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-rw-r--r--comphelper/source/misc/SelectionMultiplex.cxx111
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diff --git a/comphelper/source/misc/SelectionMultiplex.cxx b/comphelper/source/misc/SelectionMultiplex.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 <comphelper/SelectionMultiplex.hxx>
+#include <com/sun/star/view/XSelectionSupplier.hpp>
+
+namespace comphelper
+{
+
+
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::view;
+
+OSelectionChangeListener::~OSelectionChangeListener()
+{
+}
+
+
+void OSelectionChangeListener::_disposing(const EventObject&)
+{
+ // nothing to do here
+}
+
+
+OSelectionChangeMultiplexer::OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const Reference< XSelectionSupplier>& _rxSet)
+ :m_xSet(_rxSet)
+ ,m_pListener(_pListener)
+ ,m_nLockCount(0)
+{
+ osl_atomic_increment(&m_refCount);
+ {
+ Reference< XSelectionChangeListener> xPreventDelete(this);
+ m_xSet->addSelectionChangeListener(xPreventDelete);
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+
+OSelectionChangeMultiplexer::~OSelectionChangeMultiplexer()
+{
+}
+
+
+void OSelectionChangeMultiplexer::lock()
+{
+ ++m_nLockCount;
+}
+
+
+void OSelectionChangeMultiplexer::unlock()
+{
+ --m_nLockCount;
+}
+
+
+// XEventListener
+
+void SAL_CALL OSelectionChangeMultiplexer::disposing( const EventObject& _rSource)
+{
+ if (m_pListener)
+ {
+ // tell the listener
+ if (!locked())
+ m_pListener->_disposing(_rSource);
+ }
+
+ m_pListener = nullptr;
+
+ m_xSet = nullptr;
+}
+
+// XSelectionChangeListener
+
+void SAL_CALL OSelectionChangeMultiplexer::selectionChanged( const EventObject& _rEvent )
+{
+ if (m_pListener && !locked())
+ m_pListener->_selectionChanged(_rEvent);
+}
+
+void OSelectionChangeMultiplexer::dispose()
+{
+ osl_atomic_increment(&m_refCount);
+ {
+ Reference< XSelectionChangeListener> xPreventDelete(this);
+ if(m_xSet.is())
+ m_xSet->removeSelectionChangeListener(xPreventDelete);
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */