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///////////////////////////////////////////////////////////////////////////////
/* File: extinit.cpp
Description: Implements IShellExtInit for disk quota shell extensions.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/15/96 Initial creation. BrianAu*////////////////////////////////////////////////////////////////////////////////
#include "pch.h" // PCH
#pragma hdrstop
#include "extinit.h"
#include "prshtext.h"
#include "volprop.h"
#include "guidsp.h"
///////////////////////////////////////////////////////////////////////////////
/* Function: ShellExtInit::QueryInterface
Description: Returns an interface pointer to the object's IUnknown or IShellExtInit interface. Only IID_IUnknown and IID_IShellExtInit are recognized.
Arguments: riid - Reference to requested interface ID.
ppvOut - Address of interface pointer variable to accept interface ptr.
Returns: NO_ERROR - Success. E_NOINTERFACE - Requested interface not supported. E_INVALIDARG - ppvOut argument was NULL.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/15/96 Initial creation. BrianAu 06/25/98 Disabled MMC snapin code. BrianAu*////////////////////////////////////////////////////////////////////////////////
STDMETHODIMPShellExtInit::QueryInterface( REFIID riid, LPVOID *ppvOut ){ HRESULT hResult = E_NOINTERFACE;
if (NULL == ppvOut) return E_INVALIDARG;
*ppvOut = NULL;
try { if (IID_IUnknown == riid || IID_IShellExtInit == riid) { *ppvOut = this; ((LPUNKNOWN)*ppvOut)->AddRef(); hResult = NOERROR; } else if (IID_IShellPropSheetExt == riid) { //
// This can throw OutOfMemory.
//
hResult = Create_IShellPropSheetExt(riid, ppvOut); } } catch(CAllocException& e) { hResult = E_OUTOFMEMORY; }
return hResult;}
///////////////////////////////////////////////////////////////////////////////
/* Function: ShellExtInit::AddRef
Description: Increments object reference count.
Arguments: None.
Returns: New reference count value.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/15/96 Initial creation. BrianAu*////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP_(ULONG)ShellExtInit::AddRef( VOID ){ ULONG cRef = InterlockedIncrement(&m_cRef); DBGPRINT((DM_COM, DL_HIGH, TEXT("ShellExtInit::AddRef, 0x%08X %d -> %d\n"), this, cRef - 1, cRef )); return cRef;}
///////////////////////////////////////////////////////////////////////////////
/* Function: ShellExtInit::Release
Description: Decrements object reference count. If count drops to 0, object is deleted.
Arguments: None.
Returns: New reference count value.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/15/96 Initial creation. BrianAu*////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP_(ULONG)ShellExtInit::Release( VOID ){ ASSERT( 0 != m_cRef ); ULONG cRef = InterlockedDecrement(&m_cRef);
DBGPRINT((DM_COM, DL_HIGH, TEXT("ShellExtInit::Release, 0x%08X %d -> %d\n"), this, cRef + 1, cRef ));
if ( 0 == cRef ) { delete this; } return cRef;}
///////////////////////////////////////////////////////////////////////////////
/* Function: ShellExtInit::Initialize
Description: Called by the shell to initialize the shell extension.
Arguments: pidlFolder - Pointer to IDL of selected folder. This NULL for property sheet and context menu extensions.
lpDataObj - Pointer to data object containing list of selected objects.
hkeyProgID - Registry key for the file object or folder type.
Returns: S_OK - Success. E_FAIL - Can't initialize extension.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/15/96 Initial creation. BrianAu 06/28/98 Added mounted-volume support. BrianAu Includes introduction of CVolumeID object.*////////////////////////////////////////////////////////////////////////////////
STDMETHODIMPShellExtInit::Initialize( LPCITEMIDLIST pidlFolder, LPDATAOBJECT lpDataObj, HKEY hkeyProgID){ HRESULT hResult = E_FAIL; if (NULL != lpDataObj) { //
// First assume it's a normal volume ID (i.e. "C:\").
// The DataObject will provide CF_HDROP if it is.
//
FORMATETC fe = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL }; STGMEDIUM medium; bool bMountedVol = false;
hResult = lpDataObj->GetData(&fe, &medium); if (FAILED(hResult)) { //
// Isn't a normal volume name. Maybe it's a mounted volume.
// Mounted volume names come in on a different clipboard format
// so we can treat them differently from normal volume
// names like "C:\". A mounted volume name will be the path
// to the folder hosting the mounted volume.
// For mounted volumes, the DataObject provides CF "MountedVolume".
//
fe.cfFormat = (CLIPFORMAT)RegisterClipboardFormat(CFSTR_MOUNTEDVOLUME); hResult = lpDataObj->GetData(&fe, &medium); bMountedVol = SUCCEEDED(hResult); }
if (SUCCEEDED(hResult)) { if (1 == DragQueryFile((HDROP)medium.hGlobal, (DWORD)-1, NULL, 0)) { //
// Retrieve volume ID string passed in from the shell.
