import { type AcExSnapshotV1 } from '@mlightcad/cad-html-exporter';
/**
 * Orchestrates export of the active drawing to a downloadable HTML file.
 *
 * Workflow:
 * 1. Build a display-only {@link AcExSnapshotV1} from the current scene and database.
 * 2. Fetch the IIFE viewer runtime (inlined into the HTML).
 * 3. Package snapshot + runtime via `packHtml` and trigger a browser download.
 *
 * A busy indicator is shown for the duration of the operation. The UI thread
 * is yielded between heavy steps so the browser can repaint.
 */
export declare class AcApHtmlConvertor {
    /** Collects geometry and metadata from the live Three.js scene. */
    private readonly _snapshotBuilder;
    /**
     * Exports the document currently open in {@link AcApDocManager}.
     *
     * @param fileName - Optional base name for the download (without extension).
     *   When omitted, the active document's `fileName` is used. A `.html` suffix
     *   is always applied; `.dwg` / `.dxf` suffixes on the input are stripped.
     * @returns Resolves when packaging and download complete.
     */
    convert(fileName?: string): Promise<void>;
    /**
     * Packages a pre-built snapshot into HTML and downloads it.
     *
     * Skips scene collection; useful for tests, CLI tooling, or re-exporting a
     * snapshot produced elsewhere.
     *
     * @param snapshot - Complete v1 snapshot to embed in the HTML.
     * @param downloadName - File name passed to the browser download API (should
     *   include the `.html` extension).
     * @returns Resolves when packaging and download complete.
     */
    packSnapshot(snapshot: AcExSnapshotV1, downloadName: string): Promise<void>;
    /**
     * Fetches the offline viewer runtime as source text for inlining.
     *
     * @param url - Absolute or relative URL of `viewer-runtime.iife.js`. When
     *   omitted, {@link DEFAULT_RUNTIME_URL} is used.
     * @returns The runtime script body as a string.
     * @throws If the HTTP response is not OK (missing build artifact, CORS, etc.).
     */
    private loadViewerRuntime;
    /**
     * Derives the browser download file name from a drawing file name.
     *
     * @param fileName - Source drawing name (may include `.dwg` or `.dxf`).
     * @returns Base name without drawing extension, plus `.html`.
     */
    private resolveDownloadName;
    /**
     * Triggers a client-side download of the generated HTML string.
     *
     * @param content - Full HTML document text.
     * @param downloadName - Value for the anchor `download` attribute.
     */
    private downloadHtml;
}
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