/* -*- 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 "OverlayRanges.hxx"
#include <view.hxx>
#include <svx/sdrpaintwindow.hxx>
#include <svx/svdview.hxx>
#include <svx/sdr/overlay/overlaymanager.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>

namespace
{
    // combine ranges geometrically to a single, ORed polygon
    basegfx::B2DPolyPolygon impCombineRangesToPolyPolygon(const std::vector< basegfx::B2DRange >& rRanges)
    {
        const sal_uInt32 nCount(rRanges.size());
        basegfx::B2DPolyPolygon aRetval;

        for(sal_uInt32 a(0); a < nCount; a++)
        {
            const basegfx::B2DPolygon aDiscretePolygon(basegfx::utils::createPolygonFromRect(rRanges[a]));

            if(0 == a)
            {
                aRetval.append(aDiscretePolygon);
            }
            else
            {
                aRetval = basegfx::utils::solvePolygonOperationOr(aRetval, basegfx::B2DPolyPolygon(aDiscretePolygon));
            }
        }

        return aRetval;
    }
}

namespace sw
{
    namespace overlay
    {
        drawinglayer::primitive2d::Primitive2DContainer OverlayRanges::createOverlayObjectPrimitive2DSequence()
        {
            const sal_uInt32 nCount(getRanges().size());
            drawinglayer::primitive2d::Primitive2DContainer aRetval;
            aRetval.resize(nCount);
            for ( sal_uInt32 a = 0; a < nCount; ++a )
            {
                const basegfx::BColor aRGBColor(getBaseColor().getBColor());
                const basegfx::B2DPolygon aPolygon(basegfx::utils::createPolygonFromRect(maRanges[a]));
                aRetval[a] = drawinglayer::primitive2d::Primitive2DReference(
                    new drawinglayer::primitive2d::PolyPolygonColorPrimitive2D(
                    basegfx::B2DPolyPolygon(aPolygon),
                    aRGBColor));
            }
            // embed all rectangles in transparent paint
            const SvtOptionsDrawinglayer aSvtOptionsDrawinglayer;
            const sal_uInt16 nTransparence( aSvtOptionsDrawinglayer.GetTransparentSelectionPercent() );
            const double fTransparence( nTransparence / 100.0 );
            const drawinglayer::primitive2d::Primitive2DReference aUnifiedTransparence(
                new drawinglayer::primitive2d::UnifiedTransparencePrimitive2D(
                aRetval,
                fTransparence));

            if ( mbShowSolidBorder )
            {
                const basegfx::BColor aRGBColor(getBaseColor().getBColor());
                const basegfx::B2DPolyPolygon aPolyPolygon(impCombineRangesToPolyPolygon(getRanges()));
                const drawinglayer::primitive2d::Primitive2DReference aOutline(
                    new drawinglayer::primitive2d::PolyPolygonHairlinePrimitive2D(
                    aPolyPolygon,
                    aRGBColor));

                aRetval.resize(2);
                aRetval[0] = aUnifiedTransparence;
                aRetval[1] = aOutline;
            }
            else
            {
                aRetval = drawinglayer::primitive2d::Primitive2DContainer { aUnifiedTransparence };
            }

            return aRetval;
        }

        /*static*/ std::unique_ptr<OverlayRanges> OverlayRanges::CreateOverlayRange(
            SwView const & rDocView,
            const Color& rColor,
            const std::vector< basegfx::B2DRange >& rRanges,
            const bool bShowSolidBorder )
        {
            std::unique_ptr<OverlayRanges> pOverlayRanges;

            SdrView* pView = rDocView.GetDrawView();
            if ( pView != nullptr )
            {
                SdrPaintWindow* pCandidate = pView->GetPaintWindow(0);
                const rtl::Reference<sdr::overlay::OverlayManager>& xTargetOverlay = pCandidate->GetOverlayManager();

                if ( xTargetOverlay.is() )
                {
                    pOverlayRanges.reset(new sw::overlay::OverlayRanges( rColor, rRanges, bShowSolidBorder ));
                    xTargetOverlay->add( *pOverlayRanges );
                }
            }

            return pOverlayRanges;
        }

        OverlayRanges::OverlayRanges(
            const Color& rColor,
            const std::vector< basegfx::B2DRange >& rRanges,
            const bool bShowSolidBorder )
            : sdr::overlay::OverlayObject( rColor )
            , maRanges( rRanges )
            , mbShowSolidBorder( bShowSolidBorder )
        {
            // no AA for highlight overlays
            allowAntiAliase(false);
        }

        OverlayRanges::~OverlayRanges()
        {
            if( getOverlayManager() )
            {
                getOverlayManager()->remove(*this);
            }
        }

        void OverlayRanges::setRanges(const std::vector< basegfx::B2DRange >& rNew)
        {
            if(rNew != maRanges)
            {
                maRanges = rNew;
                objectChange();
            }
        }

        void OverlayRanges::ShowSolidBorder()
        {
            if ( !mbShowSolidBorder )
            {
                mbShowSolidBorder = true;
                objectChange();
            }
        }

        void OverlayRanges::HideSolidBorder()
        {
            if ( mbShowSolidBorder )
            {
                mbShowSolidBorder = false;
                objectChange();
            }
        }

    } // end of namespace overlay
} // end of namespace sdr

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