dlls/shell32/shfldr_desktop.c

   1
   2 /*
   3  *    Virtual Desktop Folder
   4  *
   5  *    Copyright 1997            Marcus Meissner
   6  *    Copyright 1998, 1999, 2002    Juergen Schmied
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30
  31 #define COBJMACROS
  32 #define NONAMELESSUNION
  33 #define NONAMELESSSTRUCT
  34
  35 #include "winerror.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winreg.h"
  39 #include "wingdi.h"
  40 #include "winuser.h"
  41
  42 #include "ole2.h"
  43 #include "shlguid.h"
  44
  45 #include "enumidlist.h"
  46 #include "pidl.h"
  47 #include "undocshell.h"
  48 #include "shell32_main.h"
  49 #include "shresdef.h"
  50 #include "shlwapi.h"
  51 #include "shellfolder.h"
  52 #include "wine/debug.h"
  53 #include "debughlp.h"
  54 #include "shfldr.h"
  55
  56 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  57
  58 /* Undocumented functions from shdocvw */
  59 extern HRESULT WINAPI IEParseDisplayNameWithBCW(DWORD codepage, LPCWSTR lpszDisplayName, LPBC pbc, LPITEMIDLIST *ppidl);
  60
  61
  62 /***********************************************************************
  63 *     Desktopfolder implementation
  64 */
  65
  66 typedef struct {
  67     const IShellFolder2Vtbl *lpVtbl;
  68     const IPersistVtbl *lpVtblIPersist;
  69     LONG ref;
  70
  71     /* both paths are parsible from the desktop */
  72     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  73     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  74
  75     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  76     BOOL fAcceptFmt;        /* flag for pending Drop */
  77 } IDesktopFolderImpl;
  78
  79 static inline IDesktopFolderImpl *impl_from_IPersist( IPersist *iface )
  80 {
  81     return (IDesktopFolderImpl *)((char*)iface - FIELD_OFFSET(IDesktopFolderImpl, lpVtblIPersist));
  82 }
  83
  84 static const shvheader desktop_header[] = {
  85     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  86     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  87     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  88     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  89     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  90 };
  91
  92 #define DESKTOPSHELLVIEWCOLUMNS sizeof(desktop_header)/sizeof(shvheader)
  93
  94 /**************************************************************************
  95  *    ISF_Desktop_fnQueryInterface
  96  *
  97  * NOTES supports not IPersistFolder
  98  */
  99 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
 100                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
 101 {
 102     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 103
 104     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 105
 106     *ppvObj = NULL;
 107
 108     if (IsEqualIID (riid, &IID_IUnknown) ||
 109         IsEqualIID (riid, &IID_IShellFolder) ||
 110         IsEqualIID (riid, &IID_IShellFolder2))
 111     {
 112         *ppvObj = This;
 113     }
 114     else if (IsEqualIID (riid, &IID_IPersist))
 115     {
 116         *ppvObj = &This->lpVtblIPersist;
 117     }
 118
 119     if (*ppvObj)
 120     {
 121         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 122         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 123         return S_OK;
 124     }
 125     TRACE ("-- Interface: E_NOINTERFACE\n");
 126     return E_NOINTERFACE;
 127 }
 128
 129 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 130 {
 131     return 2; /* non-heap based object */
 132 }
 133
 134 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 135 {
 136     return 1; /* non-heap based object */
 137 }
 138
 139 /**************************************************************************
 140  *    ISF_Desktop_fnParseDisplayName
 141  *
 142  * NOTES
 143  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 144  *    to MyComputer
 145  */
 146 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 147                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 148                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 149 {
 150     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 151     IShellFolder *shell_folder = (IShellFolder*)iface;
 152     WCHAR szElement[MAX_PATH];
 153     LPCWSTR szNext = NULL;
 154     LPITEMIDLIST pidlTemp = NULL;
 155     HRESULT hr = S_OK;
 156     CLSID clsid;
 157
 158     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 159            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 160            pchEaten, ppidl, pdwAttributes);
 161
 162     if (!ppidl) return E_INVALIDARG;
 163     *ppidl = 0;
 164
 165     if (!lpszDisplayName) return E_INVALIDARG;
 166
 167     if (pchEaten)
 168         *pchEaten = 0;        /* strange but like the original */
 169
 170     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 171     {
 172         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 173         TRACE ("-- element: %s\n", debugstr_w (szElement));
 174         SHCLSIDFromStringW (szElement + 2, &clsid);
 175         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 176     }
 177     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 178     {
 179         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 180         if (UNIXFS_is_rooted_at_desktop())
 181             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 182         else
 183             pidlTemp = _ILCreateMyComputer ();
 184         szNext = lpszDisplayName;
 185     }
