/* -*- 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/table/XMergeableCell.hpp>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>

#include <comphelper/accessiblewrapper.hxx>
#include <vcl/svapp.hxx>

#include <AccessibleTableShape.hxx>
#include <svx/sdr/table/tablecontroller.hxx>
#include "accessiblecell.hxx"

#include <algorithm>

#include <cppuhelper/implbase.hxx>
#include <svx/svdotable.hxx>
#include <com/sun/star/view/XSelectionSupplier.hpp>


using namespace ::accessibility;
using namespace sdr::table;
using namespace ::com::sun::star::accessibility;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::drawing;
using namespace ::com::sun::star::table;
using namespace ::com::sun::star::container;

namespace accessibility
{

struct hash
{
    std::size_t operator()( const Reference< XCell >& xCell ) const
    {
        return std::size_t( xCell.get() );
    }
};

typedef std::unordered_map< Reference< XCell >, rtl::Reference< AccessibleCell >, hash > AccessibleCellMap;

class AccessibleTableShapeImpl : public cppu::WeakImplHelper< XModifyListener >
{
public:
    explicit AccessibleTableShapeImpl( AccessibleShapeTreeInfo& rShapeTreeInfo );

    void init( const Reference< XAccessible>& xAccessible, const Reference< XTable >& xTable );
    void dispose();

    /// @throws IndexOutOfBoundsException
    /// @throws RuntimeException
    Reference< XAccessible > getAccessibleChild(sal_Int32 i);
    /// @throws IndexOutOfBoundsException
    void getColumnAndRow( sal_Int32 nChildIndex, sal_Int32& rnColumn, sal_Int32& rnRow );

    // XModifyListener
    virtual void SAL_CALL modified( const EventObject& aEvent ) override;

    // XEventListener
    virtual void SAL_CALL disposing( const EventObject& Source ) override;

    AccessibleShapeTreeInfo& mrShapeTreeInfo;
    Reference< XTable > mxTable;
    AccessibleCellMap maChildMap;
    Reference< XAccessible> mxAccessible;
    sal_Int32 mRowCount, mColCount;
    //get the cached AccessibleCell from XCell
    rtl::Reference< AccessibleCell > getAccessibleCell (const Reference< XCell >& xCell);
    /// @throws IndexOutOfBoundsException
    /// @throws RuntimeException
    rtl::Reference< AccessibleCell > getAccessibleCell (sal_Int32 nRow, sal_Int32 nColumn);
};


AccessibleTableShapeImpl::AccessibleTableShapeImpl( AccessibleShapeTreeInfo& rShapeTreeInfo )
: mrShapeTreeInfo( rShapeTreeInfo )
, mRowCount(0)
, mColCount(0)
{
}


void AccessibleTableShapeImpl::init( const Reference< XAccessible>& xAccessible, const Reference< XTable >& xTable )
{
    mxAccessible = xAccessible;
    mxTable = xTable;

    if( mxTable.is() )
    {
        Reference< XModifyListener > xListener( this );
        mxTable->addModifyListener( xListener );
        //register the listener with table model
        Reference< css::view::XSelectionSupplier > xSelSupplier(xTable, UNO_QUERY);
        Reference< css::view::XSelectionChangeListener > xSelListener( xAccessible, UNO_QUERY );
        if (xSelSupplier.is())
            xSelSupplier->addSelectionChangeListener(xSelListener);
        mRowCount = mxTable->getRowCount();
        mColCount = mxTable->getColumnCount();
    }
}


void AccessibleTableShapeImpl::dispose()
{
    if( mxTable.is() )
    {
        //remove all the cell's acc object in table's dispose.
        for( auto& rEntry : maChildMap )
        {
            rEntry.second->dispose();
        }
        maChildMap.clear();
        Reference< XModifyListener > xListener( this );
        mxTable->removeModifyListener( xListener );
        mxTable.clear();
    }
    mxAccessible.clear();
}


//get the cached AccessibleCell from XCell
rtl::Reference< AccessibleCell > AccessibleTableShapeImpl::getAccessibleCell (const Reference< XCell >& xCell)
{
    AccessibleCellMap::iterator iter( maChildMap.find( xCell ) );

    if( iter != maChildMap.end() )
    {
        rtl::Reference< AccessibleCell > xChild( (*iter).second.get() );
        return xChild;
    }
    return rtl::Reference< AccessibleCell >();
}

rtl::Reference< AccessibleCell > AccessibleTableShapeImpl::getAccessibleCell (sal_Int32 nRow, sal_Int32 nColumn)
{
    Reference< XCell > xCell( mxTable->getCellByPosition( nColumn, nRow ) );
    rtl::Reference< AccessibleCell > xChild = getAccessibleCell( xCell );

    if( !xChild.is() && mxTable.is() )
    {
        sal_Int32 nChildIndex = mxTable->getColumnCount() * nRow + nColumn;
        CellRef xCellRef( dynamic_cast< Cell* >( xCell.get() ) );

        rtl::Reference< AccessibleCell > xAccessibleCell( new AccessibleCell( mxAccessible, xCellRef, nChildIndex, mrShapeTreeInfo ) );

        xAccessibleCell->Init();
        maChildMap[xCell] = xAccessibleCell;

        xChild = rtl::Reference< AccessibleCell >( xAccessibleCell.get() );
    }
    return xChild;
}


Reference< XAccessible > AccessibleTableShapeImpl::getAccessibleChild(sal_Int32 nChildIndex)
{
    sal_Int32 nColumn = 0, nRow = 0;
    getColumnAndRow( nChildIndex, nColumn, nRow );

    Reference< XCell > xCell( mxTable->getCellByPosition( nColumn, nRow ) );
    AccessibleCellMap::iterator iter( maChildMap.find( xCell ) );

    if( iter != maChildMap.end() )
    {
        Reference< XAccessible > xChild( (*iter).second.get() );
        return xChild;
    }
    else
    {
        CellRef xCellRef( dynamic_cast< Cell* >( xCell.get() ) );

        rtl::Reference< AccessibleCell > xAccessibleCell( new AccessibleCell( mxAccessible, xCellRef, nChildIndex, mrShapeTreeInfo ) );

        xAccessibleCell->Init();
        maChildMap[xCell] = xAccessibleCell;

        Reference< XAccessible > xChild( xAccessibleCell.get() );
        return xChild;
    }
}


void AccessibleTableShapeImpl::getColumnAndRow( sal_Int32 nChildIndex, sal_Int32& rnColumn, sal_Int32& rnRow )
{
    rnRow = 0;
    rnColumn = nChildIndex;

    if( mxTable.is() )
    {
        const sal_Int32 nColumnCount = mxTable->getColumnCount();
        while( rnColumn >= nColumnCount )
        {
            rnRow++;
            rnColumn -= nColumnCount;
        }

        if( rnRow < mxTable->getRowCount() )
            return;
    }

    throw IndexOutOfBoundsException();
}

// XModifyListener
void SAL_CALL AccessibleTableShapeImpl::modified( const EventObject& /*aEvent*/ )
{
    if( mxTable.is() ) try
    {
        // structural changes may have happened to the table, validate all accessible cell instances
        AccessibleCellMap aTempChildMap;
        aTempChildMap.swap( maChildMap );

        // first move all still existing cells to maChildMap again and update their index

        const sal_Int32 nRowCount = mxTable->getRowCount();
        const sal_Int32 nColCount = mxTable->getColumnCount();

        bool bRowOrColumnChanged = false;
        if (mRowCount != nRowCount || mColCount != nColCount )
        {
            bRowOrColumnChanged = true;
            mRowCount = nRowCount;
            mColCount = nColCount;
        }
        sal_Int32 nChildIndex = 0;

        for( sal_Int32 nRow = 0; nRow < nRowCount; ++nRow )
        {
            for( sal_Int32 nCol = 0; nCol < nColCount; ++nCol )
            {
                Reference< XCell > xCell( mxTable->getCellByPosition( nCol, nRow ) );
                AccessibleCellMap::iterator iter( aTempChildMap.find( xCell ) );

                if( iter != aTempChildMap.end() )
                {
                    rtl::Reference< AccessibleCell > xAccessibleCell( (*iter).second );
                    xAccessibleCell->setIndexInParent( nChildIndex );
                    xAccessibleCell->UpdateChildren();
                    // If row or column count is changed, there is split or merge, so all cell's acc name should be updated
                    if (bRowOrColumnChanged)
                    {
                        xAccessibleCell->SetAccessibleName(xAccessibleCell->getAccessibleName(), AccessibleContextBase::ManuallySet);
                    }
                    // For merged cell, add invisible & disabled state.
                    Reference< XMergeableCell > xMergedCell( mxTable->getCellByPosition( nCol, nRow ),  UNO_QUERY );
                    if (xMergedCell.is() && xMergedCell->isMerged())
                    {
                        xAccessibleCell->ResetState(AccessibleStateType::VISIBLE);
                        xAccessibleCell->ResetState(AccessibleStateType::ENABLED);
                        // IA2 CWS. MT: OFFSCREEN == !SHOWING, should stay consistent
                        // xAccessibleCell->SetState(AccessibleStateType::OFFSCREEN);
                        xAccessibleCell->ResetState(AccessibleStateType::SHOWING);
                    }
                    else
                    {
                        xAccessibleCell->SetState(AccessibleStateType::VISIBLE);
                        xAccessibleCell->SetState(AccessibleStateType::ENABLED);
                        // IA2 CWS. MT: OFFSCREEN == !SHOWING, should stay consistent
                        // xAccessibleCell->ResetState(AccessibleStateType::OFFSCREEN);
                        xAccessibleCell->SetState(AccessibleStateType::SHOWING);
                    }

                    // move still existing cell from temporary child map to our child map
                    maChildMap[xCell] = xAccessibleCell;
                    aTempChildMap.erase( iter );
                }
                else
                {
                    CellRef xCellRef( dynamic_cast< Cell* >( xCell.get() ) );

                    rtl::Reference< AccessibleCell > xAccessibleCell( new AccessibleCell( mxAccessible, xCellRef, nChildIndex, mrShapeTreeInfo ) );

                    xAccessibleCell->Init();
                    maChildMap[xCell] = xAccessibleCell;
                }

                ++nChildIndex;
            }
        }

        // all accessible cell instances still left in aTempChildMap must be disposed
        // as they are no longer part of the table

        for( auto& rEntry : aTempChildMap )
        {
            rEntry.second->dispose();
        }
        //notify bridge to update the acc cache.
        AccessibleTableShape *pAccTable = dynamic_cast <AccessibleTableShape *> (mxAccessible.get());
        if (pAccTable)
            pAccTable->CommitChange(AccessibleEventId::INVALIDATE_ALL_CHILDREN, Any(), Any());
    }
    catch( const Exception& )
    {
        OSL_FAIL("svx::AccessibleTableShape::modified(), exception caught!");
    }
}

// XEventListener
void SAL_CALL AccessibleTableShapeImpl::disposing( const EventObject& /*Source*/ )
{
}

AccessibleTableShape::AccessibleTableShape( const AccessibleShapeInfo& rShapeInfo, const AccessibleShapeTreeInfo& rShapeTreeInfo)
: AccessibleTableShape_Base(rShapeInfo, rShapeTreeInfo)
, mnPreviousSelectionCount(0)
, mxImpl( new AccessibleTableShapeImpl( maShapeTreeInfo ) )
{
}


AccessibleTableShape::~AccessibleTableShape()
{
}


void AccessibleTableShape::Init()
{
    try
    {
        Reference< XPropertySet > xSet( mxShape, UNO_QUERY_THROW );
        Reference< XTable > xTable( xSet->getPropertyValue("Model"), UNO_QUERY_THROW );

        mxImpl->init( this, xTable );
    }
    catch( Exception& )
    {
        OSL_FAIL("AccessibleTableShape::init(), exception caught?");
    }

    AccessibleTableShape_Base::Init();
}


SvxTableController* AccessibleTableShape::getTableController()
{
    SdrView* pView = maShapeTreeInfo.GetSdrView ();
    if( pView )
        return dynamic_cast< SvxTableController* >( pView->getSelectionController().get() );
    else
        return nullptr;
}


// XInterface


Any SAL_CALL AccessibleTableShape::queryInterface( const Type& aType )
{
    if ( aType == cppu::UnoType<XAccessibleTableSelection>::get())
    {
        Reference<XAccessibleTableSelection> xThis( this );
        Any aRet;
        aRet <<= xThis;
        return aRet;
    }
    else
        return AccessibleTableShape_Base::queryInterface( aType );
}


void SAL_CALL AccessibleTableShape::acquire(  ) throw ()
{
    AccessibleTableShape_Base::acquire();
}


void SAL_CALL AccessibleTableShape::release(  ) throw ()
{
    AccessibleTableShape_Base::release();
}


// XAccessible


OUString SAL_CALL AccessibleTableShape::getImplementationName()
{
    return OUString( "com.sun.star.comp.accessibility.AccessibleTableShape" );
}


OUString AccessibleTableShape::CreateAccessibleBaseName()
{
    return OUString("TableShape");
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleChildCount( )
{
    SolarMutexGuard aSolarGuard;
    return mxImpl->mxTable.is() ? mxImpl->mxTable->getRowCount() * mxImpl->mxTable->getColumnCount() : 0;
}


Reference< XAccessible > SAL_CALL AccessibleTableShape::getAccessibleChild( sal_Int32 i )
{
    SolarMutexGuard aSolarGuard;
    ThrowIfDisposed();

    return mxImpl->getAccessibleChild( i );
}


sal_Int16 SAL_CALL AccessibleTableShape::getAccessibleRole()
{
    return AccessibleRole::TABLE;
}


void SAL_CALL AccessibleTableShape::disposing()
{
    mxImpl->dispose();

    // let the base do its stuff
    AccessibleShape::disposing();
}


// XAccessibleTable


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleRowCount()
{
    SolarMutexGuard aSolarGuard;
    return mxImpl->mxTable.is() ? mxImpl->mxTable->getRowCount() : 0;
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleColumnCount(  )
{
    SolarMutexGuard aSolarGuard;
    return mxImpl->mxTable.is() ? mxImpl->mxTable->getColumnCount() : 0;
}


OUString SAL_CALL AccessibleTableShape::getAccessibleRowDescription( sal_Int32 nRow )
{
    checkCellPosition( 0, nRow );
    return OUString();
}


OUString SAL_CALL AccessibleTableShape::getAccessibleColumnDescription( sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, 0 );
    return OUString();
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleRowExtentAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, nRow );
    if( mxImpl->mxTable.is() )
    {
        Reference< XMergeableCell > xCell( mxImpl->mxTable->getCellByPosition( nColumn, nRow ), UNO_QUERY );
        if( xCell.is() )
            return xCell->getRowSpan();
    }
    return 1;
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleColumnExtentAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, nRow );
    if( mxImpl->mxTable.is() )
    {
        Reference< XMergeableCell > xCell( mxImpl->mxTable->getCellByPosition( nColumn, nRow ), UNO_QUERY );
        if( xCell.is() )
            return xCell->getColumnSpan();
    }
    return 1;
}


Reference< XAccessibleTable > SAL_CALL AccessibleTableShape::getAccessibleRowHeaders(  )
{
    Reference< XAccessibleTable > xRet;
    SvxTableController* pController = getTableController();
    if( pController )
    {
        if( pController->isRowHeader() )
        {
            AccessibleTableHeaderShape* pTableHeader = new AccessibleTableHeaderShape( this, true );
            xRet.set( pTableHeader );
        }
    }
    return xRet;
}


Reference< XAccessibleTable > SAL_CALL AccessibleTableShape::getAccessibleColumnHeaders(  )
{
    Reference< XAccessibleTable > xRet;
    SvxTableController* pController = getTableController();
    if( pController )
    {
        if( pController->isColumnHeader() )
        {
            AccessibleTableHeaderShape* pTableHeader = new AccessibleTableHeaderShape( this, false );
            xRet.set( pTableHeader );
        }
    }
    return xRet;
}


Sequence< sal_Int32 > SAL_CALL AccessibleTableShape::getSelectedAccessibleRows(  )
{
    sal_Int32 nRow = getAccessibleRowCount();
    ::std::vector<bool> aSelected( nRow, true );
    sal_Int32 nCount = nRow;
    for( sal_Int32 i = 0; i < nRow; i++ )
    {
        try
        {
            aSelected[i] = isAccessibleRowSelected( i );
        }
        catch( ... )
        {
            return Sequence< sal_Int32 >();
        }

        if( !aSelected[i] )
            nCount--;
    }
    Sequence < sal_Int32 > aRet( nCount );
    sal_Int32 *pRet = aRet.getArray();
    sal_Int32 nPos = 0;
    size_t nSize = aSelected.size();
    for( size_t i=0; i < nSize && nPos < nCount; i++ )
    {
        if( aSelected[i] )
        {
            *pRet++ = i;
            nPos++;
        }
    }

    return aRet;
}


Sequence< sal_Int32 > SAL_CALL AccessibleTableShape::getSelectedAccessibleColumns(  )
{
    sal_Int32 nColumn = getAccessibleColumnCount();
    ::std::vector<bool> aSelected( nColumn, true );
    sal_Int32 nCount = nColumn;
    for( sal_Int32 i = 0; i < nColumn; i++ )
    {
        try
        {
            aSelected[i] = isAccessibleColumnSelected( i );
        }
        catch( ... )
        {
            return Sequence< sal_Int32 >();
        }

        if( !aSelected[i] )
            nCount--;
    }
    Sequence < sal_Int32 > aRet( nCount );
    sal_Int32 *pRet = aRet.getArray();
    sal_Int32 nPos = 0;
    size_t nSize = aSelected.size();
    for( size_t i=0; i < nSize && nPos < nCount; i++ )
    {
        if( aSelected[i] )
        {
            *pRet++ = i;
            nPos++;
        }
    }

    return aRet;
}


sal_Bool SAL_CALL AccessibleTableShape::isAccessibleRowSelected( sal_Int32 nRow )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( 0, nRow );
    SvxTableController* pController = getTableController();
    if( pController )
    {
        return pController->isRowSelected( nRow );
    }
    return false;
}


sal_Bool SAL_CALL AccessibleTableShape::isAccessibleColumnSelected( sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, 0 );
    SvxTableController* pController = getTableController();
    if( pController )
    {
        return pController->isColumnSelected( nColumn );
    }
    return false;
}


Reference< XAccessible > SAL_CALL AccessibleTableShape::getAccessibleCellAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, nRow );

    sal_Int32 nChildIndex = 0;
    if( mxImpl->mxTable.is() )
        nChildIndex = mxImpl->mxTable->getColumnCount() * nRow + nColumn;

    return getAccessibleChild( nChildIndex );
}


Reference< XAccessible > SAL_CALL AccessibleTableShape::getAccessibleCaption(  )
{
    Reference< XAccessible > xRet;
    return xRet;
}


Reference< XAccessible > SAL_CALL AccessibleTableShape::getAccessibleSummary(  )
{
    Reference< XAccessible > xRet;
    return xRet;
}


sal_Bool SAL_CALL AccessibleTableShape::isAccessibleSelected( sal_Int32 nRow, sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, nRow );

    SvxTableController* pController = getTableController();
    if( pController && pController->hasSelectedCells() )
    {
        CellPos aFirstPos, aLastPos;
        pController->getSelectedCells( aFirstPos, aLastPos );
        if( (aFirstPos.mnRow <= nRow) && (aFirstPos.mnCol <= nColumn) && (nRow <= aLastPos.mnRow) && (nColumn <= aLastPos.mnCol) )
            return true;
    }

    return false;
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleIndex( sal_Int32 nRow, sal_Int32 nColumn )
{
    SolarMutexGuard aSolarGuard;
    checkCellPosition( nColumn, nRow );
    return  mxImpl->mxTable.is() ? (nRow * mxImpl->mxTable->getColumnCount() + nColumn) : 0;
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleRow( sal_Int32 nChildIndex )
{
    SolarMutexGuard aSolarGuard;
    sal_Int32 nColumn = 0, nRow = 0;
    mxImpl->getColumnAndRow( nChildIndex, nColumn, nRow );
    return nRow;
}


sal_Int32 SAL_CALL AccessibleTableShape::getAccessibleColumn( sal_Int32 nChildIndex )
{
    SolarMutexGuard aSolarGuard;
    sal_Int32 nColumn = 0, nRow = 0;
    mxImpl->getColumnAndRow( nChildIndex, nColumn, nRow );
    return nColumn;
}


// XAccessibleSelection


void SAL_CALL AccessibleTableShape::selectAccessibleChild( sal_Int32 nChildIndex )
{
    SolarMutexGuard aSolarGuard;
    CellPos aPos;
    mxImpl->getColumnAndRow( nChildIndex, aPos.mnCol, aPos.mnRow );

    // todo, select table shape?!?
    SvxTableController* pController = getTableController();
    if( pController )
    {
        CellPos aFirstPos( aPos ), aLastPos( aPos );
        if( pController->hasSelectedCells() )
        {
            pController->getSelectedCells( aFirstPos, aLastPos );

            aFirstPos.mnRow = std::min( aFirstPos.mnRow, aPos.mnRow );
            aFirstPos.mnCol = std::min( aFirstPos.mnCol, aPos.mnCol );
            aLastPos.mnRow = std::max( aLastPos.mnRow, aPos.mnRow );
            aLastPos.mnCol = std::max( aLastPos.mnCol, aPos.mnCol );
        }
        pController->setSelectedCells( aFirstPos, aLastPos );
    }
}


sal_Bool SAL_CALL AccessibleTableShape::isAccessibleChildSelected( sal_Int32 nChildIndex )
{
    SolarMutexGuard aSolarGuard;
    CellPos aPos;
    mxImpl->getColumnAndRow( nChildIndex, aPos.mnCol, aPos.mnRow );

    return isAccessibleSelected(aPos.mnRow, aPos.mnCol);
}


void SAL_CALL AccessibleTableShape::clearAccessibleSelection()
{
    SolarMutexGuard aSolarGuard;

    SvxTableController* pController = getTableController();
    if( pController )
        pController->clearSelection();
}


void SAL_CALL AccessibleTableShape::selectAllAccessibleChildren()
{
    SolarMutexGuard aSolarGuard;

   // todo: force selection of shape?
    SvxTableController* pController = getTableController();
    if( pController )
        pController->selectAll();
}


sal_Int32 SAL_CALL AccessibleTableShape::getSelectedAccessibleChildCount()
{
    SolarMutexGuard aSolarGuard;

    SvxTableController* pController = getTableController();
    if( pController && pController->hasSelectedCells() )
    {
        CellPos aFirstPos, aLastPos;
        pController->getSelectedCells( aFirstPos, aLastPos );

        const sal_Int32 nSelectedColumns = std::max( sal_Int32(0), aLastPos.mnCol - aFirstPos.mnCol ) + 1;
        const sal_Int32 nSelectedRows = std::max( sal_Int32(0), aLastPos.mnRow - aFirstPos.mnRow ) + 1;
        return nSelectedRows * nSelectedColumns;
    }

    return 0;
}


Reference< XAccessible > SAL_CALL AccessibleTableShape::getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex )
{
    SolarMutexGuard aSolarGuard;

    if( nSelectedChildIndex < 0 )
        throw IndexOutOfBoundsException();

    sal_Int32 nChildIndex = GetIndexOfSelectedChild( nSelectedChildIndex );

    if( nChildIndex < 0 )
        throw IndexOutOfBoundsException();

    if ( nChildIndex >= getAccessibleChildCount() )
    {
        throw IndexOutOfBoundsException();
    }

    return getAccessibleChild( nChildIndex );
}


void SAL_CALL AccessibleTableShape::deselectAccessibleChild( sal_Int32 nChildIndex )
{
    SolarMutexGuard aSolarGuard;
    CellPos aPos;
    mxImpl->getColumnAndRow( nChildIndex, aPos.mnCol, aPos.mnRow );

    // todo, select table shape?!?
    SvxTableController* pController = getTableController();
    if( pController && pController->hasSelectedCells() )
    {
        CellPos aFirstPos, aLastPos;
        pController->getSelectedCells( aFirstPos, aLastPos );

        // create a selection where aPos is not part of anymore
        aFirstPos.mnRow = std::min( aFirstPos.mnRow, aPos.mnRow+1 );
        aFirstPos.mnCol = std::min( aFirstPos.mnCol, aPos.mnCol+1 );
        aLastPos.mnRow = std::max( aLastPos.mnRow, aPos.mnRow-1 );
        aLastPos.mnCol = std::max( aLastPos.mnCol, aPos.mnCol-1 );

        // new selection may be invalid (child to deselect is not at a border of the selection but in between)
        if( (aFirstPos.mnRow > aLastPos.mnRow) || (aFirstPos.mnCol > aLastPos.mnCol) )
            pController->clearSelection(); // if selection is invalid, clear all
        else
            pController->setSelectedCells( aFirstPos, aLastPos );
    }
}

// XAccessibleTableSelection
sal_Bool SAL_CALL AccessibleTableShape::selectRow( sal_Int32 row )
{
    SolarMutexGuard aSolarGuard;
    SvxTableController* pController = getTableController();
    if( !pController )
        return false;
    return pController->selectRow( row );
}

sal_Bool SAL_CALL AccessibleTableShape::selectColumn( sal_Int32 column )
{
    SolarMutexGuard aSolarGuard;
    SvxTableController* pController = getTableController();
    if( !pController )
        return false;
    return pController->selectColumn( column );
}

sal_Bool SAL_CALL AccessibleTableShape::unselectRow( sal_Int32 row )
{
    SolarMutexGuard aSolarGuard;
    SvxTableController* pController = getTableController();
    if( !pController )
        return false;
    return pController->deselectRow( row );
}

sal_Bool SAL_CALL AccessibleTableShape::unselectColumn( sal_Int32 column )
{
    SolarMutexGuard aSolarGuard;
    SvxTableController* pController = getTableController();
    if( !pController )
        return false;
    return pController->deselectColumn( column );
}

sal_Int32 AccessibleTableShape::GetIndexOfSelectedChild(
                sal_Int32 nSelectedChildIndex ) const
{
    sal_Int32 nChildren = const_cast<AccessibleTableShape*>(this)->getAccessibleChildCount();

    if( nSelectedChildIndex >= nChildren )
        return -1;

    sal_Int32 n = 0;
    while( n < nChildren )
    {
        if( const_cast<AccessibleTableShape*>(this)->isAccessibleChildSelected( n ) )
        {
            if( 0 == nSelectedChildIndex )
                break;
            else
                --nSelectedChildIndex;
        }
        ++n;
    }

    return n < nChildren ? n : -1;
}
void AccessibleTableShape::getColumnAndRow( sal_Int32 nChildIndex, sal_Int32& rnColumn, sal_Int32& rnRow )
{
    mxImpl->getColumnAndRow(nChildIndex, rnColumn, rnRow);
}

// XSelectionChangeListener
void SAL_CALL
    AccessibleTableShape::disposing (const EventObject& aEvent)
{
    AccessibleShape::disposing(aEvent);
}
void  SAL_CALL AccessibleTableShape::selectionChanged (const EventObject& rEvent)
{
    //sdr::table::CellRef xCellRef = static_cast< sdr::table::CellRef > (rEvent.Source);
    Reference< XCell > xCell(rEvent.Source, UNO_QUERY);
    if (xCell.is())
    {
        rtl::Reference< AccessibleCell > xAccCell = mxImpl->getAccessibleCell( xCell );
        if (xAccCell.is())
        {
            sal_Int32 nIndex = xAccCell->getAccessibleIndexInParent(),
                nCount = getSelectedAccessibleChildCount();
            bool bSelected = isAccessibleChildSelected(nIndex);
            if (mnPreviousSelectionCount == 0 && nCount > 0 && bSelected)
            {
                xAccCell->SetState(AccessibleStateType::SELECTED);
                xAccCell->CommitChange(AccessibleEventId::SELECTION_CHANGED, Any(), Any());
            }
            else if (bSelected)
            {
                xAccCell->SetState(AccessibleStateType::SELECTED);
                xAccCell->CommitChange(AccessibleEventId::SELECTION_CHANGED_ADD, Any(), Any());
            }
            else
            {
                xAccCell->ResetState(AccessibleStateType::SELECTED);
                xAccCell->CommitChange(AccessibleEventId::SELECTION_CHANGED_REMOVE, Any(), Any());
            }
            mnPreviousSelectionCount = nCount;
        }
    }
}
// Get the currently active cell which is text editing
AccessibleCell* AccessibleTableShape::GetActiveAccessibleCell()
{
    rtl::Reference< AccessibleCell > xAccCell;
    AccessibleCell* pAccCell = nullptr;
    SvxTableController* pController = getTableController();
    if (pController)
    {
        sdr::table::SdrTableObj* pTableObj = pController->GetTableObj();
        if ( pTableObj )
        {
            const sdr::table::CellRef& xCellRef (pTableObj->getActiveCell());
            if ( xCellRef.is() )
            {
                try
                {
                    CellPos rPos;
                    pTableObj->getActiveCellPos( rPos );
                    xAccCell = mxImpl->getAccessibleCell( rPos.mnRow, rPos.mnCol );
                    if ( xAccCell.is() )
                        pAccCell = xAccCell.get();
                }
                catch ( IndexOutOfBoundsException& ) {}
            }
        }
    }
    return pAccCell;
}

//If current active cell is in editing, the focus state should be set to internal text
bool AccessibleTableShape::SetState (sal_Int16 aState)
{
    if( aState == AccessibleStateType::FOCUSED )
    {
        AccessibleCell* pActiveAccessibleCell = GetActiveAccessibleCell();
        if( pActiveAccessibleCell != nullptr )
            return pActiveAccessibleCell->SetState(aState);
    }

    return AccessibleShape::SetState (aState);
}

//If current active cell is in editing, the focus state should be reset to internal text
bool AccessibleTableShape::ResetState (sal_Int16 aState)
{
    if( aState == AccessibleStateType::FOCUSED )
    {
        AccessibleCell* pActiveAccessibleCell = GetActiveAccessibleCell();
        if( pActiveAccessibleCell != nullptr )
            return pActiveAccessibleCell->ResetState(aState);
    }

    return AccessibleShape::ResetState (aState);
}

bool AccessibleTableShape::SetStateDirectly (sal_Int16 aState)
{
    return AccessibleContextBase::SetState (aState);
}

bool AccessibleTableShape::ResetStateDirectly (sal_Int16 aState)
{
    return AccessibleContextBase::ResetState (aState);
}

void AccessibleTableShape::checkCellPosition( sal_Int32 nCol, sal_Int32 nRow )
{
    if( (nCol >= 0) && (nRow >= 0) && mxImpl->mxTable.is() && (nCol < mxImpl->mxTable->getColumnCount()) && (nRow < mxImpl->mxTable->getRowCount()) )
        return;

    throw IndexOutOfBoundsException();
}

AccessibleTableHeaderShape::AccessibleTableHeaderShape( AccessibleTableShape* pTable, bool bRow )
{
    mpTable = pTable;
    mbRow = bRow;
}

AccessibleTableHeaderShape::~AccessibleTableHeaderShape()
{
    mpTable = nullptr;
}

// XAccessible
Reference< XAccessibleContext > SAL_CALL AccessibleTableHeaderShape::getAccessibleContext()
{
    return this;
}

// XAccessibleContext
sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleChildCount( )
{
    return getAccessibleRowCount() * getAccessibleColumnCount();
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleChild( sal_Int32 i )
{
    return mpTable->getAccessibleChild( i );
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleParent()
{
    Reference< XAccessible > XParent;
    return XParent;
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleIndexInParent()
{
    return -1;
}

sal_Int16 SAL_CALL AccessibleTableHeaderShape::getAccessibleRole()
{
    return mpTable->getAccessibleRole();
}

OUString SAL_CALL AccessibleTableHeaderShape::getAccessibleDescription()
{
    return mpTable->getAccessibleDescription();
}

OUString SAL_CALL AccessibleTableHeaderShape::getAccessibleName()
{
    return mpTable->getAccessibleName();
}

Reference< XAccessibleStateSet > SAL_CALL AccessibleTableHeaderShape::getAccessibleStateSet()
{
    return mpTable->getAccessibleStateSet();
}

Reference< XAccessibleRelationSet > SAL_CALL AccessibleTableHeaderShape::getAccessibleRelationSet()
{
    return mpTable->getAccessibleRelationSet();
}

Locale SAL_CALL AccessibleTableHeaderShape::getLocale()
{
    return mpTable->getLocale();
}

//XAccessibleComponent
sal_Bool SAL_CALL AccessibleTableHeaderShape::containsPoint ( const css::awt::Point& aPoint )
{
    return mpTable->containsPoint( aPoint );
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleAtPoint ( const css::awt::Point& aPoint)
{
    return mpTable->getAccessibleAtPoint( aPoint );
}

css::awt::Rectangle SAL_CALL AccessibleTableHeaderShape::getBounds()
{
    return mpTable->getBounds();
}

css::awt::Point SAL_CALL AccessibleTableHeaderShape::getLocation()
{
    return mpTable->getLocation();
}

css::awt::Point SAL_CALL AccessibleTableHeaderShape::getLocationOnScreen()
{
    return mpTable->getLocationOnScreen();
}

css::awt::Size SAL_CALL AccessibleTableHeaderShape::getSize()
{
    return mpTable->getSize();
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getForeground()
{
    return mpTable->getForeground();
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getBackground()
{
    return mpTable->getBackground();
}

void SAL_CALL AccessibleTableHeaderShape::grabFocus()
{
    mpTable->grabFocus();
}
// XAccessibleTable
sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleRowCount()
{
    return mbRow ? 1 : mpTable->getAccessibleRowCount();
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleColumnCount()
{
    return !mbRow ? 1 : mpTable->getAccessibleColumnCount();
}

OUString SAL_CALL AccessibleTableHeaderShape::getAccessibleRowDescription( sal_Int32 nRow )
{
    return mpTable->getAccessibleRowDescription( nRow );
}

OUString SAL_CALL AccessibleTableHeaderShape::getAccessibleColumnDescription( sal_Int32 nColumn )
{
    return mpTable->getAccessibleColumnDescription( nColumn );
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleRowExtentAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    return mpTable->getAccessibleRowExtentAt( nRow, nColumn );
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleColumnExtentAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    return mpTable->getAccessibleColumnExtentAt( nRow, nColumn );
}

Reference< XAccessibleTable > SAL_CALL AccessibleTableHeaderShape::getAccessibleRowHeaders(  )
{
    Reference< XAccessibleTable > xRet;
    return xRet;
}

Reference< XAccessibleTable > SAL_CALL AccessibleTableHeaderShape::getAccessibleColumnHeaders(  )
{
    Reference< XAccessibleTable > xRet;
    return xRet;
}

Sequence< sal_Int32 > SAL_CALL AccessibleTableHeaderShape::getSelectedAccessibleRows(  )
{
    sal_Int32 nRow = getAccessibleRowCount();
    ::std::vector<bool> aSelected( nRow, true );
    sal_Int32 nCount = nRow;
    for( sal_Int32 i = 0; i < nRow; i++ )
    {
        try
        {
            aSelected[i] = isAccessibleRowSelected( i );
        }
        catch( ... )
        {
            return Sequence< sal_Int32 >();
        }

        if( !aSelected[i] )
            nCount--;
    }
    Sequence < sal_Int32 > aRet( nCount );
    sal_Int32 *pRet = aRet.getArray();
    sal_Int32 nPos = 0;
    size_t nSize = aSelected.size();
    for( size_t i=0; i < nSize && nPos < nCount; i++ )
    {
        if( aSelected[i] )
        {
            *pRet++ = i;
            nPos++;
        }
    }

    return aRet;
}

Sequence< sal_Int32 > SAL_CALL AccessibleTableHeaderShape::getSelectedAccessibleColumns(  )
{
    sal_Int32 nColumn = getAccessibleColumnCount();
    ::std::vector<bool> aSelected( nColumn, true );
    sal_Int32 nCount = nColumn;
    for( sal_Int32 i = 0; i < nColumn; i++ )
    {
        try
        {
            aSelected[i] = isAccessibleColumnSelected( i );
        }
        catch( ... )
        {
            return Sequence< sal_Int32 >();
        }

        if( !aSelected[i] )
            nCount--;
    }
    Sequence < sal_Int32 > aRet( nCount );
    sal_Int32 *pRet = aRet.getArray();
    sal_Int32 nPos = 0;
    size_t nSize = aSelected.size();
    for( size_t i=0; i < nSize && nPos < nCount; i++ )
    {
        if( aSelected[i] )
        {
            *pRet++ = i;
            nPos++;
        }
    }

    return aRet;
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::isAccessibleRowSelected( sal_Int32 nRow )
{
    return mpTable->isAccessibleRowSelected( nRow );
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::isAccessibleColumnSelected( sal_Int32 nColumn )
{
    return mpTable->isAccessibleColumnSelected( nColumn );
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleCellAt( sal_Int32 nRow, sal_Int32 nColumn )
{
    return mpTable->getAccessibleCellAt( nRow, nColumn );
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleCaption(  )
{
    return mpTable->getAccessibleCaption();
}

Reference< XAccessible > SAL_CALL AccessibleTableHeaderShape::getAccessibleSummary(  )
{
    return mpTable->getAccessibleSummary();
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::isAccessibleSelected( sal_Int32 nRow, sal_Int32 nColumn )
{
    return mpTable->isAccessibleSelected( nRow, nColumn );
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleIndex( sal_Int32 nRow, sal_Int32 nColumn )
{
    return mpTable->getAccessibleIndex( nRow, nColumn );
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleRow( sal_Int32 nChildIndex )
{
    return mpTable->getAccessibleRow( nChildIndex );
}

sal_Int32 SAL_CALL AccessibleTableHeaderShape::getAccessibleColumn( sal_Int32 nChildIndex )
{
    return mpTable->getAccessibleColumn( nChildIndex );
}

// XAccessibleTableSelection
sal_Bool SAL_CALL AccessibleTableHeaderShape::selectRow( sal_Int32 row )
{
    if( mbRow )
        return mpTable->selectRow( row );
    else
    {
        mpTable->clearAccessibleSelection();
        sal_Int32 nIndex = mpTable->getAccessibleIndex( row, 0 );
        mpTable->selectAccessibleChild( nIndex );
        return true;
    }
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::selectColumn( sal_Int32 column )
{
    if( !mbRow )
        return mpTable->selectColumn( column );
    else
    {
        mpTable->clearAccessibleSelection();
        sal_Int32 nIndex = mpTable->getAccessibleIndex( 0, column );
        mpTable->selectAccessibleChild( nIndex );
        return true;
    }
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::unselectRow( sal_Int32 row )
{
    if( mbRow )
        return mpTable->unselectRow( row );
    else
    {
        sal_Int32 nIndex = mpTable->getAccessibleIndex( row, 0 );
        mpTable->deselectAccessibleChild( nIndex );
        return true;
    }
}

sal_Bool SAL_CALL AccessibleTableHeaderShape::unselectColumn( sal_Int32 column )
{
    if( !mbRow )
        return mpTable->unselectColumn( column );
    else
    {
        sal_Int32 nIndex = mpTable->getAccessibleIndex( 0, column );
        mpTable->deselectAccessibleChild( nIndex );
        return true;
    }
}
}

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