dlls/shell32/dataobject.c

   1 /*
   2  *      IEnumFORMATETC, IDataObject
   3  *
   4  * selecting and droping objects within the shell and/or common dialogs
   5  *
   6  *      Copyright 1998, 1999    <juergen.schmied@metronet.de>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22 #include <string.h>
  23
  24 #include "pidl.h"
  25 #include "winerror.h"
  26 #include "shell32_main.h"
  27 #include "wine/debug.h"
  28 #include "undocshell.h"
  29 #include "wine/obj_dataobject.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  32
  33 /***********************************************************************
  34 *   IEnumFORMATETC implementation
  35 */
  36
  37 typedef struct
  38 {
  39     /* IUnknown fields */
  40     ICOM_VFIELD(IEnumFORMATETC);
  41     DWORD                        ref;
  42     /* IEnumFORMATETC fields */
  43     UINT        posFmt;
  44     UINT        countFmt;
  45     LPFORMATETC pFmt;
  46 } IEnumFORMATETCImpl;
  47
  48 static HRESULT WINAPI IEnumFORMATETC_fnQueryInterface(LPENUMFORMATETC iface, REFIID riid, LPVOID* ppvObj);
  49 static ULONG WINAPI IEnumFORMATETC_fnAddRef(LPENUMFORMATETC iface);
  50 static ULONG WINAPI IEnumFORMATETC_fnRelease(LPENUMFORMATETC iface);
  51 static HRESULT WINAPI IEnumFORMATETC_fnNext(LPENUMFORMATETC iface, ULONG celt, FORMATETC* rgelt, ULONG* pceltFethed);
  52 static HRESULT WINAPI IEnumFORMATETC_fnSkip(LPENUMFORMATETC iface, ULONG celt);
  53 static HRESULT WINAPI IEnumFORMATETC_fnReset(LPENUMFORMATETC iface);
  54 static HRESULT WINAPI IEnumFORMATETC_fnClone(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum);
  55
  56 static struct ICOM_VTABLE(IEnumFORMATETC) efvt =
  57 {
  58     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  59         IEnumFORMATETC_fnQueryInterface,
  60         IEnumFORMATETC_fnAddRef,
  61     IEnumFORMATETC_fnRelease,
  62     IEnumFORMATETC_fnNext,
  63     IEnumFORMATETC_fnSkip,
  64     IEnumFORMATETC_fnReset,
  65     IEnumFORMATETC_fnClone
  66 };
  67
  68 LPENUMFORMATETC IEnumFORMATETC_Constructor(UINT cfmt, const FORMATETC afmt[])
  69 {
  70         IEnumFORMATETCImpl* ef;
  71         DWORD size=cfmt * sizeof(FORMATETC);
  72
  73         ef=(IEnumFORMATETCImpl*)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumFORMATETCImpl));
  74
  75         if(ef)
  76         {
  77           ef->ref=1;
  78           ICOM_VTBL(ef)=&efvt;
  79
  80           ef->countFmt = cfmt;
  81           ef->pFmt = SHAlloc (size);
  82
  83           if (ef->pFmt)
  84           {
  85             memcpy(ef->pFmt, afmt, size);
  86           }
  87         }
  88
  89         TRACE("(%p)->(%u,%p)\n",ef, cfmt, afmt);
  90         return (LPENUMFORMATETC)ef;
  91 }
  92
  93 static HRESULT WINAPI IEnumFORMATETC_fnQueryInterface(LPENUMFORMATETC iface, REFIID riid, LPVOID* ppvObj)
  94 {
  95         ICOM_THIS(IEnumFORMATETCImpl,iface);
  96         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
  97
  98         *ppvObj = NULL;
  99
 100         if(IsEqualIID(riid, &IID_IUnknown))
 101         {
 102           *ppvObj = This;
 103         }
 104         else if(IsEqualIID(riid, &IID_IEnumFORMATETC))
 105         {
 106           *ppvObj = (IEnumFORMATETC*)This;
 107         }
 108
 109         if(*ppvObj)
 110         {
 111           IUnknown_AddRef((IUnknown*)(*ppvObj));
 112           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 113           return S_OK;
 114         }
 115         TRACE("-- Interface: E_NOINTERFACE\n");
 116         return E_NOINTERFACE;
 117
 118 }
 119
 120 static ULONG WINAPI IEnumFORMATETC_fnAddRef(LPENUMFORMATETC iface)
 121 {
 122         ICOM_THIS(IEnumFORMATETCImpl,iface);
 123         TRACE("(%p)->(count=%lu)\n",This, This->ref);
 124         return ++(This->ref);
 125 }
 126
 127 static ULONG WINAPI IEnumFORMATETC_fnRelease(LPENUMFORMATETC iface)
 128 {
 129         ICOM_THIS(IEnumFORMATETCImpl,iface);
 130         TRACE("(%p)->()\n",This);
 131
 132         if (!--(This->ref))
 133         {
 134           TRACE(" destroying IEnumFORMATETC(%p)\n",This);
 135           if (This->pFmt)
 136           {
 137             SHFree (This->pFmt);
 138           }
 139           HeapFree(GetProcessHeap(),0,This);
 140           return 0;
 141         }
 142         return This->ref;
 143 }
 144
 145 static HRESULT WINAPI IEnumFORMATETC_fnNext(LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed)
 146 {
 147         ICOM_THIS(IEnumFORMATETCImpl,iface);
 148         int i;
 149
 150         TRACE("(%p)->(%lu,%p)\n", This, celt, rgelt);
 151
 152         if(!This->pFmt)return S_FALSE;
 153         if(!rgelt) return E_INVALIDARG;
 154         if (pceltFethed)  *pceltFethed = 0;
 155
 156         for(i = 0; This->posFmt < This->countFmt && celt > i; i++)
 157         {
 158           *rgelt++ = This->pFmt[This->posFmt++];
 159         }
 160
 161         if (pceltFethed) *pceltFethed = i;
 162
 163         return ((i == celt) ? S_OK : S_FALSE);
 164 }
 165
 166 static HRESULT WINAPI IEnumFORMATETC_fnSkip(LPENUMFORMATETC iface, ULONG celt)
 167 {
 168         ICOM_THIS(IEnumFORMATETCImpl,iface);
 169         TRACE("(%p)->(num=%lu)\n", This, celt);
 170
 171         if((This->posFmt + celt) >= This->countFmt) return S_FALSE;
 172         This->posFmt += celt;
 173         return S_OK;
 174 }
 175
 176 static HRESULT WINAPI IEnumFORMATETC_fnReset(LPENUMFORMATETC iface)
 177 {
 178         ICOM_THIS(IEnumFORMATETCImpl,iface);
 179         TRACE("(%p)->()\n", This);
 180
 181         This->posFmt = 0;
 182         return S_OK;
 183 }
 184
 185 static HRESULT WINAPI IEnumFORMATETC_fnClone(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum)
 186 {
 187         ICOM_THIS(IEnumFORMATETCImpl,iface);
 188         TRACE("(%p)->(ppenum=%p)\n", This, ppenum);
 189
 190         if (!ppenum) return E_INVALIDARG;
 191         *ppenum = IEnumFORMATETC_Constructor(This->countFmt, This->pFmt);
 192         return S_OK;
 193 }
 194
 195
 196 /***********************************************************************
 197 *   IDataObject implementation
 198 */
 199
 200 /* number of supported formats */
 201 #define MAX_FORMATS 3
 202
 203 typedef struct
 204 {
 205         /* IUnknown fields */
 206         ICOM_VFIELD(IDataObject);
 207         DWORD           ref;
 208
 209         /* IDataObject fields */
 210         LPITEMIDLIST    pidl;
 211         LPITEMIDLIST *  apidl;
 212         UINT            cidl;
 213
 214         FORMATETC       pFormatEtc[MAX_FORMATS];
 215         UINT            cfShellIDList;
 216         UINT            cfFileName;
 217
 218 } IDataObjectImpl;
 219
 220 static struct ICOM_VTABLE(IDataObject) dtovt;
 221
 222 /**************************************************************************
 223 *  IDataObject_Constructor
 224 */
 225 LPDATAOBJECT IDataObject_Constructor(HWND hwndOwner, LPITEMIDLIST pMyPidl, LPITEMIDLIST * apidl, UINT cidl)
 226 {
 227         IDataObjectImpl* dto;
 228
 229         dto = (IDataObjectImpl*)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDataObjectImpl));
 230
 231         if (dto)
 232         {
 233           dto->ref = 1;
 234           ICOM_VTBL(dto) = &dtovt;
 235           dto->pidl = ILClone(pMyPidl);
 236           dto->apidl = _ILCopyaPidl(apidl, cidl);
 237           dto->cidl = cidl;
 238
 239           dto->cfShellIDList = RegisterClipboardFormatA(CFSTR_SHELLIDLIST);
 240           dto->cfFileName = RegisterClipboardFormatA(CFSTR_FILENAMEA);
 241           InitFormatEtc(dto->pFormatEtc[0], dto->cfShellIDList, TYMED_HGLOBAL);
 242           InitFormatEtc(dto->pFormatEtc[1], CF_HDROP, TYMED_HGLOBAL);
 243           InitFormatEtc(dto->pFormatEtc[2], dto->cfFileName, TYMED_HGLOBAL);
 244         }
 245
 246         TRACE("(%p)->(apidl=%p cidl=%u)\n",dto, apidl, cidl);
 247         return (LPDATAOBJECT)dto;
 248 }
 249
 250 /***************************************************************************
 251 *  IDataObject_QueryInterface
 252 */
 253 static HRESULT WINAPI IDataObject_fnQueryInterface(LPDATAOBJECT iface, REFIID riid, LPVOID * ppvObj)
 254 {
 255         ICOM_THIS(IDataObjectImpl,iface);
 256         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 257
 258         *ppvObj = NULL;
 259
 260         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 261         {
 262           *ppvObj = This;
 263         }
 264         else if(IsEqualIID(riid, &IID_IDataObject))  /*IDataObject*/
 265         {
 266           *ppvObj = (IDataObject*)This;
 267         }
 268
 269         if(*ppvObj)
 270         {
 271           IUnknown_AddRef((IUnknown*)*ppvObj);
 272           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 273           return S_OK;
 274         }
 275         TRACE("-- Interface: E_NOINTERFACE\n");
 276         return E_NOINTERFACE;
 277 }
 278
 279 /**************************************************************************
 280 *  IDataObject_AddRef
 281 */
 282 static ULONG WINAPI IDataObject_fnAddRef(LPDATAOBJECT iface)
 283 {
 284         ICOM_THIS(IDataObjectImpl,iface);
 285         TRACE("(%p)->(count=%lu)\n",This, This->ref);
 286         return ++(This->ref);
 287 }
 288
 289 /**************************************************************************
 290 *  IDataObject_Release
 291 */
 292 static ULONG WINAPI IDataObject_fnRelease(LPDATAOBJECT iface)
 293 {
 294         ICOM_THIS(IDataObjectImpl,iface);
 295         TRACE("(%p)->()\n",This);
 296
 297         if (!--(This->ref))
 298         {
 299           TRACE(" destroying IDataObject(%p)\n",This);
 300           _ILFreeaPidl(This->apidl, This->cidl);
 301           ILFree(This->pidl),
 302           HeapFree(GetProcessHeap(),0,This);
 303           return 0;
 304         }
 305         return This->ref;
 306 }
 307
 308 /**************************************************************************
 309 * IDataObject_fnGetData
 310 */
 311 static HRESULT WINAPI IDataObject_fnGetData(LPDATAOBJECT iface, LPFORMATETC pformatetcIn, STGMEDIUM *pmedium)
 312 {
 313         ICOM_THIS(IDataObjectImpl,iface);
 314
 315         char    szTemp[256];
 316
 317         szTemp[0]=0;
 318         GetClipboardFormatNameA (pformatetcIn->cfFormat, szTemp, 256);
 319         TRACE("(%p)->(%p %p format=%s)\n", This, pformatetcIn, pmedium, szTemp);
 320
 321         if (pformatetcIn->cfFormat == This->cfShellIDList)
 322         {
 323           if (This->cidl < 1) return(E_UNEXPECTED);
 324           pmedium->u.hGlobal = RenderSHELLIDLIST(This->pidl, This->apidl, This->cidl);
 325         }
 326         else if (pformatetcIn->cfFormat == CF_HDROP)
 327         {
 328           if (This->cidl < 1) return(E_UNEXPECTED);
 329           pmedium->u.hGlobal = RenderHDROP(This->pidl, This->apidl, This->cidl);
 330         }
 331         else if (pformatetcIn->cfFormat == This->cfFileName)
 332         {
 333           if (This->cidl < 1) return(E_UNEXPECTED);
 334           pmedium->u.hGlobal = RenderFILENAME(This->pidl, This->apidl, This->cidl);
 335         }
 336         else
 337         {
 338           FIXME("-- expected clipformat not implemented\n");
 339           return (E_INVALIDARG);
 340         }
 341         if (pmedium->u.hGlobal)
 342         {
 343           pmedium->tymed = TYMED_HGLOBAL;
 344           pmedium->pUnkForRelease = NULL;
 345           return S_OK;
 346         }
 347         return E_OUTOFMEMORY;
 348 }
 349
 350 static HRESULT WINAPI IDataObject_fnGetDataHere(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium)
 351 {
 352         ICOM_THIS(IDataObjectImpl,iface);
 353         FIXME("(%p)->()\n", This);
 354         return E_NOTIMPL;
 355 }
 356
 357 static HRESULT WINAPI IDataObject_fnQueryGetData(LPDATAOBJECT iface, LPFORMATETC pformatetc)
 358 {
 359         ICOM_THIS(IDataObjectImpl,iface);
 360         UINT i;
 361
 362         TRACE("(%p)->(fmt=0x%08x tym=0x%08lx)\n", This, pformatetc->cfFormat, pformatetc->tymed);
 363
 364         if(!(DVASPECT_CONTENT & pformatetc->dwAspect))
 365           return DV_E_DVASPECT;
 366
 367         /* check our formats table what we have */
 368         for (i=0; i<MAX_FORMATS; i++)
 369         {
 370           if ((This->pFormatEtc[i].cfFormat == pformatetc->cfFormat)
 371            && (This->pFormatEtc[i].tymed == pformatetc->tymed))
 372           {
 373             return S_OK;
 374           }
 375         }
 376
 377         return DV_E_TYMED;
 378 }
 379
 380 static HRESULT WINAPI IDataObject_fnGetCanonicalFormatEtc(LPDATAOBJECT iface, LPFORMATETC pformatectIn, LPFORMATETC pformatetcOut)
 381 {
 382         ICOM_THIS(IDataObjectImpl,iface);
 383         FIXME("(%p)->()\n", This);
 384         return E_NOTIMPL;
 385 }
 386
 387 static HRESULT WINAPI IDataObject_fnSetData(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium, BOOL fRelease)
 388 {
 389         ICOM_THIS(IDataObjectImpl,iface);
 390         FIXME("(%p)->()\n", This);
 391         return E_NOTIMPL;
 392 }
 393
 394 static HRESULT WINAPI IDataObject_fnEnumFormatEtc(LPDATAOBJECT iface, DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc)
 395 {
 396         ICOM_THIS(IDataObjectImpl,iface);
 397
 398         TRACE("(%p)->()\n", This);
 399         *ppenumFormatEtc=NULL;
 400
 401         /* only get data */
 402         if (DATADIR_GET == dwDirection)
 403         {
 404           *ppenumFormatEtc = IEnumFORMATETC_Constructor(MAX_FORMATS, This->pFormatEtc);
 405           return (*ppenumFormatEtc) ? S_OK : E_FAIL;
 406         }
 407
 408         return E_NOTIMPL;
 409 }
 410
 411 static HRESULT WINAPI IDataObject_fnDAdvise(LPDATAOBJECT iface, FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, DWORD *pdwConnection)
 412 {
 413         ICOM_THIS(IDataObjectImpl,iface);
 414         FIXME("(%p)->()\n", This);
 415         return E_NOTIMPL;
 416 }
 417 static HRESULT WINAPI IDataObject_fnDUnadvise(LPDATAOBJECT iface, DWORD dwConnection)
 418 {
 419         ICOM_THIS(IDataObjectImpl,iface);
 420         FIXME("(%p)->()\n", This);
 421         return E_NOTIMPL;
 422 }
 423 static HRESULT WINAPI IDataObject_fnEnumDAdvise(LPDATAOBJECT iface, IEnumSTATDATA **ppenumAdvise)
 424 {
 425         ICOM_THIS(IDataObjectImpl,iface);
 426         FIXME("(%p)->()\n", This);
 427         return E_NOTIMPL;
 428 }
 429
 430 static struct ICOM_VTABLE(IDataObject) dtovt =
 431 {
 432         ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 433         IDataObject_fnQueryInterface,
 434         IDataObject_fnAddRef,
 435         IDataObject_fnRelease,
 436         IDataObject_fnGetData,
 437         IDataObject_fnGetDataHere,
 438         IDataObject_fnQueryGetData,
 439         IDataObject_fnGetCanonicalFormatEtc,
 440         IDataObject_fnSetData,
 441         IDataObject_fnEnumFormatEtc,
 442         IDataObject_fnDAdvise,
 443         IDataObject_fnDUnadvise,
 444         IDataObject_fnEnumDAdvise
 445 };