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 #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     IEnumFORMATETCVtbl *lpVtbl;
  46     DWORD                        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 = (IEnumFORMATETC*)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=%lu)\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)->(%lu)\n", This, refCount + 1);
  96
  97         if (!refCount)
  98         {
  99           TRACE(" destroying IEnumFORMATETC(%p)\n",This);
 100           if (This->pFmt)
 101           {
 102             SHFree (This->pFmt);
 103           }
 104           HeapFree(GetProcessHeap(),0,This);
 105           return 0;
 106         }
 107         return refCount;
 108 }
 109
 110 static HRESULT WINAPI IEnumFORMATETC_fnNext(LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed)
 111 {
 112         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 113         UINT i;
 114
 115         TRACE("(%p)->(%lu,%p)\n", This, celt, rgelt);
 116
 117         if(!This->pFmt)return S_FALSE;
 118         if(!rgelt) return E_INVALIDARG;
 119         if (pceltFethed)  *pceltFethed = 0;
 120
 121         for(i = 0; This->posFmt < This->countFmt && celt > i; i++)
 122         {
 123           *rgelt++ = This->pFmt[This->posFmt++];
 124         }
 125
 126         if (pceltFethed) *pceltFethed = i;
 127
 128         return ((i == celt) ? S_OK : S_FALSE);
 129 }
 130
 131 static HRESULT WINAPI IEnumFORMATETC_fnSkip(LPENUMFORMATETC iface, ULONG celt)
 132 {
 133         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 134         TRACE("(%p)->(num=%lu)\n", This, celt);
 135
 136         if((This->posFmt + celt) >= This->countFmt) return S_FALSE;
 137         This->posFmt += celt;
 138         return S_OK;
 139 }
 140
 141 static HRESULT WINAPI IEnumFORMATETC_fnReset(LPENUMFORMATETC iface)
 142 {
 143         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 144         TRACE("(%p)->()\n", This);
 145
 146         This->posFmt = 0;
 147         return S_OK;
 148 }
 149
 150 static HRESULT WINAPI IEnumFORMATETC_fnClone(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum)
 151 {
 152         IEnumFORMATETCImpl *This = (IEnumFORMATETCImpl *)iface;
 153         TRACE("(%p)->(ppenum=%p)\n", This, ppenum);
 154
 155         if (!ppenum) return E_INVALIDARG;
 156         *ppenum = IEnumFORMATETC_Constructor(This->countFmt, This->pFmt);
 157         if(*ppenum)
 158            IEnumFORMATETC_fnSkip(*ppenum, This->posFmt);
 159         return S_OK;
 160 }
 161
 162 static struct IEnumFORMATETCVtbl efvt =
 163 {
 164     IEnumFORMATETC_fnQueryInterface,
 165     IEnumFORMATETC_fnAddRef,
 166     IEnumFORMATETC_fnRelease,
 167     IEnumFORMATETC_fnNext,
 168     IEnumFORMATETC_fnSkip,
 169     IEnumFORMATETC_fnReset,
 170     IEnumFORMATETC_fnClone
 171 };
 172
 173 LPENUMFORMATETC IEnumFORMATETC_Constructor(UINT cfmt, const FORMATETC afmt[])
 174 {
 175     IEnumFORMATETCImpl* ef;
 176     DWORD size=cfmt * sizeof(FORMATETC);
 177
 178     ef = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IEnumFORMATETCImpl));
 179
 180     if(ef)
 181     {
 182         ef->ref=1;
 183         ef->lpVtbl=&efvt;
 184
 185         ef->countFmt = cfmt;
 186         ef->pFmt = SHAlloc (size);
 187
 188         if (ef->pFmt)
 189             memcpy(ef->pFmt, afmt, size);
 190     }
 191
 192     TRACE("(%p)->(%u,%p)\n",ef, cfmt, afmt);
 193     return (LPENUMFORMATETC)ef;
 194 }
 195
 196
 197 /***********************************************************************
 198 *   IDataObject implementation
 199 */
 200
 201 /* number of supported formats */
 202 #define MAX_FORMATS 4
 203
 204 typedef struct
 205 {
 206         /* IUnknown fields */
 207         IDataObjectVtbl *lpVtbl;
 208         DWORD           ref;
 209
 210         /* IDataObject fields */
 211         LPITEMIDLIST    pidl;
 212         LPITEMIDLIST *  apidl;
 213         UINT            cidl;
 214
 215         FORMATETC       pFormatEtc[MAX_FORMATS];
 216         UINT            cfShellIDList;
 217         UINT            cfFileNameA;
 218         UINT            cfFileNameW;
 219
 220 } IDataObjectImpl;
 221
 222 /***************************************************************************
 223 *  IDataObject_QueryInterface
 224 */
 225 static HRESULT WINAPI IDataObject_fnQueryInterface(LPDATAOBJECT iface, REFIID riid, LPVOID * ppvObj)
 226 {
 227         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 228         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 229
 230         *ppvObj = NULL;
 231
 232         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 233         {
 234           *ppvObj = This;
 235         }
 236         else if(IsEqualIID(riid, &IID_IDataObject))  /*IDataObject*/
 237         {
 238           *ppvObj = (IDataObject*)This;
 239         }
 240
 241         if(*ppvObj)
 242         {
 243           IUnknown_AddRef((IUnknown*)*ppvObj);
 244           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 245           return S_OK;
 246         }
 247         TRACE("-- Interface: E_NOINTERFACE\n");
 248         return E_NOINTERFACE;
 249 }
 250
 251 /**************************************************************************
 252 *  IDataObject_AddRef
 253 */
 254 static ULONG WINAPI IDataObject_fnAddRef(LPDATAOBJECT iface)
 255 {
 256         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 257         ULONG refCount = InterlockedIncrement(&This->ref);
 258
 259         TRACE("(%p)->(count=%lu)\n", This, refCount - 1);
 260
 261         return refCount;
 262 }
 263
 264 /**************************************************************************
 265 *  IDataObject_Release
 266 */
 267 static ULONG WINAPI IDataObject_fnRelease(LPDATAOBJECT iface)
 268 {
 269         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 270         ULONG refCount = InterlockedDecrement(&This->ref);
 271
 272         TRACE("(%p)->(%lu)\n", This, refCount + 1);
 273
 274         if (!refCount)
 275         {
 276           TRACE(" destroying IDataObject(%p)\n",This);
 277           _ILFreeaPidl(This->apidl, This->cidl);
 278           ILFree(This->pidl),
 279           HeapFree(GetProcessHeap(),0,This);
 280         }
 281         return refCount;
 282 }
 283
 284 /**************************************************************************
 285 * IDataObject_fnGetData
 286 */
 287 static HRESULT WINAPI IDataObject_fnGetData(LPDATAOBJECT iface, LPFORMATETC pformatetcIn, STGMEDIUM *pmedium)
 288 {
 289         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 290
 291         char    szTemp[256];
 292
 293         szTemp[0]=0;
 294         GetClipboardFormatNameA (pformatetcIn->cfFormat, szTemp, 256);
 295         TRACE("(%p)->(%p %p format=%s)\n", This, pformatetcIn, pmedium, szTemp);
 296
 297         if (pformatetcIn->cfFormat == This->cfShellIDList)
 298         {
 299           if (This->cidl < 1) return(E_UNEXPECTED);
 300           pmedium->u.hGlobal = RenderSHELLIDLIST(This->pidl, This->apidl, This->cidl);
 301         }
 302         else if (pformatetcIn->cfFormat == CF_HDROP)
 303         {
 304           if (This->cidl < 1) return(E_UNEXPECTED);
 305           pmedium->u.hGlobal = RenderHDROP(This->pidl, This->apidl, This->cidl);
 306         }
 307         else if (pformatetcIn->cfFormat == This->cfFileNameA)
 308         {
 309           if (This->cidl < 1) return(E_UNEXPECTED);
 310           pmedium->u.hGlobal = RenderFILENAMEA(This->pidl, This->apidl, This->cidl);
 311         }
 312         else if (pformatetcIn->cfFormat == This->cfFileNameW)
 313         {
 314           if (This->cidl < 1) return(E_UNEXPECTED);
 315           pmedium->u.hGlobal = RenderFILENAMEW(This->pidl, This->apidl, This->cidl);
 316         }
 317         else
 318         {
 319           FIXME("-- expected clipformat not implemented\n");
 320           return (E_INVALIDARG);
 321         }
 322         if (pmedium->u.hGlobal)
 323         {
 324           pmedium->tymed = TYMED_HGLOBAL;
 325           pmedium->pUnkForRelease = NULL;
 326           return S_OK;
 327         }
 328         return E_OUTOFMEMORY;
 329 }
 330
 331 static HRESULT WINAPI IDataObject_fnGetDataHere(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium)
 332 {
 333         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 334         FIXME("(%p)->()\n", This);
 335         return E_NOTIMPL;
 336 }
 337
 338 static HRESULT WINAPI IDataObject_fnQueryGetData(LPDATAOBJECT iface, LPFORMATETC pformatetc)
 339 {
 340         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 341         UINT i;
 342
 343         TRACE("(%p)->(fmt=0x%08x tym=0x%08lx)\n", This, pformatetc->cfFormat, pformatetc->tymed);
 344
 345         if(!(DVASPECT_CONTENT & pformatetc->dwAspect))
 346           return DV_E_DVASPECT;
 347
 348         /* check our formats table what we have */
 349         for (i=0; i<MAX_FORMATS; i++)
 350         {
 351           if ((This->pFormatEtc[i].cfFormat == pformatetc->cfFormat)
 352            && (This->pFormatEtc[i].tymed == pformatetc->tymed))
 353           {
 354             return S_OK;
 355           }
 356         }
 357
 358         return DV_E_TYMED;
 359 }
 360
 361 static HRESULT WINAPI IDataObject_fnGetCanonicalFormatEtc(LPDATAOBJECT iface, LPFORMATETC pformatectIn, LPFORMATETC pformatetcOut)
 362 {
 363         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 364         FIXME("(%p)->()\n", This);
 365         return E_NOTIMPL;
 366 }
 367
 368 static HRESULT WINAPI IDataObject_fnSetData(LPDATAOBJECT iface, LPFORMATETC pformatetc, STGMEDIUM *pmedium, BOOL fRelease)
 369 {
 370         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 371         FIXME("(%p)->()\n", This);
 372         return E_NOTIMPL;
 373 }
 374
 375 static HRESULT WINAPI IDataObject_fnEnumFormatEtc(LPDATAOBJECT iface, DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc)
 376 {
 377         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 378
 379         TRACE("(%p)->()\n", This);
 380         *ppenumFormatEtc=NULL;
 381
 382         /* only get data */
 383         if (DATADIR_GET == dwDirection)
 384         {
 385           *ppenumFormatEtc = IEnumFORMATETC_Constructor(MAX_FORMATS, This->pFormatEtc);
 386           return (*ppenumFormatEtc) ? S_OK : E_FAIL;
 387         }
 388
 389         return E_NOTIMPL;
 390 }
 391
 392 static HRESULT WINAPI IDataObject_fnDAdvise(LPDATAOBJECT iface, FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, DWORD *pdwConnection)
 393 {
 394         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 395         FIXME("(%p)->()\n", This);
 396         return E_NOTIMPL;
 397 }
 398 static HRESULT WINAPI IDataObject_fnDUnadvise(LPDATAOBJECT iface, DWORD dwConnection)
 399 {
 400         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 401         FIXME("(%p)->()\n", This);
 402         return E_NOTIMPL;
 403 }
 404 static HRESULT WINAPI IDataObject_fnEnumDAdvise(LPDATAOBJECT iface, IEnumSTATDATA **ppenumAdvise)
 405 {
 406         IDataObjectImpl *This = (IDataObjectImpl *)iface;
 407         FIXME("(%p)->()\n", This);
 408         return E_NOTIMPL;
 409 }
 410
 411 static struct IDataObjectVtbl dtovt =
 412 {
 413         IDataObject_fnQueryInterface,
 414         IDataObject_fnAddRef,
 415         IDataObject_fnRelease,
 416         IDataObject_fnGetData,
 417         IDataObject_fnGetDataHere,
 418         IDataObject_fnQueryGetData,
 419         IDataObject_fnGetCanonicalFormatEtc,
 420         IDataObject_fnSetData,
 421         IDataObject_fnEnumFormatEtc,
 422         IDataObject_fnDAdvise,
 423         IDataObject_fnDUnadvise,
 424         IDataObject_fnEnumDAdvise
 425 };
 426
 427 /**************************************************************************
 428 *  IDataObject_Constructor
 429 */
 430 LPDATAOBJECT IDataObject_Constructor(HWND hwndOwner,
 431                LPCITEMIDLIST pMyPidl, LPCITEMIDLIST * apidl, UINT cidl)
 432 {
 433     IDataObjectImpl* dto;
 434
 435     dto = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDataObjectImpl));
 436
 437     if (dto)
 438     {
 439         dto->ref = 1;
 440         dto->lpVtbl = &dtovt;
 441         dto->pidl = ILClone(pMyPidl);
 442         dto->apidl = _ILCopyaPidl(apidl, cidl);
 443         dto->cidl = cidl;
 444
 445         dto->cfShellIDList = RegisterClipboardFormatA(CFSTR_SHELLIDLIST);
 446         dto->cfFileNameA = RegisterClipboardFormatA(CFSTR_FILENAMEA);
 447         dto->cfFileNameW = RegisterClipboardFormatA(CFSTR_FILENAMEW);
 448         InitFormatEtc(dto->pFormatEtc[0], dto->cfShellIDList, TYMED_HGLOBAL);
 449         InitFormatEtc(dto->pFormatEtc[1], CF_HDROP, TYMED_HGLOBAL);
 450         InitFormatEtc(dto->pFormatEtc[2], dto->cfFileNameA, TYMED_HGLOBAL);
 451         InitFormatEtc(dto->pFormatEtc[3], dto->cfFileNameW, TYMED_HGLOBAL);
 452     }
 453
 454     TRACE("(%p)->(apidl=%p cidl=%u)\n",dto, apidl, cidl);
 455     return (LPDATAOBJECT)dto;
 456 }