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diff --git a/chart2/source/inc/ReferenceSizeProvider.hxx b/chart2/source/inc/ReferenceSizeProvider.hxx
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+++ b/chart2/source/inc/ReferenceSizeProvider.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_CHART2_SOURCE_INC_REFERENCESIZEPROVIDER_HXX
+#define INCLUDED_CHART2_SOURCE_INC_REFERENCESIZEPROVIDER_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/awt/Size.hpp>
+#include "charttoolsdllapi.hxx"
+
+namespace com::sun::star {
+    namespace chart2 {
+        class XTitle;
+        class XTitled;
+        class XChartDocument;
+    }
+    namespace beans {
+        class XPropertySet;
+    }
+}
+
+namespace chart
+{
+
+class OOO_DLLPUBLIC_CHARTTOOLS ReferenceSizeProvider
+{
+public:
+
+    enum AutoResizeState
+    {
+        AUTO_RESIZE_YES,
+        AUTO_RESIZE_NO,
+        AUTO_RESIZE_AMBIGUOUS,
+        AUTO_RESIZE_UNKNOWN
+    };
+
+    ReferenceSizeProvider(
+        css::awt::Size aPageSize,
+        const css::uno::Reference< css::chart2::XChartDocument > & xChartDoc );
+
+    const css::awt::Size& getPageSize() const { return m_aPageSize;}
+
+    /** Retrieves the state auto-resize from all objects that support this
+        feature.  If all objects return the same state, AUTO_RESIZE_YES or
+        AUTO_RESIZE_NO is returned.
+
+        If no object supporting the feature is found, AUTO_RESIZE_UNKNOWN is
+        returned.  If there are multiple objects, some with state YES and some
+        with state NO, AUTO_RESIZE_AMBIGUOUS is returned.
+    */
+    static AutoResizeState getAutoResizeState(
+        const css::uno::Reference< css::chart2::XChartDocument > & xChartDoc );
+
+    /** sets or resets the auto-resize at all objects that support this feature
+        for text to the opposite of the current setting.  If the current state
+        is ambiguous, it is turned on.  If the current state is unknown it stays
+        unknown.
+    */
+    void toggleAutoResizeState();
+
+    /** Sets the ReferencePageSize according to the internal settings of this
+        class at the XPropertySet, and the adapted font sizes if bAdaptFontSizes
+        is </sal_True>.
+     */
+    SAL_DLLPRIVATE void setValuesAtPropertySet(
+        const css::uno::Reference< css::beans::XPropertySet > & xProp,
+        bool bAdaptFontSizes = true );
+
+    /** Sets the ReferencePageSize according to the internal settings of this
+        class at the XTitle, and the adapted font sizes at the contained
+        XFormattedStrings
+     */
+    SAL_DLLPRIVATE void setValuesAtTitle(
+        const css::uno::Reference< css::chart2::XTitle > & xTitle );
+
+    /** Sets the internal value at all data series in the currently set model.
+        This is useful, if you have changed a chart-type and thus probably added
+        some new data series via model functionality.
+     */
+    void setValuesAtAllDataSeries();
+
+private:
+    SAL_DLLPRIVATE bool useAutoScale() const { return m_bUseAutoScale;}
+
+    /** sets the auto-resize at all objects that support this feature for text.
+        eNewState must be either AUTO_RESIZE_YES or AUTO_RESIZE_NO
+    */
+    SAL_DLLPRIVATE void setAutoResizeState( AutoResizeState eNewState );
+
+    /** Retrieves the auto-resize state from the given propertyset.  The result
+        will be put into eInOutState.  If you initialize eInOutState with
+        AUTO_RESIZE_UNKNOWN, you will get the actual state.  If you pass any
+        other state, the result will be the accumulated state,
+        esp. AUTO_RESIZE_AMBIGUOUS, if the value was NO before, and is YES for
+        the current property set, or the other way round.
+     */
+    SAL_DLLPRIVATE static void getAutoResizeFromPropSet(
+        const css::uno::Reference< css::beans::XPropertySet > & xProp,
+        AutoResizeState & rInOutState );
+
+    SAL_DLLPRIVATE void impl_setValuesAtTitled(
+        const css::uno::Reference< css::chart2::XTitled > & xTitled );
+    SAL_DLLPRIVATE static void impl_getAutoResizeFromTitled(
+        const css::uno::Reference< css::chart2::XTitled > & xTitled,
+        AutoResizeState & rInOutState );
+
+    css::awt::Size m_aPageSize;
+    css::uno::Reference< css::chart2::XChartDocument > m_xChartDoc;
+    bool      m_bUseAutoScale;
+};
+
+} //  namespace chart
+
+// INCLUDED_CHART2_SOURCE_INC_REFERENCESIZEPROVIDER_HXX
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */