/**
 * Copyright (c) IBM, Corp. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
/// <reference types="node" />
import { LitElement } from 'lit';
import type { TemplateResult } from 'lit';
import '../column-list/index.js';
interface HighlightTextState {
    text: string;
    isHighlighted: boolean;
}
interface NavLink {
    label: string;
    url: string;
}
interface QiskitMegaMenuDropdownGroup {
    title: NavLink;
    content: NavLink[];
}
interface QiskitMegaMenuDropdownBlock {
    title: string;
    content: QiskitMegaMenuDropdownGroup[];
}
export type QiskitMegaMenuDropdownContent = QiskitMegaMenuDropdownBlock[];
export declare class QiskitMegaMenuDropdown extends LitElement {
    static styles: import("lit").CSSResultGroup[];
    protected _filterInput: HTMLInputElement;
    protected _mainElement: HTMLElement;
    placeholder: string;
    content: QiskitMegaMenuDropdownContent;
    protected _performedSearchEventTimeout: NodeJS.Timeout | null;
    protected _showContent: boolean;
    protected _filteredContent: QiskitMegaMenuDropdownContent;
    private highlightedText;
    private emptyContentView;
    render(): TemplateResult<1>;
    connectedCallback(): void;
    disconnectedCallback(): void;
    _handleClick: (e: MouseEvent) => void;
    get _textOnTheFilter(): string;
    set _textOnTheFilter(val: string);
    get _isFilteredContentEmpty(): boolean;
    get _isFilterTextEmpty(): boolean;
    _wordsOnTheFilter(): string[];
    _onShowContent(): void;
    _onSwitchShowContent(): void;
    _onTextOnTheFilterChanged(): void;
    _filterContent(): QiskitMegaMenuDropdownContent;
    _filterMegaDropdownBlock(block: QiskitMegaMenuDropdownBlock, wordsOnTheFilter: string[]): QiskitMegaMenuDropdownBlock;
    _filterMegaDropdownGroup(group: QiskitMegaMenuDropdownGroup, wordsOnTheFilter: string[]): QiskitMegaMenuDropdownGroup;
    _containsWordsOnTheFilter(label: string, wordsOnTheFilter: string[]): boolean;
    _splitTextInHighlightParts(menuLabel: string): HighlightTextState[];
    _splitTextInHighlightedChars(menuLabel: string, wordsOnTheFilter: string[]): HighlightTextState[];
    _joinCharsByHighlightedState(highlightStateByChar: HighlightTextState[]): HighlightTextState[];
    _performedSearch(): void;
    _removePerformedSearchEventTimeout(): void;
    _dispatchPerformedSearchEvent(text: string): void;
}
declare global {
    interface HTMLElementTagNameMap {
        'qiskit-mega-menu-dropdown': QiskitMegaMenuDropdown;
    }
}
export {};