dlls/user32/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/unicode.h"
  35 #include "win.h"
  36 #include "user_private.h"
  37 #include "controls.h"
  38 #include "wine/server.h"
  39 #include "wine/list.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(class);
  43
  44 typedef struct tagCLASS
  45 {
  46     struct list      entry;         /* Entry in class list */
  47     UINT             style;         /* Class style */
  48     BOOL             local;         /* Local class? */
  49     WNDPROC          winproc;       /* Window procedure */
  50     INT              cbClsExtra;    /* Class extra bytes */
  51     INT              cbWndExtra;    /* Window extra bytes */
  52     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  53     HINSTANCE        hInstance;     /* Module that created the task */
  54     HICON            hIcon;         /* Default icon */
  55     HICON            hIconSm;       /* Default small icon */
  56     HCURSOR          hCursor;       /* Default cursor */
  57     HBRUSH           hbrBackground; /* Default background */
  58     ATOM             atomName;      /* Name of the class */
  59 } CLASS;
  60
  61 static struct list class_list = LIST_INIT( class_list );
  62
  63 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  64 #define MAX_ATOM_LEN 255 /* from dlls/kernel32/atom.c */
  65
  66 /***********************************************************************
  67  *           get_class_ptr
  68  */
  69 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  70 {
  71     WND *ptr = WIN_GetPtr( hwnd );
  72
  73     if (ptr)
  74     {
  75         if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP) return ptr->class;
  76         if (!write_access) return CLASS_OTHER_PROCESS;
  77
  78         /* modifying classes in other processes is not allowed */
  79         if (ptr == WND_DESKTOP || IsWindow( hwnd ))
  80         {
  81             SetLastError( ERROR_ACCESS_DENIED );
  82             return NULL;
  83         }
  84     }
  85     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  86     return NULL;
  87 }
  88
  89
  90 /***********************************************************************
  91  *           release_class_ptr
  92  */
  93 static inline void release_class_ptr( CLASS *ptr )
  94 {
  95     USER_Unlock();
  96 }
  97
  98
  99 /***********************************************************************
 100  *           set_server_info
 101  *
 102  * Set class info with the wine server.
 103  */
 104 static BOOL set_server_info( HWND hwnd, INT offset, LONG_PTR newval, UINT size )
 105 {
 106     BOOL ret;
 107
 108     SERVER_START_REQ( set_class_info )
 109     {
 110         req->window = hwnd;
 111         req->extra_offset = -1;
 112         switch(offset)
 113         {
 114         case GCW_ATOM:
 115             req->flags = SET_CLASS_ATOM;
 116             req->atom = newval;
 117         case GCL_STYLE:
 118             req->flags = SET_CLASS_STYLE;
 119             req->style = newval;
 120             break;
 121         case GCL_CBWNDEXTRA:
 122             req->flags = SET_CLASS_WINEXTRA;
 123             req->win_extra = newval;
 124             break;
 125         case GCLP_HMODULE:
 126             req->flags = SET_CLASS_INSTANCE;
 127             req->instance = (void *)newval;
 128             break;
 129         default:
 130             assert( offset >= 0 );
 131             req->flags = SET_CLASS_EXTRA;
 132             req->extra_offset = offset;
 133             req->extra_size = size;
 134             if ( size == sizeof(LONG) )
 135             {
 136                 LONG newlong = newval;
 137                 memcpy( &req->extra_value, &newlong, sizeof(LONG) );
 138             }
 139             else
 140                 memcpy( &req->extra_value, &newval, sizeof(LONG_PTR) );
 141             break;
 142         }
 143         ret = !wine_server_call_err( req );
 144     }
 145     SERVER_END_REQ;
 146     return ret;
 147 }
 148
 149
 150 /***********************************************************************
 151  *           CLASS_GetMenuNameA
 152  *
 153  * Get the menu name as a ASCII string.
 154  */
 155 static inline LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 156 {
 157     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 158     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 159 }
 160
 161
 162 /***********************************************************************
 163  *           CLASS_GetMenuNameW
 164  *
 165  * Get the menu name as a Unicode string.
 166  */
 167 static inline LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 168 {
 169     return classPtr->menuName;
 170 }
 171
 172
 173 /***********************************************************************
 174  *           CLASS_SetMenuNameA
 175  *
 176  * Set the menu name in a class structure by copying the string.
 177  */
 178 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 179 {
 180     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 181     if (HIWORD(name))
 182     {
 183         DWORD lenA = strlen(name) + 1;
 184         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 185         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 186         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 187         memcpy( classPtr->menuName + lenW, name, lenA );
 188     }
 189     else classPtr->menuName = (LPWSTR)name;
 190 }
 191
 192
 193 /***********************************************************************
 194  *           CLASS_SetMenuNameW
 195  *
 196  * Set the menu name in a class structure by copying the string.
 197  */
 198 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 199 {
 200     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 201     if (HIWORD(name))
 202     {
 203         DWORD lenW = strlenW(name) + 1;
 204         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 205         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 206         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 207         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 208                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 209     }
 210     else classPtr->menuName = (LPWSTR)name;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           CLASS_FreeClass
 216  *
 217  * Free a class structure.
 218  */
 219 static void CLASS_FreeClass( CLASS *classPtr )
 220 {
 221     TRACE("%p\n", classPtr);
 222
 223     USER_Lock();
 224
 225     list_remove( &classPtr->entry );
 226     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 227         DeleteObject( classPtr->hbrBackground );
 228     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 229     HeapFree( GetProcessHeap(), 0, classPtr );
 230     USER_Unlock();
 231 }
 232
 233
 234 /***********************************************************************
 235  *           CLASS_FreeModuleClasses
 236  */
 237 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 238 {
 239     struct list *ptr, *next;
 240
 241     TRACE("0x%08x\n", hModule);
 242
 243     USER_Lock();
 244     for (ptr = list_head( &class_list ); ptr; ptr = next)
 245     {
 246         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 247         next = list_next( &class_list, ptr );
 248         if (class->hInstance == HINSTANCE_32(hModule))
 249         {
 250             BOOL ret;
 251
 252             SERVER_START_REQ( destroy_class )
 253             {
 254                 req->atom = class->atomName;
 255                 req->instance = class->hInstance;
 256                 ret = !wine_server_call_err( req );
 257             }
 258             SERVER_END_REQ;
 259             if (ret) CLASS_FreeClass( class );
 260         }
 261     }
 262     USER_Unlock();
 263 }
 264
 265
 266 /***********************************************************************
 267  *           CLASS_FindClassByAtom
 268  *
 269  * Return a pointer to the class.
 270  * hinstance has been normalized by the caller.
 271  */
 272 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 273 {
 274     struct list *ptr;
 275
 276     USER_Lock();
 277
 278     LIST_FOR_EACH( ptr, &class_list )
 279     {
 280         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 281         if (class->atomName != atom) continue;
 282         if (!hinstance || !class->local || class->hInstance == hinstance)
 283         {
 284             TRACE("0x%04x %p -> %p\n", atom, hinstance, class);
 285             return class;
 286         }
 287     }
 288     USER_Unlock();
 289     TRACE("0x%04x %p -> not found\n", atom, hinstance);
 290     return NULL;
 291 }
 292
 293
 294 /***********************************************************************
 295  *           CLASS_RegisterClass
 296  *
 297  * The real RegisterClass() functionality.
 298  * The atom is deleted no matter what.
 299  */
 300 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance, BOOL local,
 301                                    DWORD style, INT classExtra, INT winExtra )
 302 {
 303     CLASS *classPtr;
 304     BOOL ret;
 305
 306     TRACE("atom=0x%x hinst=%p style=0x%x clExtr=0x%x winExtr=0x%x\n",
 307           atom, hInstance, style, classExtra, winExtra );
 308
 309     /* Fix the extra bytes value */
 310
 311     if (classExtra < 0 || winExtra < 0)
 312     {
 313          SetLastError( ERROR_INVALID_PARAMETER );
 314          return NULL;
 315     }
 316     if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 317         WARN("Class extra bytes %d is > 40\n", classExtra);
 318     if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 319         WARN("Win extra bytes %d is > 40\n", winExtra );
 320
 321     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 322     if (!classPtr)
 323     {
 324         GlobalDeleteAtom( atom );
 325         return NULL;
 326     }
 327
 328     SERVER_START_REQ( create_class )
 329     {
 330         req->local      = local;
 331         req->atom       = atom;
 332         req->style      = style;
 333         req->instance   = hInstance;
 334         req->extra      = classExtra;
 335         req->win_extra  = winExtra;
 336         req->client_ptr = classPtr;
 337         ret = !wine_server_call_err( req );
 338     }
 339     SERVER_END_REQ;
 340     GlobalDeleteAtom( atom );  /* the server increased the atom ref count */
 341     if (!ret)
 342     {
 343         HeapFree( GetProcessHeap(), 0, classPtr );
 344         return NULL;
 345     }
 346
 347     classPtr->style       = style;
 348     classPtr->local       = local;
 349     classPtr->cbWndExtra  = winExtra;
 350     classPtr->cbClsExtra  = classExtra;
 351     classPtr->hInstance   = hInstance;
 352     classPtr->atomName    = atom;
 353
 354     /* Other non-null values must be set by caller */
 355
 356     USER_Lock();
 357     if (local) list_add_head( &class_list, &classPtr->entry );
 358     else list_add_tail( &class_list, &classPtr->entry );
 359     return classPtr;
 360 }
 361
 362
 363 /***********************************************************************
 364  *           register_builtin
 365  *
 366  * Register a builtin control class.
 367  * This allows having both ASCII and Unicode winprocs for the same class.
 368  */
 369 static CLASS *register_builtin( const struct builtin_class_descr *descr )
 370 {
 371     ATOM atom;
 372     CLASS *classPtr;
 373
 374     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 375
 376     if (!(classPtr = CLASS_RegisterClass( atom, user32_module, FALSE,
 377                                           descr->style, 0, descr->extra ))) return 0;
 378
 379     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 380     classPtr->hbrBackground = descr->brush;
 381     classPtr->winproc       = WINPROC_AllocProc( descr->procA, descr->procW );
 382     release_class_ptr( classPtr );
 383     return classPtr;
 384 }
 385
 386
 387 /***********************************************************************
 388  *           CLASS_RegisterBuiltinClasses
 389  */
 390 void CLASS_RegisterBuiltinClasses(void)
 391 {
 392     extern const struct builtin_class_descr BUTTON_builtin_class;
 393     extern const struct builtin_class_descr COMBO_builtin_class;
 394     extern const struct builtin_class_descr COMBOLBOX_builtin_class;
 395     extern const struct builtin_class_descr DIALOG_builtin_class;
 396     extern const struct builtin_class_descr DESKTOP_builtin_class;
 397     extern const struct builtin_class_descr EDIT_builtin_class;
 398     extern const struct builtin_class_descr ICONTITLE_builtin_class;
 399     extern const struct builtin_class_descr LISTBOX_builtin_class;
 400     extern const struct builtin_class_descr MDICLIENT_builtin_class;
 401     extern const struct builtin_class_descr MENU_builtin_class;
 402     extern const struct builtin_class_descr SCROLL_builtin_class;
 403     extern const struct builtin_class_descr STATIC_builtin_class;
 404
 405     register_builtin( &DESKTOP_builtin_class );
 406     register_builtin( &BUTTON_builtin_class );
 407     register_builtin( &COMBO_builtin_class );
 408     register_builtin( &COMBOLBOX_builtin_class );
 409     register_builtin( &DIALOG_builtin_class );
 410     register_builtin( &EDIT_builtin_class );
 411     register_builtin( &ICONTITLE_builtin_class );
 412     register_builtin( &LISTBOX_builtin_class );
 413     register_builtin( &MDICLIENT_builtin_class );
 414     register_builtin( &MENU_builtin_class );
 415     register_builtin( &SCROLL_builtin_class );
 416     register_builtin( &STATIC_builtin_class );
 417
 418     /* the DefWindowProc winprocs are magic too */
 419     WINPROC_AllocProc( DefWindowProcA, DefWindowProcW );
 420 }
 421
 422
 423 /***********************************************************************
 424  *           CLASS_AddWindow
 425  *
 426  * Add a new window using this class, and set the necessary
 427  * information inside the window structure.
 428  */
 429 void CLASS_AddWindow( CLASS *class, WND *win, BOOL unicode )
 430 {
 431     win->class    = class;
 432     win->clsStyle = class->style;
 433     win->winproc  = class->winproc;
 434     if (WINPROC_IsUnicode( win->winproc, unicode )) win->flags |= WIN_ISUNICODE;
 435 }
 436
 437
 438 /***********************************************************************
 439  *              RegisterClassA (USER32.@)
 440  *
 441  * Register a window class.
 442  *
 443  * RETURNS
 444  *      >0: Unique identifier
 445  *      0: Failure
 446  */
 447 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 448 {
 449     WNDCLASSEXA wcex;
 450
 451     wcex.cbSize        = sizeof(wcex);
 452     wcex.style         = wc->style;
 453     wcex.lpfnWndProc   = wc->lpfnWndProc;
 454     wcex.cbClsExtra    = wc->cbClsExtra;
 455     wcex.cbWndExtra    = wc->cbWndExtra;
 456     wcex.hInstance     = wc->hInstance;
 457     wcex.hIcon         = wc->hIcon;
 458     wcex.hCursor       = wc->hCursor;
 459     wcex.hbrBackground = wc->hbrBackground;
 460     wcex.lpszMenuName  = wc->lpszMenuName;
 461     wcex.lpszClassName = wc->lpszClassName;
 462     wcex.hIconSm       = 0;
 463     return RegisterClassExA( &wcex );
 464 }
 465
 466
 467 /***********************************************************************
 468  *              RegisterClassW (USER32.@)
 469  *
 470  * See RegisterClassA.
 471  */
 472 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 473 {
 474     WNDCLASSEXW wcex;
 475
 476     wcex.cbSize        = sizeof(wcex);
 477     wcex.style         = wc->style;
 478     wcex.lpfnWndProc   = wc->lpfnWndProc;
 479     wcex.cbClsExtra    = wc->cbClsExtra;
 480     wcex.cbWndExtra    = wc->cbWndExtra;
 481     wcex.hInstance     = wc->hInstance;
 482     wcex.hIcon         = wc->hIcon;
 483     wcex.hCursor       = wc->hCursor;
 484     wcex.hbrBackground = wc->hbrBackground;
 485     wcex.lpszMenuName  = wc->lpszMenuName;
 486     wcex.lpszClassName = wc->lpszClassName;
 487     wcex.hIconSm       = 0;
 488     return RegisterClassExW( &wcex );
 489 }
 490
 491
 492 /***********************************************************************
 493  *              RegisterClassExA (USER32.@)
 494  */
 495 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 496 {
 497     ATOM atom;
 498     CLASS *classPtr;
 499     HINSTANCE instance;
 500
 501     if (wc->hInstance == user32_module)
 502     {
 503         /* we can't register a class for user32 */
 504         SetLastError( ERROR_INVALID_PARAMETER );
 505         return 0;
 506     }
 507     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 508
 509     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 510
 511     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 512                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 513         return 0;
 514
 515     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 516           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 517           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 518
 519     classPtr->hIcon         = wc->hIcon;
 520     classPtr->hIconSm       = wc->hIconSm;
 521     classPtr->hCursor       = wc->hCursor;
 522     classPtr->hbrBackground = wc->hbrBackground;
 523     classPtr->winproc       = WINPROC_AllocProc( wc->lpfnWndProc, NULL );
 524     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 525     release_class_ptr( classPtr );
 526     return atom;
 527 }
 528
 529
 530 /***********************************************************************
 531  *              RegisterClassExW (USER32.@)
 532  */
 533 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 534 {
 535     ATOM atom;
 536     CLASS *classPtr;
 537     HINSTANCE instance;
 538
 539     if (wc->hInstance == user32_module)
 540     {
 541         /* we can't register a class for user32 */
 542         SetLastError( ERROR_INVALID_PARAMETER );
 543         return 0;
 544     }
 545     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 546
 547     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 548
 549     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 550                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 551         return 0;
 552
 553     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 554           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 555           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 556
 557     classPtr->hIcon         = wc->hIcon;
 558     classPtr->hIconSm       = wc->hIconSm;
 559     classPtr->hCursor       = wc->hCursor;
 560     classPtr->hbrBackground = wc->hbrBackground;
 561     classPtr->winproc       = WINPROC_AllocProc( NULL, wc->lpfnWndProc );
 562     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 563     release_class_ptr( classPtr );
 564     return atom;
 565 }
 566
 567
 568 /***********************************************************************
 569  *              UnregisterClassA (USER32.@)
 570  */
 571 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 572 {
 573     ATOM atom = HIWORD(className) ? GlobalFindAtomA( className ) : LOWORD(className);
 574     return UnregisterClassW( (LPCWSTR)MAKEINTATOM(atom), hInstance );
 575 }
 576
 577 /***********************************************************************
 578  *              UnregisterClassW (USER32.@)
 579  */
 580 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 581 {
 582     CLASS *classPtr = NULL;
 583     ATOM atom = HIWORD(className) ? GlobalFindAtomW( className ) : LOWORD(className);
 584
 585     TRACE("%s %p %x\n",debugstr_w(className), hInstance, atom);
 586
 587     if (!atom)
 588     {
 589         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 590         return FALSE;
 591     }
 592
 593     SERVER_START_REQ( destroy_class )
 594     {
 595         req->atom = atom;
 596         req->instance = hInstance;
 597         if (!wine_server_call_err( req )) classPtr = reply->client_ptr;
 598     }
 599     SERVER_END_REQ;
 600
 601     if (classPtr) CLASS_FreeClass( classPtr );
 602     return (classPtr != NULL);
 603 }
 604
 605
 606 /***********************************************************************
 607  *              GetClassWord (USER32.@)
 608  */
 609 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 610 {
 611     CLASS *class;
 612     WORD retvalue = 0;
 613
 614     if (offset < 0) return GetClassLongA( hwnd, offset );
 615
 616     TRACE("%p %x\n",hwnd, offset);
 617
 618     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 619
 620     if (class == CLASS_OTHER_PROCESS)
 621     {
 622         SERVER_START_REQ( set_class_info )
 623         {
 624             req->window = hwnd;
 625             req->flags = 0;
 626             req->extra_offset = offset;
 627             req->extra_size = sizeof(retvalue);
 628             if (!wine_server_call_err( req ))
 629                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 630         }
 631         SERVER_END_REQ;
 632         return retvalue;
 633     }
 634
 635     if (offset <= class->cbClsExtra - sizeof(WORD))
 636         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 637     else
 638         SetLastError( ERROR_INVALID_INDEX );
 639     release_class_ptr( class );
 640     return retvalue;
 641 }
 642
 643
 644 /***********************************************************************
 645  *             CLASS_GetClassLong
 646  *
 647  * Implementation of GetClassLong(Ptr)A/W
 648  */
 649 static ULONG_PTR CLASS_GetClassLong( HWND hwnd, INT offset, UINT size,
 650                                      BOOL unicode )
 651 {
 652     CLASS *class;
 653     ULONG_PTR retvalue = 0;
 654
 655     TRACE("%p %d\n", hwnd, offset);
 656
 657     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 658
 659     if (class == CLASS_OTHER_PROCESS)
 660     {
 661         SERVER_START_REQ( set_class_info )
 662         {
 663             req->window = hwnd;
 664             req->flags = 0;
 665             req->extra_offset = (offset >= 0) ? offset : -1;
 666             req->extra_size = (offset >= 0) ? size : 0;
 667             if (!wine_server_call_err( req ))
 668             {
 669                 switch(offset)
 670                 {
 671                 case GCLP_HBRBACKGROUND:
 672                 case GCLP_HCURSOR:
 673                 case GCLP_HICON:
 674                 case GCLP_HICONSM:
 675                 case GCLP_WNDPROC:
 676                 case GCLP_MENUNAME:
 677                     FIXME( "offset %d (%s) not supported on other process window %p\n",
 678                            offset, SPY_GetClassLongOffsetName(offset), hwnd );
 679                     SetLastError( ERROR_INVALID_HANDLE );
 680                     break;
 681                 case GCL_STYLE:
 682                     retvalue = reply->old_style;
 683                     break;
 684                 case GCL_CBWNDEXTRA:
 685                     retvalue = reply->old_win_extra;
 686                     break;
 687                 case GCL_CBCLSEXTRA:
 688                     retvalue = reply->old_extra;
 689                     break;
 690                 case GCLP_HMODULE:
 691                     retvalue = (ULONG_PTR)reply->old_instance;
 692                     break;
 693                 case GCW_ATOM:
 694                     retvalue = reply->old_atom;
 695                     break;
 696                 default:
 697                     if (offset >= 0)
 698                     {
 699                         if (size == sizeof(DWORD))
 700                         {
 701                             DWORD retdword;
 702                             memcpy( &retdword, &reply->old_extra_value, sizeof(DWORD) );
 703                             retvalue = retdword;
 704                         }
 705                         else
 706                             memcpy( &retvalue, &reply->old_extra_value,
 707                                     sizeof(ULONG_PTR) );
 708                     }
 709                     else SetLastError( ERROR_INVALID_INDEX );
 710                     break;
 711                 }
 712             }
 713         }
 714         SERVER_END_REQ;
 715         return retvalue;
 716     }
 717
 718     if (offset >= 0)
 719     {
 720         if (offset <= class->cbClsExtra - size)
 721         {
 722             if (size == sizeof(DWORD))
 723             {
 724                 DWORD retdword;
 725                 memcpy( &retdword, (char *)(class + 1) + offset, sizeof(DWORD) );
 726                 retvalue = retdword;
 727             }
 728             else
 729                 memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(ULONG_PTR) );
 730         }
 731         else
 732             SetLastError( ERROR_INVALID_INDEX );
 733         release_class_ptr( class );
 734         return retvalue;
 735     }
 736
 737     switch(offset)
 738     {
 739     case GCLP_HBRBACKGROUND:
 740         retvalue = (ULONG_PTR)class->hbrBackground;
 741         break;
 742     case GCLP_HCURSOR:
 743         retvalue = (ULONG_PTR)class->hCursor;
 744         break;
 745     case GCLP_HICON:
 746         retvalue = (ULONG_PTR)class->hIcon;
 747         break;
 748     case GCLP_HICONSM:
 749         retvalue = (ULONG_PTR)class->hIconSm;
 750         break;
 751     case GCL_STYLE:
 752         retvalue = class->style;
 753         break;
 754     case GCL_CBWNDEXTRA:
 755         retvalue = class->cbWndExtra;
 756         break;
 757     case GCL_CBCLSEXTRA:
 758         retvalue = class->cbClsExtra;
 759         break;
 760     case GCLP_HMODULE:
 761         retvalue = (ULONG_PTR)class->hInstance;
 762         break;
 763     case GCLP_WNDPROC:
 764         retvalue = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 765         break;
 766     case GCLP_MENUNAME:
 767         retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 768         if (unicode)
 769             retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 770         else
 771             retvalue = (ULONG_PTR)CLASS_GetMenuNameA( class );
 772         break;
 773     case GCW_ATOM:
 774         retvalue = class->atomName;
 775         break;
 776     default:
 777         SetLastError( ERROR_INVALID_INDEX );
 778         break;
 779     }
 780     release_class_ptr( class );
 781     return retvalue;
 782 }
 783
 784
 785 /***********************************************************************
 786  *              GetClassLongW (USER32.@)
 787  */
 788 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 789 {
 790     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), TRUE );
 791 }
 792
 793
 794
 795 /***********************************************************************
 796  *              GetClassLongA (USER32.@)
 797  */
 798 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 799 {
 800     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), FALSE );
 801 }
 802
 803
 804 /***********************************************************************
 805  *              SetClassWord (USER32.@)
 806  */
 807 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 808 {
 809     CLASS *class;
 810     WORD retval = 0;
 811
 812     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 813
 814     TRACE("%p %d %x\n", hwnd, offset, newval);
 815
 816     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 817
 818     SERVER_START_REQ( set_class_info )
 819     {
 820         req->window = hwnd;
 821         req->flags = SET_CLASS_EXTRA;
 822         req->extra_offset = offset;
 823         req->extra_size = sizeof(newval);
 824         memcpy( &req->extra_value, &newval, sizeof(newval) );
 825         if (!wine_server_call_err( req ))
 826         {
 827             void *ptr = (char *)(class + 1) + offset;
 828             memcpy( &retval, ptr, sizeof(retval) );
 829             memcpy( ptr, &newval, sizeof(newval) );
 830         }
 831     }
 832     SERVER_END_REQ;
 833     release_class_ptr( class );
 834     return retval;
 835 }
 836
 837
 838 /***********************************************************************
 839  *             CLASS_SetClassLong
 840  *
 841  * Implementation of SetClassLong(Ptr)A/W
 842  */
 843 static ULONG_PTR CLASS_SetClassLong( HWND hwnd, INT offset, LONG_PTR newval,
 844                                      UINT size, BOOL unicode )
 845 {
 846     CLASS *class;
 847     ULONG_PTR retval = 0;
 848
 849     TRACE("%p %d %lx\n", hwnd, offset, newval);
 850
 851     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 852
 853     if (offset >= 0)
 854     {
 855         if (set_server_info( hwnd, offset, newval, size ))
 856         {
 857             void *ptr = (char *)(class + 1) + offset;
 858             if ( size == sizeof(LONG) )
 859             {
 860                 DWORD retdword;
 861                 LONG newlong = newval;
 862                 memcpy( &retdword, ptr, sizeof(DWORD) );
 863                 memcpy( ptr, &newlong, sizeof(LONG) );
 864                 retval = retdword;
 865             }
 866             else
 867             {
 868                 memcpy( &retval, ptr, sizeof(ULONG_PTR) );
 869                 memcpy( ptr, &newval, sizeof(LONG_PTR) );
 870             }
 871         }
 872     }
 873     else switch(offset)
 874     {
 875     case GCLP_MENUNAME:
 876         if ( unicode )
 877             CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 878         else
 879             CLASS_SetMenuNameA( class, (LPCSTR)newval );
 880         retval = 0;  /* Old value is now meaningless anyway */
 881         break;
 882     case GCLP_WNDPROC:
 883         retval = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 884         class->winproc = WINPROC_AllocProc( unicode ? NULL : (WNDPROC)newval,
 885                                             unicode ? (WNDPROC)newval : NULL );
 886         break;
 887     case GCLP_HBRBACKGROUND:
 888         retval = (ULONG_PTR)class->hbrBackground;
 889         class->hbrBackground = (HBRUSH)newval;
 890         break;
 891     case GCLP_HCURSOR:
 892         retval = (ULONG_PTR)class->hCursor;
 893         class->hCursor = (HCURSOR)newval;
 894         break;
 895     case GCLP_HICON:
 896         retval = (ULONG_PTR)class->hIcon;
 897         class->hIcon = (HICON)newval;
 898         break;
 899     case GCLP_HICONSM:
 900         retval = (ULONG_PTR)class->hIconSm;
 901         class->hIconSm = (HICON)newval;
 902         break;
 903     case GCL_STYLE:
 904         if (!set_server_info( hwnd, offset, newval, size )) break;
