path: root/svx/source/svdraw/svdotextpathdecomposition.cxx

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 *
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 * 
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: svdotextpathdecomposition.cxx,v $
 *
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 * GNU Lesser General Public License version 3 for more details
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include <svx/svdotext.hxx>
#include <svx/svdoutl.hxx>
#include <basegfx/vector/b2dvector.hxx>
#include <svx/sdr/primitive2d/sdrtextprimitive2d.hxx>
#include <basegfx/range/b2drange.hxx>
#include <vcl/salbtype.hxx>
#include <svtools/itemset.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <algorithm>
#include <svx/xtextit.hxx>
#include <svx/xftshtit.hxx>
#include <vcl/virdev.hxx>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/i18n/ScriptType.hdl>
#include <com/sun/star/i18n/XBreakIterator.hpp>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/i18n/CharacterIteratorMode.hdl>
#include <unolingu.hxx>
#include <drawinglayer/primitive2d/textlayoutdevice.hxx>
#include <drawinglayer/primitive2d/textprimitive2d.hxx>
#include <basegfx/color/bcolor.hxx>

//////////////////////////////////////////////////////////////////////////////
// primitive decomposition helpers

#include <basegfx/polygon/b2dlinegeometry.hxx>
#include <drawinglayer/attribute/strokeattribute.hxx>
#include <svx/xlnclit.hxx>
#include <svx/xlntrit.hxx>
#include <svx/xlnwtit.hxx>
#include <xlinjoit.hxx>
#include <svx/xlndsit.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedalphaprimitive2d.hxx>
#include <editstat.hxx>
#include <unoapi.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>
#include <svx/sdr/attribute/sdrformtextoutlineattribute.hxx>

//////////////////////////////////////////////////////////////////////////////

using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::i18n;

//////////////////////////////////////////////////////////////////////////////
// PathTextPortion helper

namespace
{
    class impPathTextPortion
    {
        basegfx::B2DVector							maOffset;
        String										maText;
        xub_StrLen									mnTextStart;
        xub_StrLen									mnTextLength;
        sal_uInt16									mnParagraph;
        xub_StrLen									mnIndex;
        SvxFont										maFont;
        ::std::vector< double >						maDblDXArray;	// double DXArray, font size independent -> unit coordinate system
        ::com::sun::star::lang::Locale				maLocale;

        // bitfield
        unsigned									mbRTL : 1;

    public:
        impPathTextPortion(DrawPortionInfo& rInfo)
        :	maOffset(rInfo.mrStartPos.X(), rInfo.mrStartPos.Y()),
            maText(rInfo.mrText),
            mnTextStart(rInfo.mnTextStart),
            mnTextLength(rInfo.mnTextLen),
            mnParagraph(rInfo.mnPara),
            mnIndex(rInfo.mnIndex),
            maFont(rInfo.mrFont),
            maDblDXArray(),
            maLocale(rInfo.mpLocale ? *rInfo.mpLocale : ::com::sun::star::lang::Locale()),
            mbRTL(rInfo.mrFont.IsVertical() ? false : rInfo.IsRTL())
        {
            if(mnTextLength)
            {
                maDblDXArray.reserve(mnTextLength);
                const sal_Int32 nFontWidth(0L == maFont.GetWidth() ? maFont.GetHeight() : maFont.GetWidth());
                const double fScaleFactor(0L != nFontWidth ? 1.0 / (double)nFontWidth : 1.0);
                
                for(xub_StrLen a(0); a < mnTextLength; a++)
                {
                    maDblDXArray.push_back((double)rInfo.mpDXArray[a] * fScaleFactor);
                }
            }
        }

        // for ::std::sort
        bool operator<(const impPathTextPortion& rComp) const
        {
            if(mnParagraph < rComp.mnParagraph)
            {
                return true;
            }

            if(maOffset.getX() < rComp.maOffset.getX())
            {
                return true;
            }

            return (maOffset.getY() < rComp.maOffset.getY());
        }

        const basegfx::B2DVector& getOffset() const { return maOffset; }
        const String& getText() const { return maText; }
        xub_StrLen getTextStart() const { return mnTextStart; }
        xub_StrLen getTextLength() const { return mnTextLength; }
        sal_uInt16 getParagraph() const { return mnParagraph; }
        xub_StrLen getIndex() const { return mnIndex; }
        const SvxFont& getFont() const { return maFont; }
        bool isRTL() const { return mbRTL; }
        const ::std::vector< double >& getDoubleDXArray() const { return maDblDXArray; }
        const ::com::sun::star::lang::Locale& getLocale() const { return maLocale; }

        xub_StrLen getPortionIndex(xub_StrLen nIndex, xub_StrLen nLength) const
        {
            if(mbRTL)
            {
                return (mnTextStart + (mnTextLength - (nIndex + nLength)));
            }
            else
            {
                return (mnTextStart + nIndex);
            }
        }

        double getDisplayLength(xub_StrLen nIndex, xub_StrLen nLength) const
        {
            drawinglayer::primitive2d::TextLayouterDevice aTextLayouter;
            double fRetval(0.0);

            if(maFont.IsVertical())
            {
                fRetval = aTextLayouter.getTextHeight() * (double)nLength;
            }
            else
            {
                fRetval = aTextLayouter.getTextWidth(maText, getPortionIndex(nIndex, nLength), nLength);
            }

            return fRetval;
        }
    };
} // end of anonymous namespace

//////////////////////////////////////////////////////////////////////////////
// TextBreakup helper

namespace
{
    class impTextBreakupHandler
    {
        SdrOutliner&								mrOutliner;
        ::std::vector< impPathTextPortion >			maPathTextPortions;

        DECL_LINK(decompositionPathTextPrimitive, DrawPortionInfo* );

    public:
        impTextBreakupHandler(SdrOutliner& rOutliner)
        :	mrOutliner(rOutliner)
        {
        }

        const ::std::vector< impPathTextPortion >& decompositionPathTextPrimitive()
        {
            // strip portions to maPathTextPortions
            mrOutliner.SetDrawPortionHdl(LINK(this, impTextBreakupHandler, decompositionPathTextPrimitive));
            mrOutliner.StripPortions();
            
            if(maPathTextPortions.size())
            {
                // sort portions by paragraph, x and y
                ::std::sort(maPathTextPortions.begin(), maPathTextPortions.end());
            }

            return maPathTextPortions;
        }
    };

    IMPL_LINK(impTextBreakupHandler, decompositionPathTextPrimitive, DrawPortionInfo*, pInfo)
    {
        maPathTextPortions.push_back(impPathTextPortion(*pInfo));
        return 0;
    }
} // end of anonymous namespace

//////////////////////////////////////////////////////////////////////////////
// TextBreakup one poly and one paragraph helper

namespace
{
    class impPolygonParagraphHandler
    {
        const drawinglayer::attribute::SdrFormTextAttribute&        mrSdrFormTextAttribute;	// FormText parameters
        std::vector< drawinglayer::primitive2d::BasePrimitive2D* >&	mrDecomposition;		// destination primitive list
        std::vector< drawinglayer::primitive2d::BasePrimitive2D* >&	mrShadowDecomposition;	// destination primitive list for shadow
        Reference < com::sun::star::i18n::XBreakIterator >			mxBreak;				// break iterator

        double getParagraphTextLength(const ::std::vector< const impPathTextPortion* >& rTextPortions)
        {
            drawinglayer::primitive2d::TextLayouterDevice aTextLayouter;
            double fRetval(0.0);

            for(sal_uInt32 a(0L); a < rTextPortions.size(); a++)
            {
                const impPathTextPortion* pCandidate = rTextPortions[a];

                if(pCandidate && pCandidate->getTextLength())
                {
                    aTextLayouter.setFont(pCandidate->getFont());
                    fRetval += pCandidate->getDisplayLength(0L, pCandidate->getTextLength());
                }
            }

