import { AfterContentInit, NgZone, OnChanges, OnDestroy } from '@angular/core';
import { Subject } from 'rxjs';
import { CdkTable } from '@angular/cdk/table';
import { FixedSizeTableVirtualScrollStrategy } from './fixed-size-table-virtual-scroll-strategy';
export declare function _tableVirtualScrollDirectiveStrategyFactory(tableDir: TableItemSizeDirective): FixedSizeTableVirtualScrollStrategy;
export declare class TableItemSizeDirective implements OnChanges, AfterContentInit, OnDestroy {
    private zone;
    private alive;
    rowHeight: number;
    headerEnabled: boolean;
    headerHeight: number;
    footerEnabled: boolean;
    footerHeight: number;
    bufferMultiplier: number;
    table: CdkTable<any>;
    scrollStrategy: FixedSizeTableVirtualScrollStrategy;
    dataSourceChanges: Subject<void>;
    private stickyPositions;
    constructor(zone: NgZone);
    ngOnDestroy(): void;
    private isAlive;
    private isStickyEnabled;
    ngAfterContentInit(): void;
    connectDataSource(dataSource: any): void;
    ngOnChanges(): void;
    setSticky(offset: any): void;
    private initStickyPositions;
}