function(e){return this.dataSource.data().indexOf(e)+this.dataOffset},total:function(){return parseInt(this.dataSource.total(),10)},next:function(){var e=this,t=e.pageSize,r=e.skip-e.viewSize+t,i=Qe.max(Qe.floor(r/t),0)*t;this.offset=r,this.dataSource.prefetch(i,t,function(){e._goToRange(r,!0)})},range:function(e,t){if(this.offset===e)return!0;var r=this,i=this.pageSize,n=Qe.max(Qe.floor(e/i),0)*i,a=this.dataSource;return t&&(n+=i),a.inRange(e,i)?(this.offset=e,this._recalculate(),this._goToRange(e),!0):!this.prefetch||(a.prefetch(n,i,function(){r.offset=e,r._recalculate(),r._goToRange(e,!0)}),!1)},syncDataSource:function(){var e=this.offset;this.offset=null,this.range(e)},destroy:function(){this.unbind()},_prefetch:function(){var e=this,t=this.pageSize,r=this.skip+t,i=this.dataSource;i.inRange(r,t)||this._prefetching||!this.prefetch||(this._prefetching=!0,this.trigger("prefetching",{skip:r,take:t}),i.prefetch(r,t,function(){e._prefetching=!1,e.trigger("prefetched",{skip:r,take:t})}))},_goToRange:function(e,t){this.offset===e&&(this.dataOffset=e,this._expanding=t,this.dataSource.range(e,this.pageSize),this.dataSource.enableRequestsInProgress())},_reset:function(){this._syncPending=!0},_change:function(){var e=this.dataSource;this.length=this.useRanges?e.lastRange().end:e.view().length,this._syncPending&&(this._syncWithDataSource(),this._recalculate(),this._syncPending=!1,this.trigger("reset",{offset:this.offset})),this.trigger("resize"),this._expanding&&this.trigger("expand"),delete this._expanding},_syncWithDataSource:function(){var e=this.dataSource;this._firstItemUid=e.firstItemUid(),this.dataOffset=this.offset=e.skip()||0,this.pageSize=e.pageSize(),this.useRanges=e.options.serverPaging},_recalculate:function(){var e=this.pageSize,t=this.offset,r=this.viewSize,i=Math.ceil(t/e)*e;this.skip=i,this.midPageThreshold=i+e-1,this.nextPageThreshold=i+r-1,this.prefetchThreshold=i+Math.floor(e/3*2),this.pullBackThreshold=this.offset-1,this.nextMidRange=i+e-r,this.nextFullRange=i,this.previousMidRange=t-r,this.previousFullRange=i-e}}),pe=xe.Observable.extend({init:function(e,t){var r=this;xe.Observable.fn.init.call(r),this.dataSource=e,this.batchSize=t,this._total=0,this.buffer=new ce(e,3*t),this.buffer.bind({endreached:function(e){r.trigger("endreached",{index:e.index})},prefetching:function(e){r.trigger("prefetching",{skip:e.skip,take:e.take})},prefetched:function(e){r.trigger("prefetched",{skip:e.skip,take:e.take})},reset:function(){r._total=0,r.trigger("reset")},resize:function(){r._total=Math.ceil(this.length/r.batchSize),r.trigger("resize",{total:r.total(),offset:this.offset})}})},syncDataSource:function(){this.buffer.syncDataSource()},at:function(e){var t,r,i=this.buffer,n=e*this.batchSize,a=this.batchSize,s=[];for(i.offset>n&&i.at(i.offset-1),r=0;r