X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FVisibleColsCollection.java;h=13709a8c217f69d8cec2e86f8ee6cbcceb8b7c0b;hb=e7921fdc9d6ab87ef91bb7781dd7d9316e671e3f;hp=c3d0ab420ea07fcf01b67a80e66a2cd2cb6d0676;hpb=14aeb3c39e60a604bdeed33949ba05e0c8c8be5d;p=jalview.git

diff --git a/src/jalview/datamodel/VisibleColsCollection.java b/src/jalview/datamodel/VisibleColsCollection.java
index c3d0ab4..13709a8 100644
--- a/src/jalview/datamodel/VisibleColsCollection.java
+++ b/src/jalview/datamodel/VisibleColsCollection.java
@@ -22,6 +22,7 @@ package jalview.datamodel;
 
 import jalview.api.AlignmentColsCollectionI;
 
+import java.util.BitSet;
 import java.util.Iterator;
 
 public class VisibleColsCollection implements AlignmentColsCollectionI
@@ -32,11 +33,13 @@ public class VisibleColsCollection implements AlignmentColsCollectionI
 
   HiddenColumns hidden;
 
-  public VisibleColsCollection(int s, int e, AlignmentI al)
+  private BitSet bsVisible;
+
+  public VisibleColsCollection(int s, int e, HiddenColumns h)
   {
     start = s;
     end = e;
-    hidden = al.getHiddenColumns();
+    hidden = h;
   }
 
   @Override
@@ -57,4 +60,27 @@ public class VisibleColsCollection implements AlignmentColsCollectionI
     return false;
   }
 
+  /**
+   * Only the visible columns.
+   */
+  @Override
+  public BitSet getShownBitSet()
+  {
+    if (bsVisible == null)
+    {
+      bsVisible = new BitSet(end + 1);
+    }
+    bsVisible.clear();
+    bsVisible.set(start, end + 1);
+    bsVisible.andNot(hidden.getBitset());
+
+    return bsVisible;
+  }
+
+  @Override
+  public BitSet getHiddenBitSet()
+  {
+    return new BitSet();
+  }
+
 }