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     LONG ref;
  69
  70     /* both paths are parsible from the desktop */
  71     LPWSTR sPathTarget;     /* complete path to target used for enumeration and ChangeNotify */
  72     LPITEMIDLIST pidlRoot;  /* absolute pidl */
  73
  74     UINT cfShellIDList;        /* clipboardformat for IDropTarget */
  75     BOOL fAcceptFmt;        /* flag for pending Drop */
  76 } IGenericSFImpl;
  77
  78 #define _IUnknown_(This)    (IShellFolder*)&(This->lpVtbl)
  79 #define _IShellFolder_(This)    (IShellFolder*)&(This->lpVtbl)
  80
  81 static const shvheader DesktopSFHeader[] = {
  82     {IDS_SHV_COLUMN1, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 15},
  83     {IDS_SHV_COLUMN2, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  84     {IDS_SHV_COLUMN3, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 10},
  85     {IDS_SHV_COLUMN4, SHCOLSTATE_TYPE_DATE | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 12},
  86     {IDS_SHV_COLUMN5, SHCOLSTATE_TYPE_STR | SHCOLSTATE_ONBYDEFAULT, LVCFMT_RIGHT, 5}
  87 };
  88
  89 #define DESKTOPSHELLVIEWCOLUMNS 5
  90
  91 /**************************************************************************
  92  *    ISF_Desktop_fnQueryInterface
  93  *
  94  * NOTES supports not IPersist/IPersistFolder
  95  */
  96 static HRESULT WINAPI ISF_Desktop_fnQueryInterface(
  97                 IShellFolder2 * iface, REFIID riid, LPVOID * ppvObj)
  98 {
  99     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 100
 101     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 102
 103     *ppvObj = NULL;
 104
 105     if (IsEqualIID (riid, &IID_IUnknown) ||
 106         IsEqualIID (riid, &IID_IShellFolder) ||
 107         IsEqualIID (riid, &IID_IShellFolder2))
 108     {
 109         *ppvObj = This;
 110     }
 111
 112     if (*ppvObj)
 113     {
 114         IUnknown_AddRef ((IUnknown *) (*ppvObj));
 115         TRACE ("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 116         return S_OK;
 117     }
 118     TRACE ("-- Interface: E_NOINTERFACE\n");
 119     return E_NOINTERFACE;
 120 }
 121
 122 static ULONG WINAPI ISF_Desktop_fnAddRef (IShellFolder2 * iface)
 123 {
 124     return 2; /* non-heap based object */
 125 }
 126
 127 static ULONG WINAPI ISF_Desktop_fnRelease (IShellFolder2 * iface)
 128 {
 129     return 1; /* non-heap based object */
 130 }
 131
 132 /**************************************************************************
 133  *    ISF_Desktop_fnParseDisplayName
 134  *
 135  * NOTES
 136  *    "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and "" binds
 137  *    to MyComputer
 138  */
 139 static HRESULT WINAPI ISF_Desktop_fnParseDisplayName (IShellFolder2 * iface,
 140                 HWND hwndOwner, LPBC pbc, LPOLESTR lpszDisplayName,
 141                 DWORD * pchEaten, LPITEMIDLIST * ppidl, DWORD * pdwAttributes)
 142 {
 143     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 144     WCHAR szElement[MAX_PATH];
 145     LPCWSTR szNext = NULL;
 146     LPITEMIDLIST pidlTemp = NULL;
 147     HRESULT hr = S_OK;
 148     CLSID clsid;
 149
 150     TRACE ("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n",
 151            This, hwndOwner, pbc, lpszDisplayName, debugstr_w(lpszDisplayName),
 152            pchEaten, ppidl, pdwAttributes);
 153
 154     if (!lpszDisplayName || !ppidl)
 155         return E_INVALIDARG;
 156
 157     *ppidl = 0;
 158
 159     if (pchEaten)
 160         *pchEaten = 0;        /* strange but like the original */
 161
 162     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
 163     {
 164         szNext = GetNextElementW (lpszDisplayName, szElement, MAX_PATH);
 165         TRACE ("-- element: %s\n", debugstr_w (szElement));
 166         SHCLSIDFromStringW (szElement + 2, &clsid);
 167         pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 168     }
 169     else if (PathGetDriveNumberW (lpszDisplayName) >= 0)
 170     {
 171         /* it's a filesystem path with a drive. Let MyComputer/UnixDosFolder parse it */
 172         if (UNIXFS_is_rooted_at_desktop())
 173             pidlTemp = _ILCreateGuid(PT_GUID, &CLSID_UnixDosFolder);
 174         else
 175             pidlTemp = _ILCreateMyComputer ();
 176         szNext = lpszDisplayName;
 177     }
 178     else if (PathIsUNCW(lpszDisplayName))
 179     {
 180         pidlTemp = _ILCreateNetwork();
 181         szNext = lpszDisplayName;
 182     }
 183     else if( (pidlTemp = SHELL32_CreatePidlFromBindCtx(pbc, lpszDisplayName)) )
 184     {
 185         *ppidl = pidlTemp;
 186         return S_OK;
 187     }
 188     else if (strchrW(lpszDisplayName,':'))
 189     {
 190         PARSEDURLW urldata;
 191
 192         urldata.cbSize = sizeof(urldata);
 193         ParseURLW(lpszDisplayName,&urldata);
 194
 195         if (urldata.nScheme == URL_SCHEME_SHELL) /* handle shell: urls */
 196         {
 197             TRACE ("-- shell url: %s\n", debugstr_w(urldata.pszSuffix));
 198             SHCLSIDFromStringW (urldata.pszSuffix+2, &clsid);
 199             pidlTemp = _ILCreateGuid (PT_GUID, &clsid);
 200         }
 201         else
 202             return IEParseDisplayNameWithBCW(CP_ACP,lpszDisplayName,pbc,ppidl);
 203     }
 204     else
 205     {
 206         /* it's a filesystem path on the desktop. Let a FSFolder parse it */
 207
 208         if (*lpszDisplayName)
 209         {
 210             WCHAR szPath[MAX_PATH];
 211             LPWSTR pathPtr;
 212
 213             /* build a complete path to create a simple pidl */
 214             lstrcpynW(szPath, This->sPathTarget, MAX_PATH);
 215             pathPtr = PathAddBackslashW(szPath);
 216             if (pathPtr)
 217             {
 218                 lstrcpynW(pathPtr, lpszDisplayName, MAX_PATH - (pathPtr - szPath));
 219                 hr = _ILCreateFromPathW(szPath, &pidlTemp);
 220             }
 221             else
 222             {
 223                 /* should never reach here, but for completeness */
 224                 hr = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
 225             }
 226         }
 227         else
 228             pidlTemp = _ILCreateMyComputer();
 229
 230         szNext = NULL;
 231     }
 232
 233     if (SUCCEEDED(hr) && pidlTemp)
 234     {
 235         if (szNext && *szNext)
 236         {
 237             hr = SHELL32_ParseNextElement(iface, hwndOwner, pbc,
 238                     &pidlTemp, (LPOLESTR) szNext, pchEaten, pdwAttributes);
 239         }
 240         else
 241         {
 242             if (pdwAttributes && *pdwAttributes)
 243                 hr = SHELL32_GetItemAttributes(_IShellFolder_ (This),
 244                                                pidlTemp, pdwAttributes);
 245         }
 246     }
 247
 248     *ppidl = pidlTemp;
 249
 250     TRACE ("(%p)->(-- ret=0x%08x)\n", This, hr);
 251
 252     return hr;
 253 }
 254
 255 /**************************************************************************
 256  *  CreateDesktopEnumList()
 257  */
 258 static const WCHAR Desktop_NameSpaceW[] = { 'S','O','F','T','W','A','R','E',
 259  '\\','M','i','c','r','o','s','o','f','t','\\','W','i','n','d','o','w','s','\\',
 260  'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\','E','x','p','l',
 261  'o','r','e','r','\\','D','e','s','k','t','o','p','\\','N','a','m','e','s','p',
 262  'a','c','e','\0' };
 263
 264 static BOOL CreateDesktopEnumList(IEnumIDList *list, DWORD dwFlags)
 265 {
 266     BOOL ret = TRUE;
 267     WCHAR szPath[MAX_PATH];
 268
 269     TRACE("(%p)->(flags=0x%08x)\n", list, dwFlags);
 270
 271     /* enumerate the root folders */
 272     if (dwFlags & SHCONTF_FOLDERS)
 273     {
 274         HKEY hkey;
 275         UINT i;
 276
 277         /* create the pidl for This item */
 278         ret = AddToEnumList(list, _ILCreateMyComputer());
 279
 280         for (i=0; i<2; i++) {
 281             if (ret && !RegOpenKeyExW(i == 0 ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
 282                                       Desktop_NameSpaceW, 0, KEY_READ, &hkey))
 283             {
 284                 WCHAR iid[50];
 285                 int i=0;
 286
 287                 while (ret)
 288                 {
 289                     DWORD size;
 290                     LONG r;
 291
 292                     size = sizeof (iid) / sizeof (iid[0]);
 293                     r = RegEnumKeyExW(hkey, i, iid, &size, 0, NULL, NULL, NULL);
 294                     if (ERROR_SUCCESS == r)
 295                     {
 296                         ret = AddToEnumList(list, _ILCreateGuidFromStrW(iid));
 297                         i++;
 298                     }
 299                     else if (ERROR_NO_MORE_ITEMS == r)
 300                         break;
 301                     else
 302                         ret = FALSE;
 303                 }
 304                 RegCloseKey(hkey);
 305             }
 306         }
 307     }
 308
 309     /* enumerate the elements in %windir%\desktop */
 310     SHGetSpecialFolderPathW(0, szPath, CSIDL_DESKTOPDIRECTORY, FALSE);
 311     ret = ret && CreateFolderEnumList(list, szPath, dwFlags);
 312
 313     return ret;
 314 }
 315
 316 /**************************************************************************
 317  *        ISF_Desktop_fnEnumObjects
 318  */
 319 static HRESULT WINAPI ISF_Desktop_fnEnumObjects (IShellFolder2 * iface,
 320                 HWND hwndOwner, DWORD dwFlags, LPENUMIDLIST * ppEnumIDList)
 321 {
 322     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 323
 324     TRACE ("(%p)->(HWND=%p flags=0x%08x pplist=%p)\n",
 325            This, hwndOwner, dwFlags, ppEnumIDList);
 326
 327     *ppEnumIDList = IEnumIDList_Constructor();
 328     if (*ppEnumIDList)
 329         CreateDesktopEnumList(*ppEnumIDList, dwFlags);
 330
 331     TRACE ("-- (%p)->(new ID List: %p)\n", This, *ppEnumIDList);
 332
 333     return *ppEnumIDList ? S_OK : E_OUTOFMEMORY;
 334 }
 335
 336 /**************************************************************************
 337  *        ISF_Desktop_fnBindToObject
 338  */
 339 static HRESULT WINAPI ISF_Desktop_fnBindToObject (IShellFolder2 * iface,
 340                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 341 {
 342     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 343
 344     TRACE ("(%p)->(pidl=%p,%p,%s,%p)\n",
 345            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 346
 347     return SHELL32_BindToChild( This->pidlRoot, This->sPathTarget, pidl, riid, ppvOut );
 348 }
 349
 350 /**************************************************************************
 351  *    ISF_Desktop_fnBindToStorage
 352  */
 353 static HRESULT WINAPI ISF_Desktop_fnBindToStorage (IShellFolder2 * iface,
