/****************************************************************************
 * Copyright 2021 EPAM Systems
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ***************************************************************************/
import type { Command } from "../../domain/entities/Command";
import type { CoreEditor } from './Editor';
export declare type HistoryOperationType = 'undo' | 'redo';
export declare class EditorHistory {
    historyStack: Command[] | [];
    historyPointer: number;
    editor: CoreEditor;
    private static _instance;
    constructor(editor: CoreEditor);
    static getInstance(editor: CoreEditor): EditorHistory;
    private static isInstance;
    update(command: Command, megreWithLatestHistoryCommand?: boolean): void;
    undo(): void;
    redo(): void;
    get previousCommand(): Command;
    destroy(): void;
}