dlls/shell32/changenotify.c

   1 /*
   2  *      shell change notification
   3  *
   4  * Copyright 2000 Juergen Schmied
   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 #include <string.h>
  22
  23 #include "wine/debug.h"
  24 #include "pidl.h"
  25 #include "shell32_main.h"
  26 #include "undocshell.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  29
  30 static CRITICAL_SECTION SHELL32_ChangenotifyCS = CRITICAL_SECTION_INIT("SHELL32_ChangenotifyCS");
  31
  32 /* internal list of notification clients (internal) */
  33 typedef struct _NOTIFICATIONLIST
  34 {
  35         struct _NOTIFICATIONLIST *next;
  36         struct _NOTIFICATIONLIST *prev;
  37         HWND hwnd;              /* window to notify */
  38         DWORD uMsg;             /* message to send */
  39         LPNOTIFYREGISTER apidl; /* array of entries to watch*/
  40         UINT cidl;              /* number of pidls in array */
  41         LONG wEventMask;        /* subscribed events */
  42         DWORD dwFlags;          /* client flags */
  43 } NOTIFICATIONLIST, *LPNOTIFICATIONLIST;
  44
  45 static NOTIFICATIONLIST head;
  46 static NOTIFICATIONLIST tail;
  47
  48 void InitChangeNotifications()
  49 {
  50         TRACE("head=%p tail=%p\n", &head, &tail);
  51         head.next = &tail;
  52         tail.prev = &head;
  53 }
  54
  55 void FreeChangeNotifications()
  56 {
  57         LPNOTIFICATIONLIST ptr, item;
  58
  59         TRACE("\n");
  60
  61         EnterCriticalSection(&SHELL32_ChangenotifyCS);
  62         ptr = head.next;
  63
  64         while(ptr != &tail)
  65         {
  66           int i;
  67           item = ptr;
  68           ptr = ptr->next;
  69
  70           TRACE("item=%p\n", item);
  71
  72           /* free the item */
  73           for (i=0; i<item->cidl;i++) SHFree(item->apidl[i].pidlPath);
  74           SHFree(item->apidl);
  75           SHFree(item);
  76         }
  77         head.next = NULL;
  78         tail.prev = NULL;
  79
  80         LeaveCriticalSection(&SHELL32_ChangenotifyCS);
  81
  82         DeleteCriticalSection(&SHELL32_ChangenotifyCS);
  83 }
  84
  85 static BOOL AddNode(LPNOTIFICATIONLIST item)
  86 {
  87         LPNOTIFICATIONLIST last;
  88
  89         EnterCriticalSection(&SHELL32_ChangenotifyCS);
  90
  91         /* get last entry */
  92         last = tail.prev;
  93
  94         /* link items */
  95         last->next = item;
  96         item->prev = last;
  97         item->next = &tail;
  98         tail.prev = item;
  99         TRACE("item=%p prev=%p next=%p\n", item, item->prev, item->next);
 100
 101         LeaveCriticalSection(&SHELL32_ChangenotifyCS);
 102
 103         return TRUE;
 104 }
 105
 106 static BOOL DeleteNode(LPNOTIFICATIONLIST item)
 107 {
 108         LPNOTIFICATIONLIST ptr;
 109         int ret = FALSE;
 110
 111         TRACE("item=%p\n", item);
 112
 113         EnterCriticalSection(&SHELL32_ChangenotifyCS);
 114
 115         ptr = head.next;
 116         while((ptr != &tail) && (ret == FALSE))
 117         {
 118           TRACE("ptr=%p\n", ptr);
 119
 120           if (ptr == item)
 121           {
 122             int i;
 123
 124             TRACE("item=%p prev=%p next=%p\n", item, item->prev, item->next);
 125
 126             /* remove item from list */
 127             item->prev->next = item->next;
 128             item->next->prev = item->prev;
 129
 130             /* free the item */
 131             for (i=0; i<item->cidl;i++) SHFree(item->apidl[i].pidlPath);
 132             SHFree(item->apidl);
 133             SHFree(item);
 134             ret = TRUE;
 135           }
 136           ptr = ptr->next;
 137         }
 138
 139         LeaveCriticalSection(&SHELL32_ChangenotifyCS);
 140         return ret;
 141
 142 }
 143
 144 /*************************************************************************
 145  * SHChangeNotifyRegister                       [SHELL32.2]
 146  *
 147  */
 148 HANDLE WINAPI
 149 SHChangeNotifyRegister(
 150     HWND hwnd,
 151     LONG dwFlags,
 152     LONG wEventMask,
 153     DWORD uMsg,
 154     int cItems,
 155     LPCNOTIFYREGISTER lpItems)
 156 {
 157         LPNOTIFICATIONLIST item;
 158         int i;
 159
 160         item = SHAlloc(sizeof(NOTIFICATIONLIST));
 161
 162         TRACE("(0x%04x,0x%08lx,0x%08lx,0x%08lx,0x%08x,%p) item=%p\n",
 163                 hwnd,dwFlags,wEventMask,uMsg,cItems,lpItems,item);
 164
 165         item->next = NULL;
 166         item->prev = NULL;
 167         item->cidl = cItems;
 168         item->apidl = SHAlloc(sizeof(NOTIFYREGISTER) * cItems);
 169         for(i=0;i<cItems;i++)
 170         {
 171           item->apidl[i].pidlPath = ILClone(lpItems[i].pidlPath);
 172           item->apidl[i].bWatchSubtree = lpItems[i].bWatchSubtree;
 173         }
 174         item->hwnd = hwnd;
 175         item->uMsg = uMsg;
 176         item->wEventMask = wEventMask;
 177         item->dwFlags = dwFlags;
 178         AddNode(item);
 179         return (HANDLE)item;
 180 }
 181
 182 /*************************************************************************
 183  * SHChangeNotifyDeregister                     [SHELL32.4]
 184  */
 185 BOOL WINAPI
 186 SHChangeNotifyDeregister(
 187         HANDLE hNotify)
 188 {
 189         TRACE("(0x%08x)\n",hNotify);
 190
 191         return DeleteNode((LPNOTIFICATIONLIST)hNotify);;
 192 }
 193
 194 /*************************************************************************
 195  * SHChangeNotifyUpdateEntryList                [SHELL32.5]
 196  */
 197 BOOL WINAPI
 198 SHChangeNotifyUpdateEntryList(DWORD unknown1, DWORD unknown2,
 199                               DWORD unknown3, DWORD unknown4)
 200 {
 201         FIXME("(0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx)\n",
 202               unknown1, unknown2, unknown3, unknown4);
 203
 204         return -1;
 205 }
 206
 207 /*************************************************************************
 208  * SHChangeNotify                               [SHELL32.@]
 209  */
 210 void WINAPI SHChangeNotifyW (LONG wEventId, UINT  uFlags, LPCVOID dwItem1, LPCVOID dwItem2)
 211 {
 212         LPITEMIDLIST pidl1=(LPITEMIDLIST)dwItem1, pidl2=(LPITEMIDLIST)dwItem2;
 213         LPNOTIFICATIONLIST ptr;
 214
 215         TRACE("(0x%08lx,0x%08x,%p,%p):stub.\n", wEventId,uFlags,dwItem1,dwItem2);
 216
 217         /* convert paths in IDLists*/
 218         if(uFlags & SHCNF_PATHA)
 219         {
 220           DWORD dummy;
 221           if (dwItem1) SHILCreateFromPathA((LPCSTR)dwItem1, &pidl1, &dummy);
 222           if (dwItem2) SHILCreateFromPathA((LPCSTR)dwItem2, &pidl2, &dummy);
 223         }
 224
 225         EnterCriticalSection(&SHELL32_ChangenotifyCS);
 226
 227         /* loop through the list */
 228         ptr = head.next;
 229         while(ptr != &tail)
 230         {
 231           TRACE("trying %p\n", ptr);
 232
 233           if(wEventId & ptr->wEventMask)
 234           {
 235             TRACE("notifying\n");
 236             SendMessageA(ptr->hwnd, ptr->uMsg, (WPARAM)pidl1, (LPARAM)pidl2);
 237           }
 238           ptr = ptr->next;
 239         }
 240
 241         LeaveCriticalSection(&SHELL32_ChangenotifyCS);
 242
 243         if(uFlags & SHCNF_PATHA)
 244         {
 245             if (pidl1) SHFree(pidl1);
 246             if (pidl2) SHFree(pidl2);
 247         }
 248 }
 249
 250 /*************************************************************************
 251  * SHChangeNotify                               [SHELL32.@]
 252  */
 253 void WINAPI SHChangeNotifyA (LONG wEventId, UINT  uFlags, LPCVOID dwItem1, LPCVOID dwItem2)
 254 {
 255         LPITEMIDLIST Pidls[2];
 256         LPNOTIFICATIONLIST ptr;
 257
 258         Pidls[0] = (LPITEMIDLIST)dwItem1;
 259         Pidls[1] = (LPITEMIDLIST)dwItem2;
 260
 261         TRACE("(0x%08lx,0x%08x,%p,%p):stub.\n", wEventId,uFlags,dwItem1,dwItem2);
 262
 263         /* convert paths in IDLists*/
 264         if(uFlags & SHCNF_PATHA)
 265         {
 266           DWORD dummy;
 267           if (Pidls[0]) SHILCreateFromPathA((LPCSTR)dwItem1, &Pidls[0], &dummy);
 268           if (Pidls[1]) SHILCreateFromPathA((LPCSTR)dwItem2, &Pidls[1], &dummy);
 269         }
 270
 271         EnterCriticalSection(&SHELL32_ChangenotifyCS);
 272
 273         /* loop through the list */
 274         ptr = head.next;
 275         while(ptr != &tail)
 276         {
 277           TRACE("trying %p\n", ptr);
 278
 279           if(wEventId & ptr->wEventMask)
 280           {
 281             TRACE("notifying\n");
 282             SendMessageA(ptr->hwnd, ptr->uMsg, (WPARAM)&Pidls, (LPARAM)wEventId);
 283           }
 284           ptr = ptr->next;
 285         }
 286
 287         LeaveCriticalSection(&SHELL32_ChangenotifyCS);
 288
 289         /* if we allocated it, free it */
 290         if(uFlags & SHCNF_PATHA)
 291         {
 292             if (Pidls[0]) SHFree(Pidls[0]);
 293             if (Pidls[1]) SHFree(Pidls[1]);
 294         }
 295 }
 296
 297 /*************************************************************************
 298  * SHChangeNotify                               [SHELL32.@]
 299  */
 300 void WINAPI SHChangeNotifyAW (LONG wEventId, UINT  uFlags, LPCVOID dwItem1, LPCVOID dwItem2)
 301 {
 302         if(SHELL_OsIsUnicode())
 303           SHChangeNotifyW (wEventId, uFlags, dwItem1, dwItem2);
 304         else
 305           SHChangeNotifyA (wEventId, uFlags, dwItem1, dwItem2);
 306 }
 307
 308 /*************************************************************************
 309  * NTSHChangeNotifyRegister                     [SHELL32.640]
 310  * NOTES
 311  *   Idlist is an array of structures and Count specifies how many items in the array
 312  *   (usually just one I think).
 313  */
 314 DWORD WINAPI NTSHChangeNotifyRegister(
 315     HWND hwnd,
 316     LONG events1,
 317     LONG events2,
 318     DWORD msg,
 319     int count,
 320     LPNOTIFYREGISTER idlist)
 321 {
 322         FIXME("(0x%04x,0x%08lx,0x%08lx,0x%08lx,0x%08x,%p):stub.\n",
 323                 hwnd,events1,events2,msg,count,idlist);
 324         return 0;
 325 }
 326
 327 /*************************************************************************
 328  * SHChangeNotification_Lock                    [SHELL32.644]
 329  */
 330 HANDLE WINAPI SHChangeNotification_Lock(
 331         HANDLE hMemoryMap,
 332         DWORD dwProcessId,
 333         LPCITEMIDLIST **lppidls,
 334         LPLONG lpwEventId)
 335 {
 336         FIXME("\n");
 337         return 0;
 338 }
 339
 340 /*************************************************************************
 341  * SHChangeNotification_Unlock                  [SHELL32.645]
 342  */
 343 BOOL WINAPI SHChangeNotification_Unlock (
 344         HANDLE hLock)
 345 {
 346         FIXME("\n");
 347         return 0;
 348 }
 349
 350 /*************************************************************************
 351  * NTSHChangeNotifyDeregister                   [SHELL32.641]
 352  */
 353 DWORD WINAPI NTSHChangeNotifyDeregister(LONG x1)
 354 {
 355         FIXME("(0x%08lx):stub.\n",x1);
 356         return 0;
 357 }
 358