/* -*- 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 <sal/log.hxx>

#include <tools/stream.hxx>

#include <tools/vcompat.hxx>

#include <vcl/lineinfo.hxx>

#include <basegfx/polygon/b2dpolypolygon.hxx>

#include <basegfx/polygon/b2dpolygontools.hxx>

#include <basegfx/polygon/b2dlinegeometry.hxx>

#include <numeric>

ImplLineInfo::ImplLineInfo()

    : mnWidth(0)

    , mnDashLen(0)

    , mnDotLen(0)

    , mnDistance(0)

    , meLineJoin(basegfx::B2DLineJoin::Round)

    , meLineCap(css::drawing::LineCap_BUTT)

    , meStyle(LineStyle::Solid)

    , mnDashCount(0)

    , mnDotCount(0)

{

}

inline bool ImplLineInfo::operator==( const ImplLineInfo& rB ) const

{

    return(meStyle == rB.meStyle

        && mnWidth == rB.mnWidth

        && mnDashCount == rB.mnDashCount

        && mnDashLen == rB.mnDashLen

        && mnDotCount == rB.mnDotCount

        && mnDotLen == rB.mnDotLen

        && mnDistance == rB.mnDistance

        && meLineJoin == rB.meLineJoin

        && meLineCap == rB.meLineCap);

}

LineInfo::LineInfo( LineStyle eStyle, double nWidth )

{

    mpImplLineInfo->meStyle = eStyle;

    mpImplLineInfo->mnWidth = nWidth;

}

LineInfo::LineInfo( const LineInfo& ) = default;

LineInfo::LineInfo( LineInfo&& ) = default;

LineInfo::~LineInfo() = default;

LineInfo& LineInfo::operator=( const LineInfo& ) = default;

LineInfo& LineInfo::operator=( LineInfo&& ) = default;

bool LineInfo::operator==( const LineInfo& rLineInfo ) const

{

    return mpImplLineInfo == rLineInfo.mpImplLineInfo;

}

void LineInfo::SetStyle( LineStyle eStyle )

{

    mpImplLineInfo->meStyle = eStyle;

}

void LineInfo::SetWidth( double nWidth )

{

    mpImplLineInfo->mnWidth = nWidth;

}

void LineInfo::SetDashCount( sal_uInt16 nDashCount )

{

    mpImplLineInfo->mnDashCount = nDashCount;

}

void LineInfo::SetDashLen( double nDashLen )

{

    mpImplLineInfo->mnDashLen = nDashLen;

}

void LineInfo::SetDotCount( sal_uInt16 nDotCount )

{

    mpImplLineInfo->mnDotCount = nDotCount;

}

void LineInfo::SetDotLen( double nDotLen )

{

    mpImplLineInfo->mnDotLen = nDotLen;

}

void LineInfo::SetDistance( double nDistance )

{

    mpImplLineInfo->mnDistance = nDistance;

}

void LineInfo::SetLineJoin(basegfx::B2DLineJoin eLineJoin)

{

    mpImplLineInfo->meLineJoin = eLineJoin;

}

void LineInfo::SetLineCap(css::drawing::LineCap eLineCap)

{

    mpImplLineInfo->meLineCap = eLineCap;

}

bool LineInfo::IsDefault() const

{

    return( !mpImplLineInfo->mnWidth

        && ( LineStyle::Solid == mpImplLineInfo->meStyle )

        && ( css::drawing::LineCap_BUTT == mpImplLineInfo->meLineCap));

}

static void ReadLimitedDouble(SvStream& rIStm, double &fDest)

{

    double fTmp(0.0);

    rIStm.ReadDouble(fTmp);

    if (!std::isfinite(fTmp) || fTmp < std::numeric_limits<sal_Int32>::min() || fTmp > std::numeric_limits<sal_Int32>::max())

    {

        SAL_WARN("vcl", "Parsing error: out of range double: " << fTmp);

        return;

    }

    fDest = fTmp;

}

SvStream& ReadLineInfo( SvStream& rIStm, LineInfo& rLineInfo )

{

    VersionCompatRead aCompat( rIStm );

    sal_uInt16          nTmp16(0);

    sal_Int32       nTmp32(0);

    rIStm.ReadUInt16( nTmp16 );

    rLineInfo.mpImplLineInfo->meStyle = static_cast<LineStyle>(nTmp16);

    rIStm.ReadInt32( nTmp32 );

    rLineInfo.mpImplLineInfo->mnWidth = nTmp32;

    if( aCompat.GetVersion() >= 2 )

    {

        // version 2

        rIStm.ReadUInt16( rLineInfo.mpImplLineInfo->mnDashCount ).ReadInt32( nTmp32 );

        rLineInfo.mpImplLineInfo->mnDashLen = nTmp32;

        rIStm.ReadUInt16( rLineInfo.mpImplLineInfo->mnDotCount ).ReadInt32( nTmp32 );

        rLineInfo.mpImplLineInfo->mnDotLen = nTmp32;

        rIStm.ReadInt32( nTmp32 );

        rLineInfo.mpImplLineInfo->mnDistance = nTmp32;

    }

    if( aCompat.GetVersion() >= 3 )

    {

        // version 3

        rIStm.ReadUInt16( nTmp16 );

        rLineInfo.mpImplLineInfo->meLineJoin = static_cast<basegfx::B2DLineJoin>(nTmp16);

    }

    if( aCompat.GetVersion() >= 4 )

    {

        // version 4

        rIStm.ReadUInt16( nTmp16 );

        rLineInfo.mpImplLineInfo->meLineCap = static_cast<css::drawing::LineCap>(nTmp16);

    }

    if( aCompat.GetVersion() >= 5 )

    {

        // version 5

        ReadLimitedDouble(rIStm, rLineInfo.mpImplLineInfo->mnWidth);

        ReadLimitedDouble(rIStm, rLineInfo.mpImplLineInfo->mnDashLen);

        ReadLimitedDouble(rIStm, rLineInfo.mpImplLineInfo->mnDotLen);

        ReadLimitedDouble(rIStm, rLineInfo.mpImplLineInfo->mnDistance);

    }

    return rIStm;

}

SvStream& WriteLineInfo( SvStream& rOStm, const LineInfo& rLineInfo )

{

    VersionCompatWrite aCompat( rOStm, 5 );

    // version 1

    rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meStyle) )

         .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnWidth ));

    // since version2

    rOStm.WriteUInt16( rLineInfo.mpImplLineInfo->mnDashCount )

         .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDashLen ));

    rOStm.WriteUInt16( rLineInfo.mpImplLineInfo->mnDotCount )

         .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDotLen ));

    rOStm.WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDistance ));

    // since version3

    rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meLineJoin) );

    // since version4

    rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meLineCap) );

    // since version5

    rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnWidth );

    rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDashLen );

    rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDotLen );

    rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDistance );

    return rOStm;

}

std::vector< double > LineInfo::GetDotDashArray() const

{

    ::std::vector< double > fDotDashArray;

    if ( GetStyle() != LineStyle::Dash )

        return fDotDashArray;

    const double fDashLen(GetDashLen());

    const double fDotLen(GetDotLen());

    const double fDistance(GetDistance());

    for(sal_uInt16 a(0); a < GetDashCount(); a++)

    {

        fDotDashArray.push_back(fDashLen);

        fDotDashArray.push_back(fDistance);

    }

    for(sal_uInt16 b(0); b < GetDotCount(); b++)

    {

        fDotDashArray.push_back(fDotLen);

        fDotDashArray.push_back(fDistance);

    }

    return fDotDashArray;

}

void LineInfo::applyToB2DPolyPolygon(

    basegfx::B2DPolyPolygon& io_rLinePolyPolygon,

    basegfx::B2DPolyPolygon& o_rFillPolyPolygon) const

{

    o_rFillPolyPolygon.clear();

    if(!io_rLinePolyPolygon.count())

        return;

    if(LineStyle::Dash == GetStyle())

    {

        ::std::vector< double > fDotDashArray = GetDotDashArray();

        const double fAccumulated(::std::accumulate(fDotDashArray.begin(), fDotDashArray.end(), 0.0));

        if(fAccumulated > 0.0)

        {

            basegfx::B2DPolyPolygon aResult;

            for(auto const& rPolygon : std::as_const(io_rLinePolyPolygon))

            {

                basegfx::B2DPolyPolygon aLineTarget;

                basegfx::utils::applyLineDashing(

                    rPolygon,

                    fDotDashArray,

                    &aLineTarget);

                aResult.append(aLineTarget);

            }

            io_rLinePolyPolygon = std::move(aResult);

        }

    }

    if(!(GetWidth() > 1 && io_rLinePolyPolygon.count()))

        return;

    const double fHalfLineWidth((GetWidth() * 0.5) + 0.5);

    for(auto const& rPolygon : std::as_const(io_rLinePolyPolygon))

    {

        o_rFillPolyPolygon.append(basegfx::utils::createAreaGeometry(

            rPolygon,

            fHalfLineWidth,

            GetLineJoin(),

            GetLineCap()));

    }

    io_rLinePolyPolygon.clear();

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */