dlls/user32/focus.c

   1 /*
   2  * Focus and activation functions
   3  *
   4  * Copyright 1993 David Metcalfe
   5  * Copyright 1995 Alex Korobka
   6  * Copyright 1994, 2002 Alexandre Julliard
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdarg.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winuser.h"
  31 #include "win.h"
  32 #include "user_private.h"
  33 #include "wine/server.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(win);
  37
  38
  39 /*****************************************************************
  40  *              set_focus_window
  41  *
  42  * Change the focus window, sending the WM_SETFOCUS and WM_KILLFOCUS messages
  43  */
  44 static HWND set_focus_window( HWND hwnd )
  45 {
  46     HWND previous = 0;
  47     BOOL ret;
  48
  49     SERVER_START_REQ( set_focus_window )
  50     {
  51         req->handle = wine_server_user_handle( hwnd );
  52         if ((ret = !wine_server_call_err( req )))
  53             previous = wine_server_ptr_handle( reply->previous );
  54     }
  55     SERVER_END_REQ;
  56     if (!ret) return 0;
  57     if (previous == hwnd) return previous;
  58
  59     if (previous)
  60     {
  61         SendMessageW( previous, WM_KILLFOCUS, (WPARAM)hwnd, 0 );
  62         if (hwnd != GetFocus()) return previous;  /* changed by the message */
  63     }
  64     if (IsWindow(hwnd))
  65     {
  66         USER_Driver->pSetFocus(hwnd);
  67         SendMessageW( hwnd, WM_SETFOCUS, (WPARAM)previous, 0 );
  68     }
  69     return previous;
  70 }
  71
  72
  73 /*******************************************************************
  74  *              set_active_window
  75  */
  76 static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus )
  77 {
  78     HWND previous = GetActiveWindow();
  79     BOOL ret;
  80     DWORD old_thread, new_thread;
  81     CBTACTIVATESTRUCT cbt;
  82
  83     if (previous == hwnd)
  84     {
  85         if (prev) *prev = hwnd;
  86         return TRUE;
  87     }
  88
  89     /* call CBT hook chain */
  90     cbt.fMouse     = mouse;
  91     cbt.hWndActive = previous;
  92     if (HOOK_CallHooks( WH_CBT, HCBT_ACTIVATE, (WPARAM)hwnd, (LPARAM)&cbt, TRUE )) return FALSE;
  93
  94     if (IsWindow(previous))
  95     {
  96         SendMessageW( previous, WM_NCACTIVATE, FALSE, (LPARAM)hwnd );
  97         SendMessageW( previous, WM_ACTIVATE,
  98                       MAKEWPARAM( WA_INACTIVE, IsIconic(previous) ), (LPARAM)hwnd );
  99     }
 100
 101     SERVER_START_REQ( set_active_window )
 102     {
 103         req->handle = wine_server_user_handle( hwnd );
 104         if ((ret = !wine_server_call_err( req )))
 105             previous = wine_server_ptr_handle( reply->previous );
 106     }
 107     SERVER_END_REQ;
 108     if (!ret) return FALSE;
 109     if (prev) *prev = previous;
 110     if (previous == hwnd) return TRUE;
 111
 112     if (hwnd)
 113     {
 114         /* send palette messages */
 115         if (SendMessageW( hwnd, WM_QUERYNEWPALETTE, 0, 0 ))
 116             SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTEISCHANGING, (WPARAM)hwnd, 0,
 117                                  SMTO_ABORTIFHUNG, 2000, NULL );
 118         if (!IsWindow(hwnd)) return FALSE;
 119     }
 120
 121     old_thread = previous ? GetWindowThreadProcessId( previous, NULL ) : 0;
 122     new_thread = hwnd ? GetWindowThreadProcessId( hwnd, NULL ) : 0;
 123
 124     if (old_thread != new_thread)
 125     {
 126         HWND *list, *phwnd;
 127
 128         if ((list = WIN_ListChildren( GetDesktopWindow() )))
 129         {
 130             if (old_thread)
 131             {
 132                 for (phwnd = list; *phwnd; phwnd++)
 133                 {
 134                     if (GetWindowThreadProcessId( *phwnd, NULL ) == old_thread)
 135                         SendMessageW( *phwnd, WM_ACTIVATEAPP, 0, new_thread );
