programs/regedit/treeview.c

   1 /*
   2  * Regedit treeview
   3  *
   4  * Copyright (C) 2002 Robert Dickenson <robd@reactos.org>
   5  * Copyright (C) 2008 Alexander N. Sørnes <alex@thehandofagony.com>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #define WIN32_LEAN_AND_MEAN     /* Exclude rarely-used stuff from Windows headers */
  23
  24 #define NONAMELESSUNION
  25 #define NONAMELESSSTRUCT
  26 #include <windows.h>
  27 #include <commctrl.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <wine/debug.h>
  31 #include <shlwapi.h>
  32
  33 #include "main.h"
  34 #include "regproc.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(regedit);
  37
  38 /* Global variables and constants  */
  39 /* Image_Open, Image_Closed, and Image_Root - integer variables for indexes of the images.  */
  40 /* CX_BITMAP and CY_BITMAP - width and height of an icon.  */
  41 /* NUM_BITMAPS - number of bitmaps to add to the image list.  */
  42 int Image_Open;
  43 int Image_Closed;
  44 int Image_Root;
  45
  46 #define CX_ICON    16
  47 #define CY_ICON    16
  48 #define NUM_ICONS    3
  49
  50 static BOOL UpdateExpandingTree(HWND hwndTV, HTREEITEM hItem, int state);
  51
  52 static BOOL get_item_path(HWND hwndTV, HTREEITEM hItem, HKEY* phKey, LPWSTR* pKeyPath, int* pPathLen, int* pMaxChars)
  53 {
  54     TVITEMW item;
  55     int maxChars, chars;
  56     LPWSTR newStr;
  57
  58     item.mask = TVIF_PARAM;
  59     item.hItem = hItem;
  60     if (!TreeView_GetItem(hwndTV, &item)) return FALSE;
  61
  62     if (item.lParam) {
  63     /* found root key with valid key value */
  64     *phKey = (HKEY)item.lParam;
  65     return TRUE;
  66     }
  67
  68     if(!get_item_path(hwndTV, TreeView_GetParent(hwndTV, hItem), phKey, pKeyPath, pPathLen, pMaxChars)) return FALSE;
  69     if (*pPathLen) {
  70         (*pKeyPath)[*pPathLen] = '\\';
  71         ++(*pPathLen);
  72     }
  73
  74     do {
  75         item.mask = TVIF_TEXT;
  76         item.hItem = hItem;
  77         item.pszText = *pKeyPath + *pPathLen;
  78         item.cchTextMax = maxChars = *pMaxChars - *pPathLen;
  79         if (!TreeView_GetItemW(hwndTV, &item)) return FALSE;
  80         chars = lstrlenW(item.pszText);
  81     if (chars < maxChars - 1) {
  82             *pPathLen += chars;
  83             break;
  84     }
  85     newStr = HeapReAlloc(GetProcessHeap(), 0, *pKeyPath, *pMaxChars * 2);
  86     if (!newStr) return FALSE;
  87     *pKeyPath = newStr;
  88     *pMaxChars *= 2;
  89     } while(TRUE);
  90
  91     return TRUE;
  92 }
  93
  94 LPWSTR GetItemPath(HWND hwndTV, HTREEITEM hItem, HKEY* phRootKey)
  95 {
  96     int pathLen = 0, maxLen;
  97     WCHAR *pathBuffer;
  98
  99     pathBuffer = HeapAlloc(GetProcessHeap(), 0, 1024*sizeof(WCHAR));
 100     if (!pathBuffer) return NULL;
 101     *pathBuffer = 0;
 102     maxLen = HeapSize(GetProcessHeap(), 0, pathBuffer);
 103     if (maxLen == (SIZE_T) - 1) return NULL;
 104     maxLen = maxLen / sizeof(WCHAR);
 105     if (!hItem) hItem = TreeView_GetSelection(hwndTV);
 106     if (!hItem) return NULL;
 107     if (!get_item_path(hwndTV, hItem, phRootKey, &pathBuffer, &pathLen, &maxLen)) return NULL;
 108     return pathBuffer;
 109 }
 110
 111 static LPWSTR get_path_component(LPCWSTR *lplpKeyName) {
 112      LPCWSTR lpPos = *lplpKeyName;
 113      LPWSTR lpResult = NULL;
 114      int len;
 115      if (!lpPos)
 116          return NULL;
 117      while(*lpPos && *lpPos != '\\')
 118          lpPos++;
 119      if (*lpPos && lpPos == *lplpKeyName)
 120          return NULL;
 121      len = lpPos+1-(*lplpKeyName);
 122      lpResult = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
 123      if (!lpResult) /* that would be very odd */
 124          return NULL;
 125      lstrcpynW(lpResult, *lplpKeyName, len);
 126      *lplpKeyName = *lpPos ? lpPos+1 : NULL;
 127      return lpResult;
 128 }
 129
 130 HTREEITEM FindPathInTree(HWND hwndTV, LPCWSTR lpKeyName) {
 131     TVITEMEXW tvi;
 132     WCHAR buf[261]; /* tree view has 260 character limitation on item name */
 133     HTREEITEM hItem, hOldItem;
 134
 135     buf[260] = '\0';
 136     hItem = TreeView_GetRoot(hwndTV);
 137     SendMessageW(hwndTV, TVM_EXPAND, TVE_EXPAND, (LPARAM)hItem );
 138     hItem = TreeView_GetChild(hwndTV, hItem);
 139     hOldItem = hItem;
 140     while(1) {
 141         LPWSTR lpItemName = get_path_component(&lpKeyName);
 142
 143         if (lpItemName) {
 144             while(hItem) {
 145                 tvi.mask = TVIF_TEXT | TVIF_HANDLE;
 146                 tvi.hItem = hItem;
 147                 tvi.pszText = buf;
 148                 tvi.cchTextMax = 260;
 149                 SendMessageW(hwndTV, TVM_GETITEMW, 0, (LPARAM) &tvi);
 150                 if (!lstrcmpiW(tvi.pszText, lpItemName)) {
 151                      SendMessageW(hwndTV, TVM_EXPAND, TVE_EXPAND, (LPARAM)hItem );
 152                      if (!lpKeyName)
 153                      {
 154                          HeapFree(GetProcessHeap(), 0, lpItemName);
 155                          return hItem;
 156                      }
 157                      hOldItem = hItem;
 158                      hItem = TreeView_GetChild(hwndTV, hItem);
 159                      break;
 160                 }
 161                 hItem = TreeView_GetNextSibling(hwndTV, hItem);
 162             }
 163             HeapFree(GetProcessHeap(), 0, lpItemName);
 164             if (!hItem)
 165                 return hOldItem;
 166         }
 167         else
 168             return hItem;
 169     }
 170 }
 171
 172 BOOL DeleteNode(HWND hwndTV, HTREEITEM hItem)
 173 {
 174     if (!hItem) hItem = TreeView_GetSelection(hwndTV);
 175     if (!hItem) return FALSE;
 176     return TreeView_DeleteItem(hwndTV, hItem);
 177 }
 178
 179 /* Add an entry to the tree. Only give hKey for root nodes (HKEY_ constants) */
 180 static HTREEITEM AddEntryToTree(HWND hwndTV, HTREEITEM hParent, LPWSTR label, HKEY hKey, DWORD dwChildren)
 181 {
 182     TVINSERTSTRUCTW tvins;
 183
 184     if (hKey) {
 185         if (RegQueryInfoKeyW(hKey, 0, 0, 0, &dwChildren, 0, 0, 0, 0, 0, 0, 0) != ERROR_SUCCESS) {
 186             dwChildren = 0;
 187         }
 188     }
 189
 190     tvins.u.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_CHILDREN | TVIF_PARAM;
 191     tvins.u.item.pszText = label;
 192     tvins.u.item.cchTextMax = lstrlenW(label);
