/* -*- 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 "shadwhdl.hxx"

#include <com/sun/star/uno/Any.hxx>

#include <rtl/ustrbuf.hxx>

#include <com/sun/star/table/ShadowFormat.hpp>

#include <o3tl/safeint.hxx>

#include <tools/color.hxx>

#include <sax/tools/converter.hxx>

#include <xmloff/xmluconv.hxx>

#include <xmloff/xmltoken.hxx>

using namespace ::com::sun::star;

using namespace ::xmloff::token;

XMLShadowPropHdl::~XMLShadowPropHdl()

{

    // nothing to do

}

bool XMLShadowPropHdl::importXML( const OUString& rStrImpValue, uno::Any& rValue, const SvXMLUnitConverter& rUnitConverter ) const

{

    bool bRet = false;

    table::ShadowFormat aShadow;

    aShadow.Location = table::ShadowLocation_BOTTOM_RIGHT;

    bool bColorFound = false;

    bool bOffsetFound = false;

    SvXMLTokenEnumerator aTokenEnum( rStrImpValue );

    Color aColor( 128,128, 128 );

    std::u16string_view aToken;

    while( aTokenEnum.getNextToken( aToken ) )

    {

        if( IsXMLToken( aToken, XML_NONE ) )

        {

            aShadow.Location = table::ShadowLocation_NONE;

            bRet = true;

            break;

        }

        else if( !bColorFound && aToken.substr(0,1) == u"#" )

        {

            bRet = ::sax::Converter::convertColor( aColor, aToken );

            if( !bRet )

                return false;

            bColorFound = true;

        }

        else if( !bOffsetFound )

        {

            sal_Int32 nX = 0, nY = 0;

            bRet = rUnitConverter.convertMeasureToCore( nX, aToken );

            if( bRet && aTokenEnum.getNextToken( aToken ) )

                bRet = rUnitConverter.convertMeasureToCore( nY, aToken );

            if( bRet )

            {

                if( nX < 0 )

                {

                    if( nY < 0 )

                        aShadow.Location = table::ShadowLocation_TOP_LEFT;

                    else

                        aShadow.Location = table::ShadowLocation_BOTTOM_LEFT;

                }

                else

                {

                    if( nY < 0 )

                        aShadow.Location = table::ShadowLocation_TOP_RIGHT;

                    else

                        aShadow.Location = table::ShadowLocation_BOTTOM_RIGHT;

                }

                if (nX < 0)

                    nX = o3tl::saturating_toggle_sign(nX);

                if (nY < 0)

                    nY = o3tl::saturating_toggle_sign(nY);

                sal_Int32 nWidth;

                bRet = !o3tl::checked_add(nX, nY, nWidth);

                if (bRet)

                    aShadow.ShadowWidth = sal::static_int_cast<sal_Int16>(nWidth >> 1);

            }

        }

    }

    if( bRet && ( bColorFound || bOffsetFound ) )

    {

        aShadow.IsTransparent = aColor.IsTransparent();

        aShadow.Color = sal_Int32(aColor);

        bRet = true;

    }

    rValue <<= aShadow;

    return bRet;

}

bool XMLShadowPropHdl::exportXML( OUString& rStrExpValue, const uno::Any& rValue, const SvXMLUnitConverter& rUnitConverter ) const

{

    bool bRet = false;

    table::ShadowFormat aShadow;

    if( rValue >>= aShadow )

    {

        sal_Int32 nX = 1, nY = 1;

        switch( aShadow.Location )

        {

            case table::ShadowLocation_TOP_LEFT:

                nX = -1;

                nY = -1;

                break;

            case table::ShadowLocation_TOP_RIGHT:

                nY = -1;

                break;

            case table::ShadowLocation_BOTTOM_LEFT:

                nX = -1;

                break;

            case table::ShadowLocation_BOTTOM_RIGHT:

                break;

            case table::ShadowLocation_NONE:

            default:

                rStrExpValue = GetXMLToken(XML_NONE);

                return true;

        }

        nX *= aShadow.ShadowWidth;

        nY *= aShadow.ShadowWidth;

        OUStringBuffer aOut;

        ::sax::Converter::convertColor( aOut, aShadow.Color );

        aOut.append( ' ' );

        rUnitConverter.convertMeasureToXML( aOut, nX );

        aOut.append( ' ' );

        rUnitConverter.convertMeasureToXML( aOut, nY );

        rStrExpValue = aOut.makeStringAndClear();

        bRet = true;

    }

    return bRet;

}

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