protected void InvokeRootSequence()
{
switch (SequenceInvokationList.Count)
{
case 0:
Debug.Assert(FieldList.Count == 0, "FieldList.Count > 0 when no sequence invokations");
rootSequenceInvokation = SequenceInvokationList.New(rootSequence, 0);
for (int i = 0; i < rootSequenceInvokation.FieldCount; i++)
{
FieldList.Add(rootSequenceInvokation.GetField(i));
}
break;
case 1:
// if 1, then root is only invoked sequence
ResetAllFieldValues();
break;
default:
FtSequenceInvokation secondInvokation = SequenceInvokationList[1];
fieldList.Trim(secondInvokation.StartFieldIndex);
bool fieldsWereSidelined = secondInvokation.StartFieldIndex != RootFieldCount;
SequenceInvokationList.PredictTrim(1);
ResetAllFieldValues();
if (fieldsWereSidelined)
{
// Root sequence was redirected before its end. Some fields will be sidelined and field indexes may not be correct
for (int i = rootSequenceInvokation.FieldsSidelinedFromIndex; i < rootSequenceInvokation.FieldCount; i++)
{
fieldList.Add(rootSequenceInvokation.GetField(i));
}
rootSequenceInvokation.UnsidelineFields();
}
break;
}
}
// remove all sequences after that which contains unRedirecting Field
protected void Unredirect(FtField unredirectingField, out int fieldsAffectedFromIndex)
{
FtSequenceInvokation unredirectingInvokation = unredirectingField.SequenceInvokation;
int unredirectingInvokationIndex = unredirectingInvokation.Index;
if (unredirectingInvokationIndex >= SequenceInvokationList.Count - 1)
{
// unRedirectingInvokationIndex is last. Nothing to do. (should never happen)
fieldsAffectedFromIndex = FtField.NoFieldsAffectedIndex;
}
else
{
int nextInvokationIndex = unredirectingInvokationIndex + 1;
SequenceInvokationList.PredictTrim(nextInvokationIndex);
fieldsAffectedFromIndex = unredirectingInvokation.StartFieldIndex + unredirectingInvokation.FieldsSidelinedFromIndex;
fieldList.Trim(fieldsAffectedFromIndex);
for (int i = unredirectingInvokation.FieldsSidelinedFromIndex; i < unredirectingInvokation.FieldCount; i++)
{
fieldList.Add(unredirectingInvokation.GetField(i));
}
unredirectingInvokation.UnsidelineFields();
}
}