import type MermaidType from 'mermaid';
import { LruCache } from '@jupyterlab/coreutils';
import type { IThemeManager } from '@jupyterlab/apputils';
import type { IMermaidManager } from './tokens';
/**
 * A mermaid diagram manager with cache.
 */
export declare class MermaidManager implements IMermaidManager {
    protected _diagrams: LruCache<string, HTMLElement>;
    protected _themes: IThemeManager | null;
    constructor(options?: MermaidManager.IOptions);
    /**
     * Post-process to ensure mermaid diagrams contain only valid SVG and XHTML.
     */
    static cleanMermaidSvg(svg: string): string;
    /**
     * Handle (re)-initializing mermaid based on external values.
     */
    initialize(): void;
    /**
     * Get the underlying, potentially un-initialized mermaid module.
     */
    getMermaid(): Promise<typeof MermaidType>;
    /**
     * Get the version of the currently-loaded mermaid module
     */
    getMermaidVersion(): string | null;
    /**
     * Get a pre-cached mermaid figure.
     *
     * This primarily exists for the needs of `marked`, which supports async node
     * visitors, but not async rendering.
     */
    getCachedFigure(text: string): HTMLElement | null;
    /**
     * Attempt a raw rendering of mermaid to an SVG string, extracting some metadata.
     */
    renderSvg(text: string): Promise<IMermaidManager.IRenderInfo>;
    /**
     * Provide and cache a fully-rendered element, checking the cache first.
     */
    renderFigure(text: string): Promise<HTMLElement>;
    /**
     * Provide a code block with the mermaid source.
     */
    makeMermaidCode(text: string): HTMLElement;
    /**
     * Get the parser message element from a failed parse.
     *
     * This doesn't do much of anything if the text is successfully parsed.
     */
    makeMermaidError(text: string): Promise<HTMLElement>;
    /**
     * Extract extra attributes to add to a generated figure.
     */
    makeMermaidFigure(info: IMermaidManager.IRenderInfo): HTMLElement;
}
/**
 * A namespace for implementation-specific details of this mermaid manager.
 */
export declare namespace MermaidManager {
    /**
     * Initialization options for the mermaid manager.
     */
    interface IOptions {
        maxCacheSize?: number | null;
        themes?: IThemeManager | null;
    }
}