 354                 LPCITEMIDLIST pidl, LPBC pbcReserved, REFIID riid, LPVOID * ppvOut)
 355 {
 356     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 357
 358     FIXME ("(%p)->(pidl=%p,%p,%s,%p) stub\n",
 359            This, pidl, pbcReserved, shdebugstr_guid (riid), ppvOut);
 360
 361     *ppvOut = NULL;
 362     return E_NOTIMPL;
 363 }
 364
 365 /**************************************************************************
 366  *     ISF_Desktop_fnCompareIDs
 367  */
 368 static HRESULT WINAPI ISF_Desktop_fnCompareIDs (IShellFolder2 * iface,
 369                         LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 370 {
 371     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 372     int nReturn;
 373
 374     TRACE ("(%p)->(0x%08lx,pidl1=%p,pidl2=%p)\n", This, lParam, pidl1, pidl2);
 375     nReturn = SHELL32_CompareIDs (_IShellFolder_ (This), lParam, pidl1, pidl2);
 376     TRACE ("-- %i\n", nReturn);
 377     return nReturn;
 378 }
 379
 380 /**************************************************************************
 381  *    ISF_Desktop_fnCreateViewObject
 382  */
 383 static HRESULT WINAPI ISF_Desktop_fnCreateViewObject (IShellFolder2 * iface,
 384                               HWND hwndOwner, REFIID riid, LPVOID * ppvOut)
 385 {
 386     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 387     LPSHELLVIEW pShellView;
 388     HRESULT hr = E_INVALIDARG;
 389
 390     TRACE ("(%p)->(hwnd=%p,%s,%p)\n",
 391            This, hwndOwner, shdebugstr_guid (riid), ppvOut);
 392
 393     if (!ppvOut)
 394         return hr;
 395
 396     *ppvOut = NULL;
 397
 398     if (IsEqualIID (riid, &IID_IDropTarget))
 399     {
 400         WARN ("IDropTarget not implemented\n");
 401         hr = E_NOTIMPL;
 402     }
 403     else if (IsEqualIID (riid, &IID_IContextMenu))
 404     {
 405         WARN ("IContextMenu not implemented\n");
 406         hr = E_NOTIMPL;
 407     }
 408     else if (IsEqualIID (riid, &IID_IShellView))
 409     {
 410         pShellView = IShellView_Constructor ((IShellFolder *) iface);
 411         if (pShellView)
 412         {
 413             hr = IShellView_QueryInterface (pShellView, riid, ppvOut);
 414             IShellView_Release (pShellView);
 415         }
 416     }
 417     TRACE ("-- (%p)->(interface=%p)\n", This, ppvOut);
 418     return hr;
 419 }
 420
 421 /**************************************************************************
 422  *  ISF_Desktop_fnGetAttributesOf
 423  */
 424 static HRESULT WINAPI ISF_Desktop_fnGetAttributesOf (IShellFolder2 * iface,
 425                 UINT cidl, LPCITEMIDLIST * apidl, DWORD * rgfInOut)
 426 {
 427     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 428     HRESULT hr = S_OK;
 429     static const DWORD dwDesktopAttributes =
 430         SFGAO_STORAGE | SFGAO_HASPROPSHEET | SFGAO_STORAGEANCESTOR |
 431         SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_FILESYSTEM | SFGAO_HASSUBFOLDER;
 432     static const DWORD dwMyComputerAttributes =
 433         SFGAO_CANRENAME | SFGAO_CANDELETE | SFGAO_HASPROPSHEET |
 434         SFGAO_DROPTARGET | SFGAO_FILESYSANCESTOR | SFGAO_FOLDER | SFGAO_HASSUBFOLDER;
 435
 436     TRACE ("(%p)->(cidl=%d apidl=%p mask=%p (0x%08x))\n",
 437            This, cidl, apidl, rgfInOut, rgfInOut ? *rgfInOut : 0);
 438
 439     if (!rgfInOut)
 440         return E_INVALIDARG;
 441     if (cidl && !apidl)
 442         return E_INVALIDARG;
 443
 444     if (*rgfInOut == 0)
 445         *rgfInOut = ~0;
 446
 447     if(cidl == 0) {
 448         *rgfInOut &= dwDesktopAttributes;
 449     } else {
 450         while (cidl > 0 && *apidl) {
 451             pdump (*apidl);
 452             if (_ILIsDesktop(*apidl)) {
 453                 *rgfInOut &= dwDesktopAttributes;
 454             } else if (_ILIsMyComputer(*apidl)) {
 455                 *rgfInOut &= dwMyComputerAttributes;
 456             } else {
 457                 SHELL32_GetItemAttributes (_IShellFolder_ (This), *apidl, rgfInOut);
 458             }
 459             apidl++;
 460             cidl--;
 461         }
 462     }
 463     /* make sure SFGAO_VALIDATE is cleared, some apps depend on that */
 464     *rgfInOut &= ~SFGAO_VALIDATE;
 465
 466     TRACE ("-- result=0x%08x\n", *rgfInOut);
 467
 468     return hr;
 469 }
 470
 471 /**************************************************************************
 472  *    ISF_Desktop_fnGetUIObjectOf
 473  *
 474  * PARAMETERS
 475  *  HWND           hwndOwner, //[in ] Parent window for any output
 476  *  UINT           cidl,      //[in ] array size
 477  *  LPCITEMIDLIST* apidl,     //[in ] simple pidl array
 478  *  REFIID         riid,      //[in ] Requested Interface
 479  *  UINT*          prgfInOut, //[   ] reserved
 480  *  LPVOID*        ppvObject) //[out] Resulting Interface
 481  *
 482  */
 483 static HRESULT WINAPI ISF_Desktop_fnGetUIObjectOf (IShellFolder2 * iface,
 484                 HWND hwndOwner, UINT cidl, LPCITEMIDLIST * apidl,
 485                 REFIID riid, UINT * prgfInOut, LPVOID * ppvOut)
 486 {
 487     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 488
 489     LPITEMIDLIST pidl;
 490     IUnknown *pObj = NULL;
 491     HRESULT hr = E_INVALIDARG;
 492
 493     TRACE ("(%p)->(%p,%u,apidl=%p,%s,%p,%p)\n",
 494        This, hwndOwner, cidl, apidl, shdebugstr_guid (riid), prgfInOut, ppvOut);
 495
 496     if (!ppvOut)
 497         return hr;
 498
 499     *ppvOut = NULL;
 500
 501     if (IsEqualIID (riid, &IID_IContextMenu))
 502     {
 503         if (cidl > 0)
 504             pObj = (LPUNKNOWN) ISvItemCm_Constructor( (IShellFolder *) iface, This->pidlRoot, apidl, cidl);
 505         else
 506             pObj = (LPUNKNOWN) ISvBgCm_Constructor( (IShellFolder *) iface, TRUE);
 507         hr = S_OK;
 508     }
 509     else if (IsEqualIID (riid, &IID_IDataObject) && (cidl >= 1))
 510     {
 511         pObj = (LPUNKNOWN) IDataObject_Constructor( hwndOwner,
 512                                                   This->pidlRoot, apidl, cidl);
 513         hr = S_OK;
 514     }
 515     else if (IsEqualIID (riid, &IID_IExtractIconA) && (cidl == 1))
 516     {
 517         pidl = ILCombine (This->pidlRoot, apidl[0]);
 518         pObj = (LPUNKNOWN) IExtractIconA_Constructor (pidl);
 519         SHFree (pidl);
 520         hr = S_OK;
 521     }
 522     else if (IsEqualIID (riid, &IID_IExtractIconW) && (cidl == 1))
 523     {
 524         pidl = ILCombine (This->pidlRoot, apidl[0]);
 525         pObj = (LPUNKNOWN) IExtractIconW_Constructor (pidl);
 526         SHFree (pidl);
 527         hr = S_OK;
 528     }
 529     else if (IsEqualIID (riid, &IID_IDropTarget) && (cidl >= 1))
 530     {
 531         hr = IShellFolder_QueryInterface (iface,
 532                                           &IID_IDropTarget, (LPVOID *) & pObj);
 533     }
 534     else if ((IsEqualIID(riid,&IID_IShellLinkW) ||
 535               IsEqualIID(riid,&IID_IShellLinkA)) && (cidl == 1))
 536     {
 537         pidl = ILCombine (This->pidlRoot, apidl[0]);
 538         hr = IShellLink_ConstructFromFile(NULL, riid, pidl, (LPVOID*)&pObj);
 539         SHFree (pidl);
 540     }
 541     else
 542         hr = E_NOINTERFACE;
 543
 544     if (SUCCEEDED(hr) && !pObj)
 545         hr = E_OUTOFMEMORY;
 546
 547     *ppvOut = pObj;
 548     TRACE ("(%p)->hr=0x%08x\n", This, hr);
 549     return hr;
 550 }
 551
 552 /**************************************************************************
 553  *    ISF_Desktop_fnGetDisplayNameOf
 554  *
 555  * NOTES
 556  *    special case: pidl = null gives desktop-name back
 557  */
 558 static HRESULT WINAPI ISF_Desktop_fnGetDisplayNameOf (IShellFolder2 * iface,
 559                 LPCITEMIDLIST pidl, DWORD dwFlags, LPSTRRET strRet)
 560 {
 561     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 562     HRESULT hr = S_OK;
 563     LPWSTR pszPath;
 564
 565     TRACE ("(%p)->(pidl=%p,0x%08x,%p)\n", This, pidl, dwFlags, strRet);
 566     pdump (pidl);
 567
 568     if (!strRet)
 569         return E_INVALIDARG;
 570
 571     pszPath = CoTaskMemAlloc((MAX_PATH +1) * sizeof(WCHAR));
 572     if (!pszPath)
 573         return E_OUTOFMEMORY;
 574
 575     if (_ILIsDesktop (pidl))
 576     {
 577         if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 578             (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING))
 579             strcpyW(pszPath, This->sPathTarget);
 580         else
 581             HCR_GetClassNameW(&CLSID_ShellDesktop, pszPath, MAX_PATH);
 582     }
 583     else if (_ILIsPidlSimple (pidl))
 584     {
 585         GUID const *clsid;
 586
 587         if ((clsid = _ILGetGUIDPointer (pidl)))
 588         {
 589             if (GET_SHGDN_FOR (dwFlags) & SHGDN_FORPARSING)
 590             {
 591                 int bWantsForParsing;
 592
 593                 /*
 594                  * We can only get a filesystem path from a shellfolder if the
 595                  *  value WantsFORPARSING in CLSID\\{...}\\shellfolder exists.
 596                  *
 597                  * Exception: The MyComputer folder doesn't have this key,
 598                  *   but any other filesystem backed folder it needs it.
 599                  */
 600                 if (IsEqualIID (clsid, &CLSID_MyComputer))
 601                 {
 602                     bWantsForParsing = TRUE;
 603                 }
 604                 else
 605                 {
 606                     /* get the "WantsFORPARSING" flag from the registry */
 607                     static const WCHAR clsidW[] =
 608                      { 'C','L','S','I','D','\\',0 };
 609                     static const WCHAR shellfolderW[] =
 610                      { '\\','s','h','e','l','l','f','o','l','d','e','r',0 };
 611                     static const WCHAR wantsForParsingW[] =
 612                      { 'W','a','n','t','s','F','o','r','P','a','r','s','i','n',
 613                      'g',0 };
 614                     WCHAR szRegPath[100];
 615                     LONG r;
 616
 617                     lstrcpyW (szRegPath, clsidW);
 618                     SHELL32_GUIDToStringW (clsid, &szRegPath[6]);
 619                     lstrcatW (szRegPath, shellfolderW);
 620                     r = SHGetValueW(HKEY_CLASSES_ROOT, szRegPath,
 621                                     wantsForParsingW, NULL, NULL, NULL);
 622                     if (r == ERROR_SUCCESS)
 623                         bWantsForParsing = TRUE;
 624                     else
 625                         bWantsForParsing = FALSE;
 626                 }
 627
 628                 if ((GET_SHGDN_RELATION (dwFlags) == SHGDN_NORMAL) &&
 629                      bWantsForParsing)
 630                 {
 631                     /*
 632                      * we need the filesystem path to the destination folder.
 633                      * Only the folder itself can know it
 634                      */
 635                     hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 636                                                         pszPath,
 637                                                         MAX_PATH);
 638                 }
 639                 else
 640                 {
 641                     /* parsing name like ::{...} */
 642                     pszPath[0] = ':';
 643                     pszPath[1] = ':';
 644                     SHELL32_GUIDToStringW (clsid, &pszPath[2]);
 645                 }
 646             }
 647             else
 648             {
 649                 /* user friendly name */
 650                 HCR_GetClassNameW (clsid, pszPath, MAX_PATH);
 651             }
 652         }
 653         else
 654         {
 655             int cLen = 0;
 656
 657             /* file system folder or file rooted at the desktop */
 658             if ((GET_SHGDN_FOR(dwFlags) == SHGDN_FORPARSING) &&
 659                 (GET_SHGDN_RELATION(dwFlags) != SHGDN_INFOLDER))
 660             {
 661                 lstrcpynW(pszPath, This->sPathTarget, MAX_PATH - 1);
 662                 PathAddBackslashW(pszPath);
 663                 cLen = lstrlenW(pszPath);
 664             }
 665
 666             _ILSimpleGetTextW(pidl, pszPath + cLen, MAX_PATH - cLen);
 667
 668             if (!_ILIsFolder(pidl))
 669                 SHELL_FS_ProcessDisplayFilename(pszPath, dwFlags);
 670         }
 671     }
 672     else
 673     {
 674         /* a complex pidl, let the subfolder do the work */
 675         hr = SHELL32_GetDisplayNameOfChild (iface, pidl, dwFlags,
 676                                             pszPath, MAX_PATH);
 677     }
 678
 679     if (SUCCEEDED(hr))
 680     {
 681         /* Win9x always returns ANSI strings, NT always returns Unicode strings */
 682         if (GetVersion() & 0x80000000)
 683         {
 684             strRet->uType = STRRET_CSTR;
 685             if (!WideCharToMultiByte(CP_ACP, 0, pszPath, -1, strRet->u.cStr, MAX_PATH,
 686                                      NULL, NULL))
 687                 strRet->u.cStr[0] = '\0';
 688             CoTaskMemFree(pszPath);
 689         }
 690         else
 691         {
 692             strRet->uType = STRRET_WSTR;
 693             strRet->u.pOleStr = pszPath;
 694         }
 695     }
 696     else
 697         CoTaskMemFree(pszPath);
 698
 699     TRACE ("-- (%p)->(%s,0x%08x)\n", This,
 700      strRet->uType == STRRET_CSTR ? strRet->u.cStr :
 701      debugstr_w(strRet->u.pOleStr), hr);
 702     return hr;
 703 }
 704
 705 /**************************************************************************
 706  *  ISF_Desktop_fnSetNameOf
 707  *  Changes the name of a file object or subfolder, possibly changing its item
 708  *  identifier in the process.
 709  *
 710  * PARAMETERS
 711  *  HWND          hwndOwner,  //[in ] Owner window for output
 712  *  LPCITEMIDLIST pidl,       //[in ] simple pidl of item to change
 713  *  LPCOLESTR     lpszName,   //[in ] the items new display name
 714  *  DWORD         dwFlags,    //[in ] SHGNO formatting flags
 715  *  LPITEMIDLIST* ppidlOut)   //[out] simple pidl returned
 716  */
 717 static HRESULT WINAPI ISF_Desktop_fnSetNameOf (IShellFolder2 * iface,
 718                 HWND hwndOwner, LPCITEMIDLIST pidl,    /* simple pidl */
 719                 LPCOLESTR lpName, DWORD dwFlags, LPITEMIDLIST * pPidlOut)
 720 {
 721     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 722
 723     FIXME ("(%p)->(%p,pidl=%p,%s,%u,%p)\n", This, hwndOwner, pidl,
 724            debugstr_w (lpName), dwFlags, pPidlOut);
 725
 726     return E_FAIL;
 727 }
 728
 729 static HRESULT WINAPI ISF_Desktop_fnGetDefaultSearchGUID(IShellFolder2 *iface,
 730                 GUID * pguid)
 731 {
 732     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 733
 734     FIXME ("(%p)\n", This);
 735     return E_NOTIMPL;
 736 }
 737
 738 static HRESULT WINAPI ISF_Desktop_fnEnumSearches (IShellFolder2 *iface,
 739                 IEnumExtraSearch ** ppenum)
 740 {
 741     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 742     FIXME ("(%p)\n", This);
 743     return E_NOTIMPL;
 744 }
 745
 746 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumn (IShellFolder2 * iface,
 747                 DWORD dwRes, ULONG * pSort, ULONG * pDisplay)
 748 {
 749     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 750
 751     TRACE ("(%p)\n", This);
 752
 753     if (pSort)
 754         *pSort = 0;
 755     if (pDisplay)
 756         *pDisplay = 0;
 757
 758     return S_OK;
 759 }
 760 static HRESULT WINAPI ISF_Desktop_fnGetDefaultColumnState (
 761                 IShellFolder2 * iface, UINT iColumn, DWORD * pcsFlags)
 762 {
 763     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 764
 765     TRACE ("(%p)\n", This);
 766
 767     if (!pcsFlags || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 768     return E_INVALIDARG;
 769
 770     *pcsFlags = DesktopSFHeader[iColumn].pcsFlags;
 771
 772     return S_OK;
 773 }
 774
 775 static HRESULT WINAPI ISF_Desktop_fnGetDetailsEx (IShellFolder2 * iface,
 776                 LPCITEMIDLIST pidl, const SHCOLUMNID * pscid, VARIANT * pv)
 777 {
 778     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 779     FIXME ("(%p)\n", This);
 780
 781     return E_NOTIMPL;
 782 }
 783
 784 static HRESULT WINAPI ISF_Desktop_fnGetDetailsOf (IShellFolder2 * iface,
 785                 LPCITEMIDLIST pidl, UINT iColumn, SHELLDETAILS * psd)
 786 {
 787     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 788
 789     HRESULT hr = S_OK;
 790
 791     TRACE ("(%p)->(%p %i %p)\n", This, pidl, iColumn, psd);
 792
 793     if (!psd || iColumn >= DESKTOPSHELLVIEWCOLUMNS)
 794         return E_INVALIDARG;
 795
 796     if (!pidl)
 797     {
 798         psd->fmt = DesktopSFHeader[iColumn].fmt;
 799         psd->cxChar = DesktopSFHeader[iColumn].cxChar;
 800         psd->str.uType = STRRET_CSTR;
 801         LoadStringA (shell32_hInstance, DesktopSFHeader[iColumn].colnameid,
 802                      psd->str.u.cStr, MAX_PATH);
 803         return S_OK;
 804     }
 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     IGenericSFImpl *This = (IGenericSFImpl *)iface;
 835     FIXME ("(%p)\n", This);
 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  *    ISF_Desktop_Constructor
 866  */
 867 HRESULT WINAPI ISF_Desktop_Constructor (
 868                 IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 869 {
 870     static IGenericSFImpl *cached_sf;
 871     WCHAR szMyPath[MAX_PATH];
 872
 873     TRACE ("unkOut=%p %s\n", pUnkOuter, shdebugstr_guid (riid));
 874
 875     if (!ppv)
 876         return E_POINTER;
 877     if (pUnkOuter)
 878         return CLASS_E_NOAGGREGATION;
 879
 880     if (!cached_sf)
 881     {
 882         IGenericSFImpl *sf;
 883
 884         if (!SHGetSpecialFolderPathW( 0, szMyPath, CSIDL_DESKTOPDIRECTORY, TRUE ))
 885             return E_UNEXPECTED;
 886
 887         sf = LocalAlloc( LMEM_ZEROINIT, sizeof (IGenericSFImpl) );
 888         if (!sf)
 889             return E_OUTOFMEMORY;
 890
 891         sf->ref = 1;
 892         sf->lpVtbl = &vt_MCFldr_ShellFolder2;
 893         sf->pidlRoot = _ILCreateDesktop();    /* my qualified pidl */
 894         sf->sPathTarget = SHAlloc( (lstrlenW(szMyPath) + 1)*sizeof(WCHAR) );
 895         lstrcpyW( sf->sPathTarget, szMyPath );
 896
 897         if (InterlockedCompareExchangePointer((void *)&cached_sf, sf, NULL) != NULL)
 898         {
 899             /* some other thread already been here */
 900             SHFree( sf->pidlRoot );
 901             SHFree( sf->sPathTarget );
 902             LocalFree( sf );
 903         }
 904     }
 905
 906     return IUnknown_QueryInterface( _IUnknown_(cached_sf), riid, ppv );
 907 }