reactos/dll/win32/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 /***********************************************************************
  59 *     Desktopfolder implementation
  60 */
  61
  62 typedef struct {
  63     const IShellFolder2Vtbl *lpVtbl;
  64     const IPersistFolder2Vtbl *lpPF2;
  65     LONG ref;
  66
  67     /* both paths are parsible from the desktop */
  68     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  69     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  70
  71     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  72     BOOL fAcceptFmt;        /* flag for pending Drop */
  73 } IGenericSFImpl;
  74
  75 #define _IUnknown_(This)    (IShellFolder*)&(This->lpVtbl)
  76 #define _IShellFolder_(This)    (IShellFolder*)&(This->lpVtbl)
  77
  78 static const shvheader DesktopSFHeader[] = {
  79     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  80     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  81     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  82     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  83     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  84 };
  85
  86 #define DESKTOPSHELLVIEWCOLUMNS 5
  87
  88 /**************************************************************************
  89  *    ISF_Desktop_fnQueryInterface
  90  *
  91  * NOTES supports not IPersist/IPersistFolder
  92  */
  93 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
  94                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
  95 {
  96     IGenericSFImpl *This = (IGenericSFImpl *)iface;
  97
  98     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
  99
 100     *ppvObj = NULL;
 101
 102     if (IsEqualIID (riid, &IID_IUnknown) ||
 103         IsEqualIID (riid, &IID_IShellFolder) ||
 104         IsEqualIID (riid, &IID_IShellFolder2))
 105     {
 106         *ppvObj = This;
 107     }
 108     else if (IsEqualIID (riid, &IID_IPersistFolder) ||
 109              IsEqualIID (riid, &IID_IPersistFolder2))
 110     {
 111         *ppvObj = &This->lpPF2;
 112     }
 113     if (*ppvObj)
 114     {
 115         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 116         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 117         return S_OK;
 118     }
 119     TRACE ("-- Interface: E_NOINTERFACE\n");
 120     return E_NOINTERFACE;
 121 }
 122
 123 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 124 {
 125     return 2; /* non-heap based object */
 126 }
 127
 128 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 129 {
 130     return 1; /* non-heap based object */
 131 }
 132
 133 /**************************************************************************
 134  *    ISF_Desktop_fnParseDisplayName
 135  *
 136  * NOTES
 137  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 138  *    to MyComputer
 139  */
 140 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 141                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 142                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 143 {
 144     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 145     WCHAR szElement[MAX_PATH];
 146     LPCWSTR szNext = NULL;
 147     LPITEMIDLIST pidlTemp = NULL;
 148     HRESULT hr = S_OK;
 149     CLSID clsid;
 150
 151     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 152            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 153            pchEaten, ppidl, pdwAttributes);
 154
 155     if (!lpszDisplayName || !ppidl)
 156         return E_INVALIDARG;
 157
 158     *ppidl = 0;
 159
 160     if (pchEaten)
 161         *pchEaten = 0;        /* strange but like the original */
 162
 163     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 164     {
 165         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 166         TRACE ("-- element: %s\n", debugstr_w (szElement));
 167         SHCLSIDFromStringW (szElement + 2, &clsid);
 168         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 169     }
 170     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 171     {
 172         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 173 #if 0
 174         if (UNIXFS_is_rooted_at_desktop())
 175             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 176         else
 177 #endif
 178             pidlTemp = _ILCreateMyComputer ();
 179         szNext = lpszDisplayName;
 180     }
 181     else if (PathIsUNCW(lpszDisplayName))
 182     {
 183         pidlTemp = _ILCreateNetwork();
 184         szNext = lpszDisplayName;
 185     }
 186     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 187     {
 188         *ppidl = pidlTemp;
 189         return S_OK;
 190     }
 191     else
 192     {
 193         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 194
 195         if (*lpszDisplayName)
 196         {
 197             WCHAR szPath[MAX_PATH];
 198             LPWSTR pathPtr;
 199
 200             /* build a complete path to create a simple pidl */
 201             lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 202             pathPtr = PathAddBackslashW(szPath);
 203             if (pathPtr)
 204             {
 205                 lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 206                 hr = _ILCreateFromPathW(szPath, &pidlTemp);
 207             }
 208             else
 209             {
 210                 /* should never reach here, but for completeness */
 211                 hr = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
 212             }
 213         }
 214         else
 215             pidlTemp = _ILCreateMyComputer();
 216
 217         szNext = NULL;
 218     }
 219
 220     if (SUCCEEDED(hr) && pidlTemp)
 221     {
 222         if (szNext && *szNext)
 223         {
 224             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 225                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 226         }
 227         else
 228         {
 229             if (pdwAttributes && *pdwAttributes)
 230                 hr = SHELL32_GetItemAttributes(_IShellFolder_ (This),
 231                                                pidlTemp, pdwAttributes);
 232         }
 233     }
 234
 235     *ppidl = pidlTemp;
 236
 237     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 238
 239     return hr;
 240 }
 241
 242 /**************************************************************************
 243  *  CreateDesktopEnumList()
 244  */
 245 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 246  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 247  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 248  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 249  'a','c','e','\0' };
 250
 251 static BOOL CreateDesktopEnumList(IEnumIDList *list, DWORD dwFlags)
 252 {
 253     BOOL ret = TRUE;
 254     WCHAR szPath[MAX_PATH];
 255
 256     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 257
 258     /* enumerate the root folders */
 259     if (dwFlags & SHCONTF_FOLDERS)
 260     {
 261         HKEY hkey;
 262         UINT i;
 263
 264         /* create the pidl for This item */
 265         ret = AddToEnumList(list, _ILCreateMyComputer());
 266
 267         for (i=0; i<2; i++) {
 268             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 269                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 270             {
 271                 WCHAR iid[50];
 272                 int i=0;
 273
 274                 while (ret)
 275                 {
 276                     DWORD size;
 277                     LONG r;
 278
 279                     size = sizeof (iid);
 280                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 281                     if (ERROR_SUCCESS == r)
 282                     {
 283                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 284                         i++;
 285                     }
 286                     else if (ERROR_NO_MORE_ITEMS == r)
 287                         break;
 288                     else
 289                         ret = FALSE;
 290                 }
 291                 RegCloseKey(hkey);
 292             }
 293         }
 294     }
 295
 296     /* enumerate the elements in %windir%\desktop */
 297     SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 298     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 299
 300     return ret;
 301 }
 302
 303 /**************************************************************************
 304  *        ISF_Desktop_fnEnumObjects
 305  */
 306 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 307                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 308 {
 309     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 310
 311     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 312            This, hwndOwner, dwFlags, ppEnumIDList);
 313
 314     *ppEnumIDList = IEnumIDList_Constructor();
 315     if (*ppEnumIDList)
 316         CreateDesktopEnumList(*ppEnumIDList, dwFlags);
 317
 318     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 319
 320     return *ppEnumIDList ? S_OK : E_OUTOFMEMORY;
 321 }
 322
 323 /**************************************************************************
 324  *        ISF_Desktop_fnBindToObject
 325  */
 326 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 327                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 328 {
 329     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 330
 331     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 332            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 333
 334     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 335 }
 336
 337 /**************************************************************************
 338  *    ISF_Desktop_fnBindToStorage
 339  */
 340 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 341                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 342 {
 343     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 344
 345     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 346            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 347
 348     *ppvOut = NULL;
 349     return E_NOTIMPL;
 350 }
 351
 352 /**************************************************************************
 353  *     ISF_Desktop_fnCompareIDs
 354  */
 355 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 * iface,
 356                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 357 {
 358     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 359     int nReturn;
 360
 361     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 362     nReturn = SHELL32_CompareIDs (_IShellFolder_ (This), lParam, pidl1, pidl2);
 363     TRACE ("-- %i\n", nReturn);
 364     return nReturn;
 365 }
 366
 367 /**************************************************************************
 368  *    ISF_Desktop_fnCreateViewObject
 369  */
 370 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 371                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 372 {
 373     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 374     LPSHELLVIEW pShellView;
 375     HRESULT hr = E_INVALIDARG;
 376
 377     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 378            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 379
 380     if (!ppvOut)
 381         return hr;
 382
 383     *ppvOut = NULL;
 384
 385     if (IsEqualIID (riid, &IID_IDropTarget))
 386     {
 387         WARN ("IDropTarget not implemented\n");
 388         hr = E_NOTIMPL;
 389     }
 390     else if (IsEqualIID (riid, &IID_IContextMenu))
 391     {
 392         WARN ("IContextMenu not implemented\n");
 393         hr = E_NOTIMPL;
 394     }
 395     else if (IsEqualIID (riid, &IID_IShellView))
 396     {
 397         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 398         if (pShellView)
 399         {
 400             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 401             IShellView_Release (pShellView);
 402         }
 403     }
 404     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 405     return hr;
 406 }
 407
 408 /**************************************************************************
 409  *  ISF_Desktop_fnGetAttributesOf
 410  */
 411 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 412                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 413 {
 414     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 415     HRESULT hr = S_OK;
 416     static const DWORD dwDesktopAttributes =
 417         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 418         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 419     static const DWORD dwMyComputerAttributes =
 420         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 421         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 422
 423     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 424            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 425
 426     if (!rgfInOut)
 427         return E_INVALIDARG;
 428     if (cidl && !apidl)
 429         return E_INVALIDARG;
 430
 431     if (*rgfInOut == 0)
 432         *rgfInOut = ~0;
 433
 434     if(cidl == 0) {
 435         *rgfInOut &= dwDesktopAttributes;
 436     } else {
 437         while (cidl > 0 && *apidl) {
 438             pdump (*apidl);
 439             if (_ILIsDesktop(*apidl)) {
 440                 *rgfInOut &= dwDesktopAttributes;
 441             } else if (_ILIsMyComputer(*apidl)) {
 442                 *rgfInOut &= dwMyComputerAttributes;
 443             } else {
 444                 SHELL32_GetItemAttributes (_IShellFolder_ (This), *apidl, rgfInOut);
 445             }
 446             apidl++;
 447             cidl--;
 448         }
 449     }
 450     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 451     *rgfInOut &= ~SFGAO_VALIDATE;
 452
 453     TRACE ("-- result=0x%08x\n", *rgfInOut);
 454
 455     return hr;
 456 }
 457
 458 /**************************************************************************
 459  *    ISF_Desktop_fnGetUIObjectOf
 460  *
 461  * PARAMETERS
 462  *  HWND           hwndOwner, //[in ] Parent window for any output
 463  *  UINT           cidl,      //[in ] array size
 464  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 465  *  REFIID         riid,      //[in ] Requested Interface
 466  *  UINT*          prgfInOut, //[   ] reserved
 467  *  LPVOID*        ppvObject) //[out] Resulting Interface
 468  *
 469  */
 470 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 471                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 472                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 473 {
 474     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 475
 476     LPITEMIDLIST pidl;
 477     IUnknown *pObj = NULL;
 478     HRESULT hr = E_INVALIDARG;
 479
 480     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 481        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 482
 483     if (!ppvOut)
 484         return hr;
 485
 486     *ppvOut = NULL;
 487
 488     if (IsEqualIID (riid, &IID_IContextMenu))
 489     {
 490         if (cidl > 0)
 491             pObj = (LPUNKNOWN) ISvItemCm_Constructor( (IShellFolder *) iface, This->pidlRoot, apidl, cidl);
 492         else
 493             pObj = (LPUNKNOWN) ISvBgCm_Constructor( (IShellFolder *) iface, TRUE);
 494         hr = S_OK;
 495     }
 496     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 497     {
 498         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 499                                                   This->pidlRoot, apidl, cidl);
 500         hr = S_OK;
 501     }
 502     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 503     {
 504         pidl = ILCombine (This->pidlRoot, apidl[0]);
 505         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 506         SHFree (pidl);
 507         hr = S_OK;
 508     }
 509     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 510     {
 511         pidl = ILCombine (This->pidlRoot, apidl[0]);
 512         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 513         SHFree (pidl);
 514         hr = S_OK;
 515     }
 516     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 517     {
 518         hr = IShellFolder_QueryInterface (iface,
 519                                           &IID_IDropTarget, (LPVOID *) & pObj);
 520     }
 521     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 522               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 523     {
 524         pidl = ILCombine (This->pidlRoot, apidl[0]);
 525         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, (LPVOID*)&pObj);
 526         SHFree (pidl);
 527     }
 528     else
 529         hr = E_NOINTERFACE;
 530
 531     if (SUCCEEDED(hr) && !pObj)
 532         hr = E_OUTOFMEMORY;
 533
 534     *ppvOut = pObj;
 535     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 536     return hr;
 537 }
 538
 539 /**************************************************************************
 540  *    ISF_Desktop_fnGetDisplayNameOf
 541  *
 542  * NOTES
 543  *    special case: pidl = null gives desktop-name back
 544  */
 545 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 546                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 547 {
 548     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 549     HRESULT hr = S_OK;
 550     LPWSTR pszPath;
 551
 552     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 553     pdump (pidl);
 554
 555     if (!strRet)
 556         return E_INVALIDARG;
 557
 558     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 559     if (!pszPath)
 560         return E_OUTOFMEMORY;
 561
 562     if (_ILIsDesktop (pidl))
 563     {
 564         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 565             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 566             strcpyW(pszPath, This->sPathTarget);
 567         else
 568             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 569     }
 570     else if (_ILIsPidlSimple (pidl))
 571     {
 572         GUID const *clsid;
 573
 574         if ((clsid = _ILGetGUIDPointer (pidl)))
 575         {
 576             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 577             {
 578                 int bWantsForParsing;
 579
 580                 /*
 581                  * We can only get a filesystem path from a shellfolder if the
 582                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 583                  *
 584                  * Exception: The MyComputer folder doesn't have this key,
 585                  *   but any other filesystem backed folder it needs it.
 586                  */
 587                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 588                 {
 589                     bWantsForParsing = TRUE;
 590                 }
 591                 else
 592                 {
 593                     /* get the "WantsFORPARSING" flag from the registry */
 594                     static const WCHAR clsidW[] =
 595                      { 'C','L','S','I','D','\\',0 };
 596                     static const WCHAR shellfolderW[] =
 597                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 598                     static const WCHAR wantsForParsingW[] =
 599                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 600                      'g',0 };
 601                     WCHAR szRegPath[100];
 602                     LONG r;
 603
 604                     lstrcpyW (szRegPath, clsidW);
 605                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 606                     lstrcatW (szRegPath, shellfolderW);
 607                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 608                                     wantsForParsingW, NULL, NULL, NULL);
 609                     if (r == ERROR_SUCCESS)
 610                         bWantsForParsing = TRUE;
 611                     else
 612                         bWantsForParsing = FALSE;
 613                 }
 614
 615                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 616                      bWantsForParsing)
 617                 {
 618                     /*
 619                      * we need the filesystem path to the destination folder.
 620                      * Only the folder itself can know it
 621                      */
 622                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 623                                                         pszPath,
 624                                                         MAX_PATH);
 625                 }
 626                 else
 627                 {
 628                     /* parsing name like ::{...} */
 629                     pszPath[0] = ':';
 630                     pszPath[1] = ':';
 631                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 632                 }
 633             }
 634             else
 635             {
 636                 /* user friendly name */
 637                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 638             }
 639         }
 640         else
 641         {
 642             int cLen = 0;
 643
 644             /* file system folder or file rooted at the desktop */
 645             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 646                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 647             {
 648                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 649                 PathAddBackslashW(pszPath);
 650                 cLen = lstrlenW(pszPath);
 651             }
 652
 653             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 654
 655             if (!_ILIsFolder(pidl))
 656                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 657         }
 658     }
 659     else
 660     {
 661         /* a complex pidl, let the subfolder do the work */
 662         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 663                                             pszPath, MAX_PATH);
 664     }
 665
 666     if (SUCCEEDED(hr))
 667     {
 668         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 669         if (GetVersion() & 0x80000000)
 670         {
 671             strRet->uType = STRRET_CSTR;
 672             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 673                                      NULL, NULL))
 674                 strRet->u.cStr[0] = '\0';
 675             CoTaskMemFree(pszPath);
 676         }
 677         else
 678         {
 679             strRet->uType = STRRET_WSTR;
 680             strRet->u.pOleStr = pszPath;
 681         }
 682     }
 683     else
 684         CoTaskMemFree(pszPath);
 685
 686     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 687      strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 688      debugstr_w(strRet->u.pOleStr), hr);
 689     return hr;
 690 }
 691
 692 /**************************************************************************
 693  *  ISF_Desktop_fnSetNameOf
 694  *  Changes the name of a file object or subfolder, possibly changing its item
 695  *  identifier in the process.
 696  *
 697  * PARAMETERS
 698  *  HWND          hwndOwner,  //[in ] Owner window for output
 699  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 700  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 701  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 702  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 703  */
 704 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 705                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 706                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 707 {
 708     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 709
 710     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p)\n", This, hwndOwner, pidl,
 711            debugstr_w (lpName), dwFlags, pPidlOut);
 712
 713     return E_FAIL;
 714 }
 715
 716 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 717                 GUID * pguid)
 718 {
 719     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 720
 721     FIXME ("(%p)\n", This);
 722     return E_NOTIMPL;
 723 }
 724
 725 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 726                 IEnumExtraSearch ** ppenum)
 727 {
 728     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 729     FIXME ("(%p)\n", This);
 730     return E_NOTIMPL;
 731 }
 732
 733 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 734                 DWORD dwRes, ULONG * pSort, ULONG * pDisplay)
 735 {
 736     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 737
 738     TRACE ("(%p)\n", This);
 739
 740     if (pSort)
 741         *pSort = 0;
 742     if (pDisplay)
 743         *pDisplay = 0;
 744
 745     return S_OK;
 746 }
 747 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 748                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 749 {
 750     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 751
 752     TRACE ("(%p)\n", This);
 753
 754     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 755     return E_INVALIDARG;
 756
 757     *pcsFlags = DesktopSFHeader[iColumn].pcsFlags;
 758
 759     return S_OK;
 760 }
 761
 762 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 763                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 764 {
 765     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 766     FIXME ("(%p)\n", This);
 767
 768     return E_NOTIMPL;
 769 }
 770
 771 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 772                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 773 {
 774     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 775
 776     HRESULT hr = S_OK;
 777
 778     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 779
 780     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 781         return E_INVALIDARG;
 782
 783     if (!pidl)
 784     {
 785         psd->fmt = DesktopSFHeader[iColumn].fmt;
 786         psd->cxChar = DesktopSFHeader[iColumn].cxChar;
 787         psd->str.uType = STRRET_CSTR;
 788         LoadStringA (shell32_hInstance, DesktopSFHeader[iColumn].colnameid,
 789                      psd->str.u.cStr, MAX_PATH);
 790         return S_OK;
 791     }
 792
 793     /* the data from the pidl */
 794     psd->str.uType = STRRET_CSTR;
 795     switch (iColumn)
 796     {
 797     case 0:        /* name */
 798         hr = IShellFolder_GetDisplayNameOf(iface, pidl,
 799                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 800         break;
 801     case 1:        /* size */
 802         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 803         break;
 804     case 2:        /* type */
 805         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 806         break;
 807     case 3:        /* date */
 808         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 809         break;
 810     case 4:        /* attributes */
 811         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 812         break;
 813     }
 814
 815     return hr;
 816 }
 817
 818 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 819                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 820 {
 821     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 822     FIXME ("(%p)\n", This);
 823     return E_NOTIMPL;
 824 }
 825
 826 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 827 {
 828     ISF_Desktop_fnQueryInterface,
 829     ISF_Desktop_fnAddRef,
 830     ISF_Desktop_fnRelease,
 831     ISF_Desktop_fnParseDisplayName,
 832     ISF_Desktop_fnEnumObjects,
 833     ISF_Desktop_fnBindToObject,
 834     ISF_Desktop_fnBindToStorage,
 835     ISF_Desktop_fnCompareIDs,
 836     ISF_Desktop_fnCreateViewObject,
 837     ISF_Desktop_fnGetAttributesOf,
 838     ISF_Desktop_fnGetUIObjectOf,
 839     ISF_Desktop_fnGetDisplayNameOf,
 840     ISF_Desktop_fnSetNameOf,
 841     /* ShellFolder2 */
 842     ISF_Desktop_fnGetDefaultSearchGUID,
 843     ISF_Desktop_fnEnumSearches,
 844     ISF_Desktop_fnGetDefaultColumn,
 845     ISF_Desktop_fnGetDefaultColumnState,
 846     ISF_Desktop_fnGetDetailsEx,
 847     ISF_Desktop_fnGetDetailsOf,
 848     ISF_Desktop_fnMapColumnToSCID
 849 };
 850
 851 static inline IGenericSFImpl *impl_from_IPersistFolder2( IPersistFolder2 *iface )
 852 {
 853     return (IGenericSFImpl *)((char*)iface - FIELD_OFFSET(IGenericSFImpl, lpPF2));
 854 }
 855
 856 static HRESULT WINAPI
 857 ISF_Desktop_PersistFolder2_fnQueryInterface (IPersistFolder2 * iface, REFIID iid,
 858                                        LPVOID * ppvObj)
 859 {
 860     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 861
 862     TRACE ("(%p)\n", This);
 863
 864     return ISF_Desktop_fnQueryInterface ((IShellFolder2*)This, iid, ppvObj);
 865 }
 866
 867 static ULONG WINAPI
 868 ISF_Desktop_PersistFolder2_fnAddRef (IPersistFolder2 * iface)
 869 {
 870     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 871
 872     TRACE ("(%p)->(count=%u)\n", This, This->ref);
 873
 874     return ISF_Desktop_fnAddRef((IShellFolder2*)This);
 875 }
 876
 877 static ULONG WINAPI
 878 ISF_Desktop_PersistFolder2_fnRelease (IPersistFolder2 * iface)
 879 {
 880     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 881
 882     TRACE ("(%p)->(count=%u)\n", This, This->ref);
 883
 884     return ISF_Desktop_fnRelease ((IShellFolder2*)This);
 885 }
 886
 887 static HRESULT WINAPI
 888 ISF_Desktop_PersistFolder2_fnGetClassID (IPersistFolder2 * iface, CLSID * lpClassId)
 889 {
 890     static GUID const CLSID_Desktop =
 891     { 0x00021400, 0x0000, 0x0000, {0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46} };
 892
 893     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 894
 895     TRACE ("(%p)\n", This);
 896
 897     if (!lpClassId)
 898         return E_POINTER;
 899
 900     memcpy(lpClassId, &CLSID_Desktop, sizeof(GUID));
 901
 902     return S_OK;
 903 }
 904 static HRESULT WINAPI
 905 ISF_Desktop_PersistFolder2_fnInitialize (IPersistFolder2 * iface, LPCITEMIDLIST pidl)
 906 {
 907     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 908
 909     TRACE ("(%p)->(%p)\n", This, pidl);
 910
 911     return E_NOTIMPL;
 912 }
 913
 914 static HRESULT WINAPI
 915 ISF_Desktop_PersistFolder2_fnGetCurFolder (IPersistFolder2 * iface,
 916                                        LPITEMIDLIST * pidl)
 917 {
 918     IGenericSFImpl *This = impl_from_IPersistFolder2(iface);
 919
 920     TRACE ("(%p)->(%p)\n", This, pidl);
 921
 922     if (!pidl) return E_POINTER;
 923     *pidl = ILClone (This->pidlRoot);
 924     return S_OK;
 925 }
 926
 927 static const IPersistFolder2Vtbl vt_FSFldr_PersistFolder2 =
 928 {
 929     ISF_Desktop_PersistFolder2_fnQueryInterface,
 930     ISF_Desktop_PersistFolder2_fnAddRef,
 931     ISF_Desktop_PersistFolder2_fnRelease,
 932     ISF_Desktop_PersistFolder2_fnGetClassID,
 933     ISF_Desktop_PersistFolder2_fnInitialize,
 934     ISF_Desktop_PersistFolder2_fnGetCurFolder,
 935 };
 936
 937
 938 /**************************************************************************
 939  *    ISF_Desktop_Constructor
 940  */
 941 HRESULT WINAPI ISF_Desktop_Constructor (
 942                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 943 {
 944     static IGenericSFImpl *cached_sf;
 945     WCHAR szMyPath[MAX_PATH];
 946
 947     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 948
 949     if (!ppv)
 950         return E_POINTER;
 951     if (pUnkOuter)
 952         return CLASS_E_NOAGGREGATION;
 953
 954     if (!cached_sf)
 955     {
 956         IGenericSFImpl *sf;
 957
 958         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 959             return E_UNEXPECTED;
 960
 961         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IGenericSFImpl) );
 962         if (!sf)
 963             return E_OUTOFMEMORY;
 964
 965         sf->ref = 1;
 966         sf->lpVtbl = &vt_MCFldr_ShellFolder2;
 967         sf->lpPF2 = &vt_FSFldr_PersistFolder2;
 968         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 969         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 970         lstrcpyW( sf->sPathTarget, szMyPath );
 971
 972         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 973         {
 974             /* some other thread already been here */
 975             SHFree( sf->pidlRoot );
 976             SHFree( sf->sPathTarget );
 977             LocalFree( sf );
 978         }
 979     }
 980
 981     return IUnknown_QueryInterface( _IUnknown_(cached_sf), riid, ppv );
 982 }