import type { Edge } from '@atlaskit/pragmatic-drag-and-drop-hitbox/closest-edge';
import type { BoardTicket } from './types';
/**
 * Where the drop currently points, resolved once for the whole board.
 *
 * Each card used to work this out for itself, from its own hover events. That
 * only ever answers for a card the pointer is physically over, so the moment the
 * pointer left the lanes — over the filters, between two columns, below the last
 * card — the preview vanished even though the drop would still have landed
 * somewhere. Resolving it in one place and handing it down means the preview
 * follows the answer wherever the answer came from.
 */
export interface DropAim {
    columnId: string;
    /** The card the preview hangs off, or `null` for a lane with nothing in it. */
    ticketId: string | null;
    /** Which side of that card. Meaningless when `ticketId` is `null`. */
    edge: Edge | null;
    /** The card being carried, drawn faded in the room it opened. */
    ticket: BoardTicket;
}
export declare const DropAimContext: import("react").Context<DropAim | null>;
/**
 * Picking a card up from the keyboard. Separate from the aim so a card can offer
 * it without subscribing to something that changes on every pointer move.
 */
export declare const BoardLiftContext: import("react").Context<((ticketId: string) => void) | null>;
export declare function useBoardLift(): ((ticketId: string) => void) | null;
/** Null while no drag is pointing anywhere the board would accept. */
export declare function useDropAim(): DropAim | null;
/** Whether two aims would draw the same thing — used to keep a pointer moving
 *  inside one card from re-rendering the board on every frame. */
export declare function isSameAim(a: DropAim | null, b: DropAim | null): boolean;
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