public void Redo()
{
if (!CanRedo())
{
return;
}
bool documentChanged = false;
int e = GetTransactionEndIndex();
while (currentIndex < e)
{
bool b = AnyChangingOperationWithinRange(currentIndex, e);
if (b && documentChanged)
{
break;
}
documentChanged |= b;
for (; currentIndex < e; currentIndex++)
{
Processors.Invert(operations[currentIndex]);
}
e = GetTransactionEndIndex();
}
OnChange();
}
public void RollbackTransaction()
{
AssertTransaction();
var index = transactionStartIndices.Peek();
if (currentIndex != index)
{
operations.RemoveRange(currentIndex, GetTransactionEndIndex() - currentIndex);
for (; currentIndex > index; currentIndex--)
{
Processors.Invert(operations[currentIndex - 1]);
}
}
}
public void Undo()
{
if (!CanUndo())
{
return;
}
bool documentChanged = false;
int s = GetTransactionStartIndex();
while (currentIndex > 0 && !documentChanged)
{
documentChanged |= AnyChangingOperationWithinRange(s, currentIndex);
for (; currentIndex > s; currentIndex--)
{
Processors.Invert(operations[currentIndex - 1]);
}
s = GetTransactionStartIndex();
}
OnChange();
}