 186     else if (PathIsUNCW(lpszDisplayName))
 187     {
 188         pidlTemp = _ILCreateNetwork();
 189         szNext = lpszDisplayName;
 190     }
 191     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 192     {
 193         *ppidl = pidlTemp;
 194         return S_OK;
 195     }
 196     else if (strchrW(lpszDisplayName,':'))
 197     {
 198         PARSEDURLW urldata;
 199
 200         urldata.cbSize = sizeof(urldata);
 201         ParseURLW(lpszDisplayName,&urldata);
 202
 203         if (urldata.nScheme == URL_SCHEME_SHELL) /* handle shell: urls */
 204         {
 205             TRACE ("-- shell url: %s\n", debugstr_w(urldata.pszSuffix));
 206             SHCLSIDFromStringW (urldata.pszSuffix+2, &clsid);
 207             pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 208         }
 209         else
 210             return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 211     }
 212     else
 213     {
 214         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 215
 216         if (*lpszDisplayName)
 217         {
 218             WCHAR szPath[MAX_PATH];
 219             LPWSTR pathPtr;
 220
 221             /* build a complete path to create a simple pidl */
 222             lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 223             pathPtr = PathAddBackslashW(szPath);
 224             if (pathPtr)
 225             {
 226                 lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 227                 hr = _ILCreateFromPathW(szPath, &pidlTemp);
 228             }
 229             else
 230             {
 231                 /* should never reach here, but for completeness */
 232                 hr = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
 233             }
 234         }
 235         else
 236             pidlTemp = _ILCreateMyComputer();
 237
 238         szNext = NULL;
 239     }
 240
 241     if (SUCCEEDED(hr) && pidlTemp)
 242     {
 243         if (szNext && *szNext)
 244         {
 245             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 246                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 247         }
 248         else
 249         {
 250             if (pdwAttributes && *pdwAttributes)
 251                 hr = SHELL32_GetItemAttributes(shell_folder, pidlTemp, pdwAttributes);
 252         }
 253     }
 254
 255     *ppidl = pidlTemp;
 256
 257     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 258
 259     return hr;
 260 }
 261
 262 /**************************************************************************
 263  *  CreateDesktopEnumList()
 264  */
 265 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 266  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 267  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 268  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 269  'a','c','e','\0' };
 270
 271 static BOOL CreateDesktopEnumList(IEnumIDList *list, DWORD dwFlags)
 272 {
 273     BOOL ret = TRUE;
 274     WCHAR szPath[MAX_PATH];
 275
 276     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 277
 278     /* enumerate the root folders */
 279     if (dwFlags & SHCONTF_FOLDERS)
 280     {
 281         HKEY hkey;
 282         UINT i;
 283
 284         /* create the pidl for This item */
 285         ret = AddToEnumList(list, _ILCreateMyComputer());
 286
 287         for (i=0; i<2; i++) {
 288             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 289                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 290             {
 291                 WCHAR iid[50];
 292                 int i=0;
 293
 294                 while (ret)
 295                 {
 296                     DWORD size;
 297                     LONG r;
 298
 299                     size = sizeof (iid) / sizeof (iid[0]);
 300                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 301                     if (ERROR_SUCCESS == r)
 302                     {
 303                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 304                         i++;
 305                     }
 306                     else if (ERROR_NO_MORE_ITEMS == r)
 307                         break;
 308                     else
 309                         ret = FALSE;
 310                 }
 311                 RegCloseKey(hkey);
 312             }
 313         }
 314     }
 315
 316     /* enumerate the elements in %windir%\desktop */
 317     SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 318     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 319
 320     return ret;
 321 }
 322
 323 /**************************************************************************
 324  *        ISF_Desktop_fnEnumObjects
 325  */
 326 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 327                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 328 {
 329     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 330
 331     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 332            This, hwndOwner, dwFlags, ppEnumIDList);
 333
 334     *ppEnumIDList = IEnumIDList_Constructor();
 335     if (*ppEnumIDList)
 336         CreateDesktopEnumList(*ppEnumIDList, dwFlags);
 337
 338     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 339
 340     return *ppEnumIDList ? S_OK : E_OUTOFMEMORY;
 341 }
 342
 343 /**************************************************************************
 344  *        ISF_Desktop_fnBindToObject
 345  */
 346 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 347                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 348 {
 349     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 350
 351     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 352            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 353
 354     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 355 }
 356
 357 /**************************************************************************
 358  *    ISF_Desktop_fnBindToStorage
 359  */
 360 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 361                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 362 {
 363     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 364
 365     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 366            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 367
 368     *ppvOut = NULL;
 369     return E_NOTIMPL;
 370 }
 371
 372 /**************************************************************************
 373  *     ISF_Desktop_fnCompareIDs
 374  */
 375 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 *iface,
 376                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 377 {
 378     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 379     IShellFolder *shell_folder = (IShellFolder*)iface;
 380     HRESULT hr;
 381
 382     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 383     hr = SHELL32_CompareIDs ( shell_folder, lParam, pidl1, pidl2);
 384     TRACE ("-- 0x%08x\n", hr);
 385     return hr;
 386 }
 387
 388 /**************************************************************************
 389  *    ISF_Desktop_fnCreateViewObject
 390  */
 391 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 392                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 393 {
 394     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 395     LPSHELLVIEW pShellView;
 396     HRESULT hr = E_INVALIDARG;
 397
 398     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 399            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 400
 401     if (!ppvOut)
 402         return E_INVALIDARG;
 403
 404     *ppvOut = NULL;
 405
 406     if (IsEqualIID (riid, &IID_IDropTarget))
 407     {
 408         WARN ("IDropTarget not implemented\n");
 409         hr = E_NOTIMPL;
 410     }
 411     else if (IsEqualIID (riid, &IID_IContextMenu))
 412     {
 413         WARN ("IContextMenu not implemented\n");
 414         hr = E_NOTIMPL;
 415     }
 416     else if (IsEqualIID (riid, &IID_IShellView))
 417     {
 418         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 419         if (pShellView)
 420         {
 421             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 422             IShellView_Release (pShellView);
 423         }
 424     }
 425     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 426     return hr;
 427 }
 428
 429 /**************************************************************************
 430  *  ISF_Desktop_fnGetAttributesOf
 431  */
 432 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 433                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 434 {
 435     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 436     IShellFolder *shell_folder = (IShellFolder*)iface;
 437
 438     static const DWORD dwDesktopAttributes =
 439         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 440         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 441     static const DWORD dwMyComputerAttributes =
 442         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 443         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 444
 445     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 446            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 447
 448     if (!rgfInOut)
 449         return E_INVALIDARG;
 450     if (cidl && !apidl)
 451         return E_INVALIDARG;
 452
 453     if (*rgfInOut == 0)
 454         *rgfInOut = ~0;
 455
 456     if(cidl == 0) {
 457         *rgfInOut &= dwDesktopAttributes;
 458     } else {
 459         while (cidl > 0 && *apidl) {
 460             pdump (*apidl);
 461             if (_ILIsDesktop(*apidl)) {
 462                 *rgfInOut &= dwDesktopAttributes;
 463             } else if (_ILIsMyComputer(*apidl)) {
 464                 *rgfInOut &= dwMyComputerAttributes;
 465             } else {
 466                 SHELL32_GetItemAttributes ( shell_folder, *apidl, rgfInOut);
 467             }
 468             apidl++;
 469             cidl--;
 470         }
 471     }
 472     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 473     *rgfInOut &= ~SFGAO_VALIDATE;
 474
 475     TRACE ("-- result=0x%08x\n", *rgfInOut);
 476
 477     return S_OK;
 478 }
 479
 480 /**************************************************************************
 481  *    ISF_Desktop_fnGetUIObjectOf
 482  *
 483  * PARAMETERS
 484  *  HWND           hwndOwner, //[in ] Parent window for any output
 485  *  UINT           cidl,      //[in ] array size
 486  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 487  *  REFIID         riid,      //[in ] Requested Interface
 488  *  UINT*          prgfInOut, //[   ] reserved
 489  *  LPVOID*        ppvObject) //[out] Resulting Interface
 490  *
 491  */
 492 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 493                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 494                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 495 {
 496     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 497
 498     LPITEMIDLIST pidl;
 499     IUnknown *pObj = NULL;
