dlls/shell32/shfldr_desktop.c

   1
   2 /*
   3  *    Virtual Desktop Folder
   4  *
   5  *    Copyright 1997            Marcus Meissner
   6  *    Copyright 1998, 1999, 2002    Juergen Schmied
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30
  31 #define COBJMACROS
  32 #define NONAMELESSUNION
  33
  34 #include "winerror.h"
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winreg.h"
  38 #include "wingdi.h"
  39 #include "winuser.h"
  40
  41 #include "ole2.h"
  42 #include "shlguid.h"
  43
  44 #include "pidl.h"
  45 #include "undocshell.h"
  46 #include "shell32_main.h"
  47 #include "shresdef.h"
  48 #include "shlwapi.h"
  49 #include "shellfolder.h"
  50 #include "wine/debug.h"
  51 #include "debughlp.h"
  52 #include "shfldr.h"
  53
  54 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  55
  56 /* Undocumented functions from shdocvw */
  57 extern HRESULT WINAPI IEParseDisplayNameWithBCW(DWORD codepage, LPCWSTR lpszDisplayName, LPBC pbc, LPITEMIDLIST *ppidl);
  58
  59 /***********************************************************************
  60 *     Desktopfolder implementation
  61 */
  62
  63 typedef struct {
  64     IShellFolder2 IShellFolder2_iface;
  65     IPersistFolder2 IPersistFolder2_iface;
  66     LONG ref;
  67
  68     /* both paths are parsible from the desktop */
  69     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  70     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  71
  72     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  73     BOOL fAcceptFmt;        /* flag for pending Drop */
  74 } IDesktopFolderImpl;
  75
  76 static IDesktopFolderImpl *cached_sf;
  77
  78 static inline IDesktopFolderImpl *impl_from_IShellFolder2(IShellFolder2 *iface)
  79 {
  80     return CONTAINING_RECORD(iface, IDesktopFolderImpl, IShellFolder2_iface);
  81 }
  82
  83 static inline IDesktopFolderImpl *impl_from_IPersistFolder2( IPersistFolder2 *iface )
  84 {
  85     return CONTAINING_RECORD(iface, IDesktopFolderImpl, IPersistFolder2_iface);
  86 }
  87
  88 static const shvheader desktop_header[] = {
  89     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  90     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  91     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  92     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  93     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  94 };
  95
  96 #define DESKTOPSHELLVIEWCOLUMNS sizeof(desktop_header)/sizeof(shvheader)
  97
  98 /**************************************************************************
  99  *    ISF_Desktop_fnQueryInterface
 100  *
 101  */
 102 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
 103                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
 104 {
 105     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 106
 107     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 108
 109     if (!ppvObj) return E_POINTER;
 110
 111     *ppvObj = NULL;
 112
 113     if (IsEqualIID (riid, &IID_IUnknown) ||
 114         IsEqualIID (riid, &IID_IShellFolder) ||
 115         IsEqualIID (riid, &IID_IShellFolder2))
 116     {
 117         *ppvObj = &This->IShellFolder2_iface;
 118     }
 119     else if (IsEqualIID (riid, &IID_IPersist) ||
 120              IsEqualIID (riid, &IID_IPersistFolder) ||
 121              IsEqualIID (riid, &IID_IPersistFolder2))
 122     {
 123         *ppvObj = &This->IPersistFolder2_iface;
 124     }
 125
 126     if (*ppvObj)
 127     {
 128         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 129         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 130         return S_OK;
 131     }
 132     TRACE ("-- Interface: E_NOINTERFACE\n");
 133     return E_NOINTERFACE;
 134 }
 135
 136 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 137 {
 138     return 2; /* non-heap based object */
 139 }
 140
 141 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 142 {
 143     return 1; /* non-heap based object */
 144 }
 145
 146 /**************************************************************************
 147  *    ISF_Desktop_fnParseDisplayName
 148  *
 149  * NOTES
 150  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 151  *    to MyComputer
 152  */
 153 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 154                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 155                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 156 {
 157     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 158     IShellFolder *shell_folder = (IShellFolder*)iface;
 159     WCHAR szElement[MAX_PATH];
 160     LPCWSTR szNext = NULL;
 161     LPITEMIDLIST pidlTemp = NULL;
 162     PARSEDURLW urldata;
 163     HRESULT hr = S_OK;
 164     CLSID clsid;
 165
 166     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 167            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 168            pchEaten, ppidl, pdwAttributes);
 169
 170     if (!ppidl) return E_INVALIDARG;
 171     *ppidl = 0;
 172
 173     if (!lpszDisplayName) return E_INVALIDARG;
 174
 175     if (pchEaten)
 176         *pchEaten = 0;        /* strange but like the original */
 177
 178     urldata.cbSize = sizeof(urldata);
 179
 180     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 181     {
 182         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 183         TRACE ("-- element: %s\n", debugstr_w (szElement));
 184         SHCLSIDFromStringW (szElement + 2, &clsid);
 185         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 186     }
 187     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 188     {
 189         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 190         if (UNIXFS_is_rooted_at_desktop())
 191             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 192         else
 193             pidlTemp = _ILCreateMyComputer ();
 194         szNext = lpszDisplayName;
 195     }
 196     else if (PathIsUNCW(lpszDisplayName))
 197     {
 198         pidlTemp = _ILCreateNetwork();
 199         szNext = lpszDisplayName;
 200     }
 201     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 202     {
 203         *ppidl = pidlTemp;
 204         return S_OK;
 205     }
 206     else if (SUCCEEDED(ParseURLW(lpszDisplayName, &urldata)))
 207     {
 208         if (urldata.nScheme == URL_SCHEME_SHELL) /* handle shell: urls */
 209         {
 210             TRACE ("-- shell url: %s\n", debugstr_w(urldata.pszSuffix));
 211             SHCLSIDFromStringW (urldata.pszSuffix+2, &clsid);
 212             pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 213         }
 214         else
 215             return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 216     }
 217     else
 218     {
 219         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 220
 221         if (*lpszDisplayName)
 222         {
 223             if (*lpszDisplayName == '/')
 224             {
 225                 /* UNIX paths should be parsed by unixfs */
 226                 IShellFolder *unixFS;
 227                 hr = UnixFolder_Constructor(NULL, &IID_IShellFolder, (LPVOID*)&unixFS);
 228                 if (SUCCEEDED(hr))
 229                 {
 230                     hr = IShellFolder_ParseDisplayName(unixFS, NULL, NULL,
 231                             lpszDisplayName, NULL, &pidlTemp, NULL);
 232                     IShellFolder_Release(unixFS);
 233                 }
 234             }
 235             else
 236             {
 237                 /* build a complete path to create a simple pidl */
 238                 WCHAR szPath[MAX_PATH];
 239                 LPWSTR pathPtr;
 240
 241                 lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 242                 pathPtr = PathAddBackslashW(szPath);
 243                 if (pathPtr)
 244                 {
 245                     lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 246                     hr = _ILCreateFromPathW(szPath, &pidlTemp);
 247                 }
 248                 else
 249                 {
 250                     /* should never reach here, but for completeness */
 251                     hr = E_NOT_SUFFICIENT_BUFFER;
 252                 }
 253             }
 254         }
 255         else
 256             pidlTemp = _ILCreateMyComputer();
 257
 258         szNext = NULL;
 259     }
 260
 261     if (SUCCEEDED(hr) && pidlTemp)
 262     {
 263         if (szNext && *szNext)
 264         {
 265             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 266                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 267         }
 268         else
 269         {
 270             if (pdwAttributes && *pdwAttributes)
 271                 hr = SHELL32_GetItemAttributes(shell_folder, pidlTemp, pdwAttributes);
 272         }
 273     }
 274
 275     *ppidl = pidlTemp;
 276
 277     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 278
 279     return hr;
 280 }
 281
 282 /**************************************************************************
 283  *  CreateDesktopEnumList()
 284  */
 285 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 286  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 287  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 288  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 289  'a','c','e','\0' };
 290
 291 static BOOL CreateDesktopEnumList(IEnumIDListImpl *list, DWORD dwFlags)
 292 {
 293     BOOL ret = TRUE;
 294     WCHAR szPath[MAX_PATH];
 295
 296     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 297
 298     /* enumerate the root folders */
 299     if (dwFlags & SHCONTF_FOLDERS)
 300     {
 301         HKEY hkey;
 302         UINT i;
 303
 304         /* create the pidl for This item */
 305         ret = AddToEnumList(list, _ILCreateMyComputer());
 306
 307         for (i=0; i<2; i++) {
 308             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 309                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 310             {
 311                 WCHAR iid[50];
 312                 int i=0;
 313
 314                 while (ret)
 315                 {
 316                     DWORD size;
 317                     LONG r;
 318
 319                     size = sizeof (iid) / sizeof (iid[0]);
 320                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 321                     if (ERROR_SUCCESS == r)
 322                     {
 323                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 324                         i++;
 325                     }
 326                     else if (ERROR_NO_MORE_ITEMS == r)
 327                         break;
 328                     else
 329                         ret = FALSE;
