CDesktopUpgradePropertyBag Class Reference

Inheritance diagram for CDesktopUpgradePropertyBag:

Collaboration diagram for CDesktopUpgradePropertyBag:

Public Member Functions
	CDesktopUpgradePropertyBag ()
STDMETHODIMP	Read (_In_z_ LPCWSTR pszPropName, _Inout_ VARIANT *pvari, _Inout_opt_ IErrorLog *pErrorLog) override
STDMETHODIMP	Write (_In_z_ LPCWSTR pszPropName, _In_ VARIANT *pvari) override
Public Member Functions inherited from CBasePropertyBag
	CBasePropertyBag (DWORD dwMode)
virtual	~CBasePropertyBag ()
STDMETHODIMP	QueryInterface (REFIID riid, void **ppvObject) override
	STDMETHODIMP_ (ULONG) AddRef() override
	STDMETHODIMP_ (ULONG) Release() override
Public Member Functions inherited from IPropertyBag
HRESULT	Read ([in] LPCOLESTR pszPropName, [in, out] VARIANT *pVar, [in] IErrorLog *pErrorLog)
HRESULT	RemoteRead ([in] LPCOLESTR pszPropName, [out] VARIANT *pVar, [in] IErrorLog *pErrorLog, [in] DWORD varType, [in] IUnknown *pUnkObj)
HRESULT	Write ([in] LPCOLESTR pszPropName, [in] VARIANT *pVar)
Public Member Functions inherited from IUnknown
HRESULT	QueryInterface ([in] REFIID riid, [out, iid_is(riid)] void **ppvObject)
ULONG	AddRef ()
ULONG	Release ()

Protected Member Functions
BOOL	_AlreadyUpgraded (HKEY hKey)
VOID	_MarkAsUpgraded (HKEY hkey)
HRESULT	_ReadFlags (VARIANT *pvari)
HRESULT	_ReadItemPositions (VARIANT *pvari)
IStream *	_GetOldDesktopViewStream ()
IStream *	_NewStreamFromOld (IStream *pOldStream)

Additional Inherited Members
Public Types inherited from IPropertyBag
typedef IPropertyBag *	LPPROPERTYBAG
Public Types inherited from IUnknown
typedef IUnknown *	LPUNKNOWN
Protected Attributes inherited from CBasePropertyBag
LONG	m_cRefs
DWORD	m_dwMode

Detailed Description

Definition at line 1010 of file propbag.cpp.

Constructor & Destructor Documentation

CDesktopUpgradePropertyBag()

CDesktopUpgradePropertyBag::CDesktopUpgradePropertyBag ( )

inline

Definition at line 1021 of file propbag.cpp.

: CBasePropertyBag(STGM_READ) { }

Member Function Documentation

_AlreadyUpgraded()

BOOL CDesktopUpgradePropertyBag::_AlreadyUpgraded ( HKEY  hKey )

protected

Definition at line 1041 of file propbag.cpp.

{
    // Check the existence of the value written in _MarkAsUpgraded.
    DWORD dwValue, cbData = sizeof(dwValue);
    return SHGetValueW(hKey, NULL, L"Upgrade", NULL, &dwValue, &cbData) == ERROR_SUCCESS;
}

Referenced by _GetOldDesktopViewStream().

_GetOldDesktopViewStream()

IStream * CDesktopUpgradePropertyBag::_GetOldDesktopViewStream ( )

protected

Definition at line 1116 of file propbag.cpp.

{
    HKEY hKey = SHGetShellKey(SHKEY_Root_HKCU, L"Streams\\Desktop", FALSE);
    if (!hKey)
        return NULL;
 
    CComPtr<IStream> pOldStream;
    if (!_AlreadyUpgraded(hKey))
    {
        pOldStream.Attach(SHOpenRegStream2W(hKey, NULL, L"ViewView2", 0));
        if (pOldStream)
        {
            ULARGE_INTEGER uli;
            HRESULT hr = IStream_Size(pOldStream, &uli);
            if (SUCCEEDED(hr) && !uli.QuadPart)
                pOldStream.Release();
        }
 
        if (!pOldStream)
            pOldStream.Attach(SHOpenRegStream2W(hKey, NULL, L"ViewView", 0));
 
        _MarkAsUpgraded(hKey);
    }
 
    ::RegCloseKey(hKey);
    return pOldStream.Detach();
}

Referenced by _ReadItemPositions().

_MarkAsUpgraded()

VOID CDesktopUpgradePropertyBag::_MarkAsUpgraded ( HKEY  hkey )

protected

Definition at line 1035 of file propbag.cpp.

{
    DWORD dwValue = TRUE;
    SHSetValueW(hkey, NULL, L"Upgrade", REG_DWORD, &dwValue, sizeof(dwValue));
}

Referenced by _GetOldDesktopViewStream().

_NewStreamFromOld()

IStream * CDesktopUpgradePropertyBag::_NewStreamFromOld ( IStream *  pOldStream )

protected

Definition at line 1076 of file propbag.cpp.

{
    OLD_STREAM_HEADER Header;
    HRESULT hr = pOldStream->Read(&Header, sizeof(Header), NULL);
    if (FAILED(hr) || Header.wMagic != 28)
        return NULL;
 
    // Move stream pointer
    LARGE_INTEGER li;
    li.QuadPart = Header.wSize - sizeof(Header);
    hr = pOldStream->Seek(li, STREAM_SEEK_CUR, NULL);
    if (FAILED(hr))
        return NULL;
 
    // Get the size
    ULARGE_INTEGER uli;
    hr = IStream_Size(pOldStream, &uli);
    if (FAILED(hr))
        return NULL;
 
    // Create new stream and attach
    CComPtr<IStream> pNewStream;
    pNewStream.Attach(SHCreateMemStream(NULL, 0));
    if (!pNewStream)
        return NULL;
 
    // Subtract Header.wSize from the size
    uli.QuadPart -= Header.wSize;
 
    // Copy to pNewStream
    hr = pOldStream->CopyTo(pNewStream, uli, NULL, NULL);
    if (FAILED(hr))
        return NULL;
 
    li.QuadPart = 0;
    pNewStream->Seek(li, STREAM_SEEK_SET, NULL);
 
    return pNewStream.Detach();
}

Referenced by _ReadItemPositions().

_ReadFlags()

HRESULT CDesktopUpgradePropertyBag::_ReadFlags ( VARIANT *  pvari )

protected

Definition at line 1050 of file propbag.cpp.

{
    DESKVIEW_FLAGS Flags;
    DWORD cbValue = sizeof(Flags);
    if (SHGetValueW(HKEY_CURRENT_USER,
                    L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\DeskView",
                    L"Settings",
                    NULL,
                    &Flags,
                    &cbValue) != ERROR_SUCCESS || cbValue < sizeof(Flags))
    {
        return E_FAIL;
    }
 
    V_UINT(pvari) = ((UINT)(Flags >> 32)) | 0x220; // FIXME: Magic number
    V_VT(pvari) = VT_UINT;
    return S_OK;
}

Referenced by Read().

_ReadItemPositions()

HRESULT CDesktopUpgradePropertyBag::_ReadItemPositions ( VARIANT *  pvari )

protected

Definition at line 1144 of file propbag.cpp.

{
    CComPtr<IStream> pOldStream;
    pOldStream.Attach(_GetOldDesktopViewStream());
    if (!pOldStream)
        return E_FAIL;
 
    HRESULT hr = E_FAIL;
    IStream *pNewStream = _NewStreamFromOld(pOldStream);
    if (pNewStream)
    {
        V_UNKNOWN(pvari) = pNewStream;
        V_VT(pvari) = VT_UNKNOWN;
        hr = S_OK;
    }
 
    return hr;
}

Referenced by Read().

Read()

STDMETHODIMP CDesktopUpgradePropertyBag::Read ( _In_z_ LPCWSTR  pszPropName, _Inout_ VARIANT *  pvari, _Inout_opt_ IErrorLog *  pErrorLog  )

override

Definition at line 1164 of file propbag.cpp.

{
    UNREFERENCED_PARAMETER(pErrorLog);
 
    VARTYPE vt = V_VT(pvari);
 
    HRESULT hr = E_FAIL;
    if (StrCmpW(L"FFlags", pszPropName) == 0)
        hr = _ReadFlags(pvari);
    else if (StrCmpNW(L"ItemPos", pszPropName, 7) == 0)
        hr = _ReadItemPositions(pvari);
 
    if (FAILED(hr))
    {
        ::VariantInit(pvari);
        return hr;
    }
 
    return ::VariantChangeType(pvari, pvari, 0, vt);
}

Write()

STDMETHODIMP CDesktopUpgradePropertyBag::Write ( _In_z_ LPCWSTR  pszPropName, _In_ VARIANT *  pvari  )

inlineoverride

Definition at line 1028 of file propbag.cpp.

    {
        ERR("%p: %s: Read-only\n", this, debugstr_w(pszPropName));
        return E_NOTIMPL;
    }

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The documentation for this class was generated from the following file:

• dll/win32/shlwapi/propbag.cpp