libreoffice/sw/source/core/crsr/overlayrangesoutline.cxx

/* -*- 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 <overlayrangesoutline.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>

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::tools::createPolygonFromRect(rRanges[a]));

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

        return aRetval;
    }
}

namespace sw
{
    namespace overlay
    {
        drawinglayer::primitive2d::Primitive2DSequence OverlayRangesOutline::createOverlayObjectPrimitive2DSequence()
        {
            drawinglayer::primitive2d::Primitive2DSequence aRetval;
            const sal_uInt32 nCount(getRanges().size());

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

                aRetval.realloc(1);
                aRetval[0] = aOutline;
            }

            return aRetval;
        }

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

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

        void OverlayRangesOutline::setRanges(const std::vector< basegfx::B2DRange >& rNew)
        {
            if(rNew != maRanges)
            {
                maRanges = rNew;
                objectChange();
            }
        }
    } // end of namespace overlay
} // end of namespace sdr

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