 905         retval = class->style;
 906         class->style = newval;
 907         break;
 908     case GCL_CBWNDEXTRA:
 909         if (!set_server_info( hwnd, offset, newval, size )) break;
 910         retval = class->cbWndExtra;
 911         class->cbWndExtra = newval;
 912         break;
 913     case GCLP_HMODULE:
 914         if (!set_server_info( hwnd, offset, newval, size )) break;
 915         retval = (ULONG_PTR)class->hInstance;
 916         class->hInstance = (HINSTANCE)newval;
 917         break;
 918     case GCW_ATOM:
 919         if (!set_server_info( hwnd, offset, newval, size )) break;
 920         retval = class->atomName;
 921         class->atomName = newval;
 922         break;
 923     case GCL_CBCLSEXTRA:  /* cannot change this one */
 924         SetLastError( ERROR_INVALID_PARAMETER );
 925         break;
 926     default:
 927         SetLastError( ERROR_INVALID_INDEX );
 928         break;
 929     }
 930     release_class_ptr( class );
 931     return retval;
 932 }
 933
 934
 935 /***********************************************************************
 936  *              SetClassLongW (USER32.@)
 937  */
 938 DWORD WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 939 {
 940     TRACE("%p %d %x\n", hwnd, offset, newval);
 941
 942     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), TRUE );
 943 }
 944
 945
 946 /***********************************************************************
 947  *              SetClassLongA (USER32.@)
 948  */
 949 DWORD WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 950 {
 951     TRACE("%p %d %x\n", hwnd, offset, newval);
 952
 953     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), FALSE );
 954 }
 955
 956
 957 /***********************************************************************
 958  *              GetClassNameA (USER32.@)
 959  */
 960 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
 961 {
 962     char tmpbuf[MAX_ATOM_LEN + 1];
 963     INT ret;
 964
 965     TRACE("%p %p %d\n", hwnd, buffer, count);
 966
 967     if (count <= 0) return 0;
 968
 969     ret = GlobalGetAtomNameA( GetClassLongW( hwnd, GCW_ATOM ), tmpbuf, MAX_ATOM_LEN + 1 );
 970     if (ret)
 971     {
 972         ret = min(count - 1, ret);
 973         memcpy(buffer, tmpbuf, ret);
 974         buffer[ret] = 0;
 975     }
 976     return ret;
 977 }
 978
 979
 980 /***********************************************************************
 981  *              GetClassNameW (USER32.@)
 982  */
 983 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
 984 {
 985     WCHAR tmpbuf[MAX_ATOM_LEN + 1];
 986     INT ret;
 987
 988     TRACE("%p %p %d\n", hwnd, buffer, count);
 989
 990     if (count <= 0) return 0;
 991
 992     ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), tmpbuf, MAX_ATOM_LEN + 1 );
 993     if (ret)
 994     {
 995         ret = min(count - 1, ret);
 996         memcpy(buffer, tmpbuf, ret * sizeof(WCHAR));
 997         buffer[ret] = 0;
 998     }
 999     return ret;
1000 }
1001
1002
1003 /***********************************************************************
1004  *              RealGetWindowClassA (USER32.@)
1005  */
1006 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
1007 {
1008     return GetClassNameA( hwnd, buffer, count );
1009 }
1010
1011
1012 /***********************************************************************
1013  *              RealGetWindowClassW (USER32.@)
1014  */
1015 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1016 {
1017     return GetClassNameW( hwnd, buffer, count );
1018 }
1019
1020
1021 /***********************************************************************
1022  *              GetClassInfoA (USER32.@)
1023  */
1024 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1025 {
1026     WNDCLASSEXA wcex;
1027     UINT ret = GetClassInfoExA( 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  *              GetClassInfoW (USER32.@)
1048  */
1049 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1050 {
1051     WNDCLASSEXW wcex;
1052     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1053
1054     if (ret)
1055     {
1056         wc->style         = wcex.style;
1057         wc->lpfnWndProc   = wcex.lpfnWndProc;
1058         wc->cbClsExtra    = wcex.cbClsExtra;
1059         wc->cbWndExtra    = wcex.cbWndExtra;
1060         wc->hInstance     = wcex.hInstance;
1061         wc->hIcon         = wcex.hIcon;
1062         wc->hCursor       = wcex.hCursor;
1063         wc->hbrBackground = wcex.hbrBackground;
1064         wc->lpszMenuName  = wcex.lpszMenuName;
1065         wc->lpszClassName = wcex.lpszClassName;
1066     }
1067     return ret;
1068 }
1069
1070
1071 /***********************************************************************
1072  *              GetClassInfoExA (USER32.@)
1073  */
1074 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1075 {
1076     ATOM atom = HIWORD(name) ? GlobalFindAtomA( name ) : LOWORD(name);
1077     CLASS *classPtr;
1078
1079     TRACE("%p %s %x %p\n", hInstance, debugstr_a(name), atom, wc);
1080
1081     if (!hInstance) hInstance = user32_module;
1082
1083     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1084     {
1085         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1086         return FALSE;
1087     }
1088     wc->style         = classPtr->style;
1089     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, FALSE );
1090     wc->cbClsExtra    = classPtr->cbClsExtra;
1091     wc->cbWndExtra    = classPtr->cbWndExtra;
1092     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1093     wc->hIcon         = (HICON)classPtr->hIcon;
1094     wc->hIconSm       = (HICON)classPtr->hIconSm;
1095     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1096     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1097     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1098     wc->lpszClassName = name;
1099     release_class_ptr( classPtr );
1100
1101     /* We must return the atom of the class here instead of just TRUE. */
1102     return atom;
1103 }
1104
1105
1106 /***********************************************************************
1107  *              GetClassInfoExW (USER32.@)
1108  */
1109 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1110 {
1111     ATOM atom = HIWORD(name) ? GlobalFindAtomW( name ) : LOWORD(name);
1112     CLASS *classPtr;
1113
1114     TRACE("%p %s %x %p\n", hInstance, debugstr_w(name), atom, wc);
1115
1116     if (!hInstance) hInstance = user32_module;
1117
1118     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1119     {
1120         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1121         return FALSE;
1122     }
1123     wc->style         = classPtr->style;
1124     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, TRUE );
1125     wc->cbClsExtra    = classPtr->cbClsExtra;
1126     wc->cbWndExtra    = classPtr->cbWndExtra;
1127     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1128     wc->hIcon         = (HICON)classPtr->hIcon;
1129     wc->hIconSm       = (HICON)classPtr->hIconSm;
1130     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1131     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1132     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1133     wc->lpszClassName = name;
1134     release_class_ptr( classPtr );
1135
1136     /* We must return the atom of the class here instead of just TRUE. */
1137     return atom;
1138 }
1139
1140
1141 #if 0  /* toolhelp is in kernel, so this cannot work */
1142
1143 /***********************************************************************
1144  *              ClassFirst (TOOLHELP.69)
1145  */
1146 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1147 {
1148     TRACE("%p\n",pClassEntry);
1149     pClassEntry->wNext = 1;
1150     return ClassNext16( pClassEntry );
1151 }
1152
1153
1154 /***********************************************************************
1155  *              ClassNext (TOOLHELP.70)
1156  */
1157 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1158 {
1159     int i;
1160     CLASS *class = firstClass;
1161
1162     TRACE("%p\n",pClassEntry);
1163
1164     if (!pClassEntry->wNext) return FALSE;
1165     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1166     if (!class)
1167     {
1168         pClassEntry->wNext = 0;
1169         return FALSE;
1170     }
1171     pClassEntry->hInst = class->hInstance;
1172     pClassEntry->wNext++;
1173     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1174                           sizeof(pClassEntry->szClassName) );
1175     return TRUE;
1176 }
1177 #endif
1178
1179 /* 64bit versions */
1180
1181 #ifdef GetClassLongPtrA
1182 #undef GetClassLongPtrA
1183 #endif
1184
1185 #ifdef GetClassLongPtrW
1186 #undef GetClassLongPtrW
1187 #endif
1188
1189 #ifdef SetClassLongPtrA
1190 #undef SetClassLongPtrA
1191 #endif
1192
1193 #ifdef SetClassLongPtrW
1194 #undef SetClassLongPtrW
1195 #endif
1196
1197 /***********************************************************************
1198  *              GetClassLongPtrA (USER32.@)
1199  */
1200 ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
1201 {
1202     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), FALSE );
1203 }
1204
1205 /***********************************************************************
1206  *              GetClassLongPtrW (USER32.@)
1207  */
1208 ULONG_PTR WINAPI GetClassLongPtrW( HWND hwnd, INT offset )
1209 {
1210     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), TRUE );
1211 }
1212
1213 /***********************************************************************
1214  *              SetClassLongPtrW (USER32.@)
1215  */
1216 ULONG_PTR WINAPI SetClassLongPtrW( HWND hwnd, INT offset, LONG_PTR newval )
1217 {
1218     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), TRUE );
1219 }
1220
1221 /***********************************************************************
1222  *              SetClassLongPtrA (USER32.@)
1223  */
1224 ULONG_PTR WINAPI SetClassLongPtrA( HWND hwnd, INT offset, LONG_PTR newval )
1225 {
1226     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), FALSE );
1227 }