Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/sd/source/ui/inc/tools/IconCache.hxx b/sd/source/ui/inc/tools/IconCache.hxx
new file mode 100644
index 000000000..fef994764
--- /dev/null
+++ b/sd/source/ui/inc/tools/IconCache.hxx
@@ -0,0 +1,70 @@
+/* -*- 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: */