brsfolder.c

winNT技术操作系统,国外开放的原代码和LIUX一样

        if (FAILED(r) || 
            ((dwAttributes & (SFGAO_FOLDER|SFGAO_FILESYSTEM)) != (SFGAO_FOLDER|SFGAO_FILESYSTEM)))
        {
            bEnabled = FALSE;
        }
    }
    SendMessageW(info->hWnd, BFFM_ENABLEOK, 0, (LPARAM)bEnabled);
}

static LRESULT BrsFolder_Treeview_Delete( browse_info *info, NMTREEVIEWW *pnmtv )
{
    LPTV_ITEMDATA lptvid = (LPTV_ITEMDATA)pnmtv->itemOld.lParam;

    TRACE("TVN_DELETEITEMA/W %p\n", lptvid);

    IShellFolder_Release(lptvid->lpsfParent);
    if (lptvid->pEnumIL)
        IEnumIDList_Release(lptvid->pEnumIL);
    SHFree(lptvid->lpi);
    SHFree(lptvid->lpifq);
    SHFree(lptvid);
    return 0;
}

static LRESULT BrsFolder_Treeview_Expand( browse_info *info, NMTREEVIEWW *pnmtv )
{
    IShellFolder *lpsf2 = NULL;
    LPTV_ITEMDATA lptvid = (LPTV_ITEMDATA) pnmtv->itemNew.lParam;
    HRESULT r;

    TRACE("TVN_ITEMEXPANDINGA/W\n");

    if ((pnmtv->itemNew.state & TVIS_EXPANDEDONCE))
        return 0;

    if (lptvid->lpi && lptvid->lpi->mkid.cb) {
        r = IShellFolder_BindToObject( lptvid->lpsfParent, lptvid->lpi, 0,
                                      (REFIID)&IID_IShellFolder, (LPVOID *)&lpsf2 );
    } else {
        lpsf2 = lptvid->lpsfParent;
        r = IShellFolder_AddRef(lpsf2);
    }

    if (SUCCEEDED(r))
        FillTreeView( info, lpsf2, lptvid->lpifq, pnmtv->itemNew.hItem, lptvid->pEnumIL);

    /* My Computer is already sorted and trying to do a simple text
     * sort will only mess things up */
    if (!_ILIsMyComputer(lptvid->lpi))
        SendMessageW( info->hwndTreeView, TVM_SORTCHILDREN,
                      FALSE, (LPARAM)pnmtv->itemNew.hItem );

    return 0;
}

static HRESULT BrsFolder_Treeview_Changed( browse_info *info, NMTREEVIEWW *pnmtv )
{
    LPTV_ITEMDATA lptvid = (LPTV_ITEMDATA) pnmtv->itemNew.lParam;

    lptvid = (LPTV_ITEMDATA) pnmtv->itemNew.lParam;
    info->pidlRet = lptvid->lpifq;
    browsefolder_callback( info->lpBrowseInfo, info->hWnd, BFFM_SELCHANGED,
                           (LPARAM)info->pidlRet );
    BrsFolder_CheckValidSelection( info, lptvid );
    return 0;
}

static LRESULT BrsFolder_OnNotify( browse_info *info, UINT CtlID, LPNMHDR lpnmh )
{
    NMTREEVIEWW *pnmtv = (NMTREEVIEWW *)lpnmh;

    TRACE("%p %x %p msg=%x\n", info, CtlID, lpnmh, pnmtv->hdr.code);

    if (pnmtv->hdr.idFrom != IDD_TREEVIEW)
        return 0;

    switch (pnmtv->hdr.code)
    {
    case TVN_DELETEITEMA:
    case TVN_DELETEITEMW:
        return BrsFolder_Treeview_Delete( info, pnmtv );

    case TVN_ITEMEXPANDINGA:
    case TVN_ITEMEXPANDINGW:
        return BrsFolder_Treeview_Expand( info, pnmtv );

    case TVN_SELCHANGEDA:
    case TVN_SELCHANGEDW:
        return BrsFolder_Treeview_Changed( info, pnmtv );

