import { RegisteredFocusTrap } from '../types/shadow/RegisteredFocusTrap';
/**
 * Stack-based focus trap registry for stacked dialogs/drawers.
 *
 * The most recently registered trap is the active one; Tab/Shift+Tab cycle
 * focus within its container, resolving the current focus across shadow roots
 * (so a widget rendered into a ShadowRoot traps correctly). A single global
 * keydown listener is attached lazily on first registration.
 */
export declare const focusTrapRegistry: {
    /**
     * Attaches the global Tab listener exactly once (no-op without a DOM).
     * @returns {void} Nothing.
     */
    ensureTabListener(): void;
    /**
     * Registers a trap as the newest (de-duplicated by id) and ensures the
     * global Tab listener is attached.
     * @param {RegisteredFocusTrap} trap - The trap to register.
     * @returns {void} Nothing.
     */
    register(trap: RegisteredFocusTrap): void;
    /**
     * Removes a trap by id.
     * @param {string} id - The trap id.
     * @returns {void} Nothing.
     */
    unregister(id: string): void;
    /**
     * Returns the id of the current top-most trap, if any.
     * @returns {string | null} The top-most trap id, or null.
     */
    getTopMostId(): string | null;
};
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