Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1362 insertions, 0 deletions

diff --git a/vcl/source/gdi/regionband.cxx b/vcl/source/gdi/regionband.cxx
new file mode 100644
index 000000000..e772d5b27
--- /dev/null
+++ b/vcl/source/gdi/regionband.cxx
@@ -0,0 +1,1362 @@
+/* -*- 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 <sal/config.h>
+
+#include <cstdlib>
+
+#include <tools/stream.hxx>
+#include <regionband.hxx>
+#include <osl/diagnose.h>
+#include <sal/log.hxx>
+
+RegionBand::RegionBand()
+:   mpFirstBand(nullptr),
+    mpLastCheckedBand(nullptr)
+{
+}
+
+RegionBand::RegionBand(const RegionBand& rRef)
+:   mpFirstBand(nullptr),
+    mpLastCheckedBand(nullptr)
+{
+    *this = rRef;
+}
+
+RegionBand& RegionBand::operator=(const RegionBand& rRef)
+{
+    if (this != &rRef)
+    {
+        ImplRegionBand* pPrevBand = nullptr;
+        ImplRegionBand* pBand = rRef.mpFirstBand;
+
+        while(pBand)
+        {
+            ImplRegionBand* pNewBand = new ImplRegionBand(*pBand);
+
+            // first element? -> set as first into the list
+            if(pBand == rRef.mpFirstBand)
+            {
+                mpFirstBand = pNewBand;
+            }
+            else
+            {
+                pPrevBand->mpNextBand = pNewBand;
+            }
+
+            pPrevBand = pNewBand;
+            pBand = pBand->mpNextBand;
+        }
+    }
+    return *this;
+}
+
+RegionBand::RegionBand(const tools::Rectangle& rRect)
+:   mpFirstBand(nullptr),
+    mpLastCheckedBand(nullptr)
+{
+    const tools::Long nTop(std::min(rRect.Top(), rRect.Bottom()));
+    const tools::Long nBottom(std::max(rRect.Top(), rRect.Bottom()));
+    const tools::Long nLeft(std::min(rRect.Left(), rRect.Right()));
+    const tools::Long nRight(std::max(rRect.Left(), rRect.Right()));
+
+    // add band with boundaries of the rectangle
+    mpFirstBand = new ImplRegionBand(nTop, nBottom);
+
+    // Set left and right boundaries of the band
+    mpFirstBand->Union(nLeft, nRight);
+
+}
+
+void RegionBand::implReset()
+{
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        ImplRegionBand* pTempBand = pBand->mpNextBand;
+        delete pBand;
+        pBand = pTempBand;
+    }
+
+    mpLastCheckedBand = nullptr;
+    mpFirstBand = nullptr;
+}
+
+RegionBand::~RegionBand()
+{
+    implReset();
+}
+
+bool RegionBand::operator==( const RegionBand& rRegionBand ) const
+{
+
+    // initialise pointers
+    ImplRegionBand*      pOwnRectBand = mpFirstBand;
+    ImplRegionBandSep*   pOwnRectBandSep = pOwnRectBand->mpFirstSep;
+    ImplRegionBand*      pSecondRectBand = rRegionBand.mpFirstBand;
+    ImplRegionBandSep*   pSecondRectBandSep = pSecondRectBand->mpFirstSep;
+
+    while ( pOwnRectBandSep && pSecondRectBandSep )
+    {
+        // get boundaries of current rectangle
+        tools::Long nOwnXLeft = pOwnRectBandSep->mnXLeft;
+        tools::Long nSecondXLeft = pSecondRectBandSep->mnXLeft;
+
+        if ( nOwnXLeft != nSecondXLeft )
+        {
+            return false;
+        }
+
+        tools::Long nOwnYTop = pOwnRectBand->mnYTop;
+        tools::Long nSecondYTop = pSecondRectBand->mnYTop;
+
+        if ( nOwnYTop != nSecondYTop )
+        {
+            return false;
+        }
+
+        tools::Long nOwnXRight = pOwnRectBandSep->mnXRight;
+        tools::Long nSecondXRight = pSecondRectBandSep->mnXRight;
+
+        if ( nOwnXRight != nSecondXRight )
+        {
+            return false;
+        }
+
+        tools::Long nOwnYBottom = pOwnRectBand->mnYBottom;
+        tools::Long nSecondYBottom = pSecondRectBand->mnYBottom;
+
+        if ( nOwnYBottom != nSecondYBottom )
+        {
+            return false;
+        }
+
+        // get next separation from current band
+        pOwnRectBandSep = pOwnRectBandSep->mpNextSep;
+
+        // no separation found? -> go to next band!
+        if ( !pOwnRectBandSep )
+        {
+            // get next band
+            pOwnRectBand = pOwnRectBand->mpNextBand;
+
+            // get first separation in current band
+            if( pOwnRectBand )
+            {
+                pOwnRectBandSep = pOwnRectBand->mpFirstSep;
+            }
+        }
+
+        // get next separation from current band
+        pSecondRectBandSep = pSecondRectBandSep->mpNextSep;
+
+        // no separation found? -> go to next band!
+        if ( !pSecondRectBandSep )
+        {
+            // get next band
+            pSecondRectBand = pSecondRectBand->mpNextBand;
+
+            // get first separation in current band
+            if( pSecondRectBand )
+            {
+                pSecondRectBandSep = pSecondRectBand->mpFirstSep;
+            }
+        }
+
+        if ( pOwnRectBandSep && !pSecondRectBandSep )
+        {
+            return false;
+        }
+
+        if ( !pOwnRectBandSep && pSecondRectBandSep )
+        {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+namespace {
+
+enum StreamEntryType { STREAMENTRY_BANDHEADER, STREAMENTRY_SEPARATION, STREAMENTRY_END };
+
+}
+
+bool RegionBand::load(SvStream& rIStrm)
+{
+    // clear this instance data
+    implReset();
+
+    // get all bands
+    ImplRegionBand* pCurrBand = nullptr;
+
+    // get header from first element
+    sal_uInt16 nTmp16(STREAMENTRY_END);
+    rIStrm.ReadUInt16(nTmp16);
+
+    if (STREAMENTRY_END == static_cast<StreamEntryType>(nTmp16))
+        return false;
+
+    size_t nRecordsPossible = rIStrm.remainingSize() / (2*sizeof(sal_Int32));
+    if (!nRecordsPossible)
+    {
+        OSL_ENSURE(false, "premature end of region stream" );
+        implReset();
+        return false;
+    }
+
+    do
+    {
+        // insert new band or new separation?
+        if(STREAMENTRY_BANDHEADER == static_cast<StreamEntryType>(nTmp16))
+        {
+            sal_Int32 nYTop(0);
+            sal_Int32 nYBottom(0);
+
+            rIStrm.ReadInt32( nYTop );
+            rIStrm.ReadInt32( nYBottom );
+
+            // create band
+            ImplRegionBand* pNewBand = new ImplRegionBand( nYTop, nYBottom );
+
+            // first element? -> set as first into the list
+            if ( !pCurrBand )
+            {
+                mpFirstBand = pNewBand;
+            }
+            else
+            {
+                pCurrBand->mpNextBand = pNewBand;
+            }
+
+            // save pointer for next creation
+            pCurrBand = pNewBand;
+        }
+        else
+        {
+            sal_Int32 nXLeft(0);
+            sal_Int32 nXRight(0);
+
+            rIStrm.ReadInt32( nXLeft );
+            rIStrm.ReadInt32( nXRight );
+
+            // add separation
+            if ( pCurrBand )
+            {
+                pCurrBand->Union( nXLeft, nXRight );
+            }
+        }
+
+        if( rIStrm.eof() )
+        {
+            OSL_ENSURE(false, "premature end of region stream" );
+            implReset();
+            return false;
+        }
+
+        // get next header
+        rIStrm.ReadUInt16( nTmp16 );
+    }
+    while (STREAMENTRY_END != static_cast<StreamEntryType>(nTmp16) && rIStrm.good());
+    if (!CheckConsistency())
+    {
+        implReset();
+        return false;
+    }
+    return true;
+}
+
+void RegionBand::save(SvStream& rOStrm) const
+{
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        // put boundaries
+        rOStrm.WriteUInt16( STREAMENTRY_BANDHEADER );
+        rOStrm.WriteInt32( pBand->mnYTop );
+        rOStrm.WriteInt32( pBand->mnYBottom );
+
+        // put separations of current band
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while(pSep)
+        {
+            // put separation
+            rOStrm.WriteUInt16( STREAMENTRY_SEPARATION );
+            rOStrm.WriteInt32( pSep->mnXLeft );
+            rOStrm.WriteInt32( pSep->mnXRight );
+
+            // next separation from current band
+            pSep = pSep->mpNextSep;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+    // put endmarker
+    rOStrm.WriteUInt16( STREAMENTRY_END );
+}
+
+bool RegionBand::isSingleRectangle() const
+{
+    // just one band?
+    if(mpFirstBand && !mpFirstBand->mpNextBand)
+    {
+        // just one sep?
+        if(mpFirstBand->mpFirstSep && !mpFirstBand->mpFirstSep->mpNextSep)
+        {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+void RegionBand::InsertBand(ImplRegionBand* pPreviousBand, ImplRegionBand* pBandToInsert)
+{
+    OSL_ASSERT(pBandToInsert!=nullptr);
+
+    if(!pPreviousBand)
+    {
+        // Insert band before all others.
+        if(mpFirstBand)
+        {
+            mpFirstBand->mpPrevBand = pBandToInsert;
+        }
+
+        pBandToInsert->mpNextBand = mpFirstBand;
+        mpFirstBand = pBandToInsert;
+    }
+    else
+    {
+        // Insert band directly after pPreviousBand.
