import type { UndoManager, UndoItem } from '../../../types';
import type { UiLifeCycles } from '../../types';
/**
 * A DOM-based undo manager. Integrates with native undo/redo functionality of
 * the browser. Supports user Ctrl+Z and Ctrl+Shift+Z shortcuts and application
 * context menu undo/redo events.
 */
export declare class WebUndo implements UndoManager, UiLifeCycles {
    /** Whether we are in a process of pushing a new undo item. */
    private _push;
    /** The DOM element, which keeps text content for native undo/redo integration. */
    protected el: HTMLElement;
    /** Undo stack. */
    uStack: UndoItem[];
    /** Redo stack. */
    rStack: UndoItem[];
    protected _undo(): void;
    protected _redo(): void;
    push<U, R>(undo: UndoItem<U, R>): void;
    undo(): void;
    redo(): void;
    /** -------------------------------------------------- {@link UiLifeCycles} */
    start(): () => void;
    readonly onFocus: () => void;
    readonly onInput: () => void;
}