            return fRetval;
        }

        xub_StrLen getNextGlyphLen(const impPathTextPortion* pCandidate, xub_StrLen nPosition, const ::com::sun::star::lang::Locale& rFontLocale)
        {
            xub_StrLen nNextGlyphLen(1);

            if(mxBreak.is())
            {
                sal_Int32 nDone(0L);
                nNextGlyphLen = (xub_StrLen)mxBreak->nextCharacters(pCandidate->getText(), nPosition, 
                    rFontLocale, CharacterIteratorMode::SKIPCELL, 1, nDone) - nPosition;
            }

            return nNextGlyphLen;
        }

    public:
        impPolygonParagraphHandler(
            const drawinglayer::attribute::SdrFormTextAttribute& rSdrFormTextAttribute, 
            std::vector< drawinglayer::primitive2d::BasePrimitive2D* >& rDecomposition, 
            std::vector< drawinglayer::primitive2d::BasePrimitive2D* >& rShadowDecomposition)
        :	mrSdrFormTextAttribute(rSdrFormTextAttribute),
            mrDecomposition(rDecomposition),
            mrShadowDecomposition(rShadowDecomposition)
        {
            // prepare BreakIterator
            Reference < XMultiServiceFactory > xMSF = ::comphelper::getProcessServiceFactory();
            Reference < XInterface > xInterface = xMSF->createInstance(::rtl::OUString::createFromAscii("com.sun.star.i18n.BreakIterator"));
            
            if(xInterface.is())
            {
                Any x = xInterface->queryInterface(::getCppuType((const Reference< XBreakIterator >*)0));
                x >>= mxBreak;
            }
        }

        void HandlePair(const basegfx::B2DPolygon rPolygonCandidate, const ::std::vector< const impPathTextPortion* >& rTextPortions)
        {
            // prepare polygon geometry, take into account as many parameters as possible
            basegfx::B2DPolygon aPolygonCandidate(rPolygonCandidate);
            const double fPolyLength(basegfx::tools::getLength(aPolygonCandidate));
            double fPolyEnd(fPolyLength);
            double fPolyStart(0.0);
            double fScaleFactor(1.0);

            if(mrSdrFormTextAttribute.getFormTextMirror())
            {
                aPolygonCandidate.flip();
            }

            if(mrSdrFormTextAttribute.getFormTextStart() 
                && (XFT_LEFT == mrSdrFormTextAttribute.getFormTextAdjust() 
                    || XFT_RIGHT == mrSdrFormTextAttribute.getFormTextAdjust()))
            {
                if(XFT_LEFT == mrSdrFormTextAttribute.getFormTextAdjust())
                {
                    fPolyStart += mrSdrFormTextAttribute.getFormTextStart();

                    if(fPolyStart > fPolyEnd)
                    {
                        fPolyStart = fPolyEnd;
                    }
                }
                else
                {
                    fPolyEnd -= mrSdrFormTextAttribute.getFormTextStart();

                    if(fPolyEnd < fPolyStart)
                    {
                        fPolyEnd = fPolyStart;
                    }
                }
            }

            if(XFT_LEFT != mrSdrFormTextAttribute.getFormTextAdjust())
            {
                // calculate total text length of this paragraph, some layout needs to be done
                const double fParagraphTextLength(getParagraphTextLength(rTextPortions));

                // check if text is too long for paragraph. If yes, handle as if left aligned (default),
                // but still take care of XFT_AUTOSIZE in that case
                const bool bTextTooLong(fParagraphTextLength > (fPolyEnd - fPolyStart));

                if(XFT_RIGHT == mrSdrFormTextAttribute.getFormTextAdjust())
                {
                    if(!bTextTooLong)
                    {
                        // if right aligned, add difference to polygon start
                        fPolyStart += ((fPolyEnd - fPolyStart) - fParagraphTextLength);
                    }
                }
                else if(XFT_CENTER == mrSdrFormTextAttribute.getFormTextAdjust())
                {
                    if(!bTextTooLong)
                    {
                        // if centered, add half of difference to polygon start
                        fPolyStart += ((fPolyEnd - fPolyStart) - fParagraphTextLength) / 2.0;
                    }
                }
                else if(XFT_AUTOSIZE == mrSdrFormTextAttribute.getFormTextAdjust())
                {
                    // if scale, prepare scale factor between curve length and text length
                    if(0.0 != fParagraphTextLength)
                    {
                        fScaleFactor = (fPolyEnd - fPolyStart) / fParagraphTextLength;
                    }
                }
            }

            // handle text portions for this paragraph
            for(sal_uInt32 a(0L); a < rTextPortions.size() && fPolyStart < fPolyEnd; a++)
            {
                const impPathTextPortion* pCandidate = rTextPortions[a];
                basegfx::B2DVector aSize;
                const drawinglayer::primitive2d::FontAttributes aCandidateFontAttributes(drawinglayer::primitive2d::getFontAttributesFromVclFont(
                    aSize, 
                    pCandidate->getFont(),
                    pCandidate->isRTL(),
                    false));

                if(pCandidate && pCandidate->getTextLength())
                {
                    drawinglayer::primitive2d::TextLayouterDevice aTextLayouter;
                    aTextLayouter.setFont(pCandidate->getFont());
                    xub_StrLen nUsedTextLength(0);

                    while(nUsedTextLength < pCandidate->getTextLength() && fPolyStart < fPolyEnd)
                    {
                        xub_StrLen nNextGlyphLen(getNextGlyphLen(pCandidate, pCandidate->getTextStart() + nUsedTextLength, pCandidate->getLocale()));

                        // prepare portion length. Takes RTL sections into account.
                        double fPortionLength(pCandidate->getDisplayLength(nUsedTextLength, nNextGlyphLen));

                        if(XFT_AUTOSIZE == mrSdrFormTextAttribute.getFormTextAdjust())
                        {
                            // when scaling, expand portion length
                            fPortionLength *= fScaleFactor;
                        }

                        // create transformation
                        basegfx::B2DHomMatrix aNewTransformA, aNewTransformB, aNewShadowTransform;
                        basegfx::B2DPoint aStartPos(basegfx::tools::getPositionAbsolute(aPolygonCandidate, fPolyStart, fPolyLength));
                        basegfx::B2DPoint aEndPos(aStartPos);

                        // add font scaling
                        aNewTransformA.scale(aSize.getX(), aSize.getY());

                        // prepare scaling of text primitive
                        if(XFT_AUTOSIZE == mrSdrFormTextAttribute.getFormTextAdjust())
                        {
                            // when scaling, expand text primitive scaling
                            aNewTransformA.scale(fScaleFactor, fScaleFactor);
                        }

                        // eventually create shadow primitives from aDecomposition and add to rDecomposition
                        const bool bShadow(XFTSHADOW_NONE != mrSdrFormTextAttribute.getFormTextShadow());

                        if(bShadow)
                        {
                            if(XFTSHADOW_NORMAL == mrSdrFormTextAttribute.getFormTextShadow())
                            {
                                aNewShadowTransform.translate(
                                    mrSdrFormTextAttribute.getFormTextShdwXVal(), 
                                    -mrSdrFormTextAttribute.getFormTextShdwYVal());
                            }
                            else // XFTSHADOW_SLANT
                            {
                                double fScaleValue(mrSdrFormTextAttribute.getFormTextShdwYVal() / 100.0);
                                double fShearValue(-mrSdrFormTextAttribute.getFormTextShdwXVal() * F_PI1800);
                                
                                aNewShadowTransform.scale(1.0, fScaleValue);
                                aNewShadowTransform.shearX(sin(fShearValue));
                                aNewShadowTransform.scale(1.0, cos(fShearValue));
                            }
                        }

                        switch(mrSdrFormTextAttribute.getFormTextStyle())
                        {
                            case XFT_ROTATE :
                            {
                                aEndPos = basegfx::tools::getPositionAbsolute(aPolygonCandidate, fPolyStart + fPortionLength, fPolyLength);
                                const basegfx::B2DVector aDirection(aEndPos - aStartPos);
                                aNewTransformB.rotate(atan2(aDirection.getY(), aDirection.getX()));
                                aNewTransformB.translate(aStartPos.getX(), aStartPos.getY());
                                
                                break;
                            }
                            case XFT_UPRIGHT :
                            {
                                aNewTransformB.translate(aStartPos.getX() - (fPortionLength / 2.0), aStartPos.getY());
                                
                                break;
                            }
                            case XFT_SLANTX :
                            {
                                aEndPos = basegfx::tools::getPositionAbsolute(aPolygonCandidate, fPolyStart + fPortionLength, fPolyLength);
                                const basegfx::B2DVector aDirection(aEndPos - aStartPos);
                                const double fShearValue(atan2(aDirection.getY(), aDirection.getX()));
                                const double fSin(sin(fShearValue));
                                const double fCos(cos(fShearValue));

                                   aNewTransformB.shearX(-fSin);

                                // Scale may lead to objects without height since fCos == 0.0 is possible.
                                // Renderers need to handle that, it's not a forbidden value and does not
                                // need to be avoided
                                aNewTransformB.scale(1.0, fCos);
                                aNewTransformB.translate(aStartPos.getX() - (fPortionLength / 2.0), aStartPos.getY());
                                
                                break;
                            }
                            case XFT_SLANTY :
                            {
                                aEndPos = basegfx::tools::getPositionAbsolute(aPolygonCandidate, fPolyStart + fPortionLength, fPolyLength);
                                const basegfx::B2DVector aDirection(aEndPos - aStartPos);
                                const double fShearValue(atan2(aDirection.getY(), aDirection.getX()));
                                const double fCos(cos(fShearValue));
                                const double fTan(tan(fShearValue));
                                
                                // shear to 'stand' on the curve
                                aNewTransformB.shearY(fTan);

                                // scale in X to make as tight as needed. As with XFT_SLANT_X, this may
                                // lead to primitives without width which the renderers will handle
                                   aNewTransformA.scale(fCos, 1.0);

                                aNewTransformB.translate(aStartPos.getX(), aStartPos.getY());
                                
                                break;
                            }
                            default : break; // XFT_NONE
                        }

                        // distance from path?
                        if(mrSdrFormTextAttribute.getFormTextDistance())
                        {
                            if(aEndPos.equal(aStartPos))
                            {
                                aEndPos = basegfx::tools::getPositionAbsolute(aPolygonCandidate, fPolyStart + fPortionLength, fPolyLength);
                            }

                            // use back vector (aStartPos - aEndPos) here to get mirrored perpendicular as in old stuff
                            const basegfx::B2DVector aPerpendicular(
                                basegfx::getNormalizedPerpendicular(aStartPos - aEndPos) * 
                                mrSdrFormTextAttribute.getFormTextDistance());
                            aNewTransformB.translate(aPerpendicular.getX(), aPerpendicular.getY());
                        }

                        // shadow primitive creation
                        if(bShadow)
                        {
                            if(pCandidate->getText().Len() && nNextGlyphLen)
                            {
                                const Color aShadowColor(mrSdrFormTextAttribute.getFormTextShdwColor());
                                const basegfx::BColor aRGBShadowColor(aShadowColor.getBColor());
                                const xub_StrLen nPortionIndex(pCandidate->getPortionIndex(nUsedTextLength, nNextGlyphLen));
                                const ::std::vector< double > aNewDXArray(
                                    pCandidate->getDoubleDXArray().begin() + nPortionIndex,
                                    pCandidate->getDoubleDXArray().begin() + nPortionIndex + nNextGlyphLen);

                                drawinglayer::primitive2d::TextSimplePortionPrimitive2D* pNew = new drawinglayer::primitive2d::TextSimplePortionPrimitive2D(
                                    aNewTransformB * aNewShadowTransform * aNewTransformA, 
                                    pCandidate->getText(), 
                                    nPortionIndex, 
                                    nNextGlyphLen,
                                    aNewDXArray, 
                                    aCandidateFontAttributes, 
                                    pCandidate->getLocale(),
                                    aRGBShadowColor);
                                
                                mrShadowDecomposition.push_back(pNew);
                            }
                        }

                        // primitive creation
                        if(pCandidate->getText().Len() && nNextGlyphLen)
                        {
                            const Color aColor(pCandidate->getFont().GetColor());
                            const basegfx::BColor aRGBColor(aColor.getBColor());
                            const xub_StrLen nPortionIndex(pCandidate->getPortionIndex(nUsedTextLength, nNextGlyphLen));
                            const ::std::vector< double > aNewDXArray(
                                pCandidate->getDoubleDXArray().begin() + nPortionIndex,
                                pCandidate->getDoubleDXArray().begin() + nPortionIndex + nNextGlyphLen);

                            drawinglayer::primitive2d::TextSimplePortionPrimitive2D* pNew = new drawinglayer::primitive2d::TextSimplePortionPrimitive2D(
                                aNewTransformB * aNewTransformA, 
                                pCandidate->getText(), 
                                nPortionIndex, 
                                nNextGlyphLen, 
                                aNewDXArray, 
                                aCandidateFontAttributes, 
                                pCandidate->getLocale(),
                                aRGBColor);
                            
                            mrDecomposition.push_back(pNew);
                        }

                        // consume from portion // no += here, xub_StrLen is USHORT and the compiler will gererate a warning here
                        nUsedTextLength = nUsedTextLength + nNextGlyphLen;

                        // consume from polygon
                        fPolyStart += fPortionLength;
                    }
                }
            }
        }
    };
} // end of anonymous namespace

//////////////////////////////////////////////////////////////////////////////
// primitive decomposition helpers

namespace
{
    void impAddPolygonStrokePrimitives(
        const basegfx::B2DPolyPolygonVector& rB2DPolyPolyVector, 
        const basegfx::B2DHomMatrix& rTransform, 
        const drawinglayer::attribute::LineAttribute& rLineAttribute, 
        const drawinglayer::attribute::StrokeAttribute& rStrokeAttribute, 
        std::vector< drawinglayer::primitive2d::BasePrimitive2D* >& rTarget)
    {
        for(basegfx::B2DPolyPolygonVector::const_iterator aPolygon(rB2DPolyPolyVector.begin()); aPolygon != rB2DPolyPolyVector.end(); aPolygon++)
        {
            // prepare PolyPolygons
            basegfx::B2DPolyPolygon aB2DPolyPolygon = *aPolygon;
            aB2DPolyPolygon.transform(rTransform);
            
            for(sal_uInt32 a(0L); a < aB2DPolyPolygon.count(); a++)
            {
                // create one primitive per polygon
                drawinglayer::primitive2d::PolygonStrokePrimitive2D* pNew = 
                    new drawinglayer::primitive2d::PolygonStrokePrimitive2D(
                        aB2DPolyPolygon.getB2DPolygon(a), rLineAttribute, rStrokeAttribute);
                rTarget.push_back(pNew);
            }
        }
    }

    drawinglayer::primitive2d::Primitive2DSequence impAddPathTextOutlines(
        const std::vector< drawinglayer::primitive2d::BasePrimitive2D* >& rSource, 
        const drawinglayer::attribute::SdrFormTextOutlineAttribute& rOutlineAttribute)
    {
        std::vector< drawinglayer::primitive2d::BasePrimitive2D* > aNewPrimitives;
        
        for(sal_uInt32 a(0L); a < rSource.size(); a++)
        {
            const drawinglayer::primitive2d::TextSimplePortionPrimitive2D* pTextCandidate = dynamic_cast< const drawinglayer::primitive2d::TextSimplePortionPrimitive2D* >(rSource[a]);

            if(pTextCandidate)
            {
                basegfx::B2DPolyPolygonVector aB2DPolyPolyVector;
                basegfx::B2DHomMatrix aPolygonTransform;

                // get text outlines and their object transformation
                pTextCandidate->getTextOutlinesAndTransformation(aB2DPolyPolyVector, aPolygonTransform);

                if(aB2DPolyPolyVector.size())
                {
                    // create stroke primitives
                    std::vector< drawinglayer::primitive2d::BasePrimitive2D* > aStrokePrimitives;
                    impAddPolygonStrokePrimitives(
                        aB2DPolyPolyVector, 
                        aPolygonTransform, 
                        rOutlineAttribute.getLineAttribute(), 
                        rOutlineAttribute.getStrokeAttribute(), 
                        aStrokePrimitives);
                    const sal_uInt32 nStrokeCount(aStrokePrimitives.size());

                    if(nStrokeCount)
                    {
                        if(rOutlineAttribute.getTransparence())
                        {
                            // create UnifiedAlphaPrimitive2D
                            drawinglayer::primitive2d::Primitive2DSequence aStrokePrimitiveSequence(nStrokeCount);

                            for(sal_uInt32 b(0L); b < nStrokeCount; b++)
                            {
                                aStrokePrimitiveSequence[b] = drawinglayer::primitive2d::Primitive2DReference(aStrokePrimitives[b]);
                            }

                            drawinglayer::primitive2d::UnifiedAlphaPrimitive2D* pNew2 = 
                                new drawinglayer::primitive2d::UnifiedAlphaPrimitive2D(
                                    aStrokePrimitiveSequence, 
                                    (double)rOutlineAttribute.getTransparence() / 100.0);
                            aNewPrimitives.push_back(pNew2);
                        }
                        else
                        {
                            // add polygons to rDecomposition as polygonStrokePrimitives
                            aNewPrimitives.insert(aNewPrimitives.end(), aStrokePrimitives.begin(), aStrokePrimitives.end());
                        }
                    }
                }
            }
        }

        const sal_uInt32 nNewCount(aNewPrimitives.size());

        if(nNewCount)
        {
            drawinglayer::primitive2d::Primitive2DSequence aRetval(nNewCount);

            for(sal_uInt32 a(0L); a < nNewCount; a++)
            {
                aRetval[a] = drawinglayer::primitive2d::Primitive2DReference(aNewPrimitives[a]);
            }

            return aRetval;
        }
        else
        {
            return drawinglayer::primitive2d::Primitive2DSequence();
        }
    }
} // end of anonymous namespace

//////////////////////////////////////////////////////////////////////////////
// primitive decomposition

bool SdrTextObj::impDecomposePathTextPrimitive(
    drawinglayer::primitive2d::Primitive2DSequence& rTarget, 
    const drawinglayer::primitive2d::SdrPathTextPrimitive2D& rSdrPathTextPrimitive,
    const drawinglayer::geometry::ViewInformation2D& aViewInformation) const
{
    drawinglayer::primitive2d::Primitive2DSequence aRetvalA;
    drawinglayer::primitive2d::Primitive2DSequence aRetvalB;

    // prepare outliner
    SdrOutliner& rOutliner = ImpGetDrawOutliner();
    rOutliner.SetUpdateMode(true);
    rOutliner.Clear();
    rOutliner.SetPaperSize(Size(LONG_MAX,LONG_MAX));
    rOutliner.SetText(rSdrPathTextPrimitive.getOutlinerParaObject());

    // set visualizing page at Outliner; needed e.g. for PageNumberField decomposition
    rOutliner.setVisualizedPage(GetSdrPageFromXDrawPage(aViewInformation.getVisualizedPage()));

    // now break up to text portions
    impTextBreakupHandler aConverter(rOutliner);
    const ::std::vector< impPathTextPortion > rPathTextPortions = aConverter.decompositionPathTextPrimitive();

    if(rPathTextPortions.size())
    {
        // get FormText and polygon values
        const drawinglayer::attribute::SdrFormTextAttribute& rFormTextAttribute = rSdrPathTextPrimitive.getSdrFormTextAttribute();
        const basegfx::B2DPolyPolygon& rPathPolyPolygon(rSdrPathTextPrimitive.getPathPolyPolygon());

        // get loop count
        sal_uInt32 nLoopCount(rPathPolyPolygon.count());

        if(rOutliner.GetParagraphCount() < nLoopCount)
        {
            nLoopCount = rOutliner.GetParagraphCount();
        }

        if(nLoopCount)
        {
            // prepare common decomposition stuff
            std::vector< drawinglayer::primitive2d::BasePrimitive2D* > aRegularDecomposition;
            std::vector< drawinglayer::primitive2d::BasePrimitive2D* > aShadowDecomposition;
            impPolygonParagraphHandler aPolygonParagraphHandler(
                rFormTextAttribute, aRegularDecomposition, aShadowDecomposition);
            sal_uInt32 a;

            for(a = 0L; a < nLoopCount; a++)
            {
                // filter text portions for this paragraph
                ::std::vector< const impPathTextPortion* > aParagraphTextPortions;

                for(sal_uInt32 b(0L); b < rPathTextPortions.size(); b++)
                {
                    const impPathTextPortion& rCandidate = rPathTextPortions[b];

                    if(rCandidate.getParagraph() == a)
                    {
                        aParagraphTextPortions.push_back(&rCandidate);
                    }
                }

                // handle data pair polygon/ParagraphTextPortions
                if(aParagraphTextPortions.size())
                {
                    aPolygonParagraphHandler.HandlePair(rPathPolyPolygon.getB2DPolygon(a), aParagraphTextPortions);
                }
            }

            const sal_uInt32 nShadowCount(aShadowDecomposition.size());
            const sal_uInt32 nRegularCount(aRegularDecomposition.size());
            
            if(nShadowCount)
            {
                // add shadow primitives to decomposition
                aRetvalA.realloc(nShadowCount);

                for(a = 0L; a < nShadowCount; a++)
                {
                    aRetvalA[a] = drawinglayer::primitive2d::Primitive2DReference(aShadowDecomposition[a]);
                }

                // evtl. add shadow outlines
                if(rFormTextAttribute.getFormTextOutline() && rFormTextAttribute.getShadowOutline())
                {
                    const drawinglayer::primitive2d::Primitive2DSequence aOutlines(
                        impAddPathTextOutlines(aShadowDecomposition, *rFormTextAttribute.getShadowOutline()));
                    drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(aRetvalA, aOutlines);
                }
            }

            if(nRegularCount)
            {
                // add normal primitives to decomposition
                aRetvalB.realloc(nRegularCount);

                for(a = 0L; a < nRegularCount; a++)
                {
                    aRetvalB[a] = drawinglayer::primitive2d::Primitive2DReference(aRegularDecomposition[a]);
                }

                // evtl. add outlines
                if(rFormTextAttribute.getFormTextOutline() && rFormTextAttribute.getOutline())
                {
                    const drawinglayer::primitive2d::Primitive2DSequence aOutlines(
                        impAddPathTextOutlines(aRegularDecomposition, *rFormTextAttribute.getOutline()));
                    drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(aRetvalB, aOutlines);
                }
            }
        }
    }

    // cleanup outliner
    rOutliner.SetDrawPortionHdl(Link());
    rOutliner.Clear();
    rOutliner.setVisualizedPage(0);

    // concatenate all results
    drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aRetvalA);
    drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aRetvalB);

    return false;
}

//////////////////////////////////////////////////////////////////////////////
// eof