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 <stdarg.h>
  22 #include <string.h>
  23
  24 #define NONAMELESSUNION
  25 #define NONAMELESSSTRUCT
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "winuser.h"
  30 #include "wine/debug.h"
  31 #include "ole2.h"
  32 #include "olestd.h"
  33 #include "winreg.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  36
  37 #define MAX_CLIPFORMAT_NAME   80
  38
  39 /******************************************************************************
  40  *              OleQueryCreateFromData [OLE32.@]
  41  *
  42  * Author   : Abey George
  43  * Checks whether an object can become an embedded object.
  44  * the clipboard or OLE drag and drop.
  45  * Returns  : S_OK - Format that supports Embedded object creation are present.
  46  *            OLE_E_STATIC - Format that supports static object creation are present.
  47  *            S_FALSE - No acceptable format is available.
  48  */
  49
  50 HRESULT WINAPI OleQueryCreateFromData(LPDATAOBJECT pSrcDataObject)
  51 {
  52   IEnumFORMATETC *pfmt;
  53   FORMATETC fmt;
  54   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
  55   BOOL bFoundStatic = FALSE;
  56
  57   HRESULT hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
  58
  59   if (hr == S_OK)
  60     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  61
  62   while (hr == S_OK)
  63   {
  64     GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
  65
  66     /* first, Check for Embedded Object, Embed Source or Filename */
  67
  68     if (!strcmp(szFmtName, CF_EMBEDDEDOBJECT) || !strcmp(szFmtName, CF_EMBEDSOURCE) || !strcmp(szFmtName, CF_FILENAME))
  69       return S_OK;
  70
  71     /* Check for Metafile, Bitmap or DIB */
  72
  73     if (fmt.cfFormat == CF_METAFILEPICT || fmt.cfFormat == CF_BITMAP || fmt.cfFormat == CF_DIB)
  74       bFoundStatic = TRUE;
  75
  76     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  77   }
  78
  79   /* Found a static format, but no embed format */
  80
  81   if (bFoundStatic)
  82     return OLE_S_STATIC;
  83
  84   return S_FALSE;
  85 }
  86
  87 /******************************************************************************
  88  *              OleCreateFromData        [OLE32.@]
  89  *
  90  * Author   : Abey George
  91  * Creates an embedded object from data transfer object retrieved from
  92  * the clipboard or OLE drag and drop.
  93  * Returns  : S_OK - Embedded object was created successfully.
  94  *            OLE_E_STATIC - OLE can create only a static object
  95  *            DV_E_FORMATETC - No acceptable format is available (only error return code)
  96  * TODO : CF_FILENAME, CF_EMBEDEDOBJECT formats. Parameter renderopt is currently ignored.
  97  */
  98
  99 HRESULT WINAPI OleCreateFromData(LPDATAOBJECT pSrcDataObject, REFIID riid,
 100                 DWORD renderopt, LPFORMATETC pFormatEtc,
 101                 LPOLECLIENTSITE pClientSite, LPSTORAGE pStg,
 102                 LPVOID* ppvObj)
 103 {
 104   IEnumFORMATETC *pfmt;
 105   FORMATETC fmt;
 106   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
 107   STGMEDIUM std;
 108   HRESULT hr;
 109   HRESULT hr1;
 110
 111   hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
 112
 113   if (hr == S_OK)
 114   {
 115     memset(&std, 0, sizeof(STGMEDIUM));
 116
 117     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 118     while (hr == S_OK)
 119     {
 120       GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
 121
 122       /* first, Check for Embedded Object, Embed Source or Filename */
 123       /* TODO: Currently checks only for Embed Source. */
 124
 125       if (!strcmp(szFmtName, CF_EMBEDSOURCE))
 126       {
 127         std.tymed = TYMED_HGLOBAL;
 128
 129         if ((hr1 = IDataObject_GetData(pSrcDataObject, &fmt, &std)) == S_OK)
 130         {
 131           ILockBytes *ptrILockBytes = 0;
 132           IStorage *pStorage = 0;
 133           IOleObject *pOleObject = 0;
 134           IPersistStorage *pPersistStorage = 0;
 135           CLSID clsID;
 136
 137           /* Create ILock bytes */
 138
 139           hr1 = CreateILockBytesOnHGlobal(std.u.hGlobal, FALSE, &ptrILockBytes);
 140
 141           /* Open storage on the ILock bytes */
 142
 143           if (hr1 == S_OK)
 144             hr1 = StgOpenStorageOnILockBytes(ptrILockBytes, NULL, STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage);
 145
 146           /* Get Class ID from the opened storage */
 147
 148           if (hr1 == S_OK)
 149             hr1 = ReadClassStg(pStorage, &clsID);
 150
 151           /* Create default handler for Persist storage */
 152
 153           if (hr1 == S_OK)
 154             hr1 = OleCreateDefaultHandler(&clsID, NULL, &IID_IPersistStorage, (LPVOID*)&pPersistStorage);
 155
 156           /* Load the storage to Persist storage */
 157
 158           if (hr1 == S_OK)
 159             hr1 = IPersistStorage_Load(pPersistStorage, pStorage);
 160
 161           /* Query for IOleObject */
 162
 163           if (hr1 == S_OK)
 164             hr1 = IPersistStorage_QueryInterface(pPersistStorage, &IID_IOleObject, (LPVOID*)&pOleObject);
 165
 166           /* Set client site with the IOleObject */
 167
 168           if (hr1 == S_OK)
 169             hr1 = IOleObject_SetClientSite(pOleObject, pClientSite);
 170
 171           IPersistStorage_Release(pPersistStorage);
 172           /* Query for the requested interface */
 173
 174           if (hr1 == S_OK)
 175             hr1 = IPersistStorage_QueryInterface(pPersistStorage, riid, ppvObj);
 176
 177           IPersistStorage_Release(pPersistStorage);
 178
 179           IStorage_Release(pStorage);
 180
 181           if (hr1 == S_OK)
 182             return S_OK;
 183         }
 184
 185         /* Return error */
 186
 187         return DV_E_FORMATETC;
 188       }
 189
 190       hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 191     }
 192   }
 193
 194   return DV_E_FORMATETC;
 195 }