dlls/ole32/ole2impl.c

   1 /*
   2  * Ole 2 Create functions implementation
   3  *
   4  * Copyright (C) 1999-2000 Abey George
   5  */
   6
   7 #include "ole2.h"
   8 #include "wingdi.h"
   9 #include "winuser.h"
  10 #include "debugtools.h"
  11 #include "olestd.h"
  12 #include "winreg.h"
  13
  14 DEFAULT_DEBUG_CHANNEL(ole)
  15
  16 #define MAX_CLIPFORMAT_NAME   80
  17
  18 /******************************************************************************
  19  * Function : OleQueryCreateFromData [OLE32.117]
  20  * Author   : Abey George
  21  * Checks whether an object can become an embedded object.
  22  * the clipboard or OLE drag and drop.
  23  * Returns  : S_OK - Format that supports Embedded object creation are present.
  24  *            OLE_E_STATIC - Format that supports static object creation are present.
  25  *            S_FALSE - No acceptable format is available.
  26  */
  27
  28 HRESULT WINAPI OleQueryCreateFromData(LPDATAOBJECT pSrcDataObject)
  29 {
  30   IEnumFORMATETC *pfmt;
  31   FORMATETC fmt;
  32   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
  33   BOOL bFoundStatic = FALSE;
  34
  35   HRESULT hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
  36
  37   if (hr == S_OK)
  38     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  39
  40   while (hr == S_OK)
  41   {
  42     GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
  43
  44     /* first, Check for Embedded Object, Embed Source or Filename */
  45
  46     if (!strcmp(szFmtName, CF_EMBEDDEDOBJECT) || !strcmp(szFmtName, CF_EMBEDSOURCE) || !strcmp(szFmtName, CF_FILENAME))
  47       return S_OK;
  48
  49     /* Check for Metafile, Bitmap or DIB */
  50
  51     if (fmt.cfFormat == CF_METAFILEPICT || fmt.cfFormat == CF_BITMAP || fmt.cfFormat == CF_DIB)
  52       bFoundStatic = TRUE;
  53
  54     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  55   }
  56
  57   /* Found a static format, but no embed format */
  58
  59   if (bFoundStatic)
  60     return OLE_S_STATIC;
  61
  62   return S_FALSE;
  63 }
  64
  65 /******************************************************************************
  66  * Function : OleCreateFromData        [OLE32.92]
  67  * Author   : Abey George
  68  * Creates an embedded object from data transfer object retrieved from
  69  * the clipboard or OLE drag and drop.
  70  * Returns  : S_OK - Embedded object was created successfully.
  71  *            OLE_E_STATIC - OLE can create only a static object
  72  *            DV_E_FORMATETC - No acceptable format is available (only error return code)
  73  * TODO : CF_FILENAME, CF_EMBEDEDOBJECT formats. Parameter renderopt is currently ignored.
  74  */
  75
  76 HRESULT WINAPI OleCreateFromData(LPDATAOBJECT pSrcDataObject, REFIID riid,
  77                 DWORD renderopt, LPFORMATETC pFormatEtc,
  78                 LPOLECLIENTSITE pClientSite, LPSTORAGE pStg,
  79                 LPVOID* ppvObj)
  80 {
  81   IEnumFORMATETC *pfmt;
  82   FORMATETC fmt;
  83   CHAR szFmtName[MAX_CLIPFORMAT_NAME];
  84   STGMEDIUM std;
  85   HRESULT hr;
  86   HRESULT hr1;
  87
  88   hr = IDataObject_EnumFormatEtc(pSrcDataObject, DATADIR_GET, &pfmt);
  89
  90   if (hr == S_OK)
  91   {
  92     memset(&std, 0, sizeof(STGMEDIUM));
  93
  94     hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
  95     while (hr == S_OK)
  96     {
  97       GetClipboardFormatNameA(fmt.cfFormat, szFmtName, MAX_CLIPFORMAT_NAME-1);
  98
  99       /* first, Check for Embedded Object, Embed Source or Filename */
 100       /* TODO: Currently checks only for Embed Source. */
 101
 102       if (!strcmp(szFmtName, CF_EMBEDSOURCE))
 103       {
 104         std.tymed = TYMED_HGLOBAL;
 105
 106         if ((hr1 = IDataObject_GetData(pSrcDataObject, &fmt, &std)) == S_OK)
 107         {
 108           ILockBytes *ptrILockBytes = 0;
 109           IStorage *pStorage = 0;
 110           IOleObject *pOleObject = 0;
 111           IPersistStorage *pPersistStorage = 0;
 112           CLSID clsID;
 113
 114           /* Create ILock bytes */
 115
 116           hr1 = CreateILockBytesOnHGlobal(std.u.hGlobal, FALSE, &ptrILockBytes);
 117
 118           /* Open storage on the ILock bytes */
 119
 120           if (hr1 == S_OK)
 121             hr1 = StgOpenStorageOnILockBytes(ptrILockBytes, NULL, STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage);
 122
 123           /* Get Class ID from the opened storage */
 124
 125           if (hr1 == S_OK)
 126             hr1 = ReadClassStg(pStorage, &clsID);
 127
 128           /* Create default handler for Persist storage */
 129
 130           if (hr1 == S_OK)
 131             hr1 = OleCreateDefaultHandler(&clsID, NULL, &IID_IPersistStorage, (LPVOID*)&pPersistStorage);
 132
 133           /* Load the storage to Persist storage */
 134
 135           if (hr1 == S_OK)
 136             hr1 = IPersistStorage_Load(pPersistStorage, pStorage);
 137
 138           /* Query for IOleObject */
 139
 140           if (hr1 == S_OK)
 141             hr1 = IPersistStorage_QueryInterface(pPersistStorage, &IID_IOleObject, (LPVOID*)&pOleObject);
 142
 143           /* Set client site with the IOleObject */
 144
 145           if (hr1 == S_OK)
 146             hr1 = IOleObject_SetClientSite(pOleObject, pClientSite);
 147
 148           IPersistStorage_Release(pPersistStorage);
 149           /* Query for the requested interface */
 150
 151           if (hr1 == S_OK)
 152             hr1 = IPersistStorage_QueryInterface(pPersistStorage, riid, ppvObj);
 153
 154           IPersistStorage_Release(pPersistStorage);
 155
 156           IStorage_Release(pStorage);
 157
 158           if (hr1 == S_OK)
 159             return S_OK;
 160         }
 161
 162         /* Return error */
 163
 164         return DV_E_FORMATETC;
 165       }
 166
 167       hr = IEnumFORMATETC_Next(pfmt, 1, &fmt, NULL);
 168     }
 169   }
 170
 171   return DV_E_FORMATETC;
 172 }
 173