import { BlockTool, SanitizerConfig } from '@editorjs/editorjs';
import { BlockToolConstructorOptions, MenuConfig } from '@editorjs/editorjs/types/tools';

type EditorJsCodeHighlightData = {
    code?: string;
    language?: string;
    showlinenumbers?: boolean;
    showCopyButton?: boolean;
};
type EditorJsCodeHighlightConfig = {
    placeholder?: string;
    preserveBlank?: boolean;
};
type EditorJsCodeHighlightOptions = BlockToolConstructorOptions<EditorJsCodeHighlightData, EditorJsCodeHighlightConfig>;
declare class EditorJsCodeHighlight implements BlockTool {
    sanitize?: SanitizerConfig | undefined;
    /**
     * Editor.js API instance
     */
    private api;
    /**
     * Stores current block data internally
     */
    private _data;
    private readOnly;
    private _CSS;
    private _element;
    private editorInstance;
    constructor({ api, data, readOnly }: EditorJsCodeHighlightOptions);
    /**
     * Return Tool data
     */
    private get data();
    /**
     * Return Tool data
     */
    private set data(value);
    /**
     * Icon and title for displaying at the Toolbox
     *
     * @return {{icon: string, title: string}}
     */
    static get toolbox(): {
        icon: string;
        title: string;
    };
    /**
     * Returns true to notify the core that read-only mode is supported
     *
     * @return {boolean}
     */
    static get isReadOnlySupported(): boolean;
    /**
     * Check if text content is empty and set empty string to inner html.
     * We need this because some browsers (e.g. Safari) insert <br> into empty contenteditanle elements
     *
     * @param {KeyboardEvent} e - key up event
     */
    protected onKeyUp(e: KeyboardEvent): void;
    protected _updateEditorHeight(length: number): void;
    _debounce(func: Function, timeout?: number): (...args: any[]) => void;
    private _toggleLineNumbers;
    private _updateLanguage;
    save(_: HTMLElement): {
        code: string;
        language: string | undefined;
        showlinenumbers: boolean | undefined;
        showCopyButton: boolean | undefined;
    };
    renderSettings(): HTMLElement | MenuConfig;
    render(): HTMLElement | Promise<HTMLElement>;
    static get DEFAULT_PLACEHOLDER(): string;
    static get enableLineBreaks(): boolean;
}

export { EditorJsCodeHighlight as default };