 500     HRESULT hr = E_INVALIDARG;
 501
 502     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 503        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 504
 505     if (!ppvOut)
 506         return E_INVALIDARG;
 507
 508     *ppvOut = NULL;
 509
 510     if (IsEqualIID (riid, &IID_IContextMenu))
 511     {
 512         if (cidl > 0)
 513             pObj = (LPUNKNOWN) ISvItemCm_Constructor( (IShellFolder *) iface, This->pidlRoot, apidl, cidl);
 514         else
 515             pObj = (LPUNKNOWN) ISvBgCm_Constructor( (IShellFolder *) iface, TRUE);
 516         hr = S_OK;
 517     }
 518     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 519     {
 520         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 521                                                   This->pidlRoot, apidl, cidl);
 522         hr = S_OK;
 523     }
 524     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 525     {
 526         pidl = ILCombine (This->pidlRoot, apidl[0]);
 527         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 528         SHFree (pidl);
 529         hr = S_OK;
 530     }
 531     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 532     {
 533         pidl = ILCombine (This->pidlRoot, apidl[0]);
 534         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 535         SHFree (pidl);
 536         hr = S_OK;
 537     }
 538     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 539     {
 540         hr = IShellFolder_QueryInterface (iface,
 541                                           &IID_IDropTarget, (LPVOID *) & pObj);
 542     }
 543     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 544               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 545     {
 546         pidl = ILCombine (This->pidlRoot, apidl[0]);
 547         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, (LPVOID*)&pObj);
 548         SHFree (pidl);
 549     }
 550     else
 551         hr = E_NOINTERFACE;
 552
 553     if (SUCCEEDED(hr) && !pObj)
 554         hr = E_OUTOFMEMORY;
 555
 556     *ppvOut = pObj;
 557     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 558     return hr;
 559 }
 560
 561 /**************************************************************************
 562  *    ISF_Desktop_fnGetDisplayNameOf
 563  *
 564  * NOTES
 565  *    special case: pidl = null gives desktop-name back
 566  */
 567 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 568                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 569 {
 570     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 571     HRESULT hr = S_OK;
 572     LPWSTR pszPath;
 573
 574     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 575     pdump (pidl);
 576
 577     if (!strRet)
 578         return E_INVALIDARG;
 579
 580     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 581     if (!pszPath)
 582         return E_OUTOFMEMORY;
 583
 584     if (_ILIsDesktop (pidl))
 585     {
 586         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 587             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 588             strcpyW(pszPath, This->sPathTarget);
 589         else
 590             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 591     }
 592     else if (_ILIsPidlSimple (pidl))
 593     {
 594         GUID const *clsid;
 595
 596         if ((clsid = _ILGetGUIDPointer (pidl)))
 597         {
 598             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 599             {
 600                 int bWantsForParsing;
 601
 602                 /*
 603                  * We can only get a filesystem path from a shellfolder if the
 604                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 605                  *
 606                  * Exception: The MyComputer folder doesn't have this key,
 607                  *   but any other filesystem backed folder it needs it.
 608                  */
 609                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 610                 {
 611                     bWantsForParsing = TRUE;
 612                 }
 613                 else
 614                 {
 615                     /* get the "WantsFORPARSING" flag from the registry */
 616                     static const WCHAR clsidW[] =
 617                      { 'C','L','S','I','D','\\',0 };
 618                     static const WCHAR shellfolderW[] =
 619                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 620                     static const WCHAR wantsForParsingW[] =
 621                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 622                      'g',0 };
 623                     WCHAR szRegPath[100];
 624                     LONG r;
 625
 626                     lstrcpyW (szRegPath, clsidW);
 627                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 628                     lstrcatW (szRegPath, shellfolderW);
 629                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 630                                     wantsForParsingW, NULL, NULL, NULL);
 631                     if (r == ERROR_SUCCESS)
 632                         bWantsForParsing = TRUE;
 633                     else
 634                         bWantsForParsing = FALSE;
 635                 }
 636
 637                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 638                      bWantsForParsing)
 639                 {
 640                     /*
 641                      * we need the filesystem path to the destination folder.
 642                      * Only the folder itself can know it
 643                      */
 644                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 645                                                         pszPath,
 646                                                         MAX_PATH);
 647                 }
 648                 else
 649                 {
 650                     /* parsing name like ::{...} */
 651                     pszPath[0] = ':';
 652                     pszPath[1] = ':';
 653                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 654                 }
 655             }
 656             else
 657             {
 658                 /* user friendly name */
 659                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 660             }
 661         }
 662         else
 663         {
 664             int cLen = 0;
 665
 666             /* file system folder or file rooted at the desktop */
 667             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 668                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 669             {
 670                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 671                 PathAddBackslashW(pszPath);
 672                 cLen = lstrlenW(pszPath);
 673             }
 674
 675             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 676
 677             if (!_ILIsFolder(pidl))
 678                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 679         }
 680     }
 681     else
 682     {
 683         /* a complex pidl, let the subfolder do the work */
 684         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 685                                             pszPath, MAX_PATH);
 686     }
 687
 688     if (SUCCEEDED(hr))
 689     {
 690         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 691         if (GetVersion() & 0x80000000)
 692         {
 693             strRet->uType = STRRET_CSTR;
 694             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 695                                      NULL, NULL))
 696                 strRet->u.cStr[0] = '\0';
 697             CoTaskMemFree(pszPath);
 698         }
 699         else
 700         {
 701             strRet->uType = STRRET_WSTR;
 702             strRet->u.pOleStr = pszPath;
 703         }
 704     }
 705     else
 706         CoTaskMemFree(pszPath);
 707
 708     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 709     strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 710     debugstr_w(strRet->u.pOleStr), hr);
 711     return hr;
 712 }
 713
 714 /**************************************************************************
 715  *  ISF_Desktop_fnSetNameOf
 716  *  Changes the name of a file object or subfolder, possibly changing its item
 717  *  identifier in the process.
 718  *
 719  * PARAMETERS
 720  *  HWND          hwndOwner,  //[in ] Owner window for output
 721  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 722  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 723  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 724  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 725  */
 726 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 727                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 728                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 729 {
 730     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 731
 732     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p) stub\n", This, hwndOwner, pidl,
 733            debugstr_w (lpName), dwFlags, pPidlOut);
 734
 735     return E_FAIL;
 736 }
 737
 738 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 739                 GUID * pguid)
 740 {
 741     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 742     FIXME ("(%p)->(%p) stub\n", This, pguid);
 743     return E_NOTIMPL;
 744 }
 745
 746 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 747                 IEnumExtraSearch ** ppenum)
 748 {
 749     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 750     FIXME ("(%p)->(%p) stub\n", This, ppenum);
 751     return E_NOTIMPL;
 752 }
 753
 754 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 755                 DWORD reserved, ULONG * pSort, ULONG * pDisplay)
 756 {
 757     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 758
 759     TRACE ("(%p)->(%d %p %p)\n", This, reserved, pSort, pDisplay);
 760
 761     if (pSort)
 762         *pSort = 0;
 763     if (pDisplay)
 764         *pDisplay = 0;
 765
 766     return S_OK;
 767 }
 768 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 769                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 770 {
 771     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 772
 773     TRACE ("(%p)->(%d %p)\n", This, iColumn, pcsFlags);
 774
 775     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 776     return E_INVALIDARG;
 777
 778     *pcsFlags = desktop_header[iColumn].pcsFlags;
 779
 780     return S_OK;
 781 }
 782
 783 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 784                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 785 {
 786     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 787     FIXME ("(%p)->(%p %p %p) stub\n", This, pidl, pscid, pv);
 788     return E_NOTIMPL;
 789 }
 790
 791 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 792                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 793 {
 794     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 795
 796     HRESULT hr = S_OK;
 797
 798     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 799
 800     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 801         return E_INVALIDARG;
 802
 803     if (!pidl)
 804         return SHELL32_GetColumnDetails(desktop_header, iColumn, psd);
 805
 806     /* the data from the pidl */
 807     psd->str.uType = STRRET_CSTR;
 808     switch (iColumn)
 809     {
 810     case 0:        /* name */
 811         hr = IShellFolder_GetDisplayNameOf(iface, pidl,
 812                    SHGDN_NORMAL | SHGDN_INFOLDER, &psd->str);
 813         break;
 814     case 1:        /* size */
 815         _ILGetFileSize (pidl, psd->str.u.cStr, MAX_PATH);
 816         break;
 817     case 2:        /* type */
 818         _ILGetFileType (pidl, psd->str.u.cStr, MAX_PATH);
 819         break;
 820     case 3:        /* date */
 821         _ILGetFileDate (pidl, psd->str.u.cStr, MAX_PATH);
 822         break;
 823     case 4:        /* attributes */
 824         _ILGetFileAttributes (pidl, psd->str.u.cStr, MAX_PATH);
 825         break;
 826     }
 827
 828     return hr;
 829 }
 830
 831 static HRESULT WINAPI ISF_Desktop_fnMapColumnToSCID (
 832                 IShellFolder2 * iface, UINT column, SHCOLUMNID * pscid)
 833 {
 834     IDesktopFolderImpl *This = (IDesktopFolderImpl *)iface;
 835     FIXME ("(%p)->(%d %p) stub\n", This, column, pscid);
 836     return E_NOTIMPL;
 837 }
 838
 839 static const IShellFolder2Vtbl vt_MCFldr_ShellFolder2 =
 840 {
 841     ISF_Desktop_fnQueryInterface,
 842     ISF_Desktop_fnAddRef,
 843     ISF_Desktop_fnRelease,
 844     ISF_Desktop_fnParseDisplayName,
 845     ISF_Desktop_fnEnumObjects,
 846     ISF_Desktop_fnBindToObject,
 847     ISF_Desktop_fnBindToStorage,
 848     ISF_Desktop_fnCompareIDs,
 849     ISF_Desktop_fnCreateViewObject,
 850     ISF_Desktop_fnGetAttributesOf,
 851     ISF_Desktop_fnGetUIObjectOf,
 852     ISF_Desktop_fnGetDisplayNameOf,
 853     ISF_Desktop_fnSetNameOf,
 854     /* ShellFolder2 */
 855     ISF_Desktop_fnGetDefaultSearchGUID,
 856     ISF_Desktop_fnEnumSearches,
 857     ISF_Desktop_fnGetDefaultColumn,
 858     ISF_Desktop_fnGetDefaultColumnState,
 859     ISF_Desktop_fnGetDetailsEx,
 860     ISF_Desktop_fnGetDetailsOf,
 861     ISF_Desktop_fnMapColumnToSCID
 862 };
 863
 864 /**************************************************************************
 865  *    IPersist
 866  */
 867 static HRESULT WINAPI ISF_Desktop_IPersist_fnQueryInterface(
 868     IPersist *iface, REFIID riid, LPVOID *ppvObj)
 869 {
 870     IDesktopFolderImpl *This = impl_from_IPersist( iface );
 871     return IShellFolder2_QueryInterface((IShellFolder2*)This, riid, ppvObj);
 872 }
 873
 874 static ULONG WINAPI ISF_Desktop_IPersist_fnAddRef(IPersist *iface)
 875 {
 876     IDesktopFolderImpl *This = impl_from_IPersist( iface );
 877     return IShellFolder2_AddRef((IShellFolder2*)This);
 878 }
 879
 880 static ULONG WINAPI ISF_Desktop_IPersist_fnRelease(IPersist *iface)
 881 {
 882     IDesktopFolderImpl *This = impl_from_IPersist( iface );
 883     return IShellFolder2_Release((IShellFolder2*)This);
 884 }
 885
 886 static HRESULT WINAPI ISF_Desktop_IPersist_fnGetClassID(IPersist *iface, CLSID *clsid)
 887 {
 888     *clsid = CLSID_ShellDesktop;
 889     return S_OK;
 890 }
 891
 892 static const IPersistVtbl vt_IPersist =
 893 {
 894     ISF_Desktop_IPersist_fnQueryInterface,
 895     ISF_Desktop_IPersist_fnAddRef,
 896     ISF_Desktop_IPersist_fnRelease,
 897     ISF_Desktop_IPersist_fnGetClassID
 898 };
 899
 900 /**************************************************************************
 901  *    ISF_Desktop_Constructor
 902  */
 903 HRESULT WINAPI ISF_Desktop_Constructor (
 904                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 905 {
 906     static IDesktopFolderImpl *cached_sf;
 907     WCHAR szMyPath[MAX_PATH];
 908
 909     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 910
 911     if (!ppv)
 912         return E_POINTER;
 913     if (pUnkOuter)
 914         return CLASS_E_NOAGGREGATION;
 915
 916     if (!cached_sf)
 917     {
 918         IDesktopFolderImpl *sf;
 919
 920         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 921             return E_UNEXPECTED;
 922
 923         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IDesktopFolderImpl) );
 924         if (!sf)
 925             return E_OUTOFMEMORY;
 926
 927         sf->ref = 1;
 928         sf->lpVtbl = &vt_MCFldr_ShellFolder2;
 929         sf->lpVtblIPersist = &vt_IPersist;
 930         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 931         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 932         lstrcpyW( sf->sPathTarget, szMyPath );
 933
 934         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 935         {
 936             /* some other thread already been here */
 937             SHFree( sf->pidlRoot );
 938             SHFree( sf->sPathTarget );
 939             LocalFree( sf );
 940         }
 941     }
 942
 943     return IUnknown_QueryInterface( (IShellFolder2*)cached_sf, riid, ppv );
 944 }