dlls/user32/hook.c

   1 /*
   2  * Windows hook functions
   3  *
   4  * Copyright 2002 Alexandre Julliard
   5  * Copyright 2005 Dmitry Timoshkov
   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  * NOTES:
  22  *   Status of the various hooks:
  23  *     WH_MSGFILTER                 OK
  24  *     WH_JOURNALRECORD             Partially implemented
  25  *     WH_JOURNALPLAYBACK           Partially implemented
  26  *     WH_KEYBOARD                  OK
  27  *     WH_GETMESSAGE                OK (FIXME: A/W mapping?)
  28  *     WH_CALLWNDPROC               OK (FIXME: A/W mapping?)
  29  *     WH_CBT
  30  *       HCBT_MOVESIZE              OK
  31  *       HCBT_MINMAX                OK
  32  *       HCBT_QS                    OK
  33  *       HCBT_CREATEWND             OK
  34  *       HCBT_DESTROYWND            OK
  35  *       HCBT_ACTIVATE              OK
  36  *       HCBT_CLICKSKIPPED          OK
  37  *       HCBT_KEYSKIPPED            OK
  38  *       HCBT_SYSCOMMAND            OK
  39  *       HCBT_SETFOCUS              OK
  40  *     WH_SYSMSGFILTER              OK
  41  *     WH_MOUSE                     OK
  42  *     WH_HARDWARE                  Not supported in Win32
  43  *     WH_DEBUG                     Not implemented
  44  *     WH_SHELL
  45  *       HSHELL_WINDOWCREATED       OK
  46  *       HSHELL_WINDOWDESTROYED     OK
  47  *       HSHELL_ACTIVATESHELLWINDOW Not implemented
  48  *       HSHELL_WINDOWACTIVATED     Not implemented
  49  *       HSHELL_GETMINRECT          Not implemented
  50  *       HSHELL_REDRAW              Not implemented
  51  *       HSHELL_TASKMAN             Not implemented
  52  *       HSHELL_LANGUAGE            Not implemented
  53  *       HSHELL_SYSMENU             Not implemented
  54  *       HSHELL_ENDTASK             Not implemented
  55  *       HSHELL_ACCESSIBILITYSTATE  Not implemented
  56  *       HSHELL_APPCOMMAND          Not implemented
  57  *       HSHELL_WINDOWREPLACED      Not implemented
  58  *       HSHELL_WINDOWREPLACING     Not implemented
  59  *     WH_FOREGROUNDIDLE            Not implemented
  60  *     WH_CALLWNDPROCRET            OK (FIXME: A/W mapping?)
  61  *     WH_KEYBOARD_LL               Implemented but should use SendMessage instead
  62  *     WH_MOUSE_LL                  Implemented but should use SendMessage instead
  63  */
  64
  65 #include "config.h"
  66 #include "wine/port.h"
  67
  68 #include <stdarg.h>
  69 #include <assert.h>
  70
  71 #include "windef.h"
  72 #include "winbase.h"
  73 #include "wingdi.h"
  74 #include "winuser.h"
  75 #include "winerror.h"
  76 #include "win.h"
  77 #include "user_private.h"
  78 #include "wine/server.h"
  79 #include "wine/unicode.h"
  80 #include "wine/debug.h"
  81 #include "winternl.h"
  82
  83 WINE_DEFAULT_DEBUG_CHANNEL(hook);
  84 WINE_DECLARE_DEBUG_CHANNEL(relay);
  85
  86 struct hook_info
  87 {
  88     INT id;
  89     void *proc;
  90     void *handle;
  91     DWORD pid, tid;
  92     BOOL prev_unicode, next_unicode;
  93     WCHAR module[MAX_PATH];
  94 };
  95
  96 #define WH_WINEVENT (WH_MAXHOOK+1)
  97
  98 static const char * const hook_names[WH_WINEVENT - WH_MINHOOK + 1] =
  99 {
 100     "WH_MSGFILTER",
 101     "WH_JOURNALRECORD",
 102     "WH_JOURNALPLAYBACK",
 103     "WH_KEYBOARD",
 104     "WH_GETMESSAGE",
 105     "WH_CALLWNDPROC",
 106     "WH_CBT",
 107     "WH_SYSMSGFILTER",
 108     "WH_MOUSE",
 109     "WH_HARDWARE",
 110     "WH_DEBUG",
 111     "WH_SHELL",
 112     "WH_FOREGROUNDIDLE",
 113     "WH_CALLWNDPROCRET",
 114     "WH_KEYBOARD_LL",
 115     "WH_MOUSE_LL",
 116     "WH_WINEVENT"
 117 };
 118
 119
 120 /***********************************************************************
 121  *              get_ll_hook_timeout
 122  *
 123  */
 124 static UINT get_ll_hook_timeout(void)
 125 {
 126     /* FIXME: should retrieve LowLevelHooksTimeout in HKEY_CURRENT_USER\Control Panel\Desktop */
 127     return 2000;
 128 }
 129
 130
 131 /***********************************************************************
 132  *              set_windows_hook
 133  *
 134  * Implementation of SetWindowsHookExA and SetWindowsHookExW.
 135  */
 136 static HHOOK set_windows_hook( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid, BOOL unicode )
 137 {
 138     HHOOK handle = 0;
 139     WCHAR module[MAX_PATH];
 140     DWORD len;
 141
 142     if (!proc)
 143     {
 144         SetLastError( ERROR_INVALID_FILTER_PROC );
 145         return 0;
 146     }
 147
 148     if (tid)  /* thread-local hook */
 149     {
 150         if (id == WH_JOURNALRECORD ||
 151             id == WH_JOURNALPLAYBACK ||
 152             id == WH_KEYBOARD_LL ||
 153             id == WH_MOUSE_LL ||
 154             id == WH_SYSMSGFILTER)
 155         {
 156             /* these can only be global */
 157             SetLastError( ERROR_INVALID_PARAMETER );
 158             return 0;
 159         }
 160     }
 161     else  /* system-global hook */
 162     {
 163         if (id == WH_KEYBOARD_LL || id == WH_MOUSE_LL) inst = 0;
 164         else if (!inst)
 165         {
 166             SetLastError( ERROR_HOOK_NEEDS_HMOD );
 167             return 0;
 168         }
 169     }
 170
 171     if (inst && (!(len = GetModuleFileNameW( inst, module, MAX_PATH )) || len >= MAX_PATH))
 172     {
 173         SetLastError( ERROR_INVALID_PARAMETER );
 174         return 0;
 175     }
 176
 177     SERVER_START_REQ( set_hook )
 178     {
 179         req->id        = id;
 180         req->pid       = 0;
 181         req->tid       = tid;
 182         req->event_min = EVENT_MIN;
 183         req->event_max = EVENT_MAX;
 184         req->flags     = WINEVENT_INCONTEXT;
 185         req->unicode   = unicode;
 186         if (inst) /* make proc relative to the module base */
 187         {
 188             req->proc = wine_server_client_ptr( (void *)((char *)proc - (char *)inst) );
 189             wine_server_add_data( req, module, strlenW(module) * sizeof(WCHAR) );
 190         }
 191         else req->proc = wine_server_client_ptr( proc );
 192
 193         if (!wine_server_call_err( req ))
 194         {
 195             handle = wine_server_ptr_handle( reply->handle );
 196             get_user_thread_info()->active_hooks = reply->active_hooks;
 197         }
 198     }
 199     SERVER_END_REQ;
 200
 201     TRACE( "%s %p %x -> %p\n", hook_names[id-WH_MINHOOK], proc, tid, handle );
 202     return handle;
 203 }
 204
 205 #ifdef __i386__
 206 /* Some apps pass a non-stdcall proc to SetWindowsHookExA,
 207  * so we need a small assembly wrapper to call the proc.
 208  */
 209 extern LRESULT HOOKPROC_wrapper( HOOKPROC proc,
 210                                  INT code, WPARAM wParam, LPARAM lParam );
 211 __ASM_GLOBAL_FUNC( HOOKPROC_wrapper,
 212                    "pushl %ebp\n\t"
 213                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 214                    __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
 215                    "movl %esp,%ebp\n\t"
 216                    __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
 217                    "pushl %edi\n\t"
 218                    __ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
 219                    "pushl %esi\n\t"
 220                    __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
 221                    "pushl %ebx\n\t"
 222                    __ASM_CFI(".cfi_rel_offset %ebx,-12\n\t")
 223                    "pushl 20(%ebp)\n\t"
 224                    "pushl 16(%ebp)\n\t"
 225                    "pushl 12(%ebp)\n\t"
 226                    "movl 8(%ebp),%eax\n\t"
 227                    "call *%eax\n\t"
 228                    "leal -12(%ebp),%esp\n\t"
 229                    "popl %ebx\n\t"
 230                    __ASM_CFI(".cfi_same_value %ebx\n\t")
 231                    "popl %esi\n\t"
 232                    __ASM_CFI(".cfi_same_value %esi\n\t")
 233                    "popl %edi\n\t"
 234                    __ASM_CFI(".cfi_same_value %edi\n\t")
 235                    "leave\n\t"
 236                    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
 237                    __ASM_CFI(".cfi_same_value %ebp\n\t")
 238                    "ret" )
 239 #else
 240 static inline LRESULT HOOKPROC_wrapper( HOOKPROC proc,
 241                                  INT code, WPARAM wParam, LPARAM lParam )
 242 {
 243     return proc( code, wParam, lParam );
 244 }
 245 #endif  /* __i386__ */
 246
 247
 248 /***********************************************************************
 249  *              call_hook_AtoW
 250  */
 251 static LRESULT call_hook_AtoW( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam )
 252 {
 253     LRESULT ret;
 254     UNICODE_STRING usBuffer;
 255     if (id != WH_CBT || code != HCBT_CREATEWND)
 256         ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
 257     else
 258     {
 259         CBT_CREATEWNDA *cbtcwA = (CBT_CREATEWNDA *)lparam;
 260         CBT_CREATEWNDW cbtcwW;
 261         CREATESTRUCTW csW;
 262         LPWSTR nameW = NULL;
 263         LPWSTR classW = NULL;
 264
 265         cbtcwW.lpcs = &csW;
 266         cbtcwW.hwndInsertAfter = cbtcwA->hwndInsertAfter;
 267         csW = *(CREATESTRUCTW *)cbtcwA->lpcs;
 268
 269         if (!IS_INTRESOURCE(cbtcwA->lpcs->lpszName))
 270         {
 271             RtlCreateUnicodeStringFromAsciiz(&usBuffer,cbtcwA->lpcs->lpszName);
 272             csW.lpszName = nameW = usBuffer.Buffer;
 273         }
 274         if (!IS_INTRESOURCE(cbtcwA->lpcs->lpszClass))
 275         {
 276             RtlCreateUnicodeStringFromAsciiz(&usBuffer,cbtcwA->lpcs->lpszClass);
 277             csW.lpszClass = classW = usBuffer.Buffer;
 278         }
 279         ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwW );
 280         cbtcwA->hwndInsertAfter = cbtcwW.hwndInsertAfter;
 281         HeapFree( GetProcessHeap(), 0, nameW );
 282         HeapFree( GetProcessHeap(), 0, classW );
 283     }
 284     return ret;
 285 }
 286
 287
 288 /***********************************************************************
 289  *              call_hook_WtoA
 290  */
 291 static LRESULT call_hook_WtoA( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam )
 292 {
 293     LRESULT ret;
 294
 295     if (id != WH_CBT || code != HCBT_CREATEWND)
 296         ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
 297     else
 298     {
 299         CBT_CREATEWNDW *cbtcwW = (CBT_CREATEWNDW *)lparam;
 300         CBT_CREATEWNDA cbtcwA;
 301         CREATESTRUCTA csA;
 302         int len;
 303         LPSTR nameA = NULL;
 304         LPSTR classA = NULL;
 305
 306         cbtcwA.lpcs = &csA;
 307         cbtcwA.hwndInsertAfter = cbtcwW->hwndInsertAfter;
 308         csA = *(CREATESTRUCTA *)cbtcwW->lpcs;
 309
 310         if (!IS_INTRESOURCE(cbtcwW->lpcs->lpszName)) {
 311             len = WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszName, -1, NULL, 0, NULL, NULL );
 312             nameA = HeapAlloc( GetProcessHeap(), 0, len*sizeof(CHAR) );
 313             WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszName, -1, nameA, len, NULL, NULL );
 314             csA.lpszName = nameA;
 315         }
 316
 317         if (!IS_INTRESOURCE(cbtcwW->lpcs->lpszClass)) {
 318             len = WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszClass, -1, NULL, 0, NULL, NULL );
 319             classA = HeapAlloc( GetProcessHeap(), 0, len*sizeof(CHAR) );
 320             WideCharToMultiByte( CP_ACP, 0, cbtcwW->lpcs->lpszClass, -1, classA, len, NULL, NULL );
 321             csA.lpszClass = classA;
 322         }
 323
 324         ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwA );
 325         cbtcwW->hwndInsertAfter = cbtcwA.hwndInsertAfter;
 326         HeapFree( GetProcessHeap(), 0, nameA );
 327         HeapFree( GetProcessHeap(), 0, classA );
 328     }
 329     return ret;
 330 }
 331
 332
 333 /***********************************************************************
 334  *              call_hook_proc
 335  */
 336 static LRESULT call_hook_proc( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM lparam,
 337                                BOOL prev_unicode, BOOL next_unicode )
 338 {
 339     LRESULT ret;
 340
 341     if (TRACE_ON(relay))
 342         DPRINTF( "%04x:Call hook proc %p (id=%s,code=%x,wp=%08lx,lp=%08lx)\n",
 343                  GetCurrentThreadId(), proc, hook_names[id-WH_MINHOOK], code, wparam, lparam );
 344
 345     if (!prev_unicode == !next_unicode) ret = proc( code, wparam, lparam );
 346     else if (prev_unicode) ret = call_hook_WtoA( proc, id, code, wparam, lparam );
