Source code of Windows XP (NT5)
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/*
* _DXFROBJ.H
*
* Purpose:
* Class declaration for an OLE data transfer object (for use in
* drag drop and clipboard operations)
*
* Author:
* alexgo (4/25/95)
*
* Copyright (c) 1995-1998, Microsoft Corporation. All rights reserved.
*/
#ifndef __DXFEROBJ_H__
#define __DXFEROBJ_H__
class CTxtRange;
EXTERN_C const IID IID_IRichEditDO;
/*
* CDataTransferObj
*
* Purpose:
* holds a "snapshot" of some rich-text data that can be used
* for drag drop or clipboard operations
*
* Notes:
* FUTURE (alexgo): add in support for TOM<-->TOM optimized data
* transfers
*/
class CDataTransferObj : public IDataObject, public ITxNotify
{
public:
// IUnknown methods
STDMETHOD(QueryInterface)(REFIID riid, void ** ppvObj);
STDMETHOD_(ULONG, AddRef)();
STDMETHOD_(ULONG, Release)();
// IDataObject methods
STDMETHOD(DAdvise)( FORMATETC * pFormatetc, DWORD advf,
IAdviseSink *pAdvSink, DWORD *pdwConnection);
STDMETHOD(DUnadvise)( DWORD dwConnection);
STDMETHOD(EnumDAdvise)( IEnumSTATDATA ** ppenumAdvise);
STDMETHOD(EnumFormatEtc)( DWORD dwDirection,
IEnumFORMATETC **ppenumFormatEtc);
STDMETHOD(GetCanonicalFormatEtc)( FORMATETC *pformatetc,
FORMATETC *pformatetcOut);
STDMETHOD(GetData)( FORMATETC *pformatetcIn, STGMEDIUM *pmedium );
STDMETHOD(GetDataHere)( FORMATETC *pformatetc, STGMEDIUM *pmedium);
STDMETHOD(QueryGetData)( FORMATETC *pformatetc );
STDMETHOD(SetData)( FORMATETC *pformatetc, STGMEDIUM *pmedium,
BOOL fRelease);
// ITxNotify methods
virtual void OnPreReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
LONG cpFormatMin, LONG cpFormatMax);
virtual void OnPostReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
LONG cpFormatMin, LONG cpFormatMax);
virtual void Zombie();
static CDataTransferObj * Create(CTxtEdit *ped, CTxtRange *prg, LONG lStreamFormat);
private:
// NOTE: private cons/destructor, may not be allocated on the stack as
// this would break OLE's current object liveness rules
CDataTransferObj(CTxtEdit *ped);
~CDataTransferObj();
BOOL IsZombie() {return !_ped;}
ULONG _crefs;
ULONG _cTotal; // total number of formats supported
FORMATETC * _prgFormats; // the array of supported formats
LONG _lStreamFormat; // Stream format to use in Rtf conversion
// for 1.0 compatability
DWORD _dwFlags;
DWORD _dwUser;
DWORD _dvaspect;
enum TEXTKIND
{
tPlain,
tRtf,
tRtfUtf8,
tRtfNCRforNonASCII
};
HGLOBAL TextToHglobal( HGLOBAL &hText, TEXTKIND tKind );
LPSTORAGE GetDataForEmbeddedObject( LPOLEOBJECT pOleObj, LPSTORAGE lpstgdest );
HGLOBAL GetDataForObjectDescriptor( LPOLEOBJECT pOleObj, DWORD dwAspect, SIZEL* psizel );
public:
CTxtEdit * _ped;
HGLOBAL _hPlainText; // handle to the plain UNICODE text
HGLOBAL _hRtfText; // handle to the RTF UNICODE text
HGLOBAL _hRtfUtf8; // Handle to UTF8 encoding of RTF
HGLOBAL _hRtfNCRforNonASCII; // Handle to NCRforNonASCII encoding of RTF
IOleObject * _pOleObj; // Embedded Object
LPSTORAGE _pObjStg; // Embedded object data
HGLOBAL _hObjDesc; // Embedded object descriptor
HMETAFILE _hMFPict; // Embedded object metafile
LONG _cch; // number of "characters" in the this
// dxfer object
LONG _cpMin; // Starting cp for this dxfer object
LONG _cObjs; // number of objects in this dxfer object.
};
/*
* class CEnumFormatEtc
*
* Purpose:
* implements a generic format enumerator for IDataObject
*/
class CEnumFormatEtc : public IEnumFORMATETC
{
public:
STDMETHOD(QueryInterface)(REFIID riid, void **ppvObj);
STDMETHOD_(ULONG,AddRef)(void);
STDMETHOD_(ULONG,Release)(void);
STDMETHOD(Next) (ULONG celt, FORMATETC *rgelt,
ULONG *pceltFetched);
STDMETHOD(Skip) (ULONG celt);
STDMETHOD(Reset) (void);
STDMETHOD(Clone) (IEnumFORMATETC **ppenum);
static HRESULT Create(FORMATETC *prgFormats, DWORD cFormats,
IEnumFORMATETC **ppenum);
private:
CEnumFormatEtc();
~CEnumFormatEtc();
ULONG _crefs;
ULONG _iCurrent; // current clipboard format
ULONG _cTotal; // total number of formats
FORMATETC * _prgFormats; // array of available formats
};
//
// Some globally useful FORMATETCs
extern FORMATETC g_rgFETC[];
extern const DWORD g_rgDOI[];
#define CFETC 17 // Dimension of g_rgFETC[]
enum FETCINDEX // Keep in sync with g_rgFETC[]
{
iRtfUtf8, // RTF in UTF8 encoding
iRtfFETC, // RTF
iRtfNCRforNonASCII, // RTF with NCR for nonASCII
iEmbObj, // Embedded Object
iEmbSrc, // Embed Source
iObtDesc, // Object Descriptor
iLnkSrc, // Link Source
iMfPict, // Metafile
iDIB, // DIB
iBitmap, // Bitmap
iRtfNoObjs, // RTF with no objects
iUnicodeFETC, // Unicode plain text
iAnsiFETC, // ANSI plain text
iFilename, // Filename
iRtfAsTextFETC, // Pastes RTF as text
iTxtObj, // Richedit Text
iRichEdit // RichEdit Text w/formatting
};
#define cf_RICHEDIT g_rgFETC[iRichEdit].cfFormat
#define cf_EMBEDDEDOBJECT g_rgFETC[iEmbObj].cfFormat
#define cf_EMBEDSOURCE g_rgFETC[iEmbSrc].cfFormat
#define cf_OBJECTDESCRIPTOR g_rgFETC[iObtDesc].cfFormat
#define cf_LINKSOURCE g_rgFETC[iLnkSrc].cfFormat
#define cf_RTF g_rgFETC[iRtfFETC].cfFormat
#define cf_RTFUTF8 g_rgFETC[iRtfUtf8].cfFormat
#define cf_RTFNCRFORNONASCII g_rgFETC[iRtfNCRforNonASCII].cfFormat
#define cf_RTFNOOBJS g_rgFETC[iRtfNoObjs].cfFormat
#define cf_TEXTOBJECT g_rgFETC[iTxtObj].cfFormat
#define cf_RTFASTEXT g_rgFETC[iRtfAsTextFETC].cfFormat
#define cf_FILENAME g_rgFETC[iFilename].cfFormat
#endif // !__DXFROBJ_H__