dlls/ole32/ole2impl.c

   1 /*
   2  * Ole 2 Create functions implementation
   3  *
   4  * Copyright (C) 1999-2000 Abey George
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <string.h>
  22
  23 #define NONAMELESSUNION
  24 #define NONAMELESSSTRUCT
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "wine/debug.h"
  29 #include "ole2.h"
  30 #include "olestd.h"
  31 #include "winreg.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  34
  35 #define MAX_CLIPFORMAT_NAME   80
  36
  37 /******************************************************************************
  38  *              OleQueryCreateFromData [OLE32.117]
  39  *
  40  * Author   : Abey George
  41  * Checks whether an object can become an embedded object.
  42  * the clipboard or OLE drag and drop.
  43  * Returns  : S_OK - Format that supports Embedded object creation are present.
  44  *            OLE_E_STATIC - Format that supports static object creation are present.
  45  *            S_FALSE - No acceptable format is available.
  46  */
  47
  48 HRESULT WINAPI OleQueryCreateFromData(LPDATAOBJECT pSrcDataObject)
  49 {
  50   IEnumFORMATETC *pfmt;
  51   FORMATETC fmt;
  52   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
  53   BOOL bFoundStatic = FALSE;
  54
  55   HRESULT hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
  56
  57   if (hr == S_OK)
  58     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  59
  60   while (hr == S_OK)
  61   {
  62     GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
  63
  64     /* first, Check for Embedded Object, Embed Source or Filename */
  65
  66     if (!strcmp(szFmtName, CF_EMBEDDEDOBJECT) || !strcmp(szFmtName, CF_EMBEDSOURCE) || !strcmp(szFmtName, CF_FILENAME))
  67       return S_OK;
  68
  69     /* Check for Metafile, Bitmap or DIB */
  70
  71     if (fmt.cfFormat == CF_METAFILEPICT || fmt.cfFormat == CF_BITMAP || fmt.cfFormat == CF_DIB)
  72       bFoundStatic = TRUE;
  73
  74     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  75   }
  76
  77   /* Found a static format, but no embed format */
  78
  79   if (bFoundStatic)
  80     return OLE_S_STATIC;
  81
  82   return S_FALSE;
  83 }
  84
  85 /******************************************************************************
  86  *              OleCreateFromData        [OLE32.92]
  87  *
  88  * Author   : Abey George
  89  * Creates an embedded object from data transfer object retrieved from
  90  * the clipboard or OLE drag and drop.
  91  * Returns  : S_OK - Embedded object was created successfully.
  92  *            OLE_E_STATIC - OLE can create only a static object
  93  *            DV_E_FORMATETC - No acceptable format is available (only error return code)
  94  * TODO : CF_FILENAME, CF_EMBEDEDOBJECT formats. Parameter renderopt is currently ignored.
  95  */
  96
  97 HRESULT WINAPI OleCreateFromData(LPDATAOBJECT pSrcDataObject, REFIID riid,
  98                 DWORD renderopt, LPFORMATETC pFormatEtc,
  99                 LPOLECLIENTSITE pClientSite, LPSTORAGE pStg,
 100                 LPVOID* ppvObj)
 101 {
 102   IEnumFORMATETC *pfmt;
 103   FORMATETC fmt;
 104   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
 105   STGMEDIUM std;
 106   HRESULT hr;
 107   HRESULT hr1;
 108
 109   hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
 110
 111   if (hr == S_OK)
 112   {
 113     memset(&std, 0, sizeof(STGMEDIUM));
 114
 115     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 116     while (hr == S_OK)
 117     {
 118       GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
 119
 120       /* first, Check for Embedded Object, Embed Source or Filename */
 121       /* TODO: Currently checks only for Embed Source. */
 122
 123       if (!strcmp(szFmtName, CF_EMBEDSOURCE))
 124       {
 125         std.tymed = TYMED_HGLOBAL;
 126
 127         if ((hr1 = IDataObject_GetData(pSrcDataObject, &fmt, &std)) == S_OK)
 128         {
 129           ILockBytes *ptrILockBytes = 0;
 130           IStorage *pStorage = 0;
 131           IOleObject *pOleObject = 0;
 132           IPersistStorage *pPersistStorage = 0;
 133           CLSID clsID;
 134
 135           /* Create ILock bytes */
 136
 137           hr1 = CreateILockBytesOnHGlobal(std.u.hGlobal, FALSE, &ptrILockBytes);
 138
 139           /* Open storage on the ILock bytes */
 140
 141           if (hr1 == S_OK)
 142             hr1 = StgOpenStorageOnILockBytes(ptrILockBytes, NULL, STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage);
 143
 144           /* Get Class ID from the opened storage */
 145
 146           if (hr1 == S_OK)
 147             hr1 = ReadClassStg(pStorage, &clsID);
 148
 149           /* Create default handler for Persist storage */
 150
 151           if (hr1 == S_OK)
 152             hr1 = OleCreateDefaultHandler(&clsID, NULL, &IID_IPersistStorage, (LPVOID*)&pPersistStorage);
 153
 154           /* Load the storage to Persist storage */
 155
 156           if (hr1 == S_OK)
 157             hr1 = IPersistStorage_Load(pPersistStorage, pStorage);
 158
 159           /* Query for IOleObject */
 160
 161           if (hr1 == S_OK)
 162             hr1 = IPersistStorage_QueryInterface(pPersistStorage, &IID_IOleObject, (LPVOID*)&pOleObject);
 163
 164           /* Set client site with the IOleObject */
 165
 166           if (hr1 == S_OK)
 167             hr1 = IOleObject_SetClientSite(pOleObject, pClientSite);
 168
 169           IPersistStorage_Release(pPersistStorage);
 170           /* Query for the requested interface */
 171
 172           if (hr1 == S_OK)
 173             hr1 = IPersistStorage_QueryInterface(pPersistStorage, riid, ppvObj);
 174
 175           IPersistStorage_Release(pPersistStorage);
 176
 177           IStorage_Release(pStorage);
 178
 179           if (hr1 == S_OK)
 180             return S_OK;
 181         }
 182
 183         /* Return error */
 184
 185         return DV_E_FORMATETC;
 186       }
 187
 188       hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 189     }
 190   }
 191
 192   return DV_E_FORMATETC;
 193 }
 194