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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX
+#define INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX
+
+#include "attributableshape.hxx"
+#include "shapeattributelayer.hxx"
+
+#include <boost/noncopyable.hpp>
+
+namespace slideshow
+{
+ namespace 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 : private boost::noncopyable
+ {
+ 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.
+ }
+
+ 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 mpAttributeLayer;
+ }
+
+ ShapeAttributeLayerSharedPtr get() const
+ {
+ return mpAttributeLayer;
+ }
+
+ private:
+ AttributableShapeSharedPtr mpShape;
+ ShapeAttributeLayerSharedPtr mpAttributeLayer;
+ };
+
+ }
+}
+
+#endif /* INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX */