Fix drag and drop in java.awt.dnd

java/awt/dnd/DragSource.java

@@ -144,15 +144,11 @@ public void startDrag(DragGestureEvent trigger, Cursor dragCursor,
       {
         flavorMap = map;
 
-        if (peer == null)
-          peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
-
-        if (context == null)
-          context = createDragSourceContext(peer, trigger,
-                                                            dragCursor,
-                                                            dragImage,
-                                                            imageOffset, trans,
-                                                            dsl);
+        // Each drag gets its own peer and context; reusing the first ones
+        // would drag the first Transferable again.
+        peer = Toolkit.getDefaultToolkit().createDragSourceContextPeer(trigger);
+        context = createDragSourceContext(peer, trigger, dragCursor,
+                                          dragImage, imageOffset, trans, dsl);
 
         if (peer == null)
           throw new InvalidDnDOperationException();

java/awt/dnd/DropTargetContext.java

@@ -117,11 +117,18 @@ public void removeNotify()
   protected void setTargetActions(int actions)
   {
     targetActions = actions;
+    if (dtcp != null)
+      dtcp.setTargetActions(actions);
   }
 
   protected int getTargetActions()
   {
-    return targetActions;
+    // As in the JDK, the peer knows the actions; without one, use the
+    // drop target's default actions.
+    if (dtcp != null)
+      return dtcp.getTargetActions();
+    return targetActions != 0 ? targetActions
+                              : dropTarget.getDefaultActions();
   }
 
   /**
@@ -162,7 +169,7 @@ protected void rejectDrop ()
   protected DataFlavor[] getCurrentDataFlavors ()
   {
     if (dtcp != null)
-      dtcp.getTransferDataFlavors();
+      return dtcp.getTransferDataFlavors();
     return null;
   }
 

java/awt/dnd/DropTargetDragEvent.java

@@ -90,7 +90,7 @@ public DropTargetDragEvent (DropTargetContext context, Point location,
                          | DnDConstants.ACTION_LINK
                          | DnDConstants.ACTION_REFERENCE;
 
-    if (~(srcActions ^ srcActionsMask) != 0)
+    if ((srcActions & ~srcActionsMask) != 0)
       throw new IllegalArgumentException ();
 
     this.dropAction = dropAction;

java/awt/dnd/DropTargetDropEvent.java

@@ -104,7 +104,7 @@ public DropTargetDropEvent(DropTargetContext dtc, Point location,
                       | DnDConstants.ACTION_LINK
                       | DnDConstants.ACTION_REFERENCE;
 
-    if (~(actions ^ actionsMask) != 0)
+    if ((actions & ~actionsMask) != 0)
       throw new IllegalArgumentException();
 
     this.dropAction = dropAction;