public void Undo(Action <HistoryEntry> undo)
{
if (StackUndo.Count > 0)
{
HistoryEntry last = StackUndo.Pop();
undo.Invoke(last);
StackRedo.Push(last);
}
}
public IObservable <HistoryEntry> Undo(Func <HistoryEntry, IObservable <HistoryEntry> > discard)
{
if (StackUndo.Count == 0)
{
throw new Exception();
}
UpdateSubjects(true);
return(discard(StackUndo.Pop()).Do(entry =>
{
StackRedo.Push(entry);
UpdateSubjects();
}));
}
/// <summary>
/// Добавить команду в стек команд, которые можно выполнить повторно
/// </summary>
public void AddInRedo(CommandUndoRedo command)
{
StackRedo.Push(command);
}