shapeattributelayerholder.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
#define INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
 
#include "attributableshape.hxx"
#include "shapeattributelayer.hxx"
 
namespace slideshow::internal
    {
        class ShapeAttributeLayerHolder
        {
        public:
            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 );
            }
 
            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
 
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