/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import { BaseMenuController } from './base.controller.js';
import type { MenuKeyboardController } from '../interfaces/index.js';
import type { StateController } from './state.controller.js';
/**
 * Keyboard controller manages keyboard navigation for the menu component
 * Handles arrow keys, Enter/Space, Escape, Home/End, and type-ahead search
 */
export declare class KeyboardController extends BaseMenuController implements MenuKeyboardController {
    private stateController;
    private typeAheadBuffer;
    private typeAheadTimeout;
    private currentFocusIndex;
    constructor(host: any, stateController: StateController);
    hostConnected(): void;
    hostDisconnected(): void;
    /**
     * Main keydown handler - routes to specific handlers
     * @param event - The keyboard event
     */
    handleKeydown(event: KeyboardEvent): void;
    /**
     * Handle arrow key navigation
     * @param event - The keyboard event
     */
    handleArrowNavigation(event: KeyboardEvent): void;
    /**
     * Navigate down to the next interactive item
     * @param items - All menu items
     * @param currentIndex - Current focused item index
     */
    private navigateDown;
    /**
     * Navigate up to the previous interactive item
     * @param items - All menu items
     * @param currentIndex - Current focused item index
     */
    private navigateUp;
    /**
     * Expand submenu or navigate into it (ArrowRight)
     * @param element - The current element
     */
    private expandOrNavigate;
    /**
     * Collapse submenu or navigate out of it (ArrowLeft)
     * @param element - The current element
     */
    private collapseOrNavigate;
    /**
     * Handle Enter or Space key activation
     * @param event - The keyboard event
     */
    handleActivation(event: KeyboardEvent): void;
    /**
     * Handle Escape key - close all submenus
     * @param event - The keyboard event
     */
    handleEscape(event: KeyboardEvent): void;
    /**
     * Handle Home/End keys - jump to first/last item
     * @param event - The keyboard event
     */
    private handleHomeEnd;
    /**
     * Handle type-ahead search - type letters to jump to items
     * @param event - The keyboard event
     */
    handleTypeAhead(event: KeyboardEvent): void;
    /**
     * Check if an element's text matches the type-ahead buffer
     * @param element - The element to check
     * @returns True if the element matches
     */
    private matchesTypeAhead;
    /**
     * Reset the type-ahead buffer
     */
    resetTypeAhead(): void;
}
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