import { CodeEditor } from '@jupyterlab/codeeditor';
import { IEditorLanguageRegistry } from '@jupyterlab/codemirror';
import { Contents } from '@jupyterlab/services';
import { TranslationBundle } from '@jupyterlab/translation';
import { Panel } from '@lumino/widgets';
import { MergeView } from 'nbdime/lib/common/mergeview';
import { Git } from '../../tokens';
/**
 * Diff callback to be registered for plain-text files.
 *
 * @param model Diff model
 * @param toolbar MainAreaWidget toolbar
 * @returns PlainText diff widget
 */
export declare const createPlainTextDiff: ({ editorFactory, languageRegistry, model, toolbar, translator }: Git.Diff.IFactoryOptions & {
    languageRegistry: IEditorLanguageRegistry;
    editorFactory?: CodeEditor.Factory | undefined;
}) => Promise<PlainTextDiff>;
/**
 * Plain Text Diff widget
 */
export declare class PlainTextDiff extends Panel implements Git.Diff.IDiffWidget {
    constructor({ model, languageRegistry, trans, editorFactory }: {
        model: Git.Diff.IModel;
        languageRegistry?: IEditorLanguageRegistry;
        editorFactory?: CodeEditor.Factory;
        trans?: TranslationBundle;
    });
    /**
     * Helper to determine if three-way diff should be shown.
     */
    private get _hasConflict();
    /**
     * Checks if the conflicted file has been resolved.
     */
    get isFileResolved(): boolean;
    /**
     * Diff model
     */
    get model(): Git.Diff.IModel;
    /**
     * Promise which fulfills when the widget is ready.
     */
    get ready(): Promise<void>;
    /**
     * Gets the file model of a resolved merge conflict,
     * and rejects if unable to retrieve.
     */
    getResolvedFile(): Promise<Partial<Contents.IModel>>;
    /**
     * Callback to create the diff widget once the widget
     * is attached so CodeMirror get proper size.
     */
    onAfterAttach(): void;
    /**
     * Refresh diff
     *
     * Note: Update the content and recompute the diff
     */
    refresh(): Promise<void>;
    /**
     * Create wrapper node
     */
    protected static createHeader(...labels: (string | undefined)[]): HTMLElement;
    /**
     * Create the Plain Text Diff view
     *
     * Note: baseContent will only be passed when displaying
     *       a three-way merge conflict.
     */
    protected createDiffView(challengerContent: string, referenceContent: string, baseContent?: string | null): Promise<void>;
    /**
     * Display an error instead of the file diff
     *
     * @param error Error object
     */
    protected showError(error: Error): void;
    protected _editorFactory: CodeEditor.Factory;
    protected _isReady: Promise<void>;
    protected _mergeView: MergeView;
    protected _model: Git.Diff.IModel;
    protected _trans: TranslationBundle;
    private _reference;
    private _challenger;
    private _languageRegistry;
    private _base;
}
/**
 * Diff status
 */
declare enum DiffStatus {
    Equal,
    Delete,
    Insert
}
/**
 * Diff type
 */
type Diff = [DiffStatus, string];
export {};