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diff --git a/vcl/win/dtrans/clipboardmanager.cxx b/vcl/win/dtrans/clipboardmanager.cxx
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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 .
+ */
+
+#include "clipboardmanager.hxx"
+#include <com/sun/star/container/ElementExistException.hpp>
+#include <com/sun/star/container/NoSuchElementException.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <comphelper/sequence.hxx>
+#include <rtl/ref.hxx>
+
+using namespace com::sun::star::container;
+using namespace com::sun::star::datatransfer;
+using namespace com::sun::star::datatransfer::clipboard;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::uno;
+using namespace cppu;
+using namespace osl;
+
+using ::dtrans::ClipboardManager;
+
+static osl::Mutex g_InstanceGuard;
+static rtl::Reference<ClipboardManager> g_Instance;
+static bool g_Disposed = false;
+
+
+ClipboardManager::ClipboardManager():
+ WeakComponentImplHelper< XClipboardManager, XEventListener, XServiceInfo > (m_aMutex),
+ m_aDefaultName(OUString("default"))
+{
+}
+
+ClipboardManager::~ClipboardManager()
+{
+}
+
+OUString SAL_CALL ClipboardManager::getImplementationName( )
+{
+ return "com.sun.star.comp.datatransfer.ClipboardManager";
+}
+
+sal_Bool SAL_CALL ClipboardManager::supportsService( const OUString& ServiceName )
+{
+ return cppu::supportsService(this, ServiceName);
+}
+
+Sequence< OUString > SAL_CALL ClipboardManager::getSupportedServiceNames( )
+{
+ return { "com.sun.star.datatransfer.clipboard.ClipboardManager" };
+}
+
+Reference< XClipboard > SAL_CALL ClipboardManager::getClipboard( const OUString& aName )
+{
+ MutexGuard aGuard(m_aMutex);
+
+ // object is disposed already
+ if (rBHelper.bDisposed)
+ throw DisposedException("object is disposed.",
+ static_cast < XClipboardManager * > (this));
+
+ ClipboardMap::iterator iter =
+ m_aClipboardMap.find(aName.getLength() ? aName : m_aDefaultName);
+
+ if (iter != m_aClipboardMap.end())
+ return iter->second;
+
+ throw NoSuchElementException(aName, static_cast < XClipboardManager * > (this));
+}
+
+void SAL_CALL ClipboardManager::addClipboard( const Reference< XClipboard >& xClipboard )
+{
+ OSL_ASSERT(xClipboard.is());
+
+ // check parameter
+ if (!xClipboard.is())
+ throw IllegalArgumentException("empty reference",
+ static_cast < XClipboardManager * > (this), 1);
+
+ // the name "default" is reserved for internal use
+ OUString aName = xClipboard->getName();
+ if ( m_aDefaultName == aName )
+ throw IllegalArgumentException("name reserved",
+ static_cast < XClipboardManager * > (this), 1);
+
+ // try to add new clipboard to the list
+ ClearableMutexGuard aGuard(m_aMutex);
+ if (!rBHelper.bDisposed && !rBHelper.bInDispose)
+ {
+ std::pair< const OUString, Reference< XClipboard > > value (
+ aName.getLength() ? aName : m_aDefaultName,
+ xClipboard );
+
+ std::pair< ClipboardMap::iterator, bool > p = m_aClipboardMap.insert(value);
+ aGuard.clear();
+
+ // insert failed, element must exist already
+ if (!p.second)
+ throw ElementExistException(aName, static_cast < XClipboardManager * > (this));
+
+ // request disposing notifications
+ Reference< XComponent > xComponent(xClipboard, UNO_QUERY);
+ if (xComponent.is())
+ xComponent->addEventListener(static_cast < XEventListener * > (this));
+ }
+}
+
+void SAL_CALL ClipboardManager::removeClipboard( const OUString& aName )
+{
+ MutexGuard aGuard(m_aMutex);
+ if (!rBHelper.bDisposed)
+ m_aClipboardMap.erase(aName.getLength() ? aName : m_aDefaultName );
+}
+
+Sequence< OUString > SAL_CALL ClipboardManager::listClipboardNames()
+{
+ MutexGuard aGuard(m_aMutex);
+
+ if (rBHelper.bDisposed)
+ throw DisposedException("object is disposed.",
+ static_cast < XClipboardManager * > (this));
+
+ if (rBHelper.bInDispose)
+ return Sequence< OUString > ();
+
+ return comphelper::mapKeysToSequence(m_aClipboardMap);
+}
+
+void SAL_CALL ClipboardManager::dispose()
+{
+ {
+ osl::MutexGuard aGuard(g_InstanceGuard);
+ g_Instance.clear();
+ g_Disposed = true;
+ }
+ {
+ ClearableMutexGuard aGuard( rBHelper.rMutex );
+ if (!rBHelper.bDisposed && !rBHelper.bInDispose)
+ {
+ rBHelper.bInDispose = true;
+ aGuard.clear();
+
+ // give everyone a chance to save his clipboard instance
+ EventObject aEvt(static_cast < XClipboardManager * > (this));
+ rBHelper.aLC.disposeAndClear( aEvt );
+
+ // removeClipboard is still allowed here, so make a copy of the
+ // list (to ensure integrity) and clear the original.
+ ClearableMutexGuard aGuard2( rBHelper.rMutex );
+ ClipboardMap aCopy(m_aClipboardMap);
+ m_aClipboardMap.clear();
+ aGuard2.clear();
+
+ // dispose all clipboards still in list
+ for (auto const& elem : aCopy)
+ {
+ Reference< XComponent > xComponent(elem.second, UNO_QUERY);
+ if (xComponent.is())
+ {
+ try
+ {
+ xComponent->removeEventListener(static_cast < XEventListener * > (this));
+ xComponent->dispose();
+ }
+ catch (const Exception&)
+ {
+ // exceptions can be safely ignored here.
+ }
+ }
+ }
+
+ rBHelper.bDisposed = true;
+ rBHelper.bInDispose = false;
+ }
+ }
+}
+
+void SAL_CALL ClipboardManager::disposing( const EventObject& event )
+{
+ Reference < XClipboard > xClipboard(event.Source, UNO_QUERY);
+
+ if (xClipboard.is())
+ removeClipboard(xClipboard->getName());
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+dtrans_ClipboardManager_get_implementation(
+ css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+ osl::MutexGuard aGuard(g_InstanceGuard);
+ if (g_Disposed)
+ return nullptr;
+ if (!g_Instance)
+ g_Instance.set(new ClipboardManager());
+ g_Instance->acquire();
+ return static_cast<cppu::OWeakObject*>(g_Instance.get());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */