dlls/shell32/shlfolder.c

   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 "config.h"
  25 #include "wine/port.h"
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #define COBJMACROS
  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 "shlwapi.h"
  48 #include "wine/debug.h"
  49 #include "shfldr.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  52
  53 static CRITICAL_SECTION SHELL32_SF_ClassCacheCS;
  54 static CRITICAL_SECTION_DEBUG critsect_debug =
  55 {
  56     0, 0, &SHELL32_SF_ClassCacheCS,
  57     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  58       0, 0, { (DWORD_PTR)(__FILE__ ": SHELL32_SF_ClassCacheCS") }
  59 };
  60 static CRITICAL_SECTION SHELL32_SF_ClassCacheCS = { &critsect_debug, -1, 0, 0, 0, 0 };
  61
  62 /* IShellFolder class cache */
  63 struct _sf_cls_cache_entry
  64 {
  65     CLSID clsid;
  66     LPVOID pv;
  67 };
  68
  69 static struct _sf_class_cache
  70 {
  71     DWORD allocated, used;
  72     struct _sf_cls_cache_entry *sf_cls_cache_entry;
  73 } sf_cls_cache;
  74
  75 static const WCHAR wszDotShellClassInfo[] = {
  76     '.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0};
  77
  78 /***************************************************************************
  79  *  SHELL32_GetCustomFolderAttribute (internal function)
  80  *
  81  * Gets a value from the folder's desktop.ini file, if one exists.
  82  *
  83  * PARAMETERS
  84  *  pidl          [I] Folder containing the desktop.ini file.
  85  *  pwszHeading   [I] Heading in .ini file.
  86  *  pwszAttribute [I] Attribute in .ini file.
  87  *  pwszValue     [O] Buffer to store value into.
  88  *  cchValue      [I] Size in characters including NULL of buffer pointed to
  89  *                    by pwszValue.
  90  *
  91  *  RETURNS
  92  *    TRUE if returned non-NULL value.
  93  *    FALSE otherwise.
  94  */
  95 static inline BOOL SHELL32_GetCustomFolderAttributeFromPath(
  96     LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  97     LPWSTR pwszValue, DWORD cchValue)
  98 {
  99     static const WCHAR wszDesktopIni[] =
 100             {'d','e','s','k','t','o','p','.','i','n','i',0};
 101     static const WCHAR wszDefault[] = {0};
 102
 103     PathAddBackslashW(pwszFolderPath);
 104     PathAppendW(pwszFolderPath, wszDesktopIni);
 105     return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
 106                                     pwszValue, cchValue, pwszFolderPath);
 107 }
 108
 109 BOOL SHELL32_GetCustomFolderAttribute(
 110     LPCITEMIDLIST pidl, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
 111     LPWSTR pwszValue, DWORD cchValue)
 112 {
 113     DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
 114     WCHAR wszFolderPath[MAX_PATH];
 115
 116     /* Hack around not having system attribute on non-Windows file systems */
 117     if (0)
 118         dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
 119
 120     if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
 121     {
 122         if (!SHGetPathFromIDListW(pidl, wszFolderPath))
 123             return FALSE;
 124
 125         return SHELL32_GetCustomFolderAttributeFromPath(wszFolderPath, pwszHeading,
 126                                                 pwszAttribute, pwszValue, cchValue);
 127     }
 128     return FALSE;
 129 }
 130
 131 /***************************************************************************
 132  *  GetNextElement (internal function)
 133  *
 134  * Gets a part of a string till the first backslash.
 135  *
 136  * PARAMETERS
 137  *  pszNext [IN] string to get the element from
 138  *  pszOut  [IN] pointer to buffer whitch receives string
 139  *  dwOut   [IN] length of pszOut
 140  *
 141  *  RETURNS
 142  *    LPSTR pointer to first, not yet parsed char
 143  */
 144
 145 LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
 146 {
 147     LPCWSTR pszTail = pszNext;
 148     DWORD dwCopy;
 149
 150     TRACE ("(%s %p 0x%08x)\n", debugstr_w (pszNext), pszOut, dwOut);
 151
 152     *pszOut = 0x0000;
 153
 154     if (!pszNext || !*pszNext)
 155         return NULL;
 156
 157     while (*pszTail && (*pszTail != (WCHAR) '\\'))
 158         pszTail++;
 159
 160     dwCopy = (const WCHAR *) pszTail - (const WCHAR *) pszNext + 1;
 161     lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
 162
 163     if (*pszTail)
 164         pszTail++;
 165     else
 166         pszTail = NULL;
 167
 168     TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
 169     return pszTail;
 170 }
 171
 172 HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
 173                                   LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
 174 {
 175     HRESULT hr = E_INVALIDARG;
 176     LPITEMIDLIST pidlOut = NULL,
 177       pidlTemp = NULL;
 178     IShellFolder *psfChild;
 179
 180     TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlInOut ? *pidlInOut : NULL, debugstr_w (szNext));
 181
 182     /* get the shellfolder for the child pidl and let it analyse further */
 183     hr = IShellFolder_BindToObject (psf, *pidlInOut, pbc, &IID_IShellFolder, (LPVOID *) & psfChild);
 184
 185     if (SUCCEEDED(hr)) {
 186         hr = IShellFolder_ParseDisplayName (psfChild, hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
 187         IShellFolder_Release (psfChild);
 188
 189         if (SUCCEEDED(hr)) {
 190             pidlTemp = ILCombine (*pidlInOut, pidlOut);
 191
 192             if (!pidlTemp)
 193                 hr = E_OUTOFMEMORY;
 194         }
 195
 196         if (pidlOut)
 197             ILFree (pidlOut);
 198     }
 199
 200     ILFree (*pidlInOut);
 201     *pidlInOut = pidlTemp;
 202
 203     TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
 204     return hr;
 205 }
 206
 207 static BOOL get_iface_from_cache(REFCLSID clsid, LPVOID *ppvOut)
 208 {
 209     BOOL ret = FALSE;
 210     int i;
 211
 212     EnterCriticalSection(&SHELL32_SF_ClassCacheCS);
 213
 214     for (i = 0; i < sf_cls_cache.used; i++)
 215     {
 216         if (IsEqualIID(&sf_cls_cache.sf_cls_cache_entry[i].clsid, clsid))
 217         {
 218             *ppvOut = sf_cls_cache.sf_cls_cache_entry[i].pv;
 219             /* Pin it */
 220             IUnknown_AddRef((IUnknown *)*ppvOut);
 221             ret = TRUE;
 222             break;
 223         }
 224     }
 225
 226     LeaveCriticalSection(&SHELL32_SF_ClassCacheCS);
 227     return ret;
 228 }
 229
 230 static void add_iface_to_cache(REFCLSID clsid, LPVOID pv)
 231 {
 232     EnterCriticalSection(&SHELL32_SF_ClassCacheCS);
 233
 234     if (sf_cls_cache.used >= sf_cls_cache.allocated)
 235     {
 236         DWORD allocated;
 237         struct _sf_cls_cache_entry *sf_cls_cache_entry;
 238
 239         if (!sf_cls_cache.allocated)
 240         {
 241             allocated = 4;
 242             sf_cls_cache_entry = HeapAlloc(GetProcessHeap(), 0,
 243                                            4 * sizeof(*sf_cls_cache_entry));
 244         }
 245         else
 246         {
 247             allocated = sf_cls_cache.allocated * 2;
 248             sf_cls_cache_entry = HeapReAlloc(GetProcessHeap(), 0, sf_cls_cache.sf_cls_cache_entry,
 249                                              allocated * sizeof(*sf_cls_cache_entry));
 250         }
 251         if (!sf_cls_cache_entry)
 252         {
 253             LeaveCriticalSection(&SHELL32_SF_ClassCacheCS);
 254             return;
 255         }
 256
 257         sf_cls_cache.allocated = allocated;
 258         sf_cls_cache.sf_cls_cache_entry = sf_cls_cache_entry;
 259     }
 260
 261     /* Pin it */
 262     IUnknown_AddRef((IUnknown *)pv);
 263
 264     sf_cls_cache.sf_cls_cache_entry[sf_cls_cache.used].clsid = *clsid;
 265     sf_cls_cache.sf_cls_cache_entry[sf_cls_cache.used].pv = pv;
 266     sf_cls_cache.used++;
 267
 268     LeaveCriticalSection(&SHELL32_SF_ClassCacheCS);
 269 }
 270
 271 /***********************************************************************
 272  *      SHELL32_CoCreateInitSF
 273  *
 274  * Creates a shell folder and initializes it with a pidl and a root folder
 275  * via IPersistFolder3 or IPersistFolder.
 276  *
 277  * NOTES
 278  *   pathRoot can be NULL for Folders being a drive.
 279  *   In this case the absolute path is built from pidlChild (eg. C:)
 280  */
 281 static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
 282                 LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
 283 {
 284     HRESULT hr = S_OK;
 285
 286     TRACE ("%p %s %p\n", pidlRoot, debugstr_w(pathRoot), pidlChild);
 287
 288     if (!get_iface_from_cache(clsid, ppvOut))
 289     {
 290         hr = SHCoCreateInstance(NULL, clsid, NULL, &IID_IShellFolder, ppvOut);
 291         if (SUCCEEDED(hr))
 292         {
 293             TRACE("loaded %p %s\n", *ppvOut, wine_dbgstr_guid(clsid));
 294             add_iface_to_cache(clsid, *ppvOut);
 295         }
 296     }
 297     else
 298         TRACE("found in the cache %p %s\n", *ppvOut, wine_dbgstr_guid(clsid));
 299
 300     if (SUCCEEDED (hr))
 301     {
 302         LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
 303         IPersistFolder *pPF;
 304         IPersistFolder3 *ppf;
 305
 306         if (_ILIsFolder(pidlChild) &&
 307             SUCCEEDED (IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder3, (LPVOID *) & ppf)))
 308         {
 309             PERSIST_FOLDER_TARGET_INFO ppfti;
 310
 311             ZeroMemory (&ppfti, sizeof (ppfti));
 312
 313             /* fill the PERSIST_FOLDER_TARGET_INFO */
 314             ppfti.dwAttributes = -1;
 315             ppfti.csidl = -1;
 316
 317             /* build path */
 318             if (pathRoot) {
 319                 lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
 320                 PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
 321             }
 322
 323             if (pidlChild) {
 324                 int len = lstrlenW(ppfti.szTargetParsingName);
 325
 326                 if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
 327                         hr = E_INVALIDARG;
 328             }
 329
 330             IPersistFolder3_InitializeEx (ppf, NULL, pidlAbsolute, &ppfti);
 331             IPersistFolder3_Release (ppf);
 332         }
 333         else if (SUCCEEDED ((hr = IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder, (LPVOID *) & pPF)))) {
 334             IPersistFolder_Initialize (pPF, pidlAbsolute);
 335             IPersistFolder_Release (pPF);
 336         }
 337         ILFree (pidlAbsolute);
 338     }
 339     TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
 340     return hr;
 341 }
 342
 343 /***********************************************************************
 344  *      SHELL32_BindToChild [Internal]
 345  *
 346  * Common code for IShellFolder_BindToObject.
 347  *
 348  * PARAMS
 349  *  pidlRoot     [I] The parent shell folder's absolute pidl.
 350  *  pathRoot     [I] Absolute dos path of the parent shell folder.
 351  *  pidlComplete [I] PIDL of the child. Relative to pidlRoot.
 352  *  riid         [I] GUID of the interface, which ppvOut shall be bound to.
 353  *  ppvOut       [O] A reference to the child's interface (riid).
 354  *
 355  * NOTES
 356  *  pidlComplete has to contain at least one non empty SHITEMID.
 357  *  This function makes special assumptions on the shell namespace, which
 358  *  means you probably can't use it for your IShellFolder implementation.
 359  */
 360 HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
 361                              LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
 362 {
 363     GUID const *clsid;
 364     IShellFolder *pSF;
 365     HRESULT hr;
 366     LPITEMIDLIST pidlChild;
 367
 368     if (!pidlRoot || !ppvOut || !pidlComplete || !pidlComplete->mkid.cb)
 369         return E_INVALIDARG;
 370
 371     *ppvOut = NULL;
 372
 373     pidlChild = ILCloneFirst (pidlComplete);
 374
 375     if ((clsid = _ILGetGUIDPointer (pidlChild))) {
 376         /* virtual folder */
 377         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, clsid, (LPVOID *)&pSF);
 378     } else {
 379         /* file system folder */
 380         CLSID clsidFolder = CLSID_ShellFSFolder;
 381         static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
 382         WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
 383
 384         /* see if folder CLSID should be overridden by desktop.ini file */
 385         if (pathRoot) {
 386             lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
 387             pwszPathTail = PathAddBackslashW(wszFolderPath);
 388         }
 389
 390         _ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
 391
 392         if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
 393             wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
 394             CLSIDFromString (wszCLSIDValue, &clsidFolder);
 395
 396         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
 397                                      &clsidFolder, (LPVOID *)&pSF);
 398     }
 399     ILFree (pidlChild);
 400
 401     if (SUCCEEDED (hr)) {
 402         if (_ILIsPidlSimple (pidlComplete)) {
 403             /* no sub folders */
 404             hr = IShellFolder_QueryInterface (pSF, riid, ppvOut);
 405         } else {
 406             /* go deeper */
 407             hr = IShellFolder_BindToObject (pSF, ILGetNext (pidlComplete), NULL, riid, ppvOut);
 408         }
 409         IShellFolder_Release (pSF);
 410     }
 411
 412     TRACE ("-- returning (%p) %08x\n", *ppvOut, hr);
 413
 414     return hr;
 415 }
 416
 417 /***********************************************************************
 418  *      SHELL32_GetDisplayNameOfChild
 419  *
 420  * Retrieves the display name of a child object of a shellfolder.
 421  *
 422  * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 423  * - it binds to the child shellfolder [subpidl1]
 424  * - asks it for the displayname of [subpidl2][subpidl3]
 425  *
 426  * Is possible the pidl is a simple pidl. In this case it asks the
 427  * subfolder for the displayname of an empty pidl. The subfolder
 428  * returns the own displayname eg. "::{guid}". This is used for
 429  * virtual folders with the registry key WantsFORPARSING set.
 430  */
 431 HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 432                                        LPCITEMIDLIST pidl, DWORD dwFlags, LPWSTR szOut, DWORD dwOutLen)
 433 {
 434     LPITEMIDLIST pidlFirst;
 435     HRESULT hr = E_INVALIDARG;
 436
 437     TRACE ("(%p)->(pidl=%p 0x%08x %p 0x%08x)\n", psf, pidl, dwFlags, szOut, dwOutLen);
 438     pdump (pidl);
 439
 440     pidlFirst = ILCloneFirst (pidl);
 441     if (pidlFirst) {
 442         IShellFolder2 *psfChild;
 443
 444         hr = IShellFolder_BindToObject (psf, pidlFirst, NULL, &IID_IShellFolder, (LPVOID *) & psfChild);
 445         if (SUCCEEDED (hr)) {
 446             STRRET strTemp;
 447             LPITEMIDLIST pidlNext = ILGetNext (pidl);
 448
 449             hr = IShellFolder_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
 450             if (SUCCEEDED (hr)) {
 451                 if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
 452                     hr = E_FAIL;
 453             }
 454             IShellFolder_Release (psfChild);
 455         }
 456         ILFree (pidlFirst);
 457     } else
 458         hr = E_OUTOFMEMORY;
 459
 460     TRACE ("-- ret=0x%08x %s\n", hr, debugstr_w(szOut));
 461
 462     return hr;
 463 }
 464
 465 /***********************************************************************
 466  *  SHELL32_GetItemAttributes
 467  *
 468  * NOTES
 469  * Observed values:
 470  *  folder:     0xE0000177      FILESYSTEM | HASSUBFOLDER | FOLDER
 471  *  file:       0x40000177      FILESYSTEM
 472  *  drive:      0xf0000144      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 473  *  mycomputer: 0xb0000154      HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 474  *  (seems to be default for shell extensions if no registry entry exists)
 475  *
 476  * win2k:
 477  *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 478  *  file:      0x40400177      FILESYSTEM | CANMONIKER
 479  *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 480  *
 481  * According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
 482  * However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
 483  */
 484 HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 485 {
 486     DWORD dwAttributes;
 487     BOOL has_guid;
 488     static const DWORD dwSupportedAttr=
 489                           SFGAO_CANCOPY |           /*0x00000001 */
 490                           SFGAO_CANMOVE |           /*0x00000002 */
 491                           SFGAO_CANLINK |           /*0x00000004 */
 492                           SFGAO_CANRENAME |         /*0x00000010 */
 493                           SFGAO_CANDELETE |         /*0x00000020 */
 494                           SFGAO_HASPROPSHEET |      /*0x00000040 */
 495                           SFGAO_DROPTARGET |        /*0x00000100 */
 496                           SFGAO_LINK |              /*0x00010000 */
 497                           SFGAO_READONLY |          /*0x00040000 */
 498                           SFGAO_HIDDEN |            /*0x00080000 */
 499                           SFGAO_FILESYSANCESTOR |   /*0x10000000 */
 500                           SFGAO_FOLDER |            /*0x20000000 */
 501                           SFGAO_FILESYSTEM |        /*0x40000000 */
 502                           SFGAO_HASSUBFOLDER;       /*0x80000000 */
 503
 504     TRACE ("0x%08x\n", *pdwAttributes);
 505
 506     if (*pdwAttributes & ~dwSupportedAttr)
 507     {
 508         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 509         *pdwAttributes &= dwSupportedAttr;
 510     }
 511
 512     has_guid = _ILGetGUIDPointer(pidl) != NULL;
 513
 514     dwAttributes = *pdwAttributes;
 515
 516     if (_ILIsDrive (pidl)) {
 517         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FILESYSTEM|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|
 518             SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANLINK;
 519     } else if (has_guid && HCR_GetFolderAttributes(pidl, &dwAttributes)) {
 520         *pdwAttributes = dwAttributes;
 521     } else if (_ILGetDataPointer (pidl)) {
 522         dwAttributes = _ILGetFileAttributes (pidl, NULL, 0);
 523
 524         if (!dwAttributes && has_guid) {
 525             WCHAR path[MAX_PATH];
 526             STRRET strret;
 527
 528             /* File attributes are not present in the internal PIDL structure, so get them from the file system. */
 529
 530             HRESULT hr = IShellFolder_GetDisplayNameOf(psf, pidl, SHGDN_FORPARSING, &strret);
 531
 532             if (SUCCEEDED(hr)) {
 533                 hr = StrRetToBufW(&strret, pidl, path, MAX_PATH);
 534
 535                 /* call GetFileAttributes() only for file system paths, not for parsing names like "::{...}" */
 536                 if (SUCCEEDED(hr) && path[0]!=':')
 537                     dwAttributes = GetFileAttributesW(path);
 538             }
 539         }
 540
 541         /* Set common attributes */
 542         *pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
 543                           SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
 544
 545         if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
 546             *pdwAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 547         else
 548             *pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 549
 550         if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
 551             *pdwAttributes |=  SFGAO_HIDDEN;
 552         else
 553             *pdwAttributes &= ~SFGAO_HIDDEN;
 554
 555         if (dwAttributes & FILE_ATTRIBUTE_READONLY)
 556             *pdwAttributes |=  SFGAO_READONLY;
 557         else
 558             *pdwAttributes &= ~SFGAO_READONLY;
 559
 560         if (SFGAO_LINK & *pdwAttributes) {
 561             char ext[MAX_PATH];
 562
 563             if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
 564                 *pdwAttributes &= ~SFGAO_LINK;
 565         }
 566
 567         if (SFGAO_HASSUBFOLDER & *pdwAttributes)
 568         {
 569             IShellFolder *psf2;
 570             if (SUCCEEDED(IShellFolder_BindToObject(psf, pidl, 0, (REFIID)&IID_IShellFolder, (LPVOID *)&psf2)))
 571             {
 572                 IEnumIDList     *pEnumIL = NULL;
 573                 if (SUCCEEDED(IShellFolder_EnumObjects(psf2, 0, SHCONTF_FOLDERS, &pEnumIL)))
 574                 {
 575                     if (IEnumIDList_Skip(pEnumIL, 1) != S_OK)
 576                         *pdwAttributes &= ~SFGAO_HASSUBFOLDER;
 577                     IEnumIDList_Release(pEnumIL);
 578                 }
 579                 IShellFolder_Release(psf2);
 580             }
 581         }
 582     } else {
 583         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
 584     }
 585     TRACE ("-- 0x%08x\n", *pdwAttributes);
 586     return S_OK;
 587 }
 588
 589 /***********************************************************************
 590  *  SHELL32_CompareIDs
 591  */
 592 HRESULT SHELL32_CompareIDs (IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 593 {
 594     int type1,
 595       type2;
 596     char szTemp1[MAX_PATH];
 597     char szTemp2[MAX_PATH];
 598     HRESULT nReturn;
 599     LPITEMIDLIST firstpidl,
 600       nextpidl1,
 601       nextpidl2;
 602     IShellFolder *psf;
 603
 604     /* test for empty pidls */
 605     BOOL isEmpty1 = _ILIsDesktop (pidl1);
 606     BOOL isEmpty2 = _ILIsDesktop (pidl2);
 607
 608     if (isEmpty1 && isEmpty2)
 609         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 610     if (isEmpty1)
 611         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 612     if (isEmpty2)
 613         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 614
 615     /* test for different types. Sort order is the PT_* constant */
 616     type1 = _ILGetDataPointer (pidl1)->type;
 617     type2 = _ILGetDataPointer (pidl2)->type;
 618     if (type1 < type2)
 619         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 620     else if (type1 > type2)
 621         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 622
 623     /* test for name of pidl */
 624     _ILSimpleGetText (pidl1, szTemp1, MAX_PATH);
 625     _ILSimpleGetText (pidl2, szTemp2, MAX_PATH);
 626     nReturn = lstrcmpiA (szTemp1, szTemp2);
 627     if (nReturn < 0)
 628         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 629     else if (nReturn > 0)
 630         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 631
 632     /* test of complex pidls */
 633     firstpidl = ILCloneFirst (pidl1);
 634     nextpidl1 = ILGetNext (pidl1);
 635     nextpidl2 = ILGetNext (pidl2);
 636
 637     /* optimizing: test special cases and bind not deeper */
 638     /* the deeper shellfolder would do the same */
 639     isEmpty1 = _ILIsDesktop (nextpidl1);
 640     isEmpty2 = _ILIsDesktop (nextpidl2);
 641
 642     if (isEmpty1 && isEmpty2) {
 643         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 644     } else if (isEmpty1) {
 645         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 646     } else if (isEmpty2) {
 647         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 648     /* optimizing end */
 649     } else if (SUCCEEDED (IShellFolder_BindToObject (iface, firstpidl, NULL, &IID_IShellFolder, (LPVOID *) & psf))) {
 650         nReturn = IShellFolder_CompareIDs (psf, lParam, nextpidl1, nextpidl2);
 651         IShellFolder_Release (psf);
 652     }
 653     ILFree (firstpidl);
 654     return nReturn;
 655 }
 656
 657 /***********************************************************************
 658  *  SHCreateLinks
 659  *
 660  *   Undocumented.
 661  */
 662 HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, LPDATAOBJECT lpDataObject,
 663                               UINT uFlags, LPITEMIDLIST *lppidlLinks)
 664 {
 665     FIXME("%p %s %p %08x %p\n",hWnd,lpszDir,lpDataObject,uFlags,lppidlLinks);
 666     return E_NOTIMPL;
 667 }