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