reactos/subsys/system/regedit/treeview.c

   1 /*
   2  * Regedit treeview
   3  *
   4  * Copyright (C) 2002 Robert Dickenson <robd@reactos.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #define WIN32_LEAN_AND_MEAN     /* Exclude rarely-used stuff from Windows headers */
  22
  23 #define NONAMELESSUNION
  24 #define NONAMELESSSTRUCT
  25 #include <windows.h>
  26 #include <commctrl.h>
  27 #include <stdlib.h>
  28 #include <tchar.h>
  29 #include <process.h>
  30 #include <stdio.h>
  31
  32 #include "main.h"
  33
  34 /* Global variables and constants  */
  35 /* Image_Open, Image_Closed, and Image_Root - integer variables for indexes of the images.  */
  36 /* CX_ICON and CY_ICON - width and height of an icon.  */
  37 /* NUM_ICON - number of icons to add to the image list.  */
  38 int Image_Open;
  39 int Image_Closed;
  40 int Image_Root;
  41
  42 static LPTSTR pathBuffer;
  43
  44 #define CX_ICON    16
  45 #define CY_ICON    16
  46 #define NUM_ICONS    3
  47
  48 static BOOL get_item_path(HWND hwndTV, HTREEITEM hItem, HKEY* phKey, LPTSTR* pKeyPath, int* pPathLen, int* pMaxLen)
  49 {
  50     TVITEM item;
  51     int maxLen, len;
  52     LPTSTR newStr;
  53
  54     item.mask = TVIF_PARAM;
  55     item.hItem = hItem;
  56     if (!TreeView_GetItem(hwndTV, &item)) return FALSE;
  57
  58     if (item.lParam) {
  59         /* found root key with valid key value */
  60         *phKey = (HKEY)item.lParam;
  61         return TRUE;
  62     }
  63
  64     if(!get_item_path(hwndTV, TreeView_GetParent(hwndTV, hItem), phKey, pKeyPath, pPathLen, pMaxLen)) return FALSE;
  65     if (*pPathLen) {
  66         (*pKeyPath)[*pPathLen] = _T('\\');
  67         ++(*pPathLen);
  68     }
  69
  70     do {
  71         item.mask = TVIF_TEXT;
  72         item.hItem = hItem;
  73         item.pszText = *pKeyPath + *pPathLen;
  74         item.cchTextMax = maxLen = *pMaxLen - *pPathLen;
  75         if (!TreeView_GetItem(hwndTV, &item)) return FALSE;
  76         len = _tcslen(item.pszText);
  77         if (len < maxLen - 1) {
  78             *pPathLen += len;
  79             break;
  80         }
  81         newStr = HeapReAlloc(GetProcessHeap(), 0, *pKeyPath, *pMaxLen * 2);
  82         if (!newStr) return FALSE;
  83         *pKeyPath = newStr;
  84         *pMaxLen *= 2;
  85     } while(TRUE);
  86
  87     return TRUE;
  88 }
  89
  90 LPCTSTR GetItemPath(HWND hwndTV, HTREEITEM hItem, HKEY* phRootKey)
  91 {
  92     int pathLen = 0, maxLen;
  93
  94     *phRootKey = NULL;
  95     if (!pathBuffer) pathBuffer = HeapAlloc(GetProcessHeap(), 0, 1024);
  96     if (!pathBuffer) return NULL;
  97     *pathBuffer = 0;
  98     maxLen = HeapSize(GetProcessHeap(), 0, pathBuffer);
  99     if (maxLen == (SIZE_T) - 1) return NULL;
 100     if (!hItem) hItem = TreeView_GetSelection(hwndTV);
 101     if (!hItem) return NULL;
 102     if (!get_item_path(hwndTV, hItem, phRootKey, &pathBuffer, &pathLen, &maxLen)) return NULL;
 103     printf("hRoot=%p, keyPath='%s'\n", *phRootKey, pathBuffer);
 104     return pathBuffer;
 105 }
 106
 107 static HTREEITEM AddEntryToTree(HWND hwndTV, HTREEITEM hParent, LPTSTR label, HKEY hKey, DWORD dwChildren, HTREEITEM insAfter )
 108 {
 109     TVITEM tvi;
 110     TVINSERTSTRUCT tvins;
 111
 112     tvi.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_CHILDREN | TVIF_PARAM;
 113     tvi.pszText = label;
 114     tvi.cchTextMax = _tcslen(tvi.pszText);
 115     tvi.iImage = Image_Closed;
 116     tvi.iSelectedImage = Image_Open;
 117     tvi.cChildren = dwChildren;
 118     tvi.lParam = (LPARAM)hKey;
 119     tvins.u.item = tvi;
 120     tvins.hInsertAfter = insAfter;
 121     tvins.hParent = hParent;
 122     return TreeView_InsertItem(hwndTV, &tvins);
 123 }
 124
 125
 126 static BOOL InitTreeViewItems(HWND hwndTV, LPTSTR pHostName)
 127 {
 128     TVITEM tvi;
 129     TVINSERTSTRUCT tvins;
 130     HTREEITEM hRoot;
 131
 132     tvi.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_CHILDREN | TVIF_PARAM;
 133     /* Set the text of the item.  */
 134     tvi.pszText = pHostName;
 135     tvi.cchTextMax = _tcslen(tvi.pszText);
 136     /* Assume the item is not a parent item, so give it an image.  */
 137     tvi.iImage = Image_Root;
 138     tvi.iSelectedImage = Image_Root;
 139     tvi.cChildren = 5;
 140     /* Save the heading level in the item's application-defined data area.  */
 141     tvi.lParam = (LPARAM)NULL;
 142     tvins.u.item = tvi;
 143     tvins.hInsertAfter = (HTREEITEM)TVI_FIRST;
 144     tvins.hParent = TVI_ROOT;
 145     /* Add the item to the tree view control.  */
 146     if (!(hRoot = TreeView_InsertItem(hwndTV, &tvins))) return FALSE;
 147
 148     if (!AddEntryToTree(hwndTV, hRoot, _T("HKEY_CLASSES_ROOT"), HKEY_CLASSES_ROOT, 1, TVI_LAST)) return FALSE;
 149     if (!AddEntryToTree(hwndTV, hRoot, _T("HKEY_CURRENT_USER"), HKEY_CURRENT_USER, 1, TVI_LAST)) return FALSE;
 150     if (!AddEntryToTree(hwndTV, hRoot, _T("HKEY_LOCAL_MACHINE"), HKEY_LOCAL_MACHINE, 1, TVI_LAST)) return FALSE;
 151     if (!AddEntryToTree(hwndTV, hRoot, _T("HKEY_USERS"), HKEY_USERS, 1, TVI_LAST)) return FALSE;
 152     if (!AddEntryToTree(hwndTV, hRoot, _T("HKEY_CURRENT_CONFIG"), HKEY_CURRENT_CONFIG, 1, TVI_LAST)) return FALSE;
 153
 154     /* expand and select host name */
 155     TreeView_Expand(hwndTV, hRoot, TVE_EXPAND);
 156     TreeView_Select(hwndTV, hRoot, TVGN_CARET);
 157     return TRUE;
 158 }
 159
 160
 161 /*
 162  * InitTreeViewImageLists - creates an image list, adds three bitmaps
 163  * to it, and associates the image list with a tree view control.
 164  * Returns TRUE if successful, or FALSE otherwise.
 165  * hwndTV - handle to the tree view control.
 166  */
 167 static BOOL InitTreeViewImageLists(HWND hwndTV)
 168 {
 169     HIMAGELIST himl;  /* handle to image list  */
 170     HICON hico;       /* handle to icon  */
 171
 172     /* Create the image list.  */
 173     if ((himl = ImageList_Create(CX_ICON, CY_ICON,
 174                                  ILC_MASK, 0, NUM_ICONS)) == NULL)
 175         return FALSE;
 176
 177     /* Add the open file, closed file, and document bitmaps.  */
 178     hico = LoadIcon(hInst, MAKEINTRESOURCE(IDI_OPEN_FILE));
 179     Image_Open = ImageList_AddIcon(himl, hico);
 180
 181     hico = LoadIcon(hInst, MAKEINTRESOURCE(IDI_CLOSED_FILE));
 182     Image_Closed = ImageList_AddIcon(himl, hico);
 183
 184     hico = LoadIcon(hInst, MAKEINTRESOURCE(IDI_ROOT));
 185     Image_Root = ImageList_AddIcon(himl, hico);
 186
 187     /* Fail if not all of the images were added.  */
 188     if (ImageList_GetImageCount(himl) < NUM_ICONS)
 189     {
 190       return FALSE;
 191     }
 192
 193     /* Associate the image list with the tree view control.  */
 194     TreeView_SetImageList(hwndTV, himl, TVSIL_NORMAL);
 195
 196     return TRUE;
 197 }
 198
 199 BOOL OnTreeExpanding(HWND hwndTV, NMTREEVIEW* pnmtv)
 200 {
 201     DWORD dwCount, dwIndex, dwMaxSubKeyLen;
 202     HKEY hRoot, hNewKey, hKey;
 203     LPCTSTR keyPath;
 204     LPTSTR Name;
 205     LONG errCode;
 206     HCURSOR hcursorOld;
 207
 208     static int expanding;
 209     if (expanding) return FALSE;
 210     if (pnmtv->itemNew.state & TVIS_EXPANDEDONCE ) {
 211         return TRUE;
 212     }
 213     expanding = TRUE;
 214     hcursorOld = SetCursor(LoadCursor(NULL, IDC_WAIT));
 215     SendMessage(hwndTV, WM_SETREDRAW, FALSE, 0);
 216
 217     keyPath = GetItemPath(hwndTV, pnmtv->itemNew.hItem, &hRoot);
 218     if (!keyPath) goto done;
 219
 220     if (*keyPath) {
 221         errCode = RegOpenKeyEx(hRoot, keyPath, 0, KEY_READ, &hNewKey);
 222         if (errCode != ERROR_SUCCESS) goto done;
 223     } else {
 224         hNewKey = hRoot;
 225     }
 226
 227     errCode = RegQueryInfoKey(hNewKey, 0, 0, 0, &dwCount, &dwMaxSubKeyLen, 0, 0, 0, 0, 0, 0);
 228     if (errCode != ERROR_SUCCESS) goto done;
 229     dwMaxSubKeyLen++; /* account for the \0 terminator */
 230     Name = HeapAlloc(GetProcessHeap(), 0, dwMaxSubKeyLen * sizeof(TCHAR));
 231     if (!Name) goto done;
 232
 233     for (dwIndex = 0; dwIndex < dwCount; dwIndex++) {
 234         DWORD cName = dwMaxSubKeyLen, dwSubCount;
 235         FILETIME LastWriteTime;
 236
 237         errCode = RegEnumKeyEx(hNewKey, dwIndex, Name, &cName, 0, 0, 0, &LastWriteTime);
 238         if (errCode != ERROR_SUCCESS) continue;
 239         errCode = RegOpenKeyEx(hNewKey, Name, 0, KEY_QUERY_VALUE, &hKey);
 240         if (errCode == ERROR_SUCCESS) {
 241             errCode = RegQueryInfoKey(hKey, 0, 0, 0, &dwSubCount, 0, 0, 0, 0, 0, 0, 0);
 242             RegCloseKey(hKey);
 243         }
 244         if (errCode != ERROR_SUCCESS) dwSubCount = 0;
 245         printf("dwSubCount=%ld, Name=%s\n", dwSubCount, Name);
 246         AddEntryToTree(hwndTV, pnmtv->itemNew.hItem, Name, NULL, dwSubCount, TVI_FIRST);
 247     }
 248
 249     SendMessage(hwndTV, TVM_SORTCHILDREN, 0, (LPARAM)pnmtv->itemNew.hItem);
 250
 251     RegCloseKey(hNewKey);
 252     HeapFree(GetProcessHeap(), 0, Name);
 253
 254 done:
 255     SendMessage(hwndTV, WM_SETREDRAW, TRUE, 0);
 256     SetCursor(hcursorOld);
 257     expanding = FALSE;
 258
 259     return TRUE;
 260 }
 261
 262
 263 /*
 264  * CreateTreeView - creates a tree view control.
 265  * Returns the handle to the new control if successful, or NULL otherwise.
 266  * hwndParent - handle to the control's parent window.
 267  */
 268 HWND CreateTreeView(HWND hwndParent, LPTSTR pHostName, int id)
 269 {
 270     RECT rcClient;
 271     HWND hwndTV;
 272
 273     /* Get the dimensions of the parent window's client area, and create the tree view control.  */
 274     GetClientRect(hwndParent, &rcClient);
 275     hwndTV = CreateWindowEx(WS_EX_CLIENTEDGE, WC_TREEVIEW, NULL,
 276                             WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_HASLINES | TVS_HASBUTTONS | TVS_LINESATROOT,
 277                             0, 0, rcClient.right, rcClient.bottom,
 278                             hwndParent, (HMENU)id, hInst, NULL);
 279     /* Initialize the image list, and add items to the control.  */
 280     if (!InitTreeViewImageLists(hwndTV) || !InitTreeViewItems(hwndTV, pHostName)) {
 281         DestroyWindow(hwndTV);
 282         return NULL;
 283     }
 284     return hwndTV;
 285 }