dlls/user/class.c

   1 /*
   2  * Window classes functions
   3  *
   4  * Copyright 1993, 1996, 2003 Alexandre Julliard
   5  * Copyright 1998 Juergen Schmied (jsch)
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <assert.h>
  26 #include <stdarg.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "winerror.h"
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "wingdi.h"
  34 #include "wine/winuser16.h"
  35 #include "wine/unicode.h"
  36 #include "win.h"
  37 #include "user_private.h"
  38 #include "controls.h"
  39 #include "winproc.h"
  40 #include "wine/server.h"
  41 #include "wine/list.h"
  42 #include "wine/debug.h"
  43
  44 WINE_DEFAULT_DEBUG_CHANNEL(class);
  45
  46 typedef struct tagCLASS
  47 {
  48     struct list      entry;         /* Entry in class list */
  49     UINT             style;         /* Class style */
  50     BOOL             local;         /* Local class? */
  51     WNDPROC          winprocA;      /* Window procedure (ASCII) */
  52     WNDPROC          winprocW;      /* Window procedure (Unicode) */
  53     INT              cbClsExtra;    /* Class extra bytes */
  54     INT              cbWndExtra;    /* Window extra bytes */
  55     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  56     SEGPTR           segMenuName;   /* Default menu name as SEGPTR */
  57     HINSTANCE        hInstance;     /* Module that created the task */
  58     HICON            hIcon;         /* Default icon */
  59     HICON            hIconSm;       /* Default small icon */
  60     HCURSOR          hCursor;       /* Default cursor */
  61     HBRUSH           hbrBackground; /* Default background */
  62     ATOM             atomName;      /* Name of the class */
  63 } CLASS;
  64
  65 static struct list class_list = LIST_INIT( class_list );
  66
  67 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  68
  69 /***********************************************************************
  70  *           get_class_ptr
  71  */
  72 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  73 {
  74     WND *ptr = WIN_GetPtr( hwnd );
  75
  76     if (ptr)
  77     {
  78         if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP) return ptr->class;
  79
  80         if (write_access && (ptr == WND_DESKTOP || IsWindow( hwnd ))) /* check other processes */
  81         {
  82             /* modifying classes in other processes is not allowed */
  83             SetLastError( ERROR_ACCESS_DENIED );
  84             return NULL;
  85         }
  86         return CLASS_OTHER_PROCESS;
  87     }
  88     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  89     return NULL;
  90 }
  91
  92
  93 /***********************************************************************
  94  *           release_class_ptr
  95  */
  96 inline static void release_class_ptr( CLASS *ptr )
  97 {
  98     USER_Unlock();
  99 }
 100
 101
 102 /***********************************************************************
 103  *           set_server_info
 104  *
 105  * Set class info with the wine server.
 106  */
 107 static BOOL set_server_info( HWND hwnd, INT offset, LONG newval )
 108 {
 109     BOOL ret;
 110
 111     SERVER_START_REQ( set_class_info )
 112     {
 113         req->window = hwnd;
 114         req->extra_offset = -1;
 115         switch(offset)
 116         {
 117         case GCW_ATOM:
 118             req->flags = SET_CLASS_ATOM;
 119             req->atom = newval;
 120         case GCL_STYLE:
 121             req->flags = SET_CLASS_STYLE;
 122             req->style = newval;
 123             break;
 124         case GCL_CBWNDEXTRA:
 125             req->flags = SET_CLASS_WINEXTRA;
 126             req->win_extra = newval;
 127             break;
 128         case GCLP_HMODULE:
 129             req->flags = SET_CLASS_INSTANCE;
 130             req->instance = (void *)newval;
 131             break;
 132         default:
 133             assert( offset >= 0 );
 134             req->flags = SET_CLASS_EXTRA;
 135             req->extra_offset = offset;
 136             req->extra_size = sizeof(newval);
 137             memcpy( &req->extra_value, &newval, sizeof(newval) );
 138             break;
 139         }
 140         ret = !wine_server_call_err( req );
 141     }
 142     SERVER_END_REQ;
 143     return ret;
 144 }
 145
 146
 147 /***********************************************************************
 148  *           CLASS_GetProc
 149  *
 150  * Get the class winproc for a given proc type
 151  */
 152 static WNDPROC16 CLASS_GetProc( CLASS *classPtr, WINDOWPROCTYPE type )
 153 {
 154     WNDPROC proc = classPtr->winprocA;
 155
 156     if (classPtr->winprocW)
 157     {
 158         /* if we have a Unicode proc, use it if we have no ASCII proc
 159          * or if we have both and Unicode was requested
 160          */
 161         if (!proc || type == WIN_PROC_32W) proc = classPtr->winprocW;
 162     }
 163     return WINPROC_GetProc( proc, type );
 164 }
 165
 166
 167 /***********************************************************************
 168  *           CLASS_SetProc
 169  *
 170  * Set the class winproc for a given proc type.
 171  * Returns the previous window proc.
 172  */
 173 static WNDPROC16 CLASS_SetProc( CLASS *classPtr, WNDPROC newproc, WINDOWPROCTYPE type )
 174 {
 175     WNDPROC *proc = &classPtr->winprocA;
 176     WNDPROC16 ret;
 177
 178     if (classPtr->winprocW)
 179     {
 180         /* if we have a Unicode proc, use it if we have no ASCII proc
 181          * or if we have both and Unicode was requested
 182          */
 183         if (!*proc || type == WIN_PROC_32W) proc = &classPtr->winprocW;
 184     }
 185     ret = WINPROC_GetProc( *proc, type );
 186     *proc = WINPROC_AllocProc( newproc, type );
 187     /* now clear the one that we didn't set */
 188     if (classPtr->winprocA && classPtr->winprocW)
 189     {
 190         if (proc == &classPtr->winprocA)
 191             classPtr->winprocW = 0;
 192         else
 193             classPtr->winprocA = 0;
 194     }
 195     return ret;
 196 }
 197
 198
 199 /***********************************************************************
 200  *           CLASS_GetMenuNameA
 201  *
 202  * Get the menu name as a ASCII string.
 203  */
 204 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 205 {
 206     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 207     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 208 }
 209
 210
 211 /***********************************************************************
 212  *           CLASS_GetMenuName16
 213  *
 214  * Get the menu name as a SEGPTR.
 215  */
 216 inline static SEGPTR CLASS_GetMenuName16( CLASS *classPtr )
 217 {
 218     if (!HIWORD(classPtr->menuName)) return (SEGPTR)classPtr->menuName;
 219     if (!classPtr->segMenuName)
 220         classPtr->segMenuName = MapLS( CLASS_GetMenuNameA(classPtr) );
 221     return classPtr->segMenuName;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           CLASS_GetMenuNameW
 227  *
 228  * Get the menu name as a Unicode string.
 229  */
 230 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 231 {
 232     return classPtr->menuName;
 233 }
 234
 235
 236 /***********************************************************************
 237  *           CLASS_SetMenuNameA
 238  *
 239  * Set the menu name in a class structure by copying the string.
 240  */
 241 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 242 {
 243     UnMapLS( classPtr->segMenuName );
 244     classPtr->segMenuName = 0;
 245     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 246     if (HIWORD(name))
 247     {
 248         DWORD lenA = strlen(name) + 1;
 249         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 250         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 251         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 252         memcpy( classPtr->menuName + lenW, name, lenA );
 253     }
 254     else classPtr->menuName = (LPWSTR)name;
 255 }
 256
 257
 258 /***********************************************************************
 259  *           CLASS_SetMenuNameW
 260  *
 261  * Set the menu name in a class structure by copying the string.
 262  */
 263 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 264 {
 265     UnMapLS( classPtr->segMenuName );
 266     classPtr->segMenuName = 0;
 267     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 268     if (HIWORD(name))
 269     {
 270         DWORD lenW = strlenW(name) + 1;
 271         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 272         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 273         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 274         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 275                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 276     }
 277     else classPtr->menuName = (LPWSTR)name;
 278 }
 279
 280
 281 /***********************************************************************
 282  *           CLASS_FreeClass
 283  *
 284  * Free a class structure.
 285  */
 286 static void CLASS_FreeClass( CLASS *classPtr )
 287 {
 288     TRACE("%p\n", classPtr);
 289
 290     USER_Lock();
 291
 292     list_remove( &classPtr->entry );
 293     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 294         DeleteObject( classPtr->hbrBackground );
 295     UnMapLS( classPtr->segMenuName );
 296     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 297     HeapFree( GetProcessHeap(), 0, classPtr );
 298     USER_Unlock();
 299 }
 300
 301
 302 /***********************************************************************
 303  *           CLASS_FreeModuleClasses
 304  */
 305 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 306 {
 307     struct list *ptr, *next;
 308
 309     TRACE("0x%08x\n", hModule);
 310
 311     USER_Lock();
 312     for (ptr = list_head( &class_list ); ptr; ptr = next)
 313     {
 314         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 315         next = list_next( &class_list, ptr );
 316         if (class->hInstance == HINSTANCE_32(hModule))
 317         {
 318             BOOL ret;
 319
 320             SERVER_START_REQ( destroy_class )
 321             {
 322                 req->atom = class->atomName;
 323                 req->instance = class->hInstance;
 324                 ret = !wine_server_call_err( req );
 325             }
 326             SERVER_END_REQ;
 327             if (ret) CLASS_FreeClass( class );
 328         }
 329     }
 330     USER_Unlock();
 331 }
 332
 333
 334 /***********************************************************************
 335  *           CLASS_FindClassByAtom
 336  *
 337  * Return a pointer to the class.
 338  * hinstance has been normalized by the caller.
 339  */
 340 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 341 {
 342     struct list *ptr;
 343
 344     USER_Lock();
 345
 346     LIST_FOR_EACH( ptr, &class_list )
 347     {
 348         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 349         if (class->atomName != atom) continue;
 350         if (!hinstance || !class->local || class->hInstance == hinstance)
 351         {
 352             TRACE("0x%04x %p -> %p\n", atom, hinstance, class);
 353             return class;
 354         }
 355     }
 356     USER_Unlock();
 357     TRACE("0x%04x %p -> not found\n", atom, hinstance);
 358     return NULL;
 359 }
 360
 361
 362 /***********************************************************************
 363  *           CLASS_RegisterClass
 364  *
 365  * The real RegisterClass() functionality.
 366  * The atom is deleted no matter what.
 367  */
 368 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance, BOOL local,
 369                                    DWORD style, INT classExtra, INT winExtra )
 370 {
 371     CLASS *classPtr;
 372     BOOL ret;
 373
 374     TRACE("atom=0x%x hinst=%p style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 375           atom, hInstance, style, classExtra, winExtra );
 376
 377     /* Fix the extra bytes value */
 378
 379     if (classExtra < 0 || winExtra < 0)
 380     {
 381          SetLastError( ERROR_INVALID_PARAMETER );
 382          return NULL;
 383     }
 384     if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 385         WARN("Class extra bytes %d is > 40\n", classExtra);
 386     if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 387         WARN("Win extra bytes %d is > 40\n", winExtra );
 388
 389     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 390     if (!classPtr)
 391     {
 392         GlobalDeleteAtom( atom );
 393         return NULL;
 394     }
 395
 396     SERVER_START_REQ( create_class )
 397     {
 398         req->local      = local;
 399         req->atom       = atom;
 400         req->style      = style;
 401         req->instance   = hInstance;
 402         req->extra      = classExtra;
 403         req->win_extra  = winExtra;
 404         req->client_ptr = classPtr;
 405         ret = !wine_server_call_err( req );
 406     }
 407     SERVER_END_REQ;
 408     GlobalDeleteAtom( atom );  /* the server increased the atom ref count */
 409     if (!ret)
 410     {
 411         HeapFree( GetProcessHeap(), 0, classPtr );
 412         return NULL;
 413     }
 414
 415     classPtr->style       = style;
 416     classPtr->local       = local;
 417     classPtr->cbWndExtra  = winExtra;
 418     classPtr->cbClsExtra  = classExtra;
 419     classPtr->hInstance   = hInstance;
 420     classPtr->atomName    = atom;
 421
 422     /* Other non-null values must be set by caller */
 423
 424     USER_Lock();
 425     if (local) list_add_head( &class_list, &classPtr->entry );
 426     else list_add_tail( &class_list, &classPtr->entry );
 427     return classPtr;
 428 }
 429
 430
 431 /***********************************************************************
 432  *           register_builtin
 433  *
 434  * Register a builtin control class.
 435  * This allows having both ASCII and Unicode winprocs for the same class.
 436  */
 437 static CLASS *register_builtin( const struct builtin_class_descr *descr )
 438 {
 439     ATOM atom;
 440     CLASS *classPtr;
 441
 442     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 443
 444     if (!(classPtr = CLASS_RegisterClass( atom, user32_module, FALSE,
 445                                           descr->style, 0, descr->extra ))) return 0;
 446
 447     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 448     classPtr->hbrBackground = descr->brush;
 449
 450     if (descr->procA) classPtr->winprocA = WINPROC_AllocProc( descr->procA, WIN_PROC_32A );
 451     if (descr->procW) classPtr->winprocW = WINPROC_AllocProc( descr->procW, WIN_PROC_32W );
 452     release_class_ptr( classPtr );
 453     return classPtr;
 454 }
 455
 456
 457 /***********************************************************************
 458  *           CLASS_RegisterBuiltinClasses
 459  */
 460 void CLASS_RegisterBuiltinClasses(void)
 461 {
 462     extern const struct builtin_class_descr BUTTON_builtin_class;
 463     extern const struct builtin_class_descr COMBO_builtin_class;
 464     extern const struct builtin_class_descr COMBOLBOX_builtin_class;
 465     extern const struct builtin_class_descr DIALOG_builtin_class;
 466     extern const struct builtin_class_descr DESKTOP_builtin_class;
 467     extern const struct builtin_class_descr EDIT_builtin_class;
 468     extern const struct builtin_class_descr ICONTITLE_builtin_class;
 469     extern const struct builtin_class_descr LISTBOX_builtin_class;
 470     extern const struct builtin_class_descr MDICLIENT_builtin_class;
 471     extern const struct builtin_class_descr MENU_builtin_class;
 472     extern const struct builtin_class_descr SCROLL_builtin_class;
 473     extern const struct builtin_class_descr STATIC_builtin_class;
 474
 475     register_builtin( &DESKTOP_builtin_class );
 476     register_builtin( &BUTTON_builtin_class );
 477     register_builtin( &COMBO_builtin_class );
 478     register_builtin( &COMBOLBOX_builtin_class );
 479     register_builtin( &DIALOG_builtin_class );
 480     register_builtin( &EDIT_builtin_class );
 481     register_builtin( &ICONTITLE_builtin_class );
 482     register_builtin( &LISTBOX_builtin_class );
 483     register_builtin( &MDICLIENT_builtin_class );
 484     register_builtin( &MENU_builtin_class );
 485     register_builtin( &SCROLL_builtin_class );
 486     register_builtin( &STATIC_builtin_class );
 487 }
 488
 489
 490 /***********************************************************************
 491  *           CLASS_AddWindow
 492  *
 493  * Add a new window using this class, and set the necessary
 494  * information inside the window structure.
 495  */
 496 void CLASS_AddWindow( CLASS *class, WND *win, WINDOWPROCTYPE type )
 497 {
 498     if (type == WIN_PROC_32W)
 499     {
 500         if (!(win->winproc = class->winprocW)) win->winproc = class->winprocA;
 501     }
 502     else
 503     {
 504         if (!(win->winproc = class->winprocA)) win->winproc = class->winprocW;
 505     }
 506     win->class    = class;
 507     win->clsStyle = class->style;
 508 }
 509
 510
 511 /***********************************************************************
 512  *              RegisterClassA (USER32.@)
 513  * RETURNS
 514  *      >0: Unique identifier
 515  *      0: Failure
 516  */
 517 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 518 {
 519     WNDCLASSEXA wcex;
 520
 521     wcex.cbSize        = sizeof(wcex);
 522     wcex.style         = wc->style;
 523     wcex.lpfnWndProc   = wc->lpfnWndProc;
 524     wcex.cbClsExtra    = wc->cbClsExtra;
 525     wcex.cbWndExtra    = wc->cbWndExtra;
 526     wcex.hInstance     = wc->hInstance;
 527     wcex.hIcon         = wc->hIcon;
 528     wcex.hCursor       = wc->hCursor;
 529     wcex.hbrBackground = wc->hbrBackground;
 530     wcex.lpszMenuName  = wc->lpszMenuName;
 531     wcex.lpszClassName = wc->lpszClassName;
 532     wcex.hIconSm       = 0;
 533     return RegisterClassExA( &wcex );
 534 }
 535
 536
 537 /***********************************************************************
 538  *              RegisterClassW (USER32.@)
 539  */
 540 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 541 {
 542     WNDCLASSEXW wcex;
 543
 544     wcex.cbSize        = sizeof(wcex);
 545     wcex.style         = wc->style;
 546     wcex.lpfnWndProc   = wc->lpfnWndProc;
 547     wcex.cbClsExtra    = wc->cbClsExtra;
 548     wcex.cbWndExtra    = wc->cbWndExtra;
 549     wcex.hInstance     = wc->hInstance;
 550     wcex.hIcon         = wc->hIcon;
 551     wcex.hCursor       = wc->hCursor;
 552     wcex.hbrBackground = wc->hbrBackground;
 553     wcex.lpszMenuName  = wc->lpszMenuName;
 554     wcex.lpszClassName = wc->lpszClassName;
 555     wcex.hIconSm       = 0;
 556     return RegisterClassExW( &wcex );
 557 }
 558
 559
 560 /***********************************************************************
 561  *              RegisterClassExA (USER32.@)
 562  */
 563 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 564 {
 565     ATOM atom;
 566     CLASS *classPtr;
 567     HINSTANCE instance;
 568
 569     if (wc->hInstance == user32_module)
 570     {
 571         /* we can't register a class for user32 */
 572         SetLastError( ERROR_INVALID_PARAMETER );
 573         return 0;
 574     }
 575     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 576
 577     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 578
 579     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 580                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 581         return 0;
 582
 583     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 584           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 585           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 586
 587     classPtr->hIcon         = wc->hIcon;
 588     classPtr->hIconSm       = wc->hIconSm;
 589     classPtr->hCursor       = wc->hCursor;
 590     classPtr->hbrBackground = wc->hbrBackground;
 591     classPtr->winprocA      = WINPROC_AllocProc( wc->lpfnWndProc, WIN_PROC_32A );
 592     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 593     release_class_ptr( classPtr );
 594     return atom;
 595 }
 596
 597
 598 /***********************************************************************
 599  *              RegisterClassExW (USER32.@)
 600  */
 601 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 602 {
 603     ATOM atom;
 604     CLASS *classPtr;
 605     HINSTANCE instance;
 606
 607     if (wc->hInstance == user32_module)
 608     {
 609         /* we can't register a class for user32 */
 610         SetLastError( ERROR_INVALID_PARAMETER );
 611         return 0;
 612     }
 613     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 614
 615     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 616
 617     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 618                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 619         return 0;
 620
 621     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 622           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 623           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 624
 625     classPtr->hIcon         = wc->hIcon;
 626     classPtr->hIconSm       = wc->hIconSm;
 627     classPtr->hCursor       = wc->hCursor;
 628     classPtr->hbrBackground = wc->hbrBackground;
 629     classPtr->winprocW      = WINPROC_AllocProc( wc->lpfnWndProc, WIN_PROC_32W );
 630     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 631     release_class_ptr( classPtr );
 632     return atom;
 633 }
 634
 635
 636 /***********************************************************************
 637  *              UnregisterClassA (USER32.@)
 638  */
 639 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 640 {
 641     ATOM atom = HIWORD(className) ? GlobalFindAtomA( className ) : LOWORD(className);
 642     return UnregisterClassW( MAKEINTATOMW(atom), hInstance );
 643 }
 644
 645 /***********************************************************************
 646  *              UnregisterClassW (USER32.@)
 647  */
 648 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 649 {
 650     CLASS *classPtr = NULL;
 651     ATOM atom = HIWORD(className) ? GlobalFindAtomW( className ) : LOWORD(className);
 652
 653     TRACE("%s %p %x\n",debugstr_w(className), hInstance, atom);
 654
 655     if (!atom)
 656     {
 657         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 658         return FALSE;
 659     }
 660
 661     SERVER_START_REQ( destroy_class )
 662     {
 663         req->atom = atom;
 664         req->instance = hInstance;
 665         if (!wine_server_call_err( req )) classPtr = reply->client_ptr;
 666     }
 667     SERVER_END_REQ;
 668
 669     if (classPtr) CLASS_FreeClass( classPtr );
 670     return (classPtr != NULL);
 671 }
 672
 673
 674 /***********************************************************************
 675  *              GetClassWord (USER32.@)
 676  */
 677 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 678 {
 679     CLASS *class;
 680     WORD retvalue = 0;
 681
 682     if (offset < 0) return GetClassLongA( hwnd, offset );
 683
 684     TRACE("%p %x\n",hwnd, offset);
 685
 686     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 687
 688     if (class == CLASS_OTHER_PROCESS)
 689     {
 690         SERVER_START_REQ( set_class_info )
 691         {
 692             req->window = hwnd;
 693             req->flags = 0;
 694             req->extra_offset = offset;
 695             req->extra_size = sizeof(retvalue);
 696             if (!wine_server_call_err( req ))
 697                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 698         }
 699         SERVER_END_REQ;
 700         return retvalue;
 701     }
 702
 703     if (offset <= class->cbClsExtra - sizeof(WORD))
 704         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 705     else
 706         SetLastError( ERROR_INVALID_INDEX );
 707     release_class_ptr( class );
 708     return retvalue;
 709 }
 710
 711
 712 /***********************************************************************
 713  *              GetClassLong (USER.131)
 714  */
 715 LONG WINAPI GetClassLong16( HWND16 hwnd16, INT16 offset )
 716 {
 717     CLASS *class;
 718     LONG ret;
 719     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 720
 721     TRACE("%p %d\n",hwnd, offset);
 722
 723     switch( offset )
 724     {
 725     case GCLP_WNDPROC:
 726         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 727         if (class == CLASS_OTHER_PROCESS) break;
 728         ret = (LONG)CLASS_GetProc( class, WIN_PROC_16 );
 729         release_class_ptr( class );
 730         return ret;
 731     case GCLP_MENUNAME:
 732         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 733         if (class == CLASS_OTHER_PROCESS) break;
 734         ret = (LONG)CLASS_GetMenuName16( class );
 735         release_class_ptr( class );
 736         return ret;
 737     default:
 738         return GetClassLongA( hwnd, offset );
 739     }
 740     FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 741     SetLastError( ERROR_INVALID_HANDLE );
 742     return 0;
 743 }
 744
 745
 746 /***********************************************************************
 747  *              GetClassLongW (USER32.@)
 748  */
 749 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 750 {
 751     CLASS *class;
 752     DWORD retvalue = 0;
 753
 754     TRACE("%p %d\n", hwnd, offset);
 755
 756     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 757
 758     if (class == CLASS_OTHER_PROCESS)
 759     {
 760         SERVER_START_REQ( set_class_info )
 761         {
 762             req->window = hwnd;
 763             req->flags = 0;
 764             req->extra_offset = (offset >= 0) ? offset : -1;
 765             req->extra_size = (offset >= 0) ? sizeof(retvalue) : 0;
 766             if (!wine_server_call_err( req ))
 767             {
 768                 switch(offset)
 769                 {
 770                 case GCLP_HBRBACKGROUND:
 771                 case GCLP_HCURSOR:
 772                 case GCLP_HICON:
 773                 case GCLP_HICONSM:
 774                 case GCLP_WNDPROC:
 775                 case GCLP_MENUNAME:
 776                     FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 777                     SetLastError( ERROR_INVALID_HANDLE );
 778                     break;
 779                 case GCL_STYLE:
 780                     retvalue = reply->old_style;
 781                     break;
 782                 case GCL_CBWNDEXTRA:
 783                     retvalue = reply->old_win_extra;
 784                     break;
 785                 case GCL_CBCLSEXTRA:
 786                     retvalue = reply->old_extra;
 787                     break;
 788                 case GCLP_HMODULE:
 789                     retvalue = (DWORD)reply->old_instance;
 790                     break;
 791                 case GCW_ATOM:
 792                     retvalue = reply->old_atom;
 793                     break;
 794                 default:
 795                     if (offset >= 0) memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 796                     else SetLastError( ERROR_INVALID_INDEX );
 797                     break;
 798                 }
 799             }
 800         }
 801         SERVER_END_REQ;
 802         return retvalue;
 803     }
 804
 805     if (offset >= 0)
 806     {
 807         if (offset <= class->cbClsExtra - sizeof(LONG))
 808             memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 809         else
 810             SetLastError( ERROR_INVALID_INDEX );
 811         release_class_ptr( class );
 812         return retvalue;
 813     }
 814
 815     switch(offset)
 816     {
 817     case GCLP_HBRBACKGROUND:
 818         retvalue = (DWORD)class->hbrBackground;
 819         break;
 820     case GCLP_HCURSOR:
 821         retvalue = (DWORD)class->hCursor;
 822         break;
 823     case GCLP_HICON:
 824         retvalue = (DWORD)class->hIcon;
 825         break;
 826     case GCLP_HICONSM:
 827         retvalue = (DWORD)class->hIconSm;
 828         break;
 829     case GCL_STYLE:
 830         retvalue = (DWORD)class->style;
 831         break;
 832     case GCL_CBWNDEXTRA:
 833         retvalue = (DWORD)class->cbWndExtra;
 834         break;
 835     case GCL_CBCLSEXTRA:
 836         retvalue = (DWORD)class->cbClsExtra;
 837         break;
 838     case GCLP_HMODULE:
 839         retvalue = (DWORD)class->hInstance;
 840         break;
 841     case GCLP_WNDPROC:
 842         retvalue = (DWORD)CLASS_GetProc( class, WIN_PROC_32W );
 843         break;
 844     case GCLP_MENUNAME:
 845         retvalue = (DWORD)CLASS_GetMenuNameW( class );
 846         break;
 847     case GCW_ATOM:
 848         retvalue = (DWORD)class->atomName;
 849         break;
 850     default:
 851         SetLastError( ERROR_INVALID_INDEX );
 852         break;
 853     }
 854     release_class_ptr( class );
 855     return retvalue;
 856 }
 857
 858
 859 /***********************************************************************
 860  *              GetClassLongA (USER32.@)
 861  */
 862 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 863 {
 864     CLASS *class;
 865     DWORD retvalue;
 866
 867     if (offset != GCLP_WNDPROC && offset != GCLP_MENUNAME)
 868         return GetClassLongW( hwnd, offset );
 869
 870     TRACE("%p %d\n", hwnd, offset);
 871
 872     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 873
 874     if (class == CLASS_OTHER_PROCESS)
 875     {
 876         FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 877         SetLastError( ERROR_INVALID_HANDLE );
 878         return 0;
 879     }
 880
 881     if (offset == GCLP_WNDPROC)
 882         retvalue = (DWORD)CLASS_GetProc( class, WIN_PROC_32A );
 883     else  /* GCL_MENUNAME */
 884         retvalue = (DWORD)CLASS_GetMenuNameA( class );
 885
 886     release_class_ptr( class );
 887     return retvalue;
 888 }
 889
 890
 891 /***********************************************************************
 892  *              SetClassWord (USER32.@)
 893  */
 894 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 895 {
 896     CLASS *class;
 897     WORD retval = 0;
 898
 899     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 900
 901     TRACE("%p %d %x\n", hwnd, offset, newval);
 902
 903     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 904
 905     SERVER_START_REQ( set_class_info )
 906     {
 907         req->window = hwnd;
 908         req->flags = SET_CLASS_EXTRA;
 909         req->extra_offset = offset;
 910         req->extra_size = sizeof(newval);
 911         memcpy( &req->extra_value, &newval, sizeof(newval) );
 912         if (!wine_server_call_err( req ))
 913         {
 914             void *ptr = (char *)(class + 1) + offset;
 915             memcpy( &retval, ptr, sizeof(retval) );
 916             memcpy( ptr, &newval, sizeof(newval) );
 917         }
 918     }
 919     SERVER_END_REQ;
 920     release_class_ptr( class );
 921     return retval;
 922 }
 923
 924
 925 /***********************************************************************
 926  *              SetClassLong (USER.132)
 927  */
 928 LONG WINAPI SetClassLong16( HWND16 hwnd16, INT16 offset, LONG newval )
 929 {
 930     CLASS *class;
 931     LONG retval;
 932     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 933
 934     TRACE("%p %d %lx\n", hwnd, offset, newval);
 935
 936     switch(offset)
 937     {
 938     case GCLP_WNDPROC:
 939         if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 940         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_16 );
 941         release_class_ptr( class );
 942         return retval;
 943     case GCLP_MENUNAME:
 944         newval = (LONG)MapSL( newval );
 945         /* fall through */
 946     default:
 947         return SetClassLongA( hwnd, offset, newval );
 948     }
 949 }
 950
 951
 952 /***********************************************************************
 953  *              SetClassLongW (USER32.@)
 954  */
 955 DWORD WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 956 {
