import { Fragment } from 'prosemirror-model';
/** Сontains all data formats known to us */
export declare enum DataTransferType {
    Text = "text/plain",
    Html = "text/html",
    Yfm = "text/yfm",// self
    Rtf = "text/rtf",// Safari, WebStorm/Intelij
    UriList = "text/uri-list",
    VSCodeData = "vscode-editor-data",
    Files = "Files"
}
export declare function isIosSafariShare({ types }: DataTransfer): boolean;
export declare function isFilesOnly({ types }: DataTransfer): boolean;
export declare function isFilesFromHtml({ types }: DataTransfer): boolean;
export declare function isImageFile(file: File): boolean;
export declare function extractTextContentFromHtml(html: string): string | null;
type ContentBoundaryPositions = [
    firstNotEmptyPos: number,
    lastNotEmptyPos: number,
    firstPos: number,
    lastPos: number
];
export declare function findNotEmptyContentPosses(fragment: Fragment): ContentBoundaryPositions;
export declare function trimContent(fragment: Fragment, creatEmptyFragment?: () => Fragment): Fragment;
export {};