import { IUndoRedoStep, UndoRedoStep } from './undoRedoStep';
import { UndoRedoRecord } from './types';
export interface IUndoRedoStepManager<T> {
    readonly isMin: boolean;
    readonly isMax: boolean;
    getStep(index: number): IUndoRedoStep<T> | undefined;
    addStep(step: IUndoRedoStep<T>): void;
    undoStep(): IUndoRedoStep<T> | undefined;
    redoStep(): IUndoRedoStep<T> | undefined;
}
export declare class UndoRedoStepManager implements IUndoRedoStepManager<UndoRedoRecord> {
    private static readonly _initialCapacity;
    private static readonly _initialUndoIndex;
    private static readonly _initialRedoIndex;
    private _stepList;
    private _capacity;
    private _undoIndex;
    private _redoIndex;
    constructor(capacity: number);
    get isMin(): boolean;
    get isMax(): boolean;
    getStep(index?: number): UndoRedoStep | undefined;
    addStep(step: UndoRedoStep): void;
    undoStep(): UndoRedoStep | undefined;
    redoStep(): UndoRedoStep | undefined;
}