import { Context } from "koa";
import { FilePointer } from "@sealcode/file-manager";
import { FlatTemplatable } from "tempstream";
import { FormDataValue } from "../form-types.js";
import { FormControlContext } from "./form-control.js";
import { SimpleInput } from "./simple-input.js";
export declare class File extends SimpleInput {
    getType(): string;
    renderFilePreview(_ctx: Context, file: FilePointer | null): Promise<FlatTemplatable>;
    preInput(fctx: FormControlContext, data: Record<string, FormDataValue>): Promise<string>;
    getInputAttributes(fctx: FormControlContext): Promise<Record<string, string | boolean>>;
}