CWE-ou-minkata/Sources/Plasma/NucleusLib/pnMessage/plRefMsg.h

/*==LICENSE==*

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*==LICENSE==*/
#ifndef plRefMsg_inc
#define plRefMsg_inc

#include "plMessage.h"

class hsStream;
class hsKeyedObject;

class plRefMsg : public plMessage
{
public:
    enum Context
    {
        kOnCreate           = 0x1,  // fRef just created.
        kOnDestroy          = 0x2,  // fRef about to be destroyed
        kOnRequest          = 0x4,  // fRef wants to be added
        kOnRemove           = 0x8,  // fRef has moved elsewhere
        kOnReplace          = 0x10  // fRef replaces fOldRef
    };

protected:
    hsKeyedObject*          fRef;
    hsKeyedObject*          fOldRef; // on replace

    uint8_t                   fContext;
public:
    plRefMsg();
    plRefMsg(const plKey &r, uint8_t c);

    virtual ~plRefMsg();

    CLASSNAME_REGISTER( plRefMsg );
    GETINTERFACE_ANY( plRefMsg, plMessage );

    plRefMsg&       SetRef(hsKeyedObject* ref);
    hsKeyedObject*  GetRef() { return fRef; }

    plRefMsg&       SetOldRef(hsKeyedObject* oldRef);
    hsKeyedObject*  GetOldRef() { return fOldRef; }

    plRefMsg&   SetContext(uint8_t c) { fContext = c; return *this; }
    uint8_t       GetContext() { return fContext; }

    void Read(hsStream* stream, hsResMgr* mgr);
    void Write(hsStream* stream, hsResMgr* mgr);
};


class plGenRefMsg : public plRefMsg
{
public:
    plGenRefMsg() : fType(-1), fWhich(-1) {}
    plGenRefMsg(const plKey &r, uint8_t c, int32_t which, int8_t type) : plRefMsg(r, c), fWhich(which), fType(type) {}

    CLASSNAME_REGISTER(plGenRefMsg);
    GETINTERFACE_ANY(plGenRefMsg, plRefMsg);

    // User variables.  You can put anything here, but the standard convention
    // is an enum telling what type of ref it is in fType, and an index in
    // fWhich, for keeping track of multiple refs of the same type.
    int8_t    fType;
    int32_t   fWhich;

    void Read(hsStream* stream, hsResMgr* mgr);
    void Write(hsStream* stream, hsResMgr* mgr);
};

#endif // plRefMsg_inc