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diff --git a/toolkit/source/controls/grid/defaultgriddatamodel.cxx b/toolkit/source/controls/grid/defaultgriddatamodel.cxx
new file mode 100644
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+++ b/toolkit/source/controls/grid/defaultgriddatamodel.cxx
@@ -0,0 +1,510 @@
+/* -*- 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 .
+ */
+
+#include <com/sun/star/awt/grid/XMutableGridDataModel.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <comphelper/componentguard.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <o3tl/safeint.hxx>
+
+#include <algorithm>
+#include <vector>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::awt;
+using namespace ::com::sun::star::awt::grid;
+using namespace ::com::sun::star::lang;
+
+namespace {
+
+typedef ::cppu::WeakComponentImplHelper    <   XMutableGridDataModel
+                                            ,   XServiceInfo
+                                            >   DefaultGridDataModel_Base;
+
+class DefaultGridDataModel  :public ::cppu::BaseMutex
+                            ,public DefaultGridDataModel_Base
+{
+public:
+    DefaultGridDataModel();
+    DefaultGridDataModel( DefaultGridDataModel const & i_copySource );
+
+    // XMutableGridDataModel
+    virtual void SAL_CALL addRow( const Any& i_heading, const css::uno::Sequence< css::uno::Any >& Data ) override;
+    virtual void SAL_CALL addRows( const css::uno::Sequence< css::uno::Any>& Headings, const css::uno::Sequence< css::uno::Sequence< css::uno::Any > >& Data ) override;
+    virtual void SAL_CALL insertRow( ::sal_Int32 i_index, const css::uno::Any& i_heading, const css::uno::Sequence< css::uno::Any >& Data ) override;
+    virtual void SAL_CALL insertRows( ::sal_Int32 i_index, const css::uno::Sequence< css::uno::Any>& Headings, const css::uno::Sequence< css::uno::Sequence< css::uno::Any > >& Data ) override;
+    virtual void SAL_CALL removeRow( ::sal_Int32 RowIndex ) override;
+    virtual void SAL_CALL removeAllRows(  ) override;
+    virtual void SAL_CALL updateCellData( ::sal_Int32 ColumnIndex, ::sal_Int32 RowIndex, const css::uno::Any& Value ) override;
+    virtual void SAL_CALL updateRowData( const css::uno::Sequence< ::sal_Int32 >& ColumnIndexes, ::sal_Int32 RowIndex, const css::uno::Sequence< css::uno::Any >& Values ) override;
+    virtual void SAL_CALL updateRowHeading( ::sal_Int32 RowIndex, const css::uno::Any& Heading ) override;
+    virtual void SAL_CALL updateCellToolTip( ::sal_Int32 ColumnIndex, ::sal_Int32 RowIndex, const css::uno::Any& Value ) override;
+    virtual void SAL_CALL updateRowToolTip( ::sal_Int32 RowIndex, const css::uno::Any& Value ) override;
+    virtual void SAL_CALL addGridDataListener( const css::uno::Reference< css::awt::grid::XGridDataListener >& Listener ) override;
+    virtual void SAL_CALL removeGridDataListener( const css::uno::Reference< css::awt::grid::XGridDataListener >& Listener ) override;
+
+    // XGridDataModel
+    virtual ::sal_Int32 SAL_CALL getRowCount() override;
+    virtual ::sal_Int32 SAL_CALL getColumnCount() override;
+    virtual css::uno::Any SAL_CALL getCellData( ::sal_Int32 Column, ::sal_Int32 Row ) override;
+    virtual css::uno::Any SAL_CALL getCellToolTip( ::sal_Int32 Column, ::sal_Int32 Row ) override;
+    virtual css::uno::Any SAL_CALL getRowHeading( ::sal_Int32 RowIndex ) override;
+    virtual css::uno::Sequence< css::uno::Any > SAL_CALL getRowData( ::sal_Int32 RowIndex ) override;
+
+    // OComponentHelper
+    virtual void SAL_CALL disposing() override;
+
+    // XCloneable
+    virtual css::uno::Reference< css::util::XCloneable > SAL_CALL createClone(  ) 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;
+
+private:
+    typedef ::std::pair< Any, Any >     CellData;
+    typedef ::std::vector< CellData >   RowData;
+    typedef ::std::vector< RowData >    GridData;
+
+    void broadcast(
+        GridDataEvent const & i_event,
+        void ( SAL_CALL css::awt::grid::XGridDataListener::*i_listenerMethod )( css::awt::grid::GridDataEvent const & ),
+        ::comphelper::ComponentGuard & i_instanceLock
+    );
+
+    void    impl_insertRow( sal_Int32 const i_position, Any const & i_heading, Sequence< Any > const & i_rowData, sal_Int32 const i_assumedColCount = -1 );
+
+    ::sal_Int32 impl_getRowCount_nolck() const { return sal_Int32( m_aData.size() ); }
+
+    CellData const &    impl_getCellData_throw( sal_Int32 const i_columnIndex, sal_Int32 const i_rowIndex ) const;
+    CellData&           impl_getCellDataAccess_throw( sal_Int32 const i_columnIndex, sal_Int32 const i_rowIndex );
+    RowData&            impl_getRowDataAccess_throw( sal_Int32 const i_rowIndex, size_t const i_requiredColumnCount );
+
+    GridData m_aData;
+    ::std::vector< css::uno::Any > m_aRowHeaders;
+    sal_Int32 m_nColumnCount;
+};
+
+    DefaultGridDataModel::DefaultGridDataModel()
+        :DefaultGridDataModel_Base( m_aMutex )
+        ,m_aRowHeaders()
+        ,m_nColumnCount(0)
+    {
+    }
+
+
+    DefaultGridDataModel::DefaultGridDataModel( DefaultGridDataModel const & i_copySource )
+        :cppu::BaseMutex()
+        ,DefaultGridDataModel_Base( m_aMutex )
+        ,m_aData( i_copySource.m_aData )
+        ,m_aRowHeaders( i_copySource.m_aRowHeaders )
+        ,m_nColumnCount( i_copySource.m_nColumnCount )
+    {
+    }
+
+    void DefaultGridDataModel::broadcast( GridDataEvent const & i_event,
+        void ( SAL_CALL XGridDataListener::*i_listenerMethod )( GridDataEvent const & ), ::comphelper::ComponentGuard & i_instanceLock )
+    {
+        ::cppu::OInterfaceContainerHelper* pListeners = rBHelper.getContainer( cppu::UnoType<XGridDataListener>::get() );
+        if ( !pListeners )
+            return;
+
+        i_instanceLock.clear();
+        pListeners->notifyEach( i_listenerMethod, i_event );
+    }
+
+
+    ::sal_Int32 SAL_CALL DefaultGridDataModel::getRowCount()
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+        return impl_getRowCount_nolck();
+    }
+
+
+    ::sal_Int32 SAL_CALL DefaultGridDataModel::getColumnCount()
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+        return m_nColumnCount;
+    }
+
+
+    DefaultGridDataModel::CellData const & DefaultGridDataModel::impl_getCellData_throw( sal_Int32 const i_column, sal_Int32 const i_row ) const
+    {
+        if  (   ( i_row < 0 ) || ( o3tl::make_unsigned( i_row ) > m_aData.size() )
+            ||  ( i_column < 0 ) || ( i_column > m_nColumnCount )
+            )
+            throw IndexOutOfBoundsException( OUString(), *const_cast< DefaultGridDataModel* >( this ) );
+
+        RowData const & rRow( m_aData[ i_row ] );
+        if ( o3tl::make_unsigned( i_column ) < rRow.size() )
+            return rRow[ i_column ];
+
+        static CellData s_aEmpty;
+        return s_aEmpty;
+    }
+
+
+    DefaultGridDataModel::RowData& DefaultGridDataModel::impl_getRowDataAccess_throw( sal_Int32 const i_rowIndex, size_t const i_requiredColumnCount )
+    {
+        OSL_ENSURE( i_requiredColumnCount <= o3tl::make_unsigned( m_nColumnCount ), "DefaultGridDataModel::impl_getRowDataAccess_throw: invalid column count!" );
+        if  ( ( i_rowIndex < 0 ) || ( o3tl::make_unsigned( i_rowIndex ) >= m_aData.size() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        RowData& rRowData( m_aData[ i_rowIndex ] );
+        if ( rRowData.size() < i_requiredColumnCount )
