dlls/shell32/shfldr_desktop.c

   1
   2 /*
   3  *    Virtual Desktop Folder
   4  *
   5  *    Copyright 1997            Marcus Meissner
   6  *    Copyright 1998, 1999, 2002    Juergen Schmied
   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
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30
  31 #define COBJMACROS
  32 #define NONAMELESSUNION
  33 #define NONAMELESSSTRUCT
  34
  35 #include "winerror.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winreg.h"
  39 #include "wingdi.h"
  40 #include "winuser.h"
  41
  42 #include "ole2.h"
  43 #include "shlguid.h"
  44
  45 #include "enumidlist.h"
  46 #include "pidl.h"
  47 #include "undocshell.h"
  48 #include "shell32_main.h"
  49 #include "shresdef.h"
  50 #include "shlwapi.h"
  51 #include "shellfolder.h"
  52 #include "wine/debug.h"
  53 #include "debughlp.h"
  54 #include "shfldr.h"
  55
  56 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  57
  58 /* Undocumented functions from shdocvw */
  59 extern HRESULT WINAPI IEParseDisplayNameWithBCW(DWORD codepage, LPCWSTR lpszDisplayName, LPBC pbc, LPITEMIDLIST *ppidl);
  60
  61
  62 /***********************************************************************
  63 *     Desktopfolder implementation
  64 */
  65
  66 typedef struct {
  67     const IShellFolder2Vtbl *lpVtbl;
  68     LONG ref;
  69
  70     /* both paths are parsible from the desktop */
  71     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  72     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  73
  74     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  75     BOOL fAcceptFmt;        /* flag for pending Drop */
  76 } IGenericSFImpl;
  77
  78 #define _IUnknown_(This)    (IShellFolder*)&(This->lpVtbl)
  79 #define _IShellFolder_(This)    (IShellFolder*)&(This->lpVtbl)
  80
  81 static const shvheader DesktopSFHeader[] = {
  82     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  83     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  84     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  85     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  86     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  87 };
  88
  89 #define DESKTOPSHELLVIEWCOLUMNS 5
  90
  91 /**************************************************************************
  92  *    ISF_Desktop_fnQueryInterface
  93  *
  94  * NOTES supports not IPersist/IPersistFolder
  95  */
  96 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
  97                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
  98 {
  99     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 100
 101     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 102
 103     *ppvObj = NULL;
 104
 105     if (IsEqualIID (riid, &IID_IUnknown) ||
 106         IsEqualIID (riid, &IID_IShellFolder) ||
 107         IsEqualIID (riid, &IID_IShellFolder2))
 108     {
 109         *ppvObj = This;
 110     }
 111
 112     if (*ppvObj)
 113     {
 114         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 115         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 116         return S_OK;
 117     }
 118     TRACE ("-- Interface: E_NOINTERFACE\n");
 119     return E_NOINTERFACE;
 120 }
 121
 122 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 123 {
 124     return 2; /* non-heap based object */
 125 }
 126
 127 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 128 {
 129     return 1; /* non-heap based object */
 130 }
 131
 132 /**************************************************************************
 133  *    ISF_Desktop_fnParseDisplayName
 134  *
 135  * NOTES
 136  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 137  *    to MyComputer
 138  */
 139 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 140                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 141                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 142 {
 143     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 144     WCHAR szElement[MAX_PATH];
 145     LPCWSTR szNext = NULL;
 146     LPITEMIDLIST pidlTemp = NULL;
 147     HRESULT hr = S_OK;
 148     CLSID clsid;
 149
 150     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 151            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 152            pchEaten, ppidl, pdwAttributes);
 153
 154     if (!lpszDisplayName || !ppidl)
 155         return E_INVALIDARG;
 156
 157     *ppidl = 0;
 158
 159     if (pchEaten)
 160         *pchEaten = 0;        /* strange but like the original */
 161
 162     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 163     {
 164         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 165         TRACE ("-- element: %s\n", debugstr_w (szElement));
 166         SHCLSIDFromStringW (szElement + 2, &clsid);
 167         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 168     }
 169     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 170     {
 171         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 172         if (UNIXFS_is_rooted_at_desktop())
 173             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 174         else
 175             pidlTemp = _ILCreateMyComputer ();
 176         szNext = lpszDisplayName;
 177     }
 178     else if (PathIsUNCW(lpszDisplayName))
 179     {
 180         pidlTemp = _ILCreateNetwork();
 181         szNext = lpszDisplayName;
 182     }
 183     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 184     {
 185         *ppidl = pidlTemp;
 186         return S_OK;
 187     }
 188     else if (strchrW(lpszDisplayName,':'))
 189     {
 190         return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 191     }
 192     else
 193     {
 194         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 195
 196         if (*lpszDisplayName)
 197         {
 198             WCHAR szPath[MAX_PATH];
 199             LPWSTR pathPtr;
 200
 201             /* build a complete path to create a simple pidl */
 202             lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 203             pathPtr = PathAddBackslashW(szPath);
 204             if (pathPtr)
 205             {
 206                 lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 207                 hr = _ILCreateFromPathW(szPath, &pidlTemp);
 208             }
 209             else
 210             {
 211                 /* should never reach here, but for completeness */
 212                 hr = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
 213             }
 214         }
 215         else
 216             pidlTemp = _ILCreateMyComputer();
 217
 218         szNext = NULL;
 219     }
 220
 221     if (SUCCEEDED(hr) && pidlTemp)
 222     {
 223         if (szNext && *szNext)
 224         {
 225             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 226                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 227         }
 228         else
 229         {
 230             if (pdwAttributes && *pdwAttributes)
 231                 hr = SHELL32_GetItemAttributes(_IShellFolder_ (This),
 232                                                pidlTemp, pdwAttributes);
 233         }
 234     }
 235
 236     *ppidl = pidlTemp;
 237
 238     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 239
 240     return hr;
 241 }
 242
 243 /**************************************************************************
 244  *  CreateDesktopEnumList()
 245  */
 246 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 247  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 248  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 249  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 250  'a','c','e','\0' };
 251
 252 static BOOL CreateDesktopEnumList(IEnumIDList *list, DWORD dwFlags)
 253 {
 254     BOOL ret = TRUE;
 255     WCHAR szPath[MAX_PATH];
 256
 257     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 258
 259     /* enumerate the root folders */
 260     if (dwFlags & SHCONTF_FOLDERS)
 261     {
 262         HKEY hkey;
 263         UINT i;
 264
 265         /* create the pidl for This item */
 266         ret = AddToEnumList(list, _ILCreateMyComputer());
 267
 268         for (i=0; i<2; i++) {
 269             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 270                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 271             {
 272                 WCHAR iid[50];
 273                 int i=0;
 274
 275                 while (ret)
 276                 {
 277                     DWORD size;
 278                     LONG r;
 279
 280                     size = sizeof (iid) / sizeof (iid[0]);
 281                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 282                     if (ERROR_SUCCESS == r)
 283                     {
 284                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 285                         i++;
 286                     }
 287                     else if (ERROR_NO_MORE_ITEMS == r)
 288                         break;
 289                     else
 290                         ret = FALSE;
 291                 }
 292                 RegCloseKey(hkey);
 293             }
 294         }
 295     }
 296
 297     /* enumerate the elements in %windir%\desktop */
 298     SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 299     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 300
 301     return ret;
 302 }
 303
 304 /**************************************************************************
 305  *        ISF_Desktop_fnEnumObjects
 306  */
 307 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 308                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 309 {
 310     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 311
 312     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 313            This, hwndOwner, dwFlags, ppEnumIDList);
 314
 315     *ppEnumIDList = IEnumIDList_Constructor();
 316     if (*ppEnumIDList)
 317         CreateDesktopEnumList(*ppEnumIDList, dwFlags);
 318
 319     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 320
 321     return *ppEnumIDList ? S_OK : E_OUTOFMEMORY;
 322 }
 323
 324 /**************************************************************************
 325  *        ISF_Desktop_fnBindToObject
 326  */
 327 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 328                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 329 {
 330     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 331
 332     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 333            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 334
 335     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 336 }
 337
 338 /**************************************************************************
 339  *    ISF_Desktop_fnBindToStorage
 340  */
 341 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 342                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 343 {
 344     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 345
 346     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 347            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 348
 349     *ppvOut = NULL;
 350     return E_NOTIMPL;
 351 }
 352
 353 /**************************************************************************
 354  *     ISF_Desktop_fnCompareIDs
 355  */
 356 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 * iface,
 357                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 358 {
 359     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 360     int nReturn;
 361
 362     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 363     nReturn = SHELL32_CompareIDs (_IShellFolder_ (This), lParam, pidl1, pidl2);
 364     TRACE ("-- %i\n", nReturn);
 365     return nReturn;
 366 }
 367
 368 /**************************************************************************
 369  *    ISF_Desktop_fnCreateViewObject
 370  */
 371 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 372                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 373 {
 374     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 375     LPSHELLVIEW pShellView;
 376     HRESULT hr = E_INVALIDARG;
 377
 378     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 379            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 380
 381     if (!ppvOut)
 382         return hr;
 383
 384     *ppvOut = NULL;
 385
 386     if (IsEqualIID (riid, &IID_IDropTarget))
 387     {
 388         WARN ("IDropTarget not implemented\n");
 389         hr = E_NOTIMPL;
 390     }
 391     else if (IsEqualIID (riid, &IID_IContextMenu))
 392     {
 393         WARN ("IContextMenu not implemented\n");
 394         hr = E_NOTIMPL;
 395     }
 396     else if (IsEqualIID (riid, &IID_IShellView))
 397     {
 398         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 399         if (pShellView)
 400         {
 401             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 402             IShellView_Release (pShellView);
 403         }
 404     }
 405     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 406     return hr;
 407 }
 408
 409 /**************************************************************************
 410  *  ISF_Desktop_fnGetAttributesOf
 411  */
 412 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 413                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 414 {
 415     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 416     HRESULT hr = S_OK;
 417     static const DWORD dwDesktopAttributes =
 418         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 419         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 420     static const DWORD dwMyComputerAttributes =
 421         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 422         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 423
 424     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 425            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 426
 427     if (!rgfInOut)
 428         return E_INVALIDARG;
 429     if (cidl && !apidl)
 430         return E_INVALIDARG;
 431
 432     if (*rgfInOut == 0)
 433         *rgfInOut = ~0;
 434
 435     if(cidl == 0) {
 436         *rgfInOut &= dwDesktopAttributes;
 437     } else {
 438         while (cidl > 0 && *apidl) {
 439             pdump (*apidl);
 440             if (_ILIsDesktop(*apidl)) {
 441                 *rgfInOut &= dwDesktopAttributes;
 442             } else if (_ILIsMyComputer(*apidl)) {
 443                 *rgfInOut &= dwMyComputerAttributes;
 444             } else {
 445                 SHELL32_GetItemAttributes (_IShellFolder_ (This), *apidl, rgfInOut);
 446             }
 447             apidl++;
 448             cidl--;
 449         }
 450     }
 451     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 452     *rgfInOut &= ~SFGAO_VALIDATE;
 453
 454     TRACE ("-- result=0x%08x\n", *rgfInOut);
 455
 456     return hr;
 457 }
 458
 459 /**************************************************************************
 460  *    ISF_Desktop_fnGetUIObjectOf
 461  *
 462  * PARAMETERS
 463  *  HWND           hwndOwner, //[in ] Parent window for any output
 464  *  UINT           cidl,      //[in ] array size
 465  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 466  *  REFIID         riid,      //[in ] Requested Interface
 467  *  UINT*          prgfInOut, //[   ] reserved
 468  *  LPVOID*        ppvObject) //[out] Resulting Interface
 469  *
 470  */
 471 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 472                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 473                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 474 {
 475     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 476
 477     LPITEMIDLIST pidl;
 478     IUnknown *pObj = NULL;
 479     HRESULT hr = E_INVALIDARG;
 480
 481     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 482        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 483
 484     if (!ppvOut)
 485         return hr;
 486
 487     *ppvOut = NULL;
 488
 489     if (IsEqualIID (riid, &IID_IContextMenu))
 490     {
 491         if (cidl > 0)
 492             pObj = (LPUNKNOWN) ISvItemCm_Constructor( (IShellFolder *) iface, This->pidlRoot, apidl, cidl);
 493         else
 494             pObj = (LPUNKNOWN) ISvBgCm_Constructor( (IShellFolder *) iface, TRUE);
 495         hr = S_OK;
 496     }
 497     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 498     {
 499         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 500                                                   This->pidlRoot, apidl, cidl);
 501         hr = S_OK;
 502     }
 503     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 504     {
 505         pidl = ILCombine (This->pidlRoot, apidl[0]);
 506         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 507         SHFree (pidl);
 508         hr = S_OK;
 509     }
 510     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 511     {
 512         pidl = ILCombine (This->pidlRoot, apidl[0]);
 513         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 514         SHFree (pidl);
 515         hr = S_OK;
 516     }
 517     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 518     {
 519         hr = IShellFolder_QueryInterface (iface,
 520                                           &IID_IDropTarget, (LPVOID *) & pObj);
 521     }
 522     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 523               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 524     {
 525         pidl = ILCombine (This->pidlRoot, apidl[0]);
 526         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, (LPVOID*)&pObj);
 527         SHFree (pidl);
 528     }
 529     else
 530         hr = E_NOINTERFACE;
 531
 532     if (SUCCEEDED(hr) && !pObj)
 533         hr = E_OUTOFMEMORY;
 534
 535     *ppvOut = pObj;
 536     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 537     return hr;
 538 }
 539
 540 /**************************************************************************
 541  *    ISF_Desktop_fnGetDisplayNameOf
 542  *
 543  * NOTES
 544  *    special case: pidl = null gives desktop-name back
 545  */
 546 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 547                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 548 {
 549     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 550     HRESULT hr = S_OK;
 551     LPWSTR pszPath;
 552
 553     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 554     pdump (pidl);
 555
 556     if (!strRet)
 557         return E_INVALIDARG;
 558
 559     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 560     if (!pszPath)
 561         return E_OUTOFMEMORY;
 562
 563     if (_ILIsDesktop (pidl))
 564     {
 565         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 566             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 567             strcpyW(pszPath, This->sPathTarget);
 568         else
 569             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 570     }
 571     else if (_ILIsPidlSimple (pidl))
 572     {
 573         GUID const *clsid;
 574
 575         if ((clsid = _ILGetGUIDPointer (pidl)))
 576         {
 577             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 578             {
 579                 int bWantsForParsing;
 580
 581                 /*
 582                  * We can only get a filesystem path from a shellfolder if the
 583                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 584                  *
 585                  * Exception: The MyComputer folder doesn't have this key,
 586                  *   but any other filesystem backed folder it needs it.
 587                  */
 588                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 589                 {
 590                     bWantsForParsing = TRUE;
 591                 }
 592                 else
 593                 {
 594                     /* get the "WantsFORPARSING" flag from the registry */
 595                     static const WCHAR clsidW[] =
 596                      { 'C','L','S','I','D','\\',0 };
 597                     static const WCHAR shellfolderW[] =
 598                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 599                     static const WCHAR wantsForParsingW[] =
 600                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 601                      'g',0 };
 602                     WCHAR szRegPath[100];
 603                     LONG r;
 604
 605                     lstrcpyW (szRegPath, clsidW);
 606                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 607                     lstrcatW (szRegPath, shellfolderW);
 608                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 609                                     wantsForParsingW, NULL, NULL, NULL);
 610                     if (r == ERROR_SUCCESS)
 611                         bWantsForParsing = TRUE;
 612                     else
 613                         bWantsForParsing = FALSE;
 614                 }
 615
 616                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 617                      bWantsForParsing)
 618                 {
 619                     /*
 620                      * we need the filesystem path to the destination folder.
