/// <summary>
/// Starts new multi-action undo/redo step.
/// </summary>
/// <param name="name">Name of undo/redo step.</param>
/// <returns>Temporary disposable object to dispose when step is finished.</returns>
public IDisposable BeginMultiActionsUndoRedoStep(string name)
{
Debug.Assert(CurrentStep == null, "It is not possible to begin new undo-redo step until finish current.");
CurrentStep = new UndoRedoStep(name);
return(new DisposableAction(
() =>
{
AddUndoStep(CurrentStep);
CurrentStep = null;
}));
}
/// <summary>
/// Adds redo step to redo stack.
/// </summary>
/// <param name="step">Redo step to add.</param>
protected void AddRedoStep(UndoRedoStep step)
{
redoSteps.Push(step);
OnStateChanged();
}