import React from 'react';
import type { PdfFocusHandler as PdfFocusHandler } from '../view/VirtualizedPdf.js';
import type { PdfDocument } from '../types/document.js';
export declare const zoomLevels: string[];
declare const usePDFViewer: (file: PdfDocument) => {
    scrolledIndex: number;
    setCurrentPageNumber: (n: number) => void;
    scale: number;
    setScaleFit: React.Dispatch<React.SetStateAction<number>>;
    numPages: number;
    setNumPages: React.Dispatch<React.SetStateAction<number>>;
    handleZoomIn: () => void;
    handleZoomOut: () => void;
    nextPage: () => void;
    prevPage: () => void;
    scaleText: string;
    isPdfRendered: boolean;
    setIsPdfRendered: React.Dispatch<React.SetStateAction<boolean>>;
    pdfFocusRef: React.MutableRefObject<PdfFocusHandler | null>;
    goToPage: (page: number) => void;
    setZoomLevel: (zoomLevel: string) => void;
    zoomInEnabled: boolean;
    zoomOutEnabled: boolean;
};
export default usePDFViewer;