Pileus Git - ~andy/gtk/blob - gdk/x11/gdkdevice-xi2.c

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21
  22 #include "gdkx11device-xi2.h"
  23 #include "gdkdeviceprivate.h"
  24
  25 #include "gdkintl.h"
  26 #include "gdkasync.h"
  27 #include "gdkprivate-x11.h"
  28
  29 struct _GdkX11DeviceXI2
  30 {
  31   GdkDevice parent_instance;
  32
  33   gint device_id;
  34 };
  35
  36 struct _GdkX11DeviceXI2Class
  37 {
  38   GdkDeviceClass parent_class;
  39 };
  40
  41 static void gdk_x11_device_xi2_get_property (GObject      *object,
  42                                              guint         prop_id,
  43                                              GValue       *value,
  44                                              GParamSpec   *pspec);
  45 static void gdk_x11_device_xi2_set_property (GObject      *object,
  46                                              guint         prop_id,
  47                                              const GValue *value,
  48                                              GParamSpec   *pspec);
  49
  50 static void gdk_x11_device_xi2_get_state (GdkDevice       *device,
  51                                           GdkWindow       *window,
  52                                           gdouble         *axes,
  53                                           GdkModifierType *mask);
  54 static void gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
  55                                                   GdkWindow *window,
  56                                                   GdkCursor *cursor);
  57 static void gdk_x11_device_xi2_warp (GdkDevice *device,
  58                                      GdkScreen *screen,
  59                                      gint       x,
  60                                      gint       y);
  61 static gboolean gdk_x11_device_xi2_query_state (GdkDevice        *device,
  62                                                 GdkWindow        *window,
  63                                                 GdkWindow       **root_window,
  64                                                 GdkWindow       **child_window,
  65                                                 gint             *root_x,
  66                                                 gint             *root_y,
  67                                                 gint             *win_x,
  68                                                 gint             *win_y,
  69                                                 GdkModifierType  *mask);
  70
  71 static GdkGrabStatus gdk_x11_device_xi2_grab   (GdkDevice     *device,
  72                                                 GdkWindow     *window,
  73                                                 gboolean       owner_events,
  74                                                 GdkEventMask   event_mask,
  75                                                 GdkWindow     *confine_to,
  76                                                 GdkCursor     *cursor,
  77                                                 guint32        time_);
  78 static void          gdk_x11_device_xi2_ungrab (GdkDevice     *device,
  79                                                 guint32        time_);
  80
  81 static GdkWindow * gdk_x11_device_xi2_window_at_position (GdkDevice       *device,
  82                                                           gint            *win_x,
  83                                                           gint            *win_y,
  84                                                           GdkModifierType *mask,
  85                                                           gboolean         get_toplevel);
  86 static void  gdk_x11_device_xi2_select_window_events (GdkDevice    *device,
  87                                                       GdkWindow    *window,
  88                                                       GdkEventMask  event_mask);
  89
  90
  91 G_DEFINE_TYPE (GdkX11DeviceXI2, gdk_x11_device_xi2, GDK_TYPE_DEVICE)
  92
  93 enum {
  94   PROP_0,
  95   PROP_DEVICE_ID
  96 };
  97
  98 static void
  99 gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
 100 {
 101   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 102   GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
 103
 104   object_class->get_property = gdk_x11_device_xi2_get_property;
 105   object_class->set_property = gdk_x11_device_xi2_set_property;
 106
 107   device_class->get_state = gdk_x11_device_xi2_get_state;
 108   device_class->set_window_cursor = gdk_x11_device_xi2_set_window_cursor;
 109   device_class->warp = gdk_x11_device_xi2_warp;
 110   device_class->query_state = gdk_x11_device_xi2_query_state;
 111   device_class->grab = gdk_x11_device_xi2_grab;
 112   device_class->ungrab = gdk_x11_device_xi2_ungrab;
 113   device_class->window_at_position = gdk_x11_device_xi2_window_at_position;
 114   device_class->select_window_events = gdk_x11_device_xi2_select_window_events;
 115
 116   g_object_class_install_property (object_class,
 117                                    PROP_DEVICE_ID,
 118                                    g_param_spec_int ("device-id",
 119                                                      P_("Device ID"),
 120                                                      P_("Device identifier"),
 121                                                      0, G_MAXINT, 0,
 122                                                      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 123 }
 124
 125 static void
 126 gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
 127 {
 128 }
 129
 130 static void
 131 gdk_x11_device_xi2_get_property (GObject    *object,
 132                                  guint       prop_id,
 133                                  GValue     *value,
 134                                  GParamSpec *pspec)
 135 {
 136   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
 137
 138   switch (prop_id)
 139     {
 140     case PROP_DEVICE_ID:
 141       g_value_set_int (value, device_xi2->device_id);
 142       break;
 143     default:
 144       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 145       break;
 146     }
 147 }
 148
 149 static void
 150 gdk_x11_device_xi2_set_property (GObject      *object,
 151                                  guint         prop_id,
 152                                  const GValue *value,
 153                                  GParamSpec   *pspec)
 154 {
 155   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
 156
 157   switch (prop_id)
 158     {
 159     case PROP_DEVICE_ID:
 160       device_xi2->device_id = g_value_get_int (value);
 161       break;
 162     default:
 163       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 164       break;
 165     }
 166 }
 167
 168 static void
 169 gdk_x11_device_xi2_get_state (GdkDevice       *device,
 170                               GdkWindow       *window,
 171                               gdouble         *axes,
 172                               GdkModifierType *mask)
 173 {
 174   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 175   GdkDisplay *display;
 176   XIDeviceInfo *info;
 177   gint i, j, ndevices;
 178
 179   display = gdk_device_get_display (device);
 180
 181   if (axes)
 182     {
 183       info = XIQueryDevice(GDK_DISPLAY_XDISPLAY (display),
 184                            device_xi2->device_id, &ndevices);
 185
 186       for (i = 0, j = 0; i < info->num_classes; i++)
 187         {
 188           XIAnyClassInfo *class_info = info->classes[i];
 189           GdkAxisUse use;
 190           gdouble value;
 191
 192           if (class_info->type != XIValuatorClass)
 193             continue;
 194
 195           value = ((XIValuatorClassInfo *) class_info)->value;
 196           use = _gdk_device_get_axis_use (device, j);
 197
 198           switch (use)
 199             {
 200             case GDK_AXIS_X:
 201             case GDK_AXIS_Y:
 202             case GDK_AXIS_IGNORE:
 203               if (gdk_device_get_mode (device) == GDK_MODE_WINDOW)
 204                 _gdk_device_translate_window_coord (device, window, j, value, &axes[j]);
 205               else
 206                 {
 207                   gint root_x, root_y;
 208
 209                   /* FIXME: Maybe root coords chaching should happen here */
 210                   gdk_window_get_origin (window, &root_x, &root_y);
 211                   _gdk_device_translate_screen_coord (device, window,
 212                                                       root_x, root_y,
 213                                                       j, value,
 214                                                       &axes[j]);
 215                 }
 216               break;
 217             default:
 218               _gdk_device_translate_axis (device, j, value, &axes[j]);
 219               break;
 220             }
 221
 222           j++;
 223         }
 224
 225       XIFreeDeviceInfo (info);
 226     }
 227
 228   if (mask)
 229     gdk_x11_device_xi2_query_state (device, window,
 230                                     NULL, NULL,
 231                                     NULL, NULL,
 232                                     NULL, NULL,
 233                                     mask);
 234 }
 235
 236 static void
 237 gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
 238                                       GdkWindow *window,
 239                                       GdkCursor *cursor)
 240 {
 241   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 242
 243   /* Non-master devices don't have a cursor */
 244   if (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_MASTER)
 245     return;
 246
 247   if (cursor)
 248     XIDefineCursor (GDK_WINDOW_XDISPLAY (window),
 249                     device_xi2->device_id,
 250                     GDK_WINDOW_XID (window),
 251                     gdk_x11_cursor_get_xcursor (cursor));
 252   else
 253     XIUndefineCursor (GDK_WINDOW_XDISPLAY (window),
 254                       device_xi2->device_id,
 255                       GDK_WINDOW_XID (window));
 256 }
 257
 258 static void
 259 gdk_x11_device_xi2_warp (GdkDevice *device,
 260                          GdkScreen *screen,
 261                          gint       x,
 262                          gint       y)
 263 {
 264   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 265   Window dest;
 266
 267   dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
 268
 269   XIWarpPointer (GDK_SCREEN_XDISPLAY (screen),
 270                  device_xi2->device_id,
 271                  None, dest,
 272                  0, 0, 0, 0, x, y);
 273 }
 274
 275 static gboolean
 276 gdk_x11_device_xi2_query_state (GdkDevice        *device,
 277                                 GdkWindow        *window,
 278                                 GdkWindow       **root_window,
 279                                 GdkWindow       **child_window,
 280                                 gint             *root_x,
 281                                 gint             *root_y,
 282                                 gint             *win_x,
 283                                 gint             *win_y,
 284                                 GdkModifierType  *mask)
 285 {
 286   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 287   GdkDisplay *display;
 288   GdkScreen *default_screen;
 289   Window xroot_window, xchild_window;
 290   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 291   XIButtonState button_state;
 292   XIModifierState mod_state;
 293   XIGroupState group_state;
 294
 295   if (!window || GDK_WINDOW_DESTROYED (window))
 296     return FALSE;
 297
 298   display = gdk_window_get_display (window);
 299   default_screen = gdk_display_get_default_screen (display);
 300
 301   if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
 302     {
 303       if (!XIQueryPointer (GDK_WINDOW_XDISPLAY (window),
 304                            device_xi2->device_id,
 305                            GDK_WINDOW_XID (window),
 306                            &xroot_window,
 307                            &xchild_window,
 308                            &xroot_x, &xroot_y,
 309                            &xwin_x, &xwin_y,
 310                            &button_state,
 311                            &mod_state,
 312                            &group_state))
 313         return FALSE;
 314     }
 315   else
 316     {
 317       XSetWindowAttributes attributes;
 318       Display *xdisplay;
 319       Window xwindow, w;
 320
 321       /* FIXME: untrusted clients not multidevice-safe */
 322       xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
 323       xwindow = GDK_SCREEN_XROOTWIN (default_screen);
 324
 325       w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
 326                          CopyFromParent, InputOnly, CopyFromParent,
 327                          0, &attributes);
 328       XIQueryPointer (xdisplay, device_xi2->device_id,
 329                       w,
 330                       &xroot_window,
 331                       &xchild_window,
 332                       &xroot_x, &xroot_y,
 333                       &xwin_x, &xwin_y,
 334                       &button_state,
 335                       &mod_state,
 336                       &group_state);
 337       XDestroyWindow (xdisplay, w);
 338     }
 339
 340   if (root_window)
 341     *root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
 342
 343   if (child_window)
 344     *child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
 345
 346   if (root_x)
 347     *root_x = (gint) xroot_x;
 348
 349   if (root_y)
 350     *root_y = (gint) xroot_y;
 351
 352   if (win_x)
 353     *win_x = (gint) xwin_x;
 354
 355   if (win_y)
 356     *win_y = (gint) xwin_y;
 357
 358   if (mask)
 359     *mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state);
 360
 361   return TRUE;
 362 }
 363
 364 static GdkGrabStatus
 365 gdk_x11_device_xi2_grab (GdkDevice    *device,
 366                          GdkWindow    *window,
 367                          gboolean      owner_events,
 368                          GdkEventMask  event_mask,
 369                          GdkWindow    *confine_to,
 370                          GdkCursor    *cursor,
 371                          guint32       time_)
 372 {
 373   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 374   GdkDisplay *display;
 375   XIEventMask mask;
 376   Window xwindow;
 377   Cursor xcursor;
 378   gint status;
 379
 380   display = gdk_device_get_display (device);
 381
 382   /* FIXME: confine_to is actually unused */
 383
 384   xwindow = GDK_WINDOW_XID (window);
 385
 386   if (!cursor)
 387     xcursor = None;
 388   else
 389     {
 390       _gdk_x11_cursor_update_theme (cursor);
 391       xcursor = gdk_x11_cursor_get_xcursor (cursor);
 392     }
 393
 394   mask.deviceid = device_xi2->device_id;
 395   mask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &mask.mask_len);
 396
 397 #ifdef G_ENABLE_DEBUG
 398   if (_gdk_debug_flags & GDK_DEBUG_NOGRABS)
 399     status = GrabSuccess;
 400   else
 401 #endif
 402   status = XIGrabDevice (GDK_DISPLAY_XDISPLAY (display),
 403                          device_xi2->device_id,
 404                          xwindow,
 405                          time_,
 406                          xcursor,
 407                          GrabModeAsync, GrabModeAsync,
 408                          owner_events,
 409                          &mask);
 410
 411   g_free (mask.mask);
 412
 413   _gdk_x11_display_update_grab_info (display, device, status);
 414
 415   return _gdk_x11_convert_grab_status (status);
 416 }
 417
 418 static void
 419 gdk_x11_device_xi2_ungrab (GdkDevice *device,
 420                            guint32    time_)
 421 {
 422   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 423   GdkDisplay *display;
 424   gulong serial;
 425
 426   display = gdk_device_get_display (device);
 427   serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
 428
 429   XIUngrabDevice (GDK_DISPLAY_XDISPLAY (display), device_xi2->device_id, time_);
 430
 431   _gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
 432 }
 433
 434 static GdkWindow *
 435 gdk_x11_device_xi2_window_at_position (GdkDevice       *device,
 436                                        gint            *win_x,
 437                                        gint            *win_y,
 438                                        GdkModifierType *mask,
 439                                        gboolean         get_toplevel)
 440 {
 441   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 442   GdkDisplay *display;
 443   GdkScreen *screen;
 444   Display *xdisplay;
 445   GdkWindow *window;
 446   Window xwindow, root, child, last = None;
 447   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 448   XIButtonState button_state;
 449   XIModifierState mod_state;
 450   XIGroupState group_state;
 451
 452   display = gdk_device_get_display (device);
 453   screen = gdk_display_get_default_screen (display);
 454
 455   /* This function really only works if the mouse pointer is held still
 456    * during its operation. If it moves from one leaf window to another
 457    * than we'll end up with inaccurate values for win_x, win_y
 458    * and the result.
 459    */
 460   gdk_x11_display_grab (display);
 461
 462   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 463   xwindow = GDK_SCREEN_XROOTWIN (screen);
 464
 465   if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
 466     {
 467       XIQueryPointer (xdisplay,
 468                       device_xi2->device_id,
 469                       xwindow,
 470                       &root, &child,
 471                       &xroot_x, &xroot_y,
 472                       &xwin_x, &xwin_y,
 473                       &button_state,
 474                       &mod_state,
 475                       &group_state);
 476
 477       if (root == xwindow)
 478         xwindow = child;
 479       else
 480         xwindow = root;
 481     }
 482   else
 483     {
 484       gint i, screens, width, height;
 485       GList *toplevels, *list;
 486       Window pointer_window, root, child;
 487
 488       /* FIXME: untrusted clients case not multidevice-safe */
 489       pointer_window = None;
 490       screens = gdk_display_get_n_screens (display);
 491
 492       for (i = 0; i < screens; ++i)
 493         {
 494           screen = gdk_display_get_screen (display, i);
 495           toplevels = gdk_screen_get_toplevel_windows (screen);
 496           for (list = toplevels; list != NULL; list = g_list_next (list))
 497             {
 498               window = GDK_WINDOW (list->data);
 499               xwindow = GDK_WINDOW_XID (window);
 500               gdk_x11_display_error_trap_push (display);
 501               XIQueryPointer (xdisplay,
 502                               device_xi2->device_id,
 503                               xwindow,
 504                               &root, &child,
 505                               &xroot_x, &xroot_y,
 506                               &xwin_x, &xwin_y,
 507                               &button_state,
 508                               &mod_state,
 509                               &group_state);
 510               if (gdk_x11_display_error_trap_pop (display))
 511                 continue;
 512               if (child != None)
 513                 {
 514                   pointer_window = child;
 515                   break;
 516                 }
 517               gdk_window_get_geometry (window, NULL, NULL, &width, &height);
 518               if (xwin_x >= 0 && xwin_y >= 0 && xwin_x < width && xwin_y < height)
 519                 {
 520                   /* A childless toplevel, or below another window? */
 521                   XSetWindowAttributes attributes;
 522                   Window w;
 523
 524                   w = XCreateWindow (xdisplay, xwindow, (int)xwin_x, (int)xwin_y, 1, 1, 0,
 525                                      CopyFromParent, InputOnly, CopyFromParent,
 526                                      0, &attributes);
 527                   XMapWindow (xdisplay, w);
 528                   XIQueryPointer (xdisplay,
 529                                   device_xi2->device_id,
 530                                   xwindow,
 531                                   &root, &child,
 532                                   &xroot_x, &xroot_y,
 533                                   &xwin_x, &xwin_y,
 534                                   &button_state,
 535                                   &mod_state,
 536                                   &group_state);
 537                   XDestroyWindow (xdisplay, w);
 538                   if (child == w)
 539                     {
 540                       pointer_window = xwindow;
 541                       break;
 542                     }
 543                 }
 544             }
 545
 546           g_list_free (toplevels);
 547           if (pointer_window != None)
 548             break;
 549         }
 550
 551       xwindow = pointer_window;
 552     }
 553
 554   while (xwindow)
 555     {
 556       last = xwindow;
 557       gdk_x11_display_error_trap_push (display);
 558       XIQueryPointer (xdisplay,
 559                       device_xi2->device_id,
 560                       xwindow,
 561                       &root, &xwindow,
 562                       &xroot_x, &xroot_y,
 563                       &xwin_x, &xwin_y,
 564                       &button_state,
 565                       &mod_state,
 566                       &group_state);
 567       if (gdk_x11_display_error_trap_pop (display))
 568         break;
 569
 570       if (get_toplevel && last != root &&
 571           (window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
 572           GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
 573         {
 574           xwindow = last;
 575           break;
 576         }
 577     }
 578
 579   gdk_x11_display_ungrab (display);
 580
 581   window = gdk_x11_window_lookup_for_display (display, last);
 582
 583   if (win_x)
 584     *win_x = (window) ? (gint) xwin_x : -1;
 585
 586   if (win_y)
 587     *win_y = (window) ? (gint) xwin_y : -1;
 588
 589   if (mask)
 590     *mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state);
 591
 592   return window;
 593 }
 594
 595 static void
 596 gdk_x11_device_xi2_select_window_events (GdkDevice    *device,
 597                                          GdkWindow    *window,
 598                                          GdkEventMask  event_mask)
 599 {
 600   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 601   XIEventMask evmask;
 602
 603   evmask.deviceid = device_xi2->device_id;
 604   evmask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &evmask.mask_len);
 605
 606   XISelectEvents (GDK_WINDOW_XDISPLAY (window),
 607                   GDK_WINDOW_XID (window),
 608                   &evmask, 1);
 609
 610   g_free (evmask.mask);
 611 }
 612
 613 guchar *
 614 _gdk_x11_device_xi2_translate_event_mask (GdkEventMask  event_mask,
 615                                           gint         *len)
 616 {
 617   guchar *mask;
 618
 619   *len = XIMaskLen (XI_LASTEVENT);
 620   mask = g_new0 (guchar, *len);
 621
 622   if (event_mask & GDK_POINTER_MOTION_MASK ||
 623       event_mask & GDK_POINTER_MOTION_HINT_MASK)
 624     XISetMask (mask, XI_Motion);
 625
 626   if (event_mask & GDK_BUTTON_MOTION_MASK ||
 627       event_mask & GDK_BUTTON1_MOTION_MASK ||
 628       event_mask & GDK_BUTTON2_MOTION_MASK ||
 629       event_mask & GDK_BUTTON3_MOTION_MASK)
 630     {
 631       XISetMask (mask, XI_ButtonPress);
 632       XISetMask (mask, XI_ButtonRelease);
 633       XISetMask (mask, XI_Motion);
 634     }
 635
 636   if (event_mask & GDK_SCROLL_MASK)
 637     {
 638       XISetMask (mask, XI_ButtonPress);
 639       XISetMask (mask, XI_ButtonRelease);
 640     }
 641
 642   if (event_mask & GDK_BUTTON_PRESS_MASK)
 643     XISetMask (mask, XI_ButtonPress);
 644
 645   if (event_mask & GDK_BUTTON_RELEASE_MASK)
 646     XISetMask (mask, XI_ButtonRelease);
 647
 648   if (event_mask & GDK_KEY_PRESS_MASK)
 649     XISetMask (mask, XI_KeyPress);
 650
 651   if (event_mask & GDK_KEY_RELEASE_MASK)
 652     XISetMask (mask, XI_KeyRelease);
 653
 654   if (event_mask & GDK_ENTER_NOTIFY_MASK)
 655     XISetMask (mask, XI_Enter);
 656
 657   if (event_mask & GDK_LEAVE_NOTIFY_MASK)
 658     XISetMask (mask, XI_Leave);
 659
 660   if (event_mask & GDK_FOCUS_CHANGE_MASK)
 661     {
 662       XISetMask (mask, XI_FocusIn);
 663       XISetMask (mask, XI_FocusOut);
 664     }
 665
 666   return mask;
 667 }
 668
 669 guint
 670 _gdk_x11_device_xi2_translate_state (XIModifierState *mods_state,
 671                                      XIButtonState   *buttons_state)
 672 {
 673   guint state = 0;
 674
 675   if (mods_state)
 676     state = (guint) mods_state->effective;
 677
 678   if (buttons_state)
 679     {
 680       gint len, i;
 681
 682       /* We're only interested in the first 5 buttons */
 683       len = MIN (5, buttons_state->mask_len * 8);
 684
 685       for (i = 0; i < len; i++)
 686         {
 687           if (!XIMaskIsSet (buttons_state->mask, i))
 688             continue;
 689
 690           switch (i)
 691             {
 692             case 1:
 693               state |= GDK_BUTTON1_MASK;
 694               break;
 695             case 2:
 696               state |= GDK_BUTTON2_MASK;
 697               break;
 698             case 3:
 699               state |= GDK_BUTTON3_MASK;
 700               break;
 701             case 4:
 702               state |= GDK_BUTTON4_MASK;
 703               break;
 704             case 5:
 705               state |= GDK_BUTTON5_MASK;
 706               break;
 707             default:
 708               break;
 709             }
 710         }
 711     }
 712
 713   return state;
 714 }