import type { NotificationNormalizedOptions } from './notification';
/**
 * Renders toast containers and individual notification elements. Used only by the Notification plugin.
 */
export declare class NotificationUI {
    #private;
    /**
     * @param {object} params Constructor parameters.
     * @param {HTMLElement} params.overlayElement Handsontable root overlays layer element.
     * @param {function(string, string): string | undefined} params.sanitizer Sanitizer for HTML strings.
     * @param {boolean} params.isRtl Whether the grid uses RTL layout.
     */
    constructor({ overlayElement, sanitizer, isRtl }: {
        overlayElement: HTMLElement;
        sanitizer: ((html: string, context: string) => string | undefined) | null | undefined;
        isRtl: boolean;
    });
    /**
     * Creates the notification host and four corner stack elements inside the overlays layer (`ht-overlay`).
     */
    install(): void;
    /**
     * @returns {HTMLElement | null}
     */
    getHost(): HTMLElement | null;
    /**
     * @param {string} position Stack key.
     * @returns {HTMLElement | undefined}
     */
    getStack(position: string): HTMLElement | undefined;
    /**
     * Updates RTL direction on the host.
     *
     * @param {boolean} isRtl Whether the grid uses RTL layout.
     */
    setRtl(isRtl: boolean): void;
    /**
     * Updates the HTML sanitizer used for string notification messages.
     *
     * @param {function(string, string): string | undefined} sanitizer Sanitizer from Handsontable settings, if any.
     */
    setSanitizer(sanitizer: ((html: string, context: string) => string | undefined) | null | undefined): void;
    /**
     * Builds a toast element from normalized options.
     *
     * @param {object} options Normalized notification options (id, variant, title, message, closable, actions).
     * @param {string} closeLabel Translated label for the close control.
     * @param {boolean} animation Whether enter animation is enabled.
     * @returns {{ element: HTMLElement }}
     */
    createToastElement(options: NotificationNormalizedOptions, closeLabel: string, animation: boolean): {
        element: HTMLElement;
    };
    /**
     * @param {HTMLElement} toastEl Toast root element.
     * @returns {HTMLElement[]}
     */
    static getFocusables(toastEl: HTMLElement): HTMLElement[];
    /**
     * Enables or disables sequential keyboard focus for notification controls. When disabled, controls stay
     * out of the tab order so opening a toast does not move focus; screen readers still receive `aria-live` updates.
     *
     * @param {HTMLElement | null} host Notification plugin host element.
     * @param {boolean} enabled Whether controls participate in tab navigation.
     */
    static setSequentialFocusWithinHost(host: HTMLElement | null, enabled: boolean): void;
    /**
     * Detaches the host from the DOM and clears internal stack references.
     */
    destroy(): void;
}