/* -*- 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 <svgsymbolnode.hxx>

#include <basegfx/matrix/b2dhommatrix.hxx>

#include <drawinglayer/primitive2d/transformprimitive2d.hxx>

namespace svgio::svgreader

{

        SvgSymbolNode::SvgSymbolNode(

            SvgDocument& rDocument,

            SvgNode* pParent)

        :   SvgNode(SVGToken::Symbol, rDocument, pParent),

            maSvgStyleAttributes(*this)

        {

        }

        SvgSymbolNode::~SvgSymbolNode()

        {

        }

        const SvgStyleAttributes* SvgSymbolNode::getSvgStyleAttributes() const

        {

            return &maSvgStyleAttributes;

        }

        void SvgSymbolNode::parseAttribute(SVGToken aSVGToken, const OUString& aContent)

        {

            // call parent

            SvgNode::parseAttribute(aSVGToken, aContent);

            // read style attributes

            maSvgStyleAttributes.parseStyleAttribute(aSVGToken, aContent);

            // parse own

            switch(aSVGToken)

            {

                case SVGToken::Style:

                {

                    readLocalCssStyle(aContent);

                    break;

                }

                case SVGToken::X:

                {

                    SvgNumber aNum;

                    if(readSingleNumber(aContent, aNum))

                    {

                        maX = aNum;

                    }

                    break;

                }

                case SVGToken::Y:

                {

                    SvgNumber aNum;

                    if(readSingleNumber(aContent, aNum))

                    {

                        maY = aNum;

                    }

                    break;

                }

                case SVGToken::Width:

                {

                    SvgNumber aNum;

                    if(readSingleNumber(aContent, aNum))

                    {

                        if(aNum.isPositive())

                        {

                            maWidth = aNum;

                        }

                    }

                    break;

                }

                case SVGToken::Height:

                {

                    SvgNumber aNum;

                    if(readSingleNumber(aContent, aNum))

                    {

                        if(aNum.isPositive())

                        {

                            maHeight = aNum;

                        }

                    }

                    break;

                }

                case SVGToken::ViewBox:

                {

                    const basegfx::B2DRange aRange(readViewBox(aContent, *this));

                    if(!aRange.isEmpty())

                    {

                        setViewBox(&aRange);

                    }

                    break;

                }

                case SVGToken::PreserveAspectRatio:

                {

                    maSvgAspectRatio = readSvgAspectRatio(aContent);

                    break;

                }

                default:

                {

                    break;

                }

            }

        }

        void SvgSymbolNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget, bool bReferenced) const

        {

            // decompose children

            drawinglayer::primitive2d::Primitive2DContainer aContent;

            SvgNode::decomposeSvgNode(aContent, bReferenced);

            // no geometry provided, done

            if (aContent.empty())

                return;

            // if no ViewBox append aContent without embedding

            if(nullptr == getViewBox())

            {

                rTarget.append(aContent);

                return;

            }

            // prepare range of imported geometry

            // tdf#164434 CAUTION: There *are* svg files which do not define

            // all needed data, e.g. x/y/w/h might be missing in any combination.

            // As fallback, use size of imported geometry. Do this separate for

            // position and size to do the best if only one value pair is provided

            basegfx::B2DRange aImportedRange;

            basegfx::B2DPoint aPosition;

            basegfx::B2DVector aSize;

            // evaluate position

            if (maX.isSet() && maY.isSet())

            {

                // use values from imported svg if both provided

                aPosition = basegfx::B2DPoint(

                    maX.solve(*this, NumberType::xcoordinate),

                    maY.solve(*this, NumberType::ycoordinate));

            }

            else

            {

                // fallback to imported geometry

                drawinglayer::geometry::ViewInformation2D aViewInfo;

                aImportedRange = aContent.getB2DRange(aViewInfo);

                aPosition = aImportedRange.getMinimum();

            }

            // evaluate size

            if (maWidth.isSet() && maHeight.isSet())

            {

                // use values from imported svg if both provided

                aSize = basegfx::B2DVector(

                    maWidth.solve(*this, NumberType::xcoordinate),

                    maHeight.solve(*this, NumberType::ycoordinate));

            }

            else

            {

                // fallback to imported geometry

                if (aImportedRange.isEmpty())

                {

                    drawinglayer::geometry::ViewInformation2D aViewInfo;

                    aImportedRange = aContent.getB2DRange(aViewInfo);

                }

                aSize = aImportedRange.getRange();

            }

            // tdf#164434 no size, no geometry, done

            if (0.0 == aSize.getX() || 0.0 == aSize.getY())

                return;

            // create mapping using SvgAspectRatio

            const SvgAspectRatio& rRatio = getSvgAspectRatio();

            const basegfx::B2DHomMatrix aEmbeddingTransform(

                rRatio.createMapping(basegfx::B2DRange(aPosition, aPosition + aSize), *getViewBox()));

            // prepare embedding in transformation

            // create embedding group element with transformation

            const drawinglayer::primitive2d::Primitive2DReference xRef(

                new drawinglayer::primitive2d::TransformPrimitive2D(

                    aEmbeddingTransform,

                    drawinglayer::primitive2d::Primitive2DContainer(std::move(aContent))));

            // add embedded geometry to result

            rTarget.push_back(xRef);

        }

} // end of namespace svgio::svgreader

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