import type { VirtualItem } from '@tanstack/react-virtual';
export type DragTranslate = {
    x: number;
    y: number;
    scaleX: number;
    scaleY: number;
};
export type OverlayPaint = {
    slideId: string;
    width: number;
    height: number;
    thumbX: number;
    thumbY: number;
    thumbW: number;
    thumbH: number;
};
/** dnd-kit strips CSS transforms when measuring. Virtual Y must be layout (`top`), not translateY. */
export declare const virtualRowBox: (row: Pick<VirtualItem, 'start' | 'size'>, drag: Pick<DragTranslate, 'x' | 'y'> | null) => {
    top: number;
    height: number;
    x: number;
    y: number;
};
export declare const restrictDragToVertical: ({ transform }: {
    transform: DragTranslate;
}) => {
    y: number;
    scaleX: number;
    scaleY: number;
    x: number;
};
export declare const overlayFromNode: (node: HTMLElement, slideId: string) => OverlayPaint;
export declare const wheelDeltaPx: (delta: number, deltaMode: number, pageSize: number, lineSize?: number) => number;
export declare const clampScrollTop: (scrollTop: number, delta: number, max: number) => number;
export declare const mergeActiveVirtualRow: <T extends Pick<VirtualItem, 'index'>>(rows: readonly T[], activeIndex: number, measured: T | undefined) => T[];