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diff --git a/xmlhelp/source/cxxhelp/provider/provider.hxx b/xmlhelp/source/cxxhelp/provider/provider.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 .
+ */
+
+#ifndef INCLUDED_XMLHELP_SOURCE_CXXHELP_PROVIDER_PROVIDER_HXX
+#define INCLUDED_XMLHELP_SOURCE_CXXHELP_PROVIDER_PROVIDER_HXX
+
+#include <memory>
+#include <rtl/ustring.hxx>
+#include <ucbhelper/providerhelper.hxx>
+#include <com/sun/star/container/XContainerListener.hpp>
+#include <com/sun/star/container/XContainer.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+
+namespace chelp {
+
+// UNO service name for the provider. This name will be used by the UCB to
+// create instances of the provider.
+
+#define MYUCP_CONTENT_PROVIDER_SERVICE_NAME1   "com.sun.star.help.XMLHelp"
+
+#define MYUCP_CONTENT_PROVIDER_SERVICE_NAME2  "com.sun.star.ucb.HelpContentProvider"
+
+// URL scheme. This is the scheme the provider will be able to create
+// contents for. The UCB will select the provider ( i.e. in order to create
+// contents ) according to this scheme.
+
+#define MYUCP_URL_SCHEME        "vnd.sun.star.help"
+#define MYUCP_CONTENT_TYPE      "application/vnd.sun.star.xmlhelp"    // UCB Content Type.
+
+    class Databases;
+
+    class ContentProvider :
+        public ::ucbhelper::ContentProviderImplHelper,
+        public css::container::XContainerListener,
+        public css::lang::XComponent
+    {
+    public:
+        explicit ContentProvider(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext );
+
+        virtual ~ContentProvider() override;
+
+        // XInterface
+        virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type & rType ) override;
+        virtual void SAL_CALL acquire()
+            throw() override;
+        virtual void SAL_CALL release()
+            throw() override;
+
+        // XTypeProvider
+        virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId() override;
+        virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes() override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        static OUString getImplementationName_Static();
+
+        static css::uno::Sequence< OUString > getSupportedServiceNames_Static();
+
+        static css::uno::Reference< css::lang::XSingleServiceFactory > createServiceFactory(
+                const css::uno::Reference< css::lang::XMultiServiceFactory >& rxServiceMgr );
+
+        // XContentProvider
+        virtual css::uno::Reference< css::ucb::XContent > SAL_CALL queryContent(
+                const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier ) override;
+
+        // Additional interfaces
+
+        // XComponent
+
+        virtual void SAL_CALL
+        dispose(  ) override;
+
+        virtual void SAL_CALL
+        addEventListener( const css::uno::Reference< css::lang::XEventListener >& ) override {}
+
+        virtual void SAL_CALL
+        removeEventListener( const css::uno::Reference< css::lang::XEventListener >& ) override {}
+
+        // XContainerListener ( derive from XEventListener )
+
+        virtual void SAL_CALL
+        disposing( const css::lang::EventObject& /*Source*/ ) override
+        {
+            m_xContainer.clear();
+        }
+
+        virtual void SAL_CALL
+        elementInserted( const css::container::ContainerEvent& ) override {}
+
+        virtual void SAL_CALL
+        elementRemoved( const css::container::ContainerEvent& ) override {}
+
+        virtual void SAL_CALL
+        elementReplaced( const css::container::ContainerEvent& Event ) override;
+
+        // Non-interface methods.
+
+    private:
+        bool                           isInitialized;
+        std::unique_ptr<Databases>     m_pDatabases;
+        css::uno::Reference<css::container::XContainer> m_xContainer;
+
+        // private methods
+
+        void init();
+
+        static void subst( OUString& instpath );
+    };
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */