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diff --git a/vcl/inc/dndlistenercontainer.hxx b/vcl/inc/dndlistenercontainer.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_DNDLCON_HXX
+#define INCLUDED_VCL_INC_DNDLCON_HXX
+
+#include <com/sun/star/datatransfer/dnd/XDragGestureRecognizer.hpp>
+#include <com/sun/star/datatransfer/dnd/XDragSource.hpp>
+#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
+#include <com/sun/star/datatransfer/dnd/XDropTargetDragContext.hpp>
+#include <com/sun/star/datatransfer/dnd/XDropTargetDropContext.hpp>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+
+#include <vcl/unohelp2.hxx>
+
+class GenericDropTargetDropContext :
+    public ::cppu::WeakImplHelper<css::datatransfer::dnd::XDropTargetDropContext>
+{
+public:
+    GenericDropTargetDropContext();
+
+    // XDropTargetDropContext
+    virtual void SAL_CALL acceptDrop( sal_Int8 dragOperation ) override;
+    virtual void SAL_CALL rejectDrop() override;
+    virtual void SAL_CALL dropComplete( sal_Bool success ) override;
+};
+
+class GenericDropTargetDragContext :
+    public ::cppu::WeakImplHelper<css::datatransfer::dnd::XDropTargetDragContext>
+{
+public:
+    GenericDropTargetDragContext();
+
+    // XDropTargetDragContext
+    virtual void SAL_CALL acceptDrag( sal_Int8 dragOperation ) override;
+    virtual void SAL_CALL rejectDrag() override;
+};
+
+class DNDListenerContainer final : public cppu::BaseMutex,
+                                public ::cppu::WeakComponentImplHelper<
+    css::datatransfer::dnd::XDragGestureRecognizer,
+    css::datatransfer::dnd::XDropTargetDragContext,
+    css::datatransfer::dnd::XDropTargetDropContext,
+    css::datatransfer::dnd::XDropTarget >
+{
+    bool m_bActive;
+    sal_Int8 m_nDefaultActions;
+
+    css::uno::Reference< css::datatransfer::dnd::XDropTargetDragContext > m_xDropTargetDragContext;
+    css::uno::Reference< css::datatransfer::dnd::XDropTargetDropContext > m_xDropTargetDropContext;
+
+public:
+
+    DNDListenerContainer( sal_Int8 nDefaultActions );
+    virtual ~DNDListenerContainer() override;
+
+    sal_uInt32 fireDropEvent(
+        const css::uno::Reference< css::datatransfer::dnd::XDropTargetDropContext >& context,
+        sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions,
+        const css::uno::Reference< css::datatransfer::XTransferable >& transferable );
+
+    sal_uInt32 fireDragExitEvent();
+
+    sal_uInt32 fireDragOverEvent(
+        const css::uno::Reference< css::datatransfer::dnd::XDropTargetDragContext >& context,
+        sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions );
+
+    sal_uInt32 fireDragEnterEvent(
+        const css::uno::Reference< css::datatransfer::dnd::XDropTargetDragContext >& context,
+        sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions,
+        const css::uno::Sequence< css::datatransfer::DataFlavor >& dataFlavor );
+
+    sal_uInt32 fireDropActionChangedEvent(
+        const css::uno::Reference< css::datatransfer::dnd::XDropTargetDragContext >& context,
+        sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions );
+
+    sal_uInt32 fireDragGestureEvent(
+        sal_Int8 dragAction, sal_Int32 dragOriginX, sal_Int32 dragOriginY,
+        const css::uno::Reference< css::datatransfer::dnd::XDragSource >& dragSource,
+        const css::uno::Any& triggerEvent );
+
+    /*
+     * XDragGestureRecognizer
+     */
+
+    virtual void SAL_CALL addDragGestureListener( const css::uno::Reference< css::datatransfer::dnd::XDragGestureListener >& dgl ) override;
+    virtual void SAL_CALL removeDragGestureListener( const css::uno::Reference< css::datatransfer::dnd::XDragGestureListener >& dgl ) override;
+    virtual void SAL_CALL resetRecognizer(  ) override;
+
+       /*
+     * XDropTargetDragContext
+     */
+
+    virtual void SAL_CALL acceptDrag( sal_Int8 dragOperation ) override;
+    virtual void SAL_CALL rejectDrag(  ) override;
+
+       /*
+     * XDropTargetDropContext
+     */
+
+    virtual void SAL_CALL acceptDrop( sal_Int8 dropOperation ) override;
+    virtual void SAL_CALL rejectDrop(  ) override;
+    virtual void SAL_CALL dropComplete( sal_Bool success ) override;
+
+    /*
+     * XDropTarget
+     */
+
+    virtual void SAL_CALL addDropTargetListener( const css::uno::Reference< css::datatransfer::dnd::XDropTargetListener >& dtl ) override;
+    virtual void SAL_CALL removeDropTargetListener( const css::uno::Reference< css::datatransfer::dnd::XDropTargetListener >& dtl ) override;
+    virtual sal_Bool SAL_CALL isActive(  ) override;
+    virtual void SAL_CALL setActive( sal_Bool active ) override;
+    virtual sal_Int8 SAL_CALL getDefaultActions(  ) override;
+    virtual void SAL_CALL setDefaultActions( sal_Int8 actions ) override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */