reactos/subsys/system/explorer/shell/shellfs.cpp

   1 /*
   2  * Copyright 2003, 2004, 2005, 2006 Martin Fuchs
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20  //
  21  // Explorer clone
  22  //
  23  // shellfs.cpp
  24  //
  25  // Martin Fuchs, 23.07.2003
  26  //
  27
  28
  29 #include <precomp.h>
  30
  31 //#include "shellfs.h"
  32 //#include "winfs.h"
  33
  34 #include <shlwapi.h>
  35
  36
  37 bool ShellDirectory::fill_w32fdata_shell(LPCITEMIDLIST pidl, SFGAOF attribs, WIN32_FIND_DATA* pw32fdata, BY_HANDLE_FILE_INFORMATION* pbhfi, bool do_access)
  38 {
  39         CONTEXT("ShellDirectory::fill_w32fdata_shell()");
  40
  41         bool bhfi_valid = false;
  42
  43         if (do_access && !( (attribs&SFGAO_FILESYSTEM) && SUCCEEDED(
  44                                 SHGetDataFromIDList(_folder, pidl, SHGDFIL_FINDDATA, pw32fdata, sizeof(WIN32_FIND_DATA))) )) {
  45                 WIN32_FILE_ATTRIBUTE_DATA fad;
  46                 IDataObject* pDataObj;
  47
  48                 STGMEDIUM medium = {0, {0}, 0};
  49                 FORMATETC fmt = {g_Globals._cfStrFName, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
  50
  51                 HRESULT hr = _folder->GetUIObjectOf(0, 1, &pidl, IID_IDataObject, 0, (LPVOID*)&pDataObj);
  52
  53                 if (SUCCEEDED(hr)) {
  54                         hr = pDataObj->GetData(&fmt, &medium);
  55
  56                         pDataObj->Release();
  57
  58                         if (SUCCEEDED(hr)) {
  59                                 LPCTSTR path = (LPCTSTR)GlobalLock(medium.UNION_MEMBER(hGlobal));
  60
  61                                 if (path) {
  62                                          // fill with drive names "C:", ...
  63                                         assert(_tcslen(path) < GlobalSize(medium.UNION_MEMBER(hGlobal)));
  64                                         _tcscpy(pw32fdata->cFileName, path);
  65
  66                                         UINT sem_org = SetErrorMode(SEM_FAILCRITICALERRORS);
  67
  68                                         if (GetFileAttributesEx(path, GetFileExInfoStandard, &fad)) {
  69                                                 pw32fdata->dwFileAttributes = fad.dwFileAttributes;
  70                                                 pw32fdata->ftCreationTime = fad.ftCreationTime;
  71                                                 pw32fdata->ftLastAccessTime = fad.ftLastAccessTime;
  72                                                 pw32fdata->ftLastWriteTime = fad.ftLastWriteTime;
  73
  74                                                 if (!(fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
  75                                                         pw32fdata->nFileSizeLow = fad.nFileSizeLow;
  76                                                         pw32fdata->nFileSizeHigh = fad.nFileSizeHigh;
  77                                                 }
  78                                         }
  79
  80                                         HANDLE hFile = CreateFile(path, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
  81                                                                                                 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
  82
  83                                         if (hFile != INVALID_HANDLE_VALUE) {
  84                                                 if (GetFileInformationByHandle(hFile, pbhfi))
  85                                                         bhfi_valid = true;
  86
  87                                                 CloseHandle(hFile);
  88                                         }
  89
  90                                         SetErrorMode(sem_org);
  91
  92                                         GlobalUnlock(medium.UNION_MEMBER(hGlobal));
  93                                         GlobalFree(medium.UNION_MEMBER(hGlobal));
  94                                 }
  95                         }
  96                 }
  97         }
  98
  99         if (!do_access || !(attribs&SFGAO_FILESYSTEM))  // Archiv files should not be displayed as folders in explorer view.
 100                 if (attribs & (SFGAO_FOLDER|SFGAO_HASSUBFOLDER))
 101                         pw32fdata->dwFileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
 102
 103         if (attribs & SFGAO_READONLY)
 104                 pw32fdata->dwFileAttributes |= FILE_ATTRIBUTE_READONLY;
 105
 106         if (attribs & SFGAO_COMPRESSED)
 107                 pw32fdata->dwFileAttributes |= FILE_ATTRIBUTE_COMPRESSED;
 108
 109         return bhfi_valid;
 110 }
 111
 112
 113 ShellPath ShellEntry::create_absolute_pidl() const
 114 {
 115         CONTEXT("ShellEntry::create_absolute_pidl()");
 116
 117         if (_up)
 118                 if (_up->_etype == ET_SHELL) {
 119                         ShellDirectory* dir = static_cast<ShellDirectory*>(_up);
 120
 121                         if (dir->_pidl->mkid.cb)        // Caching of absolute PIDLs could enhance performance.
 122                                 return _pidl.create_absolute_pidl(dir->create_absolute_pidl());
 123                 } else
 124                         return _pidl.create_absolute_pidl(_up->create_absolute_pidl());
 125
 126         return _pidl;
 127 }
 128
 129
 130  // get full path of a shell entry
 131 bool ShellEntry::get_path(PTSTR path, size_t path_count) const
 132 {
 133         if (!path || path_count==0)
 134                 return false;
 135 /*
 136         path[0] = TEXT('\0');
 137
 138         if (FAILED(path_from_pidl(get_parent_folder(), &*_pidl, path, path_count)))
 139                 return false;
 140 */
 141         FileSysShellPath fs_path(create_absolute_pidl());
 142         LPCTSTR ret = fs_path;
 143
 144         if (ret) {
 145                 lstrcpyn(path, ret, path_count);
 146                 return true;
 147         } else
 148                 return false;
 149 }
 150
 151
 152  // get full path of a shell folder
 153 bool ShellDirectory::get_path(PTSTR path, size_t path_count) const
 154 {
 155         CONTEXT("ShellDirectory::get_path()");
 156
 157         if (!path || path_count==0)
 158                 return false;
 159
 160         path[0] = TEXT('\0');
 161
 162         if (_folder.empty())
 163                 return false;
 164
 165         SFGAOF attribs = SFGAO_FILESYSTEM;
 166
 167         if (FAILED(const_cast<ShellFolder&>(_folder)->GetAttributesOf(1, (LPCITEMIDLIST*)&_pidl, &attribs)))
 168                 return false;
 169
 170         if (!(attribs & SFGAO_FILESYSTEM))
 171                 return false;
 172
 173         if (FAILED(path_from_pidl(get_parent_folder(), &*_pidl, path, path_count)))
 174                 return false;
 175
 176         return true;
 177 }
 178
 179
 180 BOOL ShellEntry::launch_entry(HWND hwnd, UINT nCmdShow)
 181 {
 182         CONTEXT("ShellEntry::launch_entry()");
 183
 184         SHELLEXECUTEINFO shexinfo;
 185
 186         shexinfo.cbSize = sizeof(SHELLEXECUTEINFO);
 187         shexinfo.fMask = SEE_MASK_INVOKEIDLIST; // SEE_MASK_IDLIST is also possible.
 188         shexinfo.hwnd = hwnd;
 189         shexinfo.lpVerb = NULL;
 190         shexinfo.lpFile = NULL;
 191         shexinfo.lpParameters = NULL;
 192         shexinfo.lpDirectory = NULL;
 193         shexinfo.nShow = nCmdShow;
 194
 195         ShellPath shell_path = create_absolute_pidl();
 196         shexinfo.lpIDList = &*shell_path;
 197
 198          // add PIDL to the recent file list
 199         SHAddToRecentDocs(SHARD_PIDL, shexinfo.lpIDList);
 200
 201         BOOL ret = TRUE;
 202
 203         if (!ShellExecuteEx(&shexinfo)) {
 204                 display_error(hwnd, GetLastError());
 205                 ret = FALSE;
 206         }
 207
 208         return ret;
 209 }
 210
 211
 212 HRESULT ShellEntry::do_context_menu(HWND hwnd, LPPOINT pptScreen, CtxMenuInterfaces& cm_ifs)
 213 {
 214         ShellDirectory* dir = static_cast<ShellDirectory*>(_up);
 215
 216         ShellFolder folder = dir? dir->_folder: GetDesktopFolder();
 217         LPCITEMIDLIST pidl = _pidl;
 218
 219         return ShellFolderContextMenu(folder, hwnd, 1, &pidl, pptScreen->x, pptScreen->y, cm_ifs);
 220 }
 221
 222
 223 HRESULT ShellEntry::GetUIObjectOf(HWND hWnd, REFIID riid, LPVOID* ppvOut)
 224 {
 225         LPCITEMIDLIST pidl = _pidl;
 226
 227         return get_parent_folder()->GetUIObjectOf(hWnd, 1, &pidl, riid, NULL, ppvOut);
 228 }
 229
 230
 231 ShellFolder Entry::get_shell_folder() const
 232 {
 233         return ShellFolder(create_absolute_pidl());
 234 }
 235
 236 ShellFolder ShellEntry::get_shell_folder() const
 237 {
 238         return get_parent_folder();
 239 }
 240
 241 ShellFolder ShellDirectory::get_shell_folder() const
 242 {
 243         return _folder;
 244 }
 245
 246
 247 void ShellDirectory::read_directory(int scan_flags)
 248 {
 249         CONTEXT("ShellDirectory::read_directory()");
 250
 251         int level = _level + 1;
 252
 253         Entry* first_entry = NULL;
 254         Entry* last = NULL;
 255
 256         /*if (_folder.empty())
 257                 return;*/
 258
 259 #ifndef _NO_WIN_FS
 260         TCHAR buffer[_MAX_PATH+_MAX_FNAME];
 261
 262         if (!(scan_flags&SCAN_NO_FILESYSTEM) && get_path(buffer, COUNTOF(buffer)) && _tcsncmp(buffer,TEXT("::{"),3)) {
 263                 Entry* entry = NULL;    // eliminate useless GCC warning by initializing entry
 264
 265                 LPTSTR p = buffer + _tcslen(buffer);
 266
 267                 lstrcpy(p, TEXT("\\*"));
 268
 269                 WIN32_FIND_DATA w32fd;
 270                 HANDLE hFind = FindFirstFile(buffer, &w32fd);
 271
 272                 if (hFind != INVALID_HANDLE_VALUE) {
 273                         do {
 274                                  // ignore hidden files (usefull in the start menu)
 275                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
 276                                         continue;
 277
 278                                  // ignore directory entries "." and ".."
 279                                 if ((w32fd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY) &&
 280                                         w32fd.cFileName[0]==TEXT('.') &&
 281                                         (w32fd.cFileName[1]==TEXT('\0') ||
 282                                         (w32fd.cFileName[1]==TEXT('.') && w32fd.cFileName[2]==TEXT('\0'))))
 283                                         continue;
 284
 285                                 lstrcpy(p+1, w32fd.cFileName);
 286
 287                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 288                                         entry = new WinDirectory(this, buffer);
 289                                 else
 290                                         entry = new WinEntry(this);
 291
 292                                 if (!first_entry)
 293                                         first_entry = entry;
 294
 295                                 if (last)
 296                                         last->_next = entry;
 297
 298                                 memcpy(&entry->_data, &w32fd, sizeof(WIN32_FIND_DATA));
 299
 300                                 entry->_level = level;
 301
 302                                 if (!(scan_flags & SCAN_DONT_ACCESS)) {
 303                                         HANDLE hFile = CreateFile(buffer, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
 304                                                                                                 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
 305
 306                                         if (hFile != INVALID_HANDLE_VALUE) {
 307                                                 if (GetFileInformationByHandle(hFile, &entry->_bhfi))
 308                                                         entry->_bhfi_valid = true;
 309
 310                                                 if (ScanNTFSStreams(entry, hFile))
 311                                                         entry->_scanned = true; // There exist named NTFS sub-streams in this file.
 312
 313                                                 CloseHandle(hFile);
 314                                         }
 315                                 }
 316
 317                                  // set file type name
 318                                 LPCTSTR ext = g_Globals._ftype_mgr.set_type(entry);
 319
 320                                 DWORD attribs = SFGAO_FILESYSTEM;
 321
 322                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 323                                         attribs |= SFGAO_FOLDER|SFGAO_HASSUBFOLDER;
 324
 325                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
 326                                         attribs |= SFGAO_READONLY;
 327
 328                                 //if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
 329                                 //      attribs |= SFGAO_HIDDEN;
 330
 331                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)
 332                                         attribs |= SFGAO_COMPRESSED;
 333
 334                                 if (ext && !_tcsicmp(ext, _T(".lnk"))) {
 335                                         attribs |= SFGAO_LINK;
 336                                         w32fd.dwFileAttributes |= ATTRIBUTE_SYMBOLIC_LINK;
 337                                 }
 338
 339                                 entry->_shell_attribs = attribs;
 340
 341                                 if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 342                                         entry->_icon_id = ICID_FOLDER;
 343                                 else if (!(scan_flags & SCAN_DONT_EXTRACT_ICONS))
 344                                         entry->_icon_id = entry->safe_extract_icon();   // Assume small icon, we can extract the large icon later on demand.
 345
 346                                 last = entry;
 347                         } while(FindNextFile(hFind, &w32fd));
 348
 349                         FindClose(hFind);
 350                 }
 351         }
 352         else // SCAN_NO_FILESYSTEM
 353 #endif
 354         {
 355                 ShellItemEnumerator enumerator(_folder, SHCONTF_FOLDERS|SHCONTF_NONFOLDERS|SHCONTF_INCLUDEHIDDEN|SHCONTF_SHAREABLE|SHCONTF_STORAGE);
 356
 357                 TCHAR name[MAX_PATH];
 358                 HRESULT hr_next = S_OK;
 359
 360                 do {
 361 #define FETCH_ITEM_COUNT        32
 362                         LPITEMIDLIST pidls[FETCH_ITEM_COUNT];
 363                         ULONG cnt = 0;
 364
 365                         memset(pidls, 0, sizeof(pidls));
 366
 367                         hr_next = enumerator->Next(FETCH_ITEM_COUNT, pidls, &cnt);
 368
 369                         /* don't break yet now: Registry Explorer Plugin returns E_FAIL!
 370                         if (!SUCCEEDED(hr_next))
 371                                 break; */
 372
 373                         if (hr_next == S_FALSE)
 374                                 break;
 375
 376                         for(ULONG n=0; n<cnt; ++n) {
 377                                 WIN32_FIND_DATA w32fd;
 378                                 BY_HANDLE_FILE_INFORMATION bhfi;
 379                                 bool bhfi_valid = false;
 380
 381                                 memset(&w32fd, 0, sizeof(WIN32_FIND_DATA));
 382
 383                                 SFGAOF attribs_before = ~SFGAO_READONLY & ~SFGAO_VALIDATE;
 384                                 SFGAOF attribs = attribs_before;
 385                                 HRESULT hr = _folder->GetAttributesOf(1, (LPCITEMIDLIST*)&pidls[n], &attribs);
 386                                 bool removeable = false;
 387
 388                                 if (SUCCEEDED(hr) && attribs!=attribs_before) {
 389                                          // avoid accessing floppy drives when browsing "My Computer"
 390                                         if (attribs & SFGAO_REMOVABLE) {
 391                                                 attribs |= SFGAO_HASSUBFOLDER;
 392                                                 removeable = true;
 393                                         } else if (!(scan_flags & SCAN_DONT_ACCESS)) {
 394                                                 DWORD attribs2 = SFGAO_READONLY;
 395
 396                                                 HRESULT hr = _folder->GetAttributesOf(1, (LPCITEMIDLIST*)&pidls[n], &attribs2);
 397
 398                                                 if (SUCCEEDED(hr))
 399                                                         attribs |= attribs2;
 400                                         }
 401                                 } else
 402                                         attribs = 0;
 403
 404                                 bhfi_valid = fill_w32fdata_shell(pidls[n], attribs, &w32fd, &bhfi,
 405                                                                                                  !(scan_flags&SCAN_DONT_ACCESS) && !removeable);
 406
 407                                 try {
 408                                         Entry* entry = NULL;    // eliminate useless GCC warning by initializing entry
 409
 410                                         if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 411                                                 entry = new ShellDirectory(this, pidls[n], _hwnd);
 412                                         else
 413                                                 entry = new ShellEntry(this, pidls[n]);
 414
 415                                         if (!first_entry)
 416                                                 first_entry = entry;
 417
 418                                         if (last)
 419                                                 last->_next = entry;
 420
 421                                         memcpy(&entry->_data, &w32fd, sizeof(WIN32_FIND_DATA));
 422
 423                                         if (bhfi_valid)
 424                                                 memcpy(&entry->_bhfi, &bhfi, sizeof(BY_HANDLE_FILE_INFORMATION));
 425
 426                                         if (SUCCEEDED(name_from_pidl(_folder, pidls[n], name, COUNTOF(name), SHGDN_INFOLDER|0x2000/*0x2000=SHGDN_INCLUDE_NONFILESYS*/))) {
 427                                                 if (!entry->_data.cFileName[0])
 428                                                         _tcscpy(entry->_data.cFileName, name);
 429                                                 else if (_tcscmp(entry->_display_name, name))
 430                                                         entry->_display_name = _tcsdup(name);   // store display name separate from file name; sort display by file name
 431                                         }
 432
 433                                         if (attribs & SFGAO_LINK)
 434                                                 w32fd.dwFileAttributes |= ATTRIBUTE_SYMBOLIC_LINK;
 435
 436                                         entry->_level = level;
 437                                         entry->_shell_attribs = attribs;
 438                                         entry->_bhfi_valid = bhfi_valid;
 439
 440                                          // set file type name
 441                                         g_Globals._ftype_mgr.set_type(entry);
 442
 443                                          // get icons for files and virtual objects
 444                                         if (!(entry->_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ||
 445                                                 !(attribs & SFGAO_FILESYSTEM)) {
 446                                                 if (!(scan_flags & SCAN_DONT_EXTRACT_ICONS))
 447                                                         entry->_icon_id = entry->safe_extract_icon();   // Assume small icon, we can extract the large icon later on demand.
 448                                         } else if (entry->_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 449                                                 entry->_icon_id = ICID_FOLDER;
 450                                         else
 451                                                 entry->_icon_id = ICID_NONE;    // don't try again later
 452
 453                                         last = entry;
 454                                 } catch(COMException& e) {
 455                                         HandleException(e, _hwnd);
 456                                 }
 457                         }
 458                 } while(SUCCEEDED(hr_next));
 459         }
 460
 461         if (last)
 462                 last->_next = NULL;
 463
 464         _down = first_entry;
 465         _scanned = true;
 466 }
 467
 468 const void* ShellDirectory::get_next_path_component(const void* p) const
 469 {
 470         LPITEMIDLIST pidl = (LPITEMIDLIST)p;
 471
 472         if (!pidl || !pidl->mkid.cb)
 473                 return NULL;
 474
 475          // go to next element
 476         pidl = (LPITEMIDLIST)((LPBYTE)pidl+pidl->mkid.cb);
 477
 478         return pidl;
 479 }
 480
 481 Entry* ShellDirectory::find_entry(const void* p)
 482 {
 483         LPITEMIDLIST pidl = (LPITEMIDLIST) p;
 484
 485          // handle special case of empty trailing id list entry
 486         if (!pidl->mkid.cb)
 487                 return this;
 488
 489         for(Entry*entry=_down; entry; entry=entry->_next)
 490                 if (entry->_etype == ET_SHELL) {
 491                         ShellEntry* se = static_cast<ShellEntry*>(entry);
 492
 493                         if (se->_pidl && se->_pidl->mkid.cb==pidl->mkid.cb && !memcmp(se->_pidl, pidl, se->_pidl->mkid.cb))
 494                                 return entry;
 495                 } else {
 496                         const ShellPath& sp = entry->create_absolute_pidl();
 497                         static DynamicFct<LPITEMIDLIST(WINAPI*)(LPCITEMIDLIST)> ILFindLastID(TEXT("SHELL32"), "ILFindLastID");
 498
 499                         if (ILFindLastID) {
 500                                 LPCITEMIDLIST entry_pidl = (*ILFindLastID)(sp);
 501
 502                                 if (entry_pidl && entry_pidl->mkid.cb==pidl->mkid.cb && !memcmp(entry_pidl, pidl, entry_pidl->mkid.cb))
 503                                         return entry;
 504                         }
 505                 }
 506
 507         return NULL;
 508 }
 509
 510 int ShellDirectory::extract_icons(ICONCACHE_FLAGS flags)
 511 {
 512         int cnt = 0;
 513
 514         for(Entry*entry=_down; entry; entry=entry->_next)
 515                 if (entry->_icon_id == ICID_UNKNOWN) {
 516                         entry->_icon_id = entry->extract_icon(flags);
 517
 518                         if (entry->_icon_id != ICID_NONE)
 519                                 ++cnt;
 520                 }
 521
 522         return cnt;
 523 }