//
CString strForParsing; // Used for calling Win32 functions.
CString strForDisplay; // Used for UI display.
CString strFSPath; // Used when an FS path is required.
DragQueryFile((HDROP)medium.hGlobal, 0, strForParsing.GetBuffer(MAX_PATH), MAX_PATH); strForParsing.ReleaseBuffer();
if (!bMountedVol) { //
// If it's a normal volume name like "C:\", just
// use that as the display name and FS Path also.
//
strFSPath = strForDisplay = strForParsing; } else { //
// It's a mounted volume so we need to come up with something
// better than "\\?\Volume{ <guid> }\" to display.
//
// The UI spec says the name shall be like this:
//
// <label> (<mounted path>)
//
TCHAR szMountPtGUID[MAX_PATH] = { TEXT('\0') }; GetVolumeNameForVolumeMountPoint(strForParsing, szMountPtGUID, ARRAYSIZE(szMountPtGUID));
TCHAR szLabel[MAX_VOL_LABEL] = { TEXT('\0') }; GetVolumeInformation(szMountPtGUID, szLabel, ARRAYSIZE(szLabel), NULL, NULL, NULL, NULL, 0); //
// Format display name as:
//
// "VOL_LABEL (C:\MountDir)" or
// "(C:\MountDir)" if no volume label is available.
//
// First remove any trailing backslash from the original parsing
// string. It was needed for the call to get the volume mount
// point but we don't want to display it in the UI.
//
if (!strForParsing.IsEmpty()) { int iLastBS = strForParsing.Last(TEXT('\\')); if (iLastBS == strForParsing.Length() - 1) strForParsing = strForParsing.SubString(0, iLastBS); } strForDisplay.Format(g_hInstDll, IDS_FMT_MOUNTEDVOL_DISPLAYNAME, szLabel, strForParsing.Cstr()); //
// Remember the "C:\MountDir" form as the "FSPath".
//
strFSPath = strForParsing; //
// From here on out, the mounted volume GUID string
// is used for parsing.
//
strForParsing = szMountPtGUID; }
//
// Store the parsing and display name strings in our CVolumeID
// object for convenient packaging. This way we can pass around
// one object and the various parts of the UI can use either the
// parsable or displayable name as they see fit. Since the
// CString objects are reference-counted, all the copying doesn't
// result in duplication of the actual string contents.
//
m_idVolume.SetNames(strForParsing, strForDisplay, strFSPath);
hResult = S_OK; } ReleaseStgMedium(&medium); } }
return hResult;}
///////////////////////////////////////////////////////////////////////////////
/* Function: ShellExtInit::Create_IShellPropSheetExt
Description: Creates a shell property sheet extension object and returns a pointer to it's IShellPropSheetExt interface.
Arguments: riid - Reference to interface IID.
ppvOut - Address of interface pointer variable to receive interface pointer.
Returns: NO_ERROR - Success. E_FAIL - Extension initialized with something other than the name of a volume or directory. - OR - The volume or directory doesn't support quotas.
Exceptions: OutOfMemory.
Revision History:
Date Description Programmer -------- --------------------------------------------------- ---------- 08/16/96 Initial creation. BrianAu 10/07/97 Removed "access denied" and "invalid FS Ver" msgs BrianAu from prop sheet page. Only display page if volume supports quotas and quota control object can be initialized.*////////////////////////////////////////////////////////////////////////////////
HRESULTShellExtInit::Create_IShellPropSheetExt( REFIID riid, LPVOID *ppvOut ){ HRESULT hResult = E_FAIL; DWORD dwFileSysFlags = 0; TCHAR szFileSysName[MAX_PATH];
if (GetVolumeInformation(m_idVolume.ForParsing(), // Volume id str [in]
NULL, 0, // Don't want volume name
NULL, // Don't want serial no.
NULL, // Don't want max comp length.
&dwFileSysFlags, // File system flags.
szFileSysName, ARRAYSIZE(szFileSysName))) { //
// Only continue if the volume supports quotas.
//
if (0 != (dwFileSysFlags & FILE_VOLUME_QUOTAS)) { DiskQuotaPropSheetExt *pSheetExt = NULL; try { pSheetExt = new VolumePropPage;
//
// This can throw OutOfMemory.
//
hResult = pSheetExt->Initialize(m_idVolume, IDD_PROPPAGE_VOLQUOTA, VolumePropPage::DlgProc); if (SUCCEEDED(hResult)) { hResult = pSheetExt->QueryInterface(riid, ppvOut); } } catch(CAllocException& e) { hResult = E_OUTOFMEMORY; } if (FAILED(hResult)) { delete pSheetExt; *ppvOut = NULL; } } }
return hResult;}
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