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diff --git a/accessibility/source/extended/AccessibleGridControlTableBase.cxx b/accessibility/source/extended/AccessibleGridControlTableBase.cxx
new file mode 100644
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+++ b/accessibility/source/extended/AccessibleGridControlTableBase.cxx
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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 .
+ */
+
+#include <com/sun/star/accessibility/AccessibleRole.hpp>
+#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
+#include <extended/AccessibleGridControlTableBase.hxx>
+#include <vcl/accessibletable.hxx>
+#include <vcl/svapp.hxx>
+#include <comphelper/sequence.hxx>
+
+using css::uno::Reference;
+using css::uno::Sequence;
+using css::uno::Any;
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::accessibility;
+using namespace ::vcl;
+using namespace ::vcl::table;
+
+
+namespace accessibility {
+
+
+AccessibleGridControlTableBase::AccessibleGridControlTableBase(
+        const Reference< XAccessible >& rxParent,
+        IAccessibleTable& rTable,
+        AccessibleTableControlObjType eObjType ) :
+    GridControlAccessibleElement( rxParent, rTable, eObjType )
+{
+}
+
+// XAccessibleContext ---------------------------------------------------------
+
+sal_Int64 SAL_CALL AccessibleGridControlTableBase::getAccessibleChildCount()
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    sal_Int64 nChildren = 0;
+    if (m_eObjType == AccessibleTableControlObjType::ROWHEADERBAR)
+        nChildren = m_aTable.GetRowCount();
+    else if (m_eObjType == AccessibleTableControlObjType::TABLE)
+        nChildren = static_cast<sal_Int64>(m_aTable.GetRowCount()) * static_cast<sal_Int64>(m_aTable.GetColumnCount());
+    else if (m_eObjType == AccessibleTableControlObjType::COLUMNHEADERBAR)
+        nChildren = m_aTable.GetColumnCount();
+    return nChildren;
+}
+
+sal_Int16 SAL_CALL AccessibleGridControlTableBase::getAccessibleRole()
+{
+    SolarMutexGuard g;
+
+    ensureIsAlive();
+    return AccessibleRole::TABLE;
+}
+
+// XAccessibleTable -----------------------------------------------------------
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleRowCount()
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+
+    if (m_eObjType == AccessibleTableControlObjType::COLUMNHEADERBAR)
+        return 1;
+    return  m_aTable.GetRowCount();
+}
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleColumnCount()
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+
+    if (m_eObjType == AccessibleTableControlObjType::ROWHEADERBAR)
+        return 1;
+    return m_aTable.GetColumnCount();
+}
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleRowExtentAt(
+        sal_Int32 nRow, sal_Int32 nColumn )
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    ensureIsValidAddress( nRow, nColumn );
+    return 1;   // merged cells not supported
+}
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleColumnExtentAt(
+        sal_Int32 nRow, sal_Int32 nColumn )
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    ensureIsValidAddress( nRow, nColumn );
+    return 1;   // merged cells not supported
+}
+
+Reference< XAccessible > SAL_CALL AccessibleGridControlTableBase::getAccessibleCaption()
+{
+    SolarMutexGuard g;
+
+    ensureIsAlive();
+    return nullptr;    // not supported
+}
+
+Reference< XAccessible > SAL_CALL AccessibleGridControlTableBase::getAccessibleSummary()
+{
+    SolarMutexGuard g;
+
+    ensureIsAlive();
+    return nullptr;    // not supported
+}
+
+sal_Int64 SAL_CALL AccessibleGridControlTableBase::getAccessibleIndex(
+        sal_Int32 nRow, sal_Int32 nColumn )
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    ensureIsValidAddress( nRow, nColumn );
+    return static_cast<sal_Int64>(nRow) * static_cast<sal_Int64>(m_aTable.GetColumnCount()) + nColumn;
+}
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleRow( sal_Int64 nChildIndex )
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    ensureIsValidIndex( nChildIndex );
+    return implGetRow( nChildIndex );
+}
+
+sal_Int32 SAL_CALL AccessibleGridControlTableBase::getAccessibleColumn( sal_Int64 nChildIndex )
+{
+    SolarMutexGuard aSolarGuard;
+
+    ensureIsAlive();
+    ensureIsValidIndex( nChildIndex );
+    return implGetColumn( nChildIndex );
+}
+
+// XInterface -----------------------------------------------------------------
+
+Any SAL_CALL AccessibleGridControlTableBase::queryInterface( const uno::Type& rType )
+{
+    Any aAny( GridControlAccessibleElement::queryInterface( rType ) );
+    return aAny.hasValue() ?
+        aAny : AccessibleGridControlTableImplHelper::queryInterface( rType );
+}
+
+void SAL_CALL AccessibleGridControlTableBase::acquire() noexcept
+{
+    GridControlAccessibleElement::acquire();
+}
+
+void SAL_CALL AccessibleGridControlTableBase::release() noexcept
+{
+    GridControlAccessibleElement::release();
+}
+
+// XTypeProvider --------------------------------------------------------------
+
+Sequence< uno::Type > SAL_CALL AccessibleGridControlTableBase::getTypes()
+{
+    return ::comphelper::concatSequences(
+        GridControlAccessibleElement::getTypes(),
+        AccessibleGridControlTableImplHelper::getTypes() );
+}
+
+Sequence< sal_Int8 > SAL_CALL AccessibleGridControlTableBase::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+// internal helper methods ----------------------------------------------------
+
+sal_Int32 AccessibleGridControlTableBase::implGetRow( sal_Int64 nChildIndex )
+{
+    sal_Int32 nColumns = getAccessibleColumnCount();
+    return nColumns ? (nChildIndex / nColumns) : 0;
+}
+
+sal_Int32 AccessibleGridControlTableBase::implGetColumn( sal_Int64 nChildIndex )
+{
+    sal_Int32 nColumns = getAccessibleColumnCount();
+    return nColumns ? (nChildIndex % nColumns) : 0;
+}
+
+void AccessibleGridControlTableBase::implGetSelectedRows( Sequence< sal_Int32 >& rSeq )
+{
+    sal_Int32 const selectionCount( m_aTable.GetSelectedRowCount() );
+    rSeq.realloc( selectionCount );
+    auto pSeq = rSeq.getArray();
+    for ( sal_Int32 i=0; i<selectionCount; ++i )
+        pSeq[i] = m_aTable.GetSelectedRowIndex(i);
+}
+
+void AccessibleGridControlTableBase::ensureIsValidRow( sal_Int32 nRow )
+{
+    if (nRow >= getAccessibleRowCount())
+        throw lang::IndexOutOfBoundsException( "row index is invalid", *this );
+}
+
+void AccessibleGridControlTableBase::ensureIsValidColumn( sal_Int32 nColumn )
+{
+    if (nColumn >= getAccessibleColumnCount())
+        throw lang::IndexOutOfBoundsException( "column index is invalid", *this );
+}
+
+void AccessibleGridControlTableBase::ensureIsValidAddress(
+        sal_Int32 nRow, sal_Int32 nColumn )
+{
+    ensureIsValidRow( nRow );
+    ensureIsValidColumn( nColumn );
+}
+
+void AccessibleGridControlTableBase::ensureIsValidIndex( sal_Int64 nChildIndex )
+{
+    if (nChildIndex >= static_cast<sal_Int64>(m_aTable.GetRowCount()) * static_cast<sal_Int64>(m_aTable.GetColumnCount()))
+        throw lang::IndexOutOfBoundsException( "child index is invalid", *this );
+}
+
+
+} // namespace accessibility
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */