377 lines
10 KiB
C++
377 lines
10 KiB
C++
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#include "shellprv.h"
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#include "filefldr.h"
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#include "recdocs.h"
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#include "ids.h"
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#include "mtpt.h"
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class CFileSysEnum : public IEnumIDList
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{
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public:
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID riid, void **ppv);
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STDMETHOD_(ULONG,AddRef)();
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STDMETHOD_(ULONG,Release)();
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// IEnumIDList
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STDMETHOD(Next)(ULONG celt, LPITEMIDLIST *rgelt, ULONG *pceltFetched);
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STDMETHOD(Skip)(ULONG celt);
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STDMETHOD(Reset)();
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STDMETHOD(Clone)(IEnumIDList **ppenum);
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CFileSysEnum(CFSFolder *pfsf, HWND hwnd, DWORD grfFlags);
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HRESULT Init();
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private:
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~CFileSysEnum();
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BOOL _FindNextFile();
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void _HideFiles(); // operates on _fd data
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LONG _cRef;
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CFSFolder *_pfsf;
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DWORD _grfFlags;
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HWND _hwnd;
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HANDLE _hfind;
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TCHAR _szFolder[MAX_PATH];
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BOOL _fMoreToEnum;
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WIN32_FIND_DATA _fd;
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int _cHiddenFiles;
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ULONGLONG _cbSize;
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IMruDataList *_pmruRecent;
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int _iIndexMRU;
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BOOL _fShowSuperHidden;
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BOOL _fIsRootDrive;
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BOOL _fIsCDFS;
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};
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CFileSysEnum::CFileSysEnum(CFSFolder *pfsf, HWND hwnd, DWORD grfFlags) :
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_cRef(1), _pfsf(pfsf), _hwnd(hwnd), _grfFlags(grfFlags), _hfind(INVALID_HANDLE_VALUE)
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{
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_fShowSuperHidden = ShowSuperHidden();
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_pfsf->AddRef();
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}
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CFileSysEnum::~CFileSysEnum()
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{
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if (_hfind != INVALID_HANDLE_VALUE)
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{
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// this handle can be the find file or MRU list in the case of RECENTDOCSDIR
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ATOMICRELEASE(_pmruRecent);
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FindClose(_hfind);
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_hfind = INVALID_HANDLE_VALUE;
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}
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_pfsf->Release();
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}
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HRESULT CFileSysEnum::Init()
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{
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TCHAR szPath[MAX_PATH];
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HRESULT hr = _pfsf->_GetPath(_szFolder);
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if (SUCCEEDED(hr) && !PathIsUNC(_szFolder))
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{
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TCHAR szRoot[] = TEXT("A:\\");
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_fIsRootDrive = PathIsRoot(_szFolder);
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// For mapped net drives, register a change
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// notify alias for the corresponding UNC path.
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szRoot[0] = _szFolder[0];
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if (DRIVE_REMOTE == GetDriveType(szRoot))
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{
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MountPoint_RegisterChangeNotifyAlias(DRIVEID(_szFolder));
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}
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TCHAR szFileSystem[6];
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_fIsCDFS = (DRIVE_CDROM == GetDriveType(szRoot)) &&
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GetVolumeInformation(szRoot, NULL, 0, NULL, NULL, NULL, szFileSystem, ARRAYSIZE(szFileSystem)) &&
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(StrCmpI(L"CDFS", szFileSystem) == 0);
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}
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if (SUCCEEDED(hr) &&
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PathCombine(szPath, _szFolder, c_szStarDotStar))
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{
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// let name mapper see the path/PIDL pair (for UNC root mapping)
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// skip the My Net Places entry when passing it to NPTRegisterNameToPidlTranslation.
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LPCITEMIDLIST pidlToMap = _pfsf->_pidlTarget ? _pfsf->_pidlTarget:_pfsf->_pidl;
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if (IsIDListInNameSpace(pidlToMap, &CLSID_NetworkPlaces))
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{
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NPTRegisterNameToPidlTranslation(_szFolder, _ILNext(pidlToMap));
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}
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if (_grfFlags == SHCONTF_FOLDERS)
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{
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// use mask to only find folders, mask is in the hi byte of dwFileAttributes
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// algorithm: (((attrib_on_disk & mask) ^ mask) == 0)
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// signature to tell SHFindFirstFileRetry() to use the attribs specified
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_fd.dwFileAttributes = (FILE_ATTRIBUTE_DIRECTORY << 8) |
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FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
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_fd.dwReserved0 = 0x56504347;
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}
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hr = SHFindFirstFileRetry(_hwnd, NULL, szPath, &_fd, &_hfind, SHPPFW_NONE);
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if (SUCCEEDED(hr))
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{
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_HideFiles();
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ASSERT(hr == S_OK ? (_hfind != INVALID_HANDLE_VALUE) : TRUE);
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_fMoreToEnum = (hr == S_OK);
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if (!(_grfFlags & SHCONTF_INCLUDEHIDDEN))
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{
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if (_pfsf->_IsCSIDL(CSIDL_RECENT))
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{
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CreateRecentMRUList(&_pmruRecent);
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}
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}
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hr = S_OK; // convert S_FALSE to S_OK to match ::EnumObjects() returns
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}
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}
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else if (hr == HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND))
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{
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// Tracking target doesn't exist; return an empty enumerator
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_fMoreToEnum = FALSE;
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hr = S_OK;
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}
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else
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{
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// _GetPathForItem & PathCombine() fail when path is too long
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if (_hwnd)
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{
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ShellMessageBox(HINST_THISDLL, _hwnd, MAKEINTRESOURCE(IDS_ENUMERR_PATHTOOLONG),
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NULL, MB_OK | MB_ICONHAND);
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}
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// This error value tells callers that we have already displayed error UI so skip
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// displaying errors.
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hr = HRESULT_FROM_WIN32(ERROR_CANCELLED);
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}
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return hr;
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}
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STDMETHODIMP CFileSysEnum::QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] = {
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QITABENT(CFileSysEnum, IEnumIDList), // IID_IEnumIDList
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{ 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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STDMETHODIMP_(ULONG) CFileSysEnum::AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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STDMETHODIMP_(ULONG) CFileSysEnum::Release()
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{
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if (InterlockedDecrement(&_cRef))
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return _cRef;
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delete this;
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return 0;
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}
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const LPCWSTR c_rgFilesToHideInRoot[] =
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{
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L"AUTOEXEC.BAT", // case sensitive
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L"CONFIG.SYS",
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L"COMMAND.COM"
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};
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const LPCWSTR c_rgFilesToHideOnCDFS[] =
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{
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L"thumbs.db",
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L"desktop.ini"
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};
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void CFileSysEnum::_HideFiles()
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{
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// only do this if HIDDEN and SYSTEM attributes are not set on the file
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// (we assume if the file has these bits these files are setup properly)
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if (0 == (_fd.dwFileAttributes & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY)))
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{
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// only do this for root drives
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if (_fIsRootDrive)
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{
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for (int i = 0; i < ARRAYSIZE(c_rgFilesToHideInRoot); i++)
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{
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// case sensitive to make it faster
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if (0 == StrCmpC(c_rgFilesToHideInRoot[i], _fd.cFileName))
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{
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_fd.dwFileAttributes |= FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
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break;
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}
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}
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}
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// only do this if we're on a normal CD filesystem
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if (_fIsCDFS)
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{
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for (int i = 0; i < ARRAYSIZE(c_rgFilesToHideOnCDFS); i++)
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{
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// dont share code from above since these can be upper or lower
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if (0 == StrCmpI(c_rgFilesToHideOnCDFS[i], _fd.cFileName))
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{
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_fd.dwFileAttributes |= FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
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break;
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}
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}
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}
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}
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}
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BOOL CFileSysEnum::_FindNextFile()
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{
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BOOL fMoreToEnum = FALSE;
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if (_pmruRecent)
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{
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LPITEMIDLIST pidl;
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while (SUCCEEDED(RecentDocs_Enum(_pmruRecent, _iIndexMRU, &pidl)))
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{
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// confirm that the item stil exists in the file system, fill in the _fd data
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TCHAR szPath[MAX_PATH];
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HANDLE h;
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_pfsf->_GetPathForItem(_pfsf->_IsValidID(pidl), szPath);
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ILFree(pidl);
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h = FindFirstFile(szPath, &_fd);
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if (h != INVALID_HANDLE_VALUE)
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{
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fMoreToEnum = TRUE;
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_iIndexMRU++;
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FindClose(h);
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break;
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}
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else
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{
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//
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// WARNING - if the list is corrupt we torch it - ZekeL 19-JUN-98
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// we could do some special stuff, i guess, to weed out the bad
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// items, but it seems simpler to just blow it away.
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// the only reason this should happen is if somebody
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// has been mushing around with RECENT directory directly,
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// which they shouldnt do since it is hidden...
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//
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// kill this invalid entry, and then try the same index again...
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_pmruRecent->Delete(_iIndexMRU);
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}
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}
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}
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else
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{
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fMoreToEnum = FindNextFile(_hfind, &_fd);
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_HideFiles();
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}
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return fMoreToEnum;
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}
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STDMETHODIMP CFileSysEnum::Next(ULONG celt, LPITEMIDLIST *ppidl, ULONG *pceltFetched)
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{
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HRESULT hr;
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for (; _fMoreToEnum; _fMoreToEnum = _FindNextFile())
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{
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if (_fMoreToEnum == (BOOL)42)
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continue; // we already processed the current item, skip it now
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if (PathIsDotOrDotDot(_fd.cFileName))
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continue;
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if (!(_grfFlags & SHCONTF_STORAGE))
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{
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if (_fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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if (!(_grfFlags & SHCONTF_FOLDERS))
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continue; // item is folder but client does not want folders
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}
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else if (!(_grfFlags & SHCONTF_NONFOLDERS))
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continue; // item is file, but client only wants folders
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// skip hidden and system things unconditionally, don't even count them
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if (!_fShowSuperHidden && IS_SYSTEM_HIDDEN(_fd.dwFileAttributes))
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continue;
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}
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_cbSize += MAKELONGLONG(_fd.nFileSizeLow, _fd.nFileSizeHigh);
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if (!(_grfFlags & (SHCONTF_INCLUDEHIDDEN | SHCONTF_STORAGE)) &&
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(_fd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
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{
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_cHiddenFiles++;
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continue;
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}
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break;
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}
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if (_fMoreToEnum)
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{
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hr = _pfsf->_CreateIDList(&_fd, NULL, ppidl);
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_fMoreToEnum = (BOOL)42; // we have processed the current item, skip it next time
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}
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else
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{
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*ppidl = NULL;
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hr = S_FALSE; // no more items
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// completed the enum, stash some items back into the folder
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// PERF ??: we could QueryService for the view callback at this point and
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// poke these in directly there instead of pushing these into the folder
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_pfsf->_cHiddenFiles = _cHiddenFiles;
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_pfsf->_cbSize = _cbSize;
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}
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if (pceltFetched)
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*pceltFetched = (hr == S_OK) ? 1 : 0;
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return hr;
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}
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STDMETHODIMP CFileSysEnum::Skip(ULONG celt)
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP CFileSysEnum::Reset()
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{
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return S_OK;
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}
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STDMETHODIMP CFileSysEnum::Clone(IEnumIDList **ppenum)
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{
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*ppenum = NULL;
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return E_NOTIMPL;
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}
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STDAPI CFSFolder_CreateEnum(CFSFolder *pfsf, HWND hwnd, DWORD grfFlags, IEnumIDList **ppenum)
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{
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HRESULT hr;
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CFileSysEnum *penum = new CFileSysEnum(pfsf, hwnd, grfFlags);
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if (penum)
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{
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hr = penum->Init();
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if (SUCCEEDED(hr))
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hr = penum->QueryInterface(IID_PPV_ARG(IEnumIDList, ppenum));
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penum->Release();
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}
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else
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{
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hr = E_OUTOFMEMORY;
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*ppenum = NULL;
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}
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return hr;
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}
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