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