1 files changed, 137 insertions, 0 deletions
diff --git a/comphelper/source/property/propmultiplex2.cxx b/comphelper/source/property/propmultiplex2.cxx
new file mode 100644
index 0000000000..b9d7719c4e
--- /dev/null
+++ b/comphelper/source/property/propmultiplex2.cxx
@@ -0,0 +1,137 @@
+/* -*- 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 <com/sun/star/beans/XPropertySet.hpp>
+#include <comphelper/propmultiplex2.hxx>
+#include <osl/diagnose.h>
+
+namespace comphelper
+{
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::beans;
+
+OPropertyChangeListener2::~OPropertyChangeListener2()
+{
+    if (m_xAdapter.is())
+        m_xAdapter->onListenerDestruction();
+}
+
+void OPropertyChangeListener2::disposeAdapter(std::unique_lock<std::mutex>& rGuard)
+{
+    if (m_xAdapter.is())
+        m_xAdapter->dispose(rGuard);
+
+    // will automatically set a new adapter
+    OSL_ENSURE(!m_xAdapter.is(), "OPropertyChangeListener::disposeAdapter: what did dispose do?");
+}
+
+void OPropertyChangeListener2::setAdapter(std::unique_lock<std::mutex>& /*rGuard*/,
+                                          OPropertyChangeMultiplexer2* pAdapter)
+{
+    m_xAdapter = pAdapter;
+}
+
+OPropertyChangeMultiplexer2::OPropertyChangeMultiplexer2(std::mutex& rMutex,
+                                                         std::unique_lock<std::mutex>& rGuard,
+                                                         OPropertyChangeListener2* _pListener,
+                                                         const Reference<XPropertySet>& _rxSet)
+    : m_rMutex(rMutex)
+    , m_xSet(_rxSet)
+    , m_pListener(_pListener)
+    , m_nLockCount(0)
+    , m_bListening(false)
+{
+    m_pListener->setAdapter(rGuard, this);
+}
+
+OPropertyChangeMultiplexer2::~OPropertyChangeMultiplexer2() {}
+
+void OPropertyChangeMultiplexer2::lock() { ++m_nLockCount; }
+
+void OPropertyChangeMultiplexer2::unlock() { --m_nLockCount; }
+
+void OPropertyChangeMultiplexer2::dispose(std::unique_lock<std::mutex>& rGuard)
+{
+    if (!m_bListening)
+        return;
+
+    Reference<XPropertyChangeListener> xPreventDelete(this);
+
+    for (const OUString& rProp : m_aProperties)
+        m_xSet->removePropertyChangeListener(rProp, static_cast<XPropertyChangeListener*>(this));
+
+    m_pListener->setAdapter(rGuard, nullptr);
+
+    m_pListener = nullptr;
+    m_bListening = false;
+
+    m_xSet = nullptr;
+}
+
+void OPropertyChangeMultiplexer2::onListenerDestruction()
+{
+    if (!m_bListening)
+        return;
+
+    Reference<XPropertyChangeListener> xPreventDelete(this);
+
+    for (const OUString& rProp : m_aProperties)
+        m_xSet->removePropertyChangeListener(rProp, static_cast<XPropertyChangeListener*>(this));
+}
+
+// XEventListener
+
+void SAL_CALL OPropertyChangeMultiplexer2::disposing(const EventObject& /*_rSource*/)
+{
+    std::unique_lock g(m_rMutex);
+    if (m_pListener)
+    {
+        // disconnect the listener
+        if (m_pListener) // may have been reset whilst calling into _disposing
+            m_pListener->setAdapter(g, nullptr);
+    }
+
+    m_pListener = nullptr;
+    m_bListening = false;
+
+    m_xSet = nullptr;
+}
+
+// XPropertyChangeListener
+
+void SAL_CALL OPropertyChangeMultiplexer2::propertyChange(const PropertyChangeEvent& _rEvent)
+{
+    if (m_pListener && !locked())
+        m_pListener->_propertyChanged(_rEvent);
+}
+
+void OPropertyChangeMultiplexer2::addProperty(const OUString& _sPropertyName)
+{
+    if (m_xSet.is())
+    {
+        m_xSet->addPropertyChangeListener(_sPropertyName,
+                                          static_cast<XPropertyChangeListener*>(this));
+        m_aProperties.push_back(_sPropertyName);
+        m_bListening = true;
+    }
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */