dlls/shell32/dataobject.c

   1 /*
   2  *      IEnumFORMATETC, IDataObject
   3  *
   4  * selecting and dropping 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22 #include <string.h>
  23
  24 #define COBJMACROS
  25 #define NONAMELESSUNION
  26 #define NONAMELESSSTRUCT
  27
  28 #include "windef.h"
  29 #include "wingdi.h"
  30 #include "pidl.h"
  31 #include "winerror.h"
  32 #include "shell32_main.h"
  33 #include "wine/debug.h"
  34 #include "undocshell.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  37
  38 /***********************************************************************
  39 *   IEnumFORMATETC implementation
  40 */
  41
  42 typedef struct
  43 {
  44     /* IUnknown fields */
  45     const IEnumFORMATETCVtbl *lpVtbl;
  46     LONG                      ref;
  47     /* IEnumFORMATETC fields */
  48     UINT        posFmt;
  49     UINT        countFmt;
  50     LPFORMATETC pFmt;
  51 } IEnumFORMATETCImpl;
  52
  53 static HRESULT WINAPI IEnumFORMATETC_fnQueryInterface(
  54                LPENUMFORMATETC iface, REFIID riid, LPVOID* ppvObj)
  55 {
  56         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
  57         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
  58
  59         *ppvObj = NULL;
  60
  61         if(IsEqualIID(riid, &IID_IUnknown))
  62         {
  63           *ppvObj = This;
  64         }
  65         else if(IsEqualIID(riid, &IID_IEnumFORMATETC))
  66         {
  67           *ppvObj = This;
  68         }
  69
  70         if(*ppvObj)
  71         {
  72           IUnknown_AddRef((IUnknown*)(*ppvObj));
  73           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
  74           return S_OK;
  75         }
  76         TRACE("-- Interface: E_NOINTERFACE\n");
  77         return E_NOINTERFACE;
  78 }
  79
  80 static ULONG WINAPI IEnumFORMATETC_fnAddRef(LPENUMFORMATETC iface)
  81 {
  82         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
  83         ULONG refCount = InterlockedIncrement(&This->ref);
  84
  85         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
  86
  87         return refCount;
  88 }
  89
  90 static ULONG WINAPI IEnumFORMATETC_fnRelease(LPENUMFORMATETC iface)
  91 {
  92         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
  93         ULONG refCount = InterlockedDecrement(&This->ref);
  94
  95         TRACE("(%p)->(%u)\n", This, refCount + 1);
  96
  97         if (!refCount)
  98         {
  99           TRACE(" destroying IEnumFORMATETC(%p)\n",This);
 100           SHFree (This->pFmt);
 101           HeapFree(GetProcessHeap(),0,This);
 102           return 0;
 103         }
 104         return refCount;
 105 }
 106
 107 static HRESULT WINAPI IEnumFORMATETC_fnNext(LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed)
 108 {
 109         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 110         UINT i;
 111
 112         TRACE("(%p)->(%u,%p)\n", This, celt, rgelt);
 113
 114         if(!This->pFmt)return S_FALSE;
 115         if(!rgelt) return E_INVALIDARG;
 116         if (pceltFethed)  *pceltFethed = 0;
 117
 118         for(i = 0; This->posFmt < This->countFmt && celt > i; i++)
 119         {
 120           *rgelt++ = This->pFmt[This->posFmt++];
 121         }
 122
 123         if (pceltFethed) *pceltFethed = i;
 124
 125         return ((i == celt) ? S_OK : S_FALSE);
 126 }
 127
 128 static HRESULT WINAPI IEnumFORMATETC_fnSkip(LPENUMFORMATETC iface, ULONG celt)
 129 {
 130         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 131         TRACE("(%p)->(num=%u)\n", This, celt);
 132
 133         if((This->posFmt + celt) >= This->countFmt) return S_FALSE;
 134         This->posFmt += celt;
 135         return S_OK;
 136 }
 137
 138 static HRESULT WINAPI IEnumFORMATETC_fnReset(LPENUMFORMATETC iface)
 139 {
 140         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 141         TRACE("(%p)->()\n", This);
 142
 143         This->posFmt = 0;
 144         return S_OK;
 145 }
 146
 147 static HRESULT WINAPI IEnumFORMATETC_fnClone(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum)
 148 {
 149         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 150         TRACE("(%p)->(ppenum=%p)\n", This, ppenum);
 151
 152         if (!ppenum) return E_INVALIDARG;
 153         *ppenum = IEnumFORMATETC_Constructor(This->countFmt, This->pFmt);
 154         if(*ppenum)
 155            IEnumFORMATETC_fnSkip(*ppenum, This->posFmt);
 156         return S_OK;
 157 }
 158
 159 static const IEnumFORMATETCVtbl efvt =
 160 {
 161     IEnumFORMATETC_fnQueryInterface,
 162     IEnumFORMATETC_fnAddRef,
 163     IEnumFORMATETC_fnRelease,
 164     IEnumFORMATETC_fnNext,
 165     IEnumFORMATETC_fnSkip,
 166     IEnumFORMATETC_fnReset,
 167     IEnumFORMATETC_fnClone
 168 };
 169
 170 LPENUMFORMATETC IEnumFORMATETC_Constructor(UINT cfmt, const FORMATETC afmt[])
 171 {
 172     IEnumFORMATETCImpl* ef;
 173     DWORD size=cfmt * sizeof(FORMATETC);
 174
 175     ef = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumFORMATETCImpl));
 176
 177     if(ef)
 178     {
 179         ef->ref=1;
 180         ef->lpVtbl=&efvt;
 181
 182         ef->countFmt = cfmt;
 183         ef->pFmt = SHAlloc (size);
 184
 185         if (ef->pFmt)
 186             memcpy(ef->pFmt, afmt, size);
 187     }
 188
 189     TRACE("(%p)->(%u,%p)\n",ef, cfmt, afmt);
 190     return (LPENUMFORMATETC)ef;
 191 }
 192
 193
 194 /***********************************************************************
 195 *   IDataObject implementation
 196 */
 197
 198 /* number of supported formats */
 199 #define MAX_FORMATS 4
 200
 201 typedef struct
 202 {
 203         /* IUnknown fields */
 204         const IDataObjectVtbl *lpVtbl;
 205         LONG            ref;
 206
 207         /* IDataObject fields */
 208         LPITEMIDLIST    pidl;
 209         LPITEMIDLIST *  apidl;
 210         UINT            cidl;
 211
 212         FORMATETC       pFormatEtc[MAX_FORMATS];
 213         UINT            cfShellIDList;
 214         UINT            cfFileNameA;
 215         UINT            cfFileNameW;
 216
 217 } IDataObjectImpl;
 218
 219 /***************************************************************************
 220 *  IDataObject_QueryInterface
 221 */
 222 static HRESULT WINAPI IDataObject_fnQueryInterface(LPDATAOBJECT iface, REFIID riid, LPVOID * ppvObj)
 223 {
 224         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 225         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 226
 227         *ppvObj = NULL;
 228
 229         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 230         {
 231           *ppvObj = This;
 232         }
 233         else if(IsEqualIID(riid, &IID_IDataObject))  /*IDataObject*/
 234         {
 235           *ppvObj = This;
 236         }
 237
 238         if(*ppvObj)
 239         {
 240           IUnknown_AddRef((IUnknown*)*ppvObj);
 241           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 242           return S_OK;
 243         }
 244         TRACE("-- Interface: E_NOINTERFACE\n");
 245         return E_NOINTERFACE;
 246 }
 247
 248 /**************************************************************************
 249 *  IDataObject_AddRef
 250 */
 251 static ULONG WINAPI IDataObject_fnAddRef(LPDATAOBJECT iface)
 252 {
 253         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 254         ULONG refCount = InterlockedIncrement(&This->ref);
 255
 256         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 257
 258         return refCount;
 259 }
 260
 261 /**************************************************************************
 262 *  IDataObject_Release
 263 */
 264 static ULONG WINAPI IDataObject_fnRelease(LPDATAOBJECT iface)
 265 {
 266         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 267         ULONG refCount = InterlockedDecrement(&This->ref);
 268
 269         TRACE("(%p)->(%u)\n", This, refCount + 1);
 270
 271         if (!refCount)
 272         {
 273           TRACE(" destroying IDataObject(%p)\n",This);
 274           _ILFreeaPidl(This->apidl, This->cidl);
 275           ILFree(This->pidl),
 276           HeapFree(GetProcessHeap(),0,This);
 277         }
 278         return refCount;
 279 }
 280
 281 /**************************************************************************
 282 * IDataObject_fnGetData
 283 */
 284 static HRESULT WINAPI IDataObject_fnGetData(LPDATAOBJECT iface, LPFORMATETC pformatetcIn, STGMEDIUM *pmedium)
 285 {
 286         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 287
 288         char    szTemp[256];
 289
 290         szTemp[0]=0;
 291         GetClipboardFormatNameA (pformatetcIn->cfFormat, szTemp, 256);
 292         TRACE("(%p)->(%p %p format=%s)\n", This, pformatetcIn, pmedium, szTemp);
 293
 294         if (pformatetcIn->cfFormat == This->cfShellIDList)
 295         {
 296           if (This->cidl < 1) return(E_UNEXPECTED);
 297           pmedium->u.hGlobal = RenderSHELLIDLIST(This->pidl, This->apidl, This->cidl);
 298         }
 299         else if (pformatetcIn->cfFormat == CF_HDROP)
 300         {
 301           if (This->cidl < 1) return(E_UNEXPECTED);
 302           pmedium->u.hGlobal = RenderHDROP(This->pidl, This->apidl, This->cidl);
 303         }
 304         else if (pformatetcIn->cfFormat == This->cfFileNameA)
 305         {
 306           if (This->cidl < 1) return(E_UNEXPECTED);
 307           pmedium->u.hGlobal = RenderFILENAMEA(This->pidl, This->apidl, This->cidl);
 308         }
 309         else if (pformatetcIn->cfFormat == This->cfFileNameW)
 310         {
 311           if (This->cidl < 1) return(E_UNEXPECTED);
 312           pmedium->u.hGlobal = RenderFILENAMEW(This->pidl, This->apidl, This->cidl);
 313         }
 314         else
 315         {
 316           FIXME("-- expected clipformat not implemented\n");
 317           return (E_INVALIDARG);
 318         }
 319         if (pmedium->u.hGlobal)
 320         {
 321           pmedium->tymed = TYMED_HGLOBAL;
 322           pmedium->pUnkForRelease = NULL;
 323           return S_OK;
 324         }
 325         return E_OUTOFMEMORY;
 326 }
 327
 328 static HRESULT WINAPI IDataObject_fnGetDataHere(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium)
 329 {
 330         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 331         FIXME("(%p)->()\n", This);
 332         return E_NOTIMPL;
 333 }
 334
 335 static HRESULT WINAPI IDataObject_fnQueryGetData(LPDATAOBJECT iface, LPFORMATETC pformatetc)
 336 {
 337         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 338         UINT i;
 339
 340         TRACE("(%p)->(fmt=0x%08x tym=0x%08x)\n", This, pformatetc->cfFormat, pformatetc->tymed);
 341
 342         if(!(DVASPECT_CONTENT & pformatetc->dwAspect))
 343           return DV_E_DVASPECT;
 344
 345         /* check our formats table what we have */
 346         for (i=0; i<MAX_FORMATS; i++)
 347         {
 348           if ((This->pFormatEtc[i].cfFormat == pformatetc->cfFormat)
 349            && (This->pFormatEtc[i].tymed == pformatetc->tymed))
 350           {
 351             return S_OK;
 352           }
 353         }
 354
 355         return DV_E_TYMED;
 356 }
 357
