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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "config.h"
  19
  20 #include "gdkx11device-xi2.h"
  21 #include "gdkdeviceprivate.h"
  22
  23 #include "gdkintl.h"
  24 #include "gdkasync.h"
  25 #include "gdkprivate-x11.h"
  26
  27 #ifdef XINPUT_2
  28
  29 #include <stdlib.h>
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <X11/extensions/XInput2.h>
  33
  34 #endif
  35
  36 struct _GdkX11DeviceXI2
  37 {
  38   GdkDevice parent_instance;
  39
  40   gint device_id;
  41 };
  42
  43 struct _GdkX11DeviceXI2Class
  44 {
  45   GdkDeviceClass parent_class;
  46 };
  47
  48 G_DEFINE_TYPE (GdkX11DeviceXI2, gdk_x11_device_xi2, GDK_TYPE_DEVICE)
  49
  50 #ifdef XINPUT_2
  51
  52 static void gdk_x11_device_xi2_get_property (GObject      *object,
  53                                              guint         prop_id,
  54                                              GValue       *value,
  55                                              GParamSpec   *pspec);
  56 static void gdk_x11_device_xi2_set_property (GObject      *object,
  57                                              guint         prop_id,
  58                                              const GValue *value,
  59                                              GParamSpec   *pspec);
  60
  61 static void gdk_x11_device_xi2_get_state (GdkDevice       *device,
  62                                           GdkWindow       *window,
  63                                           gdouble         *axes,
  64                                           GdkModifierType *mask);
  65 static void gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
  66                                                   GdkWindow *window,
  67                                                   GdkCursor *cursor);
  68 static void gdk_x11_device_xi2_warp (GdkDevice *device,
  69                                      GdkScreen *screen,
  70                                      gint       x,
  71                                      gint       y);
  72 static gboolean gdk_x11_device_xi2_query_state (GdkDevice        *device,
  73                                                 GdkWindow        *window,
  74                                                 GdkWindow       **root_window,
  75                                                 GdkWindow       **child_window,
  76                                                 gint             *root_x,
  77                                                 gint             *root_y,
  78                                                 gint             *win_x,
  79                                                 gint             *win_y,
  80                                                 GdkModifierType  *mask);
  81
  82 static GdkGrabStatus gdk_x11_device_xi2_grab   (GdkDevice     *device,
  83                                                 GdkWindow     *window,
  84                                                 gboolean       owner_events,
  85                                                 GdkEventMask   event_mask,
  86                                                 GdkWindow     *confine_to,
  87                                                 GdkCursor     *cursor,
  88                                                 guint32        time_);
  89 static void          gdk_x11_device_xi2_ungrab (GdkDevice     *device,
  90                                                 guint32        time_);
  91
  92 static GdkWindow * gdk_x11_device_xi2_window_at_position (GdkDevice       *device,
  93                                                           gint            *win_x,
  94                                                           gint            *win_y,
  95                                                           GdkModifierType *mask,
  96                                                           gboolean         get_toplevel);
  97 static void  gdk_x11_device_xi2_select_window_events (GdkDevice    *device,
  98                                                       GdkWindow    *window,
  99                                                       GdkEventMask  event_mask);
 100
 101
 102 enum {
 103   PROP_0,
 104   PROP_DEVICE_ID
 105 };
 106
 107 static void
 108 gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
 109 {
 110   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 111   GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
 112
 113   object_class->get_property = gdk_x11_device_xi2_get_property;
 114   object_class->set_property = gdk_x11_device_xi2_set_property;
 115
 116   device_class->get_state = gdk_x11_device_xi2_get_state;
 117   device_class->set_window_cursor = gdk_x11_device_xi2_set_window_cursor;
 118   device_class->warp = gdk_x11_device_xi2_warp;
 119   device_class->query_state = gdk_x11_device_xi2_query_state;
 120   device_class->grab = gdk_x11_device_xi2_grab;
 121   device_class->ungrab = gdk_x11_device_xi2_ungrab;
 122   device_class->window_at_position = gdk_x11_device_xi2_window_at_position;
 123   device_class->select_window_events = gdk_x11_device_xi2_select_window_events;
 124
 125   g_object_class_install_property (object_class,
 126                                    PROP_DEVICE_ID,
 127                                    g_param_spec_int ("device-id",
 128                                                      P_("Device ID"),
 129                                                      P_("Device identifier"),
 130                                                      0, G_MAXINT, 0,
 131                                                      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 132 }
 133
 134 static void
 135 gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
 136 {
 137 }
 138
 139 static void
 140 gdk_x11_device_xi2_get_property (GObject    *object,
 141                                  guint       prop_id,
 142                                  GValue     *value,
 143                                  GParamSpec *pspec)
 144 {
 145   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
 146
 147   switch (prop_id)
 148     {
 149     case PROP_DEVICE_ID:
 150       g_value_set_int (value, device_xi2->device_id);
 151       break;
 152     default:
 153       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 154       break;
 155     }
 156 }
 157
 158 static void
 159 gdk_x11_device_xi2_set_property (GObject      *object,
 160                                  guint         prop_id,
 161                                  const GValue *value,
 162                                  GParamSpec   *pspec)
 163 {
 164   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
 165
 166   switch (prop_id)
 167     {
 168     case PROP_DEVICE_ID:
 169       device_xi2->device_id = g_value_get_int (value);
 170       break;
 171     default:
 172       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 173       break;
 174     }
 175 }
 176
 177 static void
 178 gdk_x11_device_xi2_get_state (GdkDevice       *device,
 179                               GdkWindow       *window,
 180                               gdouble         *axes,
 181                               GdkModifierType *mask)
 182 {
 183   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 184
 185   if (axes)
 186     {
 187       GdkDisplay *display;
 188       XIDeviceInfo *info;
 189       gint i, j, ndevices;
 190
 191       display = gdk_device_get_display (device);
 192
 193       gdk_x11_display_error_trap_push (display);
 194       info = XIQueryDevice (GDK_DISPLAY_XDISPLAY (display),
 195                             device_xi2->device_id, &ndevices);
 196       gdk_x11_display_error_trap_pop_ignored (display);
 197
 198       for (i = 0, j = 0; info && i < info->num_classes; i++)
 199         {
 200           XIAnyClassInfo *class_info = info->classes[i];
 201           GdkAxisUse use;
 202           gdouble value;
 203
 204           if (class_info->type != XIValuatorClass)
 205             continue;
 206
 207           value = ((XIValuatorClassInfo *) class_info)->value;
 208           use = gdk_device_get_axis_use (device, j);
 209
 210           switch (use)
 211             {
 212             case GDK_AXIS_X:
 213             case GDK_AXIS_Y:
 214             case GDK_AXIS_IGNORE:
 215               if (gdk_device_get_mode (device) == GDK_MODE_WINDOW)
 216                 _gdk_device_translate_window_coord (device, window, j, value, &axes[j]);
 217               else
 218                 {
 219                   gint root_x, root_y;
 220
 221                   /* FIXME: Maybe root coords chaching should happen here */
 222                   gdk_window_get_origin (window, &root_x, &root_y);
 223                   _gdk_device_translate_screen_coord (device, window,
 224                                                       root_x, root_y,
 225                                                       j, value,
 226                                                       &axes[j]);
 227                 }
 228               break;
 229             default:
 230               _gdk_device_translate_axis (device, j, value, &axes[j]);
 231               break;
 232             }
 233
 234           j++;
 235         }
 236
 237       if (info)
 238         XIFreeDeviceInfo (info);
 239     }
 240
 241   if (mask)
 242     gdk_x11_device_xi2_query_state (device, window,
 243                                     NULL, NULL,
 244                                     NULL, NULL,
 245                                     NULL, NULL,
 246                                     mask);
 247 }
 248
 249 static void
 250 gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
 251                                       GdkWindow *window,
 252                                       GdkCursor *cursor)
 253 {
 254   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 255
 256   /* Non-master devices don't have a cursor */
 257   if (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_MASTER)
 258     return;
 259
 260   if (cursor)
 261     XIDefineCursor (GDK_WINDOW_XDISPLAY (window),
 262                     device_xi2->device_id,
 263                     GDK_WINDOW_XID (window),
 264                     gdk_x11_cursor_get_xcursor (cursor));
 265   else
 266     XIUndefineCursor (GDK_WINDOW_XDISPLAY (window),
 267                       device_xi2->device_id,
 268                       GDK_WINDOW_XID (window));
 269 }
 270
 271 static void
 272 gdk_x11_device_xi2_warp (GdkDevice *device,
 273                          GdkScreen *screen,
 274                          gint       x,
 275                          gint       y)
 276 {
 277   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 278   Window dest;
 279
 280   dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
 281
 282   XIWarpPointer (GDK_SCREEN_XDISPLAY (screen),
 283                  