reactos/dll/win32/shell32/shlfolder.cpp

   1 /*
   2  *    Shell Folder stuff
   3  *
   4  *    Copyright 1997            Marcus Meissner
   5  *    Copyright 1998, 1999, 2002    Juergen Schmied
   6  *
   7  *    IShellFolder2 and related interfaces
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include "precomp.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  27
  28 /***************************************************************************
  29  *  SHELL32_GetCustomFolderAttributeFromPath (internal function)
  30  *
  31  * Gets a value from the folder's desktop.ini file, if one exists.
  32  *
  33  * PARAMETERS
  34  *  pwszFolderPath[I] Folder containing the desktop.ini file.
  35  *  pwszHeading   [I] Heading in .ini file.
  36  *  pwszAttribute [I] Attribute in .ini file.
  37  *  pwszValue     [O] Buffer to store value into.
  38  *  cchValue      [I] Size in characters including NULL of buffer pointed to
  39  *                    by pwszValue.
  40  *
  41  *  RETURNS
  42  *    TRUE if returned non-NULL value.
  43  *    FALSE otherwise.
  44  */
  45 static BOOL __inline SHELL32_GetCustomFolderAttributeFromPath(
  46     LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  47     LPWSTR pwszValue, DWORD cchValue)
  48 {
  49     static const WCHAR wszDesktopIni[] =
  50             {'d','e','s','k','t','o','p','.','i','n','i',0};
  51     static const WCHAR wszDefault[] = {0};
  52
  53     PathAddBackslashW(pwszFolderPath);
  54     PathAppendW(pwszFolderPath, wszDesktopIni);
  55     return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
  56                                     pwszValue, cchValue, pwszFolderPath);
  57 }
  58
  59 /***************************************************************************
  60  *  GetNextElement (internal function)
  61  *
  62  * Gets a part of a string till the first backslash.
  63  *
  64  * PARAMETERS
  65  *  pszNext [IN] string to get the element from
  66  *  pszOut  [IN] pointer to buffer which receives string
  67  *  dwOut   [IN] length of pszOut
  68  *
  69  *  RETURNS
  70  *    LPSTR pointer to first, not yet parsed char
  71  */
  72
  73 LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
  74 {
  75     LPCWSTR pszTail = pszNext;
  76     DWORD dwCopy;
  77
  78     TRACE ("(%s %p 0x%08x)\n", debugstr_w (pszNext), pszOut, dwOut);
  79
  80     *pszOut = 0x0000;
  81
  82     if (!pszNext || !*pszNext)
  83         return NULL;
  84
  85     while (*pszTail && (*pszTail != (WCHAR) '\\'))
  86         pszTail++;
  87
  88     dwCopy = pszTail - pszNext + 1;
  89     lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
  90
  91     if (*pszTail)
  92         pszTail++;
  93     else
  94         pszTail = NULL;
  95
  96     TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
  97     return pszTail;
  98 }
  99
 100 HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
 101                   LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
 102 {
 103     HRESULT hr = E_INVALIDARG;
 104     LPITEMIDLIST pidlIn = pidlInOut ? *pidlInOut : NULL;
 105     LPITEMIDLIST pidlOut = NULL;
 106     LPITEMIDLIST pidlTemp = NULL;
 107     CComPtr<IShellFolder> psfChild;
 108
 109     TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlIn, debugstr_w (szNext));
 110
 111     /* get the shellfolder for the child pidl and let it analyse further */
 112     hr = psf->BindToObject(pidlIn, pbc, IID_PPV_ARG(IShellFolder, &psfChild));
 113     if (FAILED(hr))
 114         return hr;
 115
 116     hr = psfChild->ParseDisplayName(hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
 117     if (FAILED(hr))
 118         return hr;
 119
 120     pidlTemp = ILCombine (pidlIn, pidlOut);
 121     if (!pidlTemp)
 122     {
 123         hr = E_OUTOFMEMORY;
 124         if (pidlOut)
 125             ILFree(pidlOut);
 126         return hr;
 127     }
 128
 129     if (pidlOut)
 130         ILFree (pidlOut);
 131
 132     if (pidlIn)
 133         ILFree (pidlIn);
 134
 135     *pidlInOut = pidlTemp;
 136
 137     TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
 138     return S_OK;
 139 }
 140
 141 /***********************************************************************
 142  *    SHELL32_CoCreateInitSF
 143  *
 144  * Creates a shell folder and initializes it with a pidl and a root folder
 145  * via IPersistFolder3 or IPersistFolder.
 146  *
 147  * NOTES
 148  *   pathRoot can be NULL for Folders being a drive.
 149  *   In this case the absolute path is built from pidlChild (eg. C:)
 150  */
 151 static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
 152                 LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
 153 {
 154     HRESULT hr;
 155     CComPtr<IShellFolder> pShellFolder;
 156
 157     TRACE ("%p %s %p\n", pidlRoot, debugstr_w(pathRoot), pidlChild);
 158
 159     hr = SHCoCreateInstance(NULL, &clsid, NULL, IID_PPV_ARG(IShellFolder, &pShellFolder));
 160     if (SUCCEEDED (hr))
 161     {
 162         LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
 163         CComPtr<IPersistFolder> ppf;
 164         CComPtr<IPersistFolder3> ppf3;
 165
 166         if ((_ILIsFolder(pidlChild) || _ILIsDrive(pidlChild)) &&
 167             SUCCEEDED(pShellFolder->QueryInterface(IID_PPV_ARG(IPersistFolder3, &ppf3))))
 168         {
 169             PERSIST_FOLDER_TARGET_INFO ppfti;
 170
 171             ZeroMemory (&ppfti, sizeof (ppfti));
 172
 173             /* fill the PERSIST_FOLDER_TARGET_INFO */
 174             ppfti.dwAttributes = -1;
 175             ppfti.csidl = -1;
 176
 177             /* build path */
 178             if (pathRoot)
 179             {
 180                 lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
 181                 PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
 182             }
 183
 184             if (pidlChild)
 185             {
 186                 int len = wcslen(ppfti.szTargetParsingName);
 187
 188                 if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
 189                     hr = E_INVALIDARG;
 190             }
 191
 192             ppf3->InitializeEx(NULL, pidlAbsolute, &ppfti);
 193         }
 194         else if (SUCCEEDED((hr = pShellFolder->QueryInterface(IID_PPV_ARG(IPersistFolder, &ppf)))))
 195         {
 196             ppf->Initialize(pidlAbsolute);
 197         }
 198         ILFree (pidlAbsolute);
 199     }
 200
 201     *ppvOut = pShellFolder.Detach();
 202
 203     TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
 204
 205     return hr;
 206 }
 207
 208 /***********************************************************************
 209  *    SHELL32_BindToChild [Internal]
 210  *
 211  * Common code for IShellFolder_BindToObject.
 212  *
 213  * PARAMS
 214  *  pidlRoot     [I] The parent shell folder's absolute pidl.
 215  *  pathRoot     [I] Absolute dos path of the parent shell folder.
 216  *  pidlComplete [I] PIDL of the child. Relative to pidlRoot.
 217  *  riid         [I] GUID of the interface, which ppvOut shall be bound to.
 218  *  ppvOut       [O] A reference to the child's interface (riid).
 219  *
 220  * NOTES
 221  *  pidlComplete has to contain at least one non empty SHITEMID.
 222  *  This function makes special assumptions on the shell namespace, which
 223  *  means you probably can't use it for your IShellFolder implementation.
 224  */
 225 HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
 226                              LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
 227 {
 228     static const WCHAR wszDotShellClassInfo[] = {
 229         '.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0 };
 230
 231     GUID const *clsid;
 232     CComPtr<IShellFolder> pSF;
 233     HRESULT hr;
 234     LPITEMIDLIST pidlChild;
 235
 236     if (!pidlRoot || !ppvOut || !pidlComplete || !pidlComplete->mkid.cb)
 237         return E_INVALIDARG;
 238
 239     *ppvOut = NULL;
 240
 241     pidlChild = ILCloneFirst (pidlComplete);
 242
 243     if ((clsid = _ILGetGUIDPointer (pidlChild))) {
 244         /* virtual folder */
 245         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, *clsid, (LPVOID *)&pSF);
 246     } else {
 247         /* file system folder */
 248         CLSID clsidFolder = CLSID_ShellFSFolder;
 249         static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
 250         WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
 251
 252         /* see if folder CLSID should be overridden by desktop.ini file */
 253         if (pathRoot) {
 254             lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
 255             pwszPathTail = PathAddBackslashW(wszFolderPath);
 256         }
 257
 258         _ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
 259
 260         if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
 261             wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
 262             CLSIDFromString (wszCLSIDValue, &clsidFolder);
 263
 264         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
 265                                      clsidFolder, (LPVOID *)&pSF);
 266     }
 267     ILFree (pidlChild);
 268
 269     if (SUCCEEDED (hr)) {
 270         if (_ILIsPidlSimple (pidlComplete)) {
 271             /* no sub folders */
 272             hr = pSF->QueryInterface(riid, ppvOut);
 273         } else {
 274             /* go deeper */
 275             hr = pSF->BindToObject(ILGetNext (pidlComplete), NULL, riid, ppvOut);
 276         }
 277     }
 278
 279     TRACE ("-- returning (%p) %08x\n", *ppvOut, hr);
 280
 281     return hr;
 282 }
 283
 284 HRESULT SHELL32_BindToGuidItem(LPCITEMIDLIST pidlRoot,
 285                                PCUIDLIST_RELATIVE pidl,
 286                                LPBC pbcReserved,
 287                                REFIID riid,
 288                                LPVOID *ppvOut)
 289 {
 290     CComPtr<IPersistFolder> pFolder;
 291     HRESULT hr;
 292
 293     GUID *pGUID = _ILGetGUIDPointer(pidl);
 294     if (!pGUID)
 295     {
 296         ERR("SHELL32_BindToGuidItem called for non guid item!\n");
 297         return E_FAIL;
 298     }
 299
 300     hr = SHCoCreateInstance(NULL, pGUID, NULL, IID_PPV_ARG(IPersistFolder, &pFolder));
 301     if (FAILED(hr))
 302         return hr;
 303
 304     hr = pFolder->Initialize(ILCombine(pidlRoot, pidl));
 305     if (FAILED(hr))
 306         return hr;
 307
 308     if (_ILIsPidlSimple (pidl))
 309     {
 310         return pFolder->QueryInterface(riid, ppvOut);
 311     }
 312     else
 313     {
 314         CComPtr<IShellFolder> psf;
 315         hr = pFolder->QueryInterface(IID_PPV_ARG(IShellFolder, &psf));
 316         if (FAILED(hr))
 317             return hr;
 318
 319         return psf->BindToObject(ILGetNext (pidl), pbcReserved, riid, ppvOut);
 320     }
 321 }
 322
 323 /***********************************************************************
 324  *    SHELL32_GetDisplayNameOfChild
 325  *
 326  * Retrieves the display name of a child object of a shellfolder.
 327  *
 328  * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 329  * - it binds to the child shellfolder [subpidl1]
 330  * - asks it for the displayname of [subpidl2][subpidl3]
 331  *
 332  * Is possible the pidl is a simple pidl. In this case it asks the
 333  * subfolder for the displayname of an empty pidl. The subfolder
 334  * returns the own displayname eg. "::{guid}". This is used for
 335  * virtual folders with the registry key WantsFORPARSING set.
 336  */
 337 HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 338                        LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 339 {
 340     LPITEMIDLIST pidlFirst = ILCloneFirst(pidl);
 341     if (!pidlFirst)
 342         return E_OUTOFMEMORY;
 343
 344     CComPtr<IShellFolder> psfChild;
 345     HRESULT hr = psf->BindToObject(pidlFirst, NULL, IID_PPV_ARG(IShellFolder, &psfChild));
 346     if (SUCCEEDED (hr))
 347     {
 348         hr = psfChild->GetDisplayNameOf(ILGetNext (pidl), dwFlags, strRet);
 349     }
 350     ILFree (pidlFirst);
 351
 352     return hr;
 353 }
 354
 355 HRESULT SHELL32_GetDisplayNameOfGUIDItem(IShellFolder2* psf, LPCWSTR pszFolderPath, PCUITEMID_CHILD pidl, DWORD dwFlags, LPSTRRET strRet)
 356 {
 357     HRESULT hr;
 358     GUID const *clsid = _ILGetGUIDPointer (pidl);
 359
 360     if (!strRet)
 361         return E_INVALIDARG;
 362
 363     /* First of all check if we need to query the name from the child item */
 364     if (GET_SHGDN_FOR (dwFlags) == SHGDN_FORPARSING &&
 365         GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL)
 366     {
 367         int bWantsForParsing;
 368
 369         /*
 370             * We can only get a filesystem path from a shellfolder if the
 371             *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 372             *
 373             * Exception: The MyComputer folder doesn't have this key,
 374             *   but any other filesystem backed folder it needs it.
 375             */
 376         if (IsEqualIID (*clsid, CLSID_MyComputer))
 377         {
 378             bWantsForParsing = TRUE;
 379         }
 380         else
 381         {
 382             HKEY hkeyClass;
 383             if (HCR_RegOpenClassIDKey(*clsid, &hkeyClass))
 384             {
 385                 LONG res = SHGetValueW(hkeyClass, L"Shellfolder", L"WantsForParsing", NULL, NULL, NULL);
 386                 bWantsForParsing = (res == ERROR_SUCCESS);
 387                 RegCloseKey(hkeyClass);
 388             }
 389         }
 390
 391         if (bWantsForParsing)
 392         {
 393             /*
 394              * we need the filesystem path to the destination folder.
 395              * Only the folder itself can know it
 396              */
 397             return SHELL32_GetDisplayNameOfChild (psf, pidl, dwFlags, strRet);
 398         }
 399     }
 400
 401     /* Allocate the buffer for the result */
 402     LPWSTR pszPath = (LPWSTR)CoTaskMemAlloc((MAX_PATH + 1) * sizeof(WCHAR));
 403     if (!pszPath)
 404         return E_OUTOFMEMORY;
 405
 406     hr = S_OK;
 407
 408     if (GET_SHGDN_FOR (dwFlags) == SHGDN_FORPARSING)
 409     {
 410         wcscpy(pszPath, pszFolderPath);
 411         PWCHAR pItemName = &pszPath[wcslen(pszPath)];
 412
 413         /* parsing name like ::{...} */
 414         pItemName[0] = ':';
 415         pItemName[1] = ':';
 416         SHELL32_GUIDToStringW (*clsid, &pItemName[2]);
 417     }
 418     else
 419     {
 420         /* user friendly name */
 421         if (!HCR_GetClassNameW (*clsid, pszPath, MAX_PATH))
 422             hr = E_FAIL;
 423     }
 424
 425     if (SUCCEEDED(hr))
 426     {
 427         strRet->uType = STRRET_WSTR;
 428         strRet->pOleStr = pszPath;
 429     }
 430     else
 431     {
 432         CoTaskMemFree(pszPath);
 433     }
 434
 435     return hr;
 436 }
 437
 438 /***********************************************************************
 439  *  SHELL32_GetItemAttributes
 440  *
 441  * NOTES
 442  * Observed values:
 443  *  folder:    0xE0000177    FILESYSTEM | HASSUBFOLDER | FOLDER
 444  *  file:    0x40000177    FILESYSTEM
 445  *  drive:    0xf0000144    FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 446  *  mycomputer:    0xb0000154    HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 447  *  (seems to be default for shell extensions if no registry entry exists)
 448  *
 449  * win2k:
 450  *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 451  *  file:      0x40400177      FILESYSTEM | CANMONIKER
 452  *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 453  *
 454  * According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
 455  * However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
 456  */
 457
 458 static const DWORD dwSupportedAttr=
 459                       SFGAO_CANCOPY |           /*0x00000001 */
 460                       SFGAO_CANMOVE |           /*0x00000002 */
 461                       SFGAO_CANLINK |           /*0x00000004 */
 462                       SFGAO_CANRENAME |         /*0x00000010 */
 463                       SFGAO_CANDELETE |         /*0x00000020 */
 464                       SFGAO_HASPROPSHEET |      /*0x00000040 */
 465                       SFGAO_DROPTARGET |        /*0x00000100 */
 466                       SFGAO_LINK |              /*0x00010000 */
 467                       SFGAO_READONLY |          /*0x00040000 */
 468                       SFGAO_HIDDEN |            /*0x00080000 */
 469                       SFGAO_FILESYSANCESTOR |   /*0x10000000 */
 470                       SFGAO_FOLDER |            /*0x20000000 */
 471                       SFGAO_FILESYSTEM |        /*0x40000000 */
 472                       SFGAO_HASSUBFOLDER;       /*0x80000000 */
 473
 474 HRESULT SHELL32_GetGuidItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 475 {
 476     if (!_ILIsSpecialFolder(pidl))
 477     {
 478         ERR("Got wrong type of pidl!\n");
 479         *pdwAttributes &= SFGAO_CANLINK;
 480         return S_OK;
 481     }
 482
 483     if (*pdwAttributes & ~dwSupportedAttr)
 484     {
 485         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 486         *pdwAttributes &= dwSupportedAttr;
 487     }
 488
 489     /* First try to get them from the registry */
 490     if (HCR_GetFolderAttributes(pidl, pdwAttributes) && *pdwAttributes)
 491     {
 492         return S_OK;
 493     }
 494     else
 495     {
 496         /* If we can't get it from the registry we have to query the child */
 497         CComPtr<IShellFolder> psf2;
 498         if (SUCCEEDED(psf->BindToObject(pidl, 0, IID_PPV_ARG(IShellFolder, &psf2))))
 499         {
 500             return psf2->GetAttributesOf(0, NULL, pdwAttributes);
 501         }
 502     }
 503
 504     *pdwAttributes &= SFGAO_CANLINK;
 505     return S_OK;
 506 }
 507
 508 HRESULT SHELL32_GetFSItemAttributes(IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 509 {
 510     DWORD dwFileAttributes, dwShellAttributes;
 511
 512     if (!_ILIsFolder(pidl) && !_ILIsValue(pidl))
 513     {
 514         ERR("Got wrong type of pidl!\n");
 515         *pdwAttributes &= SFGAO_CANLINK;
 516         return S_OK;
 517     }
 518
 519     if (*pdwAttributes & ~dwSupportedAttr)
 520     {
 521         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 522         *pdwAttributes &= dwSupportedAttr;
 523     }
 524
 525     dwFileAttributes = _ILGetFileAttributes(pidl, NULL, 0);
 526
 527     /* Set common attributes */
 528     dwShellAttributes = *pdwAttributes;
 529     dwShellAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
 530                          SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
 531
 532     if (dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 533     {
 534         dwShellAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 535     }
 536     else
 537         dwShellAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 538
 539     if (dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
 540         dwShellAttributes |=  SFGAO_HIDDEN;
 541     else
 542         dwShellAttributes &= ~SFGAO_HIDDEN;
 543
 544     if (dwFileAttributes & FILE_ATTRIBUTE_READONLY)
 545         dwShellAttributes |=  SFGAO_READONLY;
 546     else
 547         dwShellAttributes &= ~SFGAO_READONLY;
 548
 549     if (SFGAO_LINK & *pdwAttributes)
 550     {
 551         char ext[MAX_PATH];
 552
 553         if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
 554         dwShellAttributes &= ~SFGAO_LINK;
 555     }
 556
 557     if (SFGAO_HASSUBFOLDER & *pdwAttributes)
 558     {
 559         CComPtr<IShellFolder> psf2;
 560         if (SUCCEEDED(psf->BindToObject(pidl, 0, IID_PPV_ARG(IShellFolder, &psf2))))
 561         {
 562             CComPtr<IEnumIDList> pEnumIL;
 563             if (SUCCEEDED(psf2->EnumObjects(0, SHCONTF_FOLDERS, &pEnumIL)))
 564             {
 565                 if (pEnumIL->Skip(1) != S_OK)
 566                     dwShellAttributes &= ~SFGAO_HASSUBFOLDER;
 567             }
 568         }
 569     }
 570
 571     *pdwAttributes &= dwShellAttributes;
 572
 573     TRACE ("-- 0x%08x\n", *pdwAttributes);
 574     return S_OK;
 575 }
 576
 577 /***********************************************************************
 578  *  SHELL32_CompareIDs
 579  */
 580 HRESULT SHELL32_CompareIDs(IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 581 {
 582     int type1,
 583         type2;
 584     char szTemp1[MAX_PATH];
 585     char szTemp2[MAX_PATH];
 586     HRESULT nReturn;
 587     LPITEMIDLIST firstpidl;
 588     LPITEMIDLIST nextpidl1;
 589     LPITEMIDLIST nextpidl2;
 590     CComPtr<IShellFolder> psf;
 591
 592     /* test for empty pidls */
 593     BOOL isEmpty1 = _ILIsDesktop(pidl1);
 594     BOOL isEmpty2 = _ILIsDesktop(pidl2);
 595
 596     if (isEmpty1 && isEmpty2)
 597         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 0);
 598     if (isEmpty1)
 599         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 600     if (isEmpty2)
 601         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 602
 603     /* test for different types. Sort order is the PT_* constant */
 604     type1 = _ILGetDataPointer(pidl1)->type;
 605     type2 = _ILGetDataPointer(pidl2)->type;
 606     if (type1 < type2)
 607         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 608     else if (type1 > type2)
 609         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 610
 611     /* test for name of pidl */
 612     _ILSimpleGetText(pidl1, szTemp1, MAX_PATH);
 613     _ILSimpleGetText(pidl2, szTemp2, MAX_PATH);
 614     nReturn = lstrcmpiA(szTemp1, szTemp2);
 615     if (nReturn < 0)
 616         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 617     else if (nReturn > 0)
 618         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 619
 620     /* test of complex pidls */
 621     firstpidl = ILCloneFirst(pidl1);
 622     nextpidl1 = ILGetNext(pidl1);
 623     nextpidl2 = ILGetNext(pidl2);
 624
 625     /* optimizing: test special cases and bind not deeper */
 626     /* the deeper shellfolder would do the same */
 627     isEmpty1 = _ILIsDesktop(nextpidl1);
 628     isEmpty2 = _ILIsDesktop(nextpidl2);
 629
 630     if (isEmpty1 && isEmpty2)
 631     {
 632         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 0);
 633     }
 634     else if (isEmpty1)
 635     {
 636         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 637     }
 638     else if (isEmpty2)
 639     {
 640         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 641         /* optimizing end */
 642     }
 643     else if (SUCCEEDED(iface->BindToObject(firstpidl, NULL, IID_PPV_ARG(IShellFolder, &psf)))) {
 644         nReturn = psf->CompareIDs(lParam, nextpidl1, nextpidl2);
 645     }
 646     ILFree(firstpidl);
 647     return nReturn;
 648 }
 649
 650 /***********************************************************************
 651  *  SHCreateLinks
 652  *
 653  *   Undocumented.
 654  */
 655 HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, IDataObject * lpDataObject,
 656                               UINT uFlags, LPITEMIDLIST *lppidlLinks)
 657 {
 658     FIXME("%p %s %p %08x %p\n", hWnd, lpszDir, lpDataObject, uFlags, lppidlLinks);
 659     return E_NOTIMPL;
 660 }
 661
 662 /***********************************************************************
 663  *  SHOpenFolderAndSelectItems
 664  *
 665  *   Unimplemented.
 666  */
 667 EXTERN_C HRESULT
 668 WINAPI
 669 SHOpenFolderAndSelectItems(LPITEMIDLIST pidlFolder,
 670                            UINT cidl,
 671                            PCUITEMID_CHILD_ARRAY apidl,
 672                            DWORD dwFlags)
 673 {
 674     FIXME("SHOpenFolderAndSelectItems() stub\n");
 675     return E_NOTIMPL;
 676 }