/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import { BaseCollapseController, CollapseControllerHost } from './base.controller.js';
/**
 * Keyboard navigation controller for collapse component
 * Handles keyboard accessibility
 */
export declare class CollapseKeyboardController extends BaseCollapseController {
    private currentFocusIndex;
    constructor(host: CollapseControllerHost);
    hostConnected(): void;
    hostDisconnected(): void;
    /**
     * Add keyboard event listeners
     */
    private addKeyboardListeners;
    /**
     * Remove keyboard event listeners
     */
    private removeKeyboardListeners;
    /**
     * Handle keydown events
     */
    private handleKeyDown;
    /**
     * Handle focus events
     */
    private handleFocus;
    /**
     * Toggle section
     */
    private toggleSection;
    /**
     * Focus next section
     */
    private focusNextSection;
    /**
     * Focus previous section
     */
    private focusPreviousSection;
    /**
     * Focus first section
     */
    private focusFirstSection;
    /**
     * Focus last section
     */
    private focusLastSection;
    /**
     * Focus specific section
     */
    private focusSection;
    /**
     * Find next focusable section
     */
    private findNextFocusableSection;
    /**
     * Find previous focusable section
     */
    private findPreviousFocusableSection;
    /**
     * Get section index from header element
     */
    private getSectionIndex;
    /**
     * Get current focus index
     */
    getCurrentFocusIndex(): number;
}
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