/// <summary>
/// Ends the transaction under which all undo/redo operations take place
/// </summary>
/// <param name="tran"></param>
public void EndTransaction(UndoRedoTransaction tran)
{
if (m_CurTran == tran)
{
m_CurTran = null;
///now we might have had no items added to undo and redo stack as a part of this transaction. Check empty transaction at top and remove them
if (m_UndoStack.Count > 0)
{
UndoRedoTransaction t = m_UndoStack[0] as UndoRedoTransaction;
if (t != null && t.OperationsCount == 0)
{
m_UndoStack.Pop();
}
}
if (m_RedoStack.Count > 0)
{
UndoRedoTransaction t = m_RedoStack[0] as UndoRedoTransaction;
if (t != null && t.OperationsCount == 0)
{
m_RedoStack.Pop();
}
}
}
}
/// <summary>
/// Starts a transaction under which all undo redo operations take place
/// </summary>
/// <param name="tran"></param>
public void StartTransaction(UndoRedoTransaction tran)
{
if (m_CurTran == null)
{
m_CurTran = tran;
///push an empty undo operation
m_UndoStack.Push(new UndoRedoTransaction(tran.Name));
m_RedoStack.Push(new UndoRedoTransaction(tran.Name));
}
}