Adding upstream version 4:24.2.0.upstream/4%24.2.0

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

1 files changed, 2491 insertions, 0 deletions

diff --git a/starmath/source/node.cxx b/starmath/source/node.cxx
new file mode 100644
index 0000000000..778baaa74d
--- /dev/null
+++ b/starmath/source/node.cxx
@@ -0,0 +1,2491 @@
+/* -*- 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 <symbol.hxx>
+#include <smmod.hxx>
+#include "tmpdevice.hxx"
+#include <utility>
+#include <visitors.hxx>
+#include <tools/UnitConversion.hxx>
+#include <vcl/metric.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/diagnose.h>
+#include <basegfx/numeric/ftools.hxx>
+#include <unicode/uchar.h>
+#include <unicode/uscript.h>
+
+namespace {
+
+template<typename F>
+void ForEachNonNull(SmNode *pNode, F && f)
+{
+    size_t nSize = pNode->GetNumSubNodes();
+    for (size_t i = 0; i < nSize; ++i)
+    {
+        SmNode *pSubNode = pNode->GetSubNode(i);
+        if (pSubNode != nullptr)
+            f(pSubNode);
+    }
+}
+
+}
+
+SmNode::SmNode(SmNodeType eNodeType, SmToken aNodeToken)
+    : maNodeToken(std::move( aNodeToken ))
+    , meType( eNodeType )
+    , meScaleMode( SmScaleMode::None )
+    , meRectHorAlign( RectHorAlign::Left )
+    , mnFlags( FontChangeMask::None )
+    , mnAttributes( FontAttribute::None )
+    , mbIsPhantom( false )
+    , mbIsSelected( false )
+    , mnAccIndex( -1 )
+    , mpParentNode( nullptr )
+{
+}
+
+SmNode::~SmNode()
+{
+}
+
+const SmNode * SmNode::GetLeftMost() const
+    //  returns leftmost node of current subtree.
+    //! (this assumes the one with index 0 is always the leftmost subnode
+    //! for the current node).
+{
+    const SmNode *pNode = GetNumSubNodes() > 0 ?
+                        GetSubNode(0) : nullptr;
+
+    return pNode ? pNode->GetLeftMost() : this;
+}
+
+
+void SmNode::SetPhantom(bool bIsPhantomP)
+{
+    if (! (Flags() & FontChangeMask::Phantom))
+        mbIsPhantom = bIsPhantomP;
+
+    bool b = mbIsPhantom;
+    ForEachNonNull(this, [b](SmNode *pNode){pNode->SetPhantom(b);});
+}
+
+
+void SmNode::SetColor(const Color& rColor)
+{
+    if (! (Flags() & FontChangeMask::Color))
+        GetFont().SetColor(rColor);
+
+    ForEachNonNull(this, [&rColor](SmNode *pNode){pNode->SetColor(rColor);});
+}
+
+
+void SmNode::SetAttribute(FontAttribute nAttrib)
+{
+    if (
+        (nAttrib == FontAttribute::Bold && !(Flags() & FontChangeMask::Bold)) ||
+        (nAttrib == FontAttribute::Italic && !(Flags() & FontChangeMask::Italic))
+       )
+    {
+        mnAttributes |= nAttrib;
+    }
+
+    ForEachNonNull(this, [nAttrib](SmNode *pNode){pNode->SetAttribute(nAttrib);});
+}
+
+
+void SmNode::ClearAttribute(FontAttribute nAttrib)
+{
+    if (
+        (nAttrib == FontAttribute::Bold && !(Flags() & FontChangeMask::Bold)) ||
+        (nAttrib == FontAttribute::Italic && !(Flags() & FontChangeMask::Italic))
+       )
+    {
+        mnAttributes &= ~nAttrib;
+    }
+
+    ForEachNonNull(this, [nAttrib](SmNode *pNode){pNode->ClearAttribute(nAttrib);});
+}
+
+
+void SmNode::SetFont(const SmFace &rFace)
+{
+    if (!(Flags() & FontChangeMask::Face))
+        GetFont() = rFace;
+    ForEachNonNull(this, [&rFace](SmNode *pNode){pNode->SetFont(rFace);});
+}
+
+
+void SmNode::SetFontSize(const Fraction &rSize, FontSizeType nType)
+    //! 'rSize' is in units of pts
+{
+    Size  aFntSize;
+
+    if (!(Flags() & FontChangeMask::Size))
+    {
+        Fraction aVal(conversionFract(o3tl::Length::pt, SmO3tlLengthUnit()) * rSize);
+        tools::Long      nHeight = static_cast<tools::Long>(aVal);
+
+        aFntSize = GetFont().GetFontSize();
+        aFntSize.setWidth( 0 );
+        switch(nType)
+        {
+            case FontSizeType::ABSOLUT:
+                aFntSize.setHeight( nHeight );
+                break;
+
+            case FontSizeType::PLUS:
+                aFntSize.AdjustHeight(nHeight );
+                break;
+
+            case FontSizeType::MINUS:
+                aFntSize.AdjustHeight( -nHeight );
+                break;
+
+            case FontSizeType::MULTIPLY:
+                aFntSize.setHeight( static_cast<tools::Long>(Fraction(aFntSize.Height()) * rSize) );
+                break;
+
+            case FontSizeType::DIVIDE:
+                if (rSize != Fraction(0))
+                    aFntSize.setHeight( static_cast<tools::Long>(Fraction(aFntSize.Height()) / rSize) );
+                break;
+            default:
+                break;
+        }
+
+        // check the requested size against maximum value
+        const int nMaxVal = o3tl::convert(128, o3tl::Length::pt, SmO3tlLengthUnit());
+        if (aFntSize.Height() > nMaxVal)
+            aFntSize.setHeight( nMaxVal );
+
+        GetFont().SetSize(aFntSize);
+    }
+
+    ForEachNonNull(this, [&rSize, &nType](SmNode *pNode){pNode->SetFontSize(rSize, nType);});
+}
+
+
+void SmNode::SetSize(const Fraction &rSize)
+{
+    GetFont() *= rSize;
+
+    ForEachNonNull(this, [&rSize](SmNode *pNode){pNode->SetSize(rSize);});
+}
+
+
+void SmNode::SetRectHorAlign(RectHorAlign eHorAlign, bool bApplyToSubTree )
+{
+    meRectHorAlign = eHorAlign;
+
+    if (bApplyToSubTree)
+        ForEachNonNull(this, [eHorAlign](SmNode *pNode){pNode->SetRectHorAlign(eHorAlign);});
+}
+
+
+void SmNode::PrepareAttributes()
+{
+    GetFont().SetWeight((Attributes() & FontAttribute::Bold)   ? WEIGHT_BOLD   : WEIGHT_NORMAL);
+    GetFont().SetItalic((Attributes() & FontAttribute::Italic) ? ITALIC_NORMAL : ITALIC_NONE);
+}
+
+
+void SmNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    if (nDepth > 1024)
+        throw std::range_error("parser depth limit");
+
+    mbIsPhantom  = false;
+    mnFlags      = FontChangeMask::None;
+    mnAttributes = FontAttribute::None;
+
+    switch (rFormat.GetHorAlign())
+    {   case SmHorAlign::Left:     meRectHorAlign = RectHorAlign::Left;   break;
+        case SmHorAlign::Center:   meRectHorAlign = RectHorAlign::Center; break;
+        case SmHorAlign::Right:    meRectHorAlign = RectHorAlign::Right;  break;
+    }
+
+    GetFont() = rFormat.GetFont(FNT_MATH);
+    OSL_ENSURE( GetFont().GetCharSet() == RTL_TEXTENCODING_UNICODE,
+            "unexpected CharSet" );
+    GetFont().SetWeight(WEIGHT_NORMAL);
+    GetFont().SetItalic(ITALIC_NONE);
+
+    ForEachNonNull(this, [&rFormat, &rDocShell, nDepth](SmNode *pNode){pNode->Prepare(rFormat, rDocShell, nDepth + 1);});
+}
+
+void SmNode::Move(const Point& rVector)
+{
+    if (rVector.X() == 0  &&  rVector.Y() == 0)
+        return;
+
+    SmRect::Move(rVector);
+
+    ForEachNonNull(this, [&rVector](SmNode *pNode){pNode->Move(rVector);});
+}
+
+void SmNode::AdaptToX(OutputDevice &/*rDev*/, sal_uLong /*nWidth*/)
+{
+}
+
+
+void SmNode::AdaptToY(OutputDevice &/*rDev*/, sal_uLong /*nHeight*/)
+{
+}
+
+
+const SmNode * SmNode::FindTokenAt(sal_uInt16 nRow, sal_uInt16 nCol) const
+    // returns (first) ** visible ** (sub)node with the tokens text at
+    // position 'nRow', 'nCol'.
+    //! (there should be exactly one such node if any)
+{
+    if (    IsVisible()
+        &&  nRow == GetSelection().nStartPara
+        &&  nCol >= GetSelection().nStartPos  &&  nCol <= GetSelection().nEndPos )
+        return this;
+    else
+    {
+        size_t nNumSubNodes = GetNumSubNodes();
+        for (size_t i = 0;  i < nNumSubNodes; ++i)
+        {
+            const SmNode *pNode = GetSubNode(i);
+
+            if (!pNode)
+                continue;
+
+            const SmNode *pResult = pNode->FindTokenAt(nRow, nCol);
+            if (pResult)
+                return pResult;
+        }
+    }
+
+    return nullptr;
+}
+
+
+const SmNode * SmNode::FindRectClosestTo(const Point &rPoint) const
+{
+    tools::Long          nDist   = LONG_MAX;
+    const SmNode *pResult = nullptr;
+
+    if (IsVisible())
+        pResult = this;
+    else
+    {
+        size_t nNumSubNodes = GetNumSubNodes();
+        for (size_t i = 0;  i < nNumSubNodes; ++i)
+        {
+            const SmNode *pNode = GetSubNode(i);
+
+            if (!pNode)
+                continue;
+
+            const SmNode *pFound = pNode->FindRectClosestTo(rPoint);
+            if (pFound)
+            {
+                tools::Long nTmp = pFound->OrientedDist(rPoint);
+                if (nTmp < nDist)
+                {
+                    nDist   = nTmp;
+                    pResult = pFound;
+
+                    // quit immediately if 'rPoint' is inside the *should not
+                    // overlap with other rectangles* part.
+                    // This (partly) serves for getting the attributes in eg
+                    // "bar overstrike a".
+                    // ('nDist < 0' is used as *quick shot* to avoid evaluation of
+                    // the following expression, where the result is already determined)
+                    if (nDist < 0  &&  pFound->IsInsideRect(rPoint))
+                        break;
+                }
+            }
+        }
+    }
+
+    return pResult;
+}
+
+const SmNode * SmNode::FindNodeWithAccessibleIndex(sal_Int32 nAccIdx) const
+{
+    const SmNode *pResult = nullptr;
+
+    sal_Int32 nIdx = GetAccessibleIndex();
+    OUStringBuffer aTxt;
+    if (nIdx >= 0)
+        GetAccessibleText( aTxt );  // get text if used in following 'if' statement
+
+    if (nIdx >= 0
+        &&  nIdx <= nAccIdx  &&  nAccIdx < nIdx + aTxt.getLength())
+        pResult = this;
+    else
+    {
+        size_t nNumSubNodes = GetNumSubNodes();
+        for (size_t i = 0; i < nNumSubNodes; ++i)
+        {
+            const SmNode *pNode = GetSubNode(i);
+            if (!pNode)
+                continue;
+
+            pResult = pNode->FindNodeWithAccessibleIndex(nAccIdx);
+            if (pResult)
+                return pResult;
+        }
+    }
+
+    return pResult;
+}
+
+
+SmStructureNode::~SmStructureNode()
+{
+    ForEachNonNull(this, std::default_delete<SmNode>());
+}
+
+
+void SmStructureNode::ClearSubNodes()
+{
+    maSubNodes.clear();
+}
+
+void SmStructureNode::SetSubNodes(std::unique_ptr<SmNode> pFirst, std::unique_ptr<SmNode> pSecond, std::unique_ptr<SmNode> pThird)
+{
+    size_t nSize = pThird ? 3 : (pSecond ? 2 : (pFirst ? 1 : 0));
+    maSubNodes.resize( nSize );
+    if (pFirst)
+        maSubNodes[0] = pFirst.release();
+    if (pSecond)
+        maSubNodes[1] = pSecond.release();
+    if (pThird)
+        maSubNodes[2] = pThird.release();
+
+    ClaimPaternity();
+}
+
+void SmStructureNode::SetSubNodes(SmNode* pFirst, SmNode* pSecond, SmNode* pThird)
+{
+    size_t nSize = pThird ? 3 : (pSecond ? 2 : (pFirst ? 1 : 0));
+    maSubNodes.resize( nSize );
+    if (pFirst)
+        maSubNodes[0] = pFirst;
+    if (pSecond)
+        maSubNodes[1] = pSecond;
+    if (pThird)
+        maSubNodes[2] = pThird;
+
+    ClaimPaternity();
+}
+
+void SmStructureNode::SetSubNodesBinMo(std::unique_ptr<SmNode> pFirst, std::unique_ptr<SmNode> pSecond, std::unique_ptr<SmNode> pThird)
+{
+    if(GetType()==SmNodeType::BinDiagonal)
+    {
+        size_t nSize = pSecond ? 3 : (pThird ? 2 : (pFirst ? 1 : 0));
+        maSubNodes.resize( nSize );
+        if (pFirst)
+            maSubNodes[0] = pFirst.release();
+        if (pSecond)
+            maSubNodes[2] = pSecond.release();
+        if (pThird)
+            maSubNodes[1] = pThird.release();
+    }
+    else
+    {
+        size_t nSize = pThird ? 3 : (pSecond ? 2 : (pFirst ? 1 : 0));
+        maSubNodes.resize( nSize );
+        if (pFirst)
+            maSubNodes[0] = pFirst.release();
+        if (pSecond)
+            maSubNodes[1] = pSecond.release();
+        if (pThird)
+            maSubNodes[2] = pThird.release();
+    }
+    ClaimPaternity();
+}
+
+void SmStructureNode::SetSubNodes(SmNodeArray&& rNodeArray)
+{
+    maSubNodes = std::move(rNodeArray);
+    ClaimPaternity();
+}
+
+bool SmStructureNode::IsVisible() const
+{
+    return false;
+}
+
+size_t SmStructureNode::GetNumSubNodes() const
+{
+    return maSubNodes.size();
+}
+
+SmNode* SmStructureNode::GetSubNode(size_t nIndex)
+{
+    return maSubNodes[nIndex];
+}
+
+SmNode* SmStructureNode::GetSubNodeBinMo(size_t nIndex) const
+{
+    if(GetType()==SmNodeType::BinDiagonal)
+    {
+        if (nIndex==1)
+            nIndex = 2;
+        else if (nIndex==2)
+            nIndex = 1;
+    }
+    return maSubNodes[nIndex];
+}
+
+void SmStructureNode::GetAccessibleText( OUStringBuffer &rText ) const
+{
+    ForEachNonNull(const_cast<SmStructureNode *>(this),
+                   [&rText](SmNode *pNode)
+        {
+            if (pNode->IsVisible())
+                pNode->SetAccessibleIndex(rText.getLength());
+            pNode->GetAccessibleText( rText );
+        });
+}
+
+void SmStructureNode::ClaimPaternity()
+{
+    ForEachNonNull(this, [this](SmNode *pNode){pNode->SetParent(this);});
+}
+
+int SmStructureNode::IndexOfSubNode(SmNode const * pSubNode)
+{
+    size_t nSize = GetNumSubNodes();
+    for (size_t i = 0; i < nSize; i++)
+        if (pSubNode == GetSubNode(i))
+            return i;
+    return -1;
+}
+
+void SmStructureNode::SetSubNode(size_t nIndex, SmNode* pNode)
+{
+    size_t size = maSubNodes.size();
+    if (size <= nIndex)
+    {
+        //Resize subnodes array
+        maSubNodes.resize(nIndex + 1);
+        //Set new slots to NULL except at nIndex
+        for (size_t i = size; i < nIndex; i++)
+            maSubNodes[i] = nullptr;
+    }
+    maSubNodes[nIndex] = pNode;
+    if (pNode)
+        pNode->SetParent(this);
+}
+
+bool SmVisibleNode::IsVisible() const
+{
+    return true;
+}
+
+size_t SmVisibleNode::GetNumSubNodes() const
+{
+    return 0;
+}
+
+SmNode * SmVisibleNode::GetSubNode(size_t /*nIndex*/)
+{
+    return nullptr;
+}
+
+void SmGraphicNode::GetAccessibleText( OUStringBuffer &rText ) const
+{
+    rText.append(GetToken().aText);
+}
+
+void SmTableNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+    // arranges all subnodes in one column
+{
+    SmNode *pNode;
+    size_t nSize = GetNumSubNodes();
+
+    // make distance depend on font size
+    tools::Long  nDist = +(rFormat.GetDistance(DIS_VERTICAL)
+                    * GetFont().GetFontSize().Height()) / 100;
+
+    if (nSize < 1)
+        return;
+
+    // arrange subnodes and get maximum width of them
+    tools::Long  nMaxWidth = 0,
+          nTmp;
+    for (size_t i = 0; i < nSize; ++i)
+    {
+        if (nullptr != (pNode = GetSubNode(i)))
+        {   pNode->Arrange(rDev, rFormat);
+            if ((nTmp = pNode->GetItalicWidth()) > nMaxWidth)
+                nMaxWidth = nTmp;
+        }
+    }
+
+    Point  aPos;
+    SmRect::operator = (SmRect(nMaxWidth, 1));
+    for (size_t i = 0; i < nSize; ++i)
+    {
+        if (nullptr != (pNode = GetSubNode(i)))
+        {   const SmRect &rNodeRect = pNode->GetRect();
+            const SmNode *pCoNode   = pNode->GetLeftMost();
+            RectHorAlign  eHorAlign = pCoNode->GetRectHorAlign();
+
+            aPos = rNodeRect.AlignTo(*this, RectPos::Bottom,
+                        eHorAlign, RectVerAlign::Baseline);
+            if (i)
+                aPos.AdjustY(nDist );
+            pNode->MoveTo(aPos);
+            ExtendBy(rNodeRect, nSize > 1 ? RectCopyMBL::None : RectCopyMBL::Arg);
+        }
+    }
+    // #i972#
+    if (HasBaseline())
+        mnFormulaBaseline = GetBaseline();
+    else
+    {
+        SmTmpDevice aTmpDev (rDev, true);
+        aTmpDev.SetFont(GetFont());
+
+        SmRect aRect(aTmpDev, &rFormat, "a", GetFont().GetBorderWidth());
+        mnFormulaBaseline = GetAlignM();
+        // move from middle position by constant - distance
+        // between middle and baseline for single letter
+        mnFormulaBaseline += aRect.GetBaseline() - aRect.GetAlignM();
+    }
+}
+
+const SmNode * SmTableNode::GetLeftMost() const
+{
+    return this;
+}
+
+
+tools::Long SmTableNode::GetFormulaBaseline() const
+{
+    return mnFormulaBaseline;
+}
+
+
+/**************************************************************************/
+
+
+void SmLineNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    // Here we use the 'FNT_VARIABLE' font since it's ascent and descent in general fit better
+    // to the rest of the formula compared to the 'FNT_MATH' font.
+    GetFont() = rFormat.GetFont(FNT_VARIABLE);
+    Flags() |= FontChangeMask::Face;
+}
+
+
+/**************************************************************************/
+
+
+void SmLineNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+    // arranges all subnodes in one row with some extra space between
+{
+    SmNode *pNode;
+    size_t nSize = GetNumSubNodes();
+    for (size_t i = 0; i < nSize; ++i)
+    {
+        if (nullptr != (pNode = GetSubNode(i)))
+            pNode->Arrange(rDev, rFormat);
+    }
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    if (nSize < 1)
+    {
+        // provide an empty rectangle with alignment parameters for the "current"
+        // font (in order to make "a^1 {}_2^3 a_4" work correct, that is, have the
+        // same sub-/supscript positions.)
+        //! be sure to use a character that has explicitly defined HiAttribut
+        //! line in rect.cxx such as 'a' in order to make 'vec a' look same to
+        //! 'vec {a}'.
+        SmRect::operator = (SmRect(aTmpDev, &rFormat, "a",
+                            GetFont().GetBorderWidth()));
+        // make sure that the rectangle occupies (almost) no space
+        SetWidth(1);
+        SetItalicSpaces(0, 0);
+        return;
+    }
+
+    // make distance depend on font size
+    tools::Long nDist = (rFormat.GetDistance(DIS_HORIZONTAL) * GetFont().GetFontSize().Height()) / 100;
+    if (!IsUseExtraSpaces())
+        nDist = 0;
+
+    Point   aPos;
+    // copy the first node into LineNode and extend by the others
+    if (nullptr != (pNode = GetSubNode(0)))
+        SmRect::operator = (pNode->GetRect());
+
+    for (size_t i = 1;  i < nSize; ++i)
+    {
+        if (nullptr != (pNode = GetSubNode(i)))
+        {
+            aPos = pNode->AlignTo(*this, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+
+            // add horizontal space to the left for each but the first sub node
+            aPos.AdjustX(nDist );
+
+            pNode->MoveTo(aPos);
+            ExtendBy( *pNode, RectCopyMBL::Xor );
+        }
+    }
+}
+
+
+/**************************************************************************/
+
+
+void SmExpressionNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+    // as 'SmLineNode::Arrange' but keeps alignment of leftmost subnode
+{
+    SmLineNode::Arrange(rDev, rFormat);
+
+    //  copy alignment of leftmost subnode if any
+    const SmNode *pNode = GetLeftMost();
+    if (pNode)
+        SetRectHorAlign(pNode->GetRectHorAlign(), false);
+}
+
+
+/**************************************************************************/
+
+
+void SmUnHorNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    bool  bIsPostfix = GetToken().eType == TFACT;
+
+    SmNode *pNode0 = GetSubNode(0),
+           *pNode1 = GetSubNode(1);
+    SmNode *pOper = bIsPostfix ? pNode1 : pNode0,
+           *pBody = bIsPostfix ? pNode0 : pNode1;
+    assert(pOper);
+    assert(pBody);
+
+    pOper->SetSize(Fraction (rFormat.GetRelSize(SIZ_OPERATOR), 100));
+    pOper->Arrange(rDev, rFormat);
+    pBody->Arrange(rDev, rFormat);
+
+    tools::Long nDist = (pOper->GetRect().GetWidth() * rFormat.GetDistance(DIS_HORIZONTAL)) / 100;
+
+    SmRect::operator = (*pNode0);
+
+    Point aPos = pNode1->AlignTo(*this, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+    aPos.AdjustX(nDist );
+    pNode1->MoveTo(aPos);
+    ExtendBy(*pNode1, RectCopyMBL::Xor);
+}
+
+
+/**************************************************************************/
+
+namespace {
+
+void lcl_GetHeightVerOffset(const SmRect &rRect,
+                                    tools::Long &rHeight, tools::Long &rVerOffset)
+    // calculate height and vertical offset of root sign suitable for 'rRect'
+{
+    rVerOffset = (rRect.GetBottom() - rRect.GetAlignB()) / 2;
+    rHeight    = rRect.GetHeight() - rVerOffset;
+
+    OSL_ENSURE(rHeight    >= 0, "Sm : Ooops...");
+    OSL_ENSURE(rVerOffset >= 0, "Sm : Ooops...");
+}
+
+
+Point lcl_GetExtraPos(const SmRect &rRootSymbol,
+                              const SmRect &rExtra)
+{
+    const Size &rSymSize = rRootSymbol.GetSize();
+
+    Point  aPos = rRootSymbol.GetTopLeft()
+            + Point((rSymSize.Width()  * 70) / 100,
+                    (rSymSize.Height() * 52) / 100);
+
+    // from this calculate topleft edge of 'rExtra'
+    aPos.AdjustX( -(rExtra.GetWidth() + rExtra.GetItalicRightSpace()) );
+    aPos.AdjustY( -(rExtra.GetHeight()) );
+    // if there's enough space move a bit less to the right
+    // examples: "nroot i a", "nroot j a"
+    // (it looks better if we don't use italic-spaces here)
+    tools::Long  nX = rRootSymbol.GetLeft() + (rSymSize.Width() * 30) / 100;
+    if (aPos.X() > nX)
+        aPos.setX( nX );
+
+    return aPos;
+}
+
+}
+
+void SmRootNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    //! pExtra needs to have the smaller index than pRootSym in order to
+    //! not to get the root symbol but the pExtra when clicking on it in the
+    //! GraphicWindow. (That is because of the simplicity of the algorithm
+    //! that finds the node corresponding to a mouseclick in the window.)
+    SmNode *pExtra   = GetSubNode(0),
+           *pRootSym = GetSubNode(1),
+           *pBody    = GetSubNode(2);
+    assert(pRootSym);
+    assert(pBody);
+
+    pBody->Arrange(rDev, rFormat);
+
+    tools::Long  nHeight,
+          nVerOffset;
+    lcl_GetHeightVerOffset(*pBody, nHeight, nVerOffset);
+    nHeight += rFormat.GetDistance(DIS_ROOT)
+               * GetFont().GetFontSize().Height() / 100;
+
+    if (nHeight < 0)
+    {
+        SAL_WARN("starmath", "negative height");
+        nHeight = 0;
+    }
+
+    // font specialist advised to change the width first
+    pRootSym->AdaptToY(rDev, nHeight);
+    pRootSym->AdaptToX(rDev, pBody->GetItalicWidth());
+
+    pRootSym->Arrange(rDev, rFormat);
+
+    // Set the top and bottom of the root symbol to the top and bottom of its glyph bounding rect,
+    // to get accurate position of the root symbol.
+    SmRect rRootSymRect = pRootSym->AsGlyphRect();
+    pRootSym->SetTop(rRootSymRect.GetTop());
+    pRootSym->SetBottom(rRootSymRect.GetBottom());
+
+    Point  aPos = pRootSym->AlignTo(*pBody, RectPos::Left, RectHorAlign::Center, RectVerAlign::Baseline);
+    //! override calculated vertical position
+    aPos.setY( pRootSym->GetTop() + pBody->GetBottom() - pRootSym->GetBottom() );
+    aPos.AdjustY( -nVerOffset );
+    pRootSym->MoveTo(aPos);
+
+    if (pExtra)
+    {   pExtra->SetSize(Fraction(rFormat.GetRelSize(SIZ_INDEX), 100));
+        pExtra->Arrange(rDev, rFormat);
+
+        aPos = lcl_GetExtraPos(*pRootSym, *pExtra);
+        pExtra->MoveTo(aPos);
+    }
+
+    SmRect::operator = (*pBody);
+    ExtendBy(*pRootSym, RectCopyMBL::This);
+    if (pExtra)
+        ExtendBy(*pExtra, RectCopyMBL::This, true);
+}
+
+/**************************************************************************/
+
+
+void SmBinHorNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pLeft  = LeftOperand(),
+           *pOper  = Symbol(),
+           *pRight = RightOperand();
+    assert(pLeft);
+    assert(pOper);
+    assert(pRight);
+
+    pOper->SetSize(Fraction (rFormat.GetRelSize(SIZ_OPERATOR), 100));
+
+    pLeft ->Arrange(rDev, rFormat);
+    pOper ->Arrange(rDev, rFormat);
+    pRight->Arrange(rDev, rFormat);
+
+    const SmRect &rOpRect = pOper->GetRect();
+
+    tools::Long nMul;
+    if (o3tl::checked_multiply<tools::Long>(rOpRect.GetWidth(), rFormat.GetDistance(DIS_HORIZONTAL), nMul))
+    {
+        SAL_WARN("starmath", "integer overflow");
+        return;
+    }
+
+    tools::Long nDist = nMul / 100;
+
+    SmRect::operator = (*pLeft);
+
+    Point aPos;
+    aPos = pOper->AlignTo(*this, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+    aPos.AdjustX(nDist );
+    pOper->MoveTo(aPos);
+    ExtendBy(*pOper, RectCopyMBL::Xor);
+
+    aPos = pRight->AlignTo(*this, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+    aPos.AdjustX(nDist );
+
+    pRight->MoveTo(aPos);
+    ExtendBy(*pRight, RectCopyMBL::Xor);
+}
+
+
+/**************************************************************************/
+
+
+void SmBinVerNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pNum   = GetSubNode(0),
+           *pLine  = GetSubNode(1),
+           *pDenom = GetSubNode(2);
+    assert(pNum);
+    assert(pLine);
+    assert(pDenom);
+
+    bool  bIsTextmode = rFormat.IsTextmode();
+    if (bIsTextmode)
+    {
+        Fraction  aFraction(rFormat.GetRelSize(SIZ_INDEX), 100);
+        pNum  ->SetSize(aFraction);
+        pLine ->SetSize(aFraction);
+        pDenom->SetSize(aFraction);
+    }
+
+    pNum  ->Arrange(rDev, rFormat);
+    pDenom->Arrange(rDev, rFormat);
+
+    tools::Long  nFontHeight = GetFont().GetFontSize().Height(),
+          nExtLen     = nFontHeight * rFormat.GetDistance(DIS_FRACTION) / 100,
+          nThick      = nFontHeight * rFormat.GetDistance(DIS_STROKEWIDTH) / 100,
+          nWidth      = std::max(pNum->GetItalicWidth(), pDenom->GetItalicWidth()),
+          nNumDist    = bIsTextmode ? 0 :
+                            nFontHeight * rFormat.GetDistance(DIS_NUMERATOR)   / 100,
+          nDenomDist  = bIsTextmode ? 0 :
+                            nFontHeight * rFormat.GetDistance(DIS_DENOMINATOR) / 100;
+
+    // font specialist advised to change the width first
+    pLine->AdaptToY(rDev, nThick);
+    pLine->AdaptToX(rDev, nWidth + 2 * nExtLen);
+    pLine->Arrange(rDev, rFormat);
+
+    // get horizontal alignment for numerator
+    const SmNode *pLM       = pNum->GetLeftMost();
+    RectHorAlign  eHorAlign = pLM->GetRectHorAlign();
+
+    // move numerator to its position
+    Point  aPos = pNum->AlignTo(*pLine, RectPos::Top, eHorAlign, RectVerAlign::Baseline);
+    aPos.AdjustY( -nNumDist );
+    pNum->MoveTo(aPos);
+
+    // get horizontal alignment for denominator
+    pLM       = pDenom->GetLeftMost();
+    eHorAlign = pLM->GetRectHorAlign();
+
+    // move denominator to its position
+    aPos = pDenom->AlignTo(*pLine, RectPos::Bottom, eHorAlign, RectVerAlign::Baseline);
+    aPos.AdjustY(nDenomDist );
+    pDenom->MoveTo(aPos);
+
+    SmRect::operator = (*pNum);
+    ExtendBy(*pDenom, RectCopyMBL::None).ExtendBy(*pLine, RectCopyMBL::None, pLine->GetCenterY());
+}
+
+const SmNode * SmBinVerNode::GetLeftMost() const
+{
+    return this;
+}
+
+
+namespace {
+
+/// @return value of the determinant formed by the two points
+double Det(const Point &rHeading1, const Point &rHeading2)
+{
+    return rHeading1.X() * rHeading2.Y() - rHeading1.Y() * rHeading2.X();
+}
+
+
+/// Is true iff the point 'rPoint1' belongs to the straight line through 'rPoint2'
+/// and has the direction vector 'rHeading2'
+bool IsPointInLine(const Point &rPoint1,
+                   const Point &rPoint2, const Point &rHeading2)
+{
+    assert(rHeading2 != Point());
+
+    bool bRes = false;
+    static const double eps = 5.0 * DBL_EPSILON;
+
+    double fLambda;
+    if (std::abs(rHeading2.X()) > std::abs(rHeading2.Y()))
+    {
+        fLambda = (rPoint1.X() - rPoint2.X()) / static_cast<double>(rHeading2.X());
+        bRes = fabs(rPoint1.Y() - (rPoint2.Y() + fLambda * rHeading2.Y())) < eps;
+    }
+    else
+    {
+        fLambda = (rPoint1.Y() - rPoint2.Y()) / static_cast<double>(rHeading2.Y());
+        bRes = fabs(rPoint1.X() - (rPoint2.X() + fLambda * rHeading2.X())) < eps;
+    }
+
+    return bRes;
+}
+
+
+sal_uInt16 GetLineIntersectionPoint(Point &rResult,
+                                const Point& rPoint1, const Point &rHeading1,
+                                const Point& rPoint2, const Point &rHeading2)
+{
+    assert(rHeading1 != Point());
+    assert(rHeading2 != Point());
+
+    sal_uInt16 nRes = 1;
+    static const double eps = 5.0 * DBL_EPSILON;
+
+    // are the direction vectors linearly dependent?
+    double  fDet = Det(rHeading1, rHeading2);
+    if (fabs(fDet) < eps)
+    {
+        nRes    = IsPointInLine(rPoint1, rPoint2, rHeading2) ? USHRT_MAX : 0;
+        rResult = nRes ? rPoint1 : Point();
+    }
+    else
+    {
+        // here we do not pay attention to the computational accuracy
+        // (that would be more complicated and is not really worth it in this case)
+        double fLambda = (    (rPoint1.Y() - rPoint2.Y()) * rHeading2.X()
+                            - (rPoint1.X() - rPoint2.X()) * rHeading2.Y())
+                         / fDet;
+        rResult = Point(rPoint1.X() + static_cast<tools::Long>(fLambda * rHeading1.X()),
+                        rPoint1.Y() + static_cast<tools::Long>(fLambda * rHeading1.Y()));
+    }
+
+    return nRes;
+}
+
+}
+
+
+/// @return position and size of the diagonal line
+/// premise: SmRect of the node defines the limitation(!) consequently it has to be known upfront
+void SmBinDiagonalNode::GetOperPosSize(Point &rPos, Size &rSize,
+                        const Point &rDiagPoint, double fAngleDeg) const
+
+{
+    double  fAngleRad   = basegfx::deg2rad(fAngleDeg);
+    tools::Long    nRectLeft   = GetItalicLeft(),
+            nRectRight  = GetItalicRight(),
+            nRectTop    = GetTop(),
+            nRectBottom = GetBottom();
+    Point   aRightHdg     (100, 0),
+            aDownHdg      (0, 100),
+            aDiagHdg      ( static_cast<tools::Long>(100.0 * cos(fAngleRad)),
+                            static_cast<tools::Long>(-100.0 * sin(fAngleRad)) );
+
+    tools::Long  nLeft, nRight, nTop, nBottom;     // margins of the rectangle for the diagonal
+    Point aPoint;
+    if (IsAscending())
+    {
+        // determine top right corner
+        GetLineIntersectionPoint(aPoint,
+            Point(nRectLeft, nRectTop), aRightHdg,
+            rDiagPoint, aDiagHdg);
+        // is there a point of intersection with the top border?
+        if (aPoint.X() <= nRectRight)
+        {
+            nRight = aPoint.X();
+            nTop   = nRectTop;
+        }
+        else
+        {
+            // there has to be a point of intersection with the right border!
+            GetLineIntersectionPoint(aPoint,
+                Point(nRectRight, nRectTop), aDownHdg,
+                rDiagPoint, aDiagHdg);
+
+            nRight = nRectRight;
+            nTop   = aPoint.Y();
+        }
+
+        // determine bottom left corner
+        GetLineIntersectionPoint(aPoint,
+            Point(nRectLeft, nRectBottom), aRightHdg,
+            rDiagPoint, aDiagHdg);
+        // is there a point of intersection with the bottom border?
+        if (aPoint.X() >= nRectLeft)
+        {
+            nLeft   = aPoint.X();
+            nBottom = nRectBottom;
+        }
+        else
+        {
+            // there has to be a point of intersection with the left border!
+            GetLineIntersectionPoint(aPoint,
+                Point(nRectLeft, nRectTop), aDownHdg,
+                rDiagPoint, aDiagHdg);
+
+            nLeft   = nRectLeft;
+            nBottom = aPoint.Y();
+        }
+    }
+    else
+    {
+        // determine top left corner
+        GetLineIntersectionPoint(aPoint,
+            Point(nRectLeft, nRectTop), aRightHdg,
+            rDiagPoint, aDiagHdg);
+        // is there a point of intersection with the top border?
+        if (aPoint.X() >= nRectLeft)
+        {
+            nLeft = aPoint.X();
+            nTop  = nRectTop;
+        }
+        else
+        {
+            // there has to be a point of intersection with the left border!
+            GetLineIntersectionPoint(aPoint,
+                Point(nRectLeft, nRectTop), aDownHdg,
+                rDiagPoint, aDiagHdg);
+
+            nLeft = nRectLeft;
+            nTop  = aPoint.Y();
+        }
+
+        // determine bottom right corner
+        GetLineIntersectionPoint(aPoint,
+            Point(nRectLeft, nRectBottom), aRightHdg,
+            rDiagPoint, aDiagHdg);
+        // is there a point of intersection with the bottom border?
+        if (aPoint.X() <= nRectRight)
+        {
+            nRight  = aPoint.X();
+            nBottom = nRectBottom;
+        }
+        else
+        {
+            // there has to be a point of intersection with the right border!
+            GetLineIntersectionPoint(aPoint,
+                Point(nRectRight, nRectTop), aDownHdg,
+                rDiagPoint, aDiagHdg);
+
+            nRight  = nRectRight;
+            nBottom = aPoint.Y();
+        }
+    }
+
+    rSize = Size(nRight - nLeft + 1, nBottom - nTop + 1);
+    rPos.setX( nLeft );
+    rPos.setY( nTop );
+}
+
+
+void SmBinDiagonalNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    // Both arguments have to get into the SubNodes before the Operator so that clicking
+    // within the GraphicWindow sets the FormulaCursor correctly (cf. SmRootNode)
+    SmNode *pLeft  = GetSubNode(0),
+           *pRight = GetSubNode(1),
+           *pLine  = GetSubNode(2);
+    assert(pLeft);
+    assert(pRight);
+    assert(pLine && pLine->GetType() == SmNodeType::PolyLine);
+
+    SmPolyLineNode *pOper = static_cast<SmPolyLineNode *>(pLine);
+    assert(pOper);
+
+    //! some routines being called extract some info from the OutputDevice's
+    //! font (eg the space to be used for borders OR the font name(!!)).
+    //! Thus the font should reflect the needs and has to be set!
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    pLeft->Arrange(aTmpDev, rFormat);
+    pRight->Arrange(aTmpDev, rFormat);
+
+    // determine implicitly the values (incl. the margin) of the diagonal line
+    pOper->Arrange(aTmpDev, rFormat);
+
+    tools::Long nDelta = pOper->GetWidth() * 8 / 10;
+
+    // determine TopLeft position from the right argument
+    Point aPos;
+    aPos.setX( pLeft->GetItalicRight() + nDelta + pRight->GetItalicLeftSpace() );
+    if (IsAscending())
+        aPos.setY( pLeft->GetBottom() + nDelta );
+    else
+        aPos.setY( pLeft->GetTop() - nDelta - pRight->GetHeight() );
+
+    pRight->MoveTo(aPos);
+
+    // determine new baseline
+    tools::Long nTmpBaseline = IsAscending() ? (pLeft->GetBottom() + pRight->GetTop()) / 2
+                        : (pLeft->GetTop() + pRight->GetBottom()) / 2;
+    Point  aLogCenter ((pLeft->GetItalicRight() + pRight->GetItalicLeft()) / 2,
+                       nTmpBaseline);
+
+    SmRect::operator = (*pLeft);
+    ExtendBy(*pRight, RectCopyMBL::None);
+
+
+    // determine position and size of diagonal line
+    Size  aTmpSize;
+    GetOperPosSize(aPos, aTmpSize, aLogCenter, IsAscending() ? 60.0 : -60.0);
+
+    // font specialist advised to change the width first
+    pOper->AdaptToY(aTmpDev, aTmpSize.Height());
+    pOper->AdaptToX(aTmpDev, aTmpSize.Width());
+    // and make it active
+    pOper->Arrange(aTmpDev, rFormat);
+
+    pOper->MoveTo(aPos);
+
+    ExtendBy(*pOper, RectCopyMBL::None, nTmpBaseline);
+}
+
+
+/**************************************************************************/
+
+
+void SmSubSupNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    OSL_ENSURE(GetNumSubNodes() == 1 + SUBSUP_NUM_ENTRIES,
+               "Sm: wrong number of subnodes");
+
+    SmNode *pBody = GetBody();
+    assert(pBody);
+
+    tools::Long  nOrigHeight = pBody->GetFont().GetFontSize().Height();
+
+    pBody->Arrange(rDev, rFormat);
+
+    const SmRect &rBodyRect = pBody->GetRect();
+    SmRect::operator = (rBodyRect);
+
+    // line that separates sub- and supscript rectangles
+    tools::Long  nDelimLine = SmFromTo(GetAlignB(), GetAlignT(), 0.4);
+
+    Point  aPos;
+    tools::Long   nDelta, nDist;
+
+    // iterate over all possible sub-/supscripts
+    SmRect  aTmpRect (rBodyRect);
+    for (int i = 0;  i < SUBSUP_NUM_ENTRIES;  i++)
+    {
+        SmSubSup eSubSup = static_cast<SmSubSup>(i);
+        SmNode *pSubSup = GetSubSup(eSubSup);
+
+        if (!pSubSup)
+            continue;
+
+        // switch position of limits if we are in textmode
+        if (rFormat.IsTextmode()  &&  (GetToken().nGroup & TG::Limit))
+            switch (eSubSup)
+            {   case CSUB:  eSubSup = RSUB;     break;
+                case CSUP:  eSubSup = RSUP;     break;
+                default:
+                    break;
+            }
+
+        // prevent sub-/supscripts from diminishing in size
+        // (as would be in "a_{1_{2_{3_4}}}")
+        if (GetFont().GetFontSize().Height() > rFormat.GetBaseSize().Height() / 3)
+        {
+            sal_uInt16 nIndex = (eSubSup == CSUB  ||  eSubSup == CSUP) ?
+                                    SIZ_LIMITS : SIZ_INDEX;
+            Fraction  aFraction ( rFormat.GetRelSize(nIndex), 100 );
+            pSubSup->SetSize(aFraction);
+        }
+
+        pSubSup->Arrange(rDev, rFormat);
+
+        bool  bIsTextmode = rFormat.IsTextmode();
+        nDist = 0;
+
+        //! be sure that CSUB, CSUP are handled before the other cases!
+        switch (eSubSup)
+        {   case RSUB :
+            case LSUB :
+                if (!bIsTextmode)
+                    nDist = nOrigHeight
+                            * rFormat.GetDistance(DIS_SUBSCRIPT) / 100;
+                aPos  = pSubSup->GetRect().AlignTo(aTmpRect,
+                                eSubSup == LSUB ? RectPos::Left : RectPos::Right,
+                                RectHorAlign::Center, RectVerAlign::Bottom);
+                aPos.AdjustY(nDist );
+                nDelta = nDelimLine - aPos.Y();
+                if (nDelta > 0)
+                    aPos.AdjustY(nDelta );
+                break;
+            case RSUP :
+            case LSUP :
+                if (!bIsTextmode)
+                    nDist = nOrigHeight
+                            * rFormat.GetDistance(DIS_SUPERSCRIPT) / 100;
+                aPos  = pSubSup->GetRect().AlignTo(aTmpRect,
+                                eSubSup == LSUP ? RectPos::Left : RectPos::Right,
+                                RectHorAlign::Center, RectVerAlign::Top);
+                aPos.AdjustY( -nDist );
+                nDelta = aPos.Y() + pSubSup->GetHeight() - nDelimLine;
+                if (nDelta > 0)
+                    aPos.AdjustY( -nDelta );
+                break;
+            case CSUB :
+                if (!bIsTextmode)
+                    nDist = nOrigHeight
+                            * rFormat.GetDistance(DIS_LOWERLIMIT) / 100;
+                aPos = pSubSup->GetRect().AlignTo(rBodyRect, RectPos::Bottom,
+                                RectHorAlign::Center, RectVerAlign::Baseline);
+                aPos.AdjustY(nDist );
+                break;
+            case CSUP :
+                if (!bIsTextmode)
+                    nDist = nOrigHeight
+                            * rFormat.GetDistance(DIS_UPPERLIMIT) / 100;
+                aPos = pSubSup->GetRect().AlignTo(rBodyRect, RectPos::Top,
+                                RectHorAlign::Center, RectVerAlign::Baseline);
+                aPos.AdjustY( -nDist );
+                break;
+        }
+
+        pSubSup->MoveTo(aPos);
+        ExtendBy(*pSubSup, RectCopyMBL::This, true);
+
+        // update rectangle to which  RSUB, RSUP, LSUB, LSUP
+        // will be aligned to
+        if (eSubSup == CSUB  ||  eSubSup == CSUP)
+            aTmpRect = *this;
+    }
+}
+
+/**************************************************************************/
+
+void SmBraceNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pLeft  = OpeningBrace(),
+           *pBody  = Body(),
+           *pRight = ClosingBrace();
+    assert(pLeft);
+    assert(pBody);
+    assert(pRight);
+
+    pBody->Arrange(rDev, rFormat);
+
+    bool  bIsScaleNormal = rFormat.IsScaleNormalBrackets(),
+          bScale         = pBody->GetHeight() > 0  &&
+                           (GetScaleMode() == SmScaleMode::Height  ||  bIsScaleNormal),
+          bIsABS         = GetToken().eType == TABS;
+
+    tools::Long  nFaceHeight = GetFont().GetFontSize().Height();
+
+    // determine oversize in %
+    sal_uInt16  nPerc = 0;
+    if (!bIsABS && bScale)
+    {   // in case of oversize braces...
+        sal_uInt16 nIndex = GetScaleMode() == SmScaleMode::Height ?
+                            DIS_BRACKETSIZE : DIS_NORMALBRACKETSIZE;
+        nPerc = rFormat.GetDistance(nIndex);
+    }
+
+    // determine the height for the braces
+    tools::Long  nBraceHeight;
+    if (bScale)
+    {
+        nBraceHeight = pBody->GetType() == SmNodeType::Bracebody ?
+                              static_cast<SmBracebodyNode *>(pBody)->GetBodyHeight()
+                            : pBody->GetHeight();
+        nBraceHeight += 2 * (nBraceHeight * nPerc / 100);
+    }
+    else
+        nBraceHeight = nFaceHeight;
+
+    // distance to the argument
+    nPerc = bIsABS ? 0 : rFormat.GetDistance(DIS_BRACKETSPACE);
+    tools::Long  nDist = nFaceHeight * nPerc / 100;
+
+    // if wanted, scale the braces to the wanted size
+    if (bScale)
+    {
+        Size  aTmpSize (pLeft->GetFont().GetFontSize());
+        OSL_ENSURE(pRight->GetFont().GetFontSize() == aTmpSize,
+                    "Sm : different font sizes");
+        aTmpSize.setWidth( std::min(nBraceHeight * 60 / 100,
+                            rFormat.GetBaseSize().Height() * 3 / 2) );
+        // correction factor since change from StarMath to OpenSymbol font
+        // because of the different font width in the FontMetric
+        aTmpSize.setWidth( aTmpSize.Width() * 182 );
+        aTmpSize.setWidth( aTmpSize.Width() / 267 );
+
+        sal_Unicode cChar = pLeft->GetToken().cMathChar[0];
+        if (cChar != MS_LINE  &&  cChar != MS_DLINE &&
+            cChar != MS_VERTLINE  &&  cChar != MS_DVERTLINE)
+            pLeft ->GetFont().SetSize(aTmpSize);
+
+        cChar = pRight->GetToken().cMathChar[0];
+        if (cChar != MS_LINE  &&  cChar != MS_DLINE &&
+            cChar != MS_VERTLINE  &&  cChar != MS_DVERTLINE)
+            pRight->GetFont().SetSize(aTmpSize);
+
+        pLeft ->AdaptToY(rDev, nBraceHeight);
+        pRight->AdaptToY(rDev, nBraceHeight);
+    }
+
+    pLeft ->Arrange(rDev, rFormat);
+    pRight->Arrange(rDev, rFormat);
+
+    // required in order to make "\(a\) - (a) - left ( a right )" look alright
+    RectVerAlign  eVerAlign = bScale ? RectVerAlign::CenterY : RectVerAlign::Baseline;
+
+    Point         aPos;
+    aPos = pLeft->AlignTo(*pBody, RectPos::Left, RectHorAlign::Center, eVerAlign);
+    aPos.AdjustX( -nDist );
+    pLeft->MoveTo(aPos);
+
+    aPos = pRight->AlignTo(*pBody, RectPos::Right, RectHorAlign::Center, eVerAlign);
+    aPos.AdjustX(nDist );
+    pRight->MoveTo(aPos);
+
+    SmRect::operator = (*pBody);
+    ExtendBy(*pLeft, RectCopyMBL::This).ExtendBy(*pRight, RectCopyMBL::This);
+}
+
+
+/**************************************************************************/
+
+
+void SmBracebodyNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    size_t nNumSubNodes = GetNumSubNodes();
+    if (nNumSubNodes == 0)
+        return;
+
+    // arrange arguments
+    for (size_t i = 0;  i < nNumSubNodes; i += 2)
+        GetSubNode(i)->Arrange(rDev, rFormat);
+
+    // build reference rectangle with necessary info for vertical alignment
+    SmRect  aRefRect (*GetSubNode(0));
+    for (size_t i = 0;  i < nNumSubNodes; i += 2)
+    {
+        SmRect aTmpRect (*GetSubNode(i));
+        Point  aPos = aTmpRect.AlignTo(aRefRect, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+        aTmpRect.MoveTo(aPos);
+        aRefRect.ExtendBy(aTmpRect, RectCopyMBL::Xor);
+    }
+
+    mnBodyHeight = aRefRect.GetHeight();
+
+    // scale separators to required height and arrange them
+    bool bScale  = GetScaleMode() == SmScaleMode::Height  ||  rFormat.IsScaleNormalBrackets();
+    tools::Long nHeight = bScale ? aRefRect.GetHeight() : GetFont().GetFontSize().Height();
+    sal_uInt16 nIndex  = GetScaleMode() == SmScaleMode::Height ?
+                        DIS_BRACKETSIZE : DIS_NORMALBRACKETSIZE;
+    sal_uInt16 nPerc   = rFormat.GetDistance(nIndex);
+    if (bScale)
+        nHeight += 2 * (nHeight * nPerc / 100);
+    for (size_t i = 1; i < nNumSubNodes; i += 2)
+    {
+        SmNode *pNode = GetSubNode(i);
+        pNode->AdaptToY(rDev, nHeight);
+        pNode->Arrange(rDev, rFormat);
+    }
+
+    // horizontal distance between argument and brackets or separators
+    tools::Long  nDist = GetFont().GetFontSize().Height()
+                  * rFormat.GetDistance(DIS_BRACKETSPACE) / 100;
+
+    SmNode *pLeft = GetSubNode(0);
+    SmRect::operator = (*pLeft);
+    for (size_t i = 1; i < nNumSubNodes; ++i)
+    {
+        bool          bIsSeparator = i % 2 != 0;
+        RectVerAlign  eVerAlign    = bIsSeparator ? RectVerAlign::CenterY : RectVerAlign::Baseline;
+
+        SmNode *pRight = GetSubNode(i);
+        Point  aPosX = pRight->AlignTo(*pLeft,   RectPos::Right, RectHorAlign::Center, eVerAlign),
+               aPosY = pRight->AlignTo(aRefRect, RectPos::Right, RectHorAlign::Center, eVerAlign);
+        aPosX.AdjustX(nDist );
+
+        pRight->MoveTo(Point(aPosX.X(), aPosY.Y()));
+        ExtendBy(*pRight, bIsSeparator ? RectCopyMBL::This : RectCopyMBL::Xor);
+
+        pLeft = pRight;
+    }
+}
+
+
+/**************************************************************************/
+
+
+void SmVerticalBraceNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pBody   = Body(),
+           *pBrace  = Brace(),
+           *pScript = Script();
+    assert(pBody);
+    assert(pBrace);
+    assert(pScript);
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    pBody->Arrange(aTmpDev, rFormat);
+
+    // size is the same as for limits for this part
+    pScript->SetSize( Fraction( rFormat.GetRelSize(SIZ_LIMITS), 100 ) );
+    // braces are a bit taller than usually
+    pBrace ->SetSize( Fraction(3, 2) );
+
+    tools::Long  nItalicWidth = pBody->GetItalicWidth();
+    if (nItalicWidth > 0)
+        pBrace->AdaptToX(aTmpDev, nItalicWidth);
+
+    pBrace ->Arrange(aTmpDev, rFormat);
+    pScript->Arrange(aTmpDev, rFormat);
+
+    // determine the relative position and the distances between each other
+    RectPos  eRectPos;
+    tools::Long nFontHeight = pBody->GetFont().GetFontSize().Height();
+    tools::Long nDistBody   = nFontHeight * rFormat.GetDistance(DIS_ORNAMENTSIZE),
+         nDistScript = nFontHeight;
+    if (GetToken().eType == TOVERBRACE)
+    {
+        eRectPos = RectPos::Top;
+        nDistBody    = - nDistBody;
+        nDistScript *= - rFormat.GetDistance(DIS_UPPERLIMIT);
+    }
+    else // TUNDERBRACE
+    {
+        eRectPos = RectPos::Bottom;
+        nDistScript *= + rFormat.GetDistance(DIS_LOWERLIMIT);
+    }
+    nDistBody   /= 100;
+    nDistScript /= 100;
+
+    Point  aPos = pBrace->AlignTo(*pBody, eRectPos, RectHorAlign::Center, RectVerAlign::Baseline);
+    aPos.AdjustY(nDistBody );
+    pBrace->MoveTo(aPos);
+
+    aPos = pScript->AlignTo(*pBrace, eRectPos, RectHorAlign::Center, RectVerAlign::Baseline);
+    aPos.AdjustY(nDistScript );
+    pScript->MoveTo(aPos);
+
+    SmRect::operator = (*pBody);
+    ExtendBy(*pBrace, RectCopyMBL::This).ExtendBy(*pScript, RectCopyMBL::This);
+}
+
+
+/**************************************************************************/
+
+
+SmNode * SmOperNode::GetSymbol()
+{
+    SmNode *pNode = GetSubNode(0);
+    assert(pNode);
+
+    if (pNode->GetType() == SmNodeType::SubSup)
+        pNode = static_cast<SmSubSupNode *>(pNode)->GetBody();
+
+    OSL_ENSURE(pNode, "Sm: NULL pointer!");
+    return pNode;
+}
+
+
+tools::Long SmOperNode::CalcSymbolHeight(const SmNode &rSymbol,
+                                  const SmFormat &rFormat) const
+    // returns the font height to be used for operator-symbol
+{
+    tools::Long  nHeight = GetFont().GetFontSize().Height();
+
+    SmTokenType  eTmpType = GetToken().eType;
+    if (eTmpType == TLIM  ||  eTmpType == TLIMINF  ||  eTmpType == TLIMSUP)
+        return nHeight;
+
+    if (!rFormat.IsTextmode())
+    {
+        // set minimum size ()
+        nHeight += (nHeight * 20) / 100;
+
+        nHeight += nHeight
+                   * rFormat.GetDistance(DIS_OPERATORSIZE) / 100;
+        nHeight = nHeight * 686 / 845;
+    }
+
+    // correct user-defined symbols to match height of sum from used font
+    if (rSymbol.GetToken().eType == TSPECIAL)
+        nHeight = nHeight * 845 / 686;
+
+    return nHeight;
+}
+
+
+void SmOperNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pOper = GetSubNode(0);
+    SmNode *pBody = GetSubNode(1);
+
+    assert(pOper);
+    assert(pBody);
+
+    SmNode *pSymbol = GetSymbol();
+    pSymbol->SetSize(Fraction(CalcSymbolHeight(*pSymbol, rFormat),
+                              pSymbol->GetFont().GetFontSize().Height()));
+
+    pBody->Arrange(rDev, rFormat);
+    bool bDynamicallySized = false;
+    if (pSymbol->GetToken().eType == TINTD)
+    {
+        tools::Long nBodyHeight = pBody->GetHeight();
+        tools::Long nFontHeight = pSymbol->GetFont().GetFontSize().Height();
+        if (nFontHeight < nBodyHeight)
+        {
+            pSymbol->SetSize(Fraction(nBodyHeight, nFontHeight));
+            bDynamicallySized = true;
+        }
+    }
+    pOper->Arrange(rDev, rFormat);
+
+    tools::Long  nOrigHeight = GetFont().GetFontSize().Height(),
+          nDist = nOrigHeight
+                  * rFormat.GetDistance(DIS_OPERATORSPACE) / 100;
+
+    Point aPos = pOper->AlignTo(*pBody, RectPos::Left, RectHorAlign::Center, bDynamicallySized ? RectVerAlign::CenterY : RectVerAlign::Mid);
+    aPos.AdjustX( -nDist );
+    pOper->MoveTo(aPos);
+
+    SmRect::operator = (*pBody);
+    ExtendBy(*pOper, RectCopyMBL::This);
+}
+
+
+/**************************************************************************/
+
+
+void SmAlignNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+    // set alignment within the entire subtree (including current node)
+{
+    assert(GetNumSubNodes() == 1);
+
+    SmNode  *pNode = GetSubNode(0);
+    assert(pNode);
+
+    RectHorAlign  eHorAlign = RectHorAlign::Center;
+    switch (GetToken().eType)
+    {
+        case TALIGNL:   eHorAlign = RectHorAlign::Left;   break;
+        case TALIGNC:   eHorAlign = RectHorAlign::Center; break;
+        case TALIGNR:   eHorAlign = RectHorAlign::Right;  break;
+        default:
+            break;
+    }
+    SetRectHorAlign(eHorAlign);
+
+    pNode->Arrange(rDev, rFormat);
+
+    SmRect::operator = (pNode->GetRect());
+}
+
+
+/**************************************************************************/
+
+
+void SmAttributeNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pAttr = Attribute(),
+           *pBody = Body();
+    assert(pBody);
+    assert(pAttr);
+
+    pBody->Arrange(rDev, rFormat);
+
+    if (GetScaleMode() == SmScaleMode::Width)
+        pAttr->AdaptToX(rDev, pBody->GetItalicWidth());
+    pAttr->Arrange(rDev, rFormat);
+
+    // get relative position of attribute
+    RectVerAlign  eVerAlign;
+    tools::Long          nDist = 0;
+    switch (GetToken().eType)
+    {   case TUNDERLINE :
+            eVerAlign = RectVerAlign::AttributeLo;
+            break;
+        case TOVERSTRIKE :
+            eVerAlign = RectVerAlign::AttributeMid;
+            break;
+        default :
+            eVerAlign = RectVerAlign::AttributeHi;
+            if (pBody->GetType() == SmNodeType::Attribute)
+                nDist = GetFont().GetFontSize().Height()
+                        * rFormat.GetDistance(DIS_ORNAMENTSPACE) / 100;
+    }
+    Point  aPos = pAttr->AlignTo(*pBody, RectPos::Attribute, RectHorAlign::Center, eVerAlign);
+    aPos.AdjustY( -nDist );
+    pAttr->MoveTo(aPos);
+
+    SmRect::operator = (*pBody);
+    ExtendBy(*pAttr, RectCopyMBL::This, true);
+}
+
+void SmFontNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    //! prepare subnodes first
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    int  nFnt = -1;
+    switch (GetToken().eType)
+    {
+        case TFIXED:    nFnt = FNT_FIXED;   break;
+        case TSANS:     nFnt = FNT_SANS;    break;
+        case TSERIF:    nFnt = FNT_SERIF;   break;
+        default:
+            break;
+    }
+    if (nFnt != -1)
+    {   GetFont() = rFormat.GetFont( sal::static_int_cast< sal_uInt16 >(nFnt) );
+        SetFont(GetFont());
+    }
+
+    //! prevent overwrites of this font by 'Arrange' or 'SetFont' calls of
+    //! other font nodes (those with lower depth in the tree)
+    Flags() |= FontChangeMask::Face;
+}
+
+void SmFontNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pNode = GetSubNode(1);
+    assert(pNode);
+    sal_uInt32 nc;
+
+    switch (GetToken().eType)
+    {   case TSIZE :
+            pNode->SetFontSize(maFontSize, meSizeType);
+            break;
+        case TSANS :
+        case TSERIF :
+        case TFIXED :
+            pNode->SetFont(GetFont());
+            break;
+        case TUNKNOWN : break;  // no assertion on "font <?> <?>"
+
+        case TPHANTOM : SetPhantom(true);               break;
+        case TBOLD :    SetAttribute(FontAttribute::Bold);     break;
+        case TITALIC :  SetAttribute(FontAttribute::Italic);   break;
+        case TNBOLD :   ClearAttribute(FontAttribute::Bold);   break;
+        case TNITALIC : ClearAttribute(FontAttribute::Italic); break;
+
+        // Using HTML CSS Level 1 standard
+        case TRGB :
+        case TRGBA :
+        case THTMLCOL :
+        case TMATHMLCOL :
+        case TDVIPSNAMESCOL:
+        case TICONICCOL :
+        case THEX :
+            nc = GetToken().cMathChar.toUInt32(16);
+            SetColor(Color(ColorTransparency, nc));
+            break;
+
+        default:
+            SAL_WARN("starmath", "unknown case");
+    }
+
+    pNode->Arrange(rDev, rFormat);
+
+    SmRect::operator = (pNode->GetRect());
+}
+
+/**************************************************************************/
+
+
+SmPolyLineNode::SmPolyLineNode(const SmToken &rNodeToken)
+    : SmGraphicNode(SmNodeType::PolyLine, rNodeToken)
+    , maPoly(2)
+    , mnWidth(0)
+{
+}
+
+
+void SmPolyLineNode::AdaptToX(OutputDevice &/*rDev*/, sal_uLong nNewWidth)
+{
+    maToSize.setWidth( nNewWidth );
+}
+
+
+void SmPolyLineNode::AdaptToY(OutputDevice &/*rDev*/, sal_uLong nNewHeight)
+{
+    GetFont().FreezeBorderWidth();
+    maToSize.setHeight( nNewHeight );
+}
+
+
+void SmPolyLineNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    //! some routines being called extract some info from the OutputDevice's
+    //! font (eg the space to be used for borders OR the font name(!!)).
+    //! Thus the font should reflect the needs and has to be set!
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    tools::Long  nBorderwidth = GetFont().GetBorderWidth();
+
+    // create polygon using both endpoints
+    assert(maPoly.GetSize() == 2);
+    Point  aPointA, aPointB;
+    if (GetToken().eType == TWIDESLASH)
+    {
+        aPointA.setX( nBorderwidth );
+        aPointA.setY( maToSize.Height() - nBorderwidth );
+        aPointB.setX( maToSize.Width() - nBorderwidth );
+        aPointB.setY( nBorderwidth );
+    }
+    else
+    {
+        OSL_ENSURE(GetToken().eType == TWIDEBACKSLASH, "Sm : unexpected token");
+        aPointA.setX( nBorderwidth );
+        aPointA.setY( nBorderwidth );
+        aPointB.setX( maToSize.Width() - nBorderwidth );
+        aPointB.setY( maToSize.Height() - nBorderwidth );
+    }
+    maPoly.SetPoint(aPointA, 0);
+    maPoly.SetPoint(aPointB, 1);
+
+    tools::Long  nThick       = GetFont().GetFontSize().Height()
+                            * rFormat.GetDistance(DIS_STROKEWIDTH) / 100;
+    mnWidth = nThick + 2 * nBorderwidth;
+
+    SmRect::operator = (SmRect(maToSize.Width(), maToSize.Height()));
+}
+
+
+/**************************************************************************/
+
+void SmRootSymbolNode::AdaptToX(OutputDevice &/*rDev*/, sal_uLong nWidth)
+{
+    mnBodyWidth = nWidth;
+}
+
+
+void SmRootSymbolNode::AdaptToY(OutputDevice &rDev, sal_uLong nHeight)
+{
+    // some additional length so that the horizontal
+    // bar will be positioned above the argument
+    SmMathSymbolNode::AdaptToY(rDev, nHeight + nHeight / 10);
+}
+
+
+/**************************************************************************/
+
+
+void SmRectangleNode::AdaptToX(OutputDevice &/*rDev*/, sal_uLong nWidth)
+{
+    maToSize.setWidth( nWidth );
+}
+
+
+void SmRectangleNode::AdaptToY(OutputDevice &/*rDev*/, sal_uLong nHeight)
+{
+    GetFont().FreezeBorderWidth();
+    maToSize.setHeight( nHeight );
+}
+
+
+void SmRectangleNode::Arrange(OutputDevice &rDev, const SmFormat &/*rFormat*/)
+{
+    tools::Long  nFontHeight = GetFont().GetFontSize().Height();
+    tools::Long  nWidth  = maToSize.Width(),
+          nHeight = maToSize.Height();
+    if (nHeight == 0)
+        nHeight = nFontHeight / 30;
+    if (nWidth == 0)
+        nWidth  = nFontHeight / 3;
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    // add some borderspace
+    sal_uLong  nTmpBorderWidth = GetFont().GetBorderWidth();
+    nHeight += 2 * nTmpBorderWidth;
+
+    //! use this method in order to have 'SmRect::HasAlignInfo() == true'
+    //! and thus having the attribute-fences updated in 'SmRect::ExtendBy'
+    SmRect::operator = (SmRect(nWidth, nHeight));
+}
+
+
+/**************************************************************************/
+
+
+SmTextNode::SmTextNode( SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 nFontDescP )
+    : SmVisibleNode(eNodeType, rNodeToken)
+    , mnFontDesc(nFontDescP)
+    , mnSelectionStart(0)
+    , mnSelectionEnd(0)
+{
+}
+
+SmTextNode::SmTextNode( const SmToken &rNodeToken, sal_uInt16 nFontDescP )
+    : SmVisibleNode(SmNodeType::Text, rNodeToken)
+    , mnFontDesc(nFontDescP)
+    , mnSelectionStart(0)
+    , mnSelectionEnd(0)
+{
+}
+
+void SmTextNode::ChangeText(const OUString &rText) {
+    maText = rText;
+    GetToken().aText = rText;
+    AdjustFontDesc();
+}
+
+void SmTextNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    // default setting for horizontal alignment of nodes with TTEXT
+    // content is as alignl (cannot be done in Arrange since it would
+    // override the settings made by an SmAlignNode before)
+    if (TTEXT == GetToken().eType)
+        SetRectHorAlign( RectHorAlign::Left );
+
+    maText = GetToken().aText;
+    GetFont() = rFormat.GetFont(GetFontDesc());
+
+    if (IsItalic( GetFont() ))
+        Attributes() |= FontAttribute::Italic;
+    if (IsBold( GetFont() ))
+        Attributes() |= FontAttribute::Bold;
+
+    // special handling for ':' where it is a token on its own and is likely
+    // to be used for mathematical notations. (E.g. a:b = 2:3)
+    // In that case it should not be displayed in italic.
+    if (maText.getLength() == 1 && GetToken().aText[0] == ':')
+        Attributes() &= ~FontAttribute::Italic;
+
+    // Arabic text should not be italic, so we check for any character in Arabic script and
+    // remove italic attribute.
+    if (!maText.isEmpty())
+    {
+        sal_Int32 nIndex = 0;
+        while (nIndex < maText.getLength())
+        {
+            sal_uInt32 cChar = maText.iterateCodePoints(&nIndex);
+            if (u_getIntPropertyValue(cChar, UCHAR_SCRIPT) == USCRIPT_ARABIC)
+            {
+                Attributes() &= ~FontAttribute::Italic;
+                break;
+            }
+        }
+    }
+};
+
+
+void SmTextNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    PrepareAttributes();
+
+    sal_uInt16  nSizeDesc = GetFontDesc() == FNT_FUNCTION ?
+                            SIZ_FUNCTION : SIZ_TEXT;
+    GetFont() *= Fraction (rFormat.GetRelSize(nSizeDesc), 100);
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, maText, GetFont().GetBorderWidth()));
+}
+
+void SmTextNode::GetAccessibleText( OUStringBuffer &rText ) const
+{
+    rText.append(maText);
+}
+
+void SmTextNode::AdjustFontDesc()
+{
+    if (GetToken().nGroup == TG::Function) mnFontDesc = FNT_FUNCTION;
+    else if (GetToken().eType == TTEXT) mnFontDesc = FNT_TEXT;
+    else {
+        sal_Unicode firstChar = maText[0];
+        if( ('0' <= firstChar && firstChar <= '9') || firstChar == '.' || firstChar == ',')
+            mnFontDesc = FNT_NUMBER;
+        else mnFontDesc = FNT_VARIABLE;
+    }
+}
+
+sal_Unicode SmTextNode::ConvertSymbolToUnicode(sal_Unicode nIn)
+{
+    //Find the best match in accepted unicode for our private area symbols
+    static const sal_Unicode aStarMathPrivateToUnicode[] =
+    {
+        0x2030, 0xF613, 0xF612, 0x002B, 0x003C, 0x003E, 0xE425, 0xE421, 0xE088, 0x2208,
+        0x0192, 0x2026, 0x2192, 0x221A, 0x221A, 0x221A, 0xE090, 0x005E, 0x02C7, 0x02D8,
+        0x00B4, 0x0060, 0x02DC, 0x00AF, 0x0362, 0xE099, 0xE09A, 0x20DB, 0xE09C, 0xE09D,
+        0x0028, 0x0029, 0x2220, 0x22AF, 0xE0A2, 0xE0A3, 0xE0A4, 0xE0A5, 0xE0A6, 0xE0A7,
+        0x002F, 0x005C, 0x274F, 0xE0AB, 0x0393, 0x0394, 0x0398, 0x039b, 0x039e, 0x03A0,
+        0x03a3, 0x03a5, 0x03a6, 0x03a8, 0x03A9, 0x03B1, 0x03B2, 0x03b3, 0x03b4, 0x03b5,
+        0x03b6, 0x03b7, 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
+        0x03c0, 0x03c1, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7, 0x03c8, 0x03c9, 0x03b5,
+        0x03d1, 0x03d6, 0xE0D2, 0x03db, 0x2118, 0x2202, 0x2129, 0xE0D7, 0xE0D8, 0x22A4,
+        0xE0DA, 0x2190, 0x2191, 0x2193
+    };
+    if ((nIn >= 0xE080) && (nIn <= 0xE0DD))
+        nIn = aStarMathPrivateToUnicode[nIn-0xE080];
+
+    //For whatever unicode glyph that equation editor doesn't ship with that
+    //we have a possible match we can munge it to.
+    switch (nIn)
+    {
+        case 0x2223:
+            nIn = '|';
+            break;
+        default:
+            break;
+    }
+
+    return nIn;
+}
+
+/**************************************************************************/
+
+void SmMatrixNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmNode *pNode;
+
+    // initialize array that is to hold the maximum widths of all
+    // elements (subnodes) in that column.
+    std::vector<tools::Long> aColWidth(mnNumCols);
+
+    // arrange subnodes and calculate the above arrays contents
+    size_t nNodes = GetNumSubNodes();
+    for (size_t i = 0; i < nNodes; ++i)
+    {
+        size_t nIdx = nNodes - 1 - i;
+        if (nullptr != (pNode = GetSubNode(nIdx)))
+        {
+            pNode->Arrange(rDev, rFormat);
+            int  nCol = nIdx % mnNumCols;
+            aColWidth[nCol] = std::max(aColWidth[nCol], pNode->GetItalicWidth());
+        }
+    }
+
+    // norm distance from which the following two are calculated
+    const tools::Long  nNormDist = 3 * GetFont().GetFontSize().Height();
+
+    // define horizontal and vertical minimal distances that separate
+    // the elements
+    tools::Long  nHorDist = nNormDist * rFormat.GetDistance(DIS_MATRIXCOL) / 100,
+          nVerDist = nNormDist * rFormat.GetDistance(DIS_MATRIXROW) / 100;
+
+    // build array that holds the leftmost position for each column
+    std::vector<tools::Long> aColLeft(mnNumCols);
+    tools::Long  nX = 0;
+    for (size_t j = 0; j < mnNumCols; ++j)
+    {
+        aColLeft[j] = nX;
+        nX += aColWidth[j] + nHorDist;
+    }
+
+    SmRect::operator = (SmRect());
+    for (size_t i = 0;  i < mnNumRows; ++i)
+    {
+        Point aPos;
+        SmRect aLineRect;
+        for (size_t j = 0;  j < mnNumCols; ++j)
+        {
+            SmNode *pTmpNode = GetSubNode(i * mnNumCols + j);
+            assert(pTmpNode);
+
+            const SmRect &rNodeRect = pTmpNode->GetRect();
+
+            // align all baselines in that row if possible
+            aPos = rNodeRect.AlignTo(aLineRect, RectPos::Right, RectHorAlign::Center, RectVerAlign::Baseline);
+
+            // get horizontal alignment
+            const SmNode *pCoNode   = pTmpNode->GetLeftMost();
+            RectHorAlign  eHorAlign = pCoNode->GetRectHorAlign();
+
+            // calculate horizontal position of element depending on column
+            // and horizontal alignment
+            switch (eHorAlign)
+            {   case RectHorAlign::Left:
+                    aPos.setX( aColLeft[j] );
+                    break;
+                case RectHorAlign::Center:
+                    aPos.setX( rNodeRect.GetLeft() + aColLeft[j]
+                               + aColWidth[j] / 2
+                               - rNodeRect.GetItalicCenterX() );
+                    break;
+                case RectHorAlign::Right:
+                    aPos.setX( aColLeft[j]
+                               + aColWidth[j] - rNodeRect.GetItalicWidth() );
+                    break;
+                default:
+                    assert(false);
+            }
+
+            pTmpNode->MoveTo(aPos);
+            aLineRect.ExtendBy(rNodeRect, RectCopyMBL::Xor);
+        }
+
+        aPos = aLineRect.AlignTo(*this, RectPos::Bottom, RectHorAlign::Center, RectVerAlign::Baseline);
+        if (i > 0)
+            aPos.AdjustY(nVerDist );
+
+        // move 'aLineRect' and rectangles in that line to final position
+        Point aDelta(0, // since horizontal alignment is already done
+                     aPos.Y() - aLineRect.GetTop());
+        aLineRect.Move(aDelta);
+        for (size_t j = 0;  j < mnNumCols; ++j)
+        {
+            if (nullptr != (pNode = GetSubNode(i * mnNumCols + j)))
+                pNode->Move(aDelta);
+        }
+
+        ExtendBy(aLineRect, RectCopyMBL::None);
+    }
+}
+
+const SmNode * SmMatrixNode::GetLeftMost() const
+{
+    return this;
+}
+
+
+/**************************************************************************/
+
+
+SmMathSymbolNode::SmMathSymbolNode(const SmToken &rNodeToken)
+:   SmSpecialNode(SmNodeType::Math, rNodeToken, FNT_MATH)
+{
+    SetText(GetToken().cMathChar);
+}
+
+void SmMathSymbolNode::AdaptToX(OutputDevice &rDev, sal_uLong nWidth)
+{
+    // Since there is no function to do this, we try to approximate it:
+    Size  aFntSize (GetFont().GetFontSize());
+
+    //! however the result is a bit better with 'nWidth' as initial font width
+    aFntSize.setWidth( nWidth );
+    GetFont().SetSize(aFntSize);
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    // get denominator of error factor for width
+    tools::Long nTmpBorderWidth = GetFont().GetBorderWidth();
+    tools::Long nDenom = SmRect(aTmpDev, nullptr, GetText(), nTmpBorderWidth).GetItalicWidth();
+
+    // scale fontwidth with this error factor
+    aFntSize.setWidth( aFntSize.Width() * nWidth );
+    aFntSize.setWidth( aFntSize.Width() / ( nDenom ? nDenom : 1) );
+
+    GetFont().SetSize(aFntSize);
+}
+
+void SmMathSymbolNode::AdaptToY(OutputDevice &rDev, sal_uLong nHeight)
+{
+    GetFont().FreezeBorderWidth();
+    Size  aFntSize (GetFont().GetFontSize());
+
+    // Since we only want to scale the height, we might have
+    // to determine the font width in order to keep it
+    if (aFntSize.Width() == 0)
+    {
+        rDev.Push(vcl::PushFlags::FONT | vcl::PushFlags::MAPMODE);
+        rDev.SetFont(GetFont());
+        aFntSize.setWidth( rDev.GetFontMetric().GetFontSize().Width() );
+        rDev.Pop();
+    }
+    OSL_ENSURE(aFntSize.Width() != 0, "Sm: ");
+
+    //! however the result is a bit better with 'nHeight' as initial
+    //! font height
+    aFntSize.setHeight( nHeight );
+    GetFont().SetSize(aFntSize);
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    // get denominator of error factor for height
+    tools::Long nTmpBorderWidth = GetFont().GetBorderWidth();
+    tools::Long nDenom = 0;
+    if (!GetText().isEmpty())
+        nDenom = SmRect(aTmpDev, nullptr, GetText(), nTmpBorderWidth).GetHeight();
+
+    // scale fontwidth with this error factor
+    aFntSize.setHeight( aFntSize.Height() * nHeight );
+    aFntSize.setHeight( aFntSize.Height() / ( nDenom ? nDenom : 1) );
+
+    GetFont().SetSize(aFntSize);
+}
+
+
+void SmMathSymbolNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    GetFont() = rFormat.GetFont(GetFontDesc());
+    // use same font size as is used for variables
+    GetFont().SetSize( rFormat.GetFont( FNT_VARIABLE ).GetFontSize() );
+
+    OSL_ENSURE(GetFont().GetCharSet() == RTL_TEXTENCODING_SYMBOL  ||
+               GetFont().GetCharSet() == RTL_TEXTENCODING_UNICODE,
+        "wrong charset for character from StarMath/OpenSymbol font");
+
+    Flags() |= FontChangeMask::Face | FontChangeMask::Italic;
+};
+
+
+void SmMathSymbolNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    const OUString &rText = GetText();
+
+    if (rText.isEmpty() || rText[0] == '\0')
+    {   SmRect::operator = (SmRect());
+        return;
+    }
+
+    PrepareAttributes();
+
+    GetFont() *= Fraction (rFormat.GetRelSize(SIZ_TEXT), 100);
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, rText, GetFont().GetBorderWidth()));
+}
+
+/**************************************************************************/
+
+SmSpecialNode::SmSpecialNode(SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 _nFontDesc)
+    : SmTextNode(eNodeType, rNodeToken, _nFontDesc)
+{
+}
+
+
+SmSpecialNode::SmSpecialNode(const SmToken &rNodeToken)
+    : SmTextNode(SmNodeType::Special, rNodeToken, FNT_VARIABLE)  // default Font isn't always correct!
+{
+}
+
+
+void SmSpecialNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    const SmSym   *pSym;
+    SmModule  *pp = SM_MOD();
+
+    bool bIsGreekSymbol = false;
+    bool bIsSpecialSymbol = false;
+    bool bIsArabic = false;
+
+    if (nullptr != (pSym = pp->GetSymbolManager().GetSymbolByName(GetToken().aText.subView(1))))
+    {
+        sal_UCS4 cChar = pSym->GetCharacter();
+        OUString aTmp( &cChar, 1 );
+        SetText( aTmp );
+        GetFont() = pSym->GetFace(&rFormat);
+
+        OUString aSymbolSetName = SmLocalizedSymbolData::GetExportSymbolSetName(pSym->GetSymbolSetName());
+        if (aSymbolSetName == "Greek")
+            bIsGreekSymbol = true;
+        else if (aSymbolSetName == "Special")
+            bIsSpecialSymbol = true;
+        else if (aSymbolSetName == "Arabic")
+            bIsArabic = true;
+    }
+    else
+    {
+        SetText( GetToken().aText );
+        GetFont() = rFormat.GetFont(FNT_VARIABLE);
+    }
+    // use same font size as is used for variables
+    GetFont().SetSize( rFormat.GetFont( FNT_VARIABLE ).GetFontSize() );
+
+    // Actually only WEIGHT_NORMAL and WEIGHT_BOLD should occur... However, the sms-file also
+    // contains e.g. 'WEIGHT_ULTRALIGHT'. Consequently, compare here with '>' instead of '!='.
+    // (In the long term the necessity for 'PrepareAttribut' and thus also for this here should be dropped)
+
+    //! see also SmFontStyles::GetStyleName
+    if (IsItalic( GetFont() ))
+        SetAttribute(FontAttribute::Italic);
+    if (IsBold( GetFont() ))
+        SetAttribute(FontAttribute::Bold);
+
+    Flags() |= FontChangeMask::Face;
+
+    sal_uInt32 cChar = 0;
+    if (!GetText().isEmpty())
+    {
+        sal_Int32 nIndex = 0;
+        cChar = GetText().iterateCodePoints(&nIndex);
+        if (!bIsArabic)
+            bIsArabic = u_getIntPropertyValue(cChar, UCHAR_SCRIPT) == USCRIPT_ARABIC;
+    }
+
+    if (!bIsGreekSymbol && !bIsSpecialSymbol && !bIsArabic)
+        return;
+
+    // Arabic and special symbols should not be italic,
+    // Greek is italic only in some cases.
+    bool bItalic = false;
+    if (bIsGreekSymbol)
+    {
+        sal_Int16 nStyle = rFormat.GetGreekCharStyle();
+        OSL_ENSURE( nStyle >= 0 && nStyle <= 2, "unexpected value for GreekCharStyle" );
+        if (nStyle == 1)
+            bItalic = true;
+        else if (nStyle == 2)
+        {
+            static const sal_Unicode cUppercaseAlpha = 0x0391;
+            static const sal_Unicode cUppercaseOmega = 0x03A9;
+            // uppercase letters should be straight and lowercase letters italic
+            bItalic = cUppercaseAlpha > cChar || cChar > cUppercaseOmega;
+        }
+    }
+
+    if (bItalic)
+        Attributes() |= FontAttribute::Italic;
+    else
+        Attributes() &= ~FontAttribute::Italic;
+};
+
+
+void SmSpecialNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    PrepareAttributes();
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, GetText(), GetFont().GetBorderWidth()));
+}
+
+/**************************************************************************/
+
+
+void SmGlyphSpecialNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    PrepareAttributes();
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, GetText(),
+                               GetFont().GetBorderWidth()).AsGlyphRect());
+}
+
+
+/**************************************************************************/
+
+
+void SmPlaceNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    GetFont().SetColor(COL_GRAY);
+    Flags() |= FontChangeMask::Color | FontChangeMask::Face | FontChangeMask::Italic;
+};
+
+
+void SmPlaceNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    PrepareAttributes();
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, GetText(), GetFont().GetBorderWidth()));
+}
+
+
+/**************************************************************************/
+
+
+void SmErrorNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    GetFont().SetColor(COL_RED);
+    Flags() |= FontChangeMask::Phantom | FontChangeMask::Bold | FontChangeMask::Italic
+               | FontChangeMask::Color | FontChangeMask::Face | FontChangeMask::Size;
+}
+
+
+void SmErrorNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    PrepareAttributes();
+
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    const OUString &rText = GetText();
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, rText, GetFont().GetBorderWidth()));
+}
+
+/**************************************************************************/
+
+void SmBlankNode::IncreaseBy(const SmToken &rToken, sal_uInt32 nMultiplyBy)
+{
+    switch(rToken.eType)
+    {
+        case TBLANK:  mnNum += (4 * nMultiplyBy); break;
+        case TSBLANK: mnNum += (1 * nMultiplyBy); break;
+        default:
+            break;
+    }
+}
+
+void SmBlankNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth)
+{
+    SmNode::Prepare(rFormat, rDocShell, nDepth);
+
+    // Here it need/should not be the StarMath font, so that for the character
+    // used in Arrange a normal (non-clipped) rectangle is generated
+    GetFont() = rFormat.GetFont(FNT_VARIABLE);
+
+    Flags() |= FontChangeMask::Face | FontChangeMask::Bold | FontChangeMask::Italic;
+}
+
+
+void SmBlankNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
+{
+    SmTmpDevice aTmpDev (rDev, true);
+    aTmpDev.SetFont(GetFont());
+
+    // make distance depend on the font height
+    // (so that it increases when scaling (e.g. size *2 {a ~ b})
+    tools::Long  nDist  = GetFont().GetFontSize().Height() / 10,
+          nSpace = mnNum * nDist;
+
+    // get a SmRect with Baseline and all the bells and whistles
+    SmRect::operator = (SmRect(aTmpDev, &rFormat, OUString(' '),
+                               GetFont().GetBorderWidth()));
+
+    // and resize it to the requested size
+    SetItalicSpaces(0, 0);
+    SetWidth(nSpace);
+}
+
+/**************************************************************************/
+//Implementation of all accept methods for SmVisitor
+
+void SmTableNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBraceNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBracebodyNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmOperNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmAlignNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmAttributeNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmFontNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmUnHorNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBinHorNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBinVerNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBinDiagonalNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmSubSupNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmMatrixNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmPlaceNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmTextNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmSpecialNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmGlyphSpecialNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmMathSymbolNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmBlankNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmErrorNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmLineNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmExpressionNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmPolyLineNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmRootNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmRootSymbolNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmRectangleNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+void SmVerticalBraceNode::Accept(SmVisitor* pVisitor) {
+    pVisitor->Visit(this);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */