+ /**
+ * Finds the hidden region (if any) which starts or ends at res
+ *
+ * @param res
+ * visible residue position, unadjusted for hidden columns
+ * @return region as [start,end] or null if no matching region is found
+ */
+ public int[] getRegionWithEdgeAtRes(int res)
+ {
+ try
+ {
+ LOCK.readLock().lock();
+ int adjres = adjustForHiddenColumns(res);
+
+ int[] reveal = null;
+ if (hiddenColumns != null)
+ {
+ for (int[] region : hiddenColumns)
+ {
+ if (adjres + 1 == region[0] || adjres - 1 == region[1])
+ {
+ reveal = region;
+ break;
+ }
+ }
+ }
+ return reveal;
+ } finally
+ {
+ LOCK.readLock().unlock();
+ }
+ }
+