/* -*- 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 <basegfx/point/b2dpoint.hxx>

#include <basegfx/range/b2drectangle.hxx>

#include <basegfx/polygon/b2dpolygon.hxx>

#include <basegfx/polygon/b2dpolygontools.hxx>

#include <basegfx/polygon/b2dpolypolygon.hxx>

#include <sal/log.hxx>

#include "emfpregion.hxx"

#include "emfppath.hxx"

namespace emfplushelper

{

    EMFPRegion::EMFPRegion()

    {

    }

    EMFPRegion::~EMFPRegion()

    {

    }

    ::basegfx::B2DPolyPolygon EMFPRegion::ReadRegionNode(SvStream& s, EmfPlusHelperData& rR, int nDepth)

    {

        // Regions are specified as a binary tree of region nodes, and each node must either be a terminal node

        // (RegionNodeDataTypeRect, RegionNodeDataTypePath, RegionNodeDataTypeEmpty, RegionNodeDataTypeInfinite)

        // or specify one or two child nodes

        // (RegionNodeDataTypeAnd, RegionNodeDataTypeOr, RegionNodeDataTypeXor,

        // RegionNodeDataTypeExclude, RegionNodeDataTypeComplement).

        constexpr int nMaxDepth = 2048;

        if (nDepth >= nMaxDepth)

        {

            SAL_WARN("drawinglayer.emf", "EMF+\t Region node too deeply nested (>" << nMaxDepth << ")");

            return {};

        }

        sal_uInt32 dataType(0);

        ::basegfx::B2DPolyPolygon polygon;

        s.ReadUInt32(dataType);

        SAL_INFO("drawinglayer.emf", "EMF+\t Region node data type 0x" << std::hex << dataType << std::dec);

        switch (dataType)

        {

        case RegionNodeDataTypeAnd: // CombineModeIntersect

        case RegionNodeDataTypeOr: // CombineModeUnion

        case RegionNodeDataTypeXor: // CombineModeXOR

        case RegionNodeDataTypeExclude: // CombineModeExclude

        case RegionNodeDataTypeComplement: // CombineModeComplement

        {

            ::basegfx::B2DPolyPolygon leftPolygon = ReadRegionNode(s, rR, nDepth + 1);

            ::basegfx::B2DPolyPolygon rightPolygon = ReadRegionNode(s, rR, nDepth + 1);

            polygon = EmfPlusHelperData::combineClip(leftPolygon, dataType, rightPolygon);

            break;

        }

        case RegionNodeDataTypeRect:

        {

            float dx(0), dy(0), dw(0), dh(0);

            s.ReadFloat(dx).ReadFloat(dy).ReadFloat(dw).ReadFloat(dh);

            SAL_INFO("drawinglayer.emf", "EMF+\t\t RegionNodeDataTypeRect x:" << dx << ", y:" << dy <<

                     ", width:" << dw << ", height:" << dh);

            const ::basegfx::B2DPoint mappedStartPoint(rR.Map(dx, dy));

            const ::basegfx::B2DPoint mappedEndPoint(rR.Map(dx + dw, dy + dh));

            polygon = ::basegfx::B2DPolyPolygon(

                    ::basegfx::utils::createPolygonFromRect(

                        ::basegfx::B2DRectangle(

                            mappedStartPoint.getX(),

                            mappedStartPoint.getY(),

                            mappedEndPoint.getX(),

                            mappedEndPoint.getY())));

            break;

        }

        case RegionNodeDataTypePath:

        {

            sal_Int32 pathLength(0);

            s.ReadInt32(pathLength);

            SAL_INFO("drawinglayer.emf", "EMF+\t\t RegionNodeDataTypePath, Path Length: " << pathLength << " bytes");

            sal_uInt32 header(0), pathFlags(0);

            sal_Int32 points(0);

            s.ReadUInt32(header).ReadInt32(points).ReadUInt32(pathFlags);

            SAL_INFO("drawinglayer.emf", "EMF+\t\t header: 0x" << std::hex << header <<

                     " points: " << std::dec << points << " additional flags: 0x" << std::hex << pathFlags << std::dec);

            EMFPPath path(points);

            path.Read(s, pathFlags);

            polygon = path.GetPolygon(rR);

            break;

        }

        case RegionNodeDataTypeEmpty:

        {

            SAL_INFO("drawinglayer.emf", "EMF+\t\t RegionNodeDataTypeEmpty");

            SAL_WARN("drawinglayer.emf", "EMF+\t\t TODO we need to set empty polygon here");

            polygon = ::basegfx::B2DPolyPolygon();

            break;

        }

        case RegionNodeDataTypeInfinite:

        {

            SAL_INFO("drawinglayer.emf", "EMF+\t\t RegionNodeDataTypeInfinite");

            polygon = ::basegfx::B2DPolyPolygon();

            break;

        }

        default:

        {

            SAL_WARN("drawinglayer.emf", "EMF+\t\t Unhandled region type: 0x" << std::hex << dataType << std::dec);

            polygon = ::basegfx::B2DPolyPolygon();

        }

        }

        return polygon;

    }

    void EMFPRegion::ReadRegion(SvStream& s, EmfPlusHelperData& rR)

    {

        sal_uInt32 header(0), count(0);

        s.ReadUInt32(header).ReadUInt32(count);

        // An array should be RegionNodeCount+1 of EmfPlusRegionNode objects.

        SAL_INFO("drawinglayer.emf", "EMF+\t version: 0x" << std::hex << header << std::dec << ", region node count: " << count);

        regionPolyPolygon = ReadRegionNode(s, rR, 0);

    }

}

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