private void AddUndoableAction(TextBoxBase sender, UndoAction action)
{
if (action == UndoAction.Undo)
{
redoStack.Push(new UndoOperation(sender, action));
}
else
{
if (undoStack.Count > 0)
{
UndoOperation op = undoStack.Peek();
if ((op.Sender == sender) && (action == UndoAction.Merge))
{
// no-op
}
else
{
PushUndoOperation(sender, action);
}
}
else
{
PushUndoOperation(sender, action);
}
}
}
public void Redo()
{
if (redoStack.Count > 0)
{
UndoOperation op = redoStack.Pop();
op.Sender.Redo();
op.Sender.Focus();
}
}
public void Undo()
{
if (undoStack.Count > 0)
{
UndoOperation op = undoStack.Pop();
op.Sender.Undo();
op.Sender.Focus();
}
}