/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Released under MIT see LICENSE.txt in the project root for license information.
 * Copyright (c) 2013-2021 Valeriy Chupurnov. All rights reserved. https://xdsoft.net
 */
import type { IJodit, SnapshotType } from '../../types';
import { ViewComponent } from '../../core/component';
import { Snapshot } from './snapshot';
import { Stack } from './stack';
declare module '../../config' {
    interface Config {
        observer: {
            maxHistoryLength: number;
            timeout: number;
        };
    }
}
export declare class Observer extends ViewComponent<IJodit> {
    className(): string;
    private __startValue;
    get startValue(): SnapshotType;
    set startValue(value: SnapshotType);
    stack: Stack;
    snapshot: Snapshot;
    private updateTick;
    upTick(): void;
    private onChange;
    private updateStack;
    redo(): void;
    undo(): void;
    clear(): void;
    replaceSnapshot(): void;
    private fireChangeStack;
    constructor(editor: IJodit);
    destruct(): void;
}