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, 102 insertions, 0 deletions

diff --git a/slideshow/source/inc/shapeattributelayerholder.hxx b/slideshow/source/inc/shapeattributelayerholder.hxx
new file mode 100644
index 000000000..4c123b4e5
--- /dev/null
+++ b/slideshow/source/inc/shapeattributelayerholder.hxx
@@ -0,0 +1,102 @@
+/* -*- 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_SHAPEATTRIBUTELAYERHOLDER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
+
+#include "attributableshape.hxx"
+#include "shapeattributelayer.hxx"
+
+namespace slideshow::internal
+    {
+        /** Holds a ShapeAttributeLayer, together with the associated
+            Shape
+
+            Use this class to hold ShapeAttributeLayer objects the
+            RAII way. When this object gets deleted, it will
+            automatically revoke the attribute layer for the given
+            shape (this encapsulates the somewhat clumsy notification
+            process that is required for shape and attribute layer
+            interaction).
+         */
+        class ShapeAttributeLayerHolder
+        {
+        public:
+            /** Create a ShapeAttributeLayerHolder instance.
+
+                This constructor creates an empty attribute holder, to
+                generate an attribute layer, you have to manually call
+                createAttributeLayer().
+             */
+            ShapeAttributeLayerHolder() :
+                mpShape(),
+                mpAttributeLayer()
+            {
+            }
+
+            ~ShapeAttributeLayerHolder()
+            {
+                reset(); // ensures that the last attribute layer is
+                         // correctly deregistered from the shape.
+            }
+
+            ShapeAttributeLayerHolder(const ShapeAttributeLayerHolder&) = delete;
+            ShapeAttributeLayerHolder& operator=(const ShapeAttributeLayerHolder&) = delete;
+
+            void reset()
+            {
+                if( mpShape && mpAttributeLayer )
+                    mpShape->revokeAttributeLayer( mpAttributeLayer );
+            }
+
+            /** This constructor receives a pointer to the Shape, from
+                which attribute layers should be generated. Initially,
+                this object does not create an attribute layer, you
+                have to manually call createAttributeLayer().
+
+                @param rShape
+                Shape for which attribute layers should be generated.
+            */
+            bool createAttributeLayer( const AttributableShapeSharedPtr& rShape )
+            {
+                reset();
+
+                mpShape = rShape;
+
+                if( mpShape )
+                    mpAttributeLayer = mpShape->createAttributeLayer();
+
+                return static_cast< bool >(mpAttributeLayer);
+            }
+
+            const ShapeAttributeLayerSharedPtr& get() const
+            {
+                return mpAttributeLayer;
+            }
+
+        private:
+            AttributableShapeSharedPtr      mpShape;
+            ShapeAttributeLayerSharedPtr    mpAttributeLayer;
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */