### Eclipse Workspace Patch 1.0
#P org.eclipse.jface
Index: src/org/eclipse/jface/viewers/ListViewer.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jface/src/org/eclipse/jface/viewers/ListViewer.java,v
retrieving revision 1.14
diff -u -r1.14 ListViewer.java
--- src/org/eclipse/jface/viewers/ListViewer.java	8 May 2006 20:56:56 -0000	1.14
+++ src/org/eclipse/jface/viewers/ListViewer.java	13 May 2006 18:02:13 -0000
@@ -188,5 +188,19 @@
     protected void listShowSelection() {
         list.showSelection();
     }
-
+    
+    /* (non-Javadoc)
+     * @see org.eclipse.jface.viewers.AbstractListViewer#listGetTopIndex()
+     */
+    protected int listGetTopIndex() {
+    	return list.getTopIndex();
+    }
+    
+    /*
+     * (non-Javadoc)
+     * @see org.eclipse.jface.viewers.AbstractListViewer#listSetTopIndex(int)
+     */
+    protected void listSetTopIndex(int index) {
+    	list.setTopIndex(index);
+    }
 }
Index: src/org/eclipse/jface/viewers/AbstractListViewer.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractListViewer.java,v
retrieving revision 1.13
diff -u -r1.13 AbstractListViewer.java
--- src/org/eclipse/jface/viewers/AbstractListViewer.java	8 May 2006 20:56:57 -0000	1.13
+++ src/org/eclipse/jface/viewers/AbstractListViewer.java	13 May 2006 18:02:13 -0000
@@ -318,7 +318,6 @@
      * Method declared on StructuredViewer.
      */
     protected void internalRefresh(Object element) {
-
         Control list = getControl();
         if (element == null || equals(element, getRoot())) {
             // the parent
@@ -327,7 +326,12 @@
 			}
             unmapAllElements();
             List selection = getSelectionFromWidget();
-
+            
+            int topIndex = -1;
+            if (selection == null || selection.isEmpty()) {
+            	topIndex = listGetTopIndex();
+            }
+            
             list.setRedraw(false);
 			listRemoveAll();
             
@@ -345,13 +349,39 @@
 			
 			listSetItems(items);
             list.setRedraw(true);
-            setSelectionToWidget(selection, false);
+            
+            if (topIndex == -1) {
+            	setSelectionToWidget(selection, false);
+            } else {
+				listSetTopIndex(Math.min(topIndex, children.length));
+            }
         } else {
             doUpdateItem(list, element, true);
         }
     }
+    
+    /**
+     * Returns the index of the item currently at the top of the viewable area.
+     * <p>
+     * Default implementation returns -1.
+     * </p>
+     * @return index, -1 for none
+     */
+    protected int listGetTopIndex(){
+    	return -1;
+    }
 
     /**
+     * Sets the index of the item to be at the top of the viewable area.
+     * <p>
+     * Default implementation does nothing.
+     * </p>
+     * @param index, -1 for none.  index will always refer to a valid index.
+     */
+    protected void listSetTopIndex(int index) {
+    }
+    
+    /**
      * Removes the given elements from this list viewer.
      *
      * @param elements the elements to remove