Ticket #687: patch

src/org/openstreetmap/josm/actions/AlignInLineAction.java

@@ -16 +16 @@
 import org.openstreetmap.josm.command.SequenceCommand;
 import org.openstreetmap.josm.data.osm.Node;
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
+import org.openstreetmap.josm.data.osm.Way;
 
 /**
  * Aligns all selected nodes into a straight line (useful for
@@ -44 +45 @@
                                 nodes.add((Node)osm);
                                 itnodes.add((Node)osm);
                         }
+                // special case if no single nodes are selected and exactly one way is: 
+                // then use the way's nodes
+                if ((nodes.size() == 0) && (sel.size() == 1))
+                        for (OsmPrimitive osm : sel)
+                                if (osm instanceof Way) {
+                                        nodes.addAll(((Way)osm).nodes);
+                                        itnodes.addAll(((Way)osm).nodes);
+                                }
                 if (nodes.size() < 3) {
                         JOptionPane.showMessageDialog(Main.parent, tr("Please select at least three nodes."));
                         return;