FxDatabaseHistory.h

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//
// (C) Copyright 2005-2022 by Graebert GmbH.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// GRAEBERT PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// GRAEBERT SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  GRAEBERT GMBH
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
 
#pragma once
 
#include "FxPragmaPush.h"
 
#include "DDKERNEL.h"
 
class DDKERNEL_API CFxHistoryItem
{
};
 
class DDKERNEL_API CFxHistoryStack
{
public:
    // need a virtual destructor
    virtual ~CFxHistoryStack();
    virtual bool IsEmpty() = 0;
 
    virtual CFxHistoryItem& Top() = 0;
 
    virtual void Pop() = 0;
 
    virtual void Push( CFxHistoryItem& pData ) = 0;
 
    virtual int GetStackDepth() = 0;
};
 
class CFxString;
 
class DDKERNEL_API CFxDatabaseHistory
{
public:
    virtual CFxHistoryStack* Get( const CFxString& strKey ) = 0;
    virtual void Add( const CFxString& strKey, CFxHistoryStack* pHistory ) = 0;
};
 
#include "FxPragmaPop.h"