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diff --git a/forms/source/inc/propertybaghelper.hxx b/forms/source/inc/propertybaghelper.hxx
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+++ b/forms/source/inc/propertybaghelper.hxx
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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 <com/sun/star/beans/PropertyValue.hpp>
+
+#include <comphelper/propertybag.hxx>
+#include <comphelper/propagg.hxx>
+#include <memory>
+
+
+namespace frm
+{
+
+
+    //= class IPropertyBagHelperContext
+
+    class SAL_NO_VTABLE IPropertyBagHelperContext
+    {
+    public:
+        virtual ::osl::Mutex&   getMutex() = 0;
+
+        virtual void            describeFixedAndAggregateProperties(
+            css::uno::Sequence< css::beans::Property >& _out_rFixedProperties,
+            css::uno::Sequence< css::beans::Property >& _out_rAggregateProperties
+        ) const = 0;
+
+        virtual css::uno::Reference< css::beans::XMultiPropertySet >
+                                getPropertiesInterface() = 0;
+
+    protected:
+        ~IPropertyBagHelperContext() {}
+    };
+
+    class PropertyBagHelper
+    {
+    private:
+        IPropertyBagHelperContext&                      m_rContext;
+        std::unique_ptr<::comphelper::OPropertyArrayAggregationHelper>
+                                                        m_pPropertyArrayHelper;
+        ::comphelper::PropertyBag                       m_aDynamicProperties;
+        bool                                            m_bDisposed;
+
+    public:
+        PropertyBagHelper( IPropertyBagHelperContext& _rContext );
+        ~PropertyBagHelper();
+        PropertyBagHelper(const PropertyBagHelper&) = delete;
+        PropertyBagHelper& operator=(const PropertyBagHelper&) = delete;
+
+        // XComponent equivalent
+        void    dispose();
+
+        // OPropertySetHelper equivalent
+        inline ::comphelper::OPropertyArrayAggregationHelper& getInfoHelper() const;
+
+        // XPropertyContainer equivalent
+        void addProperty( const OUString& _rName, ::sal_Int16 _nAttributes, const css::uno::Any& _rInitialValue );
+        void removeProperty( const OUString& _rName );
+
+        // XPropertyAccess equivalent
+        css::uno::Sequence< css::beans::PropertyValue > getPropertyValues();
+        void setPropertyValues( const css::uno::Sequence< css::beans::PropertyValue >& _rProps );
+
+        // forwards to m_aDynamicProperties
+        inline void getDynamicFastPropertyValue( sal_Int32 _nHandle, css::uno::Any& _out_rValue ) const;
+        inline bool convertDynamicFastPropertyValue( sal_Int32 _nHandle, const css::uno::Any& _rNewValue, css::uno::Any& _out_rConvertedValue, css::uno::Any& _out_rCurrentValue ) const;
+        inline void setDynamicFastPropertyValue( sal_Int32 _nHandle, const css::uno::Any& _rValue );
+        inline void getDynamicPropertyDefaultByHandle( sal_Int32 _nHandle, css::uno::Any& _out_rValue ) const;
+        inline bool hasDynamicPropertyByHandle( sal_Int32 _nHandle ) const;
+
+    private:
+        void    impl_nts_checkDisposed_throw() const;
+
+        /** invalidates our property set info, so subsequent calls to impl_ts_getArrayHelper and thus
+            getInfoHelper will return a newly created instance
+        */
+        void    impl_nts_invalidatePropertySetInfo();
+
+        /** returns the IPropertyArrayHelper instance used by |this|
+        */
+        ::comphelper::OPropertyArrayAggregationHelper& impl_ts_getArrayHelper() const;
+
+        /** finds a free property handle
+            @param _rPropertyName
+                the name of the property to find a handle for. If possible, the handle as determined by
+                our ConcreteInfoService instance will be used
+        */
+        sal_Int32   impl_findFreeHandle( const OUString& _rPropertyName );
+    };
+
+
+    inline ::comphelper::OPropertyArrayAggregationHelper& PropertyBagHelper::getInfoHelper() const
+    {
+        return impl_ts_getArrayHelper();
+    }
+
+
+    inline void PropertyBagHelper::getDynamicFastPropertyValue( sal_Int32 _nHandle, css::uno::Any& _out_rValue ) const
+    {
+        m_aDynamicProperties.getFastPropertyValue( _nHandle, _out_rValue );
+    }
+
+
+    inline bool PropertyBagHelper::convertDynamicFastPropertyValue( sal_Int32 _nHandle, const css::uno::Any& _rNewValue, css::uno::Any& _out_rConvertedValue, css::uno::Any& _out_rCurrentValue ) const
+    {
+        return m_aDynamicProperties.convertFastPropertyValue( _nHandle, _rNewValue, _out_rConvertedValue, _out_rCurrentValue );
+    }
+
+
+    inline void PropertyBagHelper::setDynamicFastPropertyValue( sal_Int32 _nHandle, const css::uno::Any& _rValue )
+    {
+        m_aDynamicProperties.setFastPropertyValue( _nHandle, _rValue );
+    }
+
+
+    inline void PropertyBagHelper::getDynamicPropertyDefaultByHandle( sal_Int32 _nHandle, css::uno::Any& _out_rValue ) const
+    {
+        m_aDynamicProperties.getPropertyDefaultByHandle( _nHandle, _out_rValue );
+    }
+
+    inline bool PropertyBagHelper::hasDynamicPropertyByHandle( sal_Int32 _nHandle ) const
+    {
+        return m_aDynamicProperties.hasPropertyByHandle( _nHandle );
+    }
+
+
+} // namespace frm
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */