1 files changed, 133 insertions, 0 deletions
diff --git a/source/gameengine/Expressions/Expression.h b/source/gameengine/Expressions/Expression.h
new file mode 100644
index 00000000000..f48ac7eb160
--- /dev/null
+++ b/source/gameengine/Expressions/Expression.h
@@ -0,0 +1,133 @@
+/*
+ * 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