import { IDisposable } from 'phosphor-disposable';
import { IKernel } from 'jupyter-js-services';
/**
 * The definition of a console history manager object.
 */
export interface IConsoleHistory extends IDisposable {
    /**
     * The current kernel supplying navigation history.
     */
    kernel: IKernel;
    /**
     * Get the previous item in the console history.
     *
     * @returns A Promise for console command text or `undefined` if unavailable.
     */
    back(): Promise<string>;
    /**
     * Get the next item in the console history.
     *
     * @returns A Promise for console command text or `undefined` if unavailable.
     */
    forward(): Promise<string>;
    /**
     * Add a new item to the bottom of history.
     *
     * @param item The item being added to the bottom of history.
     *
     * #### Notes
     * If the item being added is undefined or empty, it is ignored. If the item
     * being added is the same as the last item in history, it is ignored as well
     * so that the console's history will consist of no contiguous repetitions.
     * This behavior varies from some shells, but the Jupyter Qt Console is
     * implemented this way.
     */
    push(item: string): void;
}
/**
 * A console history manager object.
 */
export declare class ConsoleHistory implements IConsoleHistory {
    /**
     * Get whether the console history manager is disposed.
     *
     * #### Notes
     * This is a read-only property.
     */
    isDisposed: boolean;
    /**
     * The current kernel supplying navigation history.
     */
    kernel: IKernel;
    /**
     * Construct a new console history object.
     */
    constructor(kernel: IKernel);
    /**
     * Get the previous item in the console history.
     *
     * @returns A Promise for console command text or `undefined` if unavailable.
     */
    back(): Promise<string>;
    /**
     * Dispose of the resources held by the console history manager.
     */
    dispose(): void;
    /**
     * Get the next item in the console history.
     *
     * @returns A Promise for console command text or `undefined` if unavailable.
     */
    forward(): Promise<string>;
    /**
     * Add a new item to the bottom of history.
     *
     * @param item The item being added to the bottom of history.
     *
     * #### Notes
     * If the item being added is undefined or empty, it is ignored. If the item
     * being added is the same as the last item in history, it is ignored as well
     * so that the console's history will consist of no contiguous repetitions.
     * This behavior varies from some shells, but the Jupyter Qt Console is
     * implemented this way.
     */
    push(item: string): void;
    private _cursor;
    private _history;
    private _kernel;
}