import type { Token, TagCollectionType } from './types';
export declare function escapeHtml(source: string): string;
/**
 * A configurable markdown <=> HTML converter.
 *
 * Examples:
 *
 *   const hopdown = new HopDown();
 *
 *   const html = hopdown.toHTML('**bold**');
 *   html === '<p><strong>bold</strong></p>';
 *
 *   const markdown = hopdown.toMarkdown(html);
 *   markdown === '**bold**';
 *
 *   const node = hopdown.toEditorNode('**bold**');
 *   (node as HTMLElement).outerHTML === (
 *      "<div>" +
 *      "<span class='delim strong'>**</span>" +
 *      "bold" +
 *      "<span class='delim strong'>" +
 *      "</div>"
 *   );
 */
export declare class HopDown {
    tags: TagCollectionType;
    private tokenizer;
    constructor(tags?: TagCollectionType | null);
    /**
     * Convert a markdown string to tokens.
     */
    tokenize(source: string): Token[];
    /**
     * Convert an HTML string or a DocumentFragment to markdown.
     */
    toMarkdown: (html: string | DocumentFragment) => string;
    /**
     * Convert a markdown string to a DocumentFragment consisting of wysiwyg editor nodes.
     */
    toEditorNode: (markdown: string) => DocumentFragment;
    toHTML: (markdown: string) => string;
    /**
     * Recursive entrypoint for converting markdown to html.
     */
    inlineToHTML: (markdown: string) => string;
    /**
     * Recursive entrypoint for converting markdown to editor nodes.
     */
    private inlineToEditorNodes;
    /**
     * Convert an HTML node to a markdown string. Used by toMarkdown().
     */
    private nodeToMarkdown;
    /**
     * Convert a token stream to editor nodes.
     */
    private tokensToEditorNodes;
    /**
     * Convert a token stream to HTML. Matches open/close delimiter
     * pairs and wraps their content in the appropriate HTML tags.
     * Unmatched delimiters are emitted as literal text.
     */
    private tokensToHTML;
    /**
     * Match open/close delimiter pairs in a token stream. Unmatched
     * openers/closers are converted to text tokens so they render
     * as literal characters.
     */
    private pairDelimiters;
}