git.oblomov.eu Git - wine/blob - 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     const IPersistVtbl *lpVtblIPersist;
  69     LONG ref;
  70
  71     /* both paths are parsible from the desktop */
  72     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  73     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  74
  75     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  76     BOOL fAcceptFmt;        /* flag for pending Drop */
  77 } IGenericSFImpl;
  78
  79 #define _IUnknown_(This)    (IShellFolder*)&(This->lpVtbl)
  80 #define _IShellFolder_(This)    (IShellFolder*)&(This->lpVtbl)
  81
  82 static inline IGenericSFImpl *impl_from_IPersist( IPersist *iface )
  83 {
  84     return (IGenericSFImpl *)((char*)iface - FIELD_OFFSET(IGenericSFImpl, lpVtblIPersist));
  85 }
  86
  87 static const shvheader DesktopSFHeader[] = {
  88     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  89     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  90     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  91     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  92     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  93 };
  94
  95 #define DESKTOPSHELLVIEWCOLUMNS 5
  96
  97 /**************************************************************************
  98  *    ISF_Desktop_fnQueryInterface
  99  *
 100  * NOTES supports not IPersistFolder
 101  */
 102 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
 103                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
 104 {
 105     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 106
 107     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 108
 109     *ppvObj = NULL;
 110
 111     if (IsEqualIID (riid, &IID_IUnknown) ||
 112         IsEqualIID (riid, &IID_IShellFolder) ||
 113         IsEqualIID (riid, &IID_IShellFolder2))
 114     {
 115         *ppvObj = This;
 116     }
 117     else if (IsEqualIID (riid, &IID_IPersist))
 118     {
 119         *ppvObj = &This->lpVtblIPersist;
 120     }
 121
 122     if (*ppvObj)
 123     {
 124         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 125         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 126         return S_OK;
 127     }
 128     TRACE ("-- Interface: E_NOINTERFACE\n");
 129     return E_NOINTERFACE;
 130 }
 131
 132 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 133 {
 134     return 2; /* non-heap based object */
 135 }
 136
 137 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 138 {
 139     return 1; /* non-heap based object */
 140 }
 141
 142 /**************************************************************************
 143  *    ISF_Desktop_fnParseDisplayName
 144  *
 145  * NOTES
 146  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 147  *    to MyComputer
 148  */
 149 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 150                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 151                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 152 {
 153     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 154     WCHAR szElement[MAX_PATH];
 155     LPCWSTR szNext = NULL;
 156     LPITEMIDLIST pidlTemp = NULL;
 157     HRESULT hr = S_OK;
 158     CLSID clsid;
 159
 160     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 161            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 162            pchEaten, ppidl, pdwAttributes);
 163
 164     if (!ppidl) return E_INVALIDARG;
 165     *ppidl = 0;
 166
 167     if (!lpszDisplayName) return E_INVALIDARG;
 168
 169     if (pchEaten)
 170         *pchEaten = 0;        /* strange but like the original */
 171
 172     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 173     {
 174         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 175         TRACE ("-- element: %s\n", debugstr_w (szElement));
 176         SHCLSIDFromStringW (szElement + 2, &clsid);
 177         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 178     }
 179     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 180     {
 181         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 182         if (UNIXFS_is_rooted_at_desktop())
 183             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 184         else
 185             pidlTemp = _ILCreateMyComputer ();
 186         szNext = lpszDisplayName;
 187     }
 188     else if (PathIsUNCW(lpszDisplayName))
 189     {
 190         pidlTemp = _ILCreateNetwork();
 191         szNext = lpszDisplayName;
 192     }
 193     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 194     {
 195         *ppidl = pidlTemp;
 196         return S_OK;
 197     }
 198     else if (strchrW(lpszDisplayName,':'))
 199     {
 200         PARSEDURLW urldata;
 201
 202         urldata.cbSize = sizeof(urldata);
 203         ParseURLW(lpszDisplayName,&urldata);
 204
 205         if (urldata.nScheme == URL_SCHEME_SHELL) /* handle shell: urls */
 206         {
 207             TRACE ("-- shell url: %s\n", debugstr_w(urldata.pszSuffix));
 208             SHCLSIDFromStringW (urldata.pszSuffix+2, &clsid);
 209             pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 210         }
 211         else
 212             return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 213     }
 214     else
 215     {
 216         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 217
 218         if (*lpszDisplayName)
 219         {
 220             WCHAR szPath[MAX_PATH];
 221             LPWSTR pathPtr;
 222
 223             /* build a complete path to create a simple pidl */
 224             lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 225             pathPtr = PathAddBackslashW(szPath);
 226             if (pathPtr)
 227             {
 228                 lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 229                 hr = _ILCreateFromPathW(szPath, &pidlTemp);
 230             }
 231             else
 232             {
 233                 /* should never reach here, but for completeness */
 234                 hr = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
 235             }
 236         }
 237         else
 238             pidlTemp = _ILCreateMyComputer();
 239
 240         szNext = NULL;
 241     }
 242
 243     if (SUCCEEDED(hr) && pidlTemp)
 244     {
 245         if (szNext && *szNext)
 246         {
 247             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 248                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 249         }
 250         else
 251         {
 252             if (pdwAttributes && *pdwAttributes)
 253                 hr = SHELL32_GetItemAttributes(_IShellFolder_ (This),
 254                                                pidlTemp, pdwAttributes);
 255         }
 256     }
 257
 258     *ppidl = pidlTemp;
 259
 260     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 261
 262     return hr;
 263 }
 264
 265 /**************************************************************************
 266  *  CreateDesktopEnumList()
 267  */
 268 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 269  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 270  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 271  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 272  'a','c','e','\0' };
 273
 274 static BOOL CreateDesktopEnumList(IEnumIDList *list, DWORD dwFlags)
 275 {
 276     BOOL ret = TRUE;
 277     WCHAR szPath[MAX_PATH];
 278
 279     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 280
 281     /* enumerate the root folders */
 282     if (dwFlags & SHCONTF_FOLDERS)
 283     {
 284         HKEY hkey;
 285         UINT i;
 286
 287         /* create the pidl for This item */
 288         ret = AddToEnumList(list, _ILCreateMyComputer());
 289
 290         for (i=0; i<2; i++) {
 291             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 292                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 293             {
 294                 WCHAR iid[50];
 295                 int i=0;
 296
 297                 while (ret)
 298                 {
 299                     DWORD size;
 300                     LONG r;
 301
 302                     size = sizeof (iid) / sizeof (iid[0]);
 303                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 304                     if (ERROR_SUCCESS == r)
 305                     {
 306                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 307                         i++;
 308                     }
 309                     else if (ERROR_NO_MORE_ITEMS == r)
 310                         break;
 311                     else
 312                         ret = FALSE;
 313                 }
 314                 RegCloseKey(hkey);
 315             }
 316         }
 317     }
 318
 319     /* enumerate the elements in %windir%\desktop */
 320     SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 321     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 322
 323     return ret;
 324 }
 325
 326 /**************************************************************************
 327  *        ISF_Desktop_fnEnumObjects
 328  */
 329 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 330                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 331 {
 332     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 333
 334     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 335            This, hwndOwner, dwFlags, ppEnumIDList);
 336
 337     *ppEnumIDList = IEnumIDList_Constructor();
 338     if (*ppEnumIDList)
 339         CreateDesktopEnumList(*ppEnumIDList, dwFlags);
 340
 341     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 342
 343     return *ppEnumIDList ? S_OK : E_OUTOFMEMORY;
 344 }
 345
 346 /**************************************************************************
 347  *        ISF_Desktop_fnBindToObject
 348  */
 349 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 350                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 351 {
 352     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 353
 354     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 355            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 356
 357     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 358 }
 359
 360 /**************************************************************************
 361  *    ISF_Desktop_fnBindToStorage
 362  */
 363 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 364                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 365 {
 366     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 367
 368     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 369            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 370
 371     *ppvOut = NULL;
 372     return E_NOTIMPL;
 373 }
 374
 375 /**************************************************************************
 376  *     ISF_Desktop_fnCompareIDs
 377  */
 378 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 * iface,
 379                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 380 {
 381     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 382     int nReturn;
 383
 384     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 385     nReturn = SHELL32_CompareIDs (_IShellFolder_ (This), lParam, pidl1, pidl2);
 386     TRACE ("-- %i\n", nReturn);
 387     return nReturn;
 388 }
 389
 390 /**************************************************************************
 391  *    ISF_Desktop_fnCreateViewObject
 392  */
 393 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 394                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 395 {
 396     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 397     LPSHELLVIEW pShellView;
 398     HRESULT hr = E_INVALIDARG;
 399
 400     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 401            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 402
 403     if (!ppvOut)
 404         return hr;
 405
 406     *ppvOut = NULL;
 407
 408     if (IsEqualIID (riid, &IID_IDropTarget))
 409     {
 410         WARN ("IDropTarget not implemented\n");
 411         hr = E_NOTIMPL;
 412     }
 413     else if (IsEqualIID (riid, &IID_IContextMenu))
 414     {
 415         WARN ("IContextMenu not implemented\n");
 416         hr = E_NOTIMPL;
 417     }
 418     else if (IsEqualIID (riid, &IID_IShellView))
 419     {
 420         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 421         if (pShellView)
 422         {
 423             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 424             IShellView_Release (pShellView);
 425         }
 426     }
 427     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 428     return hr;
 429 }
 430
 431 /**************************************************************************
 432  *  ISF_Desktop_fnGetAttributesOf
 433  */
 434 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 435                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 436 {
 437     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 438     HRESULT hr = S_OK;
 439     static const DWORD dwDesktopAttributes =
 440         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 441         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 442     static const DWORD dwMyComputerAttributes =
 443         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 444         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 445
 446     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 447            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 448
 449     if (!rgfInOut)
 450         return E_INVALIDARG;
 451     if (cidl && !apidl)
 452         return E_INVALIDARG;
 453
 454     if (*rgfInOut == 0)
 455         *rgfInOut = ~0;
 456
 457     if(cidl == 0) {
 458         *rgfInOut &= dwDesktopAttributes;
 459     } else {
 460         while (cidl > 0 && *apidl) {
 461             pdump (*apidl);
 462             if (_ILIsDesktop(*apidl)) {
 463                 *rgfInOut &= dwDesktopAttributes;
 464             } else if (_ILIsMyComputer(*apidl)) {
 465                 *rgfInOut &= dwMyComputerAttributes;
 466             } else {
 467                 SHELL32_GetItemAttributes (_IShellFolder_ (This), *apidl, rgfInOut);
 468             }
 469             apidl++;
 470             cidl--;
 471         }
 472     }
 473     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 474     *rgfInOut &= ~SFGAO_VALIDATE;
 475
 476     TRACE ("-- result=0x%08x\n", *rgfInOut);
 477
 478     return hr;
 479 }
 480
 481 /**************************************************************************
 482  *    ISF_Desktop_fnGetUIObjectOf
 483  *
 484  * PARAMETERS
 485  *  HWND           hwndOwner, //[in ] Parent window for any output
 486  *  UINT           cidl,      //[in ] array size
 487  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 488  *  REFIID         riid,      //[in ] Requested Interface
 489  *  UINT*          prgfInOut, //[   ] reserved
 490  *  LPVOID*        ppvObject) //[out] Resulting Interface
 491  *
 492  */
 493 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 494                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 495                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 496 {
 497     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 498
 499     LPITEMIDLIST pidl;
 500     IUnknown *pObj = NULL;
 501     HRESULT hr = E_INVALIDARG;
 502
 503     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 504        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 505
 506     if (!ppvOut)
 507         return hr;
 508
 509     *ppvOut = NULL;
 510
 511     if (IsEqualIID (riid, &IID_IContextMenu))
 512     {
 513         if (cidl > 0)
 514             pObj = (LPUNKNOWN) ISvItemCm_Constructor( (IShellFolder *) iface, This->pidlRoot, apidl, cidl);
 515         else
 516             pObj = (LPUNKNOWN) ISvBgCm_Constructor( (IShellFolder *) iface, TRUE);
 517         hr = S_OK;
 518     }
 519     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 520     {
 521         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 522                                                   This->pidlRoot, apidl, cidl);
 523         hr = S_OK;
 524     }
 525     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 526     {
 527         pidl = ILCombine (This->pidlRoot, apidl[0]);
 528         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 529         SHFree (pidl);
 530         hr = S_OK;
 531     }
 532     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 533     {
 534         pidl = ILCombine (This->pidlRoot, apidl[0]);
 535         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 536         SHFree (pidl);
 537         hr = S_OK;
 538     }
 539     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 540     {
 541         hr = IShellFolder_QueryInterface (iface,
 542                                           &IID_IDropTarget, (LPVOID *) & pObj);
 543     }
 544     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 545               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 546     {
 547         pidl = ILCombine (This->pidlRoot, apidl[0]);
 548         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, (LPVOID*)&pObj);
 549         SHFree (pidl);
 550     }
 551     else
 552         hr = E_NOINTERFACE;
 553
 554     if (SUCCEEDED(hr) && !pObj)
 555         hr = E_OUTOFMEMORY;
 556
 557     *ppvOut = pObj;
 558     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 559     return hr;
 560 }
 561
 562 /**************************************************************************
 563  *    ISF_Desktop_fnGetDisplayNameOf
 564  *
 565  * NOTES
 566  *    special case: pidl = null gives desktop-name back
 567  */
 568 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 569                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 570 {
 571     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 572     HRESULT hr = S_OK;
 573     LPWSTR pszPath;
 574
 575     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 576     pdump (pidl);
 577
 578     if (!strRet)
 579         return E_INVALIDARG;
 580
 581     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 582     if (!pszPath)
 583         return E_OUTOFMEMORY;
 584
 585     if (_ILIsDesktop (pidl))
 586     {
 587         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 588             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 589             strcpyW(pszPath, This->sPathTarget);
 590         else
 591             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 592     }
 593     else if (_ILIsPidlSimple (pidl))
 594     {
 595         GUID const *clsid;
 596
 597         if ((clsid = _ILGetGUIDPointer (pidl)))
 598         {
 599             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 600             {
 601                 int bWantsForParsing;
 602
 603                 /*
 604                  * We can only get a filesystem path from a shellfolder if the
 605                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 606                  *
 607                  * Exception: The MyComputer folder doesn't have this key,
 608                  *   but any other filesystem backed folder it needs it.
 609                  */
 610                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 611                 {
 612                     bWantsForParsing = TRUE;
 613                 }
 614                 else
 615                 {
 616                     /* get the "WantsFORPARSING" flag from the registry */
 617                     static const WCHAR clsidW[] =
 618                      { 'C','L','S','I','D','\\',0 };
 619                     static const WCHAR shellfolderW[] =
 620                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 621                     static const WCHAR wantsForParsingW[] =
 622                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 623                      'g',0 };
 624                     WCHAR szRegPath[100];
 625                     LONG r;
 626
 627                     lstrcpyW (szRegPath, clsidW);
 628                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 629                     lstrcatW (szRegPath, shellfolderW);
 630                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 631                                     wantsForParsingW, NULL, NULL, NULL);
 632                     if (r == ERROR_SUCCESS)
 633                         bWantsForParsing = TRUE;
 634                     else
 635                         bWantsForParsing = FALSE;
 636                 }
 637
 638                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 639                      bWantsForParsing)
 640                 {
 641                     /*
 642                      * we need the filesystem path to the destination folder.
 643                      * Only the folder itself can know it
 644                      */
 645                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 646                                                         pszPath,
 647                                                         MAX_PATH);
 648                 }
 649                 else
 650                 {
 651                     /* parsing name like ::{...} */
 652                     pszPath[0] = ':';
 653                     pszPath[1] = ':';
 654                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 655                 }
 656             }
 657             else
 658             {
 659                 /* user friendly name */
 660                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 661             }
 662         }
 663         else
 664         {
 665             int cLen = 0;
 666
 667             /* file system folder or file rooted at the desktop */
 668             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 669                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 670             {
 671                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 672                 PathAddBackslashW(pszPath);
 673                 cLen = lstrlenW(pszPath);
 674             }
 675
 676             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 677
 678             if (!_ILIsFolder(pidl))
 679                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 680         }
 681     }
 682     else
 683     {
 684         /* a complex pidl, let the subfolder do the work */
 685         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 686                                             pszPath, MAX_PATH);
 687     }
 688
 689     if (SUCCEEDED(hr))
 690     {
 691         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 692         if (GetVersion() & 0x80000000)
 693         {
 694             strRet->uType = STRRET_CSTR;
 695             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 696                                      NULL, NULL))
 697                 strRet->u.cStr[0] = '\0';
 698             CoTaskMemFree(pszPath);
 699         }
 700         else
 701         {
 702             strRet->uType = STRRET_WSTR;
 703             strRet->u.pOleStr = pszPath;
 704         }
 705     }
 706     else
 707         CoTaskMemFree(pszPath);
 708
 709     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 710      strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 711      debugstr_w(strRet->u.pOleStr), hr);
 712     return hr;
 713 }
 714
 715 /**************************************************************************
 716  *  ISF_Desktop_fnSetNameOf
 717  *  Changes the name of a file object or subfolder, possibly changing its item
 718  *  identifier in the process.
 719  *
 720  * PARAMETERS
 721  *  HWND          hwndOwner,  //[in ] Owner window for output
 722  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 723  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 724  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 725  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 726  */
 727 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 728                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 729                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 730 {
 731     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 732
 733     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p)\n", This, hwndOwner, pidl,
 734            debugstr_w (lpName), dwFlags, pPidlOut);
 735
 736     return E_FAIL;
 737 }
 738
 739 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 740                 GUID * pguid)
 741 {
 742     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 743
 744     FIXME ("(%p)\n", This);
 745     return E_NOTIMPL;
 746 }
 747
 748 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 749                 IEnumExtraSearch ** ppenum)
 750 {
 751     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 752     FIXME ("(%p)\n", This);
 753     return E_NOTIMPL;
 754 }
 755
 756 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 757                 DWORD dwRes, ULONG * pSort, ULONG * pDisplay)
 758 {
 759     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 760
 761     TRACE ("(%p)\n", This);
 762
 763     if (pSort)
 764         *pSort = 0;
 765     if (pDisplay)
 766         *pDisplay = 0;
 767
 768     return S_OK;
 769 }
 770 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 771                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 772 {
 773     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 774
 775     TRACE ("(%p)\n", This);
 776
 777     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 778     return E_INVALIDARG;
 779
 780     *pcsFlags = DesktopSFHeader[iColumn].pcsFlags;
 781
 782     return S_OK;
 783 }
 784
 785 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 786                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 787 {
 788     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 789     FIXME ("(%p)\n", This);
 790
 791     return E_NOTIMPL;
 792 }
 793
 794 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 795                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 796 {
 797     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 798
 799     HRESULT hr = S_OK;
 800
 801     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 802
 803     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 804         return E_INVALIDARG;
 805
 806     if (!pidl)
 807     {
 808         psd->fmt = DesktopSFHeader[iColumn].fmt;
 809         psd->cxChar = DesktopSFHeader[iColumn].cxChar;
 810         psd->str.uType = STRRET_CSTR;
 811         LoadStringA (shell32_hInstance, DesktopSFHeader[iColumn].colnameid,
 812                      psd->str.u.cStr, MAX_PATH);
 813         return S_OK;
 814     }
 815
 816     /* the data from the pidl */
 817     psd->str.uType = STRRET_CSTR;
 818     switch (iColumn)
 819     {
 820     case 0:        /* name */
 821         hr = IShellFolder_GetDisplayNameOf(iface, pidl,
 822                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 823         break;
 824     case 1:        /* size */
 825         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 826         break;
 827     case 2:        /* type */
 828         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 829         break;
 830     case 3:        /* date */
 831         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 832         break;
 833     case 4:        /* attributes */
 834         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 835         break;
 836     }
 837
 838     return hr;
 839 }
 840
 841 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 842                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 843 {
 844     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 845     FIXME ("(%p)\n", This);
 846     return E_NOTIMPL;
 847 }
 848
 849 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 850 {
 851     ISF_Desktop_fnQueryInterface,
 852     ISF_Desktop_fnAddRef,
 853     ISF_Desktop_fnRelease,
 854     ISF_Desktop_fnParseDisplayName,
 855     ISF_Desktop_fnEnumObjects,
 856     ISF_Desktop_fnBindToObject,
 857     ISF_Desktop_fnBindToStorage,
 858     ISF_Desktop_fnCompareIDs,
 859     ISF_Desktop_fnCreateViewObject,
 860     ISF_Desktop_fnGetAttributesOf,
 861     ISF_Desktop_fnGetUIObjectOf,
 862     ISF_Desktop_fnGetDisplayNameOf,
 863     ISF_Desktop_fnSetNameOf,
 864     /* ShellFolder2 */
 865     ISF_Desktop_fnGetDefaultSearchGUID,
 866     ISF_Desktop_fnEnumSearches,
 867     ISF_Desktop_fnGetDefaultColumn,
 868     ISF_Desktop_fnGetDefaultColumnState,
 869     ISF_Desktop_fnGetDetailsEx,
 870     ISF_Desktop_fnGetDetailsOf,
 871     ISF_Desktop_fnMapColumnToSCID
 872 };
 873
 874 /**************************************************************************
 875  *    IPersist
 876  */
 877 static HRESULT WINAPI ISF_Desktop_IPersist_fnQueryInterface(
 878     IPersist *iface, REFIID riid, LPVOID *ppvObj)
 879 {
 880     IGenericSFImpl *This = impl_from_IPersist( iface );
 881     return IShellFolder2_QueryInterface((IShellFolder2*)This, riid, ppvObj);
 882 }
 883
 884 static ULONG WINAPI ISF_Desktop_IPersist_fnAddRef(IPersist *iface)
 885 {
 886     IGenericSFImpl *This = impl_from_IPersist( iface );
 887     return IShellFolder2_AddRef((IShellFolder2*)This);
 888 }
 889
 890 static ULONG WINAPI ISF_Desktop_IPersist_fnRelease(IPersist *iface)
 891 {
 892     IGenericSFImpl *This = impl_from_IPersist( iface );
 893     return IShellFolder2_Release((IShellFolder2*)This);
 894 }
 895
 896 static HRESULT WINAPI ISF_Desktop_IPersist_fnGetClassID(IPersist *iface, CLSID *clsid)
 897 {
 898     *clsid = CLSID_ShellDesktop;
 899     return S_OK;
 900 }
 901
 902 static const IPersistVtbl vt_IPersist =
 903 {
 904     ISF_Desktop_IPersist_fnQueryInterface,
 905     ISF_Desktop_IPersist_fnAddRef,
 906     ISF_Desktop_IPersist_fnRelease,
 907     ISF_Desktop_IPersist_fnGetClassID
 908 };
 909
 910 /**************************************************************************
 911  *    ISF_Desktop_Constructor
 912  */
 913 HRESULT WINAPI ISF_Desktop_Constructor (
 914                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 915 {
 916     static IGenericSFImpl *cached_sf;
 917     WCHAR szMyPath[MAX_PATH];
 918
 919     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 920
 921     if (!ppv)
 922         return E_POINTER;
 923     if (pUnkOuter)
 924         return CLASS_E_NOAGGREGATION;
 925
 926     if (!cached_sf)
 927     {
 928         IGenericSFImpl *sf;
 929
 930         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 931             return E_UNEXPECTED;
 932
 933         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IGenericSFImpl) );
 934         if (!sf)
 935             return E_OUTOFMEMORY;
 936
 937         sf->ref = 1;
 938         sf->lpVtbl = &vt_MCFldr_ShellFolder2;
 939         sf->lpVtblIPersist = &vt_IPersist;
 940         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 941         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 942         lstrcpyW( sf->sPathTarget, szMyPath );
 943
 944         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 945         {
 946             /* some other thread already been here */
 947             SHFree( sf->pidlRoot );
 948             SHFree( sf->sPathTarget );
 949             LocalFree( sf );
 950         }
 951     }
 952
 953     return IUnknown_QueryInterface( _IUnknown_(cached_sf), riid, ppv );
 954 }