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
  34 #include "winerror.h"
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winreg.h"
  38 #include "wingdi.h"
  39 #include "winuser.h"
  40
  41 #include "ole2.h"
  42 #include "shlguid.h"
  43
  44 #include "pidl.h"
  45 #include "undocshell.h"
  46 #include "shell32_main.h"
  47 #include "shresdef.h"
  48 #include "shlwapi.h"
  49 #include "shellfolder.h"
  50 #include "wine/debug.h"
  51 #include "debughlp.h"
  52 #include "shfldr.h"
  53
  54 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  55
  56 /* Undocumented functions from shdocvw */
  57 extern HRESULT WINAPI IEParseDisplayNameWithBCW(DWORD codepage, LPCWSTR lpszDisplayName, LPBC pbc, LPITEMIDLIST *ppidl);
  58
  59 /***********************************************************************
  60 *     Desktopfolder implementation
  61 */
  62
  63 typedef struct {
  64     IShellFolder2 IShellFolder2_iface;
  65     IPersistFolder2 IPersistFolder2_iface;
  66     LONG ref;
  67
  68     /* both paths are parsible from the desktop */
  69     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  70     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  71
  72     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  73     BOOL fAcceptFmt;        /* flag for pending Drop */
  74 } IDesktopFolderImpl;
  75
  76 static IDesktopFolderImpl *cached_sf;
  77
  78 static inline IDesktopFolderImpl *impl_from_IShellFolder2(IShellFolder2 *iface)
  79 {
  80     return CONTAINING_RECORD(iface, IDesktopFolderImpl, IShellFolder2_iface);
  81 }
  82
  83 static inline IDesktopFolderImpl *impl_from_IPersistFolder2( IPersistFolder2 *iface )
  84 {
  85     return CONTAINING_RECORD(iface, IDesktopFolderImpl, IPersistFolder2_iface);
  86 }
  87
  88 static const shvheader desktop_header[] = {
  89     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  90     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  91     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  92     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  93     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  94 };
  95
  96 #define DESKTOPSHELLVIEWCOLUMNS sizeof(desktop_header)/sizeof(shvheader)
  97
  98 /**************************************************************************
  99  *    ISF_Desktop_fnQueryInterface
 100  *
 101  */
 102 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
 103                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
 104 {
 105     IDesktopFolderImpl *This = impl_from_IShellFolder2(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->IShellFolder2_iface;
 116     }
 117     else if (IsEqualIID (riid, &IID_IPersist) ||
 118              IsEqualIID (riid, &IID_IPersistFolder) ||
 119              IsEqualIID (riid, &IID_IPersistFolder2))
 120     {
 121         *ppvObj = &This->IPersistFolder2_iface;
 122     }
 123
 124     if (*ppvObj)
 125     {
 126         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 127         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 128         return S_OK;
 129     }
 130     TRACE ("-- Interface: E_NOINTERFACE\n");
 131     return E_NOINTERFACE;
 132 }
 133
 134 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 135 {
 136     return 2; /* non-heap based object */
 137 }
 138
 139 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 140 {
 141     return 1; /* non-heap based object */
 142 }
 143
 144 /**************************************************************************
 145  *    ISF_Desktop_fnParseDisplayName
 146  *
 147  * NOTES
 148  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 149  *    to MyComputer
 150  */
 151 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 152                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 153                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 154 {
 155     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 156     IShellFolder *shell_folder = (IShellFolder*)iface;
 157     WCHAR szElement[MAX_PATH];
 158     LPCWSTR szNext = NULL;
 159     LPITEMIDLIST pidlTemp = NULL;
 160     PARSEDURLW urldata;
 161     HRESULT hr = S_OK;
 162     CLSID clsid;
 163
 164     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 165            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 166            pchEaten, ppidl, pdwAttributes);
 167
 168     if (!ppidl) return E_INVALIDARG;
 169     *ppidl = 0;
 170
 171     if (!lpszDisplayName) return E_INVALIDARG;
 172
 173     if (pchEaten)
 174         *pchEaten = 0;        /* strange but like the original */
 175
 176     urldata.cbSize = sizeof(urldata);
 177
 178     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 179     {
 180         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 181         TRACE ("-- element: %s\n", debugstr_w (szElement));
 182         SHCLSIDFromStringW (szElement + 2, &clsid);
 183         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 184     }
 185     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 186     {
 187         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 188         if (UNIXFS_is_rooted_at_desktop())
 189             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 190         else
 191             pidlTemp = _ILCreateMyComputer ();
 192         szNext = lpszDisplayName;
 193     }
 194     else if (PathIsUNCW(lpszDisplayName))
 195     {
 196         pidlTemp = _ILCreateNetwork();
 197         szNext = lpszDisplayName;
 198     }
 199     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 200     {
 201         *ppidl = pidlTemp;
 202         return S_OK;
 203     }
 204     else if (SUCCEEDED(ParseURLW(lpszDisplayName, &urldata)))
 205     {
 206         if (urldata.nScheme == URL_SCHEME_SHELL) /* handle shell: urls */
 207         {
 208             TRACE ("-- shell url: %s\n", debugstr_w(urldata.pszSuffix));
 209             SHCLSIDFromStringW (urldata.pszSuffix+2, &clsid);
 210             pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 211         }
 212         else
 213             return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 214     }
 215     else
 216     {
 217         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 218
 219         if (*lpszDisplayName)
 220         {
 221             if (*lpszDisplayName == '/')
 222             {
 223                 /* UNIX paths should be parsed by unixfs */
 224                 IShellFolder *unixFS;
 225                 hr = UnixFolder_Constructor(NULL, &IID_IShellFolder, (LPVOID*)&unixFS);
 226                 if (SUCCEEDED(hr))
 227                 {
 228                     hr = IShellFolder_ParseDisplayName(unixFS, NULL, NULL,
 229                             lpszDisplayName, NULL, &pidlTemp, NULL);
 230                     IShellFolder_Release(unixFS);
 231                 }
 232             }
 233             else
 234             {
 235                 /* build a complete path to create a simple pidl */
 236                 WCHAR szPath[MAX_PATH];
 237                 LPWSTR pathPtr;
 238
 239                 lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 240                 pathPtr = PathAddBackslashW(szPath);
 241                 if (pathPtr)
 242                 {
 243                     lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 244                     hr = _ILCreateFromPathW(szPath, &pidlTemp);
 245                 }
 246                 else
 247                 {
 248                     /* should never reach here, but for completeness */
 249                     hr = E_NOT_SUFFICIENT_BUFFER;
 250                 }
 251             }
 252         }
 253         else
 254             pidlTemp = _ILCreateMyComputer();
 255
 256         szNext = NULL;
 257     }
 258
 259     if (SUCCEEDED(hr) && pidlTemp)
 260     {
 261         if (szNext && *szNext)
 262         {
 263             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 264                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 265         }
 266         else
 267         {
 268             if (pdwAttributes && *pdwAttributes)
 269                 hr = SHELL32_GetItemAttributes(shell_folder, pidlTemp, pdwAttributes);
 270         }
 271     }
 272
 273     *ppidl = pidlTemp;
 274
 275     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 276
 277     return hr;
 278 }
 279
 280 /**************************************************************************
 281  *  CreateDesktopEnumList()
 282  */
 283 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 284  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 285  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 286  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 287  'a','c','e','\0' };
 288
 289 static BOOL CreateDesktopEnumList(IEnumIDListImpl *list, DWORD dwFlags)
 290 {
 291     BOOL ret = TRUE;
 292     WCHAR szPath[MAX_PATH];
 293
 294     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 295
 296     /* enumerate the root folders */
 297     if (dwFlags & SHCONTF_FOLDERS)
 298     {
 299         HKEY hkey;
 300         UINT i;
 301
 302         /* create the pidl for This item */
 303         ret = AddToEnumList(list, _ILCreateMyComputer());
 304
 305         for (i=0; i<2; i++) {
 306             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 307                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 308             {
 309                 WCHAR iid[50];
 310                 int i=0;
 311
 312                 while (ret)
 313                 {
 314                     DWORD size;
 315                     LONG r;
 316
 317                     size = sizeof (iid) / sizeof (iid[0]);
 318                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 319                     if (ERROR_SUCCESS == r)
 320                     {
 321                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 322                         i++;
 323                     }
 324                     else if (ERROR_NO_MORE_ITEMS == r)
 325                         break;
 326                     else
 327                         ret = FALSE;
 328                 }
 329                 RegCloseKey(hkey);
 330             }
 331         }
 332     }
 333
 334     /* enumerate the elements in %windir%\desktop */
 335     ret = ret && SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 336     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 337