    default:
        WARN("unhandled (%d)\n", pnmtv->hdr.code);
        break;
    }

    return 0;
}


static BOOL BrsFolder_OnCreate( HWND hWnd, browse_info *info )
{
    LPBROWSEINFOW lpBrowseInfo = info->lpBrowseInfo;

    info->hWnd = hWnd;
    SetPropW( hWnd, szBrowseFolderInfo, info );

    if (lpBrowseInfo->ulFlags & ~SUPPORTEDFLAGS)
	FIXME("flags %x not implemented\n", lpBrowseInfo->ulFlags & ~SUPPORTEDFLAGS);

    if (lpBrowseInfo->lpszTitle)
	SetWindowTextW( GetDlgItem(hWnd, IDD_TITLE), lpBrowseInfo->lpszTitle );
    else
	ShowWindow( GetDlgItem(hWnd, IDD_TITLE), SW_HIDE );

    if (!(lpBrowseInfo->ulFlags & BIF_STATUSTEXT))
	ShowWindow( GetDlgItem(hWnd, IDD_STATUS), SW_HIDE );

    info->hwndTreeView = GetDlgItem( hWnd, IDD_TREEVIEW );
    if (info->hwndTreeView)
        InitializeTreeView( info );
    else
        ERR("treeview control missing!\n");

    browsefolder_callback( info->lpBrowseInfo, hWnd, BFFM_INITIALIZED, 0 );

    return TRUE;
}

static BOOL BrsFolder_OnCommand( browse_info *info, UINT id )
{
    LPBROWSEINFOW lpBrowseInfo = info->lpBrowseInfo;

    switch (id)
    {
    case IDOK:
        info->pidlRet = ILClone(info->pidlRet); /* The original pidl will be free'd. */
        pdump( info->pidlRet );
        if (lpBrowseInfo->pszDisplayName)
            SHGetPathFromIDListW( info->pidlRet, lpBrowseInfo->pszDisplayName );
        EndDialog( info->hWnd, 1 );
        return TRUE;

    case IDCANCEL:
        EndDialog( info->hWnd, 0 );
        return TRUE;
    }
    return FALSE;
}

static BOOL BrsFolder_OnSetExpanded(browse_info *info, LPVOID selection, 
    BOOL is_str, HTREEITEM *pItem)
{
    LPITEMIDLIST pidlSelection = (LPITEMIDLIST)selection;
    LPCITEMIDLIST pidlCurrent, pidlRoot;
    TVITEMEXW item;
    BOOL bResult = FALSE;
    
    /* If 'selection' is a string, convert to a Shell ID List. */ 
    if (is_str) {
        IShellFolder *psfDesktop;
        HRESULT hr;

        hr = SHGetDesktopFolder(&psfDesktop);
        if (FAILED(hr))
            goto done;

        hr = IShellFolder_ParseDisplayName(psfDesktop, NULL, NULL, 
                     (LPOLESTR)selection, NULL, &pidlSelection, NULL);
        IShellFolder_Release(psfDesktop);
        if (FAILED(hr)) 
            goto done;
    }

    /* Move pidlCurrent behind the SHITEMIDs in pidlSelection, which are the root of
     * the sub-tree currently displayed. */
    pidlRoot = info->lpBrowseInfo->pidlRoot;
    pidlCurrent = pidlSelection;
    while (!_ILIsEmpty(pidlRoot) && _ILIsEqualSimple(pidlRoot, pidlCurrent)) {
        pidlRoot = ILGetNext(pidlRoot);
        pidlCurrent = ILGetNext(pidlCurrent);
    }

    /* The given ID List is not part of the SHBrowseForFolder's current sub-tree. */
    if (!_ILIsEmpty(pidlRoot))
        goto done;

    /* Initialize item to point to the first child of the root folder. */
    memset(&item, 0, sizeof(item));
    item.mask = TVIF_PARAM;
    item.hItem = TreeView_GetRoot(info->hwndTreeView);
    if (item.hItem) 
        item.hItem = TreeView_GetChild(info->hwndTreeView, item.hItem);

    /* Walk the tree along the nodes corresponding to the remaining ITEMIDLIST */
    while (item.hItem && !_ILIsEmpty(pidlCurrent)) {
        LPTV_ITEMDATA pItemData;

        SendMessageW(info->hwndTreeView, TVM_GETITEMW, 0, (LPARAM)&item);
        pItemData = (LPTV_ITEMDATA)item.lParam;

        if (_ILIsEqualSimple(pItemData->lpi, pidlCurrent)) {
            pidlCurrent = ILGetNext(pidlCurrent);
            if (!_ILIsEmpty(pidlCurrent)) {
                /* Only expand current node and move on to it's first child,
                 * if we didn't already reach the last SHITEMID */
                SendMessageW(info->hwndTreeView, TVM_EXPAND, TVE_EXPAND, (LPARAM)item.hItem);
                item.hItem = TreeView_GetChild(info->hwndTreeView, item.hItem);
            }
        } else {
            item.hItem = TreeView_GetNextSibling(info->hwndTreeView, item.hItem);
        }
    }

    if (_ILIsEmpty(pidlCurrent) && item.hItem) 
        bResult = TRUE;

done:
    if (pidlSelection && pidlSelection != (LPITEMIDLIST)selection)
        ILFree(pidlSelection);

    if (pItem) 
        *pItem = item.hItem;
    
    return bResult;
}

static BOOL BrsFolder_OnSetSelectionW(browse_info *info, LPVOID selection, BOOL is_str) {
    HTREEITEM hItem;
    BOOL bResult;

    bResult = BrsFolder_OnSetExpanded(info, selection, is_str, &hItem);
    if (bResult)
        SendMessageW(info->hwndTreeView, TVM_SELECTITEM, TVGN_CARET, (LPARAM)hItem );
    return bResult;
}

static BOOL BrsFolder_OnSetSelectionA(browse_info *info, LPVOID selection, BOOL is_str) {
    LPWSTR selectionW = NULL;
    BOOL result = FALSE;
    int length;
    
    if (!is_str)
        return BrsFolder_OnSetSelectionW(info, selection, is_str);
    
    if ((length = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)selection, -1, NULL, 0)) &&
        (selectionW = HeapAlloc(GetProcessHeap(), 0, length * sizeof(WCHAR))) &&
        MultiByteToWideChar(CP_ACP, 0, (LPCSTR)selection, -1, selectionW, length))
    {
        result = BrsFolder_OnSetSelectionW(info, selectionW, is_str);
    }

    HeapFree(GetProcessHeap(), 0, selectionW);
    return result;
}

/*************************************************************************
 *             BrsFolderDlgProc32  (not an exported API function)
 */
static INT_PTR CALLBACK BrsFolderDlgProc( HWND hWnd, UINT msg, WPARAM wParam,
				          LPARAM lParam )
{
    browse_info *info;

    TRACE("hwnd=%p msg=%04x 0x%08x 0x%08lx\n", hWnd,  msg, wParam, lParam );

    if (msg == WM_INITDIALOG)
        return BrsFolder_OnCreate( hWnd, (browse_info*) lParam );

    info = (browse_info*) GetPropW( hWnd, szBrowseFolderInfo );

    switch (msg)
    {
    case WM_NOTIFY:
        return BrsFolder_OnNotify( info, (UINT)wParam, (LPNMHDR)lParam);

    case WM_COMMAND:
        return BrsFolder_OnCommand( info, wParam );

    case BFFM_SETSTATUSTEXTA:
        TRACE("Set status %s\n", debugstr_a((LPSTR)lParam));
        SetWindowTextA(GetDlgItem(hWnd, IDD_STATUS), (LPSTR)lParam);
        break;

    case BFFM_SETSTATUSTEXTW:
        TRACE("Set status %s\n", debugstr_w((LPWSTR)lParam));
        SetWindowTextW(GetDlgItem(hWnd, IDD_STATUS), (LPWSTR)lParam);
        break;

    case BFFM_ENABLEOK:
        TRACE("Enable %ld\n", lParam);
        EnableWindow(GetDlgItem(hWnd, 1), (lParam)?TRUE:FALSE);
        break;

    case BFFM_SETOKTEXT: /* unicode only */
        TRACE("Set OK text %s\n", debugstr_w((LPWSTR)wParam));
        SetWindowTextW(GetDlgItem(hWnd, 1), (LPWSTR)wParam);
        break;

    case BFFM_SETSELECTIONA:
        return BrsFolder_OnSetSelectionA(info, (LPVOID)lParam, (BOOL)wParam);

    case BFFM_SETSELECTIONW:
        return BrsFolder_OnSetSelectionW(info, (LPVOID)lParam, (BOOL)wParam);

    case BFFM_SETEXPANDED: /* unicode only */
        return BrsFolder_OnSetExpanded(info, (LPVOID)lParam, (BOOL)wParam, NULL);
    }
    return FALSE;
}

static const WCHAR swBrowseTemplateName[] = {
    'S','H','B','R','S','F','O','R','F','O','L','D','E','R','_','M','S','G','B','O','X',0};

/*************************************************************************
 * SHBrowseForFolderA [SHELL32.@]
 * SHBrowseForFolder  [SHELL32.@]
 */
LPITEMIDLIST WINAPI SHBrowseForFolderA (LPBROWSEINFOA lpbi)
{
    BROWSEINFOW bi;
    LPITEMIDLIST lpid;
    INT len;
    LPWSTR title;

    TRACE("%p\n", lpbi);

    bi.hwndOwner = lpbi->hwndOwner;
    bi.pidlRoot = lpbi->pidlRoot;
    if (lpbi->pszDisplayName)
    {
        bi.pszDisplayName = HeapAlloc( GetProcessHeap(), 0, MAX_PATH * sizeof(WCHAR) );
        MultiByteToWideChar( CP_ACP, 0, lpbi->pszDisplayName, -1, bi.pszDisplayName, MAX_PATH );
    }
    else
        bi.pszDisplayName = NULL;

    if (lpbi->lpszTitle)
    {
        len = MultiByteToWideChar( CP_ACP, 0, lpbi->lpszTitle, -1, NULL, 0 );
        title = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
        MultiByteToWideChar( CP_ACP, 0, lpbi->lpszTitle, -1, title, len );
    }
    else
        title = NULL;

    bi.lpszTitle = title;
    bi.ulFlags = lpbi->ulFlags;
    bi.lpfn = lpbi->lpfn;
    bi.lParam = lpbi->lParam;
    bi.iImage = lpbi->iImage;
    lpid = SHBrowseForFolderW( &bi );
    if (bi.pszDisplayName)
    {
        WideCharToMultiByte( CP_ACP, 0, bi.pszDisplayName, -1,
                             lpbi->pszDisplayName, MAX_PATH, 0, NULL);
        HeapFree( GetProcessHeap(), 0, bi.pszDisplayName );
    }
    HeapFree(GetProcessHeap(), 0, title);
    lpbi->iImage = bi.iImage;
    return lpid;
}


/*************************************************************************
 * SHBrowseForFolderW [SHELL32.@]
 *
 * NOTES
 *  crashes when passed a null pointer
 */
LPITEMIDLIST WINAPI SHBrowseForFolderW (LPBROWSEINFOW lpbi)
{
    browse_info info;
    DWORD r;
    HRESULT hr;

    info.hWnd = 0;
    info.pidlRet = NULL;
    info.lpBrowseInfo = lpbi;
    info.hwndTreeView = NULL;

    hr = OleInitialize(NULL);
    r = DialogBoxParamW( shell32_hInstance, swBrowseTemplateName, lpbi->hwndOwner,
	                 BrsFolderDlgProc, (LPARAM)&info );
    if (SUCCEEDED(hr)) 
        OleUninitialize();
    if (!r)
        return NULL;

    return info.pidlRet;
}