1 files changed, 75 insertions, 0 deletions
diff --git a/include/svl/lstner.hxx b/include/svl/lstner.hxx
new file mode 100644
index 000000000..1b0e88063
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+++ b/include/svl/lstner.hxx
@@ -0,0 +1,75 @@
+/* -*- 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_SVL_LSTNER_HXX
+#define INCLUDED_SVL_LSTNER_HXX
+
+#include <svl/svldllapi.h>
+#include <map>
+#include <memory>
+#include <vector>
+#ifdef DBG_UTIL
+#include <sal/backtrace.hxx>
+#endif
+
+class SfxBroadcaster;
+class SfxHint;
+
+//StartListening duplicate handling options
+//Prevent only adds the listener if it's not already added
+//Allow allows duplicate listeners
+//Unexpected, the default, is for the usual case where the
+//listener should only be added once and duplicates are
+//unexpected. In dbgutil mode this tracks where the original
+//listener was added from and reports the duplicate addition
+//as an error
+enum class DuplicateHandling { Unexpected, Prevent, Allow };
+
+class SVL_DLLPUBLIC SfxListener
+{
+    std::vector<SfxBroadcaster*> maBCs;
+#ifdef DBG_UTIL
+    std::map<SfxBroadcaster*, std::unique_ptr<sal::BacktraceState>>
+        maCallStacks;
+#endif
+
+private:
+    const SfxListener&  operator=(const SfxListener &) = delete;
+
+public:
+
+                        SfxListener() {}
+                        SfxListener( const SfxListener &rCopy );
+    virtual             ~SfxListener() COVERITY_NOEXCEPT_FALSE;
+
+    void                StartListening(SfxBroadcaster& rBroadcaster, DuplicateHandling eDuplicateHanding = DuplicateHandling::Unexpected);
+    void                EndListening( SfxBroadcaster& rBroadcaster, bool bRemoveAllDuplicates = false );
+    void                EndListeningAll();
+    bool                IsListening( SfxBroadcaster& rBroadcaster ) const;
+
+    sal_uInt16          GetBroadcasterCount() const;
+    SfxBroadcaster*     GetBroadcasterJOE( sal_uInt16 nNo ) const;
+
+    virtual void        Notify( SfxBroadcaster& rBC, const SfxHint& rHint );
+
+    void                RemoveBroadcaster_Impl( SfxBroadcaster& rBC );
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */