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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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          winproc;       /* Window procedure */
  52     INT              cbClsExtra;    /* Class extra bytes */
  53     INT              cbWndExtra;    /* Window extra bytes */
  54     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  55     HINSTANCE        hInstance;     /* Module that created the task */
  56     HICON            hIcon;         /* Default icon */
  57     HICON            hIconSm;       /* Default small icon */
  58     HCURSOR          hCursor;       /* Default cursor */
  59     HBRUSH           hbrBackground; /* Default background */
  60     ATOM             atomName;      /* Name of the class */
  61 } CLASS;
  62
  63 static struct list class_list = LIST_INIT( class_list );
  64
  65 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  66
  67 /***********************************************************************
  68  *           get_class_ptr
  69  */
  70 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  71 {
  72     WND *ptr = WIN_GetPtr( hwnd );
  73
  74     if (ptr)
  75     {
  76         if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP) return ptr->class;
  77         if (!write_access) return CLASS_OTHER_PROCESS;
  78
  79         /* modifying classes in other processes is not allowed */
  80         if (ptr == WND_DESKTOP || IsWindow( hwnd ))
  81         {
  82             SetLastError( ERROR_ACCESS_DENIED );
  83             return NULL;
  84         }
  85     }
  86     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  87     return NULL;
  88 }
  89
  90
  91 /***********************************************************************
  92  *           release_class_ptr
  93  */
  94 inline static void release_class_ptr( CLASS *ptr )
  95 {
  96     USER_Unlock();
  97 }
  98
  99
 100 /***********************************************************************
 101  *           set_server_info
 102  *
 103  * Set class info with the wine server.
 104  */
 105 static BOOL set_server_info( HWND hwnd, INT offset, LONG_PTR newval, UINT size )
 106 {
 107     BOOL ret;
 108
 109     SERVER_START_REQ( set_class_info )
 110     {
 111         req->window = hwnd;
 112         req->extra_offset = -1;
 113         switch(offset)
 114         {
 115         case GCW_ATOM:
 116             req->flags = SET_CLASS_ATOM;
 117             req->atom = newval;
 118         case GCL_STYLE:
 119             req->flags = SET_CLASS_STYLE;
 120             req->style = newval;
 121             break;
 122         case GCL_CBWNDEXTRA:
 123             req->flags = SET_CLASS_WINEXTRA;
 124             req->win_extra = newval;
 125             break;
 126         case GCLP_HMODULE:
 127             req->flags = SET_CLASS_INSTANCE;
 128             req->instance = (void *)newval;
 129             break;
 130         default:
 131             assert( offset >= 0 );
 132             req->flags = SET_CLASS_EXTRA;
 133             req->extra_offset = offset;
 134             req->extra_size = size;
 135             if ( size == sizeof(LONG) )
 136             {
 137                 LONG newlong = newval;
 138                 memcpy( &req->extra_value, &newlong, sizeof(LONG) );
 139             }
 140             else
 141                 memcpy( &req->extra_value, &newval, sizeof(LONG_PTR) );
 142             break;
 143         }
 144         ret = !wine_server_call_err( req );
 145     }
 146     SERVER_END_REQ;
 147     return ret;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           CLASS_GetMenuNameA
 153  *
 154  * Get the menu name as a ASCII string.
 155  */
 156 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 157 {
 158     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 159     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 160 }
 161
 162
 163 /***********************************************************************
 164  *           CLASS_GetMenuNameW
 165  *
 166  * Get the menu name as a Unicode string.
 167  */
 168 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 169 {
 170     return classPtr->menuName;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           CLASS_SetMenuNameA
 176  *
 177  * Set the menu name in a class structure by copying the string.
 178  */
 179 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 180 {
 181     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 182     if (HIWORD(name))
 183     {
 184         DWORD lenA = strlen(name) + 1;
 185         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 186         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 187         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 188         memcpy( classPtr->menuName + lenW, name, lenA );
 189     }
 190     else classPtr->menuName = (LPWSTR)name;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           CLASS_SetMenuNameW
 196  *
 197  * Set the menu name in a class structure by copying the string.
 198  */
 199 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 200 {
 201     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 202     if (HIWORD(name))
 203     {
 204         DWORD lenW = strlenW(name) + 1;
 205         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 206         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 207         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 208         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 209                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 210     }
 211     else classPtr->menuName = (LPWSTR)name;
 212 }
 213
 214
 215 /***********************************************************************
 216  *           CLASS_FreeClass
 217  *
 218  * Free a class structure.
 219  */
 220 static void CLASS_FreeClass( CLASS *classPtr )
 221 {
 222     TRACE("%p\n", classPtr);
 223
 224     USER_Lock();
 225
 226     list_remove( &classPtr->entry );
 227     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 228         DeleteObject( classPtr->hbrBackground );
 229     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 230     HeapFree( GetProcessHeap(), 0, classPtr );
 231     USER_Unlock();
 232 }
 233
 234
 235 /***********************************************************************
 236  *           CLASS_FreeModuleClasses
 237  */
 238 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 239 {
 240     struct list *ptr, *next;
 241
 242     TRACE("0x%08x\n", hModule);
 243
 244     USER_Lock();
 245     for (ptr = list_head( &class_list ); ptr; ptr = next)
 246     {
 247         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 248         next = list_next( &class_list, ptr );
 249         if (class->hInstance == HINSTANCE_32(hModule))
 250         {
 251             BOOL ret;
 252
 253             SERVER_START_REQ( destroy_class )
 254             {
 255                 req->atom = class->atomName;
 256                 req->instance = class->hInstance;
 257                 ret = !wine_server_call_err( req );
 258             }
 259             SERVER_END_REQ;
 260             if (ret) CLASS_FreeClass( class );
 261         }
 262     }
 263     USER_Unlock();
 264 }
 265
 266
 267 /***********************************************************************
 268  *           CLASS_FindClassByAtom
 269  *
 270  * Return a pointer to the class.
 271  * hinstance has been normalized by the caller.
 272  */
 273 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 274 {
 275     struct list *ptr;
 276
 277     USER_Lock();
 278
 279     LIST_FOR_EACH( ptr, &class_list )
 280     {
 281         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 282         if (class->atomName != atom) continue;
 283         if (!hinstance || !class->local || class->hInstance == hinstance)
 284         {
 285             TRACE("0x%04x %p -> %p\n", atom, hinstance, class);
 286             return class;
 287         }
 288     }
 289     USER_Unlock();
 290     TRACE("0x%04x %p -> not found\n", atom, hinstance);
 291     return NULL;
 292 }
 293
 294
 295 /***********************************************************************
 296  *           CLASS_RegisterClass
 297  *
 298  * The real RegisterClass() functionality.
 299  * The atom is deleted no matter what.
 300  */
 301 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance, BOOL local,
 302                                    DWORD style, INT classExtra, INT winExtra )
 303 {
 304     CLASS *classPtr;
 305     BOOL ret;
 306
 307     TRACE("atom=0x%x hinst=%p style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 308           atom, hInstance, style, classExtra, winExtra );
 309
 310     /* Fix the extra bytes value */
 311
 312     if (classExtra < 0 || winExtra < 0)
 313     {
 314          SetLastError( ERROR_INVALID_PARAMETER );
 315          return NULL;
 316     }
 317     if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 318         WARN("Class extra bytes %d is > 40\n", classExtra);
 319     if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 320         WARN("Win extra bytes %d is > 40\n", winExtra );
 321
 322     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 323     if (!classPtr)
 324     {
 325         GlobalDeleteAtom( atom );
 326         return NULL;
 327     }
 328
 329     SERVER_START_REQ( create_class )
 330     {
 331         req->local      = local;
 332         req->atom       = atom;
 333         req->style      = style;
 334         req->instance   = hInstance;
 335         req->extra      = classExtra;
 336         req->win_extra  = winExtra;
 337         req->client_ptr = classPtr;
 338         ret = !wine_server_call_err( req );
 339     }
 340     SERVER_END_REQ;
 341     GlobalDeleteAtom( atom );  /* the server increased the atom ref count */
 342     if (!ret)
 343     {
 344         HeapFree( GetProcessHeap(), 0, classPtr );
 345         return NULL;
 346     }
 347
 348     classPtr->style       = style;
 349     classPtr->local       = local;
 350     classPtr->cbWndExtra  = winExtra;
 351     classPtr->cbClsExtra  = classExtra;
 352     classPtr->hInstance   = hInstance;
 353     classPtr->atomName    = atom;
 354
 355     /* Other non-null values must be set by caller */
 356
 357     USER_Lock();
 358     if (local) list_add_head( &class_list, &classPtr->entry );
 359     else list_add_tail( &class_list, &classPtr->entry );
 360     return classPtr;
 361 }
 362
 363
 364 /***********************************************************************
 365  *           register_builtin
 366  *
 367  * Register a builtin control class.
 368  * This allows having both ASCII and Unicode winprocs for the same class.
 369  */
 370 static CLASS *register_builtin( const struct builtin_class_descr *descr )
 371 {
 372     ATOM atom;
 373     CLASS *classPtr;
 374
 375     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 376
 377     if (!(classPtr = CLASS_RegisterClass( atom, user32_module, FALSE,
 378                                           descr->style, 0, descr->extra ))) return 0;
 379
 380     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 381     classPtr->hbrBackground = descr->brush;
 382     classPtr->winproc       = WINPROC_AllocProc( descr->procA, descr->procW );
 383     release_class_ptr( classPtr );
 384     return classPtr;
 385 }
 386
 387
 388 /***********************************************************************
 389  *           CLASS_RegisterBuiltinClasses
 390  */
 391 void CLASS_RegisterBuiltinClasses(void)
 392 {
 393     extern const struct builtin_class_descr BUTTON_builtin_class;
 394     extern const struct builtin_class_descr COMBO_builtin_class;
 395     extern const struct builtin_class_descr COMBOLBOX_builtin_class;
 396     extern const struct builtin_class_descr DIALOG_builtin_class;
 397     extern const struct builtin_class_descr DESKTOP_builtin_class;
 398     extern const struct builtin_class_descr EDIT_builtin_class;
 399     extern const struct builtin_class_descr ICONTITLE_builtin_class;
 400     extern const struct builtin_class_descr LISTBOX_builtin_class;
 401     extern const struct builtin_class_descr MDICLIENT_builtin_class;
 402     extern const struct builtin_class_descr MENU_builtin_class;
 403     extern const struct builtin_class_descr SCROLL_builtin_class;
 404     extern const struct builtin_class_descr STATIC_builtin_class;
 405
 406     register_builtin( &DESKTOP_builtin_class );
 407     register_builtin( &BUTTON_builtin_class );
 408     register_builtin( &COMBO_builtin_class );
 409     register_builtin( &COMBOLBOX_builtin_class );
 410     register_builtin( &DIALOG_builtin_class );
 411     register_builtin( &EDIT_builtin_class );
 412     register_builtin( &ICONTITLE_builtin_class );
 413     register_builtin( &LISTBOX_builtin_class );
 414     register_builtin( &MDICLIENT_builtin_class );
 415     register_builtin( &MENU_builtin_class );
 416     register_builtin( &SCROLL_builtin_class );
 417     register_builtin( &STATIC_builtin_class );
 418 }
 419
 420
 421 /***********************************************************************
 422  *           CLASS_AddWindow
 423  *
 424  * Add a new window using this class, and set the necessary
 425  * information inside the window structure.
 426  */
 427 void CLASS_AddWindow( CLASS *class, WND *win, BOOL unicode )
 428 {
 429     win->class    = class;
 430     win->clsStyle = class->style;
 431     win->winproc  = class->winproc;
 432     if (WINPROC_IsUnicode( win->winproc, unicode )) win->flags |= WIN_ISUNICODE;
 433 }
 434
 435
 436 /***********************************************************************
 437  *              RegisterClassA (USER32.@)
 438  *
 439  * Register a window class.
 440  *
 441  * RETURNS
 442  *      >0: Unique identifier
 443  *      0: Failure
 444  */
 445 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 446 {
 447     WNDCLASSEXA wcex;
 448
 449     wcex.cbSize        = sizeof(wcex);
 450     wcex.style         = wc->style;
 451     wcex.lpfnWndProc   = wc->lpfnWndProc;
 452     wcex.cbClsExtra    = wc->cbClsExtra;
 453     wcex.cbWndExtra    = wc->cbWndExtra;
 454     wcex.hInstance     = wc->hInstance;
 455     wcex.hIcon         = wc->hIcon;
 456     wcex.hCursor       = wc->hCursor;
 457     wcex.hbrBackground = wc->hbrBackground;
 458     wcex.lpszMenuName  = wc->lpszMenuName;
 459     wcex.lpszClassName = wc->lpszClassName;
 460     wcex.hIconSm       = 0;
 461     return RegisterClassExA( &wcex );
 462 }
 463
 464
 465 /***********************************************************************
 466  *              RegisterClassW (USER32.@)
 467  *
 468  * See RegisterClassA.
 469  */
 470 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 471 {
 472     WNDCLASSEXW wcex;
 473
 474     wcex.cbSize        = sizeof(wcex);
 475     wcex.style         = wc->style;
 476     wcex.lpfnWndProc   = wc->lpfnWndProc;
 477     wcex.cbClsExtra    = wc->cbClsExtra;
 478     wcex.cbWndExtra    = wc->cbWndExtra;
 479     wcex.hInstance     = wc->hInstance;
 480     wcex.hIcon         = wc->hIcon;
 481     wcex.hCursor       = wc->hCursor;
 482     wcex.hbrBackground = wc->hbrBackground;
 483     wcex.lpszMenuName  = wc->lpszMenuName;
 484     wcex.lpszClassName = wc->lpszClassName;
 485     wcex.hIconSm       = 0;
 486     return RegisterClassExW( &wcex );
 487 }
 488
 489
 490 /***********************************************************************
 491  *              RegisterClassExA (USER32.@)
 492  */
 493 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 494 {
 495     ATOM atom;
 496     CLASS *classPtr;
 497     HINSTANCE instance;
 498
 499     if (wc->hInstance == user32_module)
 500     {
 501         /* we can't register a class for user32 */
 502         SetLastError( ERROR_INVALID_PARAMETER );
 503         return 0;
 504     }
 505     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 506
 507     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 508
 509     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 510                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 511         return 0;
 512
 513     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 514           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 515           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 516
 517     classPtr->hIcon         = wc->hIcon;
 518     classPtr->hIconSm       = wc->hIconSm;
 519     classPtr->hCursor       = wc->hCursor;
 520     classPtr->hbrBackground = wc->hbrBackground;
 521     classPtr->winproc       = WINPROC_AllocProc( wc->lpfnWndProc, NULL );
 522     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 523     release_class_ptr( classPtr );
 524     return atom;
 525 }
 526
 527
 528 /***********************************************************************
 529  *              RegisterClassExW (USER32.@)
 530  */
 531 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 532 {
 533     ATOM atom;
 534     CLASS *classPtr;
 535     HINSTANCE instance;
 536
 537     if (wc->hInstance == user32_module)
 538     {
 539         /* we can't register a class for user32 */
 540         SetLastError( ERROR_INVALID_PARAMETER );
 541         return 0;
 542     }
 543     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 544
 545     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 546
 547     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 548                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 549         return 0;
 550
 551     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 552           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 553           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 554
 555     classPtr->hIcon         = wc->hIcon;
 556     classPtr->hIconSm       = wc->hIconSm;
 557     classPtr->hCursor       = wc->hCursor;
 558     classPtr->hbrBackground = wc->hbrBackground;
 559     classPtr->winproc       = WINPROC_AllocProc( NULL, wc->lpfnWndProc );
 560     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 561     release_class_ptr( classPtr );
 562     return atom;
 563 }
 564
 565
 566 /***********************************************************************
 567  *              UnregisterClassA (USER32.@)
 568  */
 569 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 570 {
 571     ATOM atom = HIWORD(className) ? GlobalFindAtomA( className ) : LOWORD(className);
 572     return UnregisterClassW( MAKEINTATOMW(atom), hInstance );
 573 }
 574
 575 /***********************************************************************
 576  *              UnregisterClassW (USER32.@)
 577  */
 578 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 579 {
 580     CLASS *classPtr = NULL;
 581     ATOM atom = HIWORD(className) ? GlobalFindAtomW( className ) : LOWORD(className);
 582
 583     TRACE("%s %p %x\n",debugstr_w(className), hInstance, atom);
 584
 585     if (!atom)
 586     {
 587         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 588         return FALSE;
 589     }
 590
 591     SERVER_START_REQ( destroy_class )
 592     {
 593         req->atom = atom;
 594         req->instance = hInstance;
 595         if (!wine_server_call_err( req )) classPtr = reply->client_ptr;
 596     }
 597     SERVER_END_REQ;
 598
 599     if (classPtr) CLASS_FreeClass( classPtr );
 600     return (classPtr != NULL);
 601 }
 602
 603
 604 /***********************************************************************
 605  *              GetClassWord (USER32.@)
 606  */
 607 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 608 {
 609     CLASS *class;
 610     WORD retvalue = 0;
 611
 612     if (offset < 0) return GetClassLongA( hwnd, offset );
 613
 614     TRACE("%p %x\n",hwnd, offset);
 615
 616     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 617
 618     if (class == CLASS_OTHER_PROCESS)
 619     {
 620         SERVER_START_REQ( set_class_info )
 621         {
 622             req->window = hwnd;
 623             req->flags = 0;
 624             req->extra_offset = offset;
 625             req->extra_size = sizeof(retvalue);
 626             if (!wine_server_call_err( req ))
 627                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 628         }
 629         SERVER_END_REQ;
 630         return retvalue;
 631     }
 632
 633     if (offset <= class->cbClsExtra - sizeof(WORD))
 634         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 635     else
 636         SetLastError( ERROR_INVALID_INDEX );
 637     release_class_ptr( class );
 638     return retvalue;
 639 }
 640
 641
 642 /***********************************************************************
 643  *             CLASS_GetClassLong
 644  *
 645  * Implementation of GetClassLong(Ptr)A/W
 646  */
 647 static ULONG_PTR CLASS_GetClassLong( HWND hwnd, INT offset, UINT size,
 648                                      BOOL unicode )
 649 {
 650     CLASS *class;
 651     ULONG_PTR retvalue = 0;
 652
 653     TRACE("%p %d\n", hwnd, offset);
 654
 655     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 656
 657     if (class == CLASS_OTHER_PROCESS)
 658     {
 659         SERVER_START_REQ( set_class_info )
 660         {
 661             req->window = hwnd;
 662             req->flags = 0;
 663             req->extra_offset = (offset >= 0) ? offset : -1;
 664             req->extra_size = (offset >= 0) ? size : 0;
 665             if (!wine_server_call_err( req ))
 666             {
 667                 switch(offset)
 668                 {
 669                 case GCLP_HBRBACKGROUND:
 670                 case GCLP_HCURSOR:
 671                 case GCLP_HICON:
 672                 case GCLP_HICONSM:
 673                 case GCLP_WNDPROC:
 674                 case GCLP_MENUNAME:
 675                     FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 676                     SetLastError( ERROR_INVALID_HANDLE );
 677                     break;
 678                 case GCL_STYLE:
 679                     retvalue = reply->old_style;
 680                     break;
 681                 case GCL_CBWNDEXTRA:
 682                     retvalue = reply->old_win_extra;
 683                     break;
 684                 case GCL_CBCLSEXTRA:
 685                     retvalue = reply->old_extra;
 686                     break;
 687                 case GCLP_HMODULE:
 688                     retvalue = (ULONG_PTR)reply->old_instance;
 689                     break;
 690                 case GCW_ATOM:
 691                     retvalue = reply->old_atom;
 692                     break;
 693                 default:
 694                     if (offset >= 0)
 695                     {
 696                         if (size == sizeof(DWORD))
 697                         {
 698                             DWORD retdword;
 699                             memcpy( &retdword, &reply->old_extra_value, sizeof(DWORD) );
 700                             retvalue = retdword;
 701                         }
 702                         else
 703                             memcpy( &retvalue, &reply->old_extra_value,
 704                                     sizeof(ULONG_PTR) );
 705                     }
 706                     else SetLastError( ERROR_INVALID_INDEX );
 707                     break;
 708                 }
 709             }
 710         }
 711         SERVER_END_REQ;
 712         return retvalue;
 713     }
 714
 715     if (offset >= 0)
 716     {
 717         if (offset <= class->cbClsExtra - size)
 718         {
 719             if (size == sizeof(DWORD))
 720             {
 721                 DWORD retdword;
 722                 memcpy( &retdword, (char *)(class + 1) + offset, sizeof(DWORD) );
 723                 retvalue = retdword;
 724             }
 725             else
 726                 memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(ULONG_PTR) );
 727         }
 728         else
 729             SetLastError( ERROR_INVALID_INDEX );
 730         release_class_ptr( class );
 731         return retvalue;
 732     }
 733
 734     switch(offset)
 735     {
 736     case GCLP_HBRBACKGROUND:
 737         retvalue = (ULONG_PTR)class->hbrBackground;
 738         break;
 739     case GCLP_HCURSOR:
 740         retvalue = (ULONG_PTR)class->hCursor;
 741         break;
 742     case GCLP_HICON:
 743         retvalue = (ULONG_PTR)class->hIcon;
 744         break;
 745     case GCLP_HICONSM:
 746         retvalue = (ULONG_PTR)class->hIconSm;
 747         break;
 748     case GCL_STYLE:
 749         retvalue = class->style;
 750         break;
 751     case GCL_CBWNDEXTRA:
 752         retvalue = class->cbWndExtra;
 753         break;
 754     case GCL_CBCLSEXTRA:
 755         retvalue = class->cbClsExtra;
 756         break;
 757     case GCLP_HMODULE:
 758         retvalue = (ULONG_PTR)class->hInstance;
 759         break;
 760     case GCLP_WNDPROC:
 761         retvalue = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 762         break;
 763     case GCLP_MENUNAME:
 764         retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 765         if (unicode)
 766             retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 767         else
 768             retvalue = (ULONG_PTR)CLASS_GetMenuNameA( class );
 769         break;
 770     case GCW_ATOM:
 771         retvalue = class->atomName;
 772         break;
 773     default:
 774         SetLastError( ERROR_INVALID_INDEX );
 775         break;
 776     }
 777     release_class_ptr( class );
 778     return retvalue;
 779 }
 780
 781
 782 /***********************************************************************
 783  *              GetClassLongW (USER32.@)
 784  */
 785 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 786 {
 787     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), TRUE );
 788 }
 789
 790
 791
 792 /***********************************************************************
 793  *              GetClassLongA (USER32.@)
 794  */
 795 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 796 {
 797     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), FALSE );
 798 }
 799
 800
 801 /***********************************************************************
 802  *              SetClassWord (USER32.@)
 803  */
 804 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 805 {
 806     CLASS *class;
 807     WORD retval = 0;
 808
 809     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 810
 811     TRACE("%p %d %x\n", hwnd, offset, newval);
 812
 813     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 814
 815     SERVER_START_REQ( set_class_info )
 816     {
 817         req->window = hwnd;
 818         req->flags = SET_CLASS_EXTRA;
 819         req->extra_offset = offset;
 820         req->extra_size = sizeof(newval);
 821         memcpy( &req->extra_value, &newval, sizeof(newval) );
 822         if (!wine_server_call_err( req ))
 823         {
 824             void *ptr = (char *)(class + 1) + offset;
 825             memcpy( &retval, ptr, sizeof(retval) );
 826             memcpy( ptr, &newval, sizeof(newval) );
 827         }
 828     }
 829     SERVER_END_REQ;
 830     release_class_ptr( class );
 831     return retval;
 832 }
 833
 834
 835 /***********************************************************************
 836  *             CLASS_SetClassLong
 837  *
 838  * Implementation of SetClassLong(Ptr)A/W
 839  */
 840 static ULONG_PTR CLASS_SetClassLong( HWND hwnd, INT offset, LONG_PTR newval,
 841                                      UINT size, BOOL unicode )
 842 {
 843     CLASS *class;
 844     ULONG_PTR retval = 0;
 845
 846     TRACE("%p %d %lx\n", hwnd, offset, newval);
 847
 848     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 849
 850     if (offset >= 0)
 851     {
 852         if (set_server_info( hwnd, offset, newval, size ))
 853         {
 854             void *ptr = (char *)(class + 1) + offset;
 855             if ( size == sizeof(LONG) )
 856             {
 857                 DWORD retdword;
 858                 LONG newlong = newval;
 859                 memcpy( &retdword, ptr, sizeof(DWORD) );
 860                 memcpy( ptr, &newlong, sizeof(LONG) );
 861                 retval = retdword;
 862             }
 863             else
 864             {
 865                 memcpy( &retval, ptr, sizeof(ULONG_PTR) );
 866                 memcpy( ptr, &newval, sizeof(LONG_PTR) );
 867             }
 868         }
 869     }
 870     else switch(offset)
 871     {
 872     case GCLP_MENUNAME:
 873         if ( unicode )
 874             CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 875         else
 876             CLASS_SetMenuNameA( class, (LPCSTR)newval );
 877         retval = 0;  /* Old value is now meaningless anyway */
 878         break;
 879     case GCLP_WNDPROC:
 880         retval = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 881         class->winproc = WINPROC_AllocProc( unicode ? NULL : (WNDPROC)newval,
 882                                             unicode ? (WNDPROC)newval : NULL );
 883         break;
 884     case GCLP_HBRBACKGROUND:
 885         retval = (ULONG_PTR)class->hbrBackground;
 886         class->hbrBackground = (HBRUSH)newval;
 887         break;
 888     case GCLP_HCURSOR:
 889         retval = (ULONG_PTR)class->hCursor;
 890         class->hCursor = (HCURSOR)newval;
 891         break;
 892     case GCLP_HICON:
 893         retval = (ULONG_PTR)class->hIcon;
 894         class->hIcon = (HICON)newval;
 895         break;
 896     case GCLP_HICONSM:
 897         retval = (ULONG_PTR)class->hIconSm;
 898         class->hIconSm = (HICON)newval;
 899         break;
 900     case GCL_STYLE:
 901         if (!set_server_info( hwnd, offset, newval, size )) break;
 902         retval = class->style;
 903         class->style = newval;
 904         break;
 905     case GCL_CBWNDEXTRA:
 906         if (!set_server_info( hwnd, offset, newval, size )) break;
 907         retval = class->cbWndExtra;
 908         class->cbWndExtra = newval;
 909         break;
 910     case GCLP_HMODULE:
 911         if (!set_server_info( hwnd, offset, newval, size )) break;
 912         retval = (ULONG_PTR)class->hInstance;
 913         class->hInstance = (HINSTANCE)newval;
 914         break;
 915     case GCW_ATOM:
 916         if (!set_server_info( hwnd, offset, newval, size )) break;
 917         retval = class->atomName;
 918         class->atomName = newval;
 919         break;
 920     case GCL_CBCLSEXTRA:  /* cannot change this one */
 921         SetLastError( ERROR_INVALID_PARAMETER );
 922         break;
 923     default:
 924         SetLastError( ERROR_INVALID_INDEX );
 925         break;
 926     }
 927     release_class_ptr( class );
 928     return retval;
 929 }
 930
 931
 932 /***********************************************************************
 933  *              SetClassLongW (USER32.@)
 934  */
 935 DWORD WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 936 {
 937     TRACE("%p %d %lx\n", hwnd, offset, newval);
 938
 939     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), TRUE );
 940 }
 941
 942
 943 /***********************************************************************
 944  *              SetClassLongA (USER32.@)
 945  */
 946 DWORD WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 947 {
 948     TRACE("%p %d %lx\n", hwnd, offset, newval);
 949
 950     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), FALSE );
 951 }
 952
 953
 954 /***********************************************************************
 955  *              GetClassNameA (USER32.@)
 956  */
 957 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
 958 {
 959     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
 960
 961     TRACE("%p %s %x\n",hwnd, debugstr_a(buffer), count);
 962     return ret;
 963 }
 964
 965
 966 /***********************************************************************
 967  *              GetClassNameW (USER32.@)
 968  */
 969 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
 970 {
 971     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
 972
 973     TRACE("%p %s %x\n",hwnd, debugstr_w(buffer), count);
 974     return ret;
 975 }
 976
 977
 978 /***********************************************************************
 979  *              RealGetWindowClassA (USER32.@)
 980  */
 981 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
 982 {
 983     return GetClassNameA( hwnd, buffer, count );
 984 }
 985
 986
 987 /***********************************************************************
 988  *              RealGetWindowClassW (USER32.@)
 989  */
 990 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
 991 {
 992     return GetClassNameW( hwnd, buffer, count );
 993 }
 994
 995
 996 /***********************************************************************
 997  *              GetClassInfoA (USER32.@)
 998  */
 999 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1000 {
1001     WNDCLASSEXA wcex;
1002     UINT ret = GetClassInfoExA( hInstance, name, &wcex );
1003
1004     if (ret)
1005     {
1006         wc->style         = wcex.style;
1007         wc->lpfnWndProc   = wcex.lpfnWndProc;
1008         wc->cbClsExtra    = wcex.cbClsExtra;
1009         wc->cbWndExtra    = wcex.cbWndExtra;
1010         wc->hInstance     = wcex.hInstance;
1011         wc->hIcon         = wcex.hIcon;
1012         wc->hCursor       = wcex.hCursor;
1013         wc->hbrBackground = wcex.hbrBackground;
1014         wc->lpszMenuName  = wcex.lpszMenuName;
1015         wc->lpszClassName = wcex.lpszClassName;
1016     }
1017     return ret;
1018 }
1019
1020
1021 /***********************************************************************
1022  *              GetClassInfoW (USER32.@)
1023  */
1024 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1025 {
1026     WNDCLASSEXW wcex;
1027     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1028
1029     if (ret)
1030     {
1031         wc->style         = wcex.style;
1032         wc->lpfnWndProc   = wcex.lpfnWndProc;
1033         wc->cbClsExtra    = wcex.cbClsExtra;
1034         wc->cbWndExtra    = wcex.cbWndExtra;
1035         wc->hInstance     = wcex.hInstance;
1036         wc->hIcon         = wcex.hIcon;
1037         wc->hCursor       = wcex.hCursor;
1038         wc->hbrBackground = wcex.hbrBackground;
1039         wc->lpszMenuName  = wcex.lpszMenuName;
1040         wc->lpszClassName = wcex.lpszClassName;
1041     }
1042     return ret;
1043 }
1044
1045
1046 /***********************************************************************
1047  *              GetClassInfoExA (USER32.@)
1048  */
1049 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1050 {
1051     ATOM atom = HIWORD(name) ? GlobalFindAtomA( name ) : LOWORD(name);
1052     CLASS *classPtr;
1053
1054     TRACE("%p %s %x %p\n", hInstance, debugstr_a(name), atom, wc);
1055
1056     if (!hInstance) hInstance = user32_module;
1057
1058     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1059     {
1060         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1061         return FALSE;
1062     }
1063     wc->style         = classPtr->style;
1064     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, FALSE );
1065     wc->cbClsExtra    = classPtr->cbClsExtra;
1066     wc->cbWndExtra    = classPtr->cbWndExtra;
1067     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1068     wc->hIcon         = (HICON)classPtr->hIcon;
1069     wc->hIconSm       = (HICON)classPtr->hIconSm;
1070     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1071     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1072     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1073     wc->lpszClassName = name;
1074     release_class_ptr( classPtr );
1075
1076     /* We must return the atom of the class here instead of just TRUE. */
1077     return atom;
1078 }
1079
1080
1081 /***********************************************************************
1082  *              GetClassInfoExW (USER32.@)
1083  */
1084 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1085 {
1086     ATOM atom = HIWORD(name) ? GlobalFindAtomW( name ) : LOWORD(name);
1087     CLASS *classPtr;
1088
1089     TRACE("%p %s %x %p\n", hInstance, debugstr_w(name), atom, wc);
1090
1091     if (!hInstance) hInstance = user32_module;
1092
1093     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1094     {
1095         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1096         return FALSE;
1097     }
1098     wc->style         = classPtr->style;
1099     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, TRUE );
1100     wc->cbClsExtra    = classPtr->cbClsExtra;
1101     wc->cbWndExtra    = classPtr->cbWndExtra;
1102     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1103     wc->hIcon         = (HICON)classPtr->hIcon;
1104     wc->hIconSm       = (HICON)classPtr->hIconSm;
1105     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1106     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1107     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1108     wc->lpszClassName = name;
1109     release_class_ptr( classPtr );
1110
1111     /* We must return the atom of the class here instead of just TRUE. */
1112     return atom;
1113 }
1114
1115
1116 #if 0  /* toolhelp is in kernel, so this cannot work */
1117
1118 /***********************************************************************
1119  *              ClassFirst (TOOLHELP.69)
1120  */
1121 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1122 {
1123     TRACE("%p\n",pClassEntry);
1124     pClassEntry->wNext = 1;
1125     return ClassNext16( pClassEntry );
1126 }
1127
1128
1129 /***********************************************************************
1130  *              ClassNext (TOOLHELP.70)
1131  */
1132 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1133 {
1134     int i;
1135     CLASS *class = firstClass;
1136
1137     TRACE("%p\n",pClassEntry);
1138
1139     if (!pClassEntry->wNext) return FALSE;
1140     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1141     if (!class)
1142     {
1143         pClassEntry->wNext = 0;
1144         return FALSE;
1145     }
1146     pClassEntry->hInst = class->hInstance;
1147     pClassEntry->wNext++;
1148     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1149                           sizeof(pClassEntry->szClassName) );
1150     return TRUE;
1151 }
1152 #endif
1153
1154 /* 64bit versions */
1155
1156 #ifdef GetClassLongPtrA
1157 #undef GetClassLongPtrA
1158 #endif
1159
1160 #ifdef GetClassLongPtrW
1161 #undef GetClassLongPtrW
1162 #endif
1163
1164 #ifdef SetClassLongPtrA
1165 #undef SetClassLongPtrA
1166 #endif
1167
1168 #ifdef SetClassLongPtrW
1169 #undef SetClassLongPtrW
1170 #endif
1171
1172 /***********************************************************************
1173  *              GetClassLongPtrA (USER32.@)
1174  */
1175 ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
1176 {
1177     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), FALSE );
1178 }
1179
1180 /***********************************************************************
1181  *              GetClassLongPtrW (USER32.@)
1182  */
1183 ULONG_PTR WINAPI GetClassLongPtrW( HWND hwnd, INT offset )
1184 {
1185     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), TRUE );
1186 }
1187
1188 /***********************************************************************
1189  *              SetClassLongPtrW (USER32.@)
1190  */
1191 ULONG_PTR WINAPI SetClassLongPtrW( HWND hwnd, INT offset, LONG_PTR newval )
1192 {
1193     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), TRUE );
1194 }
1195
1196 /***********************************************************************
1197  *              SetClassLongPtrA (USER32.@)
1198  */
1199 ULONG_PTR WINAPI SetClassLongPtrA( HWND hwnd, INT offset, LONG_PTR newval )
1200 {
1201     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), FALSE );
1202 }