import './index.css';
/**
 * Custom HTML element (`<pdf-live>`) that provides a full-featured PDF viewer.
 *
 * Extends `HTMLElement` and registers itself as a Web Component via `customElements.define()`.
 * The viewer includes a toolbar with zoom controls, page navigation, print/download buttons,
 * a dark/light theme toggle, a thumbnail side panel, and optional password protection.
 *
 * @example
 * ```html
 * <pdf-live src="document.pdf" worker="pdf.worker.js" lang="en"></pdf-live>
 * ```
 *
 * @fires pageChange - Emitted when the visible page changes. Listener receives the 1-based page number.
 * @fires documentLoaded - Emitted when the PDF document has finished loading and rendering.
 * @fires passwordEnter - Emitted when the user submits a password (only for password-protected documents).
 */
declare class PDFLiveElement extends HTMLElement {
    /** Full-screen loading spinner overlay. */
    private readonly loading;
    /** Error modal for displaying critical error messages. */
    private readonly errorModal;
    /** Password entry modal for protected documents. */
    private readonly passwordModal;
    /** Locale resource for the current language. */
    private readonly language;
    /** Whether the PDF document has finished loading and rendering. */
    private loaded;
    /** Whether the `documentLoaded` listener has already been invoked (prevents double invocation). */
    private calledLoadListener;
    /** Page navigation controller (initialized after pages are rendered). */
    private pageNav;
    /** Title element in the header toolbar. */
    private readonly documentTitle;
    /** Print button in the header toolbar. */
    private readonly printButton;
    /** Download button in the header toolbar. */
    private readonly downloadButton;
    /** Theme toggle button in the header toolbar. */
    private readonly themeChangeButton;
    /** Registered event listeners keyed by event type. */
    private readonly listeners;
    /** URL of the currently loaded PDF document. */
    private documentUrl;
    /** The pdf.js document proxy for the loaded PDF. */
    private pdfDocument;
    /**
     * Constructs the PDF viewer element.
     *
     * Restores the saved theme (unless the `restoretheme="false"` attribute is set),
     * loads the locale resource, renders the viewer HTML skeleton, and initializes
     * references to key DOM elements.
     */
    constructor();
    /**
     * Custom element lifecycle callback invoked when the element is inserted into the DOM.
     *
     * Loads the PDF document, handles password protection if required,
     * renders all pages, initializes zoom/page/thumbnail navigation,
     * and binds toolbar button event handlers.
     */
    protected connectedCallback(): Promise<void>;
    /**
     * Registers the `<pdf-live>` custom element with the browser if not already registered.
     *
     * @returns The `PDFLiveElement` class itself for chaining.
     */
    static define(): typeof PDFLiveElement;
    /**
     * Convenience factory that registers the custom element (if needed) and creates a new instance.
     *
     * @returns A new `PDFLiveElement` instance.
     */
    static createElement(): PDFLiveElement;
    /**
     * Registers an event listener for the specified event type.
     *
     * Supported events:
     * - `"pageChange"` — Fired when the visible page changes. Listener receives the 1-based page number.
     * - `"documentLoaded"` — Fired when the PDF has finished loading. If already loaded, invoked immediately.
     * - `"passwordEnter"` — Fired when the user submits a password. Listener receives the password string.
     *
     * @param type     - The event type to listen for.
     * @param listener - The callback function.
     * @returns This instance for chaining.
     * @throws Error if the event type is not one of the supported types.
     */
    on(type: 'pageChange' | 'documentLoaded' | 'passwordEnter', listener: Function): PDFLiveElement;
    /**
     * Returns the page number currently displayed in the viewer.
     *
     * @returns The current 1-based page number.
     */
    getCurrentPageNumber(): number;
    /**
     * Renders the viewer HTML skeleton using Handlebars templates.
     *
     * On mobile viewports (width <= {@link constants.MINIMUM_MOBILE_WIDTH}),
     * the thumbnail panel starts in the closed state.
     */
    private render;
    /**
     * Prints the currently loaded PDF document.
     *
     * Opens the browser's print dialog with the PDF loaded in a hidden iframe.
     */
    print(): Promise<void>;
    /**
     * Downloads the currently loaded PDF document.
     *
     * Uses the `title` attribute as the filename if set; otherwise extracts
     * the filename from the document URL. Appends a `.pdf` extension if missing.
     */
    download(): Promise<void>;
}
export default PDFLiveElement;