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diff --git a/extensions/source/propctrlr/formlinkdialog.hxx b/extensions/source/propctrlr/formlinkdialog.hxx
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+++ b/extensions/source/propctrlr/formlinkdialog.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_EXTENSIONS_SOURCE_PROPCTRLR_FORMLINKDIALOG_HXX
+#define INCLUDED_EXTENSIONS_SOURCE_PROPCTRLR_FORMLINKDIALOG_HXX
+
+#include <vcl/weld.hxx>
+
+#include <com/sun/star/sdbc/XConnection.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <memory>
+
+
+namespace pcr
+{
+    class FieldLinkRow;
+
+    //= FormLinkDialog
+
+    class FormLinkDialog : public weld::GenericDialogController
+    {
+    private:
+        css::uno::Reference< css::uno::XComponentContext >
+                                        m_xContext;
+        css::uno::Reference< css::beans::XPropertySet >
+                                        m_xDetailForm;
+        css::uno::Reference< css::beans::XPropertySet >
+                                        m_xMasterForm;
+
+        std::vector< OUString >         m_aRelationDetailColumns;
+        std::vector< OUString >         m_aRelationMasterColumns;
+
+        OUString                 m_sDetailLabel;
+        OUString                 m_sMasterLabel;
+
+        std::unique_ptr<weld::Label> m_xExplanation;
+        std::unique_ptr<weld::Label> m_xDetailLabel;
+        std::unique_ptr<weld::Label> m_xMasterLabel;
+        std::unique_ptr<FieldLinkRow> m_xRow1;
+        std::unique_ptr<FieldLinkRow> m_xRow2;
+        std::unique_ptr<FieldLinkRow> m_xRow3;
+        std::unique_ptr<FieldLinkRow> m_xRow4;
+        std::unique_ptr<weld::Button> m_xOK;
+        std::unique_ptr<weld::Button> m_xSuggest;
+
+    public:
+        FormLinkDialog(
+            weld::Window* _pParent,
+            const css::uno::Reference< css::beans::XPropertySet >& _rxDetailForm,
+            const css::uno::Reference< css::beans::XPropertySet >& _rxMasterForm,
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            const OUString& _sExplanation = OUString(),
+            const OUString& _sDetailLabel = OUString(),
+            const OUString& _sMasterLabel = OUString()
+        );
+
+        virtual ~FormLinkDialog() override;
+
+        // Dialog overridables
+        virtual short run() override;
+
+    private:
+        DECL_LINK( OnSuggest,    weld::Button&, void );
+        DECL_LINK( OnFieldChanged, FieldLinkRow&, void );
+        DECL_LINK( OnInitialize, void*, void);
+
+        void        updateOkButton();
+        void        initializeFieldLists();
+        void        initializeColumnLabels();
+        void        initializeLinks();
+        void        initializeSuggest();
+        void        commitLinkPairs();
+
+        void        initializeFieldRowsFrom(
+                        std::vector< OUString >& _rDetailFields,
+                        std::vector< OUString >& _rMasterFields
+                    );
+
+        static OUString getFormDataSourceType(
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxForm
+                    );
+
+        void        getFormFields(
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxForm,
+                            css::uno::Sequence< OUString >& /* [out] */ _rNames
+                    ) const;
+
+        void        ensureFormConnection(
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxFormProps,
+                            css::uno::Reference< css::sdbc::XConnection >& /* [out] */ _rxConnection
+                    ) const;
+
+        static void getConnectionMetaData(
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxFormProps,
+                            css::uno::Reference< css::sdbc::XDatabaseMetaData >& /* [out] */ _rxMeta
+                    );
+
+        css::uno::Reference< css::beans::XPropertySet >
+                    getCanonicUnderlyingTable( const css::uno::Reference< css::beans::XPropertySet >& _rxFormProps ) const;
+        static bool getExistingRelation(
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxLHS,
+                        const css::uno::Reference< css::beans::XPropertySet >& _rxRHS,
+                        std::vector< OUString >& /* [out] */ _rLeftFields,
+                        std::vector< OUString >& /* [out] */ _rRightFields
+                    );
+    };
+
+}   // namespace pcr
+
+#endif // INCLUDED_EXTENSIONS_SOURCE_PROPCTRLR_FORMLINKDIALOG_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */