import type { IAction, IActorArgs, IActorOutput, IActorTest, Mediate } from '@comunica/core';
import { Actor } from '@comunica/core';
import type * as RDF from '@rdfjs/types';
/**
 * A comunica actor for rdf-parse-html events.
 *
 * Actor types:
 * * Input:  IActionRdfParseHtml:      Callbacks for parsing results.
 * * Test:   <none>
 * * Output: IActorRdfParseHtmlOutput: An HTML event listeners.
 *
 * @see IActionRdfParseHtml
 * @see IActorRdfParseHtmlOutput
 */
export declare abstract class ActorRdfParseHtml<TS = undefined> extends Actor<IActionRdfParseHtml, IActorTest, IActorRdfParseHtmlOutput, TS> {
    /**
     * @param args -
     *   \ @defaultNested {<default_bus> a <cc:components/Bus.jsonld#Bus>} bus
     *   \ @defaultNested {RDF HTML parsing failed: none of the configured parsers were able to parse RDF in HTML} busFailMessage
     */
    constructor(args: IActorRdfParseHtmlArgs<TS>);
}
export interface IActionRdfParseHtml extends IAction {
    /**
     * The base IRI.
     */
    baseIRI: string;
    /**
     * The headers with which the RDF document should be parsed.
     */
    headers?: Headers;
    /**
     * This function can be called whenever a quad has been parsed.
     * @param {Quad} quad A parsed quad.
     */
    emit: (quad: RDF.Quad) => void;
    /**
     * This function can be called when an error occurs.
     * @param {Error} error An error.
     */
    error: (error: Error) => void;
    /**
     * This function must be called when parsing is complete.
     */
    end: () => void;
}
export interface IActorRdfParseHtmlOutput extends IActorOutput {
    /**
     * A listener for HTML parse events.
     */
    htmlParseListener: IHtmlParseListener;
}
/**
 * An HTML parsing listener.
 */
export interface IHtmlParseListener {
    /**
     * Called when a tag is opened.
     * @param {string} name The tag name.
     * @param {{[p: string]: string}} attributes A hash of attributes.
     */
    onTagOpen: (name: string, attributes: Record<string, string>) => void;
    /**
     * Called when a tag is closed.
     */
    onTagClose: () => void;
    /**
     * Called when text contents are parsed.
     * Note that this can be called multiple times per tag,
     * when for example the string is spread over multiple chunks.
     * @param {string} data A string.
     */
    onText: (data: string) => void;
    /**
     * Called when parsing has ended.
     */
    onEnd: () => void;
}
export type IActorRdfParseHtmlArgs<TS = undefined> = IActorArgs<IActionRdfParseHtml, IActorTest, IActorRdfParseHtmlOutput, TS>;
export type MediatorRdfParseHtml = Mediate<IActionRdfParseHtml, IActorRdfParseHtmlOutput>;