7161109: [macosx] JCK AWT interactive test DnDTextDropTest fails on MacOS

Reviewed-by: serb

src/macosx/classes/sun/lwawt/LWComponentPeer.java

@@ -985,7 +985,13 @@ public abstract class LWComponentPeer<T extends Component, D extends JComponent>
     // DropTargetPeer Method
     @Override
     public void addDropTarget(DropTarget dt) {
-        synchronized (dropTargetLock){
+        LWWindowPeer winPeer = getWindowPeerOrSelf();
+        if (winPeer != null && winPeer != this) {
+            // We need to register the DropTarget in the
+            // peer of the window ancestor of the component
+            winPeer.addDropTarget(dt);
+        } else {
+            synchronized (dropTargetLock) {
                 // 10-14-02 VL: Windows WComponentPeer would add (or remove) the drop target only
                 // if it's the first (or last) one for the component. Otherwise this call is a no-op.
                 if (++fNumDropTargets == 1) {
@@ -998,10 +1004,17 @@ public abstract class LWComponentPeer<T extends Component, D extends JComponent>
                 }
             }
         }
+    }
 
     // DropTargetPeer Method
     @Override
     public void removeDropTarget(DropTarget dt) {
+        LWWindowPeer winPeer = getWindowPeerOrSelf();
+        if (winPeer != null && winPeer != this) {
+            // We need to unregister the DropTarget in the
+            // peer of the window ancestor of the component
+            winPeer.removeDropTarget(dt);
+        } else {
             synchronized (dropTargetLock){
                 // 10-14-02 VL: Windows WComponentPeer would add (or remove) the drop target only
                 // if it's the first (or last) one for the component. Otherwise this call is a no-op.
@@ -1016,6 +1029,7 @@ public abstract class LWComponentPeer<T extends Component, D extends JComponent>
                 }
             }
         }
+    }
 
     // ---- PEER NOTIFICATIONS ---- //
 

src/macosx/native/sun/awt/CDropTarget.m

@@ -648,6 +648,10 @@ extern JNFClassInfo jc_CDropTargetContextPeer;
     if (sDraggingError == FALSE) {
         sDraggingLocation = [sender draggingLocation];
         NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];
+        // The y coordinate that comes in the NSDraggingInfo seems to be reversed - probably
+        // has to do something with the type of view it comes to.
+        // This is the earliest place where we can correct it.
+        javaLocation.y = fView.window.frame.size.height - javaLocation.y;
 
         jint actions = [DnDUtilities mapNSDragOperationMaskToJava:[sender draggingSourceOperationMask]];
         jint dropAction = sJavaDropOperation;