 193     tvins.u.item.iImage = Image_Closed;
 194     tvins.u.item.iSelectedImage = Image_Open;
 195     tvins.u.item.cChildren = dwChildren;
 196     tvins.u.item.lParam = (LPARAM)hKey;
 197     tvins.hInsertAfter = (HTREEITEM)(hKey ? TVI_LAST : TVI_SORT);
 198     tvins.hParent = hParent;
 199
 200     return TreeView_InsertItemW(hwndTV, &tvins);
 201 }
 202
 203 static BOOL match_string(LPCWSTR sstring1, LPCWSTR sstring2, int mode)
 204 {
 205     if (mode & SEARCH_WHOLE)
 206         return !lstrcmpiW(sstring1, sstring2);
 207     else
 208         return NULL != StrStrIW(sstring1, sstring2);
 209 }
 210
 211 static BOOL match_item(HWND hwndTV, HTREEITEM hItem, LPCWSTR sstring, int mode, int *row)
 212 {
 213     TVITEMW item;
 214     WCHAR keyname[KEY_MAX_LEN];
 215     item.mask = TVIF_TEXT;
 216     item.hItem = hItem;
 217     item.pszText = keyname;
 218     item.cchTextMax = KEY_MAX_LEN;
 219     if (!TreeView_GetItem(hwndTV, &item)) return FALSE;
 220     if ((mode & SEARCH_KEYS) && match_string(keyname, sstring, mode)) {
 221         *row = -1;
 222         return TRUE;
 223     }
 224
 225     if (mode & (SEARCH_VALUES | SEARCH_CONTENT)) {
 226         int i, adjust;
 227         WCHAR valName[KEY_MAX_LEN], *KeyPath;
 228         HKEY hKey, hRoot;
 229         DWORD lenName;
 230
 231         KeyPath = GetItemPath(hwndTV, hItem, &hRoot);
 232
 233         if (!KeyPath || !hRoot)
 234              return FALSE;
 235
 236         if (RegOpenKeyExW(hRoot, KeyPath, 0, KEY_READ, &hKey) != ERROR_SUCCESS) {
 237             HeapFree(GetProcessHeap(), 0, KeyPath);
 238             return FALSE;
 239         }
 240
 241         HeapFree(GetProcessHeap(), 0, KeyPath);
 242         lenName = KEY_MAX_LEN;
 243         adjust = 0;
 244         /* RegEnumValue won't return empty default value, so fake it when dealing with *row,
 245            which corresponds to list view rows, not value ids */
 246         if (ERROR_SUCCESS == RegEnumValueW(hKey, 0, valName, &lenName, NULL, NULL, NULL, NULL) && *valName)
 247             adjust = 1;
 248
 249         i = (*row)-adjust;
 250         if (i < 0) i = 0;
 251         while(1) {
 252             DWORD lenValue = 0, type = 0;
 253             lenName = KEY_MAX_LEN;
 254
 255             if (ERROR_SUCCESS != RegEnumValueW(hKey,
 256                 i, valName, &lenName, NULL, &type, NULL, &lenValue))
 257                 break;
 258
 259             if (mode & SEARCH_VALUES) {
 260                 if (match_string(valName, sstring, mode)) {
 261                     RegCloseKey(hKey);
 262                     *row = i+adjust;
 263                     return TRUE;
 264                 }
 265             }
 266
 267             if ((mode & SEARCH_CONTENT) && (type == REG_EXPAND_SZ || type == REG_SZ)) {
 268                 LPWSTR buffer;
 269                 buffer = HeapAlloc(GetProcessHeap(), 0, lenValue);
 270                 RegEnumValueW(hKey, i, valName, &lenName, NULL, &type, (LPBYTE)buffer, &lenValue);
 271                 if (match_string(buffer, sstring, mode)) {
 272                     HeapFree(GetProcessHeap(), 0, buffer);
 273                     RegCloseKey(hKey);
 274                     *row = i+adjust;
 275                     return TRUE;
 276                 }
 277                 HeapFree(GetProcessHeap(), 0, buffer);
 278             }
 279
 280             i++;
 281         }
 282         RegCloseKey(hKey);
 283     }
 284     return FALSE;
 285 }
 286
 287 HTREEITEM FindNext(HWND hwndTV, HTREEITEM hItem, LPCWSTR sstring, int mode, int *row)
 288 {
 289     HTREEITEM hTry, hLast;
 290
 291     hLast = hItem;
 292     (*row)++;
 293     if (match_item(hwndTV, hLast, sstring, mode & ~SEARCH_KEYS, row)) {
 294         return hLast;
 295     }
 296     *row = 0;
 297
 298     while(hLast) {
 299         /* first look in subtree */
 300         /* no children? maybe we haven't loaded them yet? */
 301         if (!TreeView_GetChild(hwndTV, hLast)) {
 302             UpdateExpandingTree(hwndTV, hLast, TreeView_GetItemState(hwndTV, hLast, -1));
 303         }
 304         hTry = TreeView_GetChild(hwndTV, hLast);
 305         if (hTry) {
 306             if (match_item(hwndTV, hTry, sstring, mode, row))
 307                 return hTry;
 308             hLast = hTry;
 309             continue;
 310         }
 311         /* no more children, maybe there are any siblings? */
 312         hTry = TreeView_GetNextSibling(hwndTV, hLast);
 313         if (hTry) {
 314             if (match_item(hwndTV, hTry, sstring, mode, row))
 315                 return hTry;
 316             hLast = hTry;
 317             continue;
 318         }
 319         /* no more siblings, look at the next siblings in parent(s) */
 320         hLast = TreeView_GetParent(hwndTV, hLast);
 321         if (!hLast)
 322             return NULL;
 323         while (hLast && (hTry = TreeView_GetNextSibling(hwndTV, hLast)) == NULL) {
 324             hLast = TreeView_GetParent(hwndTV, hLast);
 325         }
 326         if (match_item(hwndTV, hTry, sstring, mode, row))
 327             return hTry;
 328         hLast = hTry;
 329     }
 330     return NULL;
 331 }
 332
 333 static BOOL RefreshTreeItem(HWND hwndTV, HTREEITEM hItem)
 334 {
 335     HKEY hRoot, hKey, hSubKey;
 336     HTREEITEM childItem;
 337     LPWSTR KeyPath;
 338     DWORD dwCount, dwIndex, dwMaxSubKeyLen;
 339     LPWSTR Name;
 340     TVITEMW tvItem;
 341
 342     hRoot = NULL;
 343     KeyPath = GetItemPath(hwndTV, hItem, &hRoot);
 344
 345     if (!KeyPath || !hRoot)
 346         return FALSE;
 347
 348     if (*KeyPath) {
 349         if (RegOpenKeyExW(hRoot, KeyPath, 0, KEY_READ, &hKey) != ERROR_SUCCESS) {
 350             WINE_TRACE("RegOpenKeyEx failed, %s was probably removed.\n", wine_dbgstr_w(KeyPath));
 351             return FALSE;
 352         }
 353     } else {
 354         hKey = hRoot;
 355     }
 356     HeapFree(GetProcessHeap(), 0, KeyPath);
 357
 358     if (RegQueryInfoKeyW(hKey, 0, 0, 0, &dwCount, &dwMaxSubKeyLen, 0, 0, 0, 0, 0, 0) != ERROR_SUCCESS) {
 359         return FALSE;
 360     }
 361
 362     /* Set the number of children again */
 363     tvItem.mask = TVIF_CHILDREN;
 364     tvItem.hItem = hItem;
 365     tvItem.cChildren = dwCount;
 366     if (!TreeView_SetItemW(hwndTV, &tvItem)) {
 367         return FALSE;
 368     }
 369
 370     /* We don't have to bother with the rest if it's not expanded. */
 371     if (TreeView_GetItemState(hwndTV, hItem, TVIS_EXPANDED) == 0) {
 372         RegCloseKey(hKey);
 373         return TRUE;
 374     }
 375
 376     dwMaxSubKeyLen++; /* account for the \0 terminator */
 377     if (!(Name = HeapAlloc(GetProcessHeap(), 0, dwMaxSubKeyLen * sizeof(WCHAR)))) {
 378         return FALSE;
 379     }
 380     tvItem.cchTextMax = dwMaxSubKeyLen;
 381     if (!(tvItem.pszText = HeapAlloc(GetProcessHeap(), 0, dwMaxSubKeyLen * sizeof(WCHAR)))) {
 382         HeapFree(GetProcessHeap(), 0, Name);
 383         return FALSE;
 384     }
 385
 386     /* Now go through all the children in the registry, and check if any have to be added. */
 387     for (dwIndex = 0; dwIndex < dwCount; dwIndex++) {
 388         DWORD cName = dwMaxSubKeyLen, dwSubCount;
 389         BOOL found;
 390
 391         found = FALSE;
 392         if (RegEnumKeyExW(hKey, dwIndex, Name, &cName, 0, 0, 0, NULL) != ERROR_SUCCESS) {
 393             continue;
 394         }
 395
 396         /* Find the number of children of the node. */
 397         dwSubCount = 0;
 398         if (RegOpenKeyExW(hKey, Name, 0, KEY_QUERY_VALUE, &hSubKey) == ERROR_SUCCESS) {
 399             if (RegQueryInfoKey(hSubKey, 0, 0, 0, &dwSubCount, 0, 0, 0, 0, 0, 0, 0) != ERROR_SUCCESS) {
 400                 dwSubCount = 0;
 401             }
 402             RegCloseKey(hSubKey);
 403         }
 404
 405         /* Check if the node is already in there. */
 406         for (childItem = TreeView_GetChild(hwndTV, hItem); childItem;
 407                 childItem = TreeView_GetNextSibling(hwndTV, childItem)) {
 408             tvItem.mask = TVIF_TEXT;
 409             tvItem.hItem = childItem;
 410             if (!TreeView_GetItemW(hwndTV, &tvItem)) {
 411                 HeapFree(GetProcessHeap(), 0, Name);
 412                 HeapFree(GetProcessHeap(), 0, tvItem.pszText);
 413                 return FALSE;
 414             }
 415
 416             if (!lstrcmpiW(tvItem.pszText, Name)) {
 417                 found = TRUE;
 418                 break;
 419             }
 420         }
 421
 422         if (found == FALSE) {
 423             WINE_TRACE("New subkey %s\n", wine_dbgstr_w(Name));
 424             AddEntryToTree(hwndTV, hItem, Name, NULL, dwSubCount);
 425         }
 426     }
 427     HeapFree(GetProcessHeap(), 0, Name);
 428     HeapFree(GetProcessHeap(), 0, tvItem.pszText);
 429     RegCloseKey(hKey);
 430
 431     /* Now go through all the children in the tree, and check if any have to be removed. */
 432     childItem = TreeView_GetChild(hwndTV, hItem);
 433     while (childItem) {
 434         HTREEITEM nextItem = TreeView_GetNextSibling(hwndTV, childItem);
 435         if (RefreshTreeItem(hwndTV, childItem) == FALSE) {
 436             SendMessageW(hwndTV, TVM_DELETEITEM, 0, (LPARAM)childItem);
 437         }
 438         childItem = nextItem;
 439     }
 440
 441     return TRUE;
 442 }
 443
 444 BOOL RefreshTreeView(HWND hwndTV)
 445 {
 446     HTREEITEM hItem;
 447     HTREEITEM hSelectedItem;
 448     HCURSOR hcursorOld;
 449
 450     WINE_TRACE("\n");
 451     hSelectedItem = TreeView_GetSelection(hwndTV);
 452     hcursorOld = SetCursor(LoadCursor(NULL, IDC_WAIT));
 453     SendMessageW(hwndTV, WM_SETREDRAW, FALSE, 0);
 454
 455     hItem = TreeView_GetChild(hwndTV, TreeView_GetRoot(hwndTV));
 456     while (hItem) {
 457         RefreshTreeItem(hwndTV, hItem);
 458         hItem = TreeView_GetNextSibling(hwndTV, hItem);
 459     }
 460
 461     SendMessageW(hwndTV, WM_SETREDRAW, TRUE, 0);
 462     InvalidateRect(hwndTV, NULL, FALSE);
 463     SetCursor(hcursorOld);
 464
 465     /* We reselect the currently selected node, this will prompt a refresh of the listview. */
 466     SendMessageW(hwndTV, TVM_SELECTITEM, TVGN_CARET, (LPARAM)hSelectedItem);
 467     return TRUE;
 468 }
 469
 470 HTREEITEM InsertNode(HWND hwndTV, HTREEITEM hItem, LPWSTR name)
 471 {
 472     WCHAR buf[MAX_NEW_KEY_LEN];
 473     HTREEITEM hNewItem = 0;
 474     TVITEMEXW item;
 475
 476     if (!hItem) hItem = TreeView_GetSelection(hwndTV);
 477     if (!hItem) return FALSE;
 478     if (TreeView_GetItemState(hwndTV, hItem, TVIS_EXPANDEDONCE)) {
 479         hNewItem = AddEntryToTree(hwndTV, hItem, name, 0, 0);
 480     } else {
 481         item.mask = TVIF_CHILDREN | TVIF_HANDLE;
 482         item.hItem = hItem;
 483         if (!TreeView_GetItemW(hwndTV, &item)) return FALSE;
 484         item.cChildren = 1;
 485         if (!TreeView_SetItemW(hwndTV, &item)) return FALSE;
 486     }
 487     SendMessageW(hwndTV, TVM_EXPAND, TVE_EXPAND, (LPARAM)hItem );
 488     if (!hNewItem) {
 489         for(hNewItem = TreeView_GetChild(hwndTV, hItem); hNewItem; hNewItem = TreeView_GetNextSibling(hwndTV, hNewItem)) {
 490             item.mask = TVIF_HANDLE | TVIF_TEXT;
 491             item.hItem = hNewItem;
 492             item.pszText = buf;
 493             item.cchTextMax = COUNT_OF(buf);
 494             if (!TreeView_GetItemW(hwndTV, &item)) continue;
 495             if (lstrcmpW(name, item.pszText) == 0) break;
 496         }
 497     }
 498     if (hNewItem)
 499         SendMessageW(hwndTV, TVM_SELECTITEM, TVGN_CARET, (LPARAM)hNewItem);
 500
 501     return hNewItem;
 502 }
 503
 504 HWND StartKeyRename(HWND hwndTV)
 505 {
 506     HTREEITEM hItem;
 507
 508     if(!(hItem = TreeView_GetSelection(hwndTV))) return 0;
 509     return TreeView_EditLabel(hwndTV, hItem);
 510 }
 511
 512 static BOOL InitTreeViewItems(HWND hwndTV, LPWSTR pHostName)
 513 {
 514     TVINSERTSTRUCTW tvins;
 515     HTREEITEM hRoot;
 516     static WCHAR hkcr[] = {'H','K','E','Y','_','C','L','A','S','S','E','S','_','R','O','O','T',0},
 517                  hkcu[] = {'H','K','E','Y','_','C','U','R','R','E','N','T','_','U','S','E','R',0},
 518                  hklm[] = {'H','K','E','Y','_','L','O','C','A','L','_','M','A','C','H','I','N','E',0},
 519                  hku[]  = {'H','K','E','Y','_','U','S','E','R','S',0},
 520                  hkcc[] = {'H','K','E','Y','_','C','U','R','R','E','N','T','_','C','O','N','F','I','G',0},
 521                  hkdd[] = {'H','K','E','Y','_','D','Y','N','_','D','A','T','A',0};
 522
 523     tvins.u.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_CHILDREN | TVIF_PARAM;
 524     /* Set the text of the item.  */
 525     tvins.u.item.pszText = pHostName;
 526     tvins.u.item.cchTextMax = lstrlenW(pHostName);
 527     /* Assume the item is not a parent item, so give it an image.  */
 528     tvins.u.item.iImage = Image_Root;
 529     tvins.u.item.iSelectedImage = Image_Root;
 530     tvins.u.item.cChildren = 5;
 531     /* Save the heading level in the item's application-defined data area.  */
 532     tvins.u.item.lParam = (LPARAM)NULL;
 533     tvins.hInsertAfter = (HTREEITEM)TVI_FIRST;
 534     tvins.hParent = TVI_ROOT;
 535     /* Add the item to the tree view control.  */
 536     if (!(hRoot = TreeView_InsertItemW(hwndTV, &tvins))) return FALSE;
 537
 538     if (!AddEntryToTree(hwndTV, hRoot, hkcr, HKEY_CLASSES_ROOT, 1)) return FALSE;
 539     if (!AddEntryToTree(hwndTV, hRoot, hkcu, HKEY_CURRENT_USER, 1)) return FALSE;
 540     if (!AddEntryToTree(hwndTV, hRoot, hklm, HKEY_LOCAL_MACHINE, 1)) return FALSE;
 541     if (!AddEntryToTree(hwndTV, hRoot, hku, HKEY_USERS, 1)) return FALSE;
 542     if (!AddEntryToTree(hwndTV, hRoot, hkcc, HKEY_CURRENT_CONFIG, 1)) return FALSE;
 543     if (!AddEntryToTree(hwndTV, hRoot, hkdd, HKEY_DYN_DATA, 1)) return FALSE;
 544
 545     /* expand and select host name */
 546     SendMessageW(hwndTV, TVM_EXPAND, TVE_EXPAND, (LPARAM)hRoot );
 547     SendMessageW(hwndTV, TVM_SELECTITEM, TVGN_CARET, (LPARAM)hRoot);
 548     return TRUE;
 549 }
 550
 551
 552 /*
 553  * InitTreeViewImageLists - creates an image list, adds three bitmaps
 554  * to it, and associates the image list with a tree view control.
 555  * Returns TRUE if successful, or FALSE otherwise.
 556  * hwndTV - handle to the tree view control.
 557  */
 558 static BOOL InitTreeViewImageLists(HWND hwndTV)
 559 {
 560     HIMAGELIST himl;  /* handle to image list  */
 561     HICON hico;       /* handle to icon  */
 562
 563     /* Create the image list.  */
 564     if ((himl = ImageList_Create(CX_ICON, CY_ICON,
 565                                  ILC_MASK, 0, NUM_ICONS)) == NULL)
 566         return FALSE;
 567
 568     /* Add the open file, closed file, and document bitmaps.  */
 569     hico = LoadIconW(hInst, MAKEINTRESOURCEW(IDI_OPEN_FILE));
 570     Image_Open = ImageList_AddIcon(himl, hico);
 571
 572     hico = LoadIconW(hInst, MAKEINTRESOURCEW(IDI_CLOSED_FILE));
 573     Image_Closed = ImageList_AddIcon(himl, hico);
 574
 575     hico = LoadIconW(hInst, MAKEINTRESOURCEW(IDI_ROOT));
 576     Image_Root = ImageList_AddIcon(himl, hico);
 577
 578     /* Fail if not all of the images were added.  */
 579     if (ImageList_GetImageCount(himl) < NUM_ICONS)
 580     {
 581       return FALSE;
 582     }
 583
 584     /* Associate the image list with the tree view control.  */
 585     SendMessageW(hwndTV, TVM_SETIMAGELIST, TVSIL_NORMAL, (LPARAM)himl);
 586
 587     return TRUE;
 588 }
 589
 590 BOOL UpdateExpandingTree(HWND hwndTV, HTREEITEM hItem, int state)
 591 {
 592     DWORD dwCount, dwIndex, dwMaxSubKeyLen;
 593     HKEY hRoot, hNewKey, hKey;
 594     LPWSTR keyPath;
 595     LPWSTR Name;
 596     LONG errCode;
 597     HCURSOR hcursorOld;
 598
 599     static int expanding;
 600     if (expanding) return FALSE;
 601     if (state & TVIS_EXPANDEDONCE ) {
 602         return TRUE;
 603     }
 604     expanding = TRUE;
 605     hcursorOld = SetCursor(LoadCursor(NULL, IDC_WAIT));
 606     SendMessageW(hwndTV, WM_SETREDRAW, FALSE, 0);
 607
 608     keyPath = GetItemPath(hwndTV, hItem, &hRoot);
 609     if (!keyPath) goto done;
 610
 611     if (*keyPath) {
 612         errCode = RegOpenKeyExW(hRoot, keyPath, 0, KEY_READ, &hNewKey);
 613         if (errCode != ERROR_SUCCESS) goto done;
 614     } else {
 615         hNewKey = hRoot;
 616     }
 617
 618     errCode = RegQueryInfoKeyW(hNewKey, 0, 0, 0, &dwCount, &dwMaxSubKeyLen, 0, 0, 0, 0, 0, 0);
 619     if (errCode != ERROR_SUCCESS) goto done;
 620     dwMaxSubKeyLen++; /* account for the \0 terminator */
 621     Name = HeapAlloc(GetProcessHeap(), 0, dwMaxSubKeyLen * sizeof(WCHAR));
 622     if (!Name) goto done;
 623
 624     for (dwIndex = 0; dwIndex < dwCount; dwIndex++) {
 625         DWORD cName = dwMaxSubKeyLen, dwSubCount;
 626
 627         errCode = RegEnumKeyExW(hNewKey, dwIndex, Name, &cName, 0, 0, 0, 0);
 628         if (errCode != ERROR_SUCCESS) continue;
 629         errCode = RegOpenKeyExW(hNewKey, Name, 0, KEY_QUERY_VALUE, &hKey);
 630         if (errCode == ERROR_SUCCESS) {
 631             errCode = RegQueryInfoKeyW(hKey, 0, 0, 0, &dwSubCount, 0, 0, 0, 0, 0, 0, 0);
 632             RegCloseKey(hKey);
 633         }
 634         if (errCode != ERROR_SUCCESS) dwSubCount = 0;
 635         AddEntryToTree(hwndTV, hItem, Name, NULL, dwSubCount);
 636     }
 637     RegCloseKey(hNewKey);
 638     HeapFree(GetProcessHeap(), 0, Name);
 639
 640 done:
 641     TreeView_SetItemState(hwndTV, hItem, TVIS_EXPANDEDONCE, TVIS_EXPANDEDONCE);
 642     SendMessageW(hwndTV, WM_SETREDRAW, TRUE, 0);
 643     SetCursor(hcursorOld);
 644     expanding = FALSE;
 645     HeapFree(GetProcessHeap(), 0, keyPath);
 646
 647     return TRUE;
 648 }
 649
 650 BOOL OnTreeExpanding(HWND hwndTV, NMTREEVIEW* pnmtv)
 651 {
 652     return UpdateExpandingTree(hwndTV, pnmtv->itemNew.hItem, pnmtv->itemNew.state);
 653 }
 654
 655
 656 /*
 657  * CreateTreeView - creates a tree view control.
 658  * Returns the handle to the new control if successful, or NULL otherwise.
 659  * hwndParent - handle to the control's parent window.
 660  */
 661 HWND CreateTreeView(HWND hwndParent, LPWSTR pHostName, UINT id)
 662 {
 663     RECT rcClient;
 664     HWND hwndTV;
 665     WCHAR TreeView[] = {'T','r','e','e',' ','V','i','e','w',0};
 666
 667     /* Get the dimensions of the parent window's client area, and create the tree view control.  */
 668     GetClientRect(hwndParent, &rcClient);
 669     hwndTV = CreateWindowExW(WS_EX_CLIENTEDGE, WC_TREEVIEWW, TreeView,
 670                             WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_HASLINES | TVS_HASBUTTONS | TVS_LINESATROOT,
 671                             0, 0, rcClient.right, rcClient.bottom,
 672                             hwndParent, (HMENU)ULongToHandle(id), hInst, NULL);
 673     SendMessageW(hwndTV, TVM_SETUNICODEFORMAT, TRUE, 0);
 674     /* Initialize the image list, and add items to the control.  */
 675     if (!InitTreeViewImageLists(hwndTV) || !InitTreeViewItems(hwndTV, pHostName)) {
 676         DestroyWindow(hwndTV);
 677         return NULL;
 678     }
 679     return hwndTV;
 680 }