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#ifndef _CELLFML_HXX
#define _CELLFML_HXX

#include <tools/string.hxx>

class SwTable;
class SwNode;
class SwTableSortBoxes;
class SwSelBoxes;
class SwCalc;
class SwTableBox;
class SwTableFmlUpdate;
class SwDoc;
class String;

class SwTblCalcPara
{
	const SwTableBox* pLastTblBox;
	sal_uInt16 nStackCnt, nMaxSize;

public:
	SwTableSortBoxes *pBoxStk;	// Stack fuers erkennen von Rekursionen !
	SwCalc& rCalc;				// akt. Calculator
	const SwTable* pTbl;        // akt. Tabelle

	SwTblCalcPara( SwCalc& rCalculator, const SwTable& rTable );
	~SwTblCalcPara();

	sal_Bool CalcWithStackOverflow();
	sal_Bool IsStackOverFlow() const 		{ return nMaxSize == nStackCnt; }
	sal_Bool IncStackCnt() 					{ return nMaxSize == ++nStackCnt; }
	void DecStackCnt() 					{ if( nStackCnt ) --nStackCnt; }
	void SetLastTblBox( const SwTableBox* pBox )	{ pLastTblBox = pBox; }
};



class SwTableFormula
{
typedef void (SwTableFormula:: *FnScanFormel)( const SwTable&, String&,
											String&, String*, void* ) const;

	void BoxNmsToPtr( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void PtrToBoxNms( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void RelNmsToBoxNms( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void RelBoxNmsToPtr( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void BoxNmsToRelNm( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void _MakeFormel( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void _GetFmlBoxes( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void _HasValidBoxes( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;
	void _SplitMergeBoxNm( const SwTable&, String&, String&, String* = 0,
						void* pPara = 0 ) const;

	void GetBoxes( const SwTableBox& rStt, const SwTableBox& rEnd,
					SwSelBoxes& rBoxes ) const;
	String ScanString( FnScanFormel fnFormel, const SwTable& rTbl,
						void* = 0 ) const;

	const SwTable* FindTable( SwDoc& rDoc, const String& rNm ) const;

protected:
	enum NameType { EXTRNL_NAME, INTRNL_NAME, REL_NAME };

	String 		sFormel;			// akt. Formel
	NameType 	eNmType;			// akt. Darstellungs Art
	sal_Bool 		bValidValue;		// sal_True: Formel neu berechnen

	// suche den Node, in dem die Formel steht:
	//	TextFeld	-> TextNode,
	//	BoxAttribut	-> BoxStartNode
	// !!! MUSS VON JEDER ABLEITUNG UEBERLADEN WERDEN !!!
	virtual const SwNode* GetNodeOfFormula() const = 0;

	SwTableFormula( const String& rFormel );

	String MakeFormel( SwTblCalcPara& rCalcPara ) const
	{
		return ScanString( &SwTableFormula::_MakeFormel,
							*rCalcPara.pTbl, &rCalcPara );
	}

	static sal_uInt16 GetLnPosInTbl( const SwTable& rTbl, const SwTableBox* pBox );

public:

	SwTableFormula( const SwTableFormula& rCpy )	{ *this = rCpy; }
	virtual ~SwTableFormula();
	SwTableFormula& operator=( const SwTableFormula& rCpy )
		{
									sFormel = rCpy.sFormel;
									eNmType = rCpy.eNmType;
									bValidValue = rCpy.bValidValue;
									return *this;
		}

	// erzeuge aus der internen (fuer CORE) die externe (fuer UI) Formel
	void PtrToBoxNm( const SwTable* pTbl );
	// erzeuge aus der externen (fuer UI) die interne (fuer CORE) Formel
	void BoxNmToPtr( const SwTable* pTbl );
	// erzeuge aus der externen/internen Formel die relative Formel
	void ToRelBoxNm( const SwTable* pTbl );
	// wird vorm/nach dem mergen/splitten von Tabellen rerufen
	void ToSplitMergeBoxNm( SwTableFmlUpdate& rTblUpd );

	// ist gerade eine intern Darstellung aktiv
	sal_Bool IsIntrnlName() const			{ return eNmType == INTRNL_NAME; }
	// erfrage die akt. Darstellung der Formel
	NameType GetNameType() const		{ return eNmType; }

	// erfrage/setze das Flag, ob der akt. Wert gueltig ist
	sal_Bool 		IsValid() const				{ return bValidValue; }
	inline void	ChgValid( sal_Bool bNew )		{ bValidValue = bNew; }

	const String& GetFormula() const 		{ return sFormel; }
	void SetFormula( const String& rNew )
		{
			sFormel = rNew;
			bValidValue = sal_False;
			eNmType = EXTRNL_NAME;
		}

	sal_uInt16 GetBoxesOfFormula( const SwTable& rTbl, SwSelBoxes& rBoxes );
	// sind alle Boxen gueltig, auf die sich die Formel bezieht?
	sal_Bool HasValidBoxes() const;
};



#endif