 347     else ret = call_hook_AtoW( proc, id, code, wparam, lparam );
 348
 349     if (TRACE_ON(relay))
 350         DPRINTF( "%04x:Ret  hook proc %p (id=%s,code=%x,wp=%08lx,lp=%08lx) retval=%08lx\n",
 351                  GetCurrentThreadId(), proc, hook_names[id-WH_MINHOOK], code, wparam, lparam, ret );
 352
 353     return ret;
 354 }
 355
 356
 357 /***********************************************************************
 358  *              get_hook_proc
 359  *
 360  * Retrieve the hook procedure real value for a module-relative proc
 361  */
 362 void *get_hook_proc( void *proc, const WCHAR *module, HMODULE *free_module )
 363 {
 364     HMODULE mod;
 365
 366     GetModuleHandleExW( 0, module, &mod );
 367     *free_module = mod;
 368     if (!mod)
 369     {
 370         TRACE( "loading %s\n", debugstr_w(module) );
 371         /* FIXME: the library will never be freed */
 372         if (!(mod = LoadLibraryExW(module, NULL, LOAD_WITH_ALTERED_SEARCH_PATH))) return NULL;
 373     }
 374     return (char *)mod + (ULONG_PTR)proc;
 375 }
 376
 377 /***********************************************************************
 378  *              call_hook
 379  *
 380  * Call hook either in current thread or send message to the destination
 381  * thread.
 382  */
 383 static LRESULT call_hook( struct hook_info *info, INT code, WPARAM wparam, LPARAM lparam )
 384 {
 385     DWORD_PTR ret = 0;
 386
 387     if (info->tid)
 388     {
 389         struct hook_extra_info h_extra;
 390         h_extra.handle = info->handle;
 391         h_extra.lparam = lparam;
 392
 393         TRACE( "calling hook in thread %04x %s code %x wp %lx lp %lx\n",
 394                info->tid, hook_names[info->id-WH_MINHOOK], code, wparam, lparam );
 395
 396         switch(info->id)
 397         {
 398         case WH_KEYBOARD_LL:
 399             MSG_SendInternalMessageTimeout( info->pid, info->tid, WM_WINE_KEYBOARD_LL_HOOK,
 400                                             wparam, (LPARAM)&h_extra, SMTO_ABORTIFHUNG,
 401                                             get_ll_hook_timeout(), &ret );
 402             break;
 403         case WH_MOUSE_LL:
 404             MSG_SendInternalMessageTimeout( info->pid, info->tid, WM_WINE_MOUSE_LL_HOOK,
 405                                             wparam, (LPARAM)&h_extra, SMTO_ABORTIFHUNG,
 406                                             get_ll_hook_timeout(), &ret );
 407             break;
 408         default:
 409             ERR("Unknown hook id %d\n", info->id);
 410             assert(0);
 411             break;
 412         }
 413     }
 414     else if (info->proc)
 415     {
 416         HMODULE free_module = 0;
 417         TRACE( "calling hook %p %s code %x wp %lx lp %lx module %s\n",
 418                info->proc, hook_names[info->id-WH_MINHOOK], code, wparam,
 419                lparam, debugstr_w(info->module) );
 420
 421         if (!info->module[0] ||
 422             (info->proc = get_hook_proc( info->proc, info->module, &free_module )) != NULL)
 423         {
 424             struct user_thread_info *thread_info = get_user_thread_info();
 425             HHOOK prev = thread_info->hook;
 426             BOOL prev_unicode = thread_info->hook_unicode;
 427
 428             thread_info->hook = info->handle;
 429             thread_info->hook_unicode = info->next_unicode;
 430             ret = call_hook_proc( info->proc, info->id, code, wparam, lparam,
 431                                   info->prev_unicode, info->next_unicode );
 432             thread_info->hook = prev;
 433             thread_info->hook_unicode = prev_unicode;
 434
 435             if (free_module) FreeLibrary(free_module);
 436         }
 437     }
 438
 439     if (info->id == WH_KEYBOARD_LL || info->id == WH_MOUSE_LL)
 440         get_user_thread_info()->key_state_time = 0;  /* force refreshing the key state cache */
 441
 442     return ret;
 443 }
 444
 445
 446 /***********************************************************************
 447  *           HOOK_IsHooked
 448  */
 449 static BOOL HOOK_IsHooked( INT id )
 450 {
 451     struct user_thread_info *thread_info = get_user_thread_info();
 452
 453     if (!thread_info->active_hooks) return TRUE;
 454     return (thread_info->active_hooks & (1 << (id - WH_MINHOOK))) != 0;
 455 }
 456
 457
 458 /***********************************************************************
 459  *              HOOK_CallHooks
 460  */
 461 LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL unicode )
 462 {
 463     struct user_thread_info *thread_info = get_user_thread_info();
 464     struct hook_info info;
 465     DWORD_PTR ret = 0;
 466
 467     USER_CheckNotLock();
 468
 469     if (!HOOK_IsHooked( id ))
 470     {
 471         TRACE( "skipping hook %s mask %x\n", hook_names[id-WH_MINHOOK], thread_info->active_hooks );
 472         return 0;
 473     }
 474
 475     ZeroMemory( &info, sizeof(info) - sizeof(info.module) );
 476     info.prev_unicode = unicode;
 477     info.id = id;
 478
 479     SERVER_START_REQ( start_hook_chain )
 480     {
 481         req->id = info.id;
 482         req->event = EVENT_MIN;
 483         wine_server_set_reply( req, info.module, sizeof(info.module)-sizeof(WCHAR) );
 484         if (!wine_server_call( req ))
 485         {
 486             info.module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
 487             info.handle       = wine_server_ptr_handle( reply->handle );
 488             info.pid          = reply->pid;
 489             info.tid          = reply->tid;
 490             info.proc         = wine_server_get_ptr( reply->proc );
 491             info.next_unicode = reply->unicode;
 492             thread_info->active_hooks = reply->active_hooks;
 493         }
 494     }
 495     SERVER_END_REQ;
 496
 497     if (!info.tid && !info.proc) return 0;
 498     ret = call_hook( &info, code, wparam, lparam );
 499
 500     SERVER_START_REQ( finish_hook_chain )
 501     {
 502         req->id = id;
 503         wine_server_call( req );
 504     }
 505     SERVER_END_REQ;
 506     return ret;
 507 }
 508
 509
 510 /***********************************************************************
 511  *              SetWindowsHookA (USER32.@)
 512  */
 513 HHOOK WINAPI SetWindowsHookA( INT id, HOOKPROC proc )
 514 {
 515     return SetWindowsHookExA( id, proc, 0, GetCurrentThreadId() );
 516 }
 517
 518
 519 /***********************************************************************
 520  *              SetWindowsHookW (USER32.@)
 521  */
 522 HHOOK WINAPI SetWindowsHookW( INT id, HOOKPROC proc )
 523 {
 524     return SetWindowsHookExW( id, proc, 0, GetCurrentThreadId() );
 525 }
 526
 527
 528 /***********************************************************************
 529  *              SetWindowsHookExA (USER32.@)
 530  */
 531 HHOOK WINAPI SetWindowsHookExA( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid )
 532 {
 533     return set_windows_hook( id, proc, inst, tid, FALSE );
 534 }
 535
 536 /***********************************************************************
 537  *              SetWindowsHookExW (USER32.@)
 538  */
 539 HHOOK WINAPI SetWindowsHookExW( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid )
 540 {
 541     return set_windows_hook( id, proc, inst, tid, TRUE );
 542 }
 543
 544
 545 /***********************************************************************
 546  *              UnhookWindowsHook (USER32.@)
 547  */
 548 BOOL WINAPI UnhookWindowsHook( INT id, HOOKPROC proc )
 549 {
 550     BOOL ret;
 551
 552     TRACE( "%s %p\n", hook_names[id-WH_MINHOOK], proc );
 553
 554     SERVER_START_REQ( remove_hook )
 555     {
 556         req->handle = 0;
 557         req->id   = id;
 558         req->proc = wine_server_client_ptr( proc );
 559         ret = !wine_server_call_err( req );
 560         if (ret) get_user_thread_info()->active_hooks = reply->active_hooks;
 561     }
 562     SERVER_END_REQ;
 563     if (!ret && GetLastError() == ERROR_INVALID_HANDLE) SetLastError( ERROR_INVALID_HOOK_HANDLE );
 564     return ret;
 565 }
 566
 567
 568
 569 /***********************************************************************
 570  *              UnhookWindowsHookEx (USER32.@)
 571  */
 572 BOOL WINAPI UnhookWindowsHookEx( HHOOK hhook )
 573 {
 574     BOOL ret;
 575
 576     SERVER_START_REQ( remove_hook )
 577     {
 578         req->handle = wine_server_user_handle( hhook );
 579         req->id     = 0;
 580         ret = !wine_server_call_err( req );
 581         if (ret) get_user_thread_info()->active_hooks = reply->active_hooks;
 582     }
 583     SERVER_END_REQ;
 584     if (!ret && GetLastError() == ERROR_INVALID_HANDLE) SetLastError( ERROR_INVALID_HOOK_HANDLE );
 585     return ret;
 586 }
 587
 588
 589 /***********************************************************************
 590  *              CallNextHookEx (USER32.@)
 591  */
 592 LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam )
 593 {
 594     struct user_thread_info *thread_info = get_user_thread_info();
 595     struct hook_info info;
 596
 597     ZeroMemory( &info, sizeof(info) - sizeof(info.module) );
 598
 599     SERVER_START_REQ( get_hook_info )
 600     {
 601         req->handle = wine_server_user_handle( thread_info->hook );
 602         req->get_next = 1;
 603         req->event = EVENT_MIN;
 604         wine_server_set_reply( req, info.module, sizeof(info.module)-sizeof(WCHAR) );
 605         if (!wine_server_call_err( req ))
 606         {
 607             info.module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
 608             info.handle       = wine_server_ptr_handle( reply->handle );
 609             info.id           = reply->id;
 610             info.pid          = reply->pid;
 611             info.tid          = reply->tid;
 612             info.proc         = wine_server_get_ptr( reply->proc );
 613             info.next_unicode = reply->unicode;
 614         }
 615     }
 616     SERVER_END_REQ;
 617
 618     info.prev_unicode = thread_info->hook_unicode;
 619     return call_hook( &info, code, wparam, lparam );
 620 }
 621
 622
 623 LRESULT call_current_hook( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam )
 624 {
 625     struct hook_info info;
 626
 627     ZeroMemory( &info, sizeof(info) - sizeof(info.module) );
 628
 629     SERVER_START_REQ( get_hook_info )
 630     {
 631         req->handle = wine_server_user_handle( hhook );
 632         req->get_next = 0;
 633         req->event = EVENT_MIN;
 634         wine_server_set_reply( req, info.module, sizeof(info.module)-sizeof(WCHAR) );
 635         if (!wine_server_call_err( req ))
 636         {
 637             info.module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
 638             info.handle       = wine_server_ptr_handle( reply->handle );
 639             info.id           = reply->id;
 640             info.pid          = reply->pid;
 641             info.tid          = reply->tid;
 642             info.proc         = wine_server_get_ptr( reply->proc );
 643             info.next_unicode = reply->unicode;
 644         }
 645     }
 646     SERVER_END_REQ;
 647
 648     info.prev_unicode = TRUE;  /* assume Unicode for this function */
 649     return call_hook( &info, code, wparam, lparam );
 650 }
 651
 652 /***********************************************************************
 653  *              CallMsgFilterA (USER32.@)
 654  */
 655 BOOL WINAPI CallMsgFilterA( LPMSG msg, INT code )
 656 {
 657     if (HOOK_CallHooks( WH_SYSMSGFILTER, code, 0, (LPARAM)msg, FALSE )) return TRUE;
 658     return HOOK_CallHooks( WH_MSGFILTER, code, 0, (LPARAM)msg, FALSE );
 659 }
 660
 661
 662 /***********************************************************************
 663  *              CallMsgFilterW (USER32.@)
 664  */
 665 BOOL WINAPI CallMsgFilterW( LPMSG msg, INT code )
 666 {
 667     if (HOOK_CallHooks( WH_SYSMSGFILTER, code, 0, (LPARAM)msg, TRUE )) return TRUE;
 668     return HOOK_CallHooks( WH_MSGFILTER, code, 0, (LPARAM)msg, TRUE );
 669 }
 670
 671
 672 /***********************************************************************
 673  *           SetWinEventHook                            [USER32.@]
 674  *
 675  * Set up an event hook for a set of events.
 676  *
 677  * PARAMS
 678  *  event_min [I] Lowest event handled by pfnProc
 679  *  event_max [I] Highest event handled by pfnProc
 680  *  inst      [I] DLL containing pfnProc
 681  *  proc      [I] Callback event hook function
 682  *  pid       [I] Process to get events from, or 0 for all processes
 683  *  tid       [I] Thread to get events from, or 0 for all threads
 684  *  flags     [I] Flags indicating the status of pfnProc
 685  *
 686  * RETURNS
 687  *  Success: A handle representing the hook.
 688  *  Failure: A NULL handle.
 689  */
 690 HWINEVENTHOOK WINAPI SetWinEventHook(DWORD event_min, DWORD event_max,
 691                                      HMODULE inst, WINEVENTPROC proc,
 692                                      DWORD pid, DWORD tid, DWORD flags)
 693 {
 694     HWINEVENTHOOK handle = 0;
 695     WCHAR module[MAX_PATH];
 696     DWORD len;
 697
 698     TRACE("%d,%d,%p,%p,%08x,%04x,%08x\n", event_min, event_max, inst,
 699           proc, pid, tid, flags);
 700
 701     if (inst)
 702     {
 703         if (!(len = GetModuleFileNameW(inst, module, MAX_PATH)) || len >= MAX_PATH)
 704             inst = 0;
 705     }
 706
 707     if ((flags & WINEVENT_INCONTEXT) && !inst)
 708     {
 709         SetLastError(ERROR_HOOK_NEEDS_HMOD);
 710         return 0;
 711     }
 712
 713     if (event_min > event_max)
 714     {
 715         SetLastError(ERROR_INVALID_HOOK_FILTER);
 716         return 0;
 717     }
 718
 719     /* FIXME: what if the tid or pid belongs to another process? */
 720     if (tid)  /* thread-local hook */
 721         inst = 0;
 722
 723     SERVER_START_REQ( set_hook )
 724     {
 725         req->id        = WH_WINEVENT;
 726         req->pid       = pid;
 727         req->tid       = tid;
 728         req->event_min = event_min;
 729         req->event_max = event_max;
 730         req->flags     = flags;
 731         req->unicode   = 1;
 732         if (inst) /* make proc relative to the module base */
 733         {
 734             req->proc = wine_server_client_ptr( (void *)((char *)proc - (char *)inst) );
 735             wine_server_add_data( req, module, strlenW(module) * sizeof(WCHAR) );
 736         }
 737         else req->proc = wine_server_client_ptr( proc );
 738
 739         if (!wine_server_call_err( req ))
 740         {
 741             handle = wine_server_ptr_handle( reply->handle );
 742             get_user_thread_info()->active_hooks = reply->active_hooks;
 743         }
 744     }
 745     SERVER_END_REQ;
 746
 747     TRACE("-> %p\n", handle);
 748     return handle;
 749 }
 750
 751
 752 /***********************************************************************
 753  *           UnhookWinEvent                             [USER32.@]
 754  *
 755  * Remove an event hook for a set of events.
 756  *
 757  * PARAMS
 758  *  hEventHook [I] Event hook to remove
 759  *
 760  * RETURNS
 761  *  Success: TRUE. The event hook has been removed.
 762  *  Failure: FALSE, if hEventHook is invalid.
 763  */
 764 BOOL WINAPI UnhookWinEvent(HWINEVENTHOOK hEventHook)
 765 {
 766     BOOL ret;
 767
 768     SERVER_START_REQ( remove_hook )
 769     {
 770         req->handle = wine_server_user_handle( hEventHook );
 771         req->id     = WH_WINEVENT;
 772         ret = !wine_server_call_err( req );
 773         if (ret) get_user_thread_info()->active_hooks = reply->active_hooks;
 774     }
 775     SERVER_END_REQ;
 776     return ret;
 777 }
 778
 779 static inline BOOL find_first_hook(DWORD id, DWORD event, HWND hwnd, LONG object_id,
 780                                    LONG child_id, struct hook_info *info)
 781 {
 782     struct user_thread_info *thread_info = get_user_thread_info();
 783     BOOL ret;
 784
 785     if (!HOOK_IsHooked( id ))
 786     {
 787         TRACE( "skipping hook %s mask %x\n", hook_names[id-WH_MINHOOK], thread_info->active_hooks );
 788         return FALSE;
 789     }
 790
 791     SERVER_START_REQ( start_hook_chain )
 792     {
 793         req->id = id;
 794         req->event = event;
 795         req->window = wine_server_user_handle( hwnd );
 796         req->object_id = object_id;
 797         req->child_id = child_id;
 798         wine_server_set_reply( req, info->module, sizeof(info->module)-sizeof(WCHAR) );
 799         ret = !wine_server_call( req );
 800         if (ret)
 801         {
 802             info->module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
 803             info->handle    = wine_server_ptr_handle( reply->handle );
 804             info->proc      = wine_server_get_ptr( reply->proc );
 805             info->tid       = reply->tid;
 806             thread_info->active_hooks = reply->active_hooks;
 807         }
 808     }
 809     SERVER_END_REQ;
 810     return ret && (info->tid || info->proc);
 811 }
 812
 813 static inline BOOL find_next_hook(DWORD event, HWND hwnd, LONG object_id,
 814                                   LONG child_id, struct hook_info *info)
 815 {
 816     BOOL ret;
 817
 818     SERVER_START_REQ( get_hook_info )
 819     {
 820         req->handle = wine_server_user_handle( info->handle );
 821         req->get_next = 1;
 822         req->event = event;
 823         req->window = wine_server_user_handle( hwnd );
 824         req->object_id = object_id;
 825         req->child_id = child_id;
 826         wine_server_set_reply( req, info->module, sizeof(info->module)-sizeof(WCHAR) );
 827         ret = !wine_server_call( req );
 828         if (ret)
 829         {
 830             info->module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
 831             info->handle    = wine_server_ptr_handle( reply->handle );
 832             info->proc      = wine_server_get_ptr( reply->proc );
 833             info->tid       = reply->tid;
 834         }
 835     }
 836     SERVER_END_REQ;
 837     return ret;
 838 }
 839
 840 static inline void find_hook_close(DWORD id)
 841 {
 842     SERVER_START_REQ( finish_hook_chain )
 843     {
 844         req->id = id;
 845         wine_server_call( req );
 846     }
 847     SERVER_END_REQ;
 848 }
 849
 850 /***********************************************************************
 851  *           NotifyWinEvent                             [USER32.@]
 852  *
 853  * Inform the OS that an event has occurred.
 854  *
 855  * PARAMS
 856  *  event     [I] Id of the event
 857  *  hwnd      [I] Window holding the object that created the event
 858  *  object_id [I] Type of object that created the event
 859  *  child_id  [I] Child object of nId, or CHILDID_SELF.
 860  *
 861  * RETURNS
 862  *  Nothing.
 863  */
 864 void WINAPI NotifyWinEvent(DWORD event, HWND hwnd, LONG object_id, LONG child_id)
 865 {
 866     struct hook_info info;
 867
 868     TRACE("%04x,%p,%d,%d\n", event, hwnd, object_id, child_id);
 869
 870     if (!hwnd)
 871     {
 872         SetLastError(ERROR_INVALID_WINDOW_HANDLE);
 873         return;
 874     }
 875
 876     USER_CheckNotLock();
 877
 878 #if 0
 879     if (event & 0x80000000)
 880     {
 881         /* FIXME: on 64-bit platforms we need to invent some other way for
 882          * passing parameters, nId and nChildId can't hold full [W|L]PARAM.
 883          * struct call_hook *hook = (LRESULT *)hWnd;
 884          * wparam = hook->wparam;
 885          * lparam = hook->lparam;
 886          */
 887         LRESULT *ret = (LRESULT *)hwnd;
 888         INT id, code, unicode;
 889
 890         id = (dwEvent & 0x7fff0000) >> 16;
 891         code = event & 0x7fff;
 892         unicode = event & 0x8000;
 893         *ret = HOOK_CallHooks(id, code, object_id, child_id, unicode);
 894         return;
 895     }
 896 #endif
 897
 898     if (!find_first_hook(WH_WINEVENT, event, hwnd, object_id, child_id, &info)) return;
 899
 900     do
 901     {
 902         WINEVENTPROC proc = info.proc;
 903         if (proc)
 904         {
 905             HMODULE free_module = 0;
 906             TRACE( "calling WH_WINEVENT hook %p event %x hwnd %p %x %x module %s\n",
 907                    proc, event, hwnd, object_id, child_id, debugstr_w(info.module) );
 908
 909             if (!info.module[0] || (proc = get_hook_proc( proc, info.module, &free_module )) != NULL)
 910             {
 911                 if (TRACE_ON(relay))
 912                     DPRINTF( "%04x:Call winevent hook proc %p (hhook=%p,event=%x,hwnd=%p,object_id=%x,child_id=%x,tid=%04x,time=%x)\n",
 913                              GetCurrentThreadId(), proc, info.handle, event, hwnd, object_id,
 914                              child_id, GetCurrentThreadId(), GetCurrentTime());
 915
 916                 proc( info.handle, event, hwnd, object_id, child_id,
 917                       GetCurrentThreadId(), GetCurrentTime());
 918
 919                 if (TRACE_ON(relay))
 920                     DPRINTF( "%04x:Ret  winevent hook proc %p (hhook=%p,event=%x,hwnd=%p,object_id=%x,child_id=%x,tid=%04x,time=%x)\n",
 921                              GetCurrentThreadId(), proc, info.handle, event, hwnd, object_id,
 922                              child_id, GetCurrentThreadId(), GetCurrentTime());
 923
 924                 if (free_module) FreeLibrary(free_module);
 925             }
 926         }
 927         else
 928             break;
 929     }
 930     while (find_next_hook(event, hwnd, object_id, child_id, &info));
 931
 932     find_hook_close(WH_WINEVENT);
 933 }
 934
 935
 936 /***********************************************************************
 937  *           IsWinEventHookInstalled                       [USER32.@]
 938  *
 939  * Determine if an event hook is installed for an event.
 940  *
 941  * PARAMS
 942  *  dwEvent  [I] Id of the event
 943  *
 944  * RETURNS
 945  *  TRUE,  If there are any hooks installed for the event.
 946  *  FALSE, Otherwise.
 947  *
 948  * BUGS
 949  *  Not implemented.
 950  */
 951 BOOL WINAPI IsWinEventHookInstalled(DWORD dwEvent)
 952 {
 953     /* FIXME: Needed by Office 2007 installer */
 954     WARN("(%d)-stub!\n", dwEvent);
 955     return TRUE;
 956 }