+ refSp = av.getAlignment().getHiddenColumns()
+ .locateVisibleStartOfSequence(refSeq);
+
+ refStartI = refSeq.findIndex(refSeq.getStart()) - 1;
+
+ int seqlength = refSeq.getLength();
+ // get sequence position past the end of the sequence
+ int pastEndPos = refSeq.findPosition(seqlength + 1);
+ refEndI = refSeq.findIndex(pastEndPos - 1) - 1;