windows-server-2003/shell/ext/cabview/dataobj.h

//*******************************************************************************************
//
// Filename : DataObj.h
//  
//              Definition of CCabObj
//
// Copyright (c) 1994 - 1996 Microsoft Corporation. All rights reserved
//
//*******************************************************************************************

#ifndef _DATAOBJ_H_
#define _DATAOBJ_H_

#include "thisguid.h"

class CCabObj : public IDataObject, public IPersistStream
{
public:
    CCabObj(HWND hwndOwner, CCabFolder *pcf, LPCABITEM *apit, UINT cpit);
    ~CCabObj();

    STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);
    STDMETHODIMP_(ULONG) AddRef();
    STDMETHODIMP_(ULONG) Release();
        
    STDMETHODIMP GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium);
    STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium);
    STDMETHODIMP QueryGetData(FORMATETC *pformatetc);
    STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *pformatectIn, FORMATETC *pformatetcOut);
    STDMETHODIMP SetData(FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease);
    STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc);
    STDMETHODIMP DAdvise(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink,
        DWORD *pdwConnection);
    STDMETHODIMP DUnadvise(DWORD dwConnection);
    STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise);

    // *** IPersist ***
    STDMETHODIMP GetClassID(CLSID* pClassID){ *pClassID = CLSID_CabViewDataObject; return S_OK; }
    
    // *** IPersistStream ***
    STDMETHODIMP IsDirty(void) {return S_OK;} // Indicate that we are dirty and ::Save() needs to be called.
    STDMETHODIMP Load(IStream *pStm);
    STDMETHODIMP Save(IStream *pStm, BOOL fClearDirty);
    STDMETHODIMP GetSizeMax(ULARGE_INTEGER * pcbSize);

private:
    BOOL InitFileGroupDesc();
    BOOL InitFileContents();
    BOOL InitPersistedDataObject();
    BOOL InitHIDA();

    static HGLOBAL * CALLBACK ShouldExtract(LPCTSTR pszFile, DWORD dwSize,
        UINT date, UINT time, UINT attribs, LPARAM lParam);

    HRESULT InitContents();
    friend HRESULT CabViewDataObject_CreateInstance(REFIID riid, LPVOID* ppv);
    CCabObj();

private:
    static UINT s_uFileGroupDesc;
    static UINT s_uFileContents;
    static UINT s_uPersistedDataObject;
    static UINT s_uHIDA;

    CRefCount m_cRef;

    CRefDll m_cRefDll;

    CCabItemList m_lSel;
    HGLOBAL *m_lContents;

    CCabFolder *m_pcfHere;
    HWND m_hwndOwner;
};

#endif // _DATAOBJ_H_