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         GetGUIThreadInfo( GetCurrentThreadId(), &info );
 164         /* Do not change focus if the window is no more active */
 165         if (hwnd == info.hwndActive)
 166         {
 167             if (!info.hwndFocus || !hwnd || GetAncestor( info.hwndFocus, GA_ROOT ) != hwnd)
 168                 set_focus_window( hwnd );
 169         }
 170     }
 171
 172     return TRUE;
 173 }
 174
 175
 176 /*******************************************************************
 177  *              set_foreground_window
 178  */
 179 static BOOL set_foreground_window( HWND hwnd, BOOL mouse )
 180 {
 181     BOOL ret, send_msg_old = FALSE, send_msg_new = FALSE;
 182     HWND previous = 0;
 183
 184     SERVER_START_REQ( set_foreground_window )
 185     {
 186         req->handle = wine_server_user_handle( hwnd );
 187         if ((ret = !wine_server_call_err( req )))
 188         {
 189             previous = wine_server_ptr_handle( reply->previous );
 190             send_msg_old = reply->send_msg_old;
 191             send_msg_new = reply->send_msg_new;
 192         }
 193     }
 194     SERVER_END_REQ;
 195
 196     if (ret)
 197     {
 198         if (send_msg_old)  /* old window belongs to other thread */
 199             SendNotifyMessageW( previous, WM_WINE_SETACTIVEWINDOW, 0, 0 );
 200         else if (send_msg_new)  /* old window belongs to us but new one to other thread */
 201             ret = set_active_window( 0, NULL, mouse, TRUE );
 202
 203         if (send_msg_new)  /* new window belongs to other thread */
 204             SendNotifyMessageW( hwnd, WM_WINE_SETACTIVEWINDOW, (WPARAM)hwnd, 0 );
 205         else  /* new window belongs to us */
 206             ret = set_active_window( hwnd, NULL, mouse, TRUE );
 207     }
 208     return ret;
 209 }
 210
 211
 212 /*******************************************************************
 213  *              FOCUS_MouseActivate
 214  *
 215  * Activate a window as a result of a mouse click
 216  */
 217 BOOL FOCUS_MouseActivate( HWND hwnd )
 218 {
 219     return set_foreground_window( hwnd, TRUE );
 220 }
 221
 222
 223 /*******************************************************************
 224  *              SetActiveWindow (USER32.@)
 225  */
 226 HWND WINAPI SetActiveWindow( HWND hwnd )
 227 {
 228     HWND prev;
 229
 230     TRACE( "%p\n", hwnd );
 231
 232     if (hwnd)
 233     {
 234         LONG style = GetWindowLongW( hwnd, GWL_STYLE );
 235
 236         if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD)
 237             return GetActiveWindow();  /* Windows doesn't seem to return an error here */
 238
 239         hwnd = WIN_GetFullHandle( hwnd );
 240     }
 241
 242     if (!set_active_window( hwnd, &prev, FALSE, TRUE )) return 0;
 243     return prev;
 244 }
 245
 246
 247 /*****************************************************************
 248  *              SetFocus  (USER32.@)
 249  */
 250 HWND WINAPI SetFocus( HWND hwnd )
 251 {
 252     HWND hwndTop = hwnd;
 253     HWND previous = GetFocus();
 254
 255     TRACE( "%p prev %p\n", hwnd, previous );
 256
 257     if (hwnd)
 258     {
 259         /* Check if we can set the focus to this window */
 260         hwnd = WIN_GetFullHandle( hwnd );
 261         if (hwnd == previous) return previous;  /* nothing to do */
 262         for (;;)
 263         {
 264             HWND parent;
 265             LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
 266             if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
 267             parent = GetAncestor( hwndTop, GA_PARENT );
 268             if (!parent || parent == GetDesktopWindow()) break;
 269             if (parent == get_hwnd_message_parent()) return 0;
 270             hwndTop = parent;
 271         }
 272
 273         /* call hooks */
 274         if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, (WPARAM)hwnd, (LPARAM)previous, TRUE )) return 0;
 275
 276         /* activate hwndTop if needed. */
 277         if (hwndTop != GetActiveWindow())
 278         {
 279             if (!set_active_window( hwndTop, NULL, FALSE, FALSE )) return 0;
 280             if (!IsWindow( hwnd )) return 0;  /* Abort if window destroyed */
 281
 282             /* Do not change focus if the window is no longer active */
 283             if (hwndTop != GetActiveWindow()) return 0;
 284         }
 285     }
 286     else /* NULL hwnd passed in */
 287     {
 288         if (!previous) return 0;  /* nothing to do */
 289         if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)previous, TRUE )) return 0;
 290     }
 291
 292     /* change focus and send messages */
 293     return set_focus_window( hwnd );
 294 }
 295
 296
 297 /*******************************************************************
 298  *              SetForegroundWindow  (USER32.@)
 299  */
 300 BOOL WINAPI SetForegroundWindow( HWND hwnd )
 301 {
 302     TRACE( "%p\n", hwnd );
 303
 304     hwnd = WIN_GetFullHandle( hwnd );
 305     return set_foreground_window( hwnd, FALSE );
 306 }
 307
 308
 309 /*******************************************************************
 310  *              GetActiveWindow  (USER32.@)
 311  */
 312 HWND WINAPI GetActiveWindow(void)
 313 {
 314     HWND ret = 0;
 315
 316     SERVER_START_REQ( get_thread_input )
 317     {
 318         req->tid = GetCurrentThreadId();
 319         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->active );
 320     }
 321     SERVER_END_REQ;
 322     return ret;
 323 }
 324
 325
 326 /*****************************************************************
 327  *              GetFocus  (USER32.@)
 328  */
 329 HWND WINAPI GetFocus(void)
 330 {
 331     HWND ret = 0;
 332
 333     SERVER_START_REQ( get_thread_input )
 334     {
 335         req->tid = GetCurrentThreadId();
 336         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->focus );
 337     }
 338     SERVER_END_REQ;
 339     return ret;
 340 }
 341
 342
 343 /*******************************************************************
 344  *              GetForegroundWindow  (USER32.@)
 345  */
 346 HWND WINAPI GetForegroundWindow(void)
 347 {
 348     HWND ret = 0;
 349
 350     SERVER_START_REQ( get_thread_input )
 351     {
 352         req->tid = 0;
 353         if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->foreground );
 354     }
 355     SERVER_END_REQ;
 356     return ret;
 357 }
 358
 359
 360 /***********************************************************************
 361 *               SetShellWindowEx (USER32.@)
 362 * hwndShell =    Progman[Program Manager]
 363 *                |-> SHELLDLL_DefView
 364 * hwndListView = |   |-> SysListView32
 365 *                |   |   |-> tooltips_class32
 366 *                |   |
 367 *                |   |-> SysHeader32
 368 *                |
 369 *                |-> ProxyTarget
 370 */
 371 BOOL WINAPI SetShellWindowEx(HWND hwndShell, HWND hwndListView)
 372 {
 373     BOOL ret;
 374
 375     if (GetShellWindow())
 376         return FALSE;
 377
 378     if (GetWindowLongW(hwndShell, GWL_EXSTYLE) & WS_EX_TOPMOST)
 379         return FALSE;
 380
 381     if (hwndListView != hwndShell)
 382         if (GetWindowLongW(hwndListView, GWL_EXSTYLE) & WS_EX_TOPMOST)
 383             return FALSE;
 384
 385     if (hwndListView && hwndListView!=hwndShell)
 386         SetWindowPos(hwndListView, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE);
 387
 388     SetWindowPos(hwndShell, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE);
 389
 390     SERVER_START_REQ(set_global_windows)
 391     {
 392         req->flags          = SET_GLOBAL_SHELL_WINDOWS;
 393         req->shell_window   = wine_server_user_handle( hwndShell );
 394         req->shell_listview = wine_server_user_handle( hwndListView );
 395         ret = !wine_server_call_err(req);
 396     }
 397     SERVER_END_REQ;
 398
 399     return ret;
 400 }
 401
 402
 403 /*******************************************************************
 404 *               SetShellWindow (USER32.@)
 405 */
 406 BOOL WINAPI SetShellWindow(HWND hwndShell)
 407 {
 408     return SetShellWindowEx(hwndShell, hwndShell);
 409 }
 410
 411
 412 /*******************************************************************
 413 *               GetShellWindow (USER32.@)
 414 */
 415 HWND WINAPI GetShellWindow(void)
 416 {
 417     HWND hwndShell = 0;
 418
 419     SERVER_START_REQ(set_global_windows)
 420     {
 421         req->flags = 0;
 422         if (!wine_server_call_err(req))
 423             hwndShell = wine_server_ptr_handle( reply->old_shell_window );
 424     }
 425     SERVER_END_REQ;
 426
 427     return hwndShell;
 428 }
 429
 430
 431 /***********************************************************************
 432  *              SetProgmanWindow (USER32.@)
 433  */
 434 HWND WINAPI SetProgmanWindow ( HWND hwnd )
 435 {
 436     SERVER_START_REQ(set_global_windows)
 437     {
 438         req->flags          = SET_GLOBAL_PROGMAN_WINDOW;
 439         req->progman_window = wine_server_user_handle( hwnd );
 440         if (wine_server_call_err( req )) hwnd = 0;
 441     }
 442     SERVER_END_REQ;
 443     return hwnd;
 444 }
 445
 446
 447 /***********************************************************************
 448  *              GetProgmanWindow (USER32.@)
 449  */
 450 HWND WINAPI GetProgmanWindow(void)
 451 {
 452     HWND ret = 0;
 453
 454     SERVER_START_REQ(set_global_windows)
 455     {
 456         req->flags = 0;
 457         if (!wine_server_call_err(req))
 458             ret = wine_server_ptr_handle( reply->old_progman_window );
 459     }
 460     SERVER_END_REQ;
 461     return ret;
 462 }
 463
 464
 465 /***********************************************************************
 466  *              SetTaskmanWindow (USER32.@)
 467  * NOTES
 468  *   hwnd = MSTaskSwWClass
 469  *          |-> SysTabControl32
 470  */
 471 HWND WINAPI SetTaskmanWindow ( HWND hwnd )
 472 {
 473     SERVER_START_REQ(set_global_windows)
 474     {
 475         req->flags          = SET_GLOBAL_TASKMAN_WINDOW;
 476         req->taskman_window = wine_server_user_handle( hwnd );
 477         if (wine_server_call_err( req )) hwnd = 0;
 478     }
 479     SERVER_END_REQ;
 480     return hwnd;
 481 }
 482
 483 /***********************************************************************
 484  *              GetTaskmanWindow (USER32.@)
 485  */
 486 HWND WINAPI GetTaskmanWindow(void)
 487 {
 488     HWND ret = 0;
 489
 490     SERVER_START_REQ(set_global_windows)
 491     {
 492         req->flags = 0;
 493         if (!wine_server_call_err(req))
 494             ret = wine_server_ptr_handle( reply->old_taskman_window );
 495     }
 496     SERVER_END_REQ;
 497     return ret;
 498 }