import { FileData } from '../FileData.js';
/**
 * File utilities
 */
export declare class FileUtils {
    private constructor();
    /**
     * Determines whether specified file is an image
     * @param {File | FileData} file File
     * @returns {Promise<boolean>} Promise which resolves to a boolean value indicating whether specified file is an image
     */
    static isSupportedImageFileType(file: File | FileData): Promise<boolean>;
    /**
     * Determines whether specified file is a PDF
     * @param {File | FileData} file File
     * @returns {Promise<boolean>} Promise which resolves to a boolean value indicating whether specified file is a PDF
     */
    static isSupportedPdfFileType(file: File | FileData): Promise<boolean>;
    /**
     * Determines whether specified file is an Office document
     * @param {File | FileData} file File
     * @returns {Promise<boolean>} Promise which resolves to a boolean value indicating whether specified file is an Office document
     */
    static isSupportedOfficeFileType(file: File | FileData): Promise<boolean>;
    /**
     * Determines file type
     * @param {File | FileData} file File
     * @returns {Promise<FileType>} Promise which resolves to file type
     */
    static determineFileType(file: File | FileData): Promise<FileUtils.FileType>;
    private static determineFileTypeFromUint8Array;
}
export declare namespace FileUtils {
    /**
     * File type
     * @enum {number}
     */
    enum FileType {
        /**
         * Other (unsupported) file format
         */
        Other = 0,
        /**
         * Office binary format
         */
        OfficeBin = 1,
        /**
         * RTF
         */
        RTF = 2,
        /**
         * Word 2.0
         */
        Word20 = 3,
        /**
         * XML
         */
        XML = 4,
        /**
         * PDF
         */
        PDF = 5,
        /**
         * ZIP (or Office XML)
         */
        ZIP = 6,
        /**
         * BMP
         */
        BMP = 7,
        /**
         * GIF
         */
        GIF = 8,
        /**
         * JPEG
         */
        JPEG = 9,
        /**
         * PNG
         */
        PNG = 10,
        /**
         * TIFF
         */
        TIFF = 11,
        /**
         * EXE (Windows executable)
         */
        EXE = 12,
        /**
         * ELF (Linux executable)
         */
        ELF = 13
    }
}