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/*
* Expression.h: interface for the CExpression class.
* $Id$
* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Erwin Coumans makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#if !defined _EXPRESSION_H
#define _EXPRESSION_H
#include "Value.h"
//extern int gRefCountExpr; // only for debugging purposes (detect mem.leaks)
#define PLUGIN_DECLARE_SERIAL_EXPRESSION(class_name,base_class_name) \
public: \
virtual base_class_name * Copy() { return new class_name; } \
virtual bool EdSerialize(CompressorArchive& arch,class CFactoryManager* facmgr,bool bIsStoring); \
virtual bool EdIdSerialize(CompressorArchive& arch,class CFactoryManager* facmgr,bool bIsStoring) \
{ \
if (bIsStoring) \
{ \
unsigned char exprID = GetExpressionID(); \
arch << exprID; \
} \
return true; \
} \
class CExpression;
// for undo/redo system the deletion in the expressiontree can be restored by replacing broken links 'inplace'
class CBrokenLinkInfo
{
public:
CBrokenLinkInfo(CExpression** pmemexpr,CExpression* expr)
:m_pmemExpr(pmemexpr),
m_pExpr(expr)
{
assertd(pmemexpr);
m_bRestored=false;
};
virtual ~CBrokenLinkInfo();
void RestoreLink();
void BreakLink();
// members vars
private:
CExpression** m_pmemExpr;
CExpression* m_pExpr;
bool m_bRestored;
};
class CExpression
{
public:
enum {
COPERATOR1EXPRESSIONID = 1,
COPERATOR2EXPRESSIONID = 2,
CCONSTEXPRESSIONID = 3,
CIFEXPRESSIONID = 4,
COPERATORVAREXPRESSIONID = 5,
CIDENTIFIEREXPRESSIONID = 6
};
protected:
virtual ~CExpression() = 0; //pure virtual
public:
virtual bool MergeExpression(CExpression* otherexpr) = 0;
CExpression();
virtual CValue* Calculate() = 0; //pure virtual
virtual unsigned char GetExpressionID() = 0;
//virtual bool IsInside(float x,float y,float z,bool bBorderInclude=true) = 0; //pure virtual
virtual bool NeedsRecalculated() = 0; // another pure one
virtual CExpression * CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks) =0; // another pure one
virtual void ClearModified() = 0; // another pure one
//virtual CExpression * Copy() =0;
virtual void BroadcastOperators(VALUE_OPERATOR op) =0;
virtual CExpression * AddRef() { // please leave multiline, for debugger !!!
#ifdef _DEBUG
//gRefCountExpr++;
assertd(m_refcount < 255);
#endif
m_refcount++;
return this;
};
virtual CExpression* Release(CExpression* complicatedtrick=NULL) {
#ifdef _DEBUG
//gRefCountExpr--;
#endif
if (--m_refcount < 1)
{
delete this;
} //else
// return this;
return complicatedtrick;
};
protected:
int m_refcount;
};
#endif // !defined _EXPRESSION_H
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