 358 static HRESULT WINAPI IDataObject_fnGetCanonicalFormatEtc(LPDATAOBJECT iface, LPFORMATETC pformatectIn, LPFORMATETC pformatetcOut)
 359 {
 360         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 361         FIXME("(%p)->()\n", This);
 362         return E_NOTIMPL;
 363 }
 364
 365 static HRESULT WINAPI IDataObject_fnSetData(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium, BOOL fRelease)
 366 {
 367         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 368         FIXME("(%p)->()\n", This);
 369         return E_NOTIMPL;
 370 }
 371
 372 static HRESULT WINAPI IDataObject_fnEnumFormatEtc(LPDATAOBJECT iface, DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc)
 373 {
 374         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 375
 376         TRACE("(%p)->()\n", This);
 377         *ppenumFormatEtc=NULL;
 378
 379         /* only get data */
 380         if (DATADIR_GET == dwDirection)
 381         {
 382           *ppenumFormatEtc = IEnumFORMATETC_Constructor(MAX_FORMATS, This->pFormatEtc);
 383           return (*ppenumFormatEtc) ? S_OK : E_FAIL;
 384         }
 385
 386         return E_NOTIMPL;
 387 }
 388
 389 static HRESULT WINAPI IDataObject_fnDAdvise(LPDATAOBJECT iface, FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, DWORD *pdwConnection)
 390 {
 391         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 392         FIXME("(%p)->()\n", This);
 393         return E_NOTIMPL;
 394 }
 395 static HRESULT WINAPI IDataObject_fnDUnadvise(LPDATAOBJECT iface, DWORD dwConnection)
 396 {
 397         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 398         FIXME("(%p)->()\n", This);
 399         return E_NOTIMPL;
 400 }
 401 static HRESULT WINAPI IDataObject_fnEnumDAdvise(LPDATAOBJECT iface, IEnumSTATDATA **ppenumAdvise)
 402 {
 403         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 404         FIXME("(%p)->()\n", This);
 405         return E_NOTIMPL;
 406 }
 407
 408 static const IDataObjectVtbl dtovt =
 409 {
 410         IDataObject_fnQueryInterface,
 411         IDataObject_fnAddRef,
 412         IDataObject_fnRelease,
 413         IDataObject_fnGetData,
 414         IDataObject_fnGetDataHere,
 415         IDataObject_fnQueryGetData,
 416         IDataObject_fnGetCanonicalFormatEtc,
 417         IDataObject_fnSetData,
 418         IDataObject_fnEnumFormatEtc,
 419         IDataObject_fnDAdvise,
 420         IDataObject_fnDUnadvise,
 421         IDataObject_fnEnumDAdvise
 422 };
 423
 424 /**************************************************************************
 425 *  IDataObject_Constructor
 426 */
 427 LPDATAOBJECT IDataObject_Constructor(HWND hwndOwner,
 428                LPCITEMIDLIST pMyPidl, LPCITEMIDLIST * apidl, UINT cidl)
 429 {
 430     IDataObjectImpl* dto;
 431
 432     dto = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDataObjectImpl));
 433
 434     if (dto)
 435     {
 436         dto->ref = 1;
 437         dto->lpVtbl = &dtovt;
 438         dto->pidl = ILClone(pMyPidl);
 439         dto->apidl = _ILCopyaPidl(apidl, cidl);
 440         dto->cidl = cidl;
 441
 442         dto->cfShellIDList = RegisterClipboardFormatW(CFSTR_SHELLIDLISTW);
 443         dto->cfFileNameA = RegisterClipboardFormatA(CFSTR_FILENAMEA);
 444         dto->cfFileNameW = RegisterClipboardFormatW(CFSTR_FILENAMEW);
 445         InitFormatEtc(dto->pFormatEtc[0], dto->cfShellIDList, TYMED_HGLOBAL);
 446         InitFormatEtc(dto->pFormatEtc[1], CF_HDROP, TYMED_HGLOBAL);
 447         InitFormatEtc(dto->pFormatEtc[2], dto->cfFileNameA, TYMED_HGLOBAL);
 448         InitFormatEtc(dto->pFormatEtc[3], dto->cfFileNameW, TYMED_HGLOBAL);
 449     }
 450
 451     TRACE("(%p)->(apidl=%p cidl=%u)\n",dto, apidl, cidl);
 452     return (LPDATAOBJECT)dto;
 453 }