import { AbstractWraplet, Constructable } from "wraplet";
import { DocumentAlterer } from "./types/DocumentAlterer";
import { KeyValueStorage } from "wraplet/storage";
import { PreviewWraplet } from "./types/PreviewWraplet";
export type ExhibitionPreviewOptions = {
    updateHeight?: boolean;
    updateHeightCallback?: (preview: ExhibitionPreview) => Promise<void>;
};
export declare class ExhibitionPreview extends AbstractWraplet<HTMLIFrameElement> implements PreviewWraplet {
    private alterers;
    private currentBlobUrl;
    private options;
    constructor(element: HTMLIFrameElement, options?: ExhibitionPreviewOptions, optionsStorage?: KeyValueStorage<Partial<ExhibitionPreviewOptions>>);
    protected supportedNodeTypes(): readonly Constructable<HTMLIFrameElement>[];
    /**
     * Adds a DocumentAlterer to the preview.
     * @param alterer
     * @param priority
     *   Priority of the alterer. Higher priority alterers are executed first.
     */
    addDocumentAlterer(alterer: DocumentAlterer, priority?: number): void;
    /**
     * Checks if alterer is already registered.
     * @param alterer
     */
    hasDocumentAlterer(alterer: DocumentAlterer): boolean;
    removeDocumentAlterer(alterer: DocumentAlterer): void;
    update(): Promise<void>;
    removeIFrame(): void;
    /**
     * Updates preview's height to match its content.
     */
    updateHeight(): void;
    private getIFrameDocument;
    private getIFrameWindow;
}