import { type RefObject, type UIEvent } from "react";
import type { CollectionItem } from "../common-hooks";
/**
 * [ item key, total height before the item, next row index, CollectionItem<Item>]
 * e.g. first item: [0, 0, 1, data[0]]
 */
export type Row<Item> = [number, number, number, CollectionItem<Item>];
interface VirtualizationHookProps<Item> {
    viewportRef: RefObject<HTMLElement>;
    data: CollectionItem<Item>[];
    itemGapSize?: number;
}
interface VirtualizationHookResult<Item> {
    rows: Row<Item>[];
    contentHeight: number;
    onVerticalScroll: (e: UIEvent<HTMLElement>) => void;
}
export declare const useVirtualization: <Item>({ viewportRef, data, itemGapSize, }: VirtualizationHookProps<Item>) => VirtualizationHookResult<Item>;
export {};