import type { ScrollOwner } from "./virtualizedGridTypes.ts";
/**
 * The closest ancestor that owns vertical scrolling.
 *
 * The computed value is enough. An `overflow-y:auto` ancestor can
 * be shorter than its contents only AFTER this grid installs its
 * virtual spacer, so requiring `scrollHeight > clientHeight` here
 * would miss the owner on the first commit and create the exact
 * document scrollbar this lookup prevents.
 */
export declare const findScrollOwner: (element: HTMLElement) => ScrollOwner;
/**
 * The offset from the scroll owner's content origin to the grid.
 *
 * Both formulas stay stable while their owner scrolls: the grid's
 * viewport-relative top falls by the same amount that `scrollY` or
 * `scrollTop` rises. The element path subtracts its border because
 * a scroll offset starts at the padding edge, not at the outer
 * border returned by `getBoundingClientRect()`.
 */
export declare const useScrollMargin: (scrollOwner: ScrollOwner) => {
    gridElement: import("react").RefObject<HTMLUListElement | null>;
    scrollMargin: number;
};
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