/* -*- 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 "FillStyleContext.hxx"

#include <TransGradientStyle.hxx>

#include <com/sun/star/awt/ColorStop.hpp>
#include <com/sun/star/awt/Gradient2.hpp>
#include <com/sun/star/awt/XBitmap.hpp>
#include <com/sun/star/container/XNameContainer.hpp>
#include <com/sun/star/graphic/XGraphic.hpp>
#include <com/sun/star/rendering/RGBColor.hpp>

#include <comphelper/sequence.hxx>
#include <sax/tools/converter.hxx>
#include <xmloff/xmlimp.hxx>
#include <xmloff/xmltoken.hxx>
#include <xmloff/GradientStyle.hxx>
#include <xmloff/HatchStyle.hxx>
#include <xmloff/ImageStyle.hxx>
#include <xmloff/MarkerStyle.hxx>
#include <xmloff/DashStyle.hxx>
#include <xmloff/xmlnamespace.hxx>
#include <xmloff/XMLBase64ImportContext.hxx>

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


XMLGradientStyleContext::XMLGradientStyleContext( SvXMLImport& rImport, sal_Int32 ,
                                              const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLGradientStyleImport aGradientStyle( GetImport() );
    aGradientStyle.importXML( xAttrList, maAny, maStrName );
}

XMLGradientStyleContext::~XMLGradientStyleContext()
{
}

css::uno::Reference<css::xml::sax::XFastContextHandler> XMLGradientStyleContext::createFastChildContext(
        sal_Int32 nElement,
        const css::uno::Reference<css::xml::sax::XFastAttributeList>& xAttrList)
{
    if (nElement == XML_ELEMENT(LO_EXT, xmloff::token::XML_GRADIENT_STOP))
        return new XMLGradientStopContext(GetImport(), nElement, xAttrList, maColorStopVec);

    return nullptr;
}

void XMLGradientStyleContext::endFastElement(sal_Int32 )
{
    // correcting invalid StopOffset values is done at the model. Therefore we import them here
    // without any change.
    if (!maColorStopVec.empty())
    {
        awt::Gradient2 aGradient;
        maAny >>= aGradient;
        aGradient.ColorStops = comphelper::containerToSequence(maColorStopVec);
        maAny <<= aGradient;
    }

    uno::Reference< container::XNameContainer > xGradient( GetImport().GetGradientHelper() );
    try
    {
        if(xGradient.is())
        {
            if( xGradient->hasByName( maStrName ) )
            {
                xGradient->replaceByName( maStrName, maAny );
            }
            else
            {
                xGradient->insertByName( maStrName, maAny );
            }
        }
    }
    catch( container::ElementExistException& )
    {}
}

bool XMLGradientStyleContext::IsTransient() const
{
    return true;
}

XMLHatchStyleContext::XMLHatchStyleContext( SvXMLImport& rImport, sal_Int32 /*nElement*/,
                                            const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLHatchStyleImport aHatchStyle( GetImport() );
    aHatchStyle.importXML( xAttrList, maAny, maStrName );
}

XMLHatchStyleContext::~XMLHatchStyleContext()
{
}

void XMLHatchStyleContext::endFastElement(sal_Int32 )
{
    uno::Reference< container::XNameContainer > xHatch( GetImport().GetHatchHelper() );

    try
    {
        if(xHatch.is())
        {
            if( xHatch->hasByName( maStrName ) )
            {
                xHatch->replaceByName( maStrName, maAny );
            }
            else
            {
                xHatch->insertByName( maStrName, maAny );
            }
        }
    }
    catch( container::ElementExistException& )
    {}
}

bool XMLHatchStyleContext::IsTransient() const
{
    return true;
}


XMLBitmapStyleContext::XMLBitmapStyleContext( SvXMLImport& rImport, sal_Int32 /*nElement*/,
                                              const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLImageStyle::importXML( xAttrList, maAny, maStrName, rImport );
}

XMLBitmapStyleContext::~XMLBitmapStyleContext()
{
}

css::uno::Reference< css::xml::sax::XFastContextHandler > XMLBitmapStyleContext::createFastChildContext(
    sal_Int32 nElement,
    const css::uno::Reference< css::xml::sax::XFastAttributeList >&  )
{
    if( nElement == XML_ELEMENT(OFFICE, xmloff::token::XML_BINARY_DATA) )
    {
        OUString sURL;
        maAny >>= sURL;
        if( sURL.isEmpty() && !mxBase64Stream.is() )
        {
            mxBase64Stream = GetImport().GetStreamForGraphicObjectURLFromBase64();
            if( mxBase64Stream.is() )
                return new XMLBase64ImportContext( GetImport(), mxBase64Stream );
        }
    }

    return nullptr;
}

void XMLBitmapStyleContext::endFastElement(sal_Int32 )
{
    if (!maAny.has<uno::Reference<graphic::XGraphic>>() && mxBase64Stream.is())
    {
        // No graphic so far? Then see if it's inline.
        uno::Reference<graphic::XGraphic> xGraphic = GetImport().loadGraphicFromBase64(mxBase64Stream);
        if (xGraphic.is())
        {
            maAny <<= xGraphic;
        }
    }

    if (!maAny.has<uno::Reference<graphic::XGraphic>>())
        return;

    uno::Reference<container::XNameContainer> xBitmapContainer(GetImport().GetBitmapHelper());

    uno::Reference<graphic::XGraphic> xGraphic = maAny.get<uno::Reference<graphic::XGraphic>>();
    uno::Reference<awt::XBitmap> xBitmap(xGraphic, uno::UNO_QUERY);

    try
    {
        if (xBitmapContainer.is())
        {
            if (xBitmapContainer->hasByName(maStrName))
            {
                xBitmapContainer->replaceByName(maStrName, uno::Any(xBitmap));
            }
            else
            {
                xBitmapContainer->insertByName(maStrName, uno::Any(xBitmap));
            }
        }
    }
    catch (container::ElementExistException&)
    {}
}

bool XMLBitmapStyleContext::IsTransient() const
{
    return true;
}


XMLTransGradientStyleContext::XMLTransGradientStyleContext( SvXMLImport& rImport, sal_Int32 /*nElement*/,
                                              const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLTransGradientStyleImport aTransGradientStyle( GetImport() );
    aTransGradientStyle.importXML( xAttrList, maAny, maStrName );
}

XMLTransGradientStyleContext::~XMLTransGradientStyleContext()
{
}

css::uno::Reference<css::xml::sax::XFastContextHandler> XMLTransGradientStyleContext::createFastChildContext(
        sal_Int32 nElement,
        const css::uno::Reference<css::xml::sax::XFastAttributeList>& xAttrList)
{
    if (nElement == XML_ELEMENT(LO_EXT, xmloff::token::XML_OPACITY_STOP))
        return new XMLTransparencyStopContext(GetImport(), nElement, xAttrList, maColorStopVec);

    return nullptr;
}

void XMLTransGradientStyleContext::endFastElement(sal_Int32 )
{
    uno::Reference< container::XNameContainer > xTransGradient( GetImport().GetTransGradientHelper() );

    // correcting invalid StopOffset values is done at the model. Therefore we import them here
    // without any change.
    if (!maColorStopVec.empty())
    {
        awt::Gradient2 aGradient;
        maAny >>= aGradient;
        aGradient.ColorStops = comphelper::containerToSequence(maColorStopVec);
        maAny <<= aGradient;
    }

    try
    {
        if(xTransGradient.is())
        {
            if( xTransGradient->hasByName( maStrName ) )
            {
                xTransGradient->replaceByName( maStrName, maAny );
            }
            else
            {
                xTransGradient->insertByName( maStrName, maAny );
            }
        }
    }
    catch( container::ElementExistException& )
    {}
}

bool XMLTransGradientStyleContext::IsTransient() const
{
    return true;
}

XMLTransparencyStopContext::XMLTransparencyStopContext(
    SvXMLImport& rImport, sal_Int32 nElement,
    const uno::Reference< xml::sax::XFastAttributeList >& xAttrList,
    std::vector<awt::ColorStop>& rColorStopVec)
:   SvXMLStyleContext(rImport)
{
    if(nElement != XML_ELEMENT(LO_EXT, xmloff::token::XML_OPACITY_STOP))
        return;

    double fOffset = -1.0;
    css::rendering::RGBColor aRGBColor; // transparency is handled as gray color
    for (auto &aIter : sax_fastparser::castToFastAttributeList(xAttrList))
    {
        switch(aIter.getToken())
        {
        case XML_ELEMENT(SVG, xmloff::token::XML_OFFSET): // needed??
        case XML_ELEMENT(SVG_COMPAT, xmloff::token::XML_OFFSET):
            if (!::sax::Converter::convertDouble(fOffset, aIter.toView()))
                return;
            break;
        case XML_ELEMENT(SVG, xmloff::token::XML_STOP_OPACITY):
        case XML_ELEMENT(SVG_COMPAT, xmloff::token::XML_STOP_OPACITY):
            {
                double fOpacity = 1.0;
                if (!::sax::Converter::convertDouble(fOpacity, aIter.toView()))
                    return;
                // Transparency is gray, full transparent is (1|1|1).
                double fGrayComponent = std::clamp<double>(1.0 - fOpacity, 0.0, 1.0);
                aRGBColor.Red = fGrayComponent;
                aRGBColor.Green = fGrayComponent;
                aRGBColor.Blue = fGrayComponent;
            }
            break;
        default:
            XMLOFF_WARN_UNKNOWN("xmloff.style", aIter);
        }
    }

    awt::ColorStop aColorStop;
    aColorStop.StopOffset = fOffset;
    aColorStop.StopColor = aRGBColor;
    rColorStopVec.push_back(aColorStop);
}

XMLTransparencyStopContext::~XMLTransparencyStopContext()
{
}

XMLMarkerStyleContext::XMLMarkerStyleContext( SvXMLImport& rImport, sal_Int32 /*nElement*/,
                                              const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLMarkerStyleImport aMarkerStyle( GetImport() );
    aMarkerStyle.importXML( xAttrList, maAny, maStrName );
}

XMLMarkerStyleContext::~XMLMarkerStyleContext()
{
}

void XMLMarkerStyleContext::endFastElement(sal_Int32 )
{
    uno::Reference< container::XNameContainer > xMarker( GetImport().GetMarkerHelper() );

    try
    {
        if(xMarker.is())
        {
            if( xMarker->hasByName( maStrName ) )
            {
                xMarker->replaceByName( maStrName, maAny );
            }
            else
            {
                xMarker->insertByName( maStrName, maAny );
            }
        }
    }
    catch( container::ElementExistException& )
    {}
}

bool XMLMarkerStyleContext::IsTransient() const
{
    return true;
}


XMLDashStyleContext::XMLDashStyleContext( SvXMLImport& rImport, sal_Int32 /*nElement*/,
                                          const uno::Reference< xml::sax::XFastAttributeList >& xAttrList)
:   SvXMLStyleContext(rImport)
{
    // start import
    XMLDashStyleImport aDashStyle( GetImport() );
    aDashStyle.importXML( xAttrList, maAny, maStrName );
}

XMLDashStyleContext::~XMLDashStyleContext()
{
}

void XMLDashStyleContext::endFastElement(sal_Int32 )
{
    uno::Reference< container::XNameContainer > xDashes( GetImport().GetDashHelper() );

    try
    {
        if(xDashes.is())
        {
            if( xDashes->hasByName( maStrName ) )
            {
                xDashes->replaceByName( maStrName, maAny );
            }
            else
            {
                xDashes->insertByName( maStrName, maAny );
            }
        }
    }
    catch( container::ElementExistException& )
    {}
}

bool XMLDashStyleContext::IsTransient() const
{
    return true;
}

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