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[wxWidgets.git] / src / msw / ole / dataobj.cpp
index 1699f9dce67f0a6e761eaf7a996ae5657be466d7..6a4ef3067093f861ca6eaf076866bf11a0d1e41d 100644 (file)
@@ -6,7 +6,7 @@
 // Created:     10.05.98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
-  #pragma implementation "dataobj.h"
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+    #pragma implementation "dataobj.h"
 #endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #if defined(__BORLANDC__)
-  #pragma hdrstop
+    #pragma hdrstop
 #endif
 
-#include "wx/defs.h"
-
-#if defined(__WIN32__) && !defined(__GNUWIN32__)
+#ifndef WX_PRECOMP
+    #include "wx/intl.h"
+    #include "wx/log.h"
+#endif
 
-#include "wx/log.h"
 #include "wx/dataobj.h"
 
-#include <windows.h>
-#include <oleauto.h>
+#if wxUSE_OLE && defined(__WIN32__) && !defined(__GNUWIN32_OLD__)
 
-#ifndef __WIN32__
+#include "wx/msw/private.h"         // includes <windows.h>
+
+#ifdef __WXWINCE__
+#include <winreg.h>
+#endif
+
+// for some compilers, the entire ole2.h must be included, not only oleauto.h
+#if wxUSE_NORLANDER_HEADERS || defined(__WATCOMC__) || defined(__WXWINCE__)
   #include <ole2.h>
-  #include <olestd.h>
 #endif
 
-#include  "wx/msw/ole/oleutils.h"
+#include <oleauto.h>
+#include <shlobj.h>
+
+#include "wx/msw/ole/oleutils.h"
+
+#include "wx/msw/dib.h"
+
+#ifndef CFSTR_SHELLURL
+#define CFSTR_SHELLURL _T("UniformResourceLocator")
+#endif
 
 // ----------------------------------------------------------------------------
 // functions
 // ----------------------------------------------------------------------------
 
-static const char *GetTymedName(DWORD tymed);
+#ifdef __WXDEBUG__
+    static const wxChar *GetTymedName(DWORD tymed);
+#else // !Debug
+    #define GetTymedName(tymed) wxEmptyString
+#endif // Debug/!Debug
 
 // ----------------------------------------------------------------------------
 // wxIEnumFORMATETC interface implementation
 // ----------------------------------------------------------------------------
+
 class wxIEnumFORMATETC : public IEnumFORMATETC
 {
 public:
-  wxIEnumFORMATETC(CLIPFORMAT cf);
+    wxIEnumFORMATETC(const wxDataFormat* formats, ULONG nCount);
+    virtual ~wxIEnumFORMATETC() { delete [] m_formats; }
 
-  DECLARE_IUNKNOWN_METHODS;
+    DECLARE_IUNKNOWN_METHODS;
 
-  // IEnumFORMATETC
-  STDMETHODIMP Next(ULONG celt, FORMATETC *rgelt, ULONG *pceltFetched);
-  STDMETHODIMP Skip(ULONG celt);
-  STDMETHODIMP Reset();
-  STDMETHODIMP Clone(IEnumFORMATETC **ppenum);
+    // IEnumFORMATETC
+    STDMETHODIMP Next(ULONG celt, FORMATETC *rgelt, ULONG *pceltFetched);
+    STDMETHODIMP Skip(ULONG celt);
+    STDMETHODIMP Reset();
+    STDMETHODIMP Clone(IEnumFORMATETC **ppenum);
 
 private:
-  FORMATETC   m_format;   // (unique @@@) format we can provide data in
-  ULONG       m_nCurrent; // current enum position (currently either 0 or 1)
+    CLIPFORMAT *m_formats;  // formats we can provide data in
+    ULONG       m_nCount,   // number of formats we support
+                m_nCurrent; // current enum position
+
+    DECLARE_NO_COPY_CLASS(wxIEnumFORMATETC)
 };
 
 // ----------------------------------------------------------------------------
 // wxIDataObject implementation of IDataObject interface
 // ----------------------------------------------------------------------------
+
 class wxIDataObject : public IDataObject
 {
 public:
-  wxIDataObject(wxDataObject *pDataObject);
+    wxIDataObject(wxDataObject *pDataObject);
+    virtual ~wxIDataObject();
+
+    // normally, wxDataObject controls our lifetime (i.e. we're deleted when it
+    // is), but in some cases, the situation is inversed, that is we delete it
+    // when this object is deleted - setting this flag enables such logic
+    void SetDeleteFlag() { m_mustDelete = TRUE; }
+
+    DECLARE_IUNKNOWN_METHODS;
+
+    // IDataObject
+    STDMETHODIMP GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium);
+    STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium);
+    STDMETHODIMP QueryGetData(FORMATETC *pformatetc);
+    STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *In, FORMATETC *pOut);
+    STDMETHODIMP SetData(FORMATETC *pfetc, STGMEDIUM *pmedium, BOOL fRelease);
+    STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFEtc);
+    STDMETHODIMP DAdvise(FORMATETC *pfetc, DWORD ad, IAdviseSink *p, DWORD *pdw);
+    STDMETHODIMP DUnadvise(DWORD dwConnection);
+    STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise);
 
-  DECLARE_IUNKNOWN_METHODS;
+private:
+    wxDataObject *m_pDataObject;      // pointer to C++ class we belong to
 
-  // IDataObject
-  STDMETHODIMP GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium);
-  STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium);
-  STDMETHODIMP QueryGetData(FORMATETC *pformatetc);
-  STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *In, FORMATETC *pOut);
-  STDMETHODIMP SetData(FORMATETC *pfetc, STGMEDIUM *pmedium, BOOL fRelease);
-  STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFEtc);
-  STDMETHODIMP DAdvise(FORMATETC *pfetc, DWORD ad, IAdviseSink *p, DWORD *pdw);
-  STDMETHODIMP DUnadvise(DWORD dwConnection);
-  STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise);
+    bool m_mustDelete;
 
-private:
-  wxDataObject *m_pDataObject;      // pointer to C++ class we belong to
+    DECLARE_NO_COPY_CLASS(wxIDataObject)
 };
 
 // ============================================================================
@@ -107,7 +141,7 @@ private:
 
 void wxDataFormat::SetId(const wxChar *format)
 {
-    m_format = ::RegisterClipboardFormat(format);
+    m_format = (wxDataFormat::NativeFormat)::RegisterClipboardFormat(format);
     if ( !m_format )
     {
         wxLogError(_("Couldn't register clipboard format '%s'."), format);
@@ -121,10 +155,9 @@ wxString wxDataFormat::GetId() const
     wxString s;
 
     wxCHECK_MSG( !IsStandard(), s,
-                 _T("name of predefined format cannot be retrieved") );
+                 wxT("name of predefined format cannot be retrieved") );
 
-    int len = ::GetClipboardFormatName(m_format, s.GetWriteBuf(max), max);
-    s.UngetWriteBuf();
+    int len = ::GetClipboardFormatName(m_format, wxStringBuffer(s, max), max);
 
     if ( !len )
     {
@@ -139,70 +172,85 @@ wxString wxDataFormat::GetId() const
 // ----------------------------------------------------------------------------
 
 BEGIN_IID_TABLE(wxIEnumFORMATETC)
-  ADD_IID(Unknown)
-  ADD_IID(EnumFORMATETC)
+    ADD_IID(Unknown)
+    ADD_IID(EnumFORMATETC)
 END_IID_TABLE;
 
 IMPLEMENT_IUNKNOWN_METHODS(wxIEnumFORMATETC)
 
-wxIEnumFORMATETC::wxIEnumFORMATETC(CLIPFORMAT cf)
+wxIEnumFORMATETC::wxIEnumFORMATETC(const wxDataFormat *formats, ULONG nCount)
 {
-  m_format.cfFormat = cf;
-  m_format.ptd      = NULL;
-  m_format.dwAspect = DVASPECT_CONTENT;
-  m_format.lindex   = -1;
-  m_format.tymed    = TYMED_HGLOBAL;
-  m_cRef = 0;
-  m_nCurrent = 0;
+    m_nCurrent = 0;
+    m_nCount = nCount;
+    m_formats = new CLIPFORMAT[nCount];
+    for ( ULONG n = 0; n < nCount; n++ ) {
+        m_formats[n] = formats[n].GetFormatId();
+    }
 }
 
 STDMETHODIMP wxIEnumFORMATETC::Next(ULONG      celt,
                                     FORMATETC *rgelt,
                                     ULONG     *pceltFetched)
 {
-  wxLogTrace(_T("wxIEnumFORMATETC::Next"));
-
-  if ( celt > 1 )
-    return S_FALSE;
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Next"));
+
+    ULONG numFetched = 0;
+    while (m_nCurrent < m_nCount && numFetched < celt) {
+        FORMATETC format;
+        format.cfFormat = m_formats[m_nCurrent++];
+        format.ptd      = NULL;
+        format.dwAspect = DVASPECT_CONTENT;
+        format.lindex   = -1;
+        format.tymed    = TYMED_HGLOBAL;
+
+        *rgelt++ = format;
+        numFetched++;
+    }
 
-  if ( m_nCurrent == 0 ) {
-    *rgelt = m_format;
-    m_nCurrent++;
+    if (pceltFetched)
+        *pceltFetched = numFetched;
 
-    return S_OK;
-  }
-  else
-    return S_FALSE;
+    return numFetched == celt ? S_OK : S_FALSE;
 }
 
 STDMETHODIMP wxIEnumFORMATETC::Skip(ULONG celt)
 {
-  wxLogTrace(_T("wxIEnumFORMATETC::Skip"));
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Skip"));
+
+    m_nCurrent += celt;
+    if ( m_nCurrent < m_nCount )
+        return S_OK;
 
-  if ( m_nCurrent == 0 )
-    m_nCurrent++;
+    // no, can't skip this many elements
+    m_nCurrent -= celt;
 
-  return S_FALSE;
+    return S_FALSE;
 }
 
 STDMETHODIMP wxIEnumFORMATETC::Reset()
 {
-  wxLogTrace(_T("wxIEnumFORMATETC::Reset"));
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Reset"));
 
-  m_nCurrent = 0;
+    m_nCurrent = 0;
 
-  return S_OK;
+    return S_OK;
 }
 
 STDMETHODIMP wxIEnumFORMATETC::Clone(IEnumFORMATETC **ppenum)
 {
-  wxLogTrace(_T("wxIEnumFORMATETC::Clone"));
-
-  wxIEnumFORMATETC *pNew = new wxIEnumFORMATETC(m_format.cfFormat);
-  pNew->AddRef();
-  *ppenum = pNew;
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Clone"));
+
+    // unfortunately, we can't reuse the code in ctor - types are different
+    wxIEnumFORMATETC *pNew = new wxIEnumFORMATETC(NULL, 0);
+    pNew->m_nCount = m_nCount;
+    pNew->m_formats = new CLIPFORMAT[m_nCount];
+    for ( ULONG n = 0; n < m_nCount; n++ ) {
+        pNew->m_formats[n] = m_formats[n];
+    }
+    pNew->AddRef();
+    *ppenum = pNew;
 
-  return S_OK;
+    return S_OK;
 }
 
 // ----------------------------------------------------------------------------
@@ -210,169 +258,407 @@ STDMETHODIMP wxIEnumFORMATETC::Clone(IEnumFORMATETC **ppenum)
 // ----------------------------------------------------------------------------
 
 BEGIN_IID_TABLE(wxIDataObject)
-  ADD_IID(Unknown)
-  ADD_IID(DataObject)
+    ADD_IID(Unknown)
+    ADD_IID(DataObject)
 END_IID_TABLE;
 
 IMPLEMENT_IUNKNOWN_METHODS(wxIDataObject)
 
 wxIDataObject::wxIDataObject(wxDataObject *pDataObject)
 {
-  m_cRef = 0;
-  m_pDataObject = pDataObject;
+    m_pDataObject = pDataObject;
+    m_mustDelete = FALSE;
+}
+
+wxIDataObject::~wxIDataObject()
+{
+    if ( m_mustDelete )
+    {
+        delete m_pDataObject;
+    }
 }
 
 // get data functions
 STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
 {
-  wxLogTrace(_T("wxIDataObject::GetData"));
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetData"));
+
+    // is data is in our format?
+    HRESULT hr = QueryGetData(pformatetcIn);
+    if ( FAILED(hr) )
+        return hr;
+
+    // for the bitmaps and metafiles we use the handles instead of global memory
+    // to pass the data
+    wxDataFormat format = (wxDataFormat::NativeFormat)pformatetcIn->cfFormat;
 
-  // is data is in our format?
-  HRESULT hr = QueryGetData(pformatetcIn);
-  if ( FAILED(hr) )
-    return hr;
+    switch ( format )
+    {
+        case wxDF_BITMAP:
+            pmedium->tymed = TYMED_GDI;
+            break;
+
+        case wxDF_ENHMETAFILE:
+            pmedium->tymed = TYMED_ENHMF;
+            break;
+
+#ifndef __WXWINCE__
+        case wxDF_METAFILE:
+            pmedium->hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
+                                           sizeof(METAFILEPICT));
+            if ( !pmedium->hGlobal ) {
+                wxLogLastError(wxT("GlobalAlloc"));
+                return E_OUTOFMEMORY;
+            }
+            pmedium->tymed = TYMED_MFPICT;
+            break;
+#endif
+        default:
+            // alloc memory
+            size_t size = m_pDataObject->GetDataSize(format);
+            if ( !size ) {
+                // it probably means that the method is just not implemented
+                wxLogDebug(wxT("Invalid data size - can't be 0"));
+
+                return DV_E_FORMATETC;
+            }
+
+            if ( !format.IsStandard() ) {
+                // for custom formats, put the size with the data - alloc the
+                // space for it
+                // MB: not completely sure this is correct,
+                //     even if I can't figure out what's wrong
+                size += m_pDataObject->GetBufferOffset( format );
+            }
+
+            HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, size);
+            if ( hGlobal == NULL ) {
+                wxLogLastError(wxT("GlobalAlloc"));
+                return E_OUTOFMEMORY;
+            }
+
+            // copy data
+            pmedium->tymed   = TYMED_HGLOBAL;
+            pmedium->hGlobal = hGlobal;
+    }
 
-  // alloc memory
-  HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
-                                m_pDataObject->GetDataSize());
-  if ( hGlobal == NULL ) {
-    wxLogLastError("GlobalAlloc");
-    return E_OUTOFMEMORY;
-  }
+    pmedium->pUnkForRelease = NULL;
 
-  // copy data
-  pmedium->tymed          = TYMED_HGLOBAL;
-  pmedium->hGlobal        = hGlobal;
-  pmedium->pUnkForRelease = NULL;
+    // do copy the data
+    hr = GetDataHere(pformatetcIn, pmedium);
+    if ( FAILED(hr) ) {
+        // free resources we allocated
+        if ( pmedium->tymed & (TYMED_HGLOBAL | TYMED_MFPICT) ) {
+            GlobalFree(pmedium->hGlobal);
+        }
 
-  hr = GetDataHere(pformatetcIn, pmedium);
-  if ( FAILED(hr) ) {
-    GlobalFree(hGlobal);
-    return hr;
-  }
+        return hr;
+    }
 
-  return S_OK;
+    return S_OK;
 }
 
 STDMETHODIMP wxIDataObject::GetDataHere(FORMATETC *pformatetc,
                                         STGMEDIUM *pmedium)
 {
-  wxLogTrace(_T("wxIDataObject::GetDataHere"));
-
-  // put data in caller provided medium
-  if ( pmedium->tymed != TYMED_HGLOBAL )
-    return DV_E_TYMED;
-
-  // copy data
-  void *pBuf = GlobalLock(pmedium->hGlobal);
-  if ( pBuf == NULL ) {
-    wxLogLastError(_T("GlobalLock"));
-    return E_OUTOFMEMORY;
-  }
-
-  m_pDataObject->GetDataHere(pBuf);
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetDataHere"));
 
-  GlobalUnlock(pmedium->hGlobal);
+    // put data in caller provided medium
+    switch ( pmedium->tymed )
+    {
+        case TYMED_GDI:
+            if ( !m_pDataObject->GetDataHere(wxDF_BITMAP, &pmedium->hBitmap) )
+                return E_UNEXPECTED;
+            break;
+
+        case TYMED_ENHMF:
+            if ( !m_pDataObject->GetDataHere(wxDF_ENHMETAFILE,
+                                             &pmedium->hEnhMetaFile) )
+                return E_UNEXPECTED;
+            break;
+
+        case TYMED_MFPICT:
+            // fall through - we pass METAFILEPICT through HGLOBAL
+
+        case TYMED_HGLOBAL:
+            {
+                // copy data
+                HGLOBAL hGlobal = pmedium->hGlobal;
+                void *pBuf = GlobalLock(hGlobal);
+                if ( pBuf == NULL ) {
+                    wxLogLastError(wxT("GlobalLock"));
+                    return E_OUTOFMEMORY;
+                }
+
+                wxDataFormat format = pformatetc->cfFormat;
+                if ( !format.IsStandard() ) {
+                    // for custom formats, put the size with the data
+                    pBuf = m_pDataObject->SetSizeInBuffer( pBuf, GlobalSize(hGlobal), format );
+                }
+
+                if ( !m_pDataObject->GetDataHere(format, pBuf) )
+                    return E_UNEXPECTED;
+
+                GlobalUnlock(hGlobal);
+            }
+            break;
+
+        default:
+            return DV_E_TYMED;
+    }
 
-  return S_OK;
+    return S_OK;
 }
 
-// set data functions (not implemented)
+
+// set data functions
 STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc,
                                     STGMEDIUM *pmedium,
                                     BOOL       fRelease)
 {
-  wxLogTrace(_T("wxIDataObject::SetData"));
-  return E_NOTIMPL;
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::SetData"));
+
+    switch ( pmedium->tymed )
+    {
+        case TYMED_GDI:
+            m_pDataObject->SetData(wxDF_BITMAP, 0, &pmedium->hBitmap);
+            break;
+
+        case TYMED_ENHMF:
+            m_pDataObject->SetData(wxDF_ENHMETAFILE, 0, &pmedium->hEnhMetaFile);
+            break;
+
+        case TYMED_MFPICT:
+            // fall through - we pass METAFILEPICT through HGLOBAL
+        case TYMED_HGLOBAL:
+            {
+                wxDataFormat format = pformatetc->cfFormat;
+
+                // this is quite weird, but for file drag and drop, explorer
+                // calls our SetData() with the formats we do *not* support!
+                //
+                // as we can't fix this bug in explorer (it's a bug because it
+                // should only use formats returned by EnumFormatEtc), do the
+                // check here
+                if ( !m_pDataObject->IsSupported(format, wxDataObject::Set) ) {
+                    // go away!
+                    return DV_E_FORMATETC;
+                }
+
+                // copy data
+                const void *pBuf = GlobalLock(pmedium->hGlobal);
+                if ( pBuf == NULL ) {
+                    wxLogLastError(wxT("GlobalLock"));
+
+                    return E_OUTOFMEMORY;
+                }
+
+                // we've got a problem with SetData() here because the base
+                // class version requires the size parameter which we don't
+                // have anywhere in OLE data transfer - so we need to
+                // synthetise it for known formats and we suppose that all data
+                // in custom formats starts with a DWORD containing the size
+                size_t size;
+                switch ( format )
+                {
+                    case CF_TEXT:
+                    case CF_OEMTEXT:
+                        size = strlen((const char *)pBuf);
+                        break;
+#if !defined(__WATCOMC__) && ! (defined(__BORLANDC__) && (__BORLANDC__ < 0x500))
+                    case CF_UNICODETEXT:
+#if ( defined(__BORLANDC__) && (__BORLANDC__ > 0x530) ) \
+    || ( defined(__MWERKS__) && defined(__WXMSW__) )
+                        size = std::wcslen((const wchar_t *)pBuf) * sizeof(wchar_t);
+#else
+                        size = wxWcslen((const wchar_t *)pBuf) * sizeof(wchar_t);
+#endif
+                        break;
+#endif
+                    case CF_BITMAP:
+#ifndef __WXWINCE__
+                    case CF_HDROP:
+                        // these formats don't use size at all, anyhow (but
+                        // pass data by handle, which is always a single DWORD)
+                        size = 0;
+                        break;
+#endif
+
+                    case CF_DIB:
+                        // the handler will calculate size itself (it's too
+                        // complicated to do it here)
+                        size = 0;
+                        break;
+
+#ifndef __WXWINCE__
+                    case CF_METAFILEPICT:
+                        size = sizeof(METAFILEPICT);
+                        break;
+#endif
+                    default:
+                        {
+                            // we suppose that the size precedes the data
+                            pBuf = m_pDataObject->GetSizeFromBuffer( pBuf, &size, format );
+                            if (! format.IsStandard() ) {
+                                // see GetData for coresponding increment
+                                size -= m_pDataObject->GetBufferOffset( format  );
+                            }
+                        }
+                }
+
+                bool ok = m_pDataObject->SetData(format, size, pBuf);
+
+                GlobalUnlock(pmedium->hGlobal);
+
+                if ( !ok ) {
+                    return E_UNEXPECTED;
+                }
+            }
+            break;
+
+        default:
+            return DV_E_TYMED;
+    }
+
+    if ( fRelease ) {
+        // we own the medium, so we must release it - but do *not* free any
+        // data we pass by handle because we have copied it elsewhere
+        switch ( pmedium->tymed )
+        {
+            case TYMED_GDI:
+                pmedium->hBitmap = 0;
+                break;
+
+            case TYMED_MFPICT:
+                pmedium->hMetaFilePict = 0;
+                break;
+
+            case TYMED_ENHMF:
+                pmedium->hEnhMetaFile = 0;
+                break;
+        }
+
+        ReleaseStgMedium(pmedium);
+    }
+
+    return S_OK;
 }
 
 // information functions
 STDMETHODIMP wxIDataObject::QueryGetData(FORMATETC *pformatetc)
 {
-  // do we accept data in this format?
-  if ( pformatetc == NULL ) {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: invalid ptr."));
-    return E_INVALIDARG;
-  }
-
-  // the only one allowed by current COM implementation
-  if ( pformatetc->lindex != -1 ) {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: bad lindex %d"),
-               pformatetc->lindex);
-    return DV_E_LINDEX;
-  }
-
-  // we don't support anything other (THUMBNAIL, ICON, DOCPRINT...)
-  if ( pformatetc->dwAspect != DVASPECT_CONTENT ) {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: bad dwAspect %d"),
-               pformatetc->dwAspect);
-    return DV_E_DVASPECT;
-  }
-
-  // @@ we only transfer data by global memory (bad for large amounts of it!)
-  if ( !(pformatetc->tymed & TYMED_HGLOBAL) ) {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: %s != TYMED_HGLOBAL."),
-               GetTymedName(pformatetc->tymed));
-    return DV_E_TYMED;
-  }
-
-  // and now check the type of data requested
-  if ( m_pDataObject->IsSupportedFormat((wxDataFormatId)pformatetc->cfFormat) ) {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: %s ok"),
-               wxDataObject::GetFormatName((wxDataFormatId)pformatetc->cfFormat));
+    // do we accept data in this format?
+    if ( pformatetc == NULL ) {
+        wxLogTrace(wxTRACE_OleCalls,
+                   wxT("wxIDataObject::QueryGetData: invalid ptr."));
+
+        return E_INVALIDARG;
+    }
+
+    // the only one allowed by current COM implementation
+    if ( pformatetc->lindex != -1 ) {
+        wxLogTrace(wxTRACE_OleCalls,
+                   wxT("wxIDataObject::QueryGetData: bad lindex %ld"),
+                   pformatetc->lindex);
+
+        return DV_E_LINDEX;
+    }
+
+    // we don't support anything other (THUMBNAIL, ICON, DOCPRINT...)
+    if ( pformatetc->dwAspect != DVASPECT_CONTENT ) {
+        wxLogTrace(wxTRACE_OleCalls,
+                   wxT("wxIDataObject::QueryGetData: bad dwAspect %ld"),
+                   pformatetc->dwAspect);
+
+        return DV_E_DVASPECT;
+    }
+
+    // and now check the type of data requested
+    wxDataFormat format = pformatetc->cfFormat;
+    if ( m_pDataObject->IsSupportedFormat(format) ) {
+        wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok"),
+                   wxGetFormatName(format));
+    }
+    else {
+        wxLogTrace(wxTRACE_OleCalls,
+                   wxT("wxIDataObject::QueryGetData: %s unsupported"),
+                   wxGetFormatName(format));
+
+        return DV_E_FORMATETC;
+    }
+
+    // we only transfer data by global memory, except for some particular cases
+    DWORD tymed = pformatetc->tymed;
+    if ( (format == wxDF_BITMAP && !(tymed & TYMED_GDI)) &&
+         !(tymed & TYMED_HGLOBAL) ) {
+        // it's not what we're waiting for
+        wxLogTrace(wxTRACE_OleCalls,
+                   wxT("wxIDataObject::QueryGetData: %s != %s"),
+                   GetTymedName(tymed),
+                   GetTymedName(format == wxDF_BITMAP ? TYMED_GDI
+                                                      : TYMED_HGLOBAL));
+
+        return DV_E_TYMED;
+    }
+
     return S_OK;
-  }
-  else {
-    wxLogTrace(_T("wxIDataObject::QueryGetData: %s unsupported"),
-               wxDataObject::GetFormatName((wxDataFormatId)pformatetc->cfFormat));
-    return DV_E_FORMATETC;
-  }
 }
 
-STDMETHODIMP wxIDataObject::GetCanonicalFormatEtc(FORMATETC *pFormatetcIn,
+STDMETHODIMP wxIDataObject::GetCanonicalFormatEtc(FORMATETC *WXUNUSED(pFormatetcIn),
                                                   FORMATETC *pFormatetcOut)
 {
-  wxLogTrace(_T("wxIDataObject::GetCanonicalFormatEtc"));
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetCanonicalFormatEtc"));
 
-  // @@ implementation is trivial, we might want something better here
-  if ( pFormatetcOut != NULL )
-    pFormatetcOut->ptd = NULL;
-  return DATA_S_SAMEFORMATETC;
+    // TODO we might want something better than this trivial implementation here
+    if ( pFormatetcOut != NULL )
+        pFormatetcOut->ptd = NULL;
+
+    return DATA_S_SAMEFORMATETC;
 }
 
-STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDirection,
+STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDir,
                                           IEnumFORMATETC **ppenumFormatEtc)
 {
-  wxLogTrace(_T("wxIDataObject::EnumFormatEtc"));
+    wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::EnumFormatEtc"));
+
+    wxDataObject::Direction dir = dwDir == DATADIR_GET ? wxDataObject::Get
+                                                       : wxDataObject::Set;
 
-  if ( dwDirection == DATADIR_SET ) {
-    // we don't allow setting of data anyhow
-    return E_NOTIMPL;
-  }
+    size_t nFormatCount = m_pDataObject->GetFormatCount(dir);
+    wxDataFormat format;
+    wxDataFormat *formats;
+    formats = nFormatCount == 1 ? &format : new wxDataFormat[nFormatCount];
+    m_pDataObject->GetAllFormats(formats, dir);
 
-  wxIEnumFORMATETC *pEnum =
-    new wxIEnumFORMATETC(m_pDataObject->GetPreferredFormat());
-  pEnum->AddRef();
-  *ppenumFormatEtc = pEnum;
+    wxIEnumFORMATETC *pEnum = new wxIEnumFORMATETC(formats, nFormatCount);
+    pEnum->AddRef();
+    *ppenumFormatEtc = pEnum;
+
+    if ( formats != &format ) {
+        delete [] formats;
+    }
 
-  return S_OK;
+    return S_OK;
 }
 
+// ----------------------------------------------------------------------------
 // advise sink functions (not implemented)
-STDMETHODIMP wxIDataObject::DAdvise(FORMATETC   *pformatetc,
-                                    DWORD        advf,
-                                    IAdviseSink *pAdvSink,
-                                    DWORD       *pdwConnection)
+// ----------------------------------------------------------------------------
+
+STDMETHODIMP wxIDataObject::DAdvise(FORMATETC   *WXUNUSED(pformatetc),
+                                    DWORD        WXUNUSED(advf),
+                                    IAdviseSink *WXUNUSED(pAdvSink),
+                                    DWORD       *WXUNUSED(pdwConnection))
 {
   return OLE_E_ADVISENOTSUPPORTED;
 }
 
-STDMETHODIMP wxIDataObject::DUnadvise(DWORD dwConnection)
+STDMETHODIMP wxIDataObject::DUnadvise(DWORD WXUNUSED(dwConnection))
 {
   return OLE_E_ADVISENOTSUPPORTED;
 }
 
-STDMETHODIMP wxIDataObject::EnumDAdvise(IEnumSTATDATA **ppenumAdvise)
+STDMETHODIMP wxIDataObject::EnumDAdvise(IEnumSTATDATA **WXUNUSED(ppenumAdvise))
 {
   return OLE_E_ADVISENOTSUPPORTED;
 }
@@ -383,117 +669,575 @@ STDMETHODIMP wxIDataObject::EnumDAdvise(IEnumSTATDATA **ppenumAdvise)
 
 wxDataObject::wxDataObject()
 {
-  m_pIDataObject = new wxIDataObject(this);
-  m_pIDataObject->AddRef();
+    m_pIDataObject = new wxIDataObject(this);
+    m_pIDataObject->AddRef();
 }
 
 wxDataObject::~wxDataObject()
 {
-  m_pIDataObject->Release();
+    ReleaseInterface(m_pIDataObject);
+}
+
+void wxDataObject::SetAutoDelete()
+{
+    ((wxIDataObject *)m_pIDataObject)->SetDeleteFlag();
+    m_pIDataObject->Release();
+
+    // so that the dtor doesnt' crash
+    m_pIDataObject = NULL;
+}
+
+size_t wxDataObject::GetBufferOffset( const wxDataFormat& WXUNUSED(format) )
+{
+    return sizeof(size_t);
+}
+
+const void* wxDataObject::GetSizeFromBuffer( const void* buffer, size_t* size,
+                                             const wxDataFormat& WXUNUSED(format) )
+{
+    size_t* p = (size_t*)buffer;
+    *size = *p;
+
+    return p + 1;
 }
 
-const char *wxDataObject::GetFormatName(wxDataFormat format)
+void* wxDataObject::SetSizeInBuffer( void* buffer, size_t size,
+                                       const wxDataFormat& WXUNUSED(format) )
 {
+    size_t* p = (size_t*)buffer;
+    *p = size;
+
+    return p + 1;
+}
+
 #ifdef __WXDEBUG__
-  // case 'xxx' is not a valid value for switch of enum 'wxDataFormat'
-  #ifdef __VISUALC__
-    #pragma warning(disable:4063)
-  #endif // VC++
-
-  static char s_szBuf[128];
-  switch ( format ) {
-    case CF_TEXT:         return "CF_TEXT";
-    case CF_BITMAP:       return "CF_BITMAP";
-    case CF_METAFILEPICT: return "CF_METAFILEPICT";
-    case CF_SYLK:         return "CF_SYLK";
-    case CF_DIF:          return "CF_DIF";
-    case CF_TIFF:         return "CF_TIFF";
-    case CF_OEMTEXT:      return "CF_OEMTEXT";
-    case CF_DIB:          return "CF_DIB";
-    case CF_PALETTE:      return "CF_PALETTE";
-    case CF_PENDATA:      return "CF_PENDATA";
-    case CF_RIFF:         return "CF_RIFF";
-    case CF_WAVE:         return "CF_WAVE";
-    case CF_UNICODETEXT:  return "CF_UNICODETEXT";
-    case CF_ENHMETAFILE:  return "CF_ENHMETAFILE";
-    case CF_HDROP:        return "CF_HDROP";
-    case CF_LOCALE:       return "CF_LOCALE";
-    default:
-      sprintf(s_szBuf, "clipboard format %d (unknown)", format);
-      return s_szBuf;
-  }
-
-  #ifdef __VISUALC__
-    #pragma warning(default:4063)
-  #endif // VC++
 
-#else // !Debug
-  return "";
+const wxChar *wxDataObject::GetFormatName(wxDataFormat format)
+{
+    // case 'xxx' is not a valid value for switch of enum 'wxDataFormat'
+    #ifdef __VISUALC__
+        #pragma warning(disable:4063)
+    #endif // VC++
+
+    static wxChar s_szBuf[256];
+    switch ( format ) {
+        case CF_TEXT:         return wxT("CF_TEXT");
+        case CF_BITMAP:       return wxT("CF_BITMAP");
+        case CF_METAFILEPICT: return wxT("CF_METAFILEPICT");
+        case CF_SYLK:         return wxT("CF_SYLK");
+        case CF_DIF:          return wxT("CF_DIF");
+        case CF_TIFF:         return wxT("CF_TIFF");
+        case CF_OEMTEXT:      return wxT("CF_OEMTEXT");
+        case CF_DIB:          return wxT("CF_DIB");
+        case CF_PALETTE:      return wxT("CF_PALETTE");
+        case CF_PENDATA:      return wxT("CF_PENDATA");
+        case CF_RIFF:         return wxT("CF_RIFF");
+        case CF_WAVE:         return wxT("CF_WAVE");
+        case CF_UNICODETEXT:  return wxT("CF_UNICODETEXT");
+        case CF_ENHMETAFILE:  return wxT("CF_ENHMETAFILE");
+        case CF_HDROP:        return wxT("CF_HDROP");
+        case CF_LOCALE:       return wxT("CF_LOCALE");
+
+        default:
+            if ( !::GetClipboardFormatName(format, s_szBuf, WXSIZEOF(s_szBuf)) )
+            {
+                // it must be a new predefined format we don't know the name of
+                wxSprintf(s_szBuf, wxT("unknown CF (0x%04x)"), format.GetFormatId());
+            }
+
+            return s_szBuf;
+    }
+
+    #ifdef __VISUALC__
+        #pragma warning(default:4063)
+    #endif // VC++
+}
+
 #endif // Debug
+
+// ----------------------------------------------------------------------------
+// wxBitmapDataObject supports CF_DIB format
+// ----------------------------------------------------------------------------
+
+size_t wxBitmapDataObject::GetDataSize() const
+{
+#if wxUSE_WXDIB
+    return wxDIB::ConvertFromBitmap(NULL, GetHbitmapOf(GetBitmap()));
+#else
+    return 0;
+#endif
+}
+
+bool wxBitmapDataObject::GetDataHere(void *buf) const
+{
+#if wxUSE_WXDIB
+    BITMAPINFO * const pbi = (BITMAPINFO *)buf;
+
+    return wxDIB::ConvertFromBitmap(pbi, GetHbitmapOf(GetBitmap())) != 0;
+#else
+    return FALSE;
+#endif
+}
+
+bool wxBitmapDataObject::SetData(size_t WXUNUSED(len), const void *buf)
+{
+#if wxUSE_WXDIB
+    const BITMAPINFO * const pbmi = (const BITMAPINFO *)buf;
+
+    HBITMAP hbmp = wxDIB::ConvertToBitmap(pbmi);
+
+    wxCHECK_MSG( hbmp, FALSE, wxT("pasting/dropping invalid bitmap") );
+
+    const BITMAPINFOHEADER * const pbmih = &pbmi->bmiHeader;
+    wxBitmap bitmap(pbmih->biWidth, pbmih->biHeight, pbmih->biBitCount);
+    bitmap.SetHBITMAP((WXHBITMAP)hbmp);
+
+    // TODO: create wxPalette if the bitmap has any
+
+    SetBitmap(bitmap);
+
+    return TRUE;
+#else
+    return FALSE;
+#endif
 }
 
 // ----------------------------------------------------------------------------
-// wxPrivateDataObject
+// wxBitmapDataObject2 supports CF_BITMAP format
 // ----------------------------------------------------------------------------
 
-wxPrivateDataObject::wxPrivateDataObject()
+// the bitmaps aren't passed by value as other types of data (i.e. by copying
+// the data into a global memory chunk and passing it to the clipboard or
+// another application or whatever), but by handle, so these generic functions
+// don't make much sense to them.
+
+size_t wxBitmapDataObject2::GetDataSize() const
 {
-    m_size = 0;
-    m_data = NULL;
+    return 0;
 }
 
-void wxPrivateDataObject::Free()
+bool wxBitmapDataObject2::GetDataHere(void *pBuf) const
 {
-    if ( m_data )
-        free(m_data);
+    // we put a bitmap handle into pBuf
+    *(WXHBITMAP *)pBuf = GetBitmap().GetHBITMAP();
+
+    return TRUE;
 }
 
-void wxPrivateDataObject::SetData( const void *data, size_t size )
+bool wxBitmapDataObject2::SetData(size_t WXUNUSED(len), const void *pBuf)
 {
-    Free();
+    HBITMAP hbmp = *(HBITMAP *)pBuf;
 
-    m_size = size;
-    m_data = malloc(size);
+    BITMAP bmp;
+    if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) )
+    {
+        wxLogLastError(wxT("GetObject(HBITMAP)"));
+    }
+
+    wxBitmap bitmap(bmp.bmWidth, bmp.bmHeight, bmp.bmPlanes);
+    bitmap.SetHBITMAP((WXHBITMAP)hbmp);
+
+    if ( !bitmap.Ok() ) {
+        wxFAIL_MSG(wxT("pasting/dropping invalid bitmap"));
+
+        return FALSE;
+    }
+
+    SetBitmap(bitmap);
+
+    return TRUE;
+}
+
+#if 0
+
+size_t wxBitmapDataObject::GetDataSize(const wxDataFormat& format) const
+{
+    if ( format.GetFormatId() == CF_DIB )
+    {
+        // create the DIB
+        ScreenHDC hdc;
+
+        // shouldn't be selected into a DC or GetDIBits() would fail
+        wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
+                      wxT("can't copy bitmap selected into wxMemoryDC") );
+
+        // first get the info
+        BITMAPINFO bi;
+        if ( !GetDIBits(hdc, (HBITMAP)m_bitmap.GetHBITMAP(), 0, 0,
+                        NULL, &bi, DIB_RGB_COLORS) )
+        {
+            wxLogLastError(wxT("GetDIBits(NULL)"));
+
+            return 0;
+        }
+
+        return sizeof(BITMAPINFO) + bi.bmiHeader.biSizeImage;
+    }
+    else // CF_BITMAP
+    {
+        // no data to copy - we don't pass HBITMAP via global memory
+        return 0;
+    }
+}
+
+bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format,
+                                     void *pBuf) const
+{
+    wxASSERT_MSG( m_bitmap.Ok(), wxT("copying invalid bitmap") );
+
+    HBITMAP hbmp = (HBITMAP)m_bitmap.GetHBITMAP();
+    if ( format.GetFormatId() == CF_DIB )
+    {
+        // create the DIB
+        ScreenHDC hdc;
+
+        // shouldn't be selected into a DC or GetDIBits() would fail
+        wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
+                      wxT("can't copy bitmap selected into wxMemoryDC") );
+
+        // first get the info
+        BITMAPINFO *pbi = (BITMAPINFO *)pBuf;
+        if ( !GetDIBits(hdc, hbmp, 0, 0, NULL, pbi, DIB_RGB_COLORS) )
+        {
+            wxLogLastError(wxT("GetDIBits(NULL)"));
+
+            return 0;
+        }
+
+        // and now copy the bits
+        if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1,
+                        pbi, DIB_RGB_COLORS) )
+        {
+            wxLogLastError(wxT("GetDIBits"));
+
+            return FALSE;
+        }
+    }
+    else // CF_BITMAP
+    {
+        // we put a bitmap handle into pBuf
+        *(HBITMAP *)pBuf = hbmp;
+    }
+
+    return TRUE;
+}
+
+bool wxBitmapDataObject::SetData(const wxDataFormat& format,
+                                 size_t size, const void *pBuf)
+{
+    HBITMAP hbmp;
+    if ( format.GetFormatId() == CF_DIB )
+    {
+        // here we get BITMAPINFO struct followed by the actual bitmap bits and
+        // BITMAPINFO starts with BITMAPINFOHEADER followed by colour info
+        ScreenHDC hdc;
+
+        BITMAPINFO *pbmi = (BITMAPINFO *)pBuf;
+        BITMAPINFOHEADER *pbmih = &pbmi->bmiHeader;
+        hbmp = CreateDIBitmap(hdc, pbmih, CBM_INIT,
+                              pbmi + 1, pbmi, DIB_RGB_COLORS);
+        if ( !hbmp )
+        {
+            wxLogLastError(wxT("CreateDIBitmap"));
+        }
+
+        m_bitmap.SetWidth(pbmih->biWidth);
+        m_bitmap.SetHeight(pbmih->biHeight);
+    }
+    else // CF_BITMAP
+    {
+        // it's easy with bitmaps: we pass them by handle
+        hbmp = *(HBITMAP *)pBuf;
+
+        BITMAP bmp;
+        if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) )
+        {
+            wxLogLastError(wxT("GetObject(HBITMAP)"));
+        }
+
+        m_bitmap.SetWidth(bmp.bmWidth);
+        m_bitmap.SetHeight(bmp.bmHeight);
+        m_bitmap.SetDepth(bmp.bmPlanes);
+    }
+
+    m_bitmap.SetHBITMAP((WXHBITMAP)hbmp);
+
+    wxASSERT_MSG( m_bitmap.Ok(), wxT("pasting invalid bitmap") );
+
+    return TRUE;
+}
+
+#endif // 0
+
+// ----------------------------------------------------------------------------
+// wxFileDataObject
+// ----------------------------------------------------------------------------
+
+bool wxFileDataObject::SetData(size_t WXUNUSED(size), const void *pData)
+{
+#ifndef __WXWINCE__
+    m_filenames.Empty();
+
+    // the documentation states that the first member of DROPFILES structure is
+    // a "DWORD offset of double NUL terminated file list". What they mean by
+    // this (I wonder if you see it immediately) is that the list starts at
+    // ((char *)&(pDropFiles.pFiles)) + pDropFiles.pFiles. We're also advised
+    // to use DragQueryFile to work with this structure, but not told where and
+    // how to get HDROP.
+    HDROP hdrop = (HDROP)pData;   // NB: it works, but I'm not sure about it
+
+    // get number of files (magic value -1)
+    UINT nFiles = ::DragQueryFile(hdrop, (unsigned)-1, NULL, 0u);
+
+    wxCHECK_MSG ( nFiles != (UINT)-1, FALSE, wxT("wrong HDROP handle") );
+
+    // for each file get the length, allocate memory and then get the name
+    wxString str;
+    UINT len, n;
+    for ( n = 0; n < nFiles; n++ ) {
+        // +1 for terminating NUL
+        len = ::DragQueryFile(hdrop, n, NULL, 0) + 1;
+
+        UINT len2 = ::DragQueryFile(hdrop, n, wxStringBuffer(str, len), len);
+        m_filenames.Add(str);
+
+        if ( len2 != len - 1 ) {
+            wxLogDebug(wxT("In wxFileDropTarget::OnDrop DragQueryFile returned\
+ %d characters, %d expected."), len2, len - 1);
+        }
+    }
+
+    return TRUE;
+#else
+    return FALSE;
+#endif
+}
+
+void wxFileDataObject::AddFile(const wxString& file)
+{
+    // just add file to filenames array
+    // all useful data (such as DROPFILES struct) will be
+    // created later as necessary
+    m_filenames.Add(file);
+}
+
+size_t wxFileDataObject::GetDataSize() const
+{
+#ifndef __WXWINCE__
+    // size returned will be the size of the DROPFILES structure,
+    // plus the list of filesnames (null byte separated), plus
+    // a double null at the end
+
+    // if no filenames in list, size is 0
+    if ( m_filenames.GetCount() == 0 )
+        return 0;
+
+    // inital size of DROPFILES struct + null byte
+    size_t sz = sizeof(DROPFILES) + 1;
+
+    size_t count = m_filenames.GetCount();
+    for ( size_t i = 0; i < count; i++ )
+    {
+        // add filename length plus null byte
+        sz += m_filenames[i].Len() + 1;
+    }
+
+    return sz;
+#else
+    return 0;
+#endif
+}
+
+bool wxFileDataObject::GetDataHere(void *pData) const
+{
+#ifndef __WXWINCE__
+    // pData points to an externally allocated memory block
+    // created using the size returned by GetDataSize()
+
+    // if pData is NULL, or there are no files, return
+    if ( !pData || m_filenames.GetCount() == 0 )
+        return FALSE;
+
+    // convert data pointer to a DROPFILES struct pointer
+    LPDROPFILES pDrop = (LPDROPFILES) pData;
+
+    // initialize DROPFILES struct
+    pDrop->pFiles = sizeof(DROPFILES);
+    pDrop->fNC = FALSE;                 // not non-client coords
+#if wxUSE_UNICODE
+    pDrop->fWide = TRUE;
+#else // ANSI
+    pDrop->fWide = FALSE;
+#endif // Unicode/Ansi
+
+    // set start of filenames list (null separated)
+    wxChar *pbuf = (wxChar*) ((BYTE *)pDrop + sizeof(DROPFILES));
+
+    size_t count = m_filenames.GetCount();
+    for (size_t i = 0; i < count; i++ )
+    {
+        // copy filename to pbuf and add null terminator
+        size_t len = m_filenames[i].Len();
+        memcpy(pbuf, m_filenames[i], len);
+        pbuf += len;
+        *pbuf++ = wxT('\0');
+    }
+
+    // add final null terminator
+    *pbuf = wxT('\0');
+
+    return TRUE;
+#else
+    return FALSE;
+#endif
+}
+
+// ----------------------------------------------------------------------------
+// wxURLDataObject
+// ----------------------------------------------------------------------------
+
+class CFSTR_SHELLURLDataObject : public wxCustomDataObject
+{
+public:
+    CFSTR_SHELLURLDataObject() : wxCustomDataObject(CFSTR_SHELLURL) {}
+protected:
+    virtual size_t GetBufferOffset( const wxDataFormat& WXUNUSED(format) )
+    {
+        return 0;
+    }
+
+    virtual const void* GetSizeFromBuffer( const void* buffer, size_t* size,
+                                           const wxDataFormat& WXUNUSED(format) )
+    {
+        // CFSTR_SHELLURL is _always_ ANSI text
+        *size = strlen( (const char*)buffer );
 
-    memcpy( m_data, data, size );
+        return buffer;
+    }
+
+    virtual void* SetSizeInBuffer( void* buffer, size_t WXUNUSED(size),
+                                   const wxDataFormat& WXUNUSED(format) )
+    {
+        return buffer;
+    }
+
+#if wxUSE_UNICODE
+    virtual bool GetDataHere( void* buffer ) const
+    {
+        // CFSTR_SHELLURL is _always_ ANSI!
+        wxCharBuffer char_buffer( GetDataSize() );
+        wxCustomDataObject::GetDataHere( (void*)char_buffer.data() );
+        wxString unicode_buffer( char_buffer, wxConvLibc );
+        memcpy( buffer, unicode_buffer.c_str(),
+                ( unicode_buffer.length() + 1 ) * sizeof(wxChar) );
+
+        return TRUE;
+    }
+    virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
+                             void *buf) const
+        { return GetDataHere(buf); }
+#endif
+
+    DECLARE_NO_COPY_CLASS(CFSTR_SHELLURLDataObject)
+};
+
+
+
+wxURLDataObject::wxURLDataObject()
+{
+    // we support CF_TEXT and CFSTR_SHELLURL formats which are basicly the same
+    // but it seems that some browsers only provide one of them so we have to
+    // support both
+    Add(new wxTextDataObject);
+    Add(new CFSTR_SHELLURLDataObject());
+
+    // we don't have any data yet
+    m_dataObjectLast = NULL;
 }
 
-void wxPrivateDataObject::WriteData( void *dest ) const
+bool wxURLDataObject::SetData(const wxDataFormat& format,
+                              size_t len,
+                              const void *buf)
 {
-    WriteData( m_data, dest );
+    m_dataObjectLast = GetObject(format);
+
+    wxCHECK_MSG( m_dataObjectLast, FALSE,
+                 wxT("unsupported format in wxURLDataObject"));
+
+    return m_dataObjectLast->SetData(len, buf);
 }
 
-size_t wxPrivateDataObject::GetSize() const
+wxString wxURLDataObject::GetURL() const
 {
-    return m_size;
+    wxString url;
+    wxCHECK_MSG( m_dataObjectLast, url, _T("no data in wxURLDataObject") );
+
+    size_t len = m_dataObjectLast->GetDataSize();
+
+    m_dataObjectLast->GetDataHere(wxStringBuffer(url, len));
+
+    return url;
 }
 
-void wxPrivateDataObject::WriteData( const void *data, void *dest ) const
+void wxURLDataObject::SetURL(const wxString& url)
 {
-    memcpy( dest, data, GetSize() );
+    SetData(wxDataFormat(wxUSE_UNICODE ? wxDF_UNICODETEXT : wxDF_TEXT),
+            url.Length()+1, url.c_str());
+
+    // CFSTR_SHELLURL is always supposed to be ANSI...
+    wxWX2MBbuf urlA = (wxWX2MBbuf)url.mbc_str();
+    size_t len = strlen(urlA);
+    SetData(wxDataFormat(CFSTR_SHELLURL), len+1, (const char*)urlA);
 }
 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
-static const char *GetTymedName(DWORD tymed)
-{
-  static char s_szBuf[128];
-  switch ( tymed ) {
-    case TYMED_HGLOBAL:   return "TYMED_HGLOBAL";
-    case TYMED_FILE:      return "TYMED_FILE";
-    case TYMED_ISTREAM:   return "TYMED_ISTREAM";
-    case TYMED_ISTORAGE:  return "TYMED_ISTORAGE";
-    case TYMED_GDI:       return "TYMED_GDI";
-    case TYMED_MFPICT:    return "TYMED_MFPICT";
-    case TYMED_ENHMF:     return "TYMED_ENHMF";
-    default:
-      sprintf(s_szBuf, "type of media format %d (unknown)", tymed);
-      return s_szBuf;
-  }
-}
-
-// TODO: OLE parts of wxBitmap/File/MetafileDataObject
+
+#ifdef __WXDEBUG__
+
+static const wxChar *GetTymedName(DWORD tymed)
+{
+    static wxChar s_szBuf[128];
+    switch ( tymed ) {
+        case TYMED_HGLOBAL:   return wxT("TYMED_HGLOBAL");
+        case TYMED_FILE:      return wxT("TYMED_FILE");
+        case TYMED_ISTREAM:   return wxT("TYMED_ISTREAM");
+        case TYMED_ISTORAGE:  return wxT("TYMED_ISTORAGE");
+        case TYMED_GDI:       return wxT("TYMED_GDI");
+        case TYMED_MFPICT:    return wxT("TYMED_MFPICT");
+        case TYMED_ENHMF:     return wxT("TYMED_ENHMF");
+        default:
+            wxSprintf(s_szBuf, wxT("type of media format %ld (unknown)"), tymed);
+            return s_szBuf;
+    }
+}
+
+#endif // Debug
+
+#else // not using OLE at all
+// ----------------------------------------------------------------------------
+// wxDataObject
+// ----------------------------------------------------------------------------
+
+wxDataObject::wxDataObject()
+{
+}
+
+wxDataObject::~wxDataObject()
+{
+}
+
+void wxDataObject::SetAutoDelete()
+{
+}
+
+#ifdef __WXDEBUG__
+const wxChar *wxDataObject::GetFormatName(wxDataFormat format)
+{
+    return NULL;
+}
+#endif
 
 #endif