shlfolder.c

winNT技术操作系统,国外开放的原代码和LIUX一样

    *ppvOut = NULL;

    pidlChild = ILCloneFirst (pidlComplete);

    if ((clsid = _ILGetGUIDPointer (pidlChild))) {
        /* virtual folder */
        hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, clsid, &IID_IShellFolder, (LPVOID *) & pSF);
    } else {
        /* file system folder */
        CLSID clsidFolder = CLSID_ShellFSFolder;
        static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
        WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
       
        /* see if folder CLSID should be overridden by desktop.ini file */
        if (pathRoot) {
            lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
            pwszPathTail = PathAddBackslashW(wszFolderPath);
        }
        MultiByteToWideChar(CP_ACP, 0, _ILGetTextPointer(pidlChild), -1, pwszPathTail, MAX_PATH - (int)(pwszPathTail - wszFolderPath));
        if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
            wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
            CLSIDFromString (wszCLSIDValue, &clsidFolder);

		hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
            &clsidFolder, &IID_IShellFolder, (LPVOID *)&pSF);
    }
    ILFree (pidlChild);

    if (SUCCEEDED (hr)) {
        if (_ILIsPidlSimple (pidlComplete)) {
            /* no sub folders */
            hr = IShellFolder_QueryInterface (pSF, riid, ppvOut);
        } else {
            /* go deeper */
            hr = IShellFolder_BindToObject (pSF, ILGetNext (pidlComplete), NULL, riid, ppvOut);
        }
        IShellFolder_Release (pSF);
    }

    TRACE ("-- returning (%p) %08lx\n", *ppvOut, hr);

    return hr;
}

/***********************************************************************
 *	SHELL32_GetDisplayNameOfChild
 *
 * Retrives the display name of a child object of a shellfolder.
 *
 * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 * - it binds to the child shellfolder [subpidl1]
 * - asks it for the displayname of [subpidl2][subpidl3]
 *
 * Is possible the pidl is a simple pidl. In this case it asks the
 * subfolder for the displayname of an empty pidl. The subfolder
 * returns the own displayname eg. "::{guid}". This is used for
 * virtual folders with the registry key WantsFORPARSING set.
 */
HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
				       LPCITEMIDLIST pidl, DWORD dwFlags, LPSTR szOut, DWORD dwOutLen)
{
    LPITEMIDLIST pidlFirst;
    HRESULT hr = E_INVALIDARG;

    TRACE ("(%p)->(pidl=%p 0x%08lx %p 0x%08lx)\n", psf, pidl, dwFlags, szOut, dwOutLen);
    pdump (pidl);

    pidlFirst = ILCloneFirst (pidl);
    if (pidlFirst) {
	IShellFolder2 *psfChild;

	hr = IShellFolder_BindToObject (psf, pidlFirst, NULL, &IID_IShellFolder, (LPVOID *) & psfChild);
	if (SUCCEEDED (hr)) {
	    STRRET strTemp;
	    LPITEMIDLIST pidlNext = ILGetNext (pidl);

	    hr = IShellFolder_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
	    if (SUCCEEDED (hr)) {
		hr = StrRetToStrNA (szOut, dwOutLen, &strTemp, pidlNext);
	    }
	    IShellFolder_Release (psfChild);
	}
	ILFree (pidlFirst);
    } else
	hr = E_OUTOFMEMORY;

    TRACE ("-- ret=0x%08lx %s\n", hr, szOut);

    return hr;
}

/***********************************************************************
 *  SHELL32_GetItemAttributes
 *
 * NOTES
 * observerd values:
 *  folder:	0xE0000177	FILESYSTEM | HASSUBFOLDER | FOLDER
 *  file:	0x40000177	FILESYSTEM
 *  drive:	0xf0000144	FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 *  mycomputer:	0xb0000154	HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 *  (seems to be default for shell extensions if no registry entry exists)
 *
 * win2k:
 *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 *  file:      0x40400177      FILESYSTEM | CANMONIKER
 *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 *
 * This function does not set flags!! It only resets flags when necessary.
 */
HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
{
    DWORD dwAttributes;
    static const DWORD dwSupportedAttr=
                          SFGAO_CANCOPY |           /*0x00000001 */
                          SFGAO_CANMOVE |           /*0x00000002 */
                          SFGAO_CANLINK |           /*0x00000004 */
                          SFGAO_CANRENAME |         /*0x00000010 */
                          SFGAO_CANDELETE |         /*0x00000020 */
                          SFGAO_HASPROPSHEET |      /*0x00000040 */
                          SFGAO_DROPTARGET |        /*0x00000100 */
                          SFGAO_LINK |              /*0x00010000 */
                          SFGAO_READONLY |          /*0x00040000 */
                          SFGAO_HIDDEN |            /*0x00080000 */
                          SFGAO_FILESYSANCESTOR |   /*0x10000000 */
                          SFGAO_FOLDER |            /*0x20000000 */
                          SFGAO_FILESYSTEM |        /*0x40000000 */
                          SFGAO_HASSUBFOLDER;       /*0x80000000 */
    
    TRACE ("0x%08lx\n", *pdwAttributes);

    if (*pdwAttributes & ~dwSupportedAttr)
    {
        WARN ("attributes 0x%08lx not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
        *pdwAttributes &= dwSupportedAttr;
    }

    dwAttributes = *pdwAttributes;

    if (_ILIsDrive (pidl)) {
        *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FILESYSTEM|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|
	    SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANLINK;
    } else if (_ILGetGUIDPointer (pidl) && HCR_GetFolderAttributes(pidl, &dwAttributes)) {
	*pdwAttributes = dwAttributes;
    } else if (_ILGetDataPointer (pidl)) {
	dwAttributes = _ILGetFileAttributes (pidl, NULL, 0);

        /* Set common attributes */
        *pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE | 
                          SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;

	if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
	    *pdwAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
	else
	    *pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);

	if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
	    *pdwAttributes |=  SFGAO_HIDDEN;
	else
	    *pdwAttributes &= ~SFGAO_HIDDEN;

	if (dwAttributes & FILE_ATTRIBUTE_READONLY)
	    *pdwAttributes |=  SFGAO_READONLY;
	else
	    *pdwAttributes &= ~SFGAO_READONLY;

	if (SFGAO_LINK & *pdwAttributes) {
	    char ext[MAX_PATH];

	    if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
		*pdwAttributes &= ~SFGAO_LINK;
	}

	if (SFGAO_HASSUBFOLDER & *pdwAttributes)
	{
	    IShellFolder *psf2;
	    if (SUCCEEDED(IShellFolder_BindToObject(psf, pidl, 0, (REFIID)&IID_IShellFolder, (LPVOID *)&psf2)))
	    {
	        IEnumIDList	*pEnumIL = NULL;
	        if (SUCCEEDED(IShellFolder_EnumObjects(psf2, 0, SHCONTF_FOLDERS, &pEnumIL)))
	        {
	            if (IEnumIDList_Skip(pEnumIL, 1) != S_OK)
	                *pdwAttributes &= ~SFGAO_HASSUBFOLDER;
	            IEnumIDList_Release(pEnumIL);
	        }
	        IShellFolder_Release(psf2);
	    }
	}
    } else {
	*pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
    }
    TRACE ("-- 0x%08lx\n", *pdwAttributes);
    return S_OK;
}

/***********************************************************************
 *  SHELL32_CompareIDs
 */
HRESULT SHELL32_CompareIDs (IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
{
    int type1,
      type2;
    char szTemp1[MAX_PATH];
    char szTemp2[MAX_PATH];
    HRESULT nReturn;
    LPITEMIDLIST firstpidl,
      nextpidl1,
      nextpidl2;
    IShellFolder *psf;

    /* test for empty pidls */
    BOOL isEmpty1 = _ILIsDesktop (pidl1);
    BOOL isEmpty2 = _ILIsDesktop (pidl2);

    if (isEmpty1 && isEmpty2)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
    if (isEmpty1)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
    if (isEmpty2)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );

    /* test for different types. Sort order is the PT_* constant */
    type1 = _ILGetDataPointer (pidl1)->type;
    type2 = _ILGetDataPointer (pidl2)->type;
    if (type1 < type2)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
    else if (type1 > type2)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );

    /* test for name of pidl */
    _ILSimpleGetText (pidl1, szTemp1, MAX_PATH);
    _ILSimpleGetText (pidl2, szTemp2, MAX_PATH);
    nReturn = lstrcmpiA (szTemp1, szTemp2);
    if (nReturn < 0)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
    else if (nReturn > 0)
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );

    /* test of complex pidls */
    firstpidl = ILCloneFirst (pidl1);
    nextpidl1 = ILGetNext (pidl1);
    nextpidl2 = ILGetNext (pidl2);

    /* optimizing: test special cases and bind not deeper */
    /* the deeper shellfolder would do the same */
    isEmpty1 = _ILIsDesktop (nextpidl1);
    isEmpty2 = _ILIsDesktop (nextpidl2);

    if (isEmpty1 && isEmpty2) {
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
    } else if (isEmpty1) {
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
    } else if (isEmpty2) {
        return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
    /* optimizing end */
    } else if (SUCCEEDED (IShellFolder_BindToObject (iface, firstpidl, NULL, &IID_IShellFolder, (LPVOID *) & psf))) {
	nReturn = IShellFolder_CompareIDs (psf, lParam, nextpidl1, nextpidl2);
	IShellFolder_Release (psf);
    }
    ILFree (firstpidl);
    return nReturn;
}

/***********************************************************************
 *  SHCreateLinks
 *
 *   Undocumented.
 */
HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, LPDATAOBJECT lpDataObject,
                              UINT uFlags, LPITEMIDLIST *lppidlLinks)
{
    FIXME("%p %s %p %08x %p\n",hWnd,lpszDir,lpDataObject,uFlags,lppidlLinks);
    return E_NOTIMPL;
}