public void Perform(IOperation operation)
{
AssertTransaction();
PerformingOperation?.Invoke(operation);
operation.TransactionId = transactionId;
if (saveIndex > currentIndex)
{
saveIndex = -1;
}
if (currentIndex == operations.Count)
{
operations.Add(operation);
currentIndex++;
}
else if (operation.IsChangingDocument)
{
operations.RemoveRange(currentIndex, operations.Count - currentIndex);
operations.Add(operation);
currentIndex = operations.Count;
}
else
{
operations.Insert(currentIndex, operation);
operations.Insert(currentIndex, operation);
currentIndex++;
}
Processors.Do(operation);
OnChange();
}