/* -*- 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 "weighhdl.hxx"

#include <sax/tools/converter.hxx>

#include <xmloff/xmltoken.hxx>

#include <rtl/ustring.hxx>

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

#include <com/sun/star/awt/FontWeight.hpp>

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

using namespace ::xmloff::token;

namespace {

struct FontWeightMapper

{

    float fWeight;

    sal_uInt16 nValue;

};

}

// ODF specifies the valid fo:font-weight values, but does not provide mapping

// between weight names to numeric values:

// https://docs.oasis-open.org/office/v1.2/cd05/OpenDocument-v1.2-cd05-part1.html#a_20_184_fo_font-weight

//

// The mapping here is the same as OpenType/windows.h:

// https://learn.microsoft.com/en-us/typography/opentype/spec/os2#usweightclass

FontWeightMapper const aFontWeightMap[] =

{

    { css::awt::FontWeight::DONTKNOW,              0 },

    { css::awt::FontWeight::THIN,                  100 },

    { css::awt::FontWeight::ULTRALIGHT,            200 },

    { css::awt::FontWeight::LIGHT,                 300 },

    { css::awt::FontWeight::SEMILIGHT,             350 },

    { css::awt::FontWeight::NORMAL,                400 },

    { css::awt::FontWeight::MEDIUM,                500 },

    { css::awt::FontWeight::SEMIBOLD,              600 },

    { css::awt::FontWeight::BOLD,                  700 },

    { css::awt::FontWeight::ULTRABOLD,             800 },

    { css::awt::FontWeight::BLACK,                 900 },

    { css::awt::FontWeight::DONTKNOW,             1000 }

};

XMLFontWeightPropHdl::~XMLFontWeightPropHdl()

{

    // Nothing to do

}

bool XMLFontWeightPropHdl::importXML( const OUString& rStrImpValue, Any& rValue, const SvXMLUnitConverter& ) const

{

    bool bRet = false;

    sal_uInt16 nWeight = 0;

    if( IsXMLToken( rStrImpValue, XML_NORMAL ) )

    {

        nWeight = 400;

        bRet = true;

    }

    else if( IsXMLToken( rStrImpValue, XML_BOLD ) )

    {

        nWeight = 700;

        bRet = true;

    }

    else

    {

        sal_Int32 nTemp;

        bRet = ::sax::Converter::convertNumber(nTemp, rStrImpValue, 100, 900);

        if( bRet )

            nWeight = sal::static_int_cast< sal_uInt16 >(nTemp);

    }

    if( bRet )

    {

        bRet = false;

        int const nCount = SAL_N_ELEMENTS(aFontWeightMap);

        for (int i = 0; i < (nCount-1); ++i)

        {

            if( (nWeight >= aFontWeightMap[i].nValue) && (nWeight <= aFontWeightMap[i+1].nValue) )

            {

                sal_uInt16 nDiff1 = nWeight - aFontWeightMap[i].nValue;

                sal_uInt16 nDiff2 = aFontWeightMap[i+1].nValue - nWeight;

                if( nDiff1 < nDiff2 )

                    rValue <<= aFontWeightMap[i].fWeight;

                else

                    rValue <<= aFontWeightMap[i+1].fWeight;

                bRet = true;

                break;

            }

        }

    }

    return bRet;

}

bool XMLFontWeightPropHdl::exportXML( OUString& rStrExpValue, const Any& rValue, const SvXMLUnitConverter& ) const

{

    bool bRet = false;

    float fValue = float();

    if( !( rValue >>= fValue ) )

    {

        sal_Int32 nValue = 0;

        if( rValue >>= nValue )

        {

            fValue = static_cast<float>(nValue);

            bRet = true;

        }

    }

    else

        bRet = true;

    if( bRet )

    {

        sal_uInt16 nWeight = 0;

        for( auto const & pair : aFontWeightMap )

        {

            if( fValue <= pair.fWeight )

            {

                 nWeight = pair.nValue;

                 break;

            }

        }

        if( 400 == nWeight )

            rStrExpValue = GetXMLToken(XML_NORMAL);

        else if( 700 == nWeight )

            rStrExpValue = GetXMLToken(XML_BOLD);

        else

            rStrExpValue = OUString::number( nWeight );

    }

    return bRet;

}

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