 621                      * Only the folder itself can know it
 622                      */
 623                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 624                                                         pszPath,
 625                                                         MAX_PATH);
 626                 }
 627                 else
 628                 {
 629                     /* parsing name like ::{...} */
 630                     pszPath[0] = ':';
 631                     pszPath[1] = ':';
 632                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 633                 }
 634             }
 635             else
 636             {
 637                 /* user friendly name */
 638                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 639             }
 640         }
 641         else
 642         {
 643             int cLen = 0;
 644
 645             /* file system folder or file rooted at the desktop */
 646             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 647                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 648             {
 649                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 650                 PathAddBackslashW(pszPath);
 651                 cLen = lstrlenW(pszPath);
 652             }
 653
 654             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 655
 656             if (!_ILIsFolder(pidl))
 657                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 658         }
 659     }
 660     else
 661     {
 662         /* a complex pidl, let the subfolder do the work */
 663         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 664                                             pszPath, MAX_PATH);
 665     }
 666
 667     if (SUCCEEDED(hr))
 668     {
 669         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 670         if (GetVersion() & 0x80000000)
 671         {
 672             strRet->uType = STRRET_CSTR;
 673             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 674                                      NULL, NULL))
 675                 strRet->u.cStr[0] = '\0';
 676             CoTaskMemFree(pszPath);
 677         }
 678         else
 679         {
 680             strRet->uType = STRRET_WSTR;
 681             strRet->u.pOleStr = pszPath;
 682         }
 683     }
 684     else
 685         CoTaskMemFree(pszPath);
 686
 687     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 688      strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 689      debugstr_w(strRet->u.pOleStr), hr);
 690     return hr;
 691 }
 692
 693 /**************************************************************************
 694  *  ISF_Desktop_fnSetNameOf
 695  *  Changes the name of a file object or subfolder, possibly changing its item
 696  *  identifier in the process.
 697  *
 698  * PARAMETERS
 699  *  HWND          hwndOwner,  //[in ] Owner window for output
 700  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 701  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 702  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 703  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 704  */
 705 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 706                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 707                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 708 {
 709     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 710
 711     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p)\n", This, hwndOwner, pidl,
 712            debugstr_w (lpName), dwFlags, pPidlOut);
 713
 714     return E_FAIL;
 715 }
 716
 717 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 718                 GUID * pguid)
 719 {
 720     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 721
 722     FIXME ("(%p)\n", This);
 723     return E_NOTIMPL;
 724 }
 725
 726 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 727                 IEnumExtraSearch ** ppenum)
 728 {
 729     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 730     FIXME ("(%p)\n", This);
 731     return E_NOTIMPL;
 732 }
 733
 734 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 735                 DWORD dwRes, ULONG * pSort, ULONG * pDisplay)
 736 {
 737     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 738
 739     TRACE ("(%p)\n", This);
 740
 741     if (pSort)
 742         *pSort = 0;
 743     if (pDisplay)
 744         *pDisplay = 0;
 745
 746     return S_OK;
 747 }
 748 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 749                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 750 {
 751     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 752
 753     TRACE ("(%p)\n", This);
 754
 755     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 756     return E_INVALIDARG;
 757
 758     *pcsFlags = DesktopSFHeader[iColumn].pcsFlags;
 759
 760     return S_OK;
 761 }
 762
 763 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 764                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 765 {
 766     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 767     FIXME ("(%p)\n", This);
 768
 769     return E_NOTIMPL;
 770 }
 771
 772 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 773                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 774 {
 775     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 776
 777     HRESULT hr = S_OK;
 778
 779     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 780
 781     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 782         return E_INVALIDARG;
 783
 784     if (!pidl)
 785     {
 786         psd->fmt = DesktopSFHeader[iColumn].fmt;
 787         psd->cxChar = DesktopSFHeader[iColumn].cxChar;
 788         psd->str.uType = STRRET_CSTR;
 789         LoadStringA (shell32_hInstance, DesktopSFHeader[iColumn].colnameid,
 790                      psd->str.u.cStr, MAX_PATH);
 791         return S_OK;
 792     }
 793
 794     /* the data from the pidl */
 795     psd->str.uType = STRRET_CSTR;
 796     switch (iColumn)
 797     {
 798     case 0:        /* name */
 799         hr = IShellFolder_GetDisplayNameOf(iface, pidl,
 800                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 801         break;
 802     case 1:        /* size */
 803         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 804         break;
 805     case 2:        /* type */
 806         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 807         break;
 808     case 3:        /* date */
 809         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 810         break;
 811     case 4:        /* attributes */
 812         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 813         break;
 814     }
 815
 816     return hr;
 817 }
 818
 819 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 820                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 821 {
 822     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 823     FIXME ("(%p)\n", This);
 824     return E_NOTIMPL;
 825 }
 826
 827 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 828 {
 829     ISF_Desktop_fnQueryInterface,
 830     ISF_Desktop_fnAddRef,
 831     ISF_Desktop_fnRelease,
 832     ISF_Desktop_fnParseDisplayName,
 833     ISF_Desktop_fnEnumObjects,
 834     ISF_Desktop_fnBindToObject,
 835     ISF_Desktop_fnBindToStorage,
 836     ISF_Desktop_fnCompareIDs,
 837     ISF_Desktop_fnCreateViewObject,
 838     ISF_Desktop_fnGetAttributesOf,
 839     ISF_Desktop_fnGetUIObjectOf,
 840     ISF_Desktop_fnGetDisplayNameOf,
 841     ISF_Desktop_fnSetNameOf,
 842     /* ShellFolder2 */
 843     ISF_Desktop_fnGetDefaultSearchGUID,
 844     ISF_Desktop_fnEnumSearches,
 845     ISF_Desktop_fnGetDefaultColumn,
 846     ISF_Desktop_fnGetDefaultColumnState,
 847     ISF_Desktop_fnGetDetailsEx,
 848     ISF_Desktop_fnGetDetailsOf,
 849     ISF_Desktop_fnMapColumnToSCID
 850 };
 851
 852 /**************************************************************************
 853  *    ISF_Desktop_Constructor
 854  */
 855 HRESULT WINAPI ISF_Desktop_Constructor (
 856                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 857 {
 858     static IGenericSFImpl *cached_sf;
 859     WCHAR szMyPath[MAX_PATH];
 860
 861     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 862
 863     if (!ppv)
 864         return E_POINTER;
 865     if (pUnkOuter)
 866         return CLASS_E_NOAGGREGATION;
 867
 868     if (!cached_sf)
 869     {
 870         IGenericSFImpl *sf;
 871
 872         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 873             return E_UNEXPECTED;
 874
 875         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IGenericSFImpl) );
 876         if (!sf)
 877             return E_OUTOFMEMORY;
 878
 879         sf->ref = 1;
 880         sf->lpVtbl = &vt_MCFldr_ShellFolder2;
 881         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 882         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 883         lstrcpyW( sf->sPathTarget, szMyPath );
 884
 885         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 886         {
 887             /* some other thread already been here */
 888             SHFree( sf->pidlRoot );
 889             SHFree( sf->sPathTarget );
 890             LocalFree( sf );
 891         }
 892     }
 893
 894     return IUnknown_QueryInterface( _IUnknown_(cached_sf), riid, ppv );
 895 }