import { IKernel, KernelMessage } from 'jupyter-js-services';
import { IDisposable } from 'phosphor-disposable';
import { ISignal } from 'phosphor-signaling';
import { IListChangedArgs } from '../../common/observablelist';
import { nbformat } from '../notebook/nbformat';
/**
 * An model that maintains a list of output data.
 */
export declare class OutputAreaModel implements IDisposable {
    /**
     * Construct a new observable outputs instance.
     */
    constructor();
    /**
     * A signal emitted when the model changes.
     */
    changed: ISignal<OutputAreaModel, IListChangedArgs<OutputAreaModel.Output>>;
    /**
     * A signal emitted when the model is disposed.
     */
    disposed: ISignal<OutputAreaModel, void>;
    /**
     * Get the length of the items in the model.
     *
     * #### Notes
     * This is a read-only property.
     */
    length: number;
    /**
     * Test whether the model is disposed.
     *
     * #### Notes
     * This is a read-only property.
     */
    isDisposed: boolean;
    /**
     * Dispose of the resources used by the model.
     */
    dispose(): void;
    /**
     * Get an item at the specified index.
     */
    get(index: number): OutputAreaModel.Output;
    /**
     * Add an output, which may be combined with previous output.
     *
     * #### Notes
     * The output bundle is copied.
     * Contiguous stream outputs of the same `name` are combined.
     */
    add(output: OutputAreaModel.Output): number;
    /**
     * Clear all of the output.
     *
     * @param wait Delay clearing the output until the next message is added.
     */
    clear(wait?: boolean): OutputAreaModel.Output[];
    /**
     * Execute code on a kernel and send outputs to the model.
     */
    execute(code: string, kernel: IKernel): Promise<KernelMessage.IExecuteReplyMsg>;
    /**
     * Handle a change to the list.
     */
    private _onListChanged(sender, args);
    private _clearNext;
    private _list;
}
/**
 * A namespace for OutputAreaModel statics.
 */
export declare namespace OutputAreaModel {
    /**
     * Output for an input request from the kernel.
     */
    interface IInputRequest {
        /**
         * Type of cell output.
         */
        output_type: 'input_request';
        /**
         * The text to show at the prompt.
         */
        prompt: string;
        /**
         * Whether the request is for a password.
         * If so, the frontend shouldn't echo input.
         */
        password: boolean;
        /**
         * The kernel that made the request, used to send an input response.
         */
        kernel: IKernel;
    }
    /**
     * A valid output area item.
     */
    type Output = nbformat.IOutput | IInputRequest;
}