+        pBandToInsert->mpNextBand = pPreviousBand->mpNextBand;
+        pPreviousBand->mpNextBand = pBandToInsert;
+        pBandToInsert->mpPrevBand = pPreviousBand;
+    }
+
+}
+
+void RegionBand::processPoints()
+{
+    ImplRegionBand* pRegionBand = mpFirstBand;
+
+    while(pRegionBand)
+    {
+        // generate separations from the lines and process union
+        pRegionBand->ProcessPoints();
+        pRegionBand = pRegionBand->mpNextBand;
+    }
+
+}
+
+/** This function is similar to the RegionBand::InsertBands() method.
+    It creates a minimal set of missing bands so that the entire vertical
+    interval from nTop to nBottom is covered by bands.
+*/
+void RegionBand::ImplAddMissingBands(const tools::Long nTop, const tools::Long nBottom)
+{
+    // Iterate over already existing bands and add missing bands atop the
+    // first and between two bands.
+    ImplRegionBand* pPreviousBand = nullptr;
+    ImplRegionBand* pBand = ImplGetFirstRegionBand();
+    tools::Long nCurrentTop (nTop);
+
+    while (pBand != nullptr && nCurrentTop<nBottom)
+    {
+        if (nCurrentTop < pBand->mnYTop)
+        {
+            // Create new band above the current band.
+            ImplRegionBand* pAboveBand = new ImplRegionBand(
+                nCurrentTop,
+                ::std::min(nBottom,pBand->mnYTop-1));
+            InsertBand(pPreviousBand, pAboveBand);
+        }
+
+        // Adapt the top of the interval to prevent overlapping bands.
+        nCurrentTop = ::std::max(nTop, pBand->mnYBottom+1);
+
+        // Advance to next band.
+        pPreviousBand = pBand;
+        pBand = pBand->mpNextBand;
+    }
+
+    // We still have to cover two cases:
+    // 1. The region does not yet contain any bands.
+    // 2. The interval nTop->nBottom extends past the bottom most band.
+    if (nCurrentTop <= nBottom
+        && (pBand==nullptr || nBottom>pBand->mnYBottom))
+    {
+        // When there is no previous band then the new one will be the
+        // first.  Otherwise the new band is inserted behind the last band.
+        InsertBand(
+            pPreviousBand,
+            new ImplRegionBand(
+                nCurrentTop,
+                nBottom));
+    }
+
+}
+
+void RegionBand::CreateBandRange(tools::Long nYTop, tools::Long nYBottom)
+{
+    // add top band
+    mpFirstBand = new ImplRegionBand( nYTop-1, nYTop-1 );
+
+    // begin first search from the first element
+    mpLastCheckedBand = mpFirstBand;
+    ImplRegionBand* pBand = mpFirstBand;
+
+    for ( tools::Long i = nYTop; i <= nYBottom+1; i++ )
+    {
+        // create new band
+        ImplRegionBand* pNewBand = new ImplRegionBand( i, i );
+        pBand->mpNextBand = pNewBand;
+
+        if ( pBand != mpFirstBand )
+        {
+            pNewBand->mpPrevBand = pBand;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::InsertLine(const Point& rStartPt, const Point& rEndPt, tools::Long nLineId)
+{
+    tools::Long nX, nY;
+
+    // lines consisting of a single point do not interest here
+    if ( rStartPt == rEndPt )
+    {
+        return;
+    }
+
+    LineType eLineType = (rStartPt.Y() > rEndPt.Y()) ? LineType::Descending : LineType::Ascending;
+    if ( rStartPt.X() == rEndPt.X() )
+    {
+        // vertical line
+        const tools::Long nEndY = rEndPt.Y();
+
+        nX = rStartPt.X();
+        nY = rStartPt.Y();
+
+        if( nEndY > nY )
+        {
+            for ( ; nY <= nEndY; nY++ )
+            {
+                Point aNewPoint( nX, nY );
+                InsertPoint( aNewPoint, nLineId,
+                             (aNewPoint == rEndPt) || (aNewPoint == rStartPt),
+                             eLineType );
+            }
+        }
+        else
+        {
+            for ( ; nY >= nEndY; nY-- )
+            {
+                Point aNewPoint( nX, nY );
+                InsertPoint( aNewPoint, nLineId,
+                             (aNewPoint == rEndPt) || (aNewPoint == rStartPt),
+                             eLineType );
+            }
+        }
+    }
+    else if ( rStartPt.Y() != rEndPt.Y() )
+    {
+        const tools::Long  nDX = std::abs( rEndPt.X() - rStartPt.X() );
+        const tools::Long  nDY = std::abs( rEndPt.Y() - rStartPt.Y() );
+        const tools::Long  nStartX = rStartPt.X();
+        const tools::Long  nStartY = rStartPt.Y();
+        const tools::Long  nEndX = rEndPt.X();
+        const tools::Long  nEndY = rEndPt.Y();
+        const tools::Long  nXInc = ( nStartX < nEndX ) ? 1 : -1;
+        const tools::Long  nYInc = ( nStartY < nEndY ) ? 1 : -1;
+
+        if ( nDX >= nDY )
+        {
+            const tools::Long  nDYX = ( nDY - nDX ) * 2;
+            const tools::Long  nDY2 = nDY << 1;
+            tools::Long        nD = nDY2 - nDX;
+
+            for ( nX = nStartX, nY = nStartY; nX != nEndX; nX += nXInc )
+            {
+                InsertPoint( Point( nX, nY ), nLineId, nStartX == nX, eLineType );
+
+                if ( nD < 0 )
+                    nD += nDY2;
+                else
+                {
+                    nD += nDYX;
+                    nY += nYInc;
+                }
+            }
+        }
+        else
+        {
+            const tools::Long  nDYX = ( nDX - nDY ) * 2;
+            const tools::Long  nDY2 = nDX << 1;
+            tools::Long        nD = nDY2 - nDY;
+
+            for ( nX = nStartX, nY = nStartY; nY != nEndY; nY += nYInc )
+            {
+                InsertPoint( Point( nX, nY ), nLineId, nStartY == nY, eLineType );
+
+                if ( nD < 0 )
+                    nD += nDY2;
+                else
+                {
+                    nD += nDYX;
+                    nX += nXInc;
+                }
+            }
+        }
+
+        // last point
+        InsertPoint( Point( nEndX, nEndY ), nLineId, true, eLineType );
+    }
+}
+
+void RegionBand::InsertPoint(const Point &rPoint, tools::Long nLineID, bool bEndPoint, LineType eLineType)
+{
+    SAL_WARN_IF( mpFirstBand == nullptr, "vcl", "RegionBand::InsertPoint - no bands available!" );
+
+    if ( rPoint.Y() == mpLastCheckedBand->mnYTop )
+    {
+        mpLastCheckedBand->InsertPoint( rPoint.X(), nLineID, bEndPoint, eLineType );
+        return;
+    }
+
+    if ( rPoint.Y() > mpLastCheckedBand->mnYTop )
+    {
+        // Search ascending
+        while ( mpLastCheckedBand )
+        {
+            // Insert point if possible
+            if ( rPoint.Y() == mpLastCheckedBand->mnYTop )
+            {
+                mpLastCheckedBand->InsertPoint( rPoint.X(), nLineID, bEndPoint, eLineType );
+                return;
+            }
+
+            mpLastCheckedBand = mpLastCheckedBand->mpNextBand;
+        }
+
+        OSL_ENSURE(false, "RegionBand::InsertPoint reached the end of the list!" );
+    }
+    else
+    {
+        // Search descending
+        while ( mpLastCheckedBand )
+        {
+            // Insert point if possible
+            if ( rPoint.Y() == mpLastCheckedBand->mnYTop )
+            {
+                mpLastCheckedBand->InsertPoint( rPoint.X(), nLineID, bEndPoint, eLineType );
+                return;
+            }
+
+            mpLastCheckedBand = mpLastCheckedBand->mpPrevBand;
+        }
+
+        OSL_ENSURE(false, "RegionBand::InsertPoint reached the beginning of the list!" );
+    }
+
+    OSL_ENSURE(false, "RegionBand::InsertPoint point not inserted!" );
+
+    // reinitialize pointer (should never be reached!)
+    mpLastCheckedBand = mpFirstBand;
+}
+
+bool RegionBand::OptimizeBandList()
+{
+    ImplRegionBand* pPrevBand = nullptr;
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while ( pBand )
+    {
+        const bool bBTEqual = pBand->mpNextBand && (pBand->mnYBottom == pBand->mpNextBand->mnYTop);
+
+        // no separation? -> remove!
+        if ( pBand->IsEmpty() || (bBTEqual && (pBand->mnYBottom == pBand->mnYTop)) )
+        {
+            // save pointer
+            ImplRegionBand* pOldBand = pBand;
+
+            // previous element of the list
+            if ( pBand == mpFirstBand )
+                mpFirstBand = pBand->mpNextBand;
+            else
+                pPrevBand->mpNextBand = pBand->mpNextBand;
+
+            pBand = pBand->mpNextBand;
+            delete pOldBand;
+        }
+        else
+        {
+            // fixup
+            if ( bBTEqual )
+                pBand->mnYBottom = pBand->mpNextBand->mnYTop-1;
+
+            // this and next band with equal separations? -> combine!
+            if ( pBand->mpNextBand &&
+                 ((pBand->mnYBottom+1) == pBand->mpNextBand->mnYTop) &&
+                 (*pBand == *pBand->mpNextBand) )
+            {
+                // expand current height
+                pBand->mnYBottom = pBand->mpNextBand->mnYBottom;
+
+                // remove next band from list
+                ImplRegionBand* pDeletedBand = pBand->mpNextBand;
+                pBand->mpNextBand = pDeletedBand->mpNextBand;
+                delete pDeletedBand;
+
+                // check band again!
+            }
+            else
+            {
+                // count rectangles within band
+                ImplRegionBandSep* pSep = pBand->mpFirstSep;
+                while ( pSep )
+                {
+                    pSep = pSep->mpNextSep;
+                }
+
+                pPrevBand = pBand;
+                pBand = pBand->mpNextBand;
+            }
+        }
+    }
+
+#ifdef DBG_UTIL
+    pBand = mpFirstBand;
+    while ( pBand )
+    {
+        SAL_WARN_IF( pBand->mpFirstSep == nullptr, "vcl", "Exiting RegionBand::OptimizeBandList(): empty band in region!" );
+
+        if ( pBand->mnYBottom < pBand->mnYTop )
+            OSL_ENSURE(false, "RegionBand::OptimizeBandList(): YBottomBoundary < YTopBoundary" );
+
+        if ( pBand->mpNextBand && pBand->mnYBottom >= pBand->mpNextBand->mnYTop )
+            OSL_ENSURE(false, "RegionBand::OptimizeBandList(): overlapping bands in region!" );
+
+        pBand = pBand->mpNextBand;
+    }
+#endif
+
+    return (nullptr != mpFirstBand);
+}
+
+void RegionBand::Move(tools::Long nHorzMove, tools::Long nVertMove)
+{
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        // process the vertical move
+        if(nVertMove)
+        {
+            pBand->mnYTop = pBand->mnYTop + nVertMove;
+            pBand->mnYBottom = pBand->mnYBottom + nVertMove;
+        }
+
+        // process the horizontal move
+        if(nHorzMove)
+        {
+            pBand->MoveX(nHorzMove);
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::Scale(double fScaleX, double fScaleY)
+{
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        // process the vertical move
+        if(0.0 != fScaleY)
+        {
+            pBand->mnYTop = basegfx::fround(pBand->mnYTop * fScaleY);
+            pBand->mnYBottom = basegfx::fround(pBand->mnYBottom * fScaleY);
+        }
+
+        // process the horizontal move
+        if(0.0 != fScaleX)
+        {
+            pBand->ScaleX(fScaleX);
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::InsertBands(tools::Long nTop, tools::Long nBottom)
+{
+    // region empty? -> set rectangle as first entry!
+    if ( !mpFirstBand )
+    {
+        // add band with boundaries of the rectangle
+        mpFirstBand = new ImplRegionBand( nTop, nBottom );
+        return;
+    }
+
+    // find/insert bands for the boundaries of the rectangle
+    bool bTopBoundaryInserted = false;
+    bool bTop2BoundaryInserted = false;
+    bool bBottomBoundaryInserted = false;
+
+    // special case: top boundary is above the first band
+    ImplRegionBand* pNewBand;
+
+    if ( nTop < mpFirstBand->mnYTop )
+    {
+        // create new band above the first in the list
+        pNewBand = new ImplRegionBand( nTop, mpFirstBand->mnYTop );
+
+        if ( nBottom < mpFirstBand->mnYTop )
+        {
+            pNewBand->mnYBottom = nBottom;
+        }
+
+        // insert band into the list
+        pNewBand->mpNextBand = mpFirstBand;
+        mpFirstBand = pNewBand;
+
+        bTopBoundaryInserted = true;
+    }
+
+    // insert band(s) into the list
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while ( pBand )
+    {
+        // Insert Bands if possible
+        if ( !bTopBoundaryInserted )
+        {
+            bTopBoundaryInserted = InsertSingleBand( pBand, nTop - 1 );
+        }
+
+        if ( !bTop2BoundaryInserted )
+        {
+            bTop2BoundaryInserted = InsertSingleBand( pBand, nTop );
+        }
+
+        if ( !bBottomBoundaryInserted && (nTop != nBottom) )
+        {
+            bBottomBoundaryInserted = InsertSingleBand( pBand, nBottom );
+        }
+
+        // both boundaries inserted? -> nothing more to do
+        if ( bTopBoundaryInserted && bTop2BoundaryInserted && bBottomBoundaryInserted )
+        {
+            break;
+        }
+
+        // insert bands between two bands if necessary
+        if ( pBand->mpNextBand )
+        {
+            if ( (pBand->mnYBottom + 1) < pBand->mpNextBand->mnYTop )
+            {
+                // copy band with list and set new boundary
+                pNewBand = new ImplRegionBand( pBand->mnYBottom+1, pBand->mpNextBand->mnYTop-1 );
+
+                // insert band into the list
+                pNewBand->mpNextBand = pBand->mpNextBand;
+                pBand->mpNextBand = pNewBand;
+            }
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+bool RegionBand::InsertSingleBand(ImplRegionBand* pBand, tools::Long nYBandPosition)
+{
+    // boundary already included in band with height 1? -> nothing to do!
+    if ( (pBand->mnYTop == pBand->mnYBottom) && (nYBandPosition == pBand->mnYTop) )
+    {
+        return true;
+    }
+
+    // insert single height band on top?
+    ImplRegionBand* pNewBand;
+
+    if ( nYBandPosition == pBand->mnYTop )
+    {
+        // copy band with list and set new boundary
+        pNewBand = new ImplRegionBand( *pBand );
+        pNewBand->mnYTop = nYBandPosition+1;
+
+        // insert band into the list
+        pNewBand->mpNextBand = pBand->mpNextBand;
+        pBand->mnYBottom = nYBandPosition;
+        pBand->mpNextBand = pNewBand;
+
+        return true;
+    }
+
+    // top of new rectangle within the current band? -> insert new band and copy data
+    if ( (nYBandPosition > pBand->mnYTop) && (nYBandPosition < pBand->mnYBottom) )
+    {
+        // copy band with list and set new boundary
+        pNewBand = new ImplRegionBand( *pBand );
+        pNewBand->mnYTop = nYBandPosition;
+
+        // insert band into the list
+        pNewBand->mpNextBand = pBand->mpNextBand;
+        pBand->mnYBottom = nYBandPosition;
+        pBand->mpNextBand = pNewBand;
+
+        // copy band with list and set new boundary
+        pNewBand = new ImplRegionBand( *pBand );
+        pNewBand->mnYTop = nYBandPosition;
+
+        // insert band into the list
+        pBand->mpNextBand->mnYTop = nYBandPosition+1;
+
+        pNewBand->mpNextBand = pBand->mpNextBand;
+        pBand->mnYBottom = nYBandPosition - 1;
+        pBand->mpNextBand = pNewBand;
+
+        return true;
+    }
+
+    // create new band behind the current in the list
+    if ( !pBand->mpNextBand )
+    {
+        if ( nYBandPosition == pBand->mnYBottom )
+        {
+            // copy band with list and set new boundary
+            pNewBand = new ImplRegionBand( *pBand );
+            pNewBand->mnYTop = pBand->mnYBottom;
+            pNewBand->mnYBottom = nYBandPosition;
+
+            pBand->mnYBottom = nYBandPosition-1;
+
+            // append band to the list
+            pBand->mpNextBand = pNewBand;
+            return true;
+        }
+
+        if ( nYBandPosition > pBand->mnYBottom )
+        {
+            // create new band
+            pNewBand = new ImplRegionBand( pBand->mnYBottom + 1, nYBandPosition );
+
+            // append band to the list
+            pBand->mpNextBand = pNewBand;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+void RegionBand::Union(tools::Long nLeft, tools::Long nTop, tools::Long nRight, tools::Long nBottom)
+{
+    SAL_WARN_IF( nLeft > nRight, "vcl", "RegionBand::Union() - nLeft > nRight" );
+    SAL_WARN_IF( nTop > nBottom, "vcl", "RegionBand::Union() - nTop > nBottom" );
+
+    // process union
+    ImplRegionBand* pBand = mpFirstBand;
+    while ( pBand )
+    {
+        if ( pBand->mnYTop >= nTop )
+        {
+            if ( pBand->mnYBottom <= nBottom )
+                pBand->Union( nLeft, nRight );
+            else
+            {
+#ifdef DBG_UTIL
+                tools::Long nCurY = pBand->mnYBottom;
+                pBand = pBand->mpNextBand;
+                while ( pBand )
+                {
+                    if ( (pBand->mnYTop < nCurY) || (pBand->mnYBottom < nCurY) )
+                    {
+                        OSL_ENSURE(false, "RegionBand::Union() - Bands not sorted!" );
+                    }
+                    pBand = pBand->mpNextBand;
+                }
+#endif
+                break;
+            }
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::Intersect(tools::Long nLeft, tools::Long nTop, tools::Long nRight, tools::Long nBottom)
+{
+    // process intersections
+    ImplRegionBand* pPrevBand = nullptr;
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        // band within intersection boundary? -> process. otherwise remove
+        if((pBand->mnYTop >= nTop) && (pBand->mnYBottom <= nBottom))
+        {
+            // process intersection
+            pBand->Intersect(nLeft, nRight);
+            pPrevBand = pBand;
+            pBand = pBand->mpNextBand;
+        }
+        else
+        {
+            ImplRegionBand* pOldBand = pBand;
+
+            if(pBand == mpFirstBand)
+            {
+                mpFirstBand = pBand->mpNextBand;
+            }
+            else
+            {
+                pPrevBand->mpNextBand = pBand->mpNextBand;
+            }
+
+            pBand = pBand->mpNextBand;
+            delete pOldBand;
+        }
+    }
+
+}
+
+void RegionBand::Union(const RegionBand& rSource)
+{
+    // apply all rectangles from rSource to this
+    ImplRegionBand* pBand = rSource.mpFirstBand;
+
+    while ( pBand )
+    {
+        // insert bands if the boundaries are not already in the list
+        InsertBands(pBand->mnYTop, pBand->mnYBottom);
+
+        // process all elements of the list
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while(pSep)
+        {
+            Union(pSep->mnXLeft, pBand->mnYTop, pSep->mnXRight, pBand->mnYBottom);
+            pSep = pSep->mpNextSep;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::Exclude(tools::Long nLeft, tools::Long nTop, tools::Long nRight, tools::Long nBottom)
+{
+    SAL_WARN_IF( nLeft > nRight, "vcl", "RegionBand::Exclude() - nLeft > nRight" );
+    SAL_WARN_IF( nTop > nBottom, "vcl", "RegionBand::Exclude() - nTop > nBottom" );
+
+    // process exclude
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        if(pBand->mnYTop >= nTop)
+        {
+            if(pBand->mnYBottom <= nBottom)
+            {
+                pBand->Exclude(nLeft, nRight);
+            }
+            else
+            {
+#ifdef DBG_UTIL
+                tools::Long nCurY = pBand->mnYBottom;
+                pBand = pBand->mpNextBand;
+
+                while(pBand)
+                {
+                    if((pBand->mnYTop < nCurY) || (pBand->mnYBottom < nCurY))
+                    {
+                        OSL_ENSURE(false, "RegionBand::Exclude() - Bands not sorted!" );
+                    }
+
+                    pBand = pBand->mpNextBand;
+                }
+#endif
+                break;
+            }
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::XOr(tools::Long nLeft, tools::Long nTop, tools::Long nRight, tools::Long nBottom)
+{
+    SAL_WARN_IF( nLeft > nRight, "vcl", "RegionBand::Exclude() - nLeft > nRight" );
+    SAL_WARN_IF( nTop > nBottom, "vcl", "RegionBand::Exclude() - nTop > nBottom" );
+
+    // process xor
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        if(pBand->mnYTop >= nTop)
+        {
+            if(pBand->mnYBottom <= nBottom)
+            {
+                pBand->XOr(nLeft, nRight);
+            }
+            else
+            {
+#ifdef DBG_UTIL
+                tools::Long nCurY = pBand->mnYBottom;
+                pBand = pBand->mpNextBand;
+
+                while(pBand)
+                {
+                    if((pBand->mnYTop < nCurY) || (pBand->mnYBottom < nCurY))
+                    {
+                        OSL_ENSURE(false, "RegionBand::XOr() - Bands not sorted!" );
+                    }
+
+                    pBand = pBand->mpNextBand;
+                }
+#endif
+                break;
+            }
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+}
+
+void RegionBand::Intersect(const RegionBand& rSource)
+{
+    // mark all bands as untouched
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while ( pBand )
+    {
+        pBand->mbTouched = false;
+        pBand = pBand->mpNextBand;
+    }
+
+    pBand = rSource.mpFirstBand;
+
+    while ( pBand )
+    {
+        // insert bands if the boundaries are not already in the list
+        InsertBands( pBand->mnYTop, pBand->mnYBottom );
+
+        // process all elements of the list
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while ( pSep )
+        {
+            // left boundary?
+            if ( pSep == pBand->mpFirstSep )
+            {
+                // process intersection and do not remove untouched bands
+                Exclude( LONG_MIN+1, pBand->mnYTop, pSep->mnXLeft-1, pBand->mnYBottom );
+            }
+
+            // right boundary?
+            if ( pSep->mpNextSep == nullptr )
+            {
+                // process intersection and do not remove untouched bands
+                Exclude( pSep->mnXRight+1, pBand->mnYTop, LONG_MAX-1, pBand->mnYBottom );
+            }
+            else
+            {
+                // process intersection and do not remove untouched bands
+                Exclude( pSep->mnXRight+1, pBand->mnYTop, pSep->mpNextSep->mnXLeft-1, pBand->mnYBottom );
+            }
+
+            pSep = pSep->mpNextSep;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+    // remove all untouched bands if bands already left
+    ImplRegionBand* pPrevBand = nullptr;
+    pBand = mpFirstBand;
+
+    while ( pBand )
+    {
+        if ( !pBand->mbTouched )
+        {
+            // save pointer
+            ImplRegionBand* pOldBand = pBand;
+
+            // previous element of the list
+            if ( pBand == mpFirstBand )
+            {
+                mpFirstBand = pBand->mpNextBand;
+            }
+            else
+            {
+                pPrevBand->mpNextBand = pBand->mpNextBand;
+            }
+
+            pBand = pBand->mpNextBand;
+            delete pOldBand;
+        }
+        else
+        {
+            pPrevBand = pBand;
+            pBand = pBand->mpNextBand;
+        }
+    }
+
+}
+
+bool RegionBand::Exclude(const RegionBand& rSource)
+{
+    // apply all rectangles to the region passed to this region
+    ImplRegionBand* pBand = rSource.mpFirstBand;
+
+    while ( pBand )
+    {
+        // insert bands if the boundaries are not already in the list
+        InsertBands( pBand->mnYTop, pBand->mnYBottom );
+
+        // process all elements of the list
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while ( pSep )
+        {
+            Exclude( pSep->mnXLeft, pBand->mnYTop, pSep->mnXRight, pBand->mnYBottom );
+            pSep = pSep->mpNextSep;
+        }
+
+        // to test less bands, already check in the loop
+        if ( !OptimizeBandList() )
+        {
+            return false;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+    return true;
+}
+
+bool RegionBand::CheckConsistency() const
+{
+    if (!mpFirstBand)
+        return true;
+    // look in the band list (don't test first band again!)
+    const ImplRegionBand* pBand = mpFirstBand->mpNextBand;
+    while (pBand)
+    {
+        if (!pBand->mpFirstSep)
+            return false;
+        pBand = pBand->mpNextBand;
+    }
+    return true;
+}
+
+tools::Rectangle RegionBand::GetBoundRect() const
+{
+
+    // get the boundaries of the first band
+    tools::Long nYTop(mpFirstBand->mnYTop);
+    tools::Long nYBottom(mpFirstBand->mnYBottom);
+    tools::Long nXLeft(mpFirstBand->GetXLeftBoundary());
+    tools::Long nXRight(mpFirstBand->GetXRightBoundary());
+
+    // look in the band list (don't test first band again!)
+    ImplRegionBand* pBand = mpFirstBand->mpNextBand;
+
+    while ( pBand )
+    {
+        nYBottom = pBand->mnYBottom;
+        nXLeft = std::min( nXLeft, pBand->GetXLeftBoundary() );
+        nXRight = std::max( nXRight, pBand->GetXRightBoundary() );
+
+        pBand = pBand->mpNextBand;
+    }
+
+    return tools::Rectangle( nXLeft, nYTop, nXRight, nYBottom );
+}
+
+void RegionBand::XOr(const RegionBand& rSource)
+{
+    ImplRegionBand* pBand = rSource.mpFirstBand;
+
+    while ( pBand )
+    {
+        // insert bands if the boundaries are not already in the list
+        InsertBands( pBand->mnYTop, pBand->mnYBottom );
+
+        // process all elements of the list
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while ( pSep )
+        {
+            XOr( pSep->mnXLeft, pBand->mnYTop, pSep->mnXRight, pBand->mnYBottom );
+            pSep = pSep->mpNextSep;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+}
+
+bool RegionBand::Contains(const Point& rPoint) const
+{
+
+    // search band list
+    ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        // is point within band?
+        if((pBand->mnYTop <= rPoint.Y()) && (pBand->mnYBottom >= rPoint.Y()))
+        {
+            // is point within separation of the band?
+            return pBand->Contains(rPoint.X());
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+    return false;
+}
+
+void RegionBand::GetRegionRectangles(RectangleVector& rTarget) const
+{
+    // clear result vector
+    rTarget.clear();
+    ImplRegionBand* pCurrRectBand = mpFirstBand;
+    tools::Rectangle aRectangle;
+
+    while(pCurrRectBand)
+    {
+        ImplRegionBandSep* pCurrRectBandSep = pCurrRectBand->mpFirstSep;
+
+        aRectangle.SetTop( pCurrRectBand->mnYTop );
+        aRectangle.SetBottom( pCurrRectBand->mnYBottom );
+
+        while(pCurrRectBandSep)
+        {
+            aRectangle.SetLeft( pCurrRectBandSep->mnXLeft );
+            aRectangle.SetRight( pCurrRectBandSep->mnXRight );
+            rTarget.push_back(aRectangle);
+            pCurrRectBandSep = pCurrRectBandSep->mpNextSep;
+        }
+
+        pCurrRectBand = pCurrRectBand->mpNextBand;
+    }
+}
+
+sal_uInt32 RegionBand::getRectangleCount() const
+{
+    sal_uInt32 nCount = 0;
+    const ImplRegionBand* pBand = mpFirstBand;
+
+    while(pBand)
+    {
+        ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+        while(pSep)
+        {
+            nCount++;
+            pSep = pSep->mpNextSep;
+        }
+
+        pBand = pBand->mpNextBand;
+    }
+
+    return nCount;
+}
+
+#ifdef DBG_UTIL
+const char* ImplDbgTestRegionBand(const void* pObj)
+{
+    const RegionBand* pRegionBand = static_cast< const RegionBand* >(pObj);
+
+    if(pRegionBand)
+    {
+        const ImplRegionBand* pBand = pRegionBand->ImplGetFirstRegionBand();
+
+        while(pBand)
+        {
+            if(pBand->mnYBottom < pBand->mnYTop)
+            {
+                return "YBottom < YTop";
+            }
+
+            if(pBand->mpNextBand)
+            {
+                if(pBand->mnYBottom >= pBand->mpNextBand->mnYTop)
+                {
+                    return "overlapping bands in region";
+                }
+            }
+
+            if(pBand->mbTouched)
+            {
+                return "Band-mbTouched overwrite";
+            }
+
+            ImplRegionBandSep* pSep = pBand->mpFirstSep;
+
+            while(pSep)
+            {
+                if(pSep->mnXRight < pSep->mnXLeft)
+                {
+                    return "XLeft < XRight";
+                }
+
+                if(pSep->mpNextSep)
+                {
+                    if(pSep->mnXRight >= pSep->mpNextSep->mnXLeft)
+                    {
+                        return "overlapping separations in region";
+                    }
+                }
+
+                if ( pSep->mbRemoved )
+                {
+                    return "Sep-mbRemoved overwrite";
+                }
+
+                pSep = pSep->mpNextSep;
+            }
+
+            pBand = pBand->mpNextBand;
+        }
+    }
+
+    return nullptr;
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */