--- old/src/macosx/classes/sun/lwawt/macosx/CDragSourceContextPeer.java	2013-02-28 18:59:32.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CDragSourceContextPeer.java	2013-02-28 18:59:32.000000000 +0400
@@ -38,8 +38,12 @@
 import javax.accessibility.*;
 
 import java.util.Map;
+import java.util.concurrent.Callable;
+
 import sun.awt.dnd.*;
 import sun.lwawt.LWComponentPeer;
+import sun.lwawt.LWWindowPeer;
+import sun.lwawt.PlatformWindow;
 
 
 public final class CDragSourceContextPeer extends SunDragSourceContextPeer {
@@ -104,13 +108,15 @@
         }
 
         //It sure will be LWComponentPeer instance as rootComponent is a Window
-        LWComponentPeer peer = (LWComponentPeer)rootComponent.getPeer();
-        //Get a pointer to a native window
-        CPlatformWindow platformWindow = (CPlatformWindow) peer.getPlatformWindow();
-        long nativeWindowPtr = platformWindow.getNSWindowPtr();
-
-        // Get drag cursor:
-        Cursor cursor = this.getCursor();
+        PlatformWindow platformWindow = ((LWComponentPeer)rootComponent.getPeer()).getPlatformWindow();
+        long nativeViewPtr;
+        if (platformWindow instanceof CPlatformWindow) {
+            nativeViewPtr = ((CPlatformWindow) platformWindow).getContentView().getAWTView();
+        } else if (platformWindow instanceof  CViewPlatformEmbeddedFrame) {
+            nativeViewPtr = ((CViewPlatformEmbeddedFrame) platformWindow).getNSViewPtr();
+        } else {
+            throw new InvalidDnDOperationException("Unsupported PlatformWindow implementation");
+        }
 
         // If there isn't any drag image make one of default appearance:
         if (fDragImage == null)
@@ -139,19 +145,15 @@
 
         try {
             // Create native dragging source:
-            final long nativeDragSource = createNativeDragSource(component, peer, nativeWindowPtr, transferable, triggerEvent,
+            final long nativeDragSource = createNativeDragSource(component, nativeViewPtr, transferable, triggerEvent,
                 (int) (dragOrigin.getX()), (int) (dragOrigin.getY()), extModifiers,
-                clickCount, timestamp, cursor, fDragCImage, dragImageOffset.x, dragImageOffset.y,
+                clickCount, timestamp, fDragCImage, dragImageOffset.x, dragImageOffset.y,
                 getDragSourceContext().getSourceActions(), formats, formatMap);
 
             if (nativeDragSource == 0)
                 throw new InvalidDnDOperationException("");
 
             setNativeContext(nativeDragSource);
-
-            CCursorManager.getInstance().startDrag(
-                    (int) (dragOrigin.getX()),
-                    (int) (dragOrigin.getY()));
         }
 
         catch (Exception e) {
@@ -160,6 +162,8 @@
 
         SunDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(transferable);
 
+        CCursorManager.getInstance().setCursor(getCursor());
+
         // Create a new thread to run the dragging operation since it's synchronous, only coming back
         // after dragging is finished. This leaves the AWT event thread free to handle AWT events which
         // are posted during dragging by native event handlers.
@@ -173,8 +177,6 @@
                     } catch (Exception e) {
                         e.printStackTrace();
                     } finally {
-                        CCursorManager.getInstance().stopDrag();
-
                         releaseNativeDragSource(nativeDragSource);
                         fDragImage = null;
                         if (fDragCImage != null) {
@@ -189,8 +191,6 @@
         }
 
         catch (Exception e) {
-            CCursorManager.getInstance().stopDrag();
-
             final long nativeDragSource = getNativeContext();
             setNativeContext(0);
             releaseNativeDragSource(nativeDragSource);
@@ -416,13 +416,24 @@
                                 final int modifiers,
                                 final int x, final int y) {
 
-        CCursorManager.getInstance().updateDragPosition(x, y);
+        try {
+            Component componentAt = LWCToolkit.invokeAndWait(
+                    new Callable<Component>() {
+                        @Override
+                        public Component call() {
+                            LWWindowPeer mouseEventComponent = LWWindowPeer.getWindowUnderCursor();
+                            if (mouseEventComponent == null) {
+                                return null;
+                            }
+                            Component root = SwingUtilities.getRoot(mouseEventComponent.getTarget());
+                            if (root == null) {
+                                return null;
+                            }
+                            Point rootLocation = root.getLocationOnScreen();
+                            return getDropTargetAt(root, x - rootLocation.x, y - rootLocation.y);
+                        }
+                    }, getComponent());
 
-        Component rootComponent = SwingUtilities.getRoot(getComponent());
-        if(rootComponent != null) {
-            Point componentPoint = new Point(x, y);
-            SwingUtilities.convertPointFromScreen(componentPoint, rootComponent);
-            Component componentAt = SwingUtilities.getDeepestComponentAt(rootComponent, componentPoint.x, componentPoint.y);
             if(componentAt != hoveringComponent) {
                 if(hoveringComponent != null) {
                     dragExit(x, y);
@@ -432,20 +443,36 @@
                 }
                 hoveringComponent = componentAt;
             }
+
+            postDragSourceDragEvent(targetActions, modifiers, x, y,
+                    DISPATCH_MOUSE_MOVED);
+        } catch (Exception e) {
+            throw new InvalidDnDOperationException("Failed to handle DragMouseMoved event");
         }
-        postDragSourceDragEvent(targetActions, modifiers, x, y,
-                                DISPATCH_MOUSE_MOVED);
     }
 
-    /**
-     * upcall from native code
-     */
-    private void dragEnter(final int targetActions,
-                           final int modifiers,
-                           final int x, final int y) {
-        CCursorManager.getInstance().updateDragPosition(x, y);
+    //Returns the first lightweight or heavyweight Component which has a dropTarget ready to accept the drag
+    //Should be called from the EventDispatchThread
+    private static Component getDropTargetAt(Component root, int x, int y) {
+        if (!root.contains(x, y) || !root.isEnabled() || !root.isVisible()) {
+            return null;
+        }
+
+        if (root.getDropTarget() != null && root.getDropTarget().isActive()) {
+            return root;
+        }
 
-        postDragSourceDragEvent(targetActions, modifiers, x, y, DISPATCH_ENTER);
+        if (root instanceof Container) {
+            for (Component comp : ((Container) root).getComponents()) {
+                Point loc = comp.getLocation();
+                Component dropTarget = getDropTargetAt(comp, x - loc.x, y - loc.y);
+                if (dropTarget != null) {
+                    return dropTarget;
+                }
+            }
+        }
+
+        return null;
     }
 
     /**
@@ -455,19 +482,15 @@
         hoveringComponent = null;
     }
 
-    public void setCursor(Cursor c) throws InvalidDnDOperationException {
-        // TODO : BG
-        //AWTLockAccess.awtLock();
-        super.setCursor(c);
-        //AWTLockAccess.awtUnlock();
+    @Override
+    protected void setNativeCursor(long nativeCtxt, Cursor c, int cType) {
+        CCursorManager.getInstance().setCursor(c);
     }
 
-    protected native void setNativeCursor(long nativeCtxt, Cursor c, int cType);
-
     // Native support:
-    private native long createNativeDragSource(Component component, ComponentPeer peer, long nativePeer, Transferable transferable,
+    private native long createNativeDragSource(Component component, long nativePeer, Transferable transferable,
         InputEvent triggerEvent, int dragPosX, int dragPosY, int extModifiers, int clickCount, long timestamp,
-        Cursor cursor, CImage nsDragImage, int dragImageOffsetX, int dragImageOffsetY,
+        CImage nsDragImage, int dragImageOffsetX, int dragImageOffsetY,
         int sourceActions, long[] formats, Map formatMap);
 
     private native void doDragging(long nativeDragSource);