/** Fallback width (px) reserved for the "+N" overflow indicator until the real
 * indicator has been measured. Passed to `useOverflowItems.reserveSpace`. */
export declare const OVERFLOW_RESERVE_SPACE = 80;
/**
 * Shallow item-by-item equality for two lists. Order-sensitive — items must
 * match at the same index. Used to guard `onOverflow` from re-firing when the
 * hidden set keeps a fresh array identity but the same contents. A `null`
 * previous list is treated as "not equal".
 */
export declare function areItemsShallowEqual<T>(prev: T[] | null, next: T[]): boolean;
export interface ResolveVisibleItemsParams<T> {
    /** Full source list, in order. */
    items: T[];
    /** Items the overflow engine decided are visible. */
    visibleItems: T[];
    /** Items the overflow engine collapsed into the indicator. */
    hiddenItems: T[];
    /** Minimum number of items to keep visible regardless of available space. */
    minVisibleItems: number;
}
/**
 * Applies the `minVisibleItems` floor to the overflow engine's output. When the
 * engine collapses below the floor (and the list is long enough), force the
 * first `minVisibleItems` to stay visible and recompute the hidden tail.
 * Otherwise the engine's split is returned untouched (same references).
 */
export declare function resolveVisibleItems<T>({ items, visibleItems, hiddenItems, minVisibleItems, }: ResolveVisibleItemsParams<T>): {
    visibleItems: T[];
    hiddenItems: T[];
};