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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 .
+ */
+
+#pragma once
+
+#include <memory>
+#include <tools/SdGlobalResourceContainer.hxx>
+#include <vcl/image.hxx>
+
+namespace sd
+{
+/** This simple class stores frequently used icons so that the classes that
+ use the icons do not have to store them in every one of their
+ instances.
+
+ Icons are addressed over their resource id and are loaded on demand.
+
+ This cache acts like a singleton with a lifetime equal to that of the sd
+ module.
+*/
+class IconCache final : public SdGlobalResource
+{
+public:
+ /** The lifetime of the returned reference is limited to that of the sd
+ module.
+ */
+ static IconCache& Instance();
+
+ /** Return the icon with the given resource id.
+ @return
+ The returned Image may be empty when there is no icon for the
+ given id or an error occurred. Should not happen under normal
+ circumstances.
+ */
+ Image GetIcon(const OUString& rResourceId);
+
+private:
+ class Implementation;
+ ::std::unique_ptr<Implementation> mpImpl;
+
+ /** The constructor creates the one instance of the cache and registers
+ it at the SdGlobalResourceContainer to limit is lifetime to that of
+ the sd module.
+ */
+ IconCache();
+
+ /** This destructor is called by SdGlobalResourceContainer.
+ */
+ virtual ~IconCache() override;
+};
+
+} // end of namespace sd
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */