import { BehaviorSubject } from 'rxjs';
export declare class Viewport<D> {
    private maxVisibleCount;
    scrolled: number;
    private rows;
    private steps;
    readonly scrollStep = 100;
    private stepBorder;
    prevDirection: 1 | 0;
    private shaperDom;
    private host;
    paginator: Paginator | null;
    private visibleCount;
    constructor(maxVisibleCount: number);
    setHost(host: HTMLElement, rowHeight: number, excludeHeight?: number): void;
    build(rows: D[]): D[];
    setPaginator(paginator: PaginatorArgs): void;
    private getOffset;
    update(): void;
    private goTo;
    goToIndex(index: number): void;
    goToField(getter: (row: D) => boolean): void;
}
export interface PaginatorArgs {
    fireAfterRowsLeft: number;
    paginate: (rowsCount: number) => Promise<boolean>;
}
export declare class Paginator implements PaginatorArgs {
    readonly isPaginating: BehaviorSubject<boolean>;
    readonly fireAfterRowsLeft: number;
    readonly paginate: (rowsCount: number) => Promise<boolean>;
    readonly isActive: boolean;
    constructor({ fireAfterRowsLeft, paginate }: PaginatorArgs);
    tryToPaginate(left: number, currentCount: number): Promise<boolean>;
}