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 #include "winbase.h"
  23 #include "wingdi.h"
  24 #include "winuser.h"
  25 #include "wine/debug.h"
  26 #include "ole2.h"
  27 #include "olestd.h"
  28 #include "winreg.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  31
  32 #define MAX_CLIPFORMAT_NAME   80
  33
  34 /******************************************************************************
  35  *              OleQueryCreateFromData [OLE32.117]
  36  *
  37  * Author   : Abey George
  38  * Checks whether an object can become an embedded object.
  39  * the clipboard or OLE drag and drop.
  40  * Returns  : S_OK - Format that supports Embedded object creation are present.
  41  *            OLE_E_STATIC - Format that supports static object creation are present.
  42  *            S_FALSE - No acceptable format is available.
  43  */
  44
  45 HRESULT WINAPI OleQueryCreateFromData(LPDATAOBJECT pSrcDataObject)
  46 {
  47   IEnumFORMATETC *pfmt;
  48   FORMATETC fmt;
  49   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
  50   BOOL bFoundStatic = FALSE;
  51
  52   HRESULT hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
  53
  54   if (hr == S_OK)
  55     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  56
  57   while (hr == S_OK)
  58   {
  59     GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
  60
  61     /* first, Check for Embedded Object, Embed Source or Filename */
  62
  63     if (!strcmp(szFmtName, CF_EMBEDDEDOBJECT) || !strcmp(szFmtName, CF_EMBEDSOURCE) || !strcmp(szFmtName, CF_FILENAME))
  64       return S_OK;
  65
  66     /* Check for Metafile, Bitmap or DIB */
  67
  68     if (fmt.cfFormat == CF_METAFILEPICT || fmt.cfFormat == CF_BITMAP || fmt.cfFormat == CF_DIB)
  69       bFoundStatic = TRUE;
  70
  71     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  72   }
  73
  74   /* Found a static format, but no embed format */
  75
  76   if (bFoundStatic)
  77     return OLE_S_STATIC;
  78
  79   return S_FALSE;
  80 }
  81
  82 /******************************************************************************
  83  *              OleCreateFromData        [OLE32.92]
  84  *
  85  * Author   : Abey George
  86  * Creates an embedded object from data transfer object retrieved from
  87  * the clipboard or OLE drag and drop.
  88  * Returns  : S_OK - Embedded object was created successfully.
  89  *            OLE_E_STATIC - OLE can create only a static object
  90  *            DV_E_FORMATETC - No acceptable format is available (only error return code)
  91  * TODO : CF_FILENAME, CF_EMBEDEDOBJECT formats. Parameter renderopt is currently ignored.
  92  */
  93
  94 HRESULT WINAPI OleCreateFromData(LPDATAOBJECT pSrcDataObject, REFIID riid,
  95                 DWORD renderopt, LPFORMATETC pFormatEtc,
  96                 LPOLECLIENTSITE pClientSite, LPSTORAGE pStg,
  97                 LPVOID* ppvObj)
  98 {
  99   IEnumFORMATETC *pfmt;
 100   FORMATETC fmt;
 101   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
 102   STGMEDIUM std;
 103   HRESULT hr;
 104   HRESULT hr1;
 105
 106   hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
 107
 108   if (hr == S_OK)
 109   {
 110     memset(&std, 0, sizeof(STGMEDIUM));
 111
 112     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 113     while (hr == S_OK)
 114     {
 115       GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
 116
 117       /* first, Check for Embedded Object, Embed Source or Filename */
 118       /* TODO: Currently checks only for Embed Source. */
 119
 120       if (!strcmp(szFmtName, CF_EMBEDSOURCE))
 121       {
 122         std.tymed = TYMED_HGLOBAL;
 123
 124         if ((hr1 = IDataObject_GetData(pSrcDataObject, &fmt, &std)) == S_OK)
 125         {
 126           ILockBytes *ptrILockBytes = 0;
 127           IStorage *pStorage = 0;
 128           IOleObject *pOleObject = 0;
 129           IPersistStorage *pPersistStorage = 0;
 130           CLSID clsID;
 131
 132           /* Create ILock bytes */
 133
 134           hr1 = CreateILockBytesOnHGlobal(std.u.hGlobal, FALSE, &ptrILockBytes);
 135
 136           /* Open storage on the ILock bytes */
 137
 138           if (hr1 == S_OK)
 139             hr1 = StgOpenStorageOnILockBytes(ptrILockBytes, NULL, STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage);
 140
 141           /* Get Class ID from the opened storage */
 142
 143           if (hr1 == S_OK)
 144             hr1 = ReadClassStg(pStorage, &clsID);
 145
 146           /* Create default handler for Persist storage */
 147
 148           if (hr1 == S_OK)
 149             hr1 = OleCreateDefaultHandler(&clsID, NULL, &IID_IPersistStorage, (LPVOID*)&pPersistStorage);
 150
 151           /* Load the storage to Persist storage */
 152
 153           if (hr1 == S_OK)
 154             hr1 = IPersistStorage_Load(pPersistStorage, pStorage);
 155
 156           /* Query for IOleObject */
 157
 158           if (hr1 == S_OK)
 159             hr1 = IPersistStorage_QueryInterface(pPersistStorage, &IID_IOleObject, (LPVOID*)&pOleObject);
 160
 161           /* Set client site with the IOleObject */
 162
 163           if (hr1 == S_OK)
 164             hr1 = IOleObject_SetClientSite(pOleObject, pClientSite);
 165
 166           IPersistStorage_Release(pPersistStorage);
 167           /* Query for the requested interface */
 168
 169           if (hr1 == S_OK)
 170             hr1 = IPersistStorage_QueryInterface(pPersistStorage, riid, ppvObj);
 171
 172           IPersistStorage_Release(pPersistStorage);
 173
 174           IStorage_Release(pStorage);
 175
 176           if (hr1 == S_OK)
 177             return S_OK;
 178         }
 179
 180         /* Return error */
 181
 182         return DV_E_FORMATETC;
 183       }
 184
 185       hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 186     }
 187   }
 188
 189   return DV_E_FORMATETC;
 190 }
 191