public void Reset()
{
UndoCommands.Clear();
RedoCommands.Clear();
UpdateHistory();
}
internal void UndoRedoStacksChanged()
{
UndoCommands.Refresh();
OnPropertyChanged(nameof(UndoCommands));
RedoCommands.Refresh();
OnPropertyChanged(nameof(RedoCommands));
}
private void Overflow()
{
if (UndoCommands.Count <= MaxCommand)
{
return;
}
UndoCommands.RemoveLast();
}
public static void Redo()
{
if (RedoCommands.Count > 0)
{
ICommand temp = RedoCommands.Peek();
temp.Execute();
UndoCommands.Push(temp);
RedoCommands.Pop();
}
}
public static void Undo()
{
if (UndoCommands.Count > 0)
{
ICommand temp = UndoCommands.Peek();
temp.Undo();
RedoCommands.Push(temp);
UndoCommands.Pop();
}
}
private void Add()
{
if (m_currentCommand == null)
{
return;
}
RedoCommands.Clear();
UndoCommands.AddFirst(m_currentCommand.Clone());
Overflow();
UpdateHistory();
}
public ICommand Redo()
{
if (RedoCommands.Count == 0)
{
return(null);
}
ICommand command = RedoCommands.Pop();
UndoCommands.AddFirst(command);
command.Redo();
UpdateHistory();
return(command);
}
public ICommand Undo()
{
if (UndoCommands.Count == 0)
{
return(null);
}
ICommand command = UndoCommands.First.Value;
command.Undo();
RedoCommands.Push(command);
UndoCommands.RemoveFirst();
UpdateHistory();
return(command);
}
