sdrdecompositiontools.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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#include <sdr/primitive2d/sdrdecompositiontools.hxx>
#include <drawinglayer/primitive2d/baseprimitive2d.hxx>
#include <drawinglayer/primitive2d/PolyPolygonGradientPrimitive2D.hxx>
#include <drawinglayer/primitive2d/PolyPolygonHatchPrimitive2D.hxx>
#include <drawinglayer/primitive2d/PolyPolygonGraphicPrimitive2D.hxx>
#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
#include <drawinglayer/primitive2d/softedgeprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
#include <drawinglayer/primitive2d/transparenceprimitive2d.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <drawinglayer/primitive2d/fillgradientprimitive2d.hxx>
#include <drawinglayer/attribute/strokeattribute.hxx>
#include <drawinglayer/attribute/linestartendattribute.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/attribute/sdrfillgraphicattribute.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <drawinglayer/primitive2d/shadowprimitive2d.hxx>
#include <sdr/attribute/sdrtextattribute.hxx>
#include <drawinglayer/primitive2d/glowprimitive2d.hxx>
#include <sdr/primitive2d/sdrtextprimitive2d.hxx>
#include <svx/svdotext.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <drawinglayer/primitive2d/animatedprimitive2d.hxx>
#include <drawinglayer/animation/animationtiming.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>
#include <drawinglayer/primitive2d/texthierarchyprimitive2d.hxx>
#include <drawinglayer/attribute/sdrfillattribute.hxx>
#include <drawinglayer/attribute/sdrlineattribute.hxx>
#include <drawinglayer/attribute/sdrlinestartendattribute.hxx>
#include <drawinglayer/attribute/sdrshadowattribute.hxx>
#include <drawinglayer/attribute/sdrglowattribute.hxx>


using namespace com::sun::star;


namespace drawinglayer::primitive2d
{

        class TransparencePrimitive2D;

        Primitive2DReference createPolyPolygonFillPrimitive(
            const basegfx::B2DPolyPolygon& rPolyPolygon,
            const attribute::SdrFillAttribute& rFill,
            const attribute::FillGradientAttribute& rFillGradient)
        {
            // when we have no given definition range, use the range of the given geometry
            // also for definition (simplest case)
            const basegfx::B2DRange aRange(basegfx::utils::getRange(rPolyPolygon));

            return createPolyPolygonFillPrimitive(
                rPolyPolygon,
                aRange,
                rFill,
                rFillGradient);
        }

        Primitive2DReference createPolyPolygonFillPrimitive(
            const basegfx::B2DPolyPolygon& rPolyPolygon,
            const basegfx::B2DRange& rDefinitionRange,
            const attribute::SdrFillAttribute& rFill,
            const attribute::FillGradientAttribute& rFillGradient)
        {
            if(basegfx::fTools::moreOrEqual(rFill.getTransparence(), 1.0))
            {
                return Primitive2DReference();
            }

            // prepare fully scaled polygon
            BasePrimitive2D* pNewFillPrimitive = nullptr;

            if(!rFill.getGradient().isDefault())
            {
                pNewFillPrimitive = new PolyPolygonGradientPrimitive2D(
                    rPolyPolygon,
                    rDefinitionRange,
                    rFill.getGradient());
            }
            else if(!rFill.getHatch().isDefault())
            {
                pNewFillPrimitive = new PolyPolygonHatchPrimitive2D(
                    rPolyPolygon,
                    rDefinitionRange,
                    rFill.getColor(),
                    rFill.getHatch());
            }
            else if(!rFill.getFillGraphic().isDefault())
            {
                pNewFillPrimitive = new PolyPolygonGraphicPrimitive2D(
                    rPolyPolygon,
                    rDefinitionRange,
                    rFill.getFillGraphic().createFillGraphicAttribute(rDefinitionRange));
            }
            else
            {
                pNewFillPrimitive = new PolyPolygonColorPrimitive2D(
                    rPolyPolygon,
                    rFill.getColor());
            }

            if(0.0 != rFill.getTransparence())
            {
                // create simpleTransparencePrimitive, add created fill primitive
                const Primitive2DReference xRefA(pNewFillPrimitive);
                const Primitive2DContainer aContent { xRefA };
                return Primitive2DReference(new UnifiedTransparencePrimitive2D(aContent, rFill.getTransparence()));
            }
            else if(!rFillGradient.isDefault())
            {
                // create sequence with created fill primitive
                const Primitive2DReference xRefA(pNewFillPrimitive);
                const Primitive2DContainer aContent { xRefA };

                // create FillGradientPrimitive2D for transparence and add to new sequence
                // fillGradientPrimitive is enough here (compared to PolyPolygonGradientPrimitive2D) since float transparence will be masked anyways
                const basegfx::B2DRange aRange(basegfx::utils::getRange(rPolyPolygon));
                const Primitive2DReference xRefB(
                    new FillGradientPrimitive2D(
                        aRange,
                        rDefinitionRange,
                        rFillGradient));
                const Primitive2DContainer aAlpha { xRefB };

                // create TransparencePrimitive2D using alpha and content
                return Primitive2DReference(new TransparencePrimitive2D(aContent, aAlpha));
            }
            else
            {
                // add to decomposition
                return Primitive2DReference(pNewFillPrimitive);
            }
        }

        Primitive2DReference createPolygonLinePrimitive(
            const basegfx::B2DPolygon& rPolygon,
            const attribute::SdrLineAttribute& rLine,
            const attribute::SdrLineStartEndAttribute& rStroke)
        {
            // create line and stroke attribute
            const attribute::LineAttribute aLineAttribute(rLine.getColor(), rLine.getWidth(), rLine.getJoin(), rLine.getCap());
            const attribute::StrokeAttribute aStrokeAttribute(rLine.getDotDashArray(), rLine.getFullDotDashLen());
            BasePrimitive2D* pNewLinePrimitive = nullptr;

            if(!rPolygon.isClosed() && !rStroke.isDefault())
            {
                attribute::LineStartEndAttribute aStart(rStroke.getStartWidth(), rStroke.getStartPolyPolygon(), rStroke.isStartCentered());
                attribute::LineStartEndAttribute aEnd(rStroke.getEndWidth(), rStroke.getEndPolyPolygon(), rStroke.isEndCentered());

                // create data
                pNewLinePrimitive = new PolygonStrokeArrowPrimitive2D(rPolygon, aLineAttribute, aStrokeAttribute, aStart, aEnd);
            }
            else
            {
                // create data
                pNewLinePrimitive = new PolygonStrokePrimitive2D(rPolygon, aLineAttribute, aStrokeAttribute);
            }

            if(0.0 != rLine.getTransparence())
            {
                // create simpleTransparencePrimitive, add created fill primitive
                const Primitive2DReference xRefA(pNewLinePrimitive);
                const Primitive2DContainer aContent { xRefA };
                return Primitive2DReference(new UnifiedTransparencePrimitive2D(aContent, rLine.getTransparence()));
            }
            else
            {
                // add to decomposition
                return Primitive2DReference(pNewLinePrimitive);
            }
        }

        Primitive2DReference createTextPrimitive(
            const basegfx::B2DPolyPolygon& rUnitPolyPolygon,
            const basegfx::B2DHomMatrix& rObjectTransform,
            const attribute::SdrTextAttribute& rText,
            const attribute::SdrLineAttribute& rStroke,
            bool bCellText,
            bool bWordWrap)
        {
            basegfx::B2DHomMatrix aAnchorTransform(rObjectTransform);
            rtl::Reference<SdrTextPrimitive2D> pNew;

            if(rText.isContour())
            {
                // contour text
                if(!rStroke.isDefault() && 0.0 != rStroke.getWidth())
                {
                    // take line width into account and shrink contour polygon accordingly
                    // decompose to get scale
                    basegfx::B2DVector aScale, aTranslate;
                    double fRotate, fShearX;
                    rObjectTransform.decompose(aScale, aTranslate, fRotate, fShearX);

                    // scale outline to object's size to allow growing with value relative to that size
                    // and also to keep aspect ratio
                    basegfx::B2DPolyPolygon aScaledUnitPolyPolygon(rUnitPolyPolygon);
                    aScaledUnitPolyPolygon.transform(basegfx::utils::createScaleB2DHomMatrix(
                        fabs(aScale.getX()), fabs(aScale.getY())));

                    // grow the polygon. To shrink, use negative value (half width)
                    aScaledUnitPolyPolygon = basegfx::utils::growInNormalDirection(aScaledUnitPolyPolygon, -(rStroke.getWidth() * 0.5));

                    // scale back to unit polygon
                    aScaledUnitPolyPolygon.transform(basegfx::utils::createScaleB2DHomMatrix(
                        0.0 != aScale.getX() ? 1.0 / aScale.getX() : 1.0,
                        0.0 != aScale.getY() ? 1.0 / aScale.getY() : 1.0));

                    // create with unit polygon
                    pNew = new SdrContourTextPrimitive2D(
                        &rText.getSdrText(),
                        rText.getOutlinerParaObject(),
                        aScaledUnitPolyPolygon,
                        rObjectTransform);
                }
                else
                {
                    // create with unit polygon
                    pNew = new SdrContourTextPrimitive2D(
                        &rText.getSdrText(),
                        rText.getOutlinerParaObject(),
                        rUnitPolyPolygon,
                        rObjectTransform);
                }
            }
            else if(!rText.getSdrFormTextAttribute().isDefault())
            {
                // text on path, use scaled polygon
                basegfx::B2DPolyPolygon aScaledPolyPolygon(rUnitPolyPolygon);
                aScaledPolyPolygon.transform(rObjectTransform);
                pNew = new SdrPathTextPrimitive2D(
                    &rText.getSdrText(),
                    rText.getOutlinerParaObject(),
                    aScaledPolyPolygon,
                    rText.getSdrFormTextAttribute());
            }
            else
            {
                // rObjectTransform is the whole SdrObject transformation from unit rectangle
                // to its size and position. Decompose to allow working with single values.
                basegfx::B2DVector aScale, aTranslate;
                double fRotate, fShearX;
                rObjectTransform.decompose(aScale, aTranslate, fRotate, fShearX);

                // extract mirroring
                const bool bMirrorX(basegfx::fTools::less(aScale.getX(), 0.0));
                const bool bMirrorY(basegfx::fTools::less(aScale.getY(), 0.0));
                aScale = basegfx::absolute(aScale);

                // Get the real size, since polygon outline and scale
                // from the object transformation may vary (e.g. ellipse segments)
                basegfx::B2DHomMatrix aJustScaleTransform;
                aJustScaleTransform.set(0, 0, aScale.getX());
                aJustScaleTransform.set(1, 1, aScale.getY());
                basegfx::B2DPolyPolygon aScaledUnitPolyPolygon(rUnitPolyPolygon);
                aScaledUnitPolyPolygon.transform(aJustScaleTransform);
                const basegfx::B2DRange aSnapRange(basegfx::utils::getRange(aScaledUnitPolyPolygon));

                // create a range describing the wanted text position and size (aTextAnchorRange). This
                // means to use the text distance values here
                sal_Int32 nTextLeftDistance = rText.getTextLeftDistance();
                // If the margin is larger than the entire width of the text area, then limit the
                // margin.
                if (nTextLeftDistance > aSnapRange.getWidth())
                    nTextLeftDistance = aSnapRange.getWidth();
                sal_Int32 nTextRightDistance = rText.getTextRightDistance();
                if (nTextRightDistance > aSnapRange.getWidth())
                    nTextRightDistance = aSnapRange.getWidth();
                const basegfx::B2DPoint aTopLeft(aSnapRange.getMinX() + nTextLeftDistance,
                                                 aSnapRange.getMinY()
                                                     + rText.getTextUpperDistance());
                const basegfx::B2DPoint aBottomRight(aSnapRange.getMaxX() - nTextRightDistance,
                                                     aSnapRange.getMaxY()
                                                         - rText.getTextLowerDistance());
                basegfx::B2DRange aTextAnchorRange;
                aTextAnchorRange.expand(aTopLeft);
                aTextAnchorRange.expand(aBottomRight);

                if (aTextAnchorRange.getWidth() == 0)
                {
                    // If the shape has no width, then don't attempt to break the text into multiple
                    // lines, not a single character would satisfy a zero width requirement.
                    // SdrTextObj::impDecomposeBlockTextPrimitive() uses the same constant to
                    // effectively set no limits.
                    aTextAnchorRange.expand(
                        basegfx::B2DPoint(aTopLeft.getX() - 1000000, aTopLeft.getY()));
                    aTextAnchorRange.expand(
                        basegfx::B2DPoint(aBottomRight.getX() + 1000000, aBottomRight.getY()));
                }

                // now create a transformation from this basic range (aTextAnchorRange)
                // #i121494# if we have no scale use at least 1.0 to have a carrier e.g. for
                // mirror values, else these will get lost
                aAnchorTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(
                    basegfx::fTools::equalZero(aTextAnchorRange.getWidth()) ? 1.0 : aTextAnchorRange.getWidth(),
                    basegfx::fTools::equalZero(aTextAnchorRange.getHeight()) ? 1.0 : aTextAnchorRange.getHeight(),
                    aTextAnchorRange.getMinX(), aTextAnchorRange.getMinY());

                // apply mirroring
                aAnchorTransform.scale(bMirrorX ? -1.0 : 1.0, bMirrorY ? -1.0 : 1.0);

                // apply object's other transforms
                aAnchorTransform = basegfx::utils::createShearXRotateTranslateB2DHomMatrix(fShearX, fRotate, aTranslate)
                    * aAnchorTransform;

                if(rText.isFitToSize())
                {
                    // stretched text in range
                    pNew = new SdrStretchTextPrimitive2D(
                        &rText.getSdrText(),
                        rText.getOutlinerParaObject(),
                        aAnchorTransform,
                        rText.isFixedCellHeight());
                }
                else if(rText.isAutoFit())
                {
                    // isotropically scaled text in range
                    pNew = new SdrAutoFitTextPrimitive2D(
                                    &rText.getSdrText(),
                                    rText.getOutlinerParaObject(),
                                    aAnchorTransform,
                                    bWordWrap);
                }
                else if( rText.isChainable() && !rText.isInEditMode() )
                {
                    pNew = new SdrChainedTextPrimitive2D(
                                    &rText.getSdrText(),
                                    rText.getOutlinerParaObject(),
                                    aAnchorTransform );
                }
                else // text in range
                {
                    // build new primitive
                    pNew = new SdrBlockTextPrimitive2D(
                        &rText.getSdrText(),
                        rText.getOutlinerParaObject(),
                        aAnchorTransform,
                        rText.getSdrTextHorzAdjust(),
                        rText.getSdrTextVertAdjust(),
                        rText.isFixedCellHeight(),
                        rText.isScroll(),
                        bCellText,
                        bWordWrap);
                }
            }

            OSL_ENSURE(pNew != nullptr, "createTextPrimitive: no text primitive created (!)");

            if(rText.isBlink())
            {
                // prepare animation and primitive list
                drawinglayer::animation::AnimationEntryList aAnimationList;
                rText.getBlinkTextTiming(aAnimationList);

                if(0.0 != aAnimationList.getDuration())
                {
                    // create content sequence
                    const Primitive2DReference xRefA(pNew);
                    const Primitive2DContainer aContent { xRefA };

                    // create and add animated switch primitive
                    return Primitive2DReference(new AnimatedBlinkPrimitive2D(aAnimationList, aContent));
                }
                else
                {
                    // add to decomposition
                    return Primitive2DReference(pNew);
                }
            }

            if(rText.isScroll())
            {
                // suppress scroll when FontWork
                if(rText.getSdrFormTextAttribute().isDefault())
                {
                    // get scroll direction
                    const SdrTextAniDirection eDirection(rText.getSdrText().GetObject().GetTextAniDirection());
                    const bool bHorizontal(SdrTextAniDirection::Left == eDirection || SdrTextAniDirection::Right == eDirection);

                    // decompose to get separated values for the scroll box
                    basegfx::B2DVector aScale, aTranslate;
                    double fRotate, fShearX;
                    aAnchorTransform.decompose(aScale, aTranslate, fRotate, fShearX);

                    // build transform from scaled only to full AnchorTransform and inverse
                    const basegfx::B2DHomMatrix aSRT(basegfx::utils::createShearXRotateTranslateB2DHomMatrix(
                        fShearX, fRotate, aTranslate));
                    basegfx::B2DHomMatrix aISRT(aSRT);
                    aISRT.invert();

                    // bring the primitive back to scaled only and get scaled range, create new clone for this
                    rtl::Reference<SdrTextPrimitive2D> pNew2 = pNew->createTransformedClone(aISRT);
                    OSL_ENSURE(pNew2, "createTextPrimitive: Could not create transformed clone of text primitive (!)");
                    pNew = pNew2.get();

                    // create neutral geometry::ViewInformation2D for local range and decompose calls. This is okay
                    // since the decompose is view-independent
                    const uno::Sequence< beans::PropertyValue > xViewParameters;
                    geometry::ViewInformation2D aViewInformation2D(xViewParameters);

                    // get range
                    const basegfx::B2DRange aScaledRange(pNew->getB2DRange(aViewInformation2D));

                    // create left outside and right outside transformations. Also take care
                    // of the clip rectangle
                    basegfx::B2DHomMatrix aLeft, aRight;
                    basegfx::B2DPoint aClipTopLeft(0.0, 0.0);
                    basegfx::B2DPoint aClipBottomRight(aScale.getX(), aScale.getY());

                    if(bHorizontal)
                    {
                        aClipTopLeft.setY(aScaledRange.getMinY());
                        aClipBottomRight.setY(aScaledRange.getMaxY());
                        aLeft.translate(-aScaledRange.getMaxX(), 0.0);
                        aRight.translate(aScale.getX() - aScaledRange.getMinX(), 0.0);
                    }
                    else
                    {
                        aClipTopLeft.setX(aScaledRange.getMinX());
                        aClipBottomRight.setX(aScaledRange.getMaxX());
                        aLeft.translate(0.0, -aScaledRange.getMaxY());
                        aRight.translate(0.0, aScale.getY() - aScaledRange.getMinY());
                    }

                    aLeft *= aSRT;
                    aRight *= aSRT;

                    // prepare animation list
                    drawinglayer::animation::AnimationEntryList aAnimationList;

                    if(bHorizontal)
                    {
                        rText.getScrollTextTiming(aAnimationList, aScale.getX(), aScaledRange.getWidth());
                    }
                    else
                    {
                        rText.getScrollTextTiming(aAnimationList, aScale.getY(), aScaledRange.getHeight());
                    }

                    if(0.0 != aAnimationList.getDuration())
                    {
                        // create a new Primitive2DContainer containing the animated text in its scaled only state.
                        // use the decomposition to force to simple text primitives, those will no longer
                        // need the outliner for formatting (alternatively it is also possible to just add
                        // pNew to aNewPrimitiveSequence)
                        Primitive2DContainer aAnimSequence;
                        pNew->get2DDecomposition(aAnimSequence, aViewInformation2D);
                        pNew.clear();

                        // create a new animatedInterpolatePrimitive and add it
                        std::vector< basegfx::B2DHomMatrix > aMatrixStack;
                        aMatrixStack.push_back(aLeft);
                        aMatrixStack.push_back(aRight);
                        const Primitive2DReference xRefA(new AnimatedInterpolatePrimitive2D(aMatrixStack, aAnimationList, aAnimSequence));
                        const Primitive2DContainer aContent { xRefA };

                        // scrolling needs an encapsulating clipping primitive
                        const basegfx::B2DRange aClipRange(aClipTopLeft, aClipBottomRight);
                        basegfx::B2DPolygon aClipPolygon(basegfx::utils::createPolygonFromRect(aClipRange));
                        aClipPolygon.transform(aSRT);
                        return Primitive2DReference(new MaskPrimitive2D(basegfx::B2DPolyPolygon(aClipPolygon), aContent));
                    }
                    else
                    {
                        // add to decomposition
                        return Primitive2DReference(pNew);
                    }
                }
            }

            if(rText.isInEditMode())
            {
                // #i97628#
                // encapsulate with TextHierarchyEditPrimitive2D to allow renderers
                // to suppress actively edited content if needed
                const Primitive2DReference xRefA(pNew);
                const Primitive2DContainer aContent { xRefA };

                // create and add TextHierarchyEditPrimitive2D primitive
                return Primitive2DReference(new TextHierarchyEditPrimitive2D(aContent));
            }
            else
            {
                // add to decomposition
                return pNew;
            }
        }

        Primitive2DContainer createEmbeddedShadowPrimitive(
            const Primitive2DContainer& rContent,
            const attribute::SdrShadowAttribute& rShadow,
            const basegfx::B2DHomMatrix& rObjectMatrix,
            const Primitive2DContainer* pContentForShadow)
        {
            if(!rContent.empty())
            {
                Primitive2DContainer aRetval(2);
                basegfx::B2DHomMatrix aShadowOffset;

                {
                    if(rShadow.getSize().getX() != 100000)
                    {
                        basegfx::B2DTuple aScale;
                        basegfx::B2DTuple aTranslate;
                        double fRotate = 0;
                        double fShearX = 0;
                        rObjectMatrix.decompose(aScale, aTranslate, fRotate, fShearX);
                        // Scale the shadow
                        double nTranslateX = aTranslate.getX();
                        double nTranslateY = aTranslate.getY();

                        // The origin for scaling is the top left corner by default. A negative
                        // shadow offset changes the origin.
                        if (rShadow.getOffset().getX() < 0)
                            nTranslateX += aScale.getX();
                        if (rShadow.getOffset().getY() < 0)
                            nTranslateY += aScale.getY();

                        aShadowOffset.translate(-nTranslateX, -nTranslateY);
                        aShadowOffset.scale(rShadow.getSize().getX() * 0.00001, rShadow.getSize().getY() * 0.00001);
                        aShadowOffset.translate(nTranslateX, nTranslateY);
                    }

                    aShadowOffset.translate(rShadow.getOffset().getX(), rShadow.getOffset().getY());
                }

                // create shadow primitive and add content
                aRetval[0] = Primitive2DReference(
                    new ShadowPrimitive2D(
                        aShadowOffset,
                        rShadow.getColor(),
                        rShadow.getBlur(),
                        (pContentForShadow ? *pContentForShadow : rContent)));

                if(0.0 != rShadow.getTransparence())
                {
                    // create SimpleTransparencePrimitive2D
                    const Primitive2DContainer aTempContent { aRetval[0] };

                    aRetval[0] = Primitive2DReference(
                        new UnifiedTransparencePrimitive2D(
                            aTempContent,
                            rShadow.getTransparence()));
                }

                aRetval[1] = Primitive2DReference(new GroupPrimitive2D(rContent));
                return aRetval;
            }
            else
            {
                return rContent;
            }
        }

        Primitive2DContainer createEmbeddedGlowPrimitive(
            const Primitive2DContainer& rContent,
            const attribute::SdrGlowAttribute& rGlow)
        {
            if(rContent.empty())
                return rContent;
            Primitive2DContainer aRetval(2);
            aRetval[0] = Primitive2DReference(
                new GlowPrimitive2D(rGlow.getColor(), rGlow.getRadius(), rContent));
            aRetval[1] = Primitive2DReference(new GroupPrimitive2D(rContent));
            return aRetval;
        }

        Primitive2DContainer createEmbeddedSoftEdgePrimitive(const Primitive2DContainer& rContent,
                                                             sal_Int32 nRadius)
        {
            if (rContent.empty() || !nRadius)
                return rContent;
            Primitive2DContainer aRetval(1);
            aRetval[0] = Primitive2DReference(new SoftEdgePrimitive2D(nRadius, rContent));
            return aRetval;
        }

} // end of namespace

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