 957     CLASS *class;
 958     DWORD retval = 0;
 959
 960     TRACE("%p %d %lx\n", hwnd, offset, newval);
 961
 962     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 963
 964     if (offset >= 0)
 965     {
 966         if (set_server_info( hwnd, offset, newval ))
 967         {
 968             void *ptr = (char *)(class + 1) + offset;
 969             memcpy( &retval, ptr, sizeof(retval) );
 970             memcpy( ptr, &newval, sizeof(newval) );
 971         }
 972     }
 973     else switch(offset)
 974     {
 975     case GCLP_MENUNAME:
 976         CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 977         retval = 0;  /* Old value is now meaningless anyway */
 978         break;
 979     case GCLP_WNDPROC:
 980         retval = (DWORD)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32W );
 981         break;
 982     case GCLP_HBRBACKGROUND:
 983         retval = (DWORD)class->hbrBackground;
 984         class->hbrBackground = (HBRUSH)newval;
 985         break;
 986     case GCLP_HCURSOR:
 987         retval = (DWORD)class->hCursor;
 988         class->hCursor = (HCURSOR)newval;
 989         break;
 990     case GCLP_HICON:
 991         retval = (DWORD)class->hIcon;
 992         class->hIcon = (HICON)newval;
 993         break;
 994     case GCLP_HICONSM:
 995         retval = (DWORD)class->hIconSm;
 996         class->hIconSm = (HICON)newval;
 997         break;
 998     case GCL_STYLE:
 999         if (!set_server_info( hwnd, offset, newval )) break;
1000         retval = (DWORD)class->style;
1001         class->style = newval;
1002         break;
1003     case GCL_CBWNDEXTRA:
1004         if (!set_server_info( hwnd, offset, newval )) break;
1005         retval = (DWORD)class->cbWndExtra;
1006         class->cbWndExtra = newval;
1007         break;
1008     case GCLP_HMODULE:
1009         if (!set_server_info( hwnd, offset, newval )) break;
1010         retval = (DWORD)class->hInstance;
1011         class->hInstance = (HINSTANCE)newval;
1012         break;
1013     case GCW_ATOM:
1014         if (!set_server_info( hwnd, offset, newval )) break;
1015         retval = (DWORD)class->atomName;
1016         class->atomName = newval;
1017         break;
1018     case GCL_CBCLSEXTRA:  /* cannot change this one */
1019         SetLastError( ERROR_INVALID_PARAMETER );
1020         break;
1021     default:
1022         SetLastError( ERROR_INVALID_INDEX );
1023         break;
1024     }
1025     release_class_ptr( class );
1026     return retval;
1027 }
1028
1029
1030 /***********************************************************************
1031  *              SetClassLongA (USER32.@)
1032  */
1033 DWORD WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
1034 {
1035     CLASS *class;
1036     DWORD retval;
1037
1038     if (offset != GCLP_WNDPROC && offset != GCLP_MENUNAME)
1039         return SetClassLongW( hwnd, offset, newval );
1040
1041     TRACE("%p %d %lx\n", hwnd, offset, newval);
1042
1043     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
1044
1045     if (offset == GCLP_WNDPROC)
1046         retval = (DWORD)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32A );
1047     else  /* GCL_MENUNAME */
1048     {
1049         CLASS_SetMenuNameA( class, (LPCSTR)newval );
1050         retval = 0;  /* Old value is now meaningless anyway */
1051     }
1052     release_class_ptr( class );
1053     return retval;
1054 }
1055
1056
1057 /***********************************************************************
1058  *              GetClassNameA (USER32.@)
1059  */
1060 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1061 {
1062     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
1063
1064     TRACE("%p %s %x\n",hwnd, debugstr_a(buffer), count);
1065     return ret;
1066 }
1067
1068
1069 /***********************************************************************
1070  *              GetClassNameW (USER32.@)
1071  */
1072 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1073 {
1074     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
1075
1076     TRACE("%p %s %x\n",hwnd, debugstr_w(buffer), count);
1077     return ret;
1078 }
1079
1080
1081 /***********************************************************************
1082  *              RealGetWindowClassA (USER32.@)
1083  */
1084 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
1085 {
1086     return GetClassNameA( hwnd, buffer, count );
1087 }
1088
1089
1090 /***********************************************************************
1091  *              RealGetWindowClassW (USER32.@)
1092  */
1093 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1094 {
1095     return GetClassNameW( hwnd, buffer, count );
1096 }
1097
1098
1099 /***********************************************************************
1100  *              GetClassInfoA (USER32.@)
1101  */
1102 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1103 {
1104     WNDCLASSEXA wcex;
1105     UINT ret = GetClassInfoExA( hInstance, name, &wcex );
1106
1107     if (ret)
1108     {
1109         wc->style         = wcex.style;
1110         wc->lpfnWndProc   = wcex.lpfnWndProc;
1111         wc->cbClsExtra    = wcex.cbClsExtra;
1112         wc->cbWndExtra    = wcex.cbWndExtra;
1113         wc->hInstance     = wcex.hInstance;
1114         wc->hIcon         = wcex.hIcon;
1115         wc->hCursor       = wcex.hCursor;
1116         wc->hbrBackground = wcex.hbrBackground;
1117         wc->lpszMenuName  = wcex.lpszMenuName;
1118         wc->lpszClassName = wcex.lpszClassName;
1119     }
1120     return ret;
1121 }
1122
1123
1124 /***********************************************************************
1125  *              GetClassInfoW (USER32.@)
1126  */
1127 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1128 {
1129     WNDCLASSEXW wcex;
1130     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1131
1132     if (ret)
1133     {
1134         wc->style         = wcex.style;
1135         wc->lpfnWndProc   = wcex.lpfnWndProc;
1136         wc->cbClsExtra    = wcex.cbClsExtra;
1137         wc->cbWndExtra    = wcex.cbWndExtra;
1138         wc->hInstance     = wcex.hInstance;
1139         wc->hIcon         = wcex.hIcon;
1140         wc->hCursor       = wcex.hCursor;
1141         wc->hbrBackground = wcex.hbrBackground;
1142         wc->lpszMenuName  = wcex.lpszMenuName;
1143         wc->lpszClassName = wcex.lpszClassName;
1144     }
1145     return ret;
1146 }
1147
1148
1149 /***********************************************************************
1150  *              GetClassInfoExA (USER32.@)
1151  */
1152 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1153 {
1154     ATOM atom = HIWORD(name) ? GlobalFindAtomA( name ) : LOWORD(name);
1155     CLASS *classPtr;
1156
1157     TRACE("%p %s %x %p\n", hInstance, debugstr_a(name), atom, wc);
1158
1159     if (!hInstance) hInstance = user32_module;
1160
1161     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1162     {
1163         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1164         return FALSE;
1165     }
1166     wc->style         = classPtr->style;
1167     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1168     wc->cbClsExtra    = classPtr->cbClsExtra;
1169     wc->cbWndExtra    = classPtr->cbWndExtra;
1170     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1171     wc->hIcon         = (HICON)classPtr->hIcon;
1172     wc->hIconSm       = (HICON)classPtr->hIconSm;
1173     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1174     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1175     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1176     wc->lpszClassName = name;
1177     release_class_ptr( classPtr );
1178
1179     /* We must return the atom of the class here instead of just TRUE. */
1180     return atom;
1181 }
1182
1183
1184 /***********************************************************************
1185  *              GetClassInfoExW (USER32.@)
1186  */
1187 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1188 {
1189     ATOM atom = HIWORD(name) ? GlobalFindAtomW( name ) : LOWORD(name);
1190     CLASS *classPtr;
1191
1192     TRACE("%p %s %x %p\n", hInstance, debugstr_w(name), atom, wc);
1193
1194     if (!hInstance) hInstance = user32_module;
1195
1196     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1197     {
1198         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1199         return FALSE;
1200     }
1201     wc->style         = classPtr->style;
1202     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1203     wc->cbClsExtra    = classPtr->cbClsExtra;
1204     wc->cbWndExtra    = classPtr->cbWndExtra;
1205     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1206     wc->hIcon         = (HICON)classPtr->hIcon;
1207     wc->hIconSm       = (HICON)classPtr->hIconSm;
1208     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1209     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1210     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1211     wc->lpszClassName = name;
1212     release_class_ptr( classPtr );
1213
1214     /* We must return the atom of the class here instead of just TRUE. */
1215     return atom;
1216 }
1217
1218
1219 #if 0  /* toolhelp is in kernel, so this cannot work */
1220
1221 /***********************************************************************
1222  *              ClassFirst (TOOLHELP.69)
1223  */
1224 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1225 {
1226     TRACE("%p\n",pClassEntry);
1227     pClassEntry->wNext = 1;
1228     return ClassNext16( pClassEntry );
1229 }
1230
1231
1232 /***********************************************************************
1233  *              ClassNext (TOOLHELP.70)
1234  */
1235 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1236 {
1237     int i;
1238     CLASS *class = firstClass;
1239
1240     TRACE("%p\n",pClassEntry);
1241
1242     if (!pClassEntry->wNext) return FALSE;
1243     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1244     if (!class)
1245     {
1246         pClassEntry->wNext = 0;
1247         return FALSE;
1248     }
1249     pClassEntry->hInst = class->hInstance;
1250     pClassEntry->wNext++;
1251     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1252                           sizeof(pClassEntry->szClassName) );
1253     return TRUE;
1254 }
1255 #endif