/**
 * Try keeping this file pure, don't rely on other package or module.
 */
import { ClipboardItem } from '../clipboard-item.js';
export declare enum CLIPBOARD_MIMETYPE {
    HTML = "text/html",
    TEXT = "text/plain",
    BLOCKSUITE_PAGE = "blocksuite/page",
    BLOCKSUITE_SURFACE = "blocksuite/surface"
}
export declare function extractCustomDataFromHTMLString(type: CLIPBOARD_MIMETYPE, html: string): string | null | undefined;
export declare function getSurfaceClipboardData(e: ClipboardEvent): any;
export declare function isPureFileInClipboard(clipboardData: DataTransfer): boolean;
export declare function getFileFromClipboard(clipboardData: DataTransfer): File | undefined;
export declare function performNativeCopy(items: ClipboardItem[]): boolean;
export declare function createSurfaceClipboardItems(data: unknown): ClipboardItem[];
export declare function createHTMLStringForCustomData(data: string, type: CLIPBOARD_MIMETYPE): string;
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