import { type KeyboardEvent } from "react";
import { type FocusableIndexOptions, type TabIndexBehavior } from "./types.js";
/**
 * @since 6.0.0
 * @internal
 */
export declare const isElementDisabled: (element: HTMLElement) => boolean;
/**
 * @since 5.0.0
 * @internal
 */
export declare const isNotFocusable: (element: HTMLElement | undefined, includeDisabled: boolean) => boolean;
/**
 * @since 6.0.0
 * @internal
 */
export interface VirtualFocusableIndexOptions {
    focusables: readonly HTMLElement[];
    includeDisabled: boolean;
    activeDescendantId: string;
}
/**
 * @since 6.0.0
 * @internal
 */
export declare const getVirtualFocusDefaultIndex: (options: VirtualFocusableIndexOptions) => number;
/**
 * @since 5.0.0
 * @internal
 */
export declare const getFirstFocusableIndex: (options: FocusableIndexOptions) => number;
/**
 * @since 5.0.0
 * @internal
 */
export declare const getLastFocusableIndex: (options: FocusableIndexOptions) => number;
/**
 * @since 5.0.0
 * @internal
 */
interface NextFocusableIndexOptions extends FocusableIndexOptions {
    loopable: boolean;
    increment: boolean;
    currentFocusIndex: number;
}
/**
 * @since 5.0.0
 * @internal
 */
export declare const getNextFocusableIndex: (options: NextFocusableIndexOptions) => number;
/**
 * @since 5.0.0
 * @internal
 */
export declare function getSearchText(element: HTMLElement, searchable: boolean): string;
/**
 * @since 6.0.0
 * @internal
 */
export interface RecalculateOptions {
    focusables: readonly HTMLElement[];
    includeDisabled: boolean;
    tabIndexBehavior: TabIndexBehavior | undefined;
    activeDescendantId: string;
}
/**
 * This was added to help with specific widgets that cause focus index to change
 * between renders (i.e. expanding all tree items on the same level with `*`).
 * There might be a better way to handle this in the future.
 *
 * @since 6.0.0
 * @internal
 */
export declare function recalculateFocusIndex(options: RecalculateOptions): number;
/**
 * Checks if a keyboard event can trigger a search through focusable elements
 * by:
 *
 * - checking if the key is a single letter that is not the space key
 * - checking that the alt, ctrl, and meta keys are not being held
 *
 * The shift key **is allowed** because holding shift means "search from the
 * beginning" instead of "search from current location".
 *
 * @since 6.0.0
 * @internal
 */
export declare function isSearchableEvent(event: KeyboardEvent): boolean;
/**
 * @since 6.0.0
 * @internal
 */
export declare function isTypeEvent(event: KeyboardEvent): boolean;
export {};