/* * OLE 2 clipboard support * * Copyright 1999 Noel Borthwick * Copyright 2000 Abey George * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * * NOTES: * This file contains the implementation for the OLE Clipboard and its * internal interfaces. The OLE clipboard interacts with an IDataObject * interface via the OleSetClipboard, OleGetClipboard and * OleIsCurrentClipboard API's. An internal IDataObject delegates * to a client supplied IDataObject or the WIN32 clipboard API depending * on whether OleSetClipboard has been invoked. * Here are some operating scenarios: * * 1. OleSetClipboard called: In this case the internal IDataObject * delegates to the client supplied IDataObject. Additionally OLE takes * ownership of the Windows clipboard and any HGLOCBAL IDataObject * items are placed on the Windows clipboard. This allows non OLE aware * applications to access these. A local WinProc fields WM_RENDERFORMAT * and WM_RENDERALLFORMATS messages in this case. * * 2. OleGetClipboard called without previous OleSetClipboard. Here the internal * IDataObject functionality wraps around the WIN32 clipboard API. * * 3. OleGetClipboard called after previous OleSetClipboard. Here the internal * IDataObject delegates to the source IDataObjects functionality directly, * thereby bypassing the Windows clipboard. * * Implementation references : Inside OLE 2'nd edition by Kraig Brockschmidt * * TODO: * - Support for pasting between different processes. OLE clipboard support * currently works only for in process copy and paste. Since we internally * store a pointer to the source's IDataObject and delegate to that, this * will fail if the IDataObject client belongs to a different process. * - IDataObject::GetDataHere is not implemented * - OleFlushClipboard needs to additionally handle TYMED_IStorage media * by copying the storage into global memory. Subsequently the default * data object exposed through OleGetClipboard must convert this TYMED_HGLOBAL * back to TYMED_IStorage. * - OLE1 compatibility formats to be synthesized from OLE2 formats and put on * clipboard in OleSetClipboard. * */ #include #include #include #include #define COBJMACROS #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "windef.h" #include "winbase.h" #include "wingdi.h" #include "winuser.h" #include "winerror.h" #include "winnls.h" #include "ole2.h" #include "wine/debug.h" #include "olestd.h" #include "storage32.h" #include "compobj_private.h" WINE_DEFAULT_DEBUG_CHANNEL(ole); #define HANDLE_ERROR(err) do { hr = err; TRACE("(HRESULT=%x)\n", (HRESULT)err); goto CLEANUP; } while (0) /* Structure of 'Ole Private Data' clipboard format */ typedef struct { FORMATETC fmtetc; DWORD first_use; /* Has this cf been added to the list already */ DWORD unk[2]; } ole_priv_data_entry; typedef struct { DWORD unk1; DWORD size; /* in bytes of the entire structure */ DWORD unk2; DWORD count; /* no. of format entries */ DWORD unk3[2]; ole_priv_data_entry entries[1]; /* array of size count */ /* then follows any DVTARGETDEVICE structures referenced in the FORMATETCs */ } ole_priv_data; /***************************************************************************** * create_empty_priv_data * * Create an empty data structure. The only thing that really matters * here is setting count and size members. This is used by the enumerator as a * convenience when there's an empty list. */ static HRESULT create_empty_priv_data(ole_priv_data **data) { ole_priv_data *ptr; *data = NULL; ptr = HeapAlloc(GetProcessHeap(), 0, sizeof(*ptr)); if(!ptr) return E_OUTOFMEMORY; ptr->size = sizeof(*ptr); ptr->count = 0; *data = ptr; return S_OK; } /**************************************************************************** * ole_clipbrd */ typedef struct ole_clipbrd { const IDataObjectVtbl* lpvtbl; /* Exposed IDataObject vtable */ LONG ref; HWND window; /* Hidden clipboard window */ IDataObject *src_data; /* Source object passed to OleSetClipboard */ ole_priv_data *cached_enum; /* Cached result from the enumeration of src data object */ IStream *marshal_data; /* Stream onto which to marshal src_data */ } ole_clipbrd; static inline ole_clipbrd *impl_from_IDataObject(IDataObject *iface) { return (ole_clipbrd*)((char*)iface - FIELD_OFFSET(ole_clipbrd, lpvtbl)); } typedef struct PresentationDataHeader { BYTE unknown1[28]; DWORD dwObjectExtentX; DWORD dwObjectExtentY; DWORD dwSize; } PresentationDataHeader; /* * The one and only ole_clipbrd object which is created by OLEClipbrd_Initialize() */ static ole_clipbrd* theOleClipboard; static inline HRESULT get_ole_clipbrd(ole_clipbrd **clipbrd) { struct oletls *info = COM_CurrentInfo(); *clipbrd = NULL; if(!info->ole_inits) return CO_E_NOTINITIALIZED; *clipbrd = theOleClipboard; return S_OK; } /* * Name of our registered OLE clipboard window class */ static const WCHAR clipbrd_wndclass[] = {'C','L','I','P','B','R','D','W','N','D','C','L','A','S','S',0}; static const WCHAR wine_marshal_dataobject[] = {'W','i','n','e',' ','m','a','r','s','h','a','l',' ','d','a','t','a','o','b','j','e','c','t',0}; static UINT dataobject_clipboard_format; static UINT ole_priv_data_clipboard_format; static UINT embed_source_clipboard_format; static inline char *dump_fmtetc(FORMATETC *fmt) { static char buf[100]; snprintf(buf, sizeof(buf), "cf %04x ptd %p aspect %x lindex %d tymed %x", fmt->cfFormat, fmt->ptd, fmt->dwAspect, fmt->lindex, fmt->tymed); return buf; } /*---------------------------------------------------------------------* * Implementation of the internal IEnumFORMATETC interface returned by * the OLE clipboard's IDataObject. *---------------------------------------------------------------------*/ typedef struct enum_fmtetc { const IEnumFORMATETCVtbl *lpVtbl; LONG ref; UINT pos; /* current enumerator position */ ole_priv_data *data; } enum_fmtetc; static inline enum_fmtetc *impl_from_IEnumFORMATETC(IEnumFORMATETC *iface) { return (enum_fmtetc*)((char*)iface - FIELD_OFFSET(enum_fmtetc, lpVtbl)); } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_QueryInterface (IUnknown) * * See Windows documentation for more details on IUnknown methods. */ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_QueryInterface (LPENUMFORMATETC iface, REFIID riid, LPVOID* ppvObj) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); TRACE("(%p)->(IID: %s, %p)\n", This, debugstr_guid(riid), ppvObj); *ppvObj = NULL; if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IEnumFORMATETC)) { *ppvObj = iface; } if(*ppvObj) { IEnumFORMATETC_AddRef((IEnumFORMATETC*)*ppvObj); TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj); return S_OK; } TRACE("-- Interface: E_NOINTERFACE\n"); return E_NOINTERFACE; } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_AddRef (IUnknown) * */ static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_AddRef(LPENUMFORMATETC iface) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); TRACE("(%p)->(count=%u)\n",This, This->ref); return InterlockedIncrement(&This->ref); } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_Release (IUnknown) * * See Windows documentation for more details on IUnknown methods. */ static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_Release(LPENUMFORMATETC iface) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); ULONG ref; TRACE("(%p)->(count=%u)\n",This, This->ref); ref = InterlockedDecrement(&This->ref); if (!ref) { TRACE("() - destroying IEnumFORMATETC(%p)\n",This); HeapFree(GetProcessHeap(), 0, This->data); HeapFree(GetProcessHeap(), 0, This); } return ref; } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_Next (IEnumFORMATETC) * * Standard enumerator members for IEnumFORMATETC */ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Next (LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); UINT cfetch, i; HRESULT hres = S_FALSE; TRACE("(%p)->(pos=%u)\n", This, This->pos); if (This->pos < This->data->count) { cfetch = This->data->count - This->pos; if (cfetch >= celt) { cfetch = celt; hres = S_OK; } for(i = 0; i < cfetch; i++) { rgelt[i] = This->data->entries[This->pos++].fmtetc; if(rgelt[i].ptd) { DVTARGETDEVICE *target = (DVTARGETDEVICE *)((char *)This->data + (DWORD)rgelt[i].ptd); rgelt[i].ptd = CoTaskMemAlloc(target->tdSize); if(!rgelt[i].ptd) return E_OUTOFMEMORY; memcpy(rgelt[i].ptd, target, target->tdSize); } } } else { cfetch = 0; } if (pceltFethed) { *pceltFethed = cfetch; } return hres; } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_Skip (IEnumFORMATETC) * * Standard enumerator members for IEnumFORMATETC */ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Skip(LPENUMFORMATETC iface, ULONG celt) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); TRACE("(%p)->(num=%u)\n", This, celt); This->pos += celt; if (This->pos > This->data->count) { This->pos = This->data->count; return S_FALSE; } return S_OK; } /************************************************************************ * OLEClipbrd_IEnumFORMATETC_Reset (IEnumFORMATETC) * * Standard enumerator members for IEnumFORMATETC */ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Reset(LPENUMFORMATETC iface) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); TRACE("(%p)->()\n", This); This->pos = 0; return S_OK; } static HRESULT enum_fmtetc_construct(ole_priv_data *data, UINT pos, IEnumFORMATETC **obj); /************************************************************************ * OLEClipbrd_IEnumFORMATETC_Clone (IEnumFORMATETC) * * Standard enumerator members for IEnumFORMATETC */ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone (LPENUMFORMATETC iface, LPENUMFORMATETC* obj) { enum_fmtetc *This = impl_from_IEnumFORMATETC(iface); ole_priv_data *new_data; TRACE("(%p)->(%p)\n", This, obj); if ( !obj ) return E_INVALIDARG; *obj = NULL; new_data = HeapAlloc(GetProcessHeap(), 0, This->data->size); if(!new_data) return E_OUTOFMEMORY; return enum_fmtetc_construct(new_data, This->pos, obj); } static const IEnumFORMATETCVtbl efvt = { OLEClipbrd_IEnumFORMATETC_QueryInterface, OLEClipbrd_IEnumFORMATETC_AddRef, OLEClipbrd_IEnumFORMATETC_Release, OLEClipbrd_IEnumFORMATETC_Next, OLEClipbrd_IEnumFORMATETC_Skip, OLEClipbrd_IEnumFORMATETC_Reset, OLEClipbrd_IEnumFORMATETC_Clone }; /************************************************************************ * enum_fmtetc_construct * * Creates an IEnumFORMATETC enumerator from ole_priv_data which it then owns. */ static HRESULT enum_fmtetc_construct(ole_priv_data *data, UINT pos, IEnumFORMATETC **obj) { enum_fmtetc* ef; *obj = NULL; ef = HeapAlloc(GetProcessHeap(), 0, sizeof(*ef)); if (!ef) return E_OUTOFMEMORY; ef->ref = 1; ef->lpVtbl = &efvt; ef->data = data; ef->pos = pos; TRACE("(%p)->()\n", ef); *obj = (IEnumFORMATETC *)ef; return S_OK; } /*********************************************************************** * dup_global_mem * * Helper method to duplicate an HGLOBAL chunk of memory */ static HRESULT dup_global_mem( HGLOBAL src, DWORD flags, HGLOBAL *dst ) { void *src_ptr, *dst_ptr; DWORD size; *dst = NULL; if ( !src ) return S_FALSE; size = GlobalSize(src); *dst = GlobalAlloc( flags, size ); if ( !*dst ) return E_OUTOFMEMORY; src_ptr = GlobalLock(src); dst_ptr = GlobalLock(*dst); memcpy(dst_ptr, src_ptr, size); GlobalUnlock(*dst); GlobalUnlock(src); return S_OK; } /************************************************************ * render_embed_source_hack * * This is clearly a hack and has no place in the clipboard code. * */ static HRESULT render_embed_source_hack(IDataObject *data, LPFORMATETC fmt) { STGMEDIUM std; HGLOBAL hStorage = 0; HRESULT hr = S_OK; ILockBytes *ptrILockBytes; memset(&std, 0, sizeof(STGMEDIUM)); std.tymed = fmt->tymed = TYMED_ISTORAGE; hStorage = GlobalAlloc(GMEM_SHARE|GMEM_MOVEABLE, 0); if (hStorage == NULL) return E_OUTOFMEMORY; hr = CreateILockBytesOnHGlobal(hStorage, FALSE, &ptrILockBytes); hr = StgCreateDocfileOnILockBytes(ptrILockBytes, STGM_SHARE_EXCLUSIVE|STGM_READWRITE, 0, &std.u.pstg); ILockBytes_Release(ptrILockBytes); if (FAILED(hr = IDataObject_GetDataHere(theOleClipboard->src_data, fmt, &std))) { WARN("() : IDataObject_GetDataHere failed to render clipboard data! (%x)\n", hr); GlobalFree(hStorage); return hr; } if (1) /* check whether the presentation data is already -not- present */ { FORMATETC fmt2; STGMEDIUM std2; METAFILEPICT *mfp = 0; fmt2.cfFormat = CF_METAFILEPICT; fmt2.ptd = 0; fmt2.dwAspect = DVASPECT_CONTENT; fmt2.lindex = -1; fmt2.tymed = TYMED_MFPICT; memset(&std2, 0, sizeof(STGMEDIUM)); std2.tymed = TYMED_MFPICT; /* Get the metafile picture out of it */ if (SUCCEEDED(hr = IDataObject_GetData(theOleClipboard->src_data, &fmt2, &std2))) { mfp = GlobalLock(std2.u.hGlobal); } if (mfp) { OLECHAR name[]={ 2, 'O', 'l', 'e', 'P', 'r', 'e', 's', '0', '0', '0', 0}; IStream *pStream = 0; void *mfBits; PresentationDataHeader pdh; INT nSize; CLSID clsID; LPOLESTR strProgID; CHAR strOleTypeName[51]; BYTE OlePresStreamHeader [] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; nSize = GetMetaFileBitsEx(mfp->hMF, 0, NULL); memset(&pdh, 0, sizeof(PresentationDataHeader)); memcpy(&pdh, OlePresStreamHeader, sizeof(OlePresStreamHeader)); pdh.dwObjectExtentX = mfp->xExt; pdh.dwObjectExtentY = mfp->yExt; pdh.dwSize = nSize; hr = IStorage_CreateStream(std.u.pstg, name, STGM_CREATE|STGM_SHARE_EXCLUSIVE|STGM_READWRITE, 0, 0, &pStream); hr = IStream_Write(pStream, &pdh, sizeof(PresentationDataHeader), NULL); mfBits = HeapAlloc(GetProcessHeap(), 0, nSize); nSize = GetMetaFileBitsEx(mfp->hMF, nSize, mfBits); hr = IStream_Write(pStream, mfBits, nSize, NULL); IStream_Release(pStream); HeapFree(GetProcessHeap(), 0, mfBits); GlobalUnlock(std2.u.hGlobal); ReleaseStgMedium(&std2); ReadClassStg(std.u.pstg, &clsID); ProgIDFromCLSID(&clsID, &strProgID); WideCharToMultiByte( CP_ACP, 0, strProgID, -1, strOleTypeName, sizeof(strOleTypeName), NULL, NULL ); OLECONVERT_CreateOleStream(std.u.pstg); OLECONVERT_CreateCompObjStream(std.u.pstg, strOleTypeName); } } if ( !SetClipboardData( fmt->cfFormat, hStorage ) ) { WARN("() : Failed to set rendered clipboard data into clipboard!\n"); GlobalFree(hStorage); hr = CLIPBRD_E_CANT_SET; } ReleaseStgMedium(&std); return hr; } /************************************************************************ * find_format_in_list * * Returns the first entry that matches the provided clipboard format. */ static inline ole_priv_data_entry *find_format_in_list(ole_priv_data_entry *entries, DWORD num, UINT cf) { DWORD i; for(i = 0; i < num; i++) if(entries[i].fmtetc.cfFormat == cf) return &entries[i]; return NULL; } /*************************************************************************** * get_data_from_storage * * Returns storage data in an HGLOBAL. */ static HRESULT get_data_from_storage(IDataObject *data, FORMATETC *fmt, HGLOBAL *mem) { HGLOBAL h; IStorage *stg; HRESULT hr; FORMATETC stg_fmt; STGMEDIUM med; ILockBytes *lbs; *mem = NULL; h = GlobalAlloc( GMEM_DDESHARE|GMEM_MOVEABLE, 0 ); if(!h) return E_OUTOFMEMORY; hr = CreateILockBytesOnHGlobal(h, FALSE, &lbs); if(SUCCEEDED(hr)) { hr = StgCreateDocfileOnILockBytes(lbs, STGM_CREATE|STGM_SHARE_EXCLUSIVE|STGM_READWRITE, 0, &stg); ILockBytes_Release(lbs); } if(FAILED(hr)) { GlobalFree(h); return hr; } stg_fmt = *fmt; med.tymed = stg_fmt.tymed = TYMED_ISTORAGE; med.u.pstg = stg; med.pUnkForRelease = NULL; hr = IDataObject_GetDataHere(data, &stg_fmt, &med); if(FAILED(hr)) { med.u.pstg = NULL; hr = IDataObject_GetData(data, &stg_fmt, &med); if(FAILED(hr)) goto end; hr = IStorage_CopyTo(med.u.pstg, 0, NULL, NULL, stg); ReleaseStgMedium(&med); if(FAILED(hr)) goto end; } *mem = h; end: IStorage_Release(stg); if(FAILED(hr)) GlobalFree(h); return hr; } /*************************************************************************** * get_data_from_stream * * Returns stream data in an HGLOBAL. */ static HRESULT get_data_from_stream(IDataObject *data, FORMATETC *fmt, HGLOBAL *mem) { HGLOBAL h; IStream *stm = NULL; HRESULT hr; FORMATETC stm_fmt; STGMEDIUM med; *mem = NULL; h = GlobalAlloc( GMEM_DDESHARE|GMEM_MOVEABLE, 0 ); if(!h) return E_OUTOFMEMORY; hr = CreateStreamOnHGlobal(h, FALSE, &stm); if(FAILED(hr)) goto error; stm_fmt = *fmt; med.tymed = stm_fmt.tymed = TYMED_ISTREAM; med.u.pstm = stm; med.pUnkForRelease = NULL; hr = IDataObject_GetDataHere(data, &stm_fmt, &med); if(FAILED(hr)) { LARGE_INTEGER offs; ULARGE_INTEGER pos; med.u.pstm = NULL; hr = IDataObject_GetData(data, &stm_fmt, &med); if(FAILED(hr)) goto error; offs.QuadPart = 0; IStream_Seek(med.u.pstm, offs, STREAM_SEEK_CUR, &pos); IStream_Seek(med.u.pstm, offs, STREAM_SEEK_SET, NULL); hr = IStream_CopyTo(med.u.pstm, stm, pos, NULL, NULL); ReleaseStgMedium(&med); if(FAILED(hr)) goto error; } *mem = h; IStream_Release(stm); return S_OK; error: if(stm) IStream_Release(stm); GlobalFree(h); return hr; } /*************************************************************************** * get_data_from_global * * Returns global data in an HGLOBAL. */ static HRESULT get_data_from_global(IDataObject *data, FORMATETC *fmt, HGLOBAL *mem) { HGLOBAL h; HRESULT hr; FORMATETC mem_fmt; STGMEDIUM med; *mem = NULL; mem_fmt = *fmt; mem_fmt.tymed = TYMED_HGLOBAL; hr = IDataObject_GetData(data, &mem_fmt, &med); if(FAILED(hr)) return hr; hr = dup_global_mem(med.u.hGlobal, GMEM_DDESHARE|GMEM_MOVEABLE, &h); if(SUCCEEDED(hr)) *mem = h; ReleaseStgMedium(&med); return hr; } /*********************************************************************** * render_format * * Render the clipboard data. Note that this call will delegate to the * source data object. */ static HRESULT render_format(IDataObject *data, LPFORMATETC fmt) { HGLOBAL clip_data = NULL; HRESULT hr; /* Embed source hack */ if(fmt->cfFormat == embed_source_clipboard_format) { return render_embed_source_hack(data, fmt); } if(fmt->tymed & TYMED_ISTORAGE) { hr = get_data_from_storage(data, fmt, &clip_data); } else if(fmt->tymed & TYMED_ISTREAM) { hr = get_data_from_stream(data, fmt, &clip_data); } else if(fmt->tymed & TYMED_HGLOBAL) { hr = get_data_from_global(data, fmt, &clip_data); } else { FIXME("Unhandled tymed %x\n", fmt->tymed); hr = DV_E_FORMATETC; } if(SUCCEEDED(hr)) { if ( !SetClipboardData(fmt->cfFormat, clip_data) ) { WARN("() : Failed to set rendered clipboard data into clipboard!\n"); GlobalFree(clip_data); hr = CLIPBRD_E_CANT_SET; } } return hr; } /*---------------------------------------------------------------------* * Implementation of the internal IDataObject interface exposed by * the OLE clipboard. *---------------------------------------------------------------------*/ /************************************************************************ * OLEClipbrd_IDataObject_QueryInterface (IUnknown) * * See Windows documentation for more details on IUnknown methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_QueryInterface( IDataObject* iface, REFIID riid, void** ppvObject) { ole_clipbrd *This = impl_from_IDataObject(iface); TRACE("(%p)->(IID:%s, %p)\n", This, debugstr_guid(riid), ppvObject); if ( (This==0) || (ppvObject==0) ) return E_INVALIDARG; *ppvObject = 0; if (IsEqualIID(&IID_IUnknown, riid) || IsEqualIID(&IID_IDataObject, riid)) { *ppvObject = iface; } else { WARN( "() : asking for unsupported interface %s\n", debugstr_guid(riid)); return E_NOINTERFACE; } IUnknown_AddRef((IUnknown*)*ppvObject); return S_OK; } /************************************************************************ * OLEClipbrd_IDataObject_AddRef (IUnknown) * * See Windows documentation for more details on IUnknown methods. */ static ULONG WINAPI OLEClipbrd_IDataObject_AddRef( IDataObject* iface) { ole_clipbrd *This = impl_from_IDataObject(iface); TRACE("(%p)->(count=%u)\n",This, This->ref); return InterlockedIncrement(&This->ref); } /*********************************************************************** * destroy_clipbrd_window * Destroy the clipboard window and unregister its class */ static void destroy_clipbrd_window(HWND hwnd) { static const WCHAR ole32W[] = {'o','l','e','3','2',0}; HINSTANCE hinst = GetModuleHandleW(ole32W); DestroyWindow(hwnd); UnregisterClassW( clipbrd_wndclass, hinst ); } static void OLEClipbrd_Destroy(ole_clipbrd* This) { TRACE("()\n"); if (!This) return; if ( This->window ) destroy_clipbrd_window(This->window); IStream_Release(This->marshal_data); HeapFree(GetProcessHeap(), 0, This); } /************************************************************************ * OLEClipbrd_IDataObject_Release (IUnknown) * * See Windows documentation for more details on IUnknown methods. */ static ULONG WINAPI OLEClipbrd_IDataObject_Release( IDataObject* iface) { ole_clipbrd *This = impl_from_IDataObject(iface); ULONG ref; TRACE("(%p)->(count=%u)\n",This, This->ref); ref = InterlockedDecrement(&This->ref); if (ref == 0) { OLEClipbrd_Destroy(This); } return ref; } /************************************************************ * get_current_ole_clip_window * * Return the window that owns the ole clipboard. * * If the clipboard is flushed or not owned by ole this will * return NULL. */ static HWND get_current_ole_clip_window(void) { HGLOBAL h; HWND *ptr, wnd; h = GetClipboardData(dataobject_clipboard_format); if(!h) return NULL; ptr = GlobalLock(h); if(!ptr) return NULL; wnd = *ptr; GlobalUnlock(h); return wnd; } /************************************************************ * get_current_dataobject * * Return an unmarshalled IDataObject if there is a current * (ie non-flushed) object on the ole clipboard. */ static HRESULT get_current_dataobject(IDataObject **data) { HRESULT hr = S_FALSE; HWND wnd = get_current_ole_clip_window(); HGLOBAL h; void *ptr; IStream *stm; LARGE_INTEGER pos; *data = NULL; if(!wnd) return S_FALSE; h = GetPropW(wnd, wine_marshal_dataobject); if(!h) return S_FALSE; ptr = GlobalLock(h); if(!ptr) return S_FALSE; hr = CreateStreamOnHGlobal(NULL, TRUE, &stm); if(FAILED(hr)) goto end; hr = IStream_Write(stm, ptr, GlobalSize(h), NULL); if(SUCCEEDED(hr)) { pos.QuadPart = 0; IStream_Seek(stm, pos, STREAM_SEEK_SET, NULL); hr = CoUnmarshalInterface(stm, &IID_IDataObject, (void**)data); } IStream_Release(stm); end: GlobalUnlock(h); return hr; } /************************************************************************ * OLEClipbrd_IDataObject_GetData (IDataObject) * */ static HRESULT WINAPI OLEClipbrd_IDataObject_GetData( IDataObject* iface, LPFORMATETC pformatetcIn, STGMEDIUM* pmedium) { HANDLE h, hData = 0; HRESULT hr; IDataObject *data; TRACE("(%p,%p,%p)\n", iface, pformatetcIn, pmedium); if ( !pformatetcIn || !pmedium ) return E_INVALIDARG; if ( !OpenClipboard(NULL)) return CLIPBRD_E_CANT_OPEN; hr = get_current_dataobject(&data); if ( hr == S_OK ) { hr = IDataObject_GetData(data, pformatetcIn, pmedium); IDataObject_Release(data); CloseClipboard(); return hr; } /* * Otherwise, get the data from the windows clipboard using GetClipboardData */ if ( pformatetcIn->lindex != -1 ) { hr = DV_E_FORMATETC; goto end; } if ( (pformatetcIn->tymed & TYMED_HGLOBAL) != TYMED_HGLOBAL ) { hr = DV_E_TYMED; goto end; } h = GetClipboardData(pformatetcIn->cfFormat); hr = dup_global_mem(h, GMEM_MOVEABLE, &hData); /* * Return the clipboard data in the storage medium structure */ pmedium->tymed = (hData == 0) ? TYMED_NULL : TYMED_HGLOBAL; pmedium->u.hGlobal = hData; pmedium->pUnkForRelease = NULL; end: if ( !CloseClipboard() ) return CLIPBRD_E_CANT_CLOSE; if(FAILED(hr)) return hr; return (hData == 0) ? DV_E_FORMATETC : S_OK; } /************************************************************************ * OLEClipbrd_IDataObject_GetDataHere (IDataObject) */ static HRESULT WINAPI OLEClipbrd_IDataObject_GetDataHere( IDataObject* iface, LPFORMATETC pformatetc, STGMEDIUM* pmedium) { FIXME(": Stub\n"); return E_NOTIMPL; } /************************************************************************ * OLEClipbrd_IDataObject_QueryGetData (IDataObject) * * The OLE Clipboard's implementation of this method delegates to * a data source if there is one or wraps around the windows clipboard * function IsClipboardFormatAvailable() otherwise. * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_QueryGetData( IDataObject* iface, LPFORMATETC pformatetc) { TRACE("(%p, %p)\n", iface, pformatetc); if (!pformatetc) return E_INVALIDARG; if ( pformatetc->dwAspect != DVASPECT_CONTENT ) return DV_E_FORMATETC; if ( pformatetc->lindex != -1 ) return DV_E_FORMATETC; /* * Delegate to the Windows clipboard function IsClipboardFormatAvailable */ return (IsClipboardFormatAvailable(pformatetc->cfFormat)) ? S_OK : DV_E_CLIPFORMAT; } /************************************************************************ * OLEClipbrd_IDataObject_GetCanonicalFormatEtc (IDataObject) * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_GetCanonicalFormatEtc( IDataObject* iface, LPFORMATETC pformatectIn, LPFORMATETC pformatetcOut) { TRACE("(%p, %p, %p)\n", iface, pformatectIn, pformatetcOut); if ( !pformatectIn || !pformatetcOut ) return E_INVALIDARG; *pformatetcOut = *pformatectIn; return DATA_S_SAMEFORMATETC; } /************************************************************************ * OLEClipbrd_IDataObject_SetData (IDataObject) * * The OLE Clipboard's does not implement this method * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_SetData( IDataObject* iface, LPFORMATETC pformatetc, STGMEDIUM* pmedium, BOOL fRelease) { TRACE("\n"); return E_NOTIMPL; } /************************************************************************ * OLEClipbrd_IDataObject_EnumFormatEtc (IDataObject) * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_EnumFormatEtc( IDataObject* iface, DWORD dwDirection, IEnumFORMATETC** enum_fmt) { HRESULT hr = S_OK; HGLOBAL handle; ole_priv_data *data = NULL; TRACE("(%p, %x, %p)\n", iface, dwDirection, enum_fmt); *enum_fmt = NULL; if ( dwDirection != DATADIR_GET ) return E_NOTIMPL; if ( !OpenClipboard(NULL) ) return CLIPBRD_E_CANT_OPEN; handle = GetClipboardData( ole_priv_data_clipboard_format ); if(handle) { ole_priv_data *src = GlobalLock(handle); if(src) { /* FIXME: sanity check on size */ data = HeapAlloc(GetProcessHeap(), 0, src->size); if(!data) { GlobalUnlock(handle); hr = E_OUTOFMEMORY; goto end; } memcpy(data, src, src->size); GlobalUnlock(handle); } } if(!data) hr = create_empty_priv_data(&data); if(FAILED(hr)) goto end; hr = enum_fmtetc_construct( data, 0, enum_fmt ); end: if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE; return hr; } /************************************************************************ * OLEClipbrd_IDataObject_DAdvise (IDataObject) * * The OLE Clipboard's does not implement this method * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_DAdvise( IDataObject* iface, FORMATETC* pformatetc, DWORD advf, IAdviseSink* pAdvSink, DWORD* pdwConnection) { TRACE("\n"); return E_NOTIMPL; } /************************************************************************ * OLEClipbrd_IDataObject_DUnadvise (IDataObject) * * The OLE Clipboard's does not implement this method * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_DUnadvise( IDataObject* iface, DWORD dwConnection) { TRACE("\n"); return E_NOTIMPL; } /************************************************************************ * OLEClipbrd_IDataObject_EnumDAdvise (IDataObject) * * The OLE Clipboard does not implement this method * * See Windows documentation for more details on IDataObject methods. */ static HRESULT WINAPI OLEClipbrd_IDataObject_EnumDAdvise( IDataObject* iface, IEnumSTATDATA** ppenumAdvise) { TRACE("\n"); return E_NOTIMPL; } static const IDataObjectVtbl OLEClipbrd_IDataObject_VTable = { OLEClipbrd_IDataObject_QueryInterface, OLEClipbrd_IDataObject_AddRef, OLEClipbrd_IDataObject_Release, OLEClipbrd_IDataObject_GetData, OLEClipbrd_IDataObject_GetDataHere, OLEClipbrd_IDataObject_QueryGetData, OLEClipbrd_IDataObject_GetCanonicalFormatEtc, OLEClipbrd_IDataObject_SetData, OLEClipbrd_IDataObject_EnumFormatEtc, OLEClipbrd_IDataObject_DAdvise, OLEClipbrd_IDataObject_DUnadvise, OLEClipbrd_IDataObject_EnumDAdvise }; /*---------------------------------------------------------------------* * Internal implementation methods for the OLE clipboard *---------------------------------------------------------------------*/ /********************************************************* * Construct the OLEClipbrd class. */ static ole_clipbrd* OLEClipbrd_Construct(void) { ole_clipbrd* This; HGLOBAL h; This = HeapAlloc( GetProcessHeap(), 0, sizeof(*This) ); if (!This) return NULL; This->lpvtbl = &OLEClipbrd_IDataObject_VTable; This->ref = 1; This->window = NULL; This->src_data = NULL; This->cached_enum = NULL; h = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, 0); if(!h) goto error; if(FAILED(CreateStreamOnHGlobal(h, TRUE, &This->marshal_data))) goto error; return This; error: if(h) GlobalFree(h); HeapFree(GetProcessHeap(), 0, This); return NULL; } static void register_clipboard_formats(void) { static const WCHAR DataObjectW[] = { 'D','a','t','a','O','b','j','e','c','t',0 }; static const WCHAR OlePrivateDataW[] = { 'O','l','e',' ','P','r','i','v','a','t','e',' ','D','a','t','a',0 }; static const WCHAR EmbedSourceW[] = { 'E','m','b','e','d',' ','S','o','u','r','c','e',0 }; if(!dataobject_clipboard_format) dataobject_clipboard_format = RegisterClipboardFormatW(DataObjectW); if(!ole_priv_data_clipboard_format) ole_priv_data_clipboard_format = RegisterClipboardFormatW(OlePrivateDataW); if(!embed_source_clipboard_format) embed_source_clipboard_format = RegisterClipboardFormatW(EmbedSourceW); } /*********************************************************************** * OLEClipbrd_Initialize() * Initializes the OLE clipboard. */ void OLEClipbrd_Initialize(void) { register_clipboard_formats(); if ( !theOleClipboard ) { TRACE("()\n"); theOleClipboard = OLEClipbrd_Construct(); } } /*********************************************************************** * OLEClipbrd_UnInitialize() * Un-Initializes the OLE clipboard */ void OLEClipbrd_UnInitialize(void) { TRACE("()\n"); /* * Destroy the clipboard if no one holds a reference to us. * Note that the clipboard was created with a reference count of 1. */ if ( theOleClipboard && (theOleClipboard->ref <= 1) ) { OLEClipbrd_Destroy( theOleClipboard ); theOleClipboard = NULL; } else { WARN( "() : OLEClipbrd_UnInitialize called while client holds an IDataObject reference!\n"); } } /********************************************************************* * set_clipboard_formats * * Enumerate all formats supported by the source and make * those formats available using delayed rendering using SetClipboardData. * Cache the enumeration list and make that list visibile as the * 'Ole Private Data' format on the clipboard. * */ static HRESULT set_clipboard_formats(ole_clipbrd *clipbrd, IDataObject *data) { HRESULT hr; FORMATETC fmt; IEnumFORMATETC *enum_fmt; HGLOBAL priv_data_handle; DWORD target_offset; ole_priv_data *priv_data; DWORD count = 0, needed = sizeof(*priv_data), idx; hr = IDataObject_EnumFormatEtc(data, DATADIR_GET, &enum_fmt); if(FAILED(hr)) return hr; while(IEnumFORMATETC_Next(enum_fmt, 1, &fmt, NULL) == S_OK) { count++; needed += sizeof(priv_data->entries[0]); if(fmt.ptd) { needed += fmt.ptd->tdSize; CoTaskMemFree(fmt.ptd); } } /* Windows pads the list with two empty ole_priv_data_entries, one * after the entries array and one after the target device data. * Allocating with zero init to zero these pads. */ needed += sizeof(priv_data->entries[0]); /* initialisation of needed includes one of these. */ priv_data_handle = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE | GMEM_ZEROINIT, needed); priv_data = GlobalLock(priv_data_handle); priv_data->unk1 = 0; priv_data->size = needed; priv_data->unk2 = 1; priv_data->count = count; priv_data->unk3[0] = 0; priv_data->unk3[1] = 0; IEnumFORMATETC_Reset(enum_fmt); idx = 0; target_offset = FIELD_OFFSET(ole_priv_data, entries[count + 1]); /* count entries + one pad. */ while(IEnumFORMATETC_Next(enum_fmt, 1, &fmt, NULL) == S_OK) { TRACE("%s\n", dump_fmtetc(&fmt)); priv_data->entries[idx].fmtetc = fmt; if(fmt.ptd) { memcpy((char*)priv_data + target_offset, fmt.ptd, fmt.ptd->tdSize); priv_data->entries[idx].fmtetc.ptd = (DVTARGETDEVICE*)target_offset; target_offset += fmt.ptd->tdSize; CoTaskMemFree(fmt.ptd); } priv_data->entries[idx].first_use = !find_format_in_list(priv_data->entries, idx, fmt.cfFormat); priv_data->entries[idx].unk[0] = 0; priv_data->entries[idx].unk[1] = 0; if (priv_data->entries[idx].first_use) SetClipboardData(fmt.cfFormat, NULL); idx++; } IEnumFORMATETC_Release(enum_fmt); /* Cache the list and fixup any target device offsets to ptrs */ clipbrd->cached_enum = HeapAlloc(GetProcessHeap(), 0, needed); memcpy(clipbrd->cached_enum, priv_data, needed); for(idx = 0; idx < clipbrd->cached_enum->count; idx++) if(clipbrd->cached_enum->entries[idx].fmtetc.ptd) clipbrd->cached_enum->entries[idx].fmtetc.ptd = (DVTARGETDEVICE *)((char*)clipbrd->cached_enum + (DWORD)clipbrd->cached_enum->entries[idx].fmtetc.ptd); GlobalUnlock(priv_data_handle); SetClipboardData(ole_priv_data_clipboard_format, priv_data_handle); return S_OK; } static HWND create_clipbrd_window(void); /*********************************************************************** * get_clipbrd_window */ static inline HRESULT get_clipbrd_window(ole_clipbrd *clipbrd, HWND *wnd) { if ( !clipbrd->window ) clipbrd->window = create_clipbrd_window(); *wnd = clipbrd->window; return *wnd ? S_OK : E_FAIL; } /********************************************************************** * release_marshal_data * * Releases the data and sets the stream back to zero size. */ static inline void release_marshal_data(IStream *stm) { LARGE_INTEGER pos; ULARGE_INTEGER size; pos.QuadPart = size.QuadPart = 0; IStream_Seek(stm, pos, STREAM_SEEK_SET, NULL); CoReleaseMarshalData(stm); IStream_Seek(stm, pos, STREAM_SEEK_SET, NULL); IStream_SetSize(stm, size); } /*********************************************************************** * set_src_dataobject * * Clears and sets the clipboard's src IDataObject. * * To marshal the source dataobject we do something rather different from Windows. * We set a window prop which contains the marshalled data. * Windows set two props one of which is an IID, the other is an endpoint number. */ static HRESULT set_src_dataobject(ole_clipbrd *clipbrd, IDataObject *data) { HRESULT hr; HWND wnd; if(FAILED(hr = get_clipbrd_window(clipbrd, &wnd))) return hr; if(clipbrd->src_data) { RemovePropW(wnd, wine_marshal_dataobject); release_marshal_data(clipbrd->marshal_data); IDataObject_Release(clipbrd->src_data); clipbrd->src_data = NULL; HeapFree(GetProcessHeap(), 0, clipbrd->cached_enum); clipbrd->cached_enum = NULL; } if(data) { HGLOBAL h; IUnknown *unk; IDataObject_AddRef(data); clipbrd->src_data = data; IDataObject_QueryInterface(data, &IID_IUnknown, (void**)&unk); hr = CoMarshalInterface(clipbrd->marshal_data, &IID_IDataObject, unk, MSHCTX_LOCAL, NULL, MSHLFLAGS_TABLESTRONG); IUnknown_Release(unk); /* Don't hold a ref on IUnknown, we have one on IDataObject. */ if(FAILED(hr)) return hr; GetHGlobalFromStream(clipbrd->marshal_data, &h); SetPropW(wnd, wine_marshal_dataobject, h); hr = set_clipboard_formats(clipbrd, data); } return hr; } /*********************************************************************** * clipbrd_wndproc */ static LRESULT CALLBACK clipbrd_wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) { ole_clipbrd *clipbrd; get_ole_clipbrd(&clipbrd); switch (message) { case WM_RENDERFORMAT: { UINT cf = wparam; ole_priv_data_entry *entry; TRACE("(): WM_RENDERFORMAT(cfFormat=%x)\n", cf); entry = find_format_in_list(clipbrd->cached_enum->entries, clipbrd->cached_enum->count, cf); if(entry) render_format(clipbrd->src_data, &entry->fmtetc); break; } case WM_RENDERALLFORMATS: { DWORD i; ole_priv_data_entry *entries = clipbrd->cached_enum->entries; TRACE("(): WM_RENDERALLFORMATS\n"); for(i = 0; i < clipbrd->cached_enum->count; i++) { if(entries[i].first_use) render_format(clipbrd->src_data, &entries[i].fmtetc); } break; } case WM_DESTROYCLIPBOARD: { TRACE("(): WM_DESTROYCLIPBOARD\n"); set_src_dataobject(clipbrd, NULL); break; } default: return DefWindowProcW(hwnd, message, wparam, lparam); } return 0; } /*********************************************************************** * create_clipbrd_window */ static HWND create_clipbrd_window(void) { WNDCLASSEXW class; static const WCHAR ole32W[] = {'o','l','e','3','2',0}; static const WCHAR title[] = {'C','l','i','p','b','o','a','r','d','W','i','n','d','o','w',0}; HINSTANCE hinst = GetModuleHandleW(ole32W); class.cbSize = sizeof(class); class.style = 0; class.lpfnWndProc = clipbrd_wndproc; class.cbClsExtra = 0; class.cbWndExtra = 0; class.hInstance = hinst; class.hIcon = 0; class.hCursor = 0; class.hbrBackground = 0; class.lpszMenuName = NULL; class.lpszClassName = clipbrd_wndclass; class.hIconSm = NULL; RegisterClassExW(&class); return CreateWindowW(clipbrd_wndclass, title, WS_POPUP | WS_CLIPSIBLINGS | WS_OVERLAPPED, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hinst, 0); } /********************************************************************* * set_dataobject_format * * Windows creates a 'DataObject' clipboard format that contains the * clipboard window's HWND or NULL if the Ole clipboard has been flushed. */ static HRESULT set_dataobject_format(HWND hwnd) { HGLOBAL h = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, sizeof(hwnd)); HWND *data; if(!h) return E_OUTOFMEMORY; data = GlobalLock(h); *data = hwnd; GlobalUnlock(h); if(!SetClipboardData(dataobject_clipboard_format, h)) { GlobalFree(h); return CLIPBRD_E_CANT_SET; } return S_OK; } /*---------------------------------------------------------------------* * Win32 OLE clipboard API *---------------------------------------------------------------------*/ /*********************************************************************** * OleSetClipboard [OLE32.@] * Places a pointer to the specified data object onto the clipboard, * making the data object accessible to the OleGetClipboard function. * * RETURNS * * S_OK IDataObject pointer placed on the clipboard * CLIPBRD_E_CANT_OPEN OpenClipboard failed * CLIPBRD_E_CANT_EMPTY EmptyClipboard failed * CLIPBRD_E_CANT_CLOSE CloseClipboard failed * CLIPBRD_E_CANT_SET SetClipboard failed */ HRESULT WINAPI OleSetClipboard(IDataObject* data) { HRESULT hr; ole_clipbrd *clipbrd; HWND wnd; TRACE("(%p)\n", data); if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr; if(FAILED(hr = get_clipbrd_window(clipbrd, &wnd))) return hr; if ( !OpenClipboard(wnd) ) return CLIPBRD_E_CANT_OPEN; if ( !EmptyClipboard() ) { hr = CLIPBRD_E_CANT_EMPTY; goto end; } hr = set_src_dataobject(clipbrd, data); if(FAILED(hr)) goto end; hr = set_dataobject_format(wnd); end: if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE; if ( FAILED(hr) ) { set_src_dataobject(clipbrd, NULL); } return hr; } /*********************************************************************** * OleGetClipboard [OLE32.@] * Returns a pointer to our internal IDataObject which represents the conceptual * state of the Windows clipboard. If the current clipboard already contains * an IDataObject, our internal IDataObject will delegate to this object. */ HRESULT WINAPI OleGetClipboard(IDataObject** ppDataObj) { HRESULT hr; ole_clipbrd *clipbrd; TRACE("()\n"); if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr; hr = IDataObject_QueryInterface( (IDataObject*)&(clipbrd->lpvtbl), &IID_IDataObject, (void**)ppDataObj); return hr; } /****************************************************************************** * OleFlushClipboard [OLE32.@] * Renders the data from the source IDataObject into the windows clipboard * * TODO: OleFlushClipboard needs to additionally handle TYMED_IStorage media * by copying the storage into global memory. Subsequently the default * data object exposed through OleGetClipboard must convert this TYMED_HGLOBAL * back to TYMED_IStorage. */ HRESULT WINAPI OleFlushClipboard(void) { IEnumFORMATETC* penumFormatetc = NULL; FORMATETC rgelt; HRESULT hr; ole_clipbrd *clipbrd; HWND wnd; TRACE("()\n"); if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr; if(FAILED(hr = get_clipbrd_window(clipbrd, &wnd))) return hr; /* * Already flushed or no source DataObject? Nothing to do. */ if (!clipbrd->src_data) return S_OK; if (!OpenClipboard(wnd)) return CLIPBRD_E_CANT_OPEN; /* * Render all HGLOBAL formats supported by the source into * the windows clipboard. */ if ( FAILED( hr = IDataObject_EnumFormatEtc( clipbrd->src_data, DATADIR_GET, &penumFormatetc) )) goto end; while ( S_OK == IEnumFORMATETC_Next(penumFormatetc, 1, &rgelt, NULL) ) { if ( rgelt.tymed == TYMED_HGLOBAL ) { CHAR szFmtName[80]; TRACE("(cfFormat=%d:%s)\n", rgelt.cfFormat, GetClipboardFormatNameA(rgelt.cfFormat, szFmtName, sizeof(szFmtName)-1) ? szFmtName : ""); if ( FAILED(render_format( clipbrd->src_data, &rgelt )) ) continue; } } IEnumFORMATETC_Release(penumFormatetc); hr = set_dataobject_format(NULL); set_src_dataobject(clipbrd, NULL); end: if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE; return hr; } /*********************************************************************** * OleIsCurrentClipboard [OLE32.@] */ HRESULT WINAPI OleIsCurrentClipboard(IDataObject *data) { HRESULT hr; ole_clipbrd *clipbrd; TRACE("()\n"); if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr; if (data == NULL) return S_FALSE; return (data == clipbrd->src_data) ? S_OK : S_FALSE; }