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 static const WCHAR wszDotShellClassInfo[] = {
  29     '.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0};
  30
  31 /***************************************************************************
  32  *  SHELL32_GetCustomFolderAttribute (internal function)
  33  *
  34  * Gets a value from the folder's desktop.ini file, if one exists.
  35  *
  36  * PARAMETERS
  37  *  pidl          [I] Folder containing the desktop.ini file.
  38  *  pwszHeading   [I] Heading in .ini file.
  39  *  pwszAttribute [I] Attribute in .ini file.
  40  *  pwszValue     [O] Buffer to store value into.
  41  *  cchValue      [I] Size in characters including NULL of buffer pointed to
  42  *                    by pwszValue.
  43  *
  44  *  RETURNS
  45  *    TRUE if returned non-NULL value.
  46  *    FALSE otherwise.
  47  */
  48 static BOOL __inline SHELL32_GetCustomFolderAttributeFromPath(
  49     LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  50     LPWSTR pwszValue, DWORD cchValue)
  51 {
  52     static const WCHAR wszDesktopIni[] =
  53             {'d','e','s','k','t','o','p','.','i','n','i',0};
  54     static const WCHAR wszDefault[] = {0};
  55
  56     PathAddBackslashW(pwszFolderPath);
  57     PathAppendW(pwszFolderPath, wszDesktopIni);
  58     return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
  59                                     pwszValue, cchValue, pwszFolderPath);
  60 }
  61
  62 BOOL SHELL32_GetCustomFolderAttribute(
  63     LPCITEMIDLIST pidl, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  64     LPWSTR pwszValue, DWORD cchValue)
  65 {
  66     DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
  67     WCHAR wszFolderPath[MAX_PATH];
  68
  69     /* Hack around not having system attribute on non-Windows file systems */
  70     if (0)
  71         dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
  72
  73     if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
  74     {
  75         if (!SHGetPathFromIDListW(pidl, wszFolderPath))
  76             return FALSE;
  77
  78         return SHELL32_GetCustomFolderAttributeFromPath(wszFolderPath, pwszHeading,
  79                                                 pwszAttribute, pwszValue, cchValue);
  80     }
  81     return FALSE;
  82 }
  83
  84 BOOL SHELL32_GetCustomFolderAttributes(
  85     LPCITEMIDLIST pidl, LPCWSTR pwszHeading,
  86     LPWSTR pwszValue, DWORD cchValue)
  87 {
  88     DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
  89     WCHAR wszFolderPath[MAX_PATH];
  90
  91     /* Hack around not having system attribute on non-Windows file systems */
  92     if (0)
  93         dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
  94
  95     if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
  96     {
  97         if (!SHGetPathFromIDListW(pidl, wszFolderPath))
  98             return FALSE;
  99
 100         static const WCHAR wszDesktopIni[] =
 101                 {'d','e','s','k','t','o','p','.','i','n','i',0};
 102
 103         PathAddBackslashW(wszFolderPath);
 104         PathAppendW(wszFolderPath, wszDesktopIni);
 105         return GetPrivateProfileSectionW(pwszHeading, pwszValue, cchValue, wszFolderPath);
 106     }
 107     return FALSE;
 108 }
 109
 110
 111 /***************************************************************************
 112  *  GetNextElement (internal function)
 113  *
 114  * Gets a part of a string till the first backslash.
 115  *
 116  * PARAMETERS
 117  *  pszNext [IN] string to get the element from
 118  *  pszOut  [IN] pointer to buffer which receives string
 119  *  dwOut   [IN] length of pszOut
 120  *
 121  *  RETURNS
 122  *    LPSTR pointer to first, not yet parsed char
 123  */
 124
 125 LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
 126 {
 127     LPCWSTR pszTail = pszNext;
 128     DWORD dwCopy;
 129
 130     TRACE ("(%s %p 0x%08x)\n", debugstr_w (pszNext), pszOut, dwOut);
 131
 132     *pszOut = 0x0000;
 133
 134     if (!pszNext || !*pszNext)
 135         return NULL;
 136
 137     while (*pszTail && (*pszTail != (WCHAR) '\\'))
 138         pszTail++;
 139
 140     dwCopy = pszTail - pszNext + 1;
 141     lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
 142
 143     if (*pszTail)
 144         pszTail++;
 145     else
 146         pszTail = NULL;
 147
 148     TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
 149     return pszTail;
 150 }
 151
 152 HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
 153                   LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
 154 {
 155     HRESULT hr = E_INVALIDARG;
 156     LPITEMIDLIST pidlIn = pidlInOut ? *pidlInOut : NULL;
 157     LPITEMIDLIST pidlOut = NULL;
 158     LPITEMIDLIST pidlTemp = NULL;
 159     CComPtr<IShellFolder> psfChild;
 160
 161     TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlIn, debugstr_w (szNext));
 162
 163     /* get the shellfolder for the child pidl and let it analyse further */
 164     hr = psf->BindToObject(pidlIn, pbc, IID_PPV_ARG(IShellFolder, &psfChild));
 165     if (FAILED(hr))
 166         return hr;
 167
 168     hr = psfChild->ParseDisplayName(hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
 169     if (FAILED(hr))
 170         return hr;
 171
 172     pidlTemp = ILCombine (pidlIn, pidlOut);
 173     if (!pidlTemp)
 174     {
 175         hr = E_OUTOFMEMORY;
 176         if (pidlOut)
 177             ILFree(pidlOut);
 178         return hr;
 179     }
 180
 181     if (pidlOut)
 182         ILFree (pidlOut);
 183
 184     if (pidlIn)
 185         ILFree (pidlIn);
 186
 187     *pidlInOut = pidlTemp;
 188
 189     TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
 190     return S_OK;
 191 }
 192
 193 /***********************************************************************
 194  *    SHELL32_CoCreateInitSF
 195  *
 196  * Creates a shell folder and initializes it with a pidl and a root folder
 197  * via IPersistFolder3 or IPersistFolder.
 198  *
 199  * NOTES
 200  *   pathRoot can be NULL for Folders being a drive.
 201  *   In this case the absolute path is built from pidlChild (eg. C:)
 202  */
 203 static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
 204                 LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
 205 {
 206     HRESULT hr;
 207     CComPtr<IShellFolder> pShellFolder;
 208
 209     TRACE ("%p %s %p\n", pidlRoot, debugstr_w(pathRoot), pidlChild);
 210
 211     hr = SHCoCreateInstance(NULL, &clsid, NULL, IID_PPV_ARG(IShellFolder, &pShellFolder));
 212     if (SUCCEEDED (hr))
 213     {
 214         LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
 215         CComPtr<IPersistFolder> ppf;
 216         CComPtr<IPersistFolder3> ppf3;
 217
 218         if (_ILIsFolder(pidlChild) &&
 219             SUCCEEDED(pShellFolder->QueryInterface(IID_PPV_ARG(IPersistFolder3, &ppf3))))
 220         {
 221             PERSIST_FOLDER_TARGET_INFO ppfti;
 222
 223             ZeroMemory (&ppfti, sizeof (ppfti));
 224
 225             /* fill the PERSIST_FOLDER_TARGET_INFO */
 226             ppfti.dwAttributes = -1;
 227             ppfti.csidl = -1;
 228
 229             /* build path */
 230             if (pathRoot)
 231             {
 232                 lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
 233                 PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
 234             }
 235
 236             if (pidlChild)
 237             {
 238                 int len = wcslen(ppfti.szTargetParsingName);
 239
 240                 if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
 241                     hr = E_INVALIDARG;
 242             }
 243
 244             ppf3->InitializeEx(NULL, pidlAbsolute, &ppfti);
 245         }
 246         else if (SUCCEEDED((hr = pShellFolder->QueryInterface(IID_PPV_ARG(IPersistFolder, &ppf)))))
 247         {
 248             ppf->Initialize(pidlAbsolute);
 249         }
 250         ILFree (pidlAbsolute);
 251     }
 252
 253     *ppvOut = pShellFolder.Detach();
 254
 255     TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
 256
 257     return hr;
 258 }
 259
 260 /***********************************************************************
 261  *    SHELL32_BindToChild [Internal]
 262  *
 263  * Common code for IShellFolder_BindToObject.
 264  *
 265  * PARAMS
 266  *  pidlRoot     [I] The parent shell folder's absolute pidl.
 267  *  pathRoot     [I] Absolute dos path of the parent shell folder.
 268  *  pidlComplete [I] PIDL of the child. Relative to pidlRoot.
 269  *  riid         [I] GUID of the interface, which ppvOut shall be bound to.
 270  *  ppvOut       [O] A reference to the child's interface (riid).
 271  *
 272  * NOTES
 273  *  pidlComplete has to contain at least one non empty SHITEMID.
 274  *  This function makes special assumptions on the shell namespace, which
 275  *  means you probably can't use it for your IShellFolder implementation.
 276  */
 277 HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
 278                              LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
 279 {
 280     GUID const *clsid;
 281     CComPtr<IShellFolder> pSF;
 282     HRESULT hr;
 283     LPITEMIDLIST pidlChild;
 284
 285     if (!pidlRoot || !ppvOut || !pidlComplete || !pidlComplete->mkid.cb)
 286         return E_INVALIDARG;
 287
 288     *ppvOut = NULL;
 289
 290     pidlChild = ILCloneFirst (pidlComplete);
 291
 292     if ((clsid = _ILGetGUIDPointer (pidlChild))) {
 293         /* virtual folder */
 294         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, *clsid, (LPVOID *)&pSF);
 295     } else {
 296         /* file system folder */
 297         CLSID clsidFolder = CLSID_ShellFSFolder;
 298         static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
 299         WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
 300
 301         /* see if folder CLSID should be overridden by desktop.ini file */
 302         if (pathRoot) {
 303             lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
 304             pwszPathTail = PathAddBackslashW(wszFolderPath);
 305         }
 306
 307         _ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
 308
 309         if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
 310             wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
 311             CLSIDFromString (wszCLSIDValue, &clsidFolder);
 312
 313         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
 314                                      clsidFolder, (LPVOID *)&pSF);
 315     }
 316     ILFree (pidlChild);
 317
 318     if (SUCCEEDED (hr)) {
 319         if (_ILIsPidlSimple (pidlComplete)) {
 320             /* no sub folders */
 321             hr = pSF->QueryInterface(riid, ppvOut);
 322         } else {
 323             /* go deeper */
 324             hr = pSF->BindToObject(ILGetNext (pidlComplete), NULL, riid, ppvOut);
 325         }
 326     }
 327
 328     TRACE ("-- returning (%p) %08x\n", *ppvOut, hr);
 329
 330     return hr;
 331 }
 332
 333 /***********************************************************************
 334  *    SHELL32_GetDisplayNameOfChild
 335  *
 336  * Retrieves the display name of a child object of a shellfolder.
 337  *
 338  * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 339  * - it binds to the child shellfolder [subpidl1]
 340  * - asks it for the displayname of [subpidl2][subpidl3]
 341  *
 342  * Is possible the pidl is a simple pidl. In this case it asks the
 343  * subfolder for the displayname of an empty pidl. The subfolder
 344  * returns the own displayname eg. "::{guid}". This is used for
 345  * virtual folders with the registry key WantsFORPARSING set.
 346  */
 347 HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 348                        LPCITEMIDLIST pidl, DWORD dwFlags, LPWSTR szOut, DWORD dwOutLen)
 349 {
 350     LPITEMIDLIST pidlFirst;
 351     HRESULT hr = E_INVALIDARG;
 352
 353     TRACE ("(%p)->(pidl=%p 0x%08x %p 0x%08x)\n", psf, pidl, dwFlags, szOut, dwOutLen);
 354     pdump (pidl);
 355
 356     pidlFirst = ILCloneFirst(pidl);
 357     if (pidlFirst)
 358     {
 359         CComPtr<IShellFolder> psfChild;
 360
 361         hr = psf->BindToObject(pidlFirst, NULL, IID_PPV_ARG(IShellFolder, &psfChild));
 362         if (SUCCEEDED (hr))
 363         {
 364             STRRET strTemp;
 365             LPITEMIDLIST pidlNext = ILGetNext (pidl);
 366
 367             hr = psfChild->GetDisplayNameOf(pidlNext, dwFlags, &strTemp);
 368             if (SUCCEEDED (hr))
 369             {
 370                 if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
 371                     hr = E_FAIL;
 372             }
 373         }
 374         ILFree (pidlFirst);
 375     } else
 376         hr = E_OUTOFMEMORY;
 377
 378     TRACE ("-- ret=0x%08x %s\n", hr, debugstr_w(szOut));
 379
 380     return hr;
 381 }
 382
 383 /***********************************************************************
 384  *  SHELL32_GetItemAttributes
 385  *
 386  * NOTES
 387  * Observed values:
 388  *  folder:    0xE0000177    FILESYSTEM | HASSUBFOLDER | FOLDER
 389  *  file:    0x40000177    FILESYSTEM
 390  *  drive:    0xf0000144    FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 391  *  mycomputer:    0xb0000154    HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 392  *  (seems to be default for shell extensions if no registry entry exists)
 393  *
 394  * win2k:
 395  *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 396  *  file:      0x40400177      FILESYSTEM | CANMONIKER
 397  *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 398  *
 399  * According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
 400  * However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
 401  */
 402 HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 403 {
 404     DWORD dwAttributes;
 405     BOOL has_guid;
 406     static const DWORD dwSupportedAttr=
 407                           SFGAO_CANCOPY |           /*0x00000001 */
 408                           SFGAO_CANMOVE |           /*0x00000002 */
 409                           SFGAO_CANLINK |           /*0x00000004 */
 410                           SFGAO_CANRENAME |         /*0x00000010 */
 411                           SFGAO_CANDELETE |         /*0x00000020 */
 412                           SFGAO_HASPROPSHEET |      /*0x00000040 */
 413                           SFGAO_DROPTARGET |        /*0x00000100 */
 414                           SFGAO_LINK |              /*0x00010000 */
 415                           SFGAO_READONLY |          /*0x00040000 */
 416                           SFGAO_HIDDEN |            /*0x00080000 */
 417                           SFGAO_FILESYSANCESTOR |   /*0x10000000 */
 418                           SFGAO_FOLDER |            /*0x20000000 */
 419                           SFGAO_FILESYSTEM |        /*0x40000000 */
 420                           SFGAO_HASSUBFOLDER;       /*0x80000000 */
 421
 422     TRACE ("0x%08x\n", *pdwAttributes);
 423
 424     if (*pdwAttributes & ~dwSupportedAttr)
 425     {
 426         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 427         *pdwAttributes &= dwSupportedAttr;
 428     }
 429
 430     has_guid = _ILGetGUIDPointer(pidl) != NULL;
 431
 432     dwAttributes = *pdwAttributes;
 433
 434     if (has_guid && HCR_GetFolderAttributes(pidl, &dwAttributes))
 435         *pdwAttributes = dwAttributes;
 436     else if (_ILGetDataPointer(pidl))
 437     {
 438         dwAttributes = _ILGetFileAttributes(pidl, NULL, 0);
 439
 440         if (!dwAttributes && has_guid)
 441         {
 442             WCHAR path[MAX_PATH];
 443             STRRET strret;
 444
 445             /* File attributes are not present in the internal PIDL structure, so get them from the file system. */
 446
 447             HRESULT hr = psf->GetDisplayNameOf(pidl, SHGDN_FORPARSING, &strret);
 448
 449             if (SUCCEEDED(hr))
 450             {
 451                 hr = StrRetToBufW(&strret, pidl, path, MAX_PATH);
 452
 453                 /* call GetFileAttributes() only for file system paths, not for parsing names like "::{...}" */
 454                 if (SUCCEEDED(hr) && path[0]!=':')
 455                     dwAttributes = GetFileAttributesW(path);
 456             }
 457         }
 458
 459         /* Set common attributes */
 460         *pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
 461                           SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
 462
 463         if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
 464         {
 465             *pdwAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 466         }
 467         else
 468             *pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 469
 470         if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
 471             *pdwAttributes |=  SFGAO_HIDDEN;
 472         else
 473             *pdwAttributes &= ~SFGAO_HIDDEN;
 474
 475         if (dwAttributes & FILE_ATTRIBUTE_READONLY)
 476             *pdwAttributes |=  SFGAO_READONLY;
 477         else
 478             *pdwAttributes &= ~SFGAO_READONLY;
 479
 480         if (SFGAO_LINK & *pdwAttributes)
 481         {
 482             char ext[MAX_PATH];
 483
 484             if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
 485             *pdwAttributes &= ~SFGAO_LINK;