 136                 }
 137             }
 138             if (new_thread)
 139             {
 140                 for (phwnd = list; *phwnd; phwnd++)
 141                 {
 142                     if (GetWindowThreadProcessId( *phwnd, NULL ) == new_thread)
 143                         SendMessageW( *phwnd, WM_ACTIVATEAPP, 1, old_thread );
 144                 }
 145             }
 146             HeapFree( GetProcessHeap(), 0, list );
 147         }
 148     }
 149
 150     if (IsWindow(hwnd))
 151     {
 152         SendMessageW( hwnd, WM_NCACTIVATE, (hwnd == GetForegroundWindow()), (LPARAM)previous );
 153         SendMessageW( hwnd, WM_ACTIVATE,
 154                       MAKEWPARAM( mouse ? WA_CLICKACTIVE : WA_ACTIVE, IsIconic(hwnd) ),
 155                       (LPARAM)previous );
 156     }
 157
 158     /* now change focus if necessary */
 159     if (focus)
 160     {
 161         GUITHREADINFO info;
 162
 163         info.cbSize = sizeof(info);
 164         GetGUIThreadInfo( GetCurrentThreadId(), &info );
 165         /* Do not change focus if the window is no more active */
 166         if (hwnd == info.hwndActive)
 167         {
 168             if (!info.hwndFocus || !hwnd || GetAncestor( info.hwndFocus, GA_ROOT ) != hwnd)
 169                 set_focus_window( hwnd );
 170         }
 171     }
 172
 173     return TRUE;
 174 }
 175
 176
 177 /*******************************************************************
 178  *              set_foreground_window
 179  */
 180 static BOOL set_foreground_window( HWND hwnd, BOOL mouse )
 181 {
 182     BOOL ret, send_msg_old = FALSE, send_msg_new = FALSE;
 183     HWND previous = 0;
 184
 185     SERVER_START_REQ( set_foreground_window )
 186     {
 187         req->handle = wine_server_user_handle( hwnd );
 188         if ((ret = !wine_server_call_err( req )))
 189         {
 190             previous = wine_server_ptr_handle( reply->previous );
 191             send_msg_old = reply->send_msg_old;
 192             send_msg_new = reply->send_msg_new;
 193         }
 194     }
 195     SERVER_END_REQ;
 196
 197     if (ret && previous != hwnd)
 198     {
 199         if (send_msg_old)  /* old window belongs to other thread */
 200             SendNotifyMessageW( previous, WM_WINE_SETACTIVEWINDOW, 0, 0 );
 201         else if (send_msg_new)  /* old window belongs to us but new one to other thread */
 202             ret = set_active_window( 0, NULL, mouse, TRUE );
 203
 204         if (send_msg_new)  /* new window belongs to other thread */
 205             SendNotifyMessageW( hwnd, WM_WINE_SETACTIVEWINDOW, (WPARAM)hwnd, 0 );
 206         else  /* new window belongs to us */
 207             ret = set_active_window( hwnd, NULL, mouse, TRUE );
 208     }
 209     return ret;
 210 }
 211
 212
 213 /*******************************************************************
 214  *              FOCUS_MouseActivate
 215  *
 216  * Activate a window as a result of a mouse click
 217  */
 218 BOOL FOCUS_MouseActivate( HWND hwnd )
 219 {
 220     return set_foreground_window( hwnd, TRUE );
 221 }
 222
 223
 224 /*******************************************************************
 225  *              SetActiveWindow (USER32.@)
 226  */
 227 HWND WINAPI SetActiveWindow( HWND hwnd )
 228 {
 229     HWND prev;
 230
 231     TRACE( "%p\n", hwnd );
 232
 233     if (hwnd)
 234     {
 235         LONG style = GetWindowLongW( hwnd, GWL_STYLE );
 236
 237         if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD)
 238             return GetActiveWindow();  /* Windows doesn't seem to return an error here */
 239
 240         hwnd = WIN_GetFullHandle( hwnd );
 241     }
 242
 243     if (!set_active_window( hwnd, &prev, FALSE, TRUE )) return 0;
 244     return prev;
 245 }
 246
 247
 248 /*****************************************************************
 249  *              SetFocus  (USER32.@)
 250  */
