import { BaseFileComponent } from '../_common';
/**
 * @tagname %%prefix%%-file-reader
 * @beta
 *
 * @fires file-read - Fired when file content is successfully read
 * @fires error - Fired on validation or read/parse errors
 * @fires clear - Fired when selection is cleared (from base)
 */
export declare class FileReader extends BaseFileComponent {
    private processingTimeout;
    autoProcess: boolean;
    processingDelayMs: number;
    fileContent: any;
    onFileRead?: (data: any) => void;
    constructor();
    /**
     * Handles file selection and validation
     * @beta - Currently supports single JSON files only. Future versions will support multiple files and additional file types.
     * @param files - The selected files
     */
    protected onFileSelected(files: File[]): void;
    protected onFileCleared(): void;
    /**
     * Processes the selected file and parses its content
     * For JSON files, attempts to parse the content and emit processed data
     * Sets processing state and handles errors appropriately
     */
    handleFileProcessing(): Promise<void>;
    /**
     * Gets the current file content for external access
     * @returns The parsed file content or null if no file is processed
     */
    getFileContent(): any;
    /**
     * Disconnected callback to clean up timeouts
     */
    disconnectedCallback(): void;
}
/**
 * The Foundation File Reader
 *
 * @public
 * @beta
 * @remarks
 * HTML Element: \<foundation-file-reader\>
 *
 * A component for selecting and processing files locally without uploading to server.
 * Primarily designed for JSON file processing with optional auto-processing capabilities.
 */
export declare const foundationFileReader: (overrideDefinition?: import("@microsoft/fast-foundation").OverrideFoundationElementDefinition<import("@microsoft/fast-foundation").FoundationElementDefinition>) => import("@microsoft/fast-foundation").FoundationElementRegistry<import("@microsoft/fast-foundation").FoundationElementDefinition, typeof FileReader>;
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