import { MaterialItem } from '@gamepark/rules-api';
/**
 * Records the items array currently on screen, for each item type.
 *
 * Locators are handed a game state they cannot identify: on top of the state being displayed, animations
 * build deep copies of it to work out where a move leads ({@link ItemAnimations.getPreMoveSiblingAnimation},
 * {@link MoveItemAnimations.getMovedItemAnimation}). Those copies have the moving item already gone from
 * where it still stands on the table, so anything that drops memoized state must first make sure it is not
 * looking at one of them.
 *
 * {@link DynamicItemsDisplay} is the single writer, once per render and per type.
 */
declare class DisplayedItems {
    private items;
    /**
     * Record the items being displayed for one type.
     * @param type The item type
     * @param items The items of that type in the state being rendered
     */
    track(type: number, items: MaterialItem[]): void;
    /**
     * @param type The item type
     * @param items The items of that type in the state the caller is looking at
     * @returns true if that array is the one being displayed, false if it is a copy an animation is simulating on
     */
    isDisplayed(type: number, items?: MaterialItem[]): boolean;
}
/**
 * Tells the state being displayed apart from the copies animations simulate on. See {@link DisplayedItems}.
 */
export declare const displayedItems: DisplayedItems;
export {};