 330                 }
 331                 RegCloseKey(hkey);
 332             }
 333         }
 334     }
 335
 336     /* enumerate the elements in %windir%\desktop */
 337     ret = ret && SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 338     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 339
 340     return ret;
 341 }
 342
 343 /**************************************************************************
 344  *        ISF_Desktop_fnEnumObjects
 345  */
 346 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 347                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 348 {
 349     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 350     IEnumIDListImpl *list;
 351
 352     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 353            This, hwndOwner, dwFlags, ppEnumIDList);
 354
 355     if (!(list = IEnumIDList_Constructor()))
 356         return E_OUTOFMEMORY;
 357     CreateDesktopEnumList(list, dwFlags);
 358     *ppEnumIDList = &list->IEnumIDList_iface;
 359
 360     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 361
 362     return S_OK;
 363 }
 364
 365 /**************************************************************************
 366  *        ISF_Desktop_fnBindToObject
 367  */
 368 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 369                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 370 {
 371     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 372
 373     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 374            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 375
 376     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 377 }
 378
 379 /**************************************************************************
 380  *    ISF_Desktop_fnBindToStorage
 381  */
 382 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 383                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 384 {
 385     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 386
 387     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 388            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 389
 390     *ppvOut = NULL;
 391     return E_NOTIMPL;
 392 }
 393
 394 /**************************************************************************
 395  *     ISF_Desktop_fnCompareIDs
 396  */
 397 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 *iface,
 398                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 399 {
 400     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 401     HRESULT hr;
 402
 403     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 404     hr = SHELL32_CompareIDs(iface, lParam, pidl1, pidl2);
 405     TRACE ("-- 0x%08x\n", hr);
 406     return hr;
 407 }
 408
 409 /**************************************************************************
 410  *    ISF_Desktop_fnCreateViewObject
 411  */
 412 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 413                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 414 {
 415     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 416     LPSHELLVIEW pShellView;
 417     HRESULT hr = E_INVALIDARG;
 418
 419     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 420            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 421
 422     if (!ppvOut)
 423         return E_INVALIDARG;
 424
 425     *ppvOut = NULL;
 426
 427     if (IsEqualIID (riid, &IID_IDropTarget))
 428     {
 429         WARN ("IDropTarget not implemented\n");
 430         hr = E_NOTIMPL;
 431     }
 432     else if (IsEqualIID (riid, &IID_IContextMenu))
 433     {
 434         WARN ("IContextMenu not implemented\n");
 435         hr = E_NOTIMPL;
 436     }
 437     else if (IsEqualIID (riid, &IID_IShellView))
 438     {
 439         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 440         if (pShellView)
 441         {
 442             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 443             IShellView_Release (pShellView);
 444         }
 445     }
 446     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 447     return hr;
 448 }
 449
 450 /**************************************************************************
 451  *  ISF_Desktop_fnGetAttributesOf
 452  */
 453 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 454                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 455 {
 456     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 457     IShellFolder *shell_folder = (IShellFolder*)iface;
 458
 459     static const DWORD dwDesktopAttributes =
 460         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 461         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 462     static const DWORD dwMyComputerAttributes =
 463         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 464         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 465
 466     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 467            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 468
 469     if (!rgfInOut)
 470         return E_INVALIDARG;
 471     if (cidl && !apidl)
 472         return E_INVALIDARG;
 473
 474     if (*rgfInOut == 0)
 475         *rgfInOut = ~0;
 476
 477     if(cidl == 0) {
 478         *rgfInOut &= dwDesktopAttributes;
 479     } else {
 480         while (cidl > 0 && *apidl) {
 481             pdump (*apidl);
 482             if (_ILIsDesktop(*apidl)) {
 483                 *rgfInOut &= dwDesktopAttributes;
 484             } else if (_ILIsMyComputer(*apidl)) {
 485                 *rgfInOut &= dwMyComputerAttributes;
 486             } else {
 487                 SHELL32_GetItemAttributes ( shell_folder, *apidl, rgfInOut);
 488             }
 489             apidl++;
 490             cidl--;
 491         }
 492     }
 493     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 494     *rgfInOut &= ~SFGAO_VALIDATE;
 495
 496     TRACE ("-- result=0x%08x\n", *rgfInOut);
 497
 498     return S_OK;
 499 }
 500
 501 /**************************************************************************
 502  *    ISF_Desktop_fnGetUIObjectOf
 503  *
 504  * PARAMETERS
 505  *  HWND           hwndOwner, //[in ] Parent window for any output
 506  *  UINT           cidl,      //[in ] array size
 507  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 508  *  REFIID         riid,      //[in ] Requested Interface
 509  *  UINT*          prgfInOut, //[   ] reserved
 510  *  LPVOID*        ppvObject) //[out] Resulting Interface
 511  *
 512  */
 513 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 514                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 515                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 516 {
 517     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 518
 519     LPITEMIDLIST pidl;
 520     IUnknown *pObj = NULL;
 521     HRESULT hr = E_INVALIDARG;
 522
 523     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 524        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 525
 526     if (!ppvOut)
 527         return E_INVALIDARG;
 528
 529     *ppvOut = NULL;
 530
 531     if (IsEqualIID (riid, &IID_IContextMenu))
 532     {
 533         if (cidl > 0)
 534             return ItemMenu_Constructor((IShellFolder*)iface, This->pidlRoot, apidl, cidl, riid, ppvOut);
 535         else
 536             return BackgroundMenu_Constructor((IShellFolder*)iface, TRUE, riid, ppvOut);
 537     }
 538     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 539     {
 540         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 541                                                   This->pidlRoot, apidl, cidl);
 542         hr = S_OK;
 543     }
 544     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 545     {
 546         pidl = ILCombine (This->pidlRoot, apidl[0]);
 547         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 548         SHFree (pidl);
 549         hr = S_OK;
 550     }
 551     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 552     {
 553         pidl = ILCombine (This->pidlRoot, apidl[0]);
 554         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 555         SHFree (pidl);
 556         hr = S_OK;
 557     }
 558     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 559     {
 560         hr = IShellFolder2_QueryInterface (iface,
 561                                           &IID_IDropTarget, (LPVOID *) & pObj);
 562     }
 563     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 564               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 565     {
 566         pidl = ILCombine (This->pidlRoot, apidl[0]);
 567         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, &pObj);
 568         SHFree (pidl);
 569     }
 570     else
 571         hr = E_NOINTERFACE;
 572
 573     if (SUCCEEDED(hr) && !pObj)
 574         hr = E_OUTOFMEMORY;
 575
 576     *ppvOut = pObj;
 577     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 578     return hr;
 579 }
 580
 581 /**************************************************************************
 582  *    ISF_Desktop_fnGetDisplayNameOf
 583  *
 584  * NOTES
 585  *    special case: pidl = null gives desktop-name back
 586  */
 587 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 588                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 589 {
 590     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 591     HRESULT hr = S_OK;
 592     LPWSTR pszPath;
 593
 594     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 595     pdump (pidl);
 596
 597     if (!strRet)
 598         return E_INVALIDARG;
 599
 600     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 601     if (!pszPath)
 602         return E_OUTOFMEMORY;
 603
 604     if (_ILIsDesktop (pidl))
 605     {
 606         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 607             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 608             strcpyW(pszPath, This->sPathTarget);
 609         else
 610             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 611     }
 612     else if (_ILIsPidlSimple (pidl))
 613     {
 614         GUID const *clsid;
 615
 616         if ((clsid = _ILGetGUIDPointer (pidl)))
 617         {
 618             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 619             {
 620                 BOOL bWantsForParsing;
 621
 622                 /*
 623                  * We can only get a filesystem path from a shellfolder if the
 624                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 625                  *
 626                  * Exception: The MyComputer folder doesn't have this key,
 627                  *   but any other filesystem backed folder it needs it.
 628                  */
 629                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 630                 {
 631                     bWantsForParsing = TRUE;
 632                 }
 633                 else
 634                 {
 635                     /* get the "WantsFORPARSING" flag from the registry */
 636                     static const WCHAR clsidW[] =
 637                      { 'C','L','S','I','D','\\',0 };
 638                     static const WCHAR shellfolderW[] =
 639                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 640                     static const WCHAR wantsForParsingW[] =
 641                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 642                      'g',0 };
 643                     WCHAR szRegPath[100];
 644                     LONG r;
 645
 646                     lstrcpyW (szRegPath, clsidW);
 647                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 648                     lstrcatW (szRegPath, shellfolderW);
 649                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 650                                     wantsForParsingW, NULL, NULL, NULL);
 651                     if (r == ERROR_SUCCESS)
 652                         bWantsForParsing = TRUE;
 653                     else
 654                         bWantsForParsing = FALSE;
 655                 }
 656
 657                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 658                      bWantsForParsing)
 659                 {
 660                     /*
 661                      * we need the filesystem path to the destination folder.
 662                      * Only the folder itself can know it
 663                      */
 664                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 665                                                         pszPath,
 666                                                         MAX_PATH);
 667                 }
 668                 else
 669                 {
 670                     /* parsing name like ::{...} */
 671                     pszPath[0] = ':';
 672                     pszPath[1] = ':';
 673                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 674                 }
 675             }
 676             else
 677             {
 678                 /* user friendly name */
 679                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 680             }
 681         }
 682         else
 683         {
 684             int cLen = 0;
 685
 686             /* file system folder or file rooted at the desktop */
 687             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 688                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 689             {
 690                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 691                 PathAddBackslashW(pszPath);
 692                 cLen = lstrlenW(pszPath);
 693             }
 694
 695             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 696
 697             if (!_ILIsFolder(pidl))
 698                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 699         }
 700     }
 701     else
 702     {
 703         /* a complex pidl, let the subfolder do the work */
 704         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 705                                             pszPath, MAX_PATH);
 706     }
 707
 708     if (SUCCEEDED(hr))
 709     {
 710         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 711         if (GetVersion() & 0x80000000)
 712         {
 713             strRet->uType = STRRET_CSTR;
 714             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 715                                      NULL, NULL))
 716                 strRet->u.cStr[0] = '\0';
 717             CoTaskMemFree(pszPath);
 718         }
 719         else
 720         {
 721             strRet->uType = STRRET_WSTR;
 722             strRet->u.pOleStr = pszPath;
 723         }
 724     }
 725     else
 726         CoTaskMemFree(pszPath);
 727
 728     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 729     strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 730     debugstr_w(strRet->u.pOleStr), hr);
 731     return hr;
 732 }
 733
 734 /**************************************************************************
 735  *  ISF_Desktop_fnSetNameOf
 736  *  Changes the name of a file object or subfolder, possibly changing its item
 737  *  identifier in the process.
 738  *
 739  * PARAMETERS
 740  *  HWND          hwndOwner,  //[in ] Owner window for output
 741  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 742  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 743  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 744  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 745  */
 746 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 747                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 748                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 749 {
 750     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 751
 752     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p) stub\n", This, hwndOwner, pidl,
 753            debugstr_w (lpName), dwFlags, pPidlOut);
 754
 755     return E_FAIL;
 756 }
 757
 758 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 759                 GUID * pguid)
 760 {
 761     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 762     FIXME ("(%p)->(%p) stub\n", This, pguid);
 763     return E_NOTIMPL;
 764 }
 765
 766 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 767                 IEnumExtraSearch ** ppenum)
 768 {
 769     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 770     FIXME ("(%p)->(%p) stub\n", This, ppenum);
 771     return E_NOTIMPL;
 772 }
 773
 774 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 775                 DWORD reserved, ULONG * pSort, ULONG * pDisplay)
 776 {
 777     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 778
 779     TRACE ("(%p)->(%d %p %p)\n", This, reserved, pSort, pDisplay);
 780
 781     if (pSort)
 782         *pSort = 0;
 783     if (pDisplay)
 784         *pDisplay = 0;
 785
 786     return S_OK;
 787 }
 788 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 789                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 790 {
 791     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 792
 793     TRACE ("(%p)->(%d %p)\n", This, iColumn, pcsFlags);
 794
 795     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 796     return E_INVALIDARG;
 797
 798     *pcsFlags = desktop_header[iColumn].pcsFlags;
 799
 800     return S_OK;
 801 }
 802
 803 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 804                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 805 {
 806     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 807     FIXME ("(%p)->(%p %p %p) stub\n", This, pidl, pscid, pv);
 808     return E_NOTIMPL;
 809 }
 810
 811 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 812                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 813 {
 814     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 815
 816     HRESULT hr = S_OK;
 817
 818     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 819
 820     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 821         return E_INVALIDARG;
 822
 823     if (!pidl)
 824         return SHELL32_GetColumnDetails(desktop_header, iColumn, psd);
 825
 826     /* the data from the pidl */
 827     psd->str.uType = STRRET_CSTR;
 828     switch (iColumn)
 829     {
 830     case 0:        /* name */
 831         hr = IShellFolder2_GetDisplayNameOf(iface, pidl,
 832                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 833         break;
 834     case 1:        /* size */
 835         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 836         break;
 837     case 2:        /* type */
 838         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 839         break;
 840     case 3:        /* date */
 841         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 842         break;
 843     case 4:        /* attributes */
 844         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 845         break;
 846     }
 847
 848     return hr;
 849 }
 850
 851 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 852                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 853 {
 854     IDesktopFolderImpl *This = impl_from_IShellFolder2(iface);
 855     FIXME ("(%p)->(%d %p) stub\n", This, column, pscid);
 856     return E_NOTIMPL;
 857 }
 858
 859 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 860 {
 861     ISF_Desktop_fnQueryInterface,
 862     ISF_Desktop_fnAddRef,
 863     ISF_Desktop_fnRelease,
 864     ISF_Desktop_fnParseDisplayName,
 865     ISF_Desktop_fnEnumObjects,
 866     ISF_Desktop_fnBindToObject,
 867     ISF_Desktop_fnBindToStorage,
 868     ISF_Desktop_fnCompareIDs,
 869     ISF_Desktop_fnCreateViewObject,
 870     ISF_Desktop_fnGetAttributesOf,
 871     ISF_Desktop_fnGetUIObjectOf,
 872     ISF_Desktop_fnGetDisplayNameOf,
 873     ISF_Desktop_fnSetNameOf,
 874     /* ShellFolder2 */
 875     ISF_Desktop_fnGetDefaultSearchGUID,
 876     ISF_Desktop_fnEnumSearches,
 877     ISF_Desktop_fnGetDefaultColumn,
 878     ISF_Desktop_fnGetDefaultColumnState,
 879     ISF_Desktop_fnGetDetailsEx,
 880     ISF_Desktop_fnGetDetailsOf,
 881     ISF_Desktop_fnMapColumnToSCID
 882 };
 883
 884 /**************************************************************************
 885  *    IPersist
 886  */
 887 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnQueryInterface(
 888     IPersistFolder2 *iface, REFIID riid, LPVOID *ppvObj)
 889 {
 890     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 891     return IShellFolder2_QueryInterface(&This->IShellFolder2_iface, riid, ppvObj);
 892 }
 893
 894 static ULONG WINAPI ISF_Desktop_IPersistFolder2_fnAddRef(
 895     IPersistFolder2 *iface)
 896 {
 897     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 898     return IShellFolder2_AddRef(&This->IShellFolder2_iface);
 899 }
 900
 901 static ULONG WINAPI ISF_Desktop_IPersistFolder2_fnRelease(
 902     IPersistFolder2 *iface)
 903 {
 904     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 905     return IShellFolder2_Release(&This->IShellFolder2_iface);
 906 }
 907
 908 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnGetClassID(
 909     IPersistFolder2 *iface, CLSID *clsid)
 910 {
 911     *clsid = CLSID_ShellDesktop;
 912     return S_OK;
 913 }
 914 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnInitialize(
 915     IPersistFolder2 *iface, LPCITEMIDLIST pidl)
 916 {
 917     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 918     FIXME ("(%p)->(%p) stub\n", This, pidl);
 919     return E_NOTIMPL;
 920 }
 921 static HRESULT WINAPI ISF_Desktop_IPersistFolder2_fnGetCurFolder(
 922     IPersistFolder2 *iface, LPITEMIDLIST *ppidl)
 923 {
 924     IDesktopFolderImpl *This = impl_from_IPersistFolder2( iface );
 925     *ppidl = ILClone(This->pidlRoot);
 926     return S_OK;
 927 }
 928
 929 static const IPersistFolder2Vtbl vt_IPersistFolder2 =
 930 {
 931     ISF_Desktop_IPersistFolder2_fnQueryInterface,
 932     ISF_Desktop_IPersistFolder2_fnAddRef,
 933     ISF_Desktop_IPersistFolder2_fnRelease,
 934     ISF_Desktop_IPersistFolder2_fnGetClassID,
 935     ISF_Desktop_IPersistFolder2_fnInitialize,
 936     ISF_Desktop_IPersistFolder2_fnGetCurFolder
 937 };
 938
 939 void release_desktop_folder(void)
 940 {
 941     if (!cached_sf) return;
 942     SHFree(cached_sf->pidlRoot);
 943     SHFree(cached_sf->sPathTarget);
 944     LocalFree(cached_sf);
 945 }
 946
 947 /**************************************************************************
 948  *    ISF_Desktop_Constructor
 949  */
 950 HRESULT WINAPI ISF_Desktop_Constructor (
 951                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 952 {
 953     WCHAR szMyPath[MAX_PATH];
 954
 955     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 956
 957     if (!ppv)
 958         return E_POINTER;
 959     if (pUnkOuter)
 960         return CLASS_E_NOAGGREGATION;
 961
 962     if (!cached_sf)
 963     {
 964         IDesktopFolderImpl *sf;
 965
 966         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 967             return E_UNEXPECTED;
 968
 969         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IDesktopFolderImpl) );
 970         if (!sf)
 971             return E_OUTOFMEMORY;
 972
 973         sf->ref = 1;
 974         sf->IShellFolder2_iface.lpVtbl = &vt_MCFldr_ShellFolder2;
 975         sf->IPersistFolder2_iface.lpVtbl = &vt_IPersistFolder2;
 976         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 977         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 978         lstrcpyW( sf->sPathTarget, szMyPath );
 979
 980         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 981         {
 982             /* some other thread already been here */
 983             SHFree( sf->pidlRoot );
 984             SHFree( sf->sPathTarget );
 985             LocalFree( sf );
 986         }
 987     }
 988
 989     return IShellFolder2_QueryInterface( &cached_sf->IShellFolder2_iface, riid, ppv );
 990 }