import type { DCloneHTMLElement, DId } from '../../utils/types';
import React from 'react';
export type DVirtualScrollPerformance<T> = Pick<DVirtualScrollProps<T>, 'dList' | 'dExpands' | 'dItemSize' | 'dItemNested' | 'dItemKey' | 'dFocusable'>;
export interface DVirtualScrollRef<T> {
    scrollToItem: (item: T) => void;
    scrollToStep: (step: 1 | -1) => T | undefined;
    scrollToNested: () => T | undefined;
    scrollToStart: () => T | undefined;
    scrollToEnd: () => T | undefined;
}
export interface DItemRenderProps {
    aria: {
        'aria-level': number;
        'aria-setsize': number;
        'aria-posinset': number;
    };
    vsList?: React.ReactNode;
}
export interface DVirtualScrollProps<T> {
    children: (props: {
        render: DCloneHTMLElement;
        vsList: React.ReactNode;
    }) => JSX.Element | null;
    dRef?: {
        list?: React.ForwardedRef<any>;
    };
    dList: T[];
    dFillNode: React.ReactElement;
    dItemRender: (item: T, index: number, props: DItemRenderProps, parent: T[]) => React.ReactNode;
    dItemSize: number | ((item: T) => number);
    dItemNested?: (item: T) => {
        list?: T[];
        emptySize?: number;
        inAriaSetsize: boolean;
    } | undefined;
    dItemKey: (item: T) => DId;
    dFocusable?: boolean | ((item: T) => boolean);
    dFocusItem?: T;
    dSize?: number;
    dPadding?: number;
    dHorizontal?: boolean;
    dEmptyRender?: (item: T) => React.ReactNode;
    dExpands?: Set<DId>;
    onScrollEnd?: () => void;
}
declare function VirtualScroll<T>(props: DVirtualScrollProps<T>, ref: React.ForwardedRef<DVirtualScrollRef<T>>): JSX.Element | null;
export declare const DVirtualScroll: <T>(props: DVirtualScrollProps<T> & React.RefAttributes<DVirtualScrollRef<T>>) => ReturnType<typeof VirtualScroll>;
export {};