import { InjectionToken, Provider } from '@angular/core';
import { NgeMarkdownTransformer } from '../nge-markdown-transformer';
import { NgeMarkdownContribution } from '../nge-markdown-contribution';
import * as i0 from "@angular/core";
/** Custom options to pass to NgeMarkdownKatex contribution. */
export interface NgeMarkdownKatexOptions {
    /** Base url to load katex scripts and styles. (default https://cdn.jsdelivr.net/npm/katex@0.15.1/dist) */
    baseUrl?: string;
    /** Options to pass to katex render function. https://katex.org/docs/options.html */
    options?: Record<string, any>;
    /** Katex extensions to include. https://katex.org/docs/libs.html  */
    extensions?: {
        /** https://github.com/Khan/KaTeX/tree/master/contrib/mhchem (default to `true`) */
        mhchem?: boolean;
        /** https://github.com/Khan/KaTeX/tree/master/contrib/copy-tex (default to `true`) */
        copyTex?: boolean;
    };
}
/** Custom options to pass to NgeMarkdownKatex contribution. */
export declare const NGE_MARKDOWN_KATEX_OPTIONS: InjectionToken<NgeMarkdownKatexOptions>;
/**
 * Contribution to render math expressions in markdown using [Katex](https://katex.org) library.
 */
export declare class NgeMarkdownKatex implements NgeMarkdownContribution {
    private readonly options;
    constructor(options: NgeMarkdownKatexOptions);
    dependencies(): any;
    contribute(transformer: NgeMarkdownTransformer): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgeMarkdownKatex, [{ optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgeMarkdownKatex>;
}
/**
 * Provider to render math expressions in markdown using [Katex](https://katex.org) library.
 */
export declare const NgeMarkdownKatexProvider: Provider;
/**
 * Provider to pass options to `NgeMarkdownKatex` contribution.
 * @param options `NgeMarkdownKatex` options.
 */
export declare function NgeMarkdownKatexOptionsProvider(options: NgeMarkdownKatexOptions): Provider;