 338     return ret;
 339 }
 340
 341 /**************************************************************************
 342  *        ISF_Desktop_fnEnumObjects
 343  */
 344 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 345                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 346 {
 347     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 348     IEnumIDListImpl *list;
 349
 350     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 351            This, hwndOwner, dwFlags, ppEnumIDList);
 352
 353     if (!(list = IEnumIDList_Constructor()))
 354         return E_OUTOFMEMORY;
 355     CreateDesktopEnumList(list, dwFlags);
 356     *ppEnumIDList = &list->IEnumIDList_iface;
 357
 358     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 359
 360     return S_OK;
 361 }
 362
 363 /**************************************************************************
 364  *        ISF_Desktop_fnBindToObject
 365  */
 366 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 367                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 368 {
 369     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 370
 371     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 372            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 373
 374     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 375 }
 376
 377 /**************************************************************************
 378  *    ISF_Desktop_fnBindToStorage
 379  */
 380 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 381                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 382 {
 383     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 384
 385     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 386            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 387
 388     *ppvOut = NULL;
 389     return E_NOTIMPL;
 390 }
 391
 392 /**************************************************************************
 393  *     ISF_Desktop_fnCompareIDs
 394  */
 395 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 *iface,
 396                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 397 {
 398     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 399     HRESULT hr;
 400
 401     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 402     hr = SHELL32_CompareIDs(iface, lParam, pidl1, pidl2);
 403     TRACE ("-- 0x%08x\n", hr);
 404     return hr;
 405 }
 406
 407 /**************************************************************************
 408  *    ISF_Desktop_fnCreateViewObject
 409  */
 410 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 411                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 412 {
 413     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 414     LPSHELLVIEW pShellView;
 415     HRESULT hr = E_INVALIDARG;
 416
 417     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 418            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 419
 420     if (!ppvOut)
 421         return E_INVALIDARG;
 422
 423     *ppvOut = NULL;
 424
 425     if (IsEqualIID (riid, &IID_IDropTarget))
 426     {
 427         WARN ("IDropTarget not implemented\n");
 428         hr = E_NOTIMPL;
 429     }
 430     else if (IsEqualIID (riid, &IID_IContextMenu))
 431     {
 432         WARN ("IContextMenu not implemented\n");
 433         hr = E_NOTIMPL;
 434     }
 435     else if (IsEqualIID (riid, &IID_IShellView))
 436     {
 437         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 438         if (pShellView)
 439         {
 440             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 441             IShellView_Release (pShellView);
 442         }
 443     }
 444     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 445     return hr;
 446 }
 447
 448 /**************************************************************************
 449  *  ISF_Desktop_fnGetAttributesOf
 450  */
 451 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 452                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 453 {
 454     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 455     IShellFolder *shell_folder = (IShellFolder*)iface;
 456
 457     static const DWORD dwDesktopAttributes =
 458         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 459         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 460     static const DWORD dwMyComputerAttributes =
 461         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 462         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 463
 464     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 465            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 466
 467     if (!rgfInOut)
 468         return E_INVALIDARG;
 469     if (cidl && !apidl)
 470         return E_INVALIDARG;
 471
 472     if (*rgfInOut == 0)
 473         *rgfInOut = ~0;
 474
 475     if(cidl == 0) {
 476         *rgfInOut &= dwDesktopAttributes;
 477     } else {
 478         while (cidl > 0 && *apidl) {
 479             pdump (*apidl);
 480             if (_ILIsDesktop(*apidl)) {
 481                 *rgfInOut &= dwDesktopAttributes;
 482             } else if (_ILIsMyComputer(*apidl)) {
 483                 *rgfInOut &= dwMyComputerAttributes;
 484             } else {
 485                 SHELL32_GetItemAttributes ( shell_folder, *apidl, rgfInOut);
 486             }
 487             apidl++;
 488             cidl--;
 489         }
 490     }
 491     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 492     *rgfInOut &= ~SFGAO_VALIDATE;
 493
 494     TRACE ("-- result=0x%08x\n", *rgfInOut);
 495
 496     return S_OK;
 497 }
 498
 499 /**************************************************************************
 500  *    ISF_Desktop_fnGetUIObjectOf
 501  *
 502  * PARAMETERS
 503  *  HWND           hwndOwner, //[in ] Parent window for any output
 504  *  UINT           cidl,      //[in ] array size
 505  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 506  *  REFIID         riid,      //[in ] Requested Interface
 507  *  UINT*          prgfInOut, //[   ] reserved
 508  *  LPVOID*        ppvObject) //[out] Resulting Interface
 509  *
 510  */
 511 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 512                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 513                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 514 {
 515     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 516
 517     LPITEMIDLIST pidl;
 518     IUnknown *pObj = NULL;
 519     HRESULT hr = E_INVALIDARG;
 520
 521     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 522        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 523
 524     if (!ppvOut)
 525         return E_INVALIDARG;
 526
 527     *ppvOut = NULL;
 528
 529     if (IsEqualIID (riid, &IID_IContextMenu))
 530     {
 531         if (cidl > 0)
 532             return ItemMenu_Constructor((IShellFolder*)iface, This->pidlRoot, apidl, cidl, riid, ppvOut);
 533         else
 534             return BackgroundMenu_Constructor((IShellFolder*)iface, TRUE, riid, ppvOut);
 535     }
 536     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 537     {
 538         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 539                                                   This->pidlRoot, apidl, cidl);
 540         hr = S_OK;
 541     }
 542     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 543     {
 544         pidl = ILCombine (This->pidlRoot, apidl[0]);
 545         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 546         SHFree (pidl);
 547         hr = S_OK;
 548     }
 549     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 550     {
 551         pidl = ILCombine (This->pidlRoot, apidl[0]);
 552         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 553         SHFree (pidl);
 554         hr = S_OK;
 555     }
 556     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 557     {
 558         hr = IShellFolder2_QueryInterface (iface,
 559                                           &IID_IDropTarget, (LPVOID *) & pObj);
 560     }
 561     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 562               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 563     {
 564         pidl = ILCombine (This->pidlRoot, apidl[0]);
 565         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, &pObj);
 566         SHFree (pidl);
 567     }
 568     else
 569         hr = E_NOINTERFACE;
 570
 571     if (SUCCEEDED(hr) && !pObj)
 572         hr = E_OUTOFMEMORY;
 573
 574     *ppvOut = pObj;
 575     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 576     return hr;
 577 }
 578
 579 /**************************************************************************
 580  *    ISF_Desktop_fnGetDisplayNameOf
 581  *
 582  * NOTES
 583  *    special case: pidl = null gives desktop-name back
 584  */
 585 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 586                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 587 {
 588     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 589     HRESULT hr = S_OK;
 590     LPWSTR pszPath;
 591
 592     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 593     pdump (pidl);
 594
 595     if (!strRet)
 596         return E_INVALIDARG;
 597
 598     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 599     if (!pszPath)
 600         return E_OUTOFMEMORY;
 601
 602     if (_ILIsDesktop (pidl))
 603     {
 604         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 605             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 606             strcpyW(pszPath, This->sPathTarget);
 607         else
 608             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 609     }
 610     else if (_ILIsPidlSimple (pidl))
 611     {
 612         GUID const *clsid;
 613
 614         if ((clsid = _ILGetGUIDPointer (pidl)))
 615         {
 616             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 617             {
 618                 BOOL bWantsForParsing;
 619
 620                 /*
 621                  * We can only get a filesystem path from a shellfolder if the
 622                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 623                  *
 624                  * Exception: The MyComputer folder doesn't have this key,
 625                  *   but any other filesystem backed folder it needs it.
 626                  */
 627                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 628                 {
 629                     bWantsForParsing = TRUE;
 630                 }
 631                 else
 632                 {
 633                     /* get the "WantsFORPARSING" flag from the registry */
 634                     static const WCHAR clsidW[] =
 635                      { 'C','L','S','I','D','\\',0 };
 636                     static const WCHAR shellfolderW[] =
 637                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 638                     static const WCHAR wantsForParsingW[] =
 639                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 640                      'g',0 };
 641                     WCHAR szRegPath[100];
 642                     LONG r;
 643
 644                     lstrcpyW (szRegPath, clsidW);
 645                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 646                     lstrcatW (szRegPath, shellfolderW);
 647                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 648                                     wantsForParsingW, NULL, NULL, NULL);
 649                     if (r == ERROR_SUCCESS)
 650                         bWantsForParsing = TRUE;
 651                     else
 652                         bWantsForParsing = FALSE;
 653                 }
 654
 655                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 656                      bWantsForParsing)
 657                 {
 658                     /*
 659                      * we need the filesystem path to the destination folder.
 660                      * Only the folder itself can know it
 661                      */
 662                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 663                                                         pszPath,
 664                                                         MAX_PATH);
 665                 }
 666                 else
 667                 {
 668                     /* parsing name like ::{...} */
 669                     pszPath[0] = ':';
 670                     pszPath[1] = ':';
 671                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 672                 }
 673             }
 674             else
 675             {
 676                 /* user friendly name */
 677                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 678             }
 679         }
 680         else
 681         {
 682             int cLen = 0;
 683
 684             /* file system folder or file rooted at the desktop */
 685             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 686                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 687             {
 688                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 689                 PathAddBackslashW(pszPath);
 690                 cLen = lstrlenW(pszPath);
 691             }
 692
 693             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 694
 695             if (!_ILIsFolder(pidl))
 696                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 697         }
 698     }
 699     else
 700     {
 701         /* a complex pidl, let the subfolder do the work */
 702         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 703                                             pszPath, MAX_PATH);
 704     }
 705
 706     if (SUCCEEDED(hr))
 707     {
 708         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 709         if (GetVersion() & 0x80000000)
 710         {
 711             strRet->uType = STRRET_CSTR;
 712             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 713                                      NULL, NULL))
 714                 strRet->u.cStr[0] = '\0';
 715             CoTaskMemFree(pszPath);
 716         }
 717         else
 718         {
 719             strRet->uType = STRRET_WSTR;
 720             strRet->u.pOleStr = pszPath;
 721         }
 722     }
 723     else
 724         CoTaskMemFree(pszPath);
 725
 726     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 727     strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 728     debugstr_w(strRet->u.pOleStr), hr);
 729     return hr;
 730 }
 731
 732 /**************************************************************************
 733  *  ISF_Desktop_fnSetNameOf
 734  *  Changes the name of a file object or subfolder, possibly changing its item
 735  *  identifier in the process.
 736  *
 737  * PARAMETERS
 738  *  HWND          hwndOwner,  //[in ] Owner window for output
 739  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 740  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 741  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 742  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 743  */
 744 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 745                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 746                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 747 {
 748     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 749
 750     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p) stub\n", This, hwndOwner, pidl,
 751            debugstr_w (lpName), dwFlags, pPidlOut);
 752
 753     return E_FAIL;
 754 }
 755
 756 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 757                 GUID * pguid)
 758 {
 759     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 760     FIXME ("(%p)->(%p) stub\n", This, pguid);
 761     return E_NOTIMPL;
 762 }
 763
 764 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 765                 IEnumExtraSearch ** ppenum)
 766 {
 767     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 768     FIXME ("(%p)->(%p) stub\n", This, ppenum);
 769     return E_NOTIMPL;
 770 }
 771
 772 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 773                 DWORD reserved, ULONG * pSort, ULONG * pDisplay)
 774 {
 775     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 776
 777     TRACE ("(%p)->(%d %p %p)\n", This, reserved, pSort, pDisplay);
 778
 779     if (pSort)
 780         *pSort = 0;
 781     if (pDisplay)
 782         *pDisplay = 0;
 783
 784     return S_OK;
 785 }
 786 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 787                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 788 {
 789     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 790
 791     TRACE ("(%p)->(%d %p)\n", This, iColumn, pcsFlags);
 792
 793     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 794     return E_INVALIDARG;
 795
 796     *pcsFlags = desktop_header[iColumn].pcsFlags;
 797
 798     return S_OK;
 799 }
 800
 801 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 802                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 803 {
 804     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 805     FIXME ("(%p)->(%p %p %p) stub\n", This, pidl, pscid, pv);
 806     return E_NOTIMPL;
 807 }
 808
 809 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 810                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 811 {
 812     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 813
 814     HRESULT hr = S_OK;
 815
 816     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 817
 818     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 819         return E_INVALIDARG;
 820
 821     if (!pidl)
 822         return SHELL32_GetColumnDetails(desktop_header, iColumn, psd);
 823
 824     /* the data from the pidl */
 825     psd->str.uType = STRRET_CSTR;
 826     switch (iColumn)
 827     {
 828     case 0:        /* name */
 829         hr = IShellFolder2_GetDisplayNameOf(iface, pidl,
 830                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 831         break;
 832     case 1:        /* size */
 833         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 834         break;
 835     case 2:        /* type */
 836         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 837         break;
 838     case 3:        /* date */
 839         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 840         break;
 841     case 4:        /* attributes */
 842         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 843         break;
 844     }
 845
 846     return hr;
 847 }
 848
 849 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 850                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 851 {
 852     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 853     FIXME ("(%p)->(%d %p) stub\n", This, column, pscid);
 854     return E_NOTIMPL;
 855 }
 856
 857 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 858 {
 859     ISF_Desktop_fnQueryInterface,
 860     ISF_Desktop_fnAddRef,
 861     ISF_Desktop_fnRelease,
 862     ISF_Desktop_fnParseDisplayName,
 863     ISF_Desktop_fnEnumObjects,
 864     ISF_Desktop_fnBindToObject,
 865     ISF_Desktop_fnBindToStorage,
 866     ISF_Desktop_fnCompareIDs,
 867     ISF_Desktop_fnCreateViewObject,
 868     ISF_Desktop_fnGetAttributesOf,
 869     ISF_Desktop_fnGetUIObjectOf,
 870     ISF_Desktop_fnGetDisplayNameOf,
 871     ISF_Desktop_fnSetNameOf,
 872     /* ShellFolder2 */
 873     ISF_Desktop_fnGetDefaultSearchGUID,
 874     ISF_Desktop_fnEnumSearches,
 875     ISF_Desktop_fnGetDefaultColumn,
 876     ISF_Desktop_fnGetDefaultColumnState,
 877     ISF_Desktop_fnGetDetailsEx,
 878     ISF_Desktop_fnGetDetailsOf,
 879     ISF_Desktop_fnMapColumnToSCID
 880 };
 881
 882 /**************************************************************************
 883  *    IPersist
 884  */
 885 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnQueryInterface(
 886     IPersistFolder2 *iface, REFIID riid, LPVOID *ppvObj)
 887 {
 888     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 889     return IShellFolder2_QueryInterface(&This->IShellFolder2_iface, riid, ppvObj);
 890 }
 891
 892 static ULONG WINAPI ISF_Desktop_IPersistFolder2_fnAddRef(
 893     IPersistFolder2 *iface)
 894 {
 895     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 896     return IShellFolder2_AddRef(&This->IShellFolder2_iface);
 897 }
 898
 899 static ULONG WINAPI ISF_Desktop_IPersistFolder2_fnRelease(
 900     IPersistFolder2 *iface)
 901 {
 902     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 903     return IShellFolder2_Release(&This->IShellFolder2_iface);
 904 }
 905
 906 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnGetClassID(
 907     IPersistFolder2 *iface, CLSID *clsid)
 908 {
 909     *clsid = CLSID_ShellDesktop;
 910     return S_OK;
 911 }
 912 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnInitialize(
 913     IPersistFolder2 *iface, LPCITEMIDLIST pidl)
 914 {
 915     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 916     FIXME ("(%p)->(%p) stub\n", This, pidl);
 917     return E_NOTIMPL;
 918 }
 919 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnGetCurFolder(
 920     IPersistFolder2 *iface, LPITEMIDLIST *ppidl)
 921 {
 922     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 923     *ppidl = ILClone(This->pidlRoot);
 924     return S_OK;
 925 }
 926
 927 static const IPersistFolder2Vtbl vt_IPersistFolder2 =
 928 {
 929     ISF_Desktop_IPersistFolder2_fnQueryInterface,
 930     ISF_Desktop_IPersistFolder2_fnAddRef,
 931     ISF_Desktop_IPersistFolder2_fnRelease,
 932     ISF_Desktop_IPersistFolder2_fnGetClassID,
 933     ISF_Desktop_IPersistFolder2_fnInitialize,
 934     ISF_Desktop_IPersistFolder2_fnGetCurFolder
 935 };
 936
 937 void release_desktop_folder(void)
 938 {
 939     if (!cached_sf) return;
 940     SHFree(cached_sf->pidlRoot);
 941     SHFree(cached_sf->sPathTarget);
 942     LocalFree(cached_sf);
 943 }
 944
 945 /**************************************************************************
 946  *    ISF_Desktop_Constructor
 947  */
 948 HRESULT WINAPI ISF_Desktop_Constructor (
 949                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 950 {
 951     WCHAR szMyPath[MAX_PATH];
 952
 953     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 954
 955     if (!ppv)
 956         return E_POINTER;
 957     if (pUnkOuter)
 958         return CLASS_E_NOAGGREGATION;
 959
 960     if (!cached_sf)
 961     {
 962         IDesktopFolderImpl *sf;
 963
 964         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 965             return E_UNEXPECTED;
 966
 967         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IDesktopFolderImpl) );
 968         if (!sf)
 969             return E_OUTOFMEMORY;
 970
 971         sf->ref = 1;
 972         sf->IShellFolder2_iface.lpVtbl = &vt_MCFldr_ShellFolder2;
 973         sf->IPersistFolder2_iface.lpVtbl = &vt_IPersistFolder2;
 974         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 975         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 976         lstrcpyW( sf->sPathTarget, szMyPath );
 977
 978         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 979         {
 980             /* some other thread already been here */
 981             SHFree( sf->pidlRoot );
 982             SHFree( sf->sPathTarget );
 983             LocalFree( sf );
 984         }
 985     }
 986
 987     return IShellFolder2_QueryInterface( &cached_sf->IShellFolder2_iface, riid, ppv );
 988 }