+            rRowData.resize( i_requiredColumnCount );
+        return rRowData;
+    }
+
+
+    DefaultGridDataModel::CellData& DefaultGridDataModel::impl_getCellDataAccess_throw( sal_Int32 const i_columnIndex, sal_Int32 const i_rowIndex )
+    {
+        if  ( ( i_columnIndex < 0 ) || ( i_columnIndex >= m_nColumnCount ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        RowData& rRowData( impl_getRowDataAccess_throw( i_rowIndex, size_t( i_columnIndex + 1 ) ) );
+        return rRowData[ i_columnIndex ];
+    }
+
+
+    Any SAL_CALL DefaultGridDataModel::getCellData( ::sal_Int32 i_column, ::sal_Int32 i_row )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+        return impl_getCellData_throw( i_column, i_row ).first;
+    }
+
+
+    Any SAL_CALL DefaultGridDataModel::getCellToolTip( ::sal_Int32 i_column, ::sal_Int32 i_row )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+        return impl_getCellData_throw( i_column, i_row ).second;
+    }
+
+
+    Any SAL_CALL DefaultGridDataModel::getRowHeading( ::sal_Int32 i_row )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if ( ( i_row < 0 ) || ( o3tl::make_unsigned( i_row ) >= m_aRowHeaders.size() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        return m_aRowHeaders[ i_row ];
+    }
+
+
+    Sequence< Any > SAL_CALL DefaultGridDataModel::getRowData( ::sal_Int32 i_rowIndex )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        Sequence< Any > resultData( m_nColumnCount );
+        RowData& rRowData = impl_getRowDataAccess_throw( i_rowIndex, m_nColumnCount );
+
+        ::std::transform( rRowData.begin(), rRowData.end(), resultData.getArray(),
+                          [] ( const CellData& rCellData )
+                          { return rCellData.first; });
+        return resultData;
+    }
+
+
+    void DefaultGridDataModel::impl_insertRow( sal_Int32 const i_position, Any const & i_heading, Sequence< Any > const & i_rowData, sal_Int32 const i_assumedColCount )
+    {
+        OSL_PRECOND( ( i_assumedColCount <= 0 ) || ( i_assumedColCount >= i_rowData.getLength() ),
+            "DefaultGridDataModel::impl_insertRow: invalid column count!" );
+
+        // insert heading
+        m_aRowHeaders.insert( m_aRowHeaders.begin() + i_position, i_heading );
+
+        // create new data row
+        RowData newRow( i_assumedColCount > 0 ? i_assumedColCount : i_rowData.getLength() );
+        RowData::iterator cellData = newRow.begin();
+        for ( const Any& rData : i_rowData )
+        {
+            cellData->first = rData;
+            ++cellData;
+        }
+
+        // insert data row
+        m_aData.insert( m_aData.begin() + i_position, newRow );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::addRow( const Any& i_heading, const Sequence< Any >& i_data )
+    {
+        insertRow( getRowCount(), i_heading, i_data );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::addRows( const Sequence< Any >& i_headings, const Sequence< Sequence< Any > >& i_data )
+    {
+        insertRows( getRowCount(), i_headings, i_data );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::insertRow( ::sal_Int32 i_index, const Any& i_heading, const Sequence< Any >& i_data )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if ( ( i_index < 0 ) || ( i_index > impl_getRowCount_nolck() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        // actually insert the row
+        impl_insertRow( i_index, i_heading, i_data );
+
+        // update column count
+        sal_Int32 const columnCount = i_data.getLength();
+        if ( columnCount > m_nColumnCount )
+            m_nColumnCount = columnCount;
+
+        broadcast(
+            GridDataEvent( *this, -1, -1, i_index, i_index ),
+            &XGridDataListener::rowsInserted,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::insertRows( ::sal_Int32 i_index, const Sequence< Any>& i_headings, const Sequence< Sequence< Any > >& i_data )
+    {
+        if ( i_headings.getLength() != i_data.getLength() )
+            throw IllegalArgumentException( OUString(), *this, -1 );
+
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if ( ( i_index < 0 ) || ( i_index > impl_getRowCount_nolck() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        sal_Int32 const rowCount = i_headings.getLength();
+        if ( rowCount == 0 )
+            return;
+
+        // determine max col count in the new data
+        auto pData = std::max_element(i_data.begin(), i_data.end(),
+            [](const Sequence< Any >& a, const Sequence< Any >& b) { return a.getLength() < b.getLength(); });
+        sal_Int32 maxColCount = pData->getLength();
+
+        if ( maxColCount < m_nColumnCount )
+            maxColCount = m_nColumnCount;
+
+        for ( sal_Int32 row=0; row<rowCount;  ++row )
+        {
+            impl_insertRow( i_index + row, i_headings[row], i_data[row], maxColCount );
+        }
+
+        if ( maxColCount > m_nColumnCount )
+            m_nColumnCount = maxColCount;
+
+        broadcast(
+            GridDataEvent( *this, -1, -1, i_index, i_index + rowCount - 1 ),
+            &XGridDataListener::rowsInserted,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::removeRow( ::sal_Int32 i_rowIndex )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if ( ( i_rowIndex < 0 ) || ( o3tl::make_unsigned( i_rowIndex ) >= m_aData.size() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        m_aRowHeaders.erase( m_aRowHeaders.begin() + i_rowIndex );
+        m_aData.erase( m_aData.begin() + i_rowIndex );
+
+        broadcast(
+            GridDataEvent( *this, -1, -1, i_rowIndex, i_rowIndex ),
+            &XGridDataListener::rowsRemoved,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::removeAllRows(  )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        m_aRowHeaders.clear();
+        m_aData.clear();
+
+        broadcast(
+            GridDataEvent( *this, -1, -1, -1, -1 ),
+            &XGridDataListener::rowsRemoved,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::updateCellData( ::sal_Int32 i_columnIndex, ::sal_Int32 i_rowIndex, const Any& i_value )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        impl_getCellDataAccess_throw( i_columnIndex, i_rowIndex ).first = i_value;
+
+        broadcast(
+            GridDataEvent( *this, i_columnIndex, i_columnIndex, i_rowIndex, i_rowIndex ),
+            &XGridDataListener::dataChanged,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::updateRowData( const Sequence< ::sal_Int32 >& i_columnIndexes, ::sal_Int32 i_rowIndex, const Sequence< Any >& i_values )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if  ( ( i_rowIndex < 0 ) || ( o3tl::make_unsigned( i_rowIndex ) >= m_aData.size() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        if ( i_columnIndexes.getLength() != i_values.getLength() )
+            throw IllegalArgumentException( OUString(), *this, 1 );
+
+        sal_Int32 const columnCount = i_columnIndexes.getLength();
+        if ( columnCount == 0 )
+            return;
+
+        for ( sal_Int32 const columnIndex : i_columnIndexes )
+        {
+            if ( ( columnIndex < 0 ) || ( columnIndex > m_nColumnCount ) )
+                throw IndexOutOfBoundsException( OUString(), *this );
+        }
+
+        RowData& rDataRow = m_aData[ i_rowIndex ];
+        for ( sal_Int32 col = 0; col < columnCount; ++col )
+        {
+            sal_Int32 const columnIndex = i_columnIndexes[ col ];
+            if ( o3tl::make_unsigned( columnIndex ) >= rDataRow.size() )
+                rDataRow.resize( columnIndex + 1 );
+
+            rDataRow[ columnIndex ].first = i_values[ col ];
+        }
+
+        auto aPair = ::std::minmax_element( i_columnIndexes.begin(), i_columnIndexes.end() );
+        sal_Int32 const firstAffectedColumn = *aPair.first;
+        sal_Int32 const lastAffectedColumn = *aPair.second;
+        broadcast(
+            GridDataEvent( *this, firstAffectedColumn, lastAffectedColumn, i_rowIndex, i_rowIndex ),
+            &XGridDataListener::dataChanged,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::updateRowHeading( ::sal_Int32 i_rowIndex, const Any& i_heading )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        if  ( ( i_rowIndex < 0 ) || ( o3tl::make_unsigned( i_rowIndex ) >= m_aRowHeaders.size() ) )
+            throw IndexOutOfBoundsException( OUString(), *this );
+
+        m_aRowHeaders[ i_rowIndex ] = i_heading;
+
+        broadcast(
+            GridDataEvent( *this, -1, -1, i_rowIndex, i_rowIndex ),
+            &XGridDataListener::rowHeadingChanged,
+            aGuard
+        );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::updateCellToolTip( ::sal_Int32 i_columnIndex, ::sal_Int32 i_rowIndex, const Any& i_value )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+        impl_getCellDataAccess_throw( i_columnIndex, i_rowIndex ).second = i_value;
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::updateRowToolTip( ::sal_Int32 i_rowIndex, const Any& i_value )
+    {
+        ::comphelper::ComponentGuard aGuard( *this, rBHelper );
+
+        RowData& rRowData = impl_getRowDataAccess_throw( i_rowIndex, m_nColumnCount );
+        for ( auto& rCell : rRowData )
+            rCell.second = i_value;
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::addGridDataListener( const Reference< grid::XGridDataListener >& i_listener )
+    {
+        rBHelper.addListener( cppu::UnoType<XGridDataListener>::get(), i_listener );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::removeGridDataListener( const Reference< grid::XGridDataListener >& i_listener )
+    {
+        rBHelper.removeListener( cppu::UnoType<XGridDataListener>::get(), i_listener );
+    }
+
+
+    void SAL_CALL DefaultGridDataModel::disposing()
+    {
+        css::lang::EventObject aEvent;
+        aEvent.Source.set( *this );
+        rBHelper.aLC.disposeAndClear( aEvent );
+
+        ::osl::MutexGuard aGuard( m_aMutex );
+        GridData aEmptyData;
+        m_aData.swap( aEmptyData );
+
+        ::std::vector< Any > aEmptyRowHeaders;
+        m_aRowHeaders.swap( aEmptyRowHeaders );
+
+        m_nColumnCount = 0;
+    }
+
+
+    OUString SAL_CALL DefaultGridDataModel::getImplementationName(  )
+    {
+        return "stardiv.Toolkit.DefaultGridDataModel";
+    }
+
+    sal_Bool SAL_CALL DefaultGridDataModel::supportsService( const OUString& ServiceName )
+    {
+        return cppu::supportsService(this, ServiceName);
+    }
+
+    Sequence< OUString > SAL_CALL DefaultGridDataModel::getSupportedServiceNames(  )
+    {
+        return { "com.sun.star.awt.grid.DefaultGridDataModel" };
+    }
+
+
+    Reference< css::util::XCloneable > SAL_CALL DefaultGridDataModel::createClone(  )
+    {
+        return new DefaultGridDataModel( *this );
+    }
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+stardiv_Toolkit_DefaultGridDataModel_get_implementation(
+    css::uno::XComponentContext *,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new DefaultGridDataModel());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */