public static void EndUndoGroup()
{
if (m_undoStack.Count > 0)
{
BTUndoGroup oldGroup = m_undoStack.Peek() as BTUndoGroup;
if (oldGroup != null && oldGroup.IsOpen)
{
if (oldGroup.IsEmpty)
{
m_undoStack.Pop();
}
else
{
oldGroup.Close();
}
}
}
}
public static void RegisterUndo(BTUndoState undoState)
{
if (undoState != null && undoState.CanUndo)
{
if (m_undoStack.Count > 0)
{
BTUndoGroup topGroup = m_undoStack.Peek() as BTUndoGroup;
if (topGroup != null && topGroup.IsOpen)
{
topGroup.AddUndoState(undoState);
m_redoStack.Clear();
return;
}
}
m_undoStack.Push(undoState);
m_redoStack.Clear();
}
}
public static void BeginUndoGroup(string title)
{
if (m_undoStack.Count > 0)
{
BTUndoGroup oldGroup = m_undoStack.Peek() as BTUndoGroup;
if (oldGroup != null && oldGroup.IsOpen)
{
Debug.LogWarningFormat("You have to call BTUndoSystem.EndUndoGroup before begining a new group. Old group is '{0}', new group is '{1}'", oldGroup.Title, title);
if (oldGroup.IsEmpty)
{
m_undoStack.Pop();
}
else
{
oldGroup.Close();
}
}
}
BTUndoGroup group = new BTUndoGroup(title);
m_undoStack.Push(group);
}