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 #define MAX_ATOM_LEN 255 /* from dlls/kernel32/atom.c */
  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     WCHAR            name[MAX_ATOM_LEN + 1];
  62 } CLASS;
  63
  64 static struct list class_list = LIST_INIT( class_list );
  65
  66 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  67
  68 /***********************************************************************
  69  *           get_class_ptr
  70  */
  71 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  72 {
  73     WND *ptr = WIN_GetPtr( hwnd );
  74
  75     if (ptr)
  76     {
  77         if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP) return ptr->class;
  78         if (!write_access) return CLASS_OTHER_PROCESS;
  79
  80         /* modifying classes in other processes is not allowed */
  81         if (ptr == WND_DESKTOP || IsWindow( hwnd ))
  82         {
  83             SetLastError( ERROR_ACCESS_DENIED );
  84             return NULL;
  85         }
  86     }
  87     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  88     return NULL;
  89 }
  90
  91
  92 /***********************************************************************
  93  *           release_class_ptr
  94  */
  95 static inline void release_class_ptr( CLASS *ptr )
  96 {
  97     USER_Unlock();
  98 }
  99
 100
 101 /***********************************************************************
 102  *           get_int_atom_value
 103  */
 104 ATOM get_int_atom_value( LPCWSTR name )
 105 {
 106     UINT ret = 0;
 107
 108     if (IS_INTRESOURCE(name)) return LOWORD(name);
 109     if (*name++ != '#') return 0;
 110     while (*name)
 111     {
 112         if (*name < '0' || *name > '9') return 0;
 113         ret = ret * 10 + *name++ - '0';
 114         if (ret > 0xffff) return 0;
 115     }
 116     return ret;
 117 }
 118
 119
 120 /***********************************************************************
 121  *           set_server_info
 122  *
 123  * Set class info with the wine server.
 124  */
 125 static BOOL set_server_info( HWND hwnd, INT offset, LONG_PTR newval, UINT size )
 126 {
 127     BOOL ret;
 128
 129     SERVER_START_REQ( set_class_info )
 130     {
 131         req->window = hwnd;
 132         req->extra_offset = -1;
 133         switch(offset)
 134         {
 135         case GCW_ATOM:
 136             req->flags = SET_CLASS_ATOM;
 137             req->atom = newval;
 138         case GCL_STYLE:
 139             req->flags = SET_CLASS_STYLE;
 140             req->style = newval;
 141             break;
 142         case GCL_CBWNDEXTRA:
 143             req->flags = SET_CLASS_WINEXTRA;
 144             req->win_extra = newval;
 145             break;
 146         case GCLP_HMODULE:
 147             req->flags = SET_CLASS_INSTANCE;
 148             req->instance = (void *)newval;
 149             break;
 150         default:
 151             assert( offset >= 0 );
 152             req->flags = SET_CLASS_EXTRA;
 153             req->extra_offset = offset;
 154             req->extra_size = size;
 155             if ( size == sizeof(LONG) )
 156             {
 157                 LONG newlong = newval;
 158                 memcpy( &req->extra_value, &newlong, sizeof(LONG) );
 159             }
 160             else
 161                 memcpy( &req->extra_value, &newval, sizeof(LONG_PTR) );
 162             break;
 163         }
 164         ret = !wine_server_call_err( req );
 165     }
 166     SERVER_END_REQ;
 167     return ret;
 168 }
 169
 170
 171 /***********************************************************************
 172  *           CLASS_GetMenuNameA
 173  *
 174  * Get the menu name as a ASCII string.
 175  */
 176 static inline LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 177 {
 178     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 179     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 180 }
 181
 182
 183 /***********************************************************************
 184  *           CLASS_GetMenuNameW
 185  *
 186  * Get the menu name as a Unicode string.
 187  */
 188 static inline LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 189 {
 190     return classPtr->menuName;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           CLASS_SetMenuNameA
 196  *
 197  * Set the menu name in a class structure by copying the string.
 198  */
 199 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 200 {
 201     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 202     if (HIWORD(name))
 203     {
 204         DWORD lenA = strlen(name) + 1;
 205         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 206         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 207         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 208         memcpy( classPtr->menuName + lenW, name, lenA );
 209     }
 210     else classPtr->menuName = (LPWSTR)name;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           CLASS_SetMenuNameW
 216  *
 217  * Set the menu name in a class structure by copying the string.
 218  */
 219 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 220 {
 221     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 222     if (HIWORD(name))
 223     {
 224         DWORD lenW = strlenW(name) + 1;
 225         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 226         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 227         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 228         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 229                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 230     }
 231     else classPtr->menuName = (LPWSTR)name;
 232 }
 233
 234
 235 /***********************************************************************
 236  *           CLASS_FreeClass
 237  *
 238  * Free a class structure.
 239  */
 240 static void CLASS_FreeClass( CLASS *classPtr )
 241 {
 242     TRACE("%p\n", classPtr);
 243
 244     USER_Lock();
 245
 246     list_remove( &classPtr->entry );
 247     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 248         DeleteObject( classPtr->hbrBackground );
 249     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 250     HeapFree( GetProcessHeap(), 0, classPtr );
 251     USER_Unlock();
 252 }
 253
 254
 255 /***********************************************************************
 256  *           CLASS_FreeModuleClasses
 257  */
 258 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 259 {
 260     struct list *ptr, *next;
 261
 262     TRACE("0x%08x\n", hModule);
 263
 264     USER_Lock();
 265     for (ptr = list_head( &class_list ); ptr; ptr = next)
 266     {
 267         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 268         next = list_next( &class_list, ptr );
 269         if (class->hInstance == HINSTANCE_32(hModule))
 270         {
 271             BOOL ret;
 272
 273             SERVER_START_REQ( destroy_class )
 274             {
 275                 req->atom = class->atomName;
 276                 req->instance = class->hInstance;
 277                 ret = !wine_server_call_err( req );
 278             }
 279             SERVER_END_REQ;
 280             if (ret) CLASS_FreeClass( class );
 281         }
 282     }
 283     USER_Unlock();
 284 }
 285
 286
 287 /***********************************************************************
 288  *           CLASS_FindClass
 289  *
 290  * Return a pointer to the class.
 291  * hinstance has been normalized by the caller.
 292  */
 293 static CLASS *CLASS_FindClass( LPCWSTR name, HINSTANCE hinstance )
 294 {
 295     struct list *ptr;
 296     ATOM atom = get_int_atom_value( name );
 297
 298     USER_Lock();
 299
 300     LIST_FOR_EACH( ptr, &class_list )
 301     {
 302         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 303         if (atom)
 304         {
 305             if (class->atomName != atom) continue;
 306         }
 307         else
 308         {
 309             if (!name || strcmpiW( class->name, name )) continue;
 310         }
 311         if (!hinstance || !class->local || class->hInstance == hinstance)
 312         {
 313             TRACE("%s %p -> %p\n", debugstr_w(name), hinstance, class);
 314             return class;
 315         }
 316     }
 317     USER_Unlock();
 318     TRACE("%s %p -> not found\n", debugstr_w(name), hinstance);
 319     return NULL;
 320 }
 321
 322
 323 /***********************************************************************
 324  *           CLASS_RegisterClass
 325  *
 326  * The real RegisterClass() functionality.
 327  */
 328 static CLASS *CLASS_RegisterClass( LPCWSTR name, HINSTANCE hInstance, BOOL local,
 329                                    DWORD style, INT classExtra, INT winExtra )
 330 {
 331     CLASS *classPtr;
 332     BOOL ret;
 333
 334     TRACE("name=%s hinst=%p style=0x%x clExtr=0x%x winExtr=0x%x\n",
 335           debugstr_w(name), hInstance, style, classExtra, winExtra );
 336
 337     /* Fix the extra bytes value */
 338
 339     if (classExtra < 0 || winExtra < 0)
 340     {
 341          SetLastError( ERROR_INVALID_PARAMETER );
 342          return NULL;
 343     }
 344     if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 345         WARN("Class extra bytes %d is > 40\n", classExtra);
 346     if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 347         WARN("Win extra bytes %d is > 40\n", winExtra );
 348
 349     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 350     if (!classPtr) return NULL;
 351
 352     classPtr->atomName = get_int_atom_value( name );
 353     if (!classPtr->atomName && name) strcpyW( classPtr->name, name );
 354     else GlobalGetAtomNameW( classPtr->atomName, classPtr->name, sizeof(classPtr->name)/sizeof(WCHAR) );
 355
 356     SERVER_START_REQ( create_class )
 357     {
 358         req->local      = local;
 359         req->style      = style;
 360         req->instance   = hInstance;
 361         req->extra      = classExtra;
 362         req->win_extra  = winExtra;
 363         req->client_ptr = classPtr;
 364         req->atom       = classPtr->atomName;
 365         if (!req->atom && name) wine_server_add_data( req, name, strlenW(name) * sizeof(WCHAR) );
 366         ret = !wine_server_call_err( req );
 367         classPtr->atomName = reply->atom;
 368     }
 369     SERVER_END_REQ;
 370     if (!ret)
 371     {
 372         HeapFree( GetProcessHeap(), 0, classPtr );
 373         return NULL;
 374     }
 375
 376     classPtr->style       = style;
 377     classPtr->local       = local;
 378     classPtr->cbWndExtra  = winExtra;
 379     classPtr->cbClsExtra  = classExtra;
 380     classPtr->hInstance   = hInstance;
 381
 382     /* Other non-null values must be set by caller */
 383
 384     USER_Lock();
 385     if (local) list_add_head( &class_list, &classPtr->entry );
 386     else list_add_tail( &class_list, &classPtr->entry );
 387     return classPtr;
 388 }
 389
 390
 391 /***********************************************************************
 392  *           register_builtin
 393  *
 394  * Register a builtin control class.
 395  * This allows having both ASCII and Unicode winprocs for the same class.
 396  */
 397 static WNDPROC register_builtin( const struct builtin_class_descr *descr )
 398 {
 399     CLASS *classPtr;
 400
 401     if (!(classPtr = CLASS_RegisterClass( descr->name, user32_module, FALSE,
 402                                           descr->style, 0, descr->extra ))) return 0;
 403
 404     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 405     classPtr->hbrBackground = descr->brush;
 406     classPtr->winproc       = WINPROC_AllocProc( descr->procA, descr->procW );
 407     release_class_ptr( classPtr );
 408     return classPtr->winproc;
 409 }
 410
 411
 412 /***********************************************************************
 413  *           CLASS_RegisterBuiltinClasses
 414  */
 415 void CLASS_RegisterBuiltinClasses(void)
 416 {
 417     register_builtin( &DESKTOP_builtin_class );
 418     register_builtin( &BUTTON_builtin_class );
 419     register_builtin( &COMBO_builtin_class );
 420     register_builtin( &COMBOLBOX_builtin_class );
 421     register_builtin( &DIALOG_builtin_class );
 422     EDIT_winproc_handle = register_builtin( &EDIT_builtin_class );
 423     register_builtin( &ICONTITLE_builtin_class );
 424     register_builtin( &LISTBOX_builtin_class );
 425     register_builtin( &MDICLIENT_builtin_class );
 426     register_builtin( &MENU_builtin_class );
 427     register_builtin( &SCROLL_builtin_class );
 428     register_builtin( &STATIC_builtin_class );
 429
 430     /* the DefWindowProc winprocs are magic too */
 431     WINPROC_AllocProc( DefWindowProcA, DefWindowProcW );
 432 }
 433
 434
 435 /***********************************************************************
 436  *           CLASS_AddWindow
 437  *
 438  * Add a new window using this class, and set the necessary
 439  * information inside the window structure.
 440  */
 441 void CLASS_AddWindow( CLASS *class, WND *win, BOOL unicode )
 442 {
 443     win->class    = class;
 444     win->clsStyle = class->style;
 445     win->winproc  = class->winproc;
 446     if (WINPROC_IsUnicode( win->winproc, unicode )) win->flags |= WIN_ISUNICODE;
 447 }
 448
 449
 450 /***********************************************************************
 451  *              RegisterClassA (USER32.@)
 452  *
 453  * Register a window class.
 454  *
 455  * RETURNS
 456  *      >0: Unique identifier
 457  *      0: Failure
 458  */
 459 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 460 {
 461     WNDCLASSEXA wcex;
 462
 463     wcex.cbSize        = sizeof(wcex);
 464     wcex.style         = wc->style;
 465     wcex.lpfnWndProc   = wc->lpfnWndProc;
 466     wcex.cbClsExtra    = wc->cbClsExtra;
 467     wcex.cbWndExtra    = wc->cbWndExtra;
 468     wcex.hInstance     = wc->hInstance;
 469     wcex.hIcon         = wc->hIcon;
 470     wcex.hCursor       = wc->hCursor;
 471     wcex.hbrBackground = wc->hbrBackground;
 472     wcex.lpszMenuName  = wc->lpszMenuName;
 473     wcex.lpszClassName = wc->lpszClassName;
 474     wcex.hIconSm       = 0;
 475     return RegisterClassExA( &wcex );
 476 }
 477
 478
 479 /***********************************************************************
 480  *              RegisterClassW (USER32.@)
 481  *
 482  * See RegisterClassA.