 486         }
 487
 488         if (SFGAO_HASSUBFOLDER & *pdwAttributes)
 489         {
 490             CComPtr<IShellFolder> psf2;
 491             if (SUCCEEDED(psf->BindToObject(pidl, 0, IID_PPV_ARG(IShellFolder, &psf2))))
 492             {
 493                 CComPtr<IEnumIDList> pEnumIL;
 494                 if (SUCCEEDED(psf2->EnumObjects(0, SHCONTF_FOLDERS, &pEnumIL)))
 495                 {
 496                     if (pEnumIL->Skip(1) != S_OK)
 497                         *pdwAttributes &= ~SFGAO_HASSUBFOLDER;
 498                 }
 499             }
 500         }
 501     } else
 502         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
 503
 504     TRACE ("-- 0x%08x\n", *pdwAttributes);
 505     return S_OK;
 506 }
 507
 508 /***********************************************************************
 509  *  SHELL32_CompareIDs
 510  */
 511 HRESULT SHELL32_CompareIDs(IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 512 {
 513     int type1,
 514         type2;
 515     char szTemp1[MAX_PATH];
 516     char szTemp2[MAX_PATH];
 517     HRESULT nReturn;
 518     LPITEMIDLIST firstpidl;
 519     LPITEMIDLIST nextpidl1;
 520     LPITEMIDLIST nextpidl2;
 521     CComPtr<IShellFolder> psf;
 522
 523     /* test for empty pidls */
 524     BOOL isEmpty1 = _ILIsDesktop(pidl1);
 525     BOOL isEmpty2 = _ILIsDesktop(pidl2);
 526
 527     if (isEmpty1 && isEmpty2)
 528         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 0);
 529     if (isEmpty1)
 530         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 531     if (isEmpty2)
 532         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 533
 534     /* test for different types. Sort order is the PT_* constant */
 535     type1 = _ILGetDataPointer(pidl1)->type;
 536     type2 = _ILGetDataPointer(pidl2)->type;
 537     if (type1 < type2)
 538         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 539     else if (type1 > type2)
 540         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 541
 542     /* test for name of pidl */
 543     _ILSimpleGetText(pidl1, szTemp1, MAX_PATH);
 544     _ILSimpleGetText(pidl2, szTemp2, MAX_PATH);
 545     nReturn = lstrcmpiA(szTemp1, szTemp2);
 546     if (nReturn < 0)
 547         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 548     else if (nReturn > 0)
 549         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 550
 551     /* test of complex pidls */
 552     firstpidl = ILCloneFirst(pidl1);
 553     nextpidl1 = ILGetNext(pidl1);
 554     nextpidl2 = ILGetNext(pidl2);
 555
 556     /* optimizing: test special cases and bind not deeper */
 557     /* the deeper shellfolder would do the same */
 558     isEmpty1 = _ILIsDesktop(nextpidl1);
 559     isEmpty2 = _ILIsDesktop(nextpidl2);
 560
 561     if (isEmpty1 && isEmpty2)
 562     {
 563         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 0);
 564     }
 565     else if (isEmpty1)
 566     {
 567         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, (WORD) -1);
 568     }
 569     else if (isEmpty2)
 570     {
 571         return MAKE_HRESULT(SEVERITY_SUCCESS, 0, 1);
 572         /* optimizing end */
 573     }
 574     else if (SUCCEEDED(iface->BindToObject(firstpidl, NULL, IID_PPV_ARG(IShellFolder, &psf)))) {
 575         nReturn = psf->CompareIDs(lParam, nextpidl1, nextpidl2);
 576     }
 577     ILFree(firstpidl);
 578     return nReturn;
 579 }
 580
 581 /***********************************************************************
 582  *  SHCreateLinks
 583  *
 584  *   Undocumented.
 585  */
 586 HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, IDataObject * lpDataObject,
 587                               UINT uFlags, LPITEMIDLIST *lppidlLinks)
 588 {
 589     FIXME("%p %s %p %08x %p\n", hWnd, lpszDir, lpDataObject, uFlags, lppidlLinks);
 590     return E_NOTIMPL;
 591 }
 592
 593 /***********************************************************************
 594  *  SHOpenFolderAndSelectItems
 595  *
 596  *   Unimplemented.
 597  */
 598 EXTERN_C HRESULT
 599 WINAPI
 600 SHOpenFolderAndSelectItems(LPITEMIDLIST pidlFolder,
 601                            UINT cidl,
 602                            PCUITEMID_CHILD_ARRAY apidl,
 603                            DWORD dwFlags)
 604 {
 605     FIXME("SHOpenFolderAndSelectItems() stub\n");
 606     return E_NOTIMPL;
 607 }