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