 251 HWND WINAPI SetFocus( HWND hwnd )
 252 {
 253     HWND hwndTop = hwnd;
 254     HWND previous = GetFocus();
 255
 256     TRACE( "%p prev %p\n", hwnd, previous );
 257
 258     if (hwnd)
 259     {
 260         /* Check if we can set the focus to this window */
 261         hwnd = WIN_GetFullHandle( hwnd );
 262         if (hwnd == previous) return previous;  /* nothing to do */
 263         for (;;)
 264         {
 265             HWND parent;
 266             LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
 267             if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
 268             parent = GetAncestor( hwndTop, GA_PARENT );
 269             if (!parent || parent == GetDesktopWindow()) break;
 270             if (parent == get_hwnd_message_parent()) return 0;
 271             hwndTop = parent;
 272         }
 273
 274         /* call hooks */
 275         if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, (WPARAM)hwnd, (LPARAM)previous, TRUE )) return 0;
 276
 277         /* activate hwndTop if needed. */
 278         if (hwndTop != GetActiveWindow())
 279         {
 280             if (!set_active_window( hwndTop, NULL, FALSE, FALSE )) return 0;
 281             if (!IsWindow( hwnd )) return 0;  /* Abort if window destroyed */
 282
 283             /* Do not change focus if the window is no longer active */
 284             if (hwndTop != GetActiveWindow()) return 0;
 285         }
 286     }
 287     else /* NULL hwnd passed in */
 288     {
 289         if (!previous) return 0;  /* nothing to do */
 290         if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)previous, TRUE )) return 0;
 291     }
 292
 293     /* change focus and send messages */
 294     return set_focus_window( hwnd );
 295 }
 296
 297
 298 /*******************************************************************
 299  *              SetForegroundWindow  (USER32.@)
 300  */
 301 BOOL WINAPI SetForegroundWindow( HWND hwnd )
 302 {
 303     TRACE( "%p\n", hwnd );
 304
 305     hwnd = WIN_GetFullHandle( hwnd );
 306     return set_foreground_window( hwnd, FALSE );
 307 }
 308
 309
 310 /*******************************************************************
 311  *              GetActiveWindow  (USER32.@)
 312  */
 313 HWND WINAPI GetActiveWindow(void)
 314 {
 315     HWND ret = 0;
 316
 317     SERVER_START_REQ( get_thread_input )
 318     {
 319         req->tid = GetCurrentThreadId();
 320         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->active );
 321     }
 322     SERVER_END_REQ;
 323     return ret;
 324 }
 325
 326
 327 /*****************************************************************
 328  *              GetFocus  (USER32.@)
 329  */
 330 HWND WINAPI GetFocus(void)
 331 {
 332     HWND ret = 0;
 333
 334     SERVER_START_REQ( get_thread_input )
 335     {
 336         req->tid = GetCurrentThreadId();
 337         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->focus );
 338     }
 339     SERVER_END_REQ;
 340     return ret;
 341 }
 342
 343
 344 /*******************************************************************
 345  *              GetForegroundWindow  (USER32.@)
 346  */
 347 HWND WINAPI GetForegroundWindow(void)
 348 {
 349     HWND ret = 0;
 350
 351     SERVER_START_REQ( get_thread_input )
 352     {
 353         req->tid = 0;
 354         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->foreground );
 355     }
 356     SERVER_END_REQ;
 357     return ret;
 358 }
 359
 360
 361 /***********************************************************************
 362 *               SetShellWindowEx (USER32.@)
 363 * hwndShell =    Progman[Program Manager]
 364 *                |-> SHELLDLL_DefView
 365 * hwndListView = |   |-> SysListView32
 366 *                |   |   |-> tooltips_class32
 367 *                |   |
 368 *                |   |-> SysHeader32
 369 *                |
 370 *                |-> ProxyTarget
 371 */
 372 BOOL WINAPI SetShellWindowEx(HWND hwndShell, HWND hwndListView)
 373 {
 374     BOOL ret;
 375
 376     if (GetShellWindow())
 377         return FALSE;
 378
 379     if (GetWindowLongW(hwndShell, GWL_EXSTYLE) & WS_EX_TOPMOST)
 380         return FALSE;
 381
 382     if (hwndListView != hwndShell)
 383         if (GetWindowLongW(hwndListView, GWL_EXSTYLE) & WS_EX_TOPMOST)
 384             return FALSE;
 385
 386     if (hwndListView && hwndListView!=hwndShell)
 387         SetWindowPos(hwndListView, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE);
 388
 389     SetWindowPos(hwndShell, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE);
 390
 391     SERVER_START_REQ(set_global_windows)
 392     {
 393         req->flags          = SET_GLOBAL_SHELL_WINDOWS;
 394         req->shell_window   = wine_server_user_handle( hwndShell );
 395         req->shell_listview = wine_server_user_handle( hwndListView );
 396         ret = !wine_server_call_err(req);
 397     }
 398     SERVER_END_REQ;
 399
 400     return ret;
 401 }
 402
 403
 404 /*******************************************************************
 405 *               SetShellWindow (USER32.@)
 406 */
 407 BOOL WINAPI SetShellWindow(HWND hwndShell)
 408 {
 409     return SetShellWindowEx(hwndShell, hwndShell);
 410 }
 411
 412
 413 /*******************************************************************
 414 *               GetShellWindow (USER32.@)
 415 */
 416 HWND WINAPI GetShellWindow(void)
 417 {
 418     HWND hwndShell = 0;
 419
 420     SERVER_START_REQ(set_global_windows)
 421     {
 422         req->flags = 0;
 423         if (!wine_server_call_err(req))
 424             hwndShell = wine_server_ptr_handle( reply->old_shell_window );
 425     }
 426     SERVER_END_REQ;
 427
 428     return hwndShell;
 429 }
 430
 431
 432 /***********************************************************************
 433  *              SetProgmanWindow (USER32.@)
 434  */
 435 HWND WINAPI SetProgmanWindow ( HWND hwnd )
 436 {
 437     SERVER_START_REQ(set_global_windows)
 438     {
 439         req->flags          = SET_GLOBAL_PROGMAN_WINDOW;
 440         req->progman_window = wine_server_user_handle( hwnd );
 441         if (wine_server_call_err( req )) hwnd = 0;
 442     }
 443     SERVER_END_REQ;
 444     return hwnd;
 445 }
 446
 447
 448 /***********************************************************************
 449  *              GetProgmanWindow (USER32.@)
 450  */
 451 HWND WINAPI GetProgmanWindow(void)
 452 {
 453     HWND ret = 0;
 454
 455     SERVER_START_REQ(set_global_windows)
 456     {
 457         req->flags = 0;
 458         if (!wine_server_call_err(req))
 459             ret = wine_server_ptr_handle( reply->old_progman_window );
 460     }
 461     SERVER_END_REQ;
 462     return ret;
 463 }
 464
 465
 466 /***********************************************************************
 467  *              SetTaskmanWindow (USER32.@)
 468  * NOTES
 469  *   hwnd = MSTaskSwWClass
 470  *          |-> SysTabControl32
 471  */
 472 HWND WINAPI SetTaskmanWindow ( HWND hwnd )
 473 {
 474     SERVER_START_REQ(set_global_windows)
 475     {
 476         req->flags          = SET_GLOBAL_TASKMAN_WINDOW;
 477         req->taskman_window = wine_server_user_handle( hwnd );
 478         if (wine_server_call_err( req )) hwnd = 0;
 479     }
 480     SERVER_END_REQ;
 481     return hwnd;
 482 }
 483
 484 /***********************************************************************
 485  *              GetTaskmanWindow (USER32.@)
 486  */
 487 HWND WINAPI GetTaskmanWindow(void)
 488 {
 489     HWND ret = 0;
 490
 491     SERVER_START_REQ(set_global_windows)
 492     {
 493         req->flags = 0;
 494         if (!wine_server_call_err(req))
 495             ret = wine_server_ptr_handle( reply->old_taskman_window );
 496     }
 497     SERVER_END_REQ;
 498     return ret;
 499 }