/**
 * Interface defining methods for visiting different types of HTML nodes.
 * Each method corresponds to a specific HTML element type and returns its Markdown representation.
 */
export interface HTMLNodeVisitor {
    /** Converts a text node to Markdown */
    visitText(node: Text): string;
    /** Converts an anchor element to Markdown link syntax */
    visitLink(node: HTMLAnchorElement): string;
    /** Converts a header element to Markdown heading syntax */
    visitHeader(node: HTMLElement, level: number): string;
    /** Converts a paragraph element to Markdown */
    visitParagraph(node: HTMLElement): string;
    /** Converts formatting elements (bold, italic, etc.) to Markdown */
    visitFormatting(node: HTMLElement): string;
    /** Converts code elements to Markdown inline code syntax */
    visitCode(node: HTMLElement): string;
    /** Handles generic HTML elements with no specific Markdown conversion */
    visitGeneric(node: HTMLElement): string;
    /** Converts an HTML div element to Markdown format, adding a single newline */
    visitDiv(node: HTMLElement): string;
    /** Converts an HTML br element to a newline in Markdown */
    visitBr(): string;
    /** Converts a table row element to Markdown */
    visitTableRow(node: HTMLTableRowElement): string;
    /** Converts an HTML table element to Markdown table format */
    visitTable(node: HTMLTableElement): string;
    /** Convert img tag to Markdown image format */
    visitImage(node: HTMLImageElement): string;
}
/**
 * Main converter class that implements the visitor interface to convert HTML to Markdown.
 * Uses the Chain of Responsibility pattern for handling different node types.
 */
export declare class MarkdownConverter implements HTMLNodeVisitor {
    private handler;
    constructor();
    /**
     * Converts a text node to Markdown, escaping special characters.
     */
    visitText(node: Text): string;
    /**
     * Converts an HTML anchor element to Markdown link syntax.
     */
    visitLink(node: HTMLAnchorElement): string;
    /**
     * Converts an HTML heading element to Markdown heading syntax.
     */
    visitHeader(node: HTMLElement, level: number): string;
    /**
     * Converts an HTML paragraph to Markdown format.
     */
    visitParagraph(node: HTMLElement): string;
    /**
     * Applies Markdown formatting (bold, italic, etc.) to text content.
     */
    visitFormatting(node: HTMLElement): string;
    /**
     * Converts HTML code elements to Markdown inline code syntax.
     */
    visitCode(node: HTMLElement): string;
    /**
     * Handles generic HTML elements by processing their children.
     */
    visitGeneric(node: HTMLElement): string;
    /**
     * Converts an HTML div element to Markdown format, adding a single newline.
     */
    visitDiv(node: HTMLElement): string;
    /**
     * Converts an HTML br element to a newline in Markdown.
     */
    visitBr(): string;
    /**
     * Converts an HTML table row element to Markdown table row format.
     */
    visitTableRow(node: HTMLTableRowElement): string;
    /**
     * Converts an HTML table element to Markdown table format.
     */
    visitTable(node: HTMLTableElement): string;
    /**
     * Converts img tag to Markdown image format
     */
    visitImage(node: HTMLImageElement): string;
    /**
     * Processes a single node using the handler chain.
     */
    processNode(node: Node): string;
    /**
     * Creates and links together handlers in a specific order implementing the Chain of Responsibility pattern.
     * @returns The first handler in the chain
     */
    private setupHandlerChain;
    /**
     * Recursively collects and processes text content from a node and its children.
     */
    private collectTextContent;
    /**
     * Collects raw text content from code elements.
     */
    private collectCodeContent;
    /**
     * Processes all child nodes of a given node.
     */
    private processChildren;
    /**
     * Gets the first handler in the chain.
     */
    private getHandler;
}