import type { LanguageFn } from 'highlight.js';
/** A language of the dialog: its highlight.js name and its display name */
export interface CodeLanguage {
    name: string;
    label: string;
}
/** Name used for the automatic detection of the language */
export declare const AUTO = "auto";
/** Language of code that is not highlighted */
export declare const PLAIN = "plaintext";
/**
 * Registers a highlight.js language, in addition to the common ones that are included
 */
export declare function registerLanguage(name: string, language: LanguageFn): void;
/**
 * Languages known to the highlighter, sorted by display name. With `only`, just those of them, in that order.
 */
export declare function listLanguages(only?: string[]): CodeLanguage[];
/** Display name of a language, or the name itself when it is unknown */
export declare function languageLabel(name: string): string;
/**
 * Highlights `code` and returns the highlight.js HTML: escaped text with `<span class="hljs-…">` tokens.
 * `'auto'` detects the language; an unknown language is treated as plain text.
 */
export declare function highlight(code: string, language: string): {
    language: string;
    html: string;
};