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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_SLIDESHOW_SOURCE_INC_DISPOSABLE_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_DISPOSABLE_HXX
+
+#include <memory>
+
+
+/* Definition of Disposable interface */
+
+namespace slideshow::internal
+ {
+ /**
+ * Base class for being a shared pointer, since quite a few of the downstream classes
+ * want to be stored using std::shared_ptr.
+ */
+ class SharedPtrAble : public std::enable_shared_from_this<SharedPtrAble>
+ {
+ public:
+ virtual ~SharedPtrAble() {}
+ };
+
+ /** Disposable interface
+
+ With ref-counted objects, deleting object networks
+ containing cycles requires a dispose() call, to enforce
+ every object to call dispose on and release local
+ references.
+ */
+ class Disposable
+ {
+ public:
+ virtual ~Disposable() {}
+
+ /** Dispose all object references.
+
+ An implementor of this method must first call
+ dispose() on any of its external references, and
+ release them after that.
+ */
+ virtual void dispose() = 0;
+ };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_DISPOSABLE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */