xref: /trunk/main/starmath/inc/node.hxx (revision f6a9d5ca17e19b2857f1a47d10ddf4e3f0a53446)

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/




#ifndef NODE_HXX
#define NODE_HXX


#include <vector>

#include "parse.hxx"
#include "types.hxx"
#include "rect.hxx"
#include "format.hxx"


#define ATTR_BOLD       0x0001
#define ATTR_ITALIC     0x0002

#define FNTSIZ_ABSOLUT  1
#define FNTSIZ_PLUS     2
#define FNTSIZ_MINUS    3
#define FNTSIZ_MULTIPLY 4
#define FNTSIZ_DIVIDE   5

// flags to interdict respective status changes
#define FLG_FONT        0x0001
#define FLG_SIZE        0x0002
#define FLG_BOLD        0x0004
#define FLG_ITALIC      0x0008
#define FLG_COLOR       0x0010
#define FLG_VISIBLE     0x0020
#define FLG_HORALIGN    0x0040


extern SmFormat *pActiveFormat;

class SmDocShell;
class SmNode;
class SmStructureNode;

typedef std::vector< SmNode * > SmNodeArray;
typedef std::vector< SmStructureNode * > SmStructureNodeArray;


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

enum SmScaleMode    { SCALE_NONE, SCALE_WIDTH, SCALE_HEIGHT };

enum SmNodeType
{
    NTABLE,         NBRACE,         NBRACEBODY,     NOPER,          NALIGN,
    NATTRIBUT,      NFONT,          NUNHOR,         NBINHOR,        NBINVER,
    NBINDIAGONAL,   NSUBSUP,        NMATRIX,        NPLACE,         NTEXT,
    NSPECIAL,       NGLYPH_SPECIAL, NMATH,          NBLANK,         NERROR,
    NLINE,          NEXPRESSION,    NPOLYLINE,      NROOT,          NROOTSYMBOL,
    NRECTANGLE,     NVERTICAL_BRACE
};


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


class SmNode : public SmRect
{
    SmFace          aFace;

    SmToken         aNodeToken;
    SmNodeType      eType;
    SmScaleMode     eScaleMode;
    RectHorAlign    eRectHorAlign;
    sal_uInt16          nFlags,
                    nAttributes;
    sal_Bool            bIsPhantom,
                    bIsDebug;
protected:
    SmNode(SmNodeType eNodeType, const SmToken &rNodeToken);

    // index in accessible text -1 if not (yet) applicable
    sal_Int32       nAccIndex;

public:
    virtual             ~SmNode();

    virtual sal_Bool        IsVisible() const;

    virtual sal_uInt16      GetNumSubNodes() const;
    virtual SmNode *    GetSubNode(sal_uInt16 nIndex);
            const SmNode * GetSubNode(sal_uInt16 nIndex) const
            {
                return ((SmNode *) this)->GetSubNode(nIndex);
            }

    virtual SmNode *       GetLeftMost();
            const SmNode * GetLeftMost() const
            {
                return ((SmNode *) this)->GetLeftMost();
            }

            sal_uInt16 &    Flags() { return nFlags; }
            sal_uInt16 &    Attributes() { return nAttributes; }

            sal_Bool IsDebug() const { return bIsDebug; }
            sal_Bool IsPhantom() const { return bIsPhantom; }
            void SetPhantom(sal_Bool bIsPhantom);
            void SetColor(const Color &rColor);

            void SetAttribut(sal_uInt16 nAttrib);
            void ClearAttribut(sal_uInt16 nAttrib);

            const SmFace & GetFont() const { return aFace; };
                  SmFace & GetFont()       { return aFace; };

            void SetFont(const SmFace &rFace);
            void SetFontSize(const Fraction &rRelSize, sal_uInt16 nType);
            void SetSize(const Fraction &rScale);

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void PrepareAttributes();

#if OSL_DEBUG_LEVEL
            void ToggleDebug() const;
#endif

    void         SetRectHorAlign(RectHorAlign eHorAlign, sal_Bool bApplyToSubTree = sal_True );
    RectHorAlign GetRectHorAlign() const { return eRectHorAlign; }

    const SmRect & GetRect() const { return *this; }
          SmRect & GetRect()       { return *this; }

    virtual void Move(const Point &rPosition);
    void MoveTo(const Point &rPosition) { Move(rPosition - GetTopLeft()); }
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    virtual void CreateTextFromNode(String &rText);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;

    virtual void    GetAccessibleText( String &rText ) const;
    sal_Int32       GetAccessibleIndex() const { return nAccIndex; }
    const SmNode *  FindNodeWithAccessibleIndex(xub_StrLen nAccIndex) const;

    sal_uInt16  GetRow() const    { return (sal_uInt16)aNodeToken.nRow; }
    sal_uInt16  GetColumn() const { return (sal_uInt16)aNodeToken.nCol; }

    SmScaleMode     GetScaleMode() const { return eScaleMode; }
    void            SetScaleMode(SmScaleMode eMode) { eScaleMode = eMode; }

    virtual void AdaptToX(const OutputDevice &rDev, sal_uLong nWidth);
    virtual void AdaptToY(const OutputDevice &rDev, sal_uLong nHeight);

    SmNodeType      GetType() const  { return eType; }
    const SmToken & GetToken() const { return aNodeToken; }

    const SmNode *  FindTokenAt(sal_uInt16 nRow, sal_uInt16 nCol) const;
    const SmNode *  FindRectClosestTo(const Point &rPoint) const;

    // --> 4.7.2010 #i972#
    virtual long GetFormulaBaseline() const;
    // <--
};


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


class SmStructureNode : public SmNode
{
    SmNodeArray  aSubNodes;

protected:
    SmStructureNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    :   SmNode(eNodeType, rNodeToken)
    {}

public:
            SmStructureNode( const SmStructureNode &rNode );
    virtual ~SmStructureNode();

    virtual sal_Bool        IsVisible() const;

    virtual sal_uInt16      GetNumSubNodes() const;
            void        SetNumSubNodes(sal_uInt16 nSize) { aSubNodes.resize(nSize); }

    using   SmNode::GetSubNode;
    virtual SmNode *    GetSubNode(sal_uInt16 nIndex);
            void SetSubNodes(SmNode *pFirst, SmNode *pSecond, SmNode *pThird = NULL);
            void SetSubNodes(const SmNodeArray &rNodeArray);

    virtual SmStructureNode & operator = ( const SmStructureNode &rNode );

    virtual void  GetAccessibleText( String &rText ) const;
};


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


class SmVisibleNode : public SmNode
{
protected:
    SmVisibleNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    :   SmNode(eNodeType, rNodeToken)
    {}

public:

    virtual sal_Bool        IsVisible() const;
    virtual sal_uInt16      GetNumSubNodes() const;
    using   SmNode::GetSubNode;
    virtual SmNode *    GetSubNode(sal_uInt16 nIndex);
};


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


class SmGraphicNode : public SmVisibleNode
{
protected:
    SmGraphicNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    :   SmVisibleNode(eNodeType, rNodeToken)
    {}

public:

    virtual void  GetAccessibleText( String &rText ) const;
};


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


class SmRectangleNode : public SmGraphicNode
{
    Size  aToSize;

public:
    SmRectangleNode(const SmToken &rNodeToken)
    :   SmGraphicNode(NRECTANGLE, rNodeToken)
    {}

    virtual void AdaptToX(const OutputDevice &rDev, sal_uLong nWidth);
    virtual void AdaptToY(const OutputDevice &rDev, sal_uLong nHeight);

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;

    void CreateTextFromNode(String &rText);
};


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


class SmPolyLineNode : public SmGraphicNode
{
    Polygon     aPoly;
    Size        aToSize;
    long        nWidth;

public:
    SmPolyLineNode(const SmToken &rNodeToken);

    long         GetWidth() const { return nWidth; }

    virtual void AdaptToX(const OutputDevice &rDev, sal_uLong nWidth);
    virtual void AdaptToY(const OutputDevice &rDev, sal_uLong nHeight);

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;
};


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


class SmTextNode : public SmVisibleNode
{
    XubString   aText;
    sal_uInt16      nFontDesc;

protected:
    SmTextNode(SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 nFontDescP );

public:
    SmTextNode(const SmToken &rNodeToken, sal_uInt16 nFontDescP );

    sal_uInt16              GetFontDesc() const { return nFontDesc; }
    void                SetText(const XubString &rText) { aText = rText; }
    const XubString &   GetText() const { return aText; }

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    virtual void CreateTextFromNode(String &rText);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;

    virtual void  GetAccessibleText( String &rText ) const;
};


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


class SmSpecialNode : public SmTextNode
{
    bool    bIsFromGreekSymbolSet;

protected:
    SmSpecialNode(SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 _nFontDesc);

public:
    SmSpecialNode(const SmToken &rNodeToken);

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;
};


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


class SmGlyphSpecialNode : public SmSpecialNode
{
public:
    SmGlyphSpecialNode(const SmToken &rNodeToken)
    :   SmSpecialNode(NGLYPH_SPECIAL, rNodeToken, FNT_MATH)
    {}

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmMathSymbolNode : public SmSpecialNode
{
protected:
    SmMathSymbolNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    :   SmSpecialNode(eNodeType, rNodeToken, FNT_MATH)
    {
        xub_Unicode cChar = GetToken().cMathChar;
        if ((xub_Unicode) '\0' != cChar)
            SetText( cChar );
    }

public:
    SmMathSymbolNode(const SmToken &rNodeToken);

    virtual void AdaptToX(const OutputDevice &rDev, sal_uLong nWidth);
    virtual void AdaptToY(const OutputDevice &rDev, sal_uLong nHeight);

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmRootSymbolNode : public SmMathSymbolNode
{
    sal_uLong  nBodyWidth;  // width of body (argument) of root sign

public:
    SmRootSymbolNode(const SmToken &rNodeToken)
    :   SmMathSymbolNode(NROOTSYMBOL, rNodeToken)
    {}

    virtual void AdaptToX(const OutputDevice &rDev, sal_uLong nWidth);
    virtual void AdaptToY(const OutputDevice &rDev, sal_uLong nHeight);

#ifdef SM_RECT_DEBUG
    using   SmRect::Draw;
#endif
    virtual void Draw(OutputDevice &rDev, const Point &rPosition) const;
};


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


class SmPlaceNode : public SmMathSymbolNode
{
public:
    SmPlaceNode(const SmToken &rNodeToken)
    :   SmMathSymbolNode(NPLACE, rNodeToken)
    {
    }

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmErrorNode : public SmMathSymbolNode
{
public:
    SmErrorNode(SmParseError /*eError*/, const SmToken &rNodeToken)
    :   SmMathSymbolNode(NERROR, rNodeToken)
    {
        SetText((xub_Unicode) MS_ERROR);
    }

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmTableNode : public SmStructureNode
{
    // --> 4.7.2010 #i972#
    long nFormulaBaseline;
    // <--
public:
    SmTableNode(const SmToken &rNodeToken)
    :   SmStructureNode(NTABLE, rNodeToken)
    {}

    using   SmNode::GetLeftMost;
    virtual SmNode * GetLeftMost();

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    virtual long GetFormulaBaseline() const;
};


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


class SmLineNode : public SmStructureNode
{
    sal_Bool  bUseExtraSpaces;

protected:
    SmLineNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    :   SmStructureNode(eNodeType, rNodeToken)
    {
        bUseExtraSpaces = sal_True;
    }

public:
    SmLineNode(const SmToken &rNodeToken)
    :   SmStructureNode(NLINE, rNodeToken)
    {
        bUseExtraSpaces = sal_True;
    }

    void  SetUseExtraSpaces(sal_Bool bVal) { bUseExtraSpaces = bVal; }
    sal_Bool  IsUseExtraSpaces() const { return bUseExtraSpaces; };

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmExpressionNode : public SmLineNode
{
public:
    SmExpressionNode(const SmToken &rNodeToken)
    :   SmLineNode(NEXPRESSION, rNodeToken)
    {}

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmUnHorNode : public SmStructureNode
{
public:
    SmUnHorNode(const SmToken &rNodeToken)
    :   SmStructureNode(NUNHOR, rNodeToken)
    {
        SetNumSubNodes(2);
    }

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmRootNode : public SmStructureNode
{
protected:
    void   GetHeightVerOffset(const SmRect &rRect,
                              long &rHeight, long &rVerOffset) const;
    Point  GetExtraPos(const SmRect &rRootSymbol, const SmRect &rExtra) const;

public:
    SmRootNode(const SmToken &rNodeToken)
    :   SmStructureNode(NROOT, rNodeToken)
    {
        SetNumSubNodes(3);
    }

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmBinHorNode : public SmStructureNode
{
public:
    SmBinHorNode(const SmToken &rNodeToken)
    :   SmStructureNode(NBINHOR, rNodeToken)
    {
        SetNumSubNodes(3);
    }

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmBinVerNode : public SmStructureNode
{
public:
    SmBinVerNode(const SmToken &rNodeToken)
    :   SmStructureNode(NBINVER, rNodeToken)
    {
        SetNumSubNodes(3);
    }

    using   SmNode::GetLeftMost;
    virtual SmNode * GetLeftMost();

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmBinDiagonalNode : public SmStructureNode
{
    sal_Bool    bAscending;

    void    GetOperPosSize(Point &rPos, Size &rSize,
                           const Point &rDiagPoint, double fAngleDeg) const;

public:
    SmBinDiagonalNode(const SmToken &rNodeToken);

    sal_Bool    IsAscending() const { return bAscending; }
    void    SetAscending(sal_Bool bVal)  { bAscending = bVal; }

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


// enums used to index sub-/supscripts in the 'aSubNodes' array
// in 'SmSubSupNode'
// See graphic for positions at char:
//
//      CSUP
//
// LSUP H  H RSUP
//      H  H
//      HHHH
//      H  H
// LSUB H  H RSUB
//
//      CSUB
//
enum SmSubSup
{   CSUB, CSUP, RSUB, RSUP, LSUB, LSUP
};

// numbers of entries in the above enum (that is: the number of possible
// sub-/supscripts)
#define SUBSUP_NUM_ENTRIES 6


class SmSubSupNode : public SmStructureNode
{
    sal_Bool  bUseLimits;

public:
    SmSubSupNode(const SmToken &rNodeToken)
    :   SmStructureNode(NSUBSUP, rNodeToken)
    {
        SetNumSubNodes(1 + SUBSUP_NUM_ENTRIES);
        bUseLimits = sal_False;
    }

    SmNode *       GetBody()    { return GetSubNode(0); }
    const SmNode * GetBody() const
    {
        return ((SmSubSupNode *) this)->GetBody();
    }

    void  SetUseLimits(sal_Bool bVal) { bUseLimits = bVal; }
    sal_Bool  IsUseLimits() const { return bUseLimits; };

    SmNode * GetSubSup(SmSubSup eSubSup) { return GetSubNode( sal::static_int_cast< sal_uInt16 >(1 + eSubSup) ); };

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);

};


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


class SmBraceNode : public SmStructureNode
{
public:
    SmBraceNode(const SmToken &rNodeToken)
    :   SmStructureNode(NBRACE, rNodeToken)
    {
        SetNumSubNodes(3);
    }

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmBracebodyNode : public SmStructureNode
{
    long  nBodyHeight;

public:
    inline SmBracebodyNode(const SmToken &rNodeToken);

    virtual void    Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    long            GetBodyHeight() const { return nBodyHeight; }
};


inline SmBracebodyNode::SmBracebodyNode(const SmToken &rNodeToken) :
    SmStructureNode(NBRACEBODY, rNodeToken)
{
    nBodyHeight = 0;
}


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


class SmVerticalBraceNode : public SmStructureNode
{
public:
    inline SmVerticalBraceNode(const SmToken &rNodeToken);

    virtual void    Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


inline SmVerticalBraceNode::SmVerticalBraceNode(const SmToken &rNodeToken) :
    SmStructureNode(NVERTICAL_BRACE, rNodeToken)
{
    SetNumSubNodes(3);
}


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


class SmOperNode : public SmStructureNode
{
public:
    SmOperNode(const SmToken &rNodeToken)
    :   SmStructureNode(NOPER, rNodeToken)
    {
        SetNumSubNodes(2);
    }

    SmNode *       GetSymbol();
    const SmNode * GetSymbol() const
    {
        return ((SmOperNode *) this)->GetSymbol();
    }

    long CalcSymbolHeight(const SmNode &rSymbol, const SmFormat &rFormat) const;

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmAlignNode : public SmStructureNode
{
public:
    SmAlignNode(const SmToken &rNodeToken)
    :   SmStructureNode(NALIGN, rNodeToken)
    {}

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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


class SmAttributNode : public SmStructureNode
{
public:
    SmAttributNode(const SmToken &rNodeToken)
    :   SmStructureNode(NATTRIBUT, rNodeToken)
    {}

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmFontNode : public SmStructureNode
{
    sal_uInt16      nSizeType;
    Fraction    aFontSize;

public:
    SmFontNode(const SmToken &rNodeToken)
    :   SmStructureNode(NFONT, rNodeToken)
    {
        nSizeType = FNTSIZ_MULTIPLY;
        aFontSize = Fraction(1L);
    }

    void SetSizeParameter(const Fraction &rValue, sal_uInt16 nType);
    const Fraction & GetSizeParameter() const {return aFontSize;}
    const sal_uInt16& GetSizeType() const {return nSizeType;}

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmMatrixNode : public SmStructureNode
{
    sal_uInt16  nNumRows,
            nNumCols;

public:
    SmMatrixNode(const SmToken &rNodeToken)
    :   SmStructureNode(NMATRIX, rNodeToken)
    {
        nNumRows = nNumCols = 0;
    }

    sal_uInt16 GetNumRows() const {return nNumRows;}
    sal_uInt16 GetNumCols() const {return nNumCols;}
    void SetRowCol(sal_uInt16 nMatrixRows, sal_uInt16 nMatrixCols);

    using   SmNode::GetLeftMost;
    virtual SmNode * GetLeftMost();

    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
    void CreateTextFromNode(String &rText);
};


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


class SmBlankNode : public SmGraphicNode
{
    sal_uInt16  nNum;

public:
    SmBlankNode(const SmToken &rNodeToken)
    :   SmGraphicNode(NBLANK, rNodeToken)
    {
        nNum = 0;
    }

    void         IncreaseBy(const SmToken &rToken);
    void         Clear() { nNum = 0; }

    virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell);
    virtual void Arrange(const OutputDevice &rDev, const SmFormat &rFormat);
};


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

#endif