/// <reference types="node" />
import { EventEmitter } from "events";
import { JupyterKernel } from "./jupyter";
import { CodeExecutionEmitterInterface, ExecOpts, StdinFunction } from "@cocalc/frontend/jupyter/project-interface";
export declare class CodeExecutionEmitter extends EventEmitter implements CodeExecutionEmitterInterface {
    readonly kernel: JupyterKernel;
    readonly code: string;
    readonly id?: string;
    readonly stdin?: StdinFunction;
    readonly halt_on_error: boolean;
    private iopub_done;
    private shell_done;
    private state;
    private all_output;
    private _message;
    private _go_cb;
    private timeout_ms?;
    private timer?;
    private killing;
    constructor(kernel: JupyterKernel, opts: ExecOpts);
    emit_output(output: object): void;
    cancel(): void;
    close(): void;
    throw_error(err: any): void;
    _handle_stdin(mesg: any): Promise<void>;
    _handle_shell(mesg: any): void;
    private set_shell_done;
    private set_iopub_done;
    _handle_iopub(mesg: any): void;
    private handle_closed;
    _finish(): void;
    _push_mesg(mesg: any): void;
    go(): Promise<object[]>;
    _go(cb: Function): void;
    private timeout;
}