public void PushUndo(UndoObject uo)
{
if (IsEnabled)
{
_undoStack.PushOrCollapse(uo);
_redoStack.Clear();
}
}
public void PushUndo(UndoObject uo)
{
if (_framework.IsEnabled)
{
_framework.PushUndo(uo);
OnPropertyChanged(nameof(RedoTitle));
OnPropertyChanged(nameof(UndoTitle));
}
}
public Result Redo()
{
if (_redoStack.Count > 0)
{
UndoObject uo = _redoStack.Pop();
Disable();
Result r = uo.Redo();
Enable();
if (r.Type == ResultType.Good && IsEnabled)
{
_undoStack.Push(uo);
}
return(r);
}
else
{
return(new Result(ResultType.Bad, "Nothing to redo."));
}
}
public virtual bool Collapse(UndoObject uo)
{
return(CanCollapse(uo));
}
public virtual bool CanCollapse(UndoObject uo)
{
return(IsCollapsible && uo != null && uo.IsCollapsible && (_undoContext as CollapsibleUndoContext).ContextReference == (uo._undoContext as CollapsibleUndoContext).ContextReference);
}