import { IKernel, KernelMessage } from 'jupyter-js-services';
import { IDisposable } from 'phosphor-disposable';
import { BaseCellWidget } from '../cells/widget';
import { CellEditorWidget, ITextChange, ICompletionRequest } from '../cells/editor';
import { CompletionWidget } from './widget';
/**
 * A completion handler for cell widgets.
 */
export declare class CellCompletionHandler implements IDisposable {
    /**
     * Construct a new completion handler for a widget.
     */
    constructor(completion: CompletionWidget);
    /**
     * The kernel used by the completion handler.
     */
    kernel: IKernel;
    /**
     * The cell widget used by the completion handler.
     */
    activeCell: BaseCellWidget;
    /**
     * Get whether the completion handler is disposed.
     *
     * #### Notes
     * This is a read-only property.
     */
    isDisposed: boolean;
    /**
     * Dispose of the resources used by the handler.
     */
    dispose(): void;
    /**
     * Make a completion request using the kernel.
     */
    protected makeRequest(request: ICompletionRequest): Promise<void>;
    /**
     * Receive a completion reply from the kernel.
     */
    protected onReply(pending: number, request: ICompletionRequest, msg: KernelMessage.ICompleteReplyMsg): void;
    /**
     * Handle a text changed signal from an editor.
     */
    protected onTextChanged(editor: CellEditorWidget, change: ITextChange): void;
    /**
     * Handle a completion requested signal from an editor.
     */
    protected onCompletionRequested(editor: CellEditorWidget, request: ICompletionRequest): void;
    /**
     * Handle a completion selected signal from the completion widget.
     */
    protected onCompletionSelected(widget: CompletionWidget, value: string): void;
    private _activeCell;
    private _completion;
    private _kernel;
    private _pending;
}