 483  */
 484 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 485 {
 486     WNDCLASSEXW wcex;
 487
 488     wcex.cbSize        = sizeof(wcex);
 489     wcex.style         = wc->style;
 490     wcex.lpfnWndProc   = wc->lpfnWndProc;
 491     wcex.cbClsExtra    = wc->cbClsExtra;
 492     wcex.cbWndExtra    = wc->cbWndExtra;
 493     wcex.hInstance     = wc->hInstance;
 494     wcex.hIcon         = wc->hIcon;
 495     wcex.hCursor       = wc->hCursor;
 496     wcex.hbrBackground = wc->hbrBackground;
 497     wcex.lpszMenuName  = wc->lpszMenuName;
 498     wcex.lpszClassName = wc->lpszClassName;
 499     wcex.hIconSm       = 0;
 500     return RegisterClassExW( &wcex );
 501 }
 502
 503
 504 /***********************************************************************
 505  *              RegisterClassExA (USER32.@)
 506  */
 507 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 508 {
 509     ATOM atom;
 510     CLASS *classPtr;
 511     HINSTANCE instance;
 512
 513     if (wc->hInstance == user32_module)
 514     {
 515         /* we can't register a class for user32 */
 516         SetLastError( ERROR_INVALID_PARAMETER );
 517         return 0;
 518     }
 519     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 520
 521     if (!IS_INTRESOURCE(wc->lpszClassName))
 522     {
 523         WCHAR name[MAX_ATOM_LEN + 1];
 524
 525         if (!MultiByteToWideChar( CP_ACP, 0, wc->lpszClassName, -1, name, MAX_ATOM_LEN + 1 )) return 0;
 526         classPtr = CLASS_RegisterClass( name, instance, !(wc->style & CS_GLOBALCLASS),
 527                                         wc->style, wc->cbClsExtra, wc->cbWndExtra );
 528     }
 529     else
 530     {
 531         classPtr = CLASS_RegisterClass( (LPCWSTR)wc->lpszClassName, instance,
 532                                         !(wc->style & CS_GLOBALCLASS), wc->style,
 533                                         wc->cbClsExtra, wc->cbWndExtra );
 534     }
 535     if (!classPtr) return 0;
 536     atom = classPtr->atomName;
 537
 538     TRACE("name=%s atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 539           debugstr_a(wc->lpszClassName), atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 540           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 541
 542     classPtr->hIcon         = wc->hIcon;
 543     classPtr->hIconSm       = wc->hIconSm;
 544     classPtr->hCursor       = wc->hCursor;
 545     classPtr->hbrBackground = wc->hbrBackground;
 546     classPtr->winproc       = WINPROC_AllocProc( wc->lpfnWndProc, NULL );
 547     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 548     release_class_ptr( classPtr );
 549     return atom;
 550 }
 551
 552
 553 /***********************************************************************
 554  *              RegisterClassExW (USER32.@)
 555  */
 556 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 557 {
 558     ATOM atom;
 559     CLASS *classPtr;
 560     HINSTANCE instance;
 561
 562     if (wc->hInstance == user32_module)
 563     {
 564         /* we can't register a class for user32 */
 565         SetLastError( ERROR_INVALID_PARAMETER );
 566         return 0;
 567     }
 568     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 569
 570     if (!(classPtr = CLASS_RegisterClass( wc->lpszClassName, instance, !(wc->style & CS_GLOBALCLASS),
 571                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 572         return 0;
 573
 574     atom = classPtr->atomName;
 575
 576     TRACE("name=%s atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 577           debugstr_w(wc->lpszClassName), atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 578           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 579
 580     classPtr->hIcon         = wc->hIcon;
 581     classPtr->hIconSm       = wc->hIconSm;
 582     classPtr->hCursor       = wc->hCursor;
 583     classPtr->hbrBackground = wc->hbrBackground;
 584     classPtr->winproc       = WINPROC_AllocProc( NULL, wc->lpfnWndProc );
 585     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 586     release_class_ptr( classPtr );
 587     return atom;
 588 }
 589
 590
 591 /***********************************************************************
 592  *              UnregisterClassA (USER32.@)
 593  */
 594 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 595 {
 596     if (!IS_INTRESOURCE(className))
 597     {
 598         WCHAR name[MAX_ATOM_LEN + 1];
 599
 600         if (!MultiByteToWideChar( CP_ACP, 0, className, -1, name, MAX_ATOM_LEN + 1 ))
 601             return FALSE;
 602         return UnregisterClassW( name, hInstance );
 603     }
 604     return UnregisterClassW( (LPCWSTR)className, hInstance );
 605 }
 606
 607 /***********************************************************************
 608  *              UnregisterClassW (USER32.@)
 609  */
 610 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 611 {
 612     CLASS *classPtr = NULL;
 613
 614     SERVER_START_REQ( destroy_class )
 615     {
 616         req->instance = hInstance;
 617         if (!(req->atom = get_int_atom_value(className)) && className)
 618             wine_server_add_data( req, className, strlenW(className) * sizeof(WCHAR) );
 619         if (!wine_server_call_err( req )) classPtr = reply->client_ptr;
 620     }
 621     SERVER_END_REQ;
 622
 623     if (classPtr) CLASS_FreeClass( classPtr );
 624     return (classPtr != NULL);
 625 }
 626
 627
 628 /***********************************************************************
 629  *              GetClassWord (USER32.@)
 630  */
 631 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 632 {
 633     CLASS *class;
 634     WORD retvalue = 0;
 635
 636     if (offset < 0) return GetClassLongA( hwnd, offset );
 637
 638     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 639
 640     if (class == CLASS_OTHER_PROCESS)
 641     {
 642         SERVER_START_REQ( set_class_info )
 643         {
 644             req->window = hwnd;
 645             req->flags = 0;
 646             req->extra_offset = offset;
 647             req->extra_size = sizeof(retvalue);
 648             if (!wine_server_call_err( req ))
 649                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 650         }
 651         SERVER_END_REQ;
 652         return retvalue;
 653     }
 654
 655     if (offset <= class->cbClsExtra - sizeof(WORD))
 656         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 657     else
 658         SetLastError( ERROR_INVALID_INDEX );
 659     release_class_ptr( class );
 660     return retvalue;
 661 }
 662
 663
 664 /***********************************************************************
 665  *             CLASS_GetClassLong
 666  *
 667  * Implementation of GetClassLong(Ptr)A/W
 668  */
 669 static ULONG_PTR CLASS_GetClassLong( HWND hwnd, INT offset, UINT size,
 670                                      BOOL unicode )
 671 {
 672     CLASS *class;
 673     ULONG_PTR retvalue = 0;
 674
 675     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 676
 677     if (class == CLASS_OTHER_PROCESS)
 678     {
 679         SERVER_START_REQ( set_class_info )
 680         {
 681             req->window = hwnd;
 682             req->flags = 0;
 683             req->extra_offset = (offset >= 0) ? offset : -1;
 684             req->extra_size = (offset >= 0) ? size : 0;
 685             if (!wine_server_call_err( req ))
 686             {
 687                 switch(offset)
 688                 {
 689                 case GCLP_HBRBACKGROUND:
 690                 case GCLP_HCURSOR:
 691                 case GCLP_HICON:
 692                 case GCLP_HICONSM:
 693                 case GCLP_WNDPROC:
 694                 case GCLP_MENUNAME:
 695                     FIXME( "offset %d (%s) not supported on other process window %p\n",
 696                            offset, SPY_GetClassLongOffsetName(offset), hwnd );
 697                     SetLastError( ERROR_INVALID_HANDLE );
 698                     break;
 699                 case GCL_STYLE:
 700                     retvalue = reply->old_style;
 701                     break;
 702                 case GCL_CBWNDEXTRA:
 703                     retvalue = reply->old_win_extra;
 704                     break;
 705                 case GCL_CBCLSEXTRA:
 706                     retvalue = reply->old_extra;
 707                     break;
 708                 case GCLP_HMODULE:
 709                     retvalue = (ULONG_PTR)reply->old_instance;
 710                     break;
 711                 case GCW_ATOM:
 712                     retvalue = reply->old_atom;
 713                     break;
 714                 default:
 715                     if (offset >= 0)
 716                     {
 717                         if (size == sizeof(DWORD))
 718                         {
 719                             DWORD retdword;
 720                             memcpy( &retdword, &reply->old_extra_value, sizeof(DWORD) );
 721                             retvalue = retdword;
 722                         }
 723                         else
 724                             memcpy( &retvalue, &reply->old_extra_value,
 725                                     sizeof(ULONG_PTR) );
 726                     }
 727                     else SetLastError( ERROR_INVALID_INDEX );
 728                     break;
 729                 }
 730             }
 731         }
 732         SERVER_END_REQ;
 733         return retvalue;
 734     }
 735
 736     if (offset >= 0)
 737     {
 738         if (offset <= class->cbClsExtra - size)
 739         {
 740             if (size == sizeof(DWORD))
 741             {
 742                 DWORD retdword;
 743                 memcpy( &retdword, (char *)(class + 1) + offset, sizeof(DWORD) );
 744                 retvalue = retdword;
 745             }
 746             else
 747                 memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(ULONG_PTR) );
 748         }
 749         else
 750             SetLastError( ERROR_INVALID_INDEX );
 751         release_class_ptr( class );
 752         return retvalue;
 753     }
 754
 755     switch(offset)
 756     {
 757     case GCLP_HBRBACKGROUND:
 758         retvalue = (ULONG_PTR)class->hbrBackground;
 759         break;
 760     case GCLP_HCURSOR:
 761         retvalue = (ULONG_PTR)class->hCursor;
 762         break;
 763     case GCLP_HICON:
 764         retvalue = (ULONG_PTR)class->hIcon;
 765         break;
 766     case GCLP_HICONSM:
 767         retvalue = (ULONG_PTR)class->hIconSm;
 768         break;
 769     case GCL_STYLE:
 770         retvalue = class->style;
 771         break;
 772     case GCL_CBWNDEXTRA:
 773         retvalue = class->cbWndExtra;
 774         break;
 775     case GCL_CBCLSEXTRA:
 776         retvalue = class->cbClsExtra;
 777         break;
 778     case GCLP_HMODULE:
 779         retvalue = (ULONG_PTR)class->hInstance;
 780         break;
 781     case GCLP_WNDPROC:
 782         retvalue = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 783         break;
 784     case GCLP_MENUNAME:
 785         retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 786         if (unicode)
 787             retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 788         else
 789             retvalue = (ULONG_PTR)CLASS_GetMenuNameA( class );
 790         break;
 791     case GCW_ATOM:
 792         retvalue = class->atomName;
 793         break;
 794     default:
 795         SetLastError( ERROR_INVALID_INDEX );
 796         break;
 797     }
 798     release_class_ptr( class );
 799     return retvalue;
 800 }
 801
 802
 803 /***********************************************************************
 804  *              GetClassLongW (USER32.@)
 805  */
 806 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 807 {
 808     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), TRUE );
 809 }
 810
 811
 812
 813 /***********************************************************************
 814  *              GetClassLongA (USER32.@)
 815  */
 816 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 817 {
 818     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), FALSE );
 819 }
 820
 821
 822 /***********************************************************************
 823  *              SetClassWord (USER32.@)
 824  */
 825 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 826 {
 827     CLASS *class;
 828     WORD retval = 0;
 829
 830     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 831
 832     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 833
 834     SERVER_START_REQ( set_class_info )
 835     {
 836         req->window = hwnd;
 837         req->flags = SET_CLASS_EXTRA;
 838         req->extra_offset = offset;
 839         req->extra_size = sizeof(newval);
 840         memcpy( &req->extra_value, &newval, sizeof(newval) );
 841         if (!wine_server_call_err( req ))
 842         {
 843             void *ptr = (char *)(class + 1) + offset;
 844             memcpy( &retval, ptr, sizeof(retval) );
 845             memcpy( ptr, &newval, sizeof(newval) );
 846         }
 847     }
 848     SERVER_END_REQ;
 849     release_class_ptr( class );
 850     return retval;
 851 }
 852
 853
 854 /***********************************************************************
 855  *             CLASS_SetClassLong
 856  *
 857  * Implementation of SetClassLong(Ptr)A/W
 858  */
 859 static ULONG_PTR CLASS_SetClassLong( HWND hwnd, INT offset, LONG_PTR newval,
 860                                      UINT size, BOOL unicode )
 861 {
 862     CLASS *class;
 863     ULONG_PTR retval = 0;
 864
 865     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 866
 867     if (offset >= 0)
 868     {
 869         if (set_server_info( hwnd, offset, newval, size ))
 870         {
 871             void *ptr = (char *)(class + 1) + offset;
 872             if ( size == sizeof(LONG) )
 873             {
 874                 DWORD retdword;
 875                 LONG newlong = newval;
 876                 memcpy( &retdword, ptr, sizeof(DWORD) );
 877                 memcpy( ptr, &newlong, sizeof(LONG) );
 878                 retval = retdword;
 879             }
 880             else
 881             {
 882                 memcpy( &retval, ptr, sizeof(ULONG_PTR) );
 883                 memcpy( ptr, &newval, sizeof(LONG_PTR) );
 884             }
 885         }
 886     }
 887     else switch(offset)
 888     {
 889     case GCLP_MENUNAME:
 890         if ( unicode )
 891             CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 892         else
 893             CLASS_SetMenuNameA( class, (LPCSTR)newval );
 894         retval = 0;  /* Old value is now meaningless anyway */
 895         break;
 896     case GCLP_WNDPROC:
 897         retval = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 898         class->winproc = WINPROC_AllocProc( unicode ? NULL : (WNDPROC)newval,
 899                                             unicode ? (WNDPROC)newval : NULL );
 900         break;
 901     case GCLP_HBRBACKGROUND:
 902         retval = (ULONG_PTR)class->hbrBackground;
 903         class->hbrBackground = (HBRUSH)newval;
 904         break;
 905     case GCLP_HCURSOR:
 906         retval = (ULONG_PTR)class->hCursor;
 907         class->hCursor = (HCURSOR)newval;
 908         break;
 909     case GCLP_HICON:
 910         retval = (ULONG_PTR)class->hIcon;
 911         class->hIcon = (HICON)newval;
 912         break;
 913     case GCLP_HICONSM:
 914         retval = (ULONG_PTR)class->hIconSm;
 915         class->hIconSm = (HICON)newval;
 916         break;
 917     case GCL_STYLE:
 918         if (!set_server_info( hwnd, offset, newval, size )) break;
 919         retval = class->style;
 920         class->style = newval;
 921         break;
 922     case GCL_CBWNDEXTRA:
 923         if (!set_server_info( hwnd, offset, newval, size )) break;
 924         retval = class->cbWndExtra;
 925         class->cbWndExtra = newval;
 926         break;
 927     case GCLP_HMODULE:
 928         if (!set_server_info( hwnd, offset, newval, size )) break;
 929         retval = (ULONG_PTR)class->hInstance;
 930         class->hInstance = (HINSTANCE)newval;
 931         break;
 932     case GCW_ATOM:
 933         if (!set_server_info( hwnd, offset, newval, size )) break;
 934         retval = class->atomName;
 935         class->atomName = newval;
 936         GlobalGetAtomNameW( newval, class->name, sizeof(class->name)/sizeof(WCHAR) );
 937         break;
 938     case GCL_CBCLSEXTRA:  /* cannot change this one */
 939         SetLastError( ERROR_INVALID_PARAMETER );
 940         break;
 941     default:
 942         SetLastError( ERROR_INVALID_INDEX );
 943         break;
 944     }
 945     release_class_ptr( class );
 946     return retval;
 947 }
 948
 949
 950 /***********************************************************************
 951  *              SetClassLongW (USER32.@)
 952  */
 953 DWORD WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 954 {
 955     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), TRUE );
 956 }
 957
 958
 959 /***********************************************************************
 960  *              SetClassLongA (USER32.@)
 961  */
 962 DWORD WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 963 {
 964     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), FALSE );
 965 }
 966
 967
 968 /***********************************************************************
 969  *              GetClassNameA (USER32.@)
 970  */
 971 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
 972 {
 973     WCHAR tmpbuf[MAX_ATOM_LEN + 1];
 974     DWORD len;
 975
 976     if (count <= 0) return 0;
 977     if (!GetClassNameW( hwnd, tmpbuf, sizeof(tmpbuf)/sizeof(WCHAR) )) return 0;
 978     RtlUnicodeToMultiByteN( buffer, count - 1, &len, tmpbuf, strlenW(tmpbuf) * sizeof(WCHAR) );
 979     buffer[len] = 0;
 980     return len;
 981 }
 982
 983
 984 /***********************************************************************
 985  *              GetClassNameW (USER32.@)
 986  */
 987 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
 988 {
 989     CLASS *class;
 990     INT ret;
 991
 992     TRACE("%p %p %d\n", hwnd, buffer, count);
 993
 994     if (count <= 0) return 0;
 995
 996     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 997
 998     if (class == CLASS_OTHER_PROCESS)
 999     {
1000         WCHAR tmpbuf[MAX_ATOM_LEN + 1];
1001
1002         ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), tmpbuf, MAX_ATOM_LEN + 1 );
1003         if (ret)
1004         {
1005             ret = min(count - 1, ret);
1006             memcpy(buffer, tmpbuf, ret * sizeof(WCHAR));
1007             buffer[ret] = 0;
1008         }
1009     }
1010     else
1011     {
1012         lstrcpynW( buffer, class->name, count );
1013         release_class_ptr( class );
1014         ret = strlenW( buffer );
1015     }
1016     return ret;
1017 }
1018
1019
1020 /***********************************************************************
1021  *              RealGetWindowClassA (USER32.@)
1022  */
1023 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
1024 {
1025     return GetClassNameA( hwnd, buffer, count );
1026 }
1027
1028
1029 /***********************************************************************
1030  *              RealGetWindowClassW (USER32.@)
1031  */
1032 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1033 {
1034     return GetClassNameW( hwnd, buffer, count );
1035 }
1036
1037
1038 /***********************************************************************
1039  *              GetClassInfoA (USER32.@)
1040  */
1041 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1042 {
1043     WNDCLASSEXA wcex;
1044     UINT ret = GetClassInfoExA( hInstance, name, &wcex );
1045
1046     if (ret)
1047     {
1048         wc->style         = wcex.style;
1049         wc->lpfnWndProc   = wcex.lpfnWndProc;
1050         wc->cbClsExtra    = wcex.cbClsExtra;
1051         wc->cbWndExtra    = wcex.cbWndExtra;
1052         wc->hInstance     = wcex.hInstance;
1053         wc->hIcon         = wcex.hIcon;
1054         wc->hCursor       = wcex.hCursor;
1055         wc->hbrBackground = wcex.hbrBackground;
1056         wc->lpszMenuName  = wcex.lpszMenuName;
1057         wc->lpszClassName = wcex.lpszClassName;
1058     }
1059     return ret;
1060 }
1061
1062
1063 /***********************************************************************
1064  *              GetClassInfoW (USER32.@)
1065  */
1066 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1067 {
1068     WNDCLASSEXW wcex;
1069     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1070
1071     if (ret)
1072     {
1073         wc->style         = wcex.style;
1074         wc->lpfnWndProc   = wcex.lpfnWndProc;
1075         wc->cbClsExtra    = wcex.cbClsExtra;
1076         wc->cbWndExtra    = wcex.cbWndExtra;
1077         wc->hInstance     = wcex.hInstance;
1078         wc->hIcon         = wcex.hIcon;
1079         wc->hCursor       = wcex.hCursor;
1080         wc->hbrBackground = wcex.hbrBackground;
1081         wc->lpszMenuName  = wcex.lpszMenuName;
1082         wc->lpszClassName = wcex.lpszClassName;
1083     }
1084     return ret;
1085 }
1086
1087
1088 /***********************************************************************
1089  *              GetClassInfoExA (USER32.@)
1090  */
1091 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1092 {
1093     ATOM atom;
1094     CLASS *classPtr;
1095
1096     TRACE("%p %s %p\n", hInstance, debugstr_a(name), wc);
1097
1098     if (!hInstance) hInstance = user32_module;
1099
1100     if (!IS_INTRESOURCE(name))
1101     {
1102         WCHAR nameW[MAX_ATOM_LEN + 1];
1103         if (!MultiByteToWideChar( CP_ACP, 0, name, -1, nameW, sizeof(nameW)/sizeof(WCHAR) ))
1104             return FALSE;
1105         classPtr = CLASS_FindClass( nameW, hInstance );
1106     }
1107     else classPtr = CLASS_FindClass( (LPCWSTR)name, hInstance );
1108
1109     if (!classPtr)
1110     {
1111         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1112         return FALSE;
1113     }
1114     wc->style         = classPtr->style;
1115     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, FALSE );
1116     wc->cbClsExtra    = classPtr->cbClsExtra;
1117     wc->cbWndExtra    = classPtr->cbWndExtra;
1118     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1119     wc->hIcon         = (HICON)classPtr->hIcon;
1120     wc->hIconSm       = (HICON)classPtr->hIconSm;
1121     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1122     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1123     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1124     wc->lpszClassName = name;
1125     atom = classPtr->atomName;
1126     release_class_ptr( classPtr );
1127
1128     /* We must return the atom of the class here instead of just TRUE. */
1129     return atom;
1130 }
1131
1132
1133 /***********************************************************************
1134  *              GetClassInfoExW (USER32.@)
1135  */
1136 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1137 {
1138     ATOM atom;
1139     CLASS *classPtr;
1140
1141     TRACE("%p %s %p\n", hInstance, debugstr_w(name), wc);
1142
1143     if (!hInstance) hInstance = user32_module;
1144
1145     if (!(classPtr = CLASS_FindClass( name, hInstance )))
1146     {
1147         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1148         return FALSE;
1149     }
1150     wc->style         = classPtr->style;
1151     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, TRUE );
1152     wc->cbClsExtra    = classPtr->cbClsExtra;
1153     wc->cbWndExtra    = classPtr->cbWndExtra;
1154     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1155     wc->hIcon         = (HICON)classPtr->hIcon;
1156     wc->hIconSm       = (HICON)classPtr->hIconSm;
1157     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1158     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1159     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1160     wc->lpszClassName = name;
1161     atom = classPtr->atomName;
1162     release_class_ptr( classPtr );
1163
1164     /* We must return the atom of the class here instead of just TRUE. */
1165     return atom;
1166 }
1167
1168
1169 #if 0  /* toolhelp is in kernel, so this cannot work */
1170
1171 /***********************************************************************
1172  *              ClassFirst (TOOLHELP.69)
1173  */
1174 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1175 {
1176     TRACE("%p\n",pClassEntry);
1177     pClassEntry->wNext = 1;
1178     return ClassNext16( pClassEntry );
1179 }
1180
1181
1182 /***********************************************************************
1183  *              ClassNext (TOOLHELP.70)
1184  */
1185 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1186 {
1187     int i;
1188     CLASS *class = firstClass;
1189
1190     TRACE("%p\n",pClassEntry);
1191
1192     if (!pClassEntry->wNext) return FALSE;
1193     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1194     if (!class)
1195     {
1196         pClassEntry->wNext = 0;
1197         return FALSE;
1198     }
1199     pClassEntry->hInst = class->hInstance;
1200     pClassEntry->wNext++;
1201     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1202                           sizeof(pClassEntry->szClassName) );
1203     return TRUE;
1204 }
1205 #endif
1206
1207 /* 64bit versions */
1208
1209 #ifdef GetClassLongPtrA
1210 #undef GetClassLongPtrA
1211 #endif
1212
1213 #ifdef GetClassLongPtrW
1214 #undef GetClassLongPtrW
1215 #endif
1216
1217 #ifdef SetClassLongPtrA
1218 #undef SetClassLongPtrA
1219 #endif
1220
1221 #ifdef SetClassLongPtrW
1222 #undef SetClassLongPtrW
1223 #endif
1224
1225 /***********************************************************************
1226  *              GetClassLongPtrA (USER32.@)
1227  */
1228 ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
1229 {
1230     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), FALSE );
1231 }
1232
1233 /***********************************************************************
1234  *              GetClassLongPtrW (USER32.@)
1235  */
1236 ULONG_PTR WINAPI GetClassLongPtrW( HWND hwnd, INT offset )
1237 {
1238     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), TRUE );
1239 }
1240
1241 /***********************************************************************
1242  *              SetClassLongPtrW (USER32.@)
1243  */
1244 ULONG_PTR WINAPI SetClassLongPtrW( HWND hwnd, INT offset, LONG_PTR newval )
1245 {
1246     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), TRUE );
1247 }
1248
1249 /***********************************************************************
1250  *              SetClassLongPtrA (USER32.@)
1251  */
1252 ULONG_PTR WINAPI SetClassLongPtrA( HWND hwnd, INT offset, LONG_PTR newval )
1253 {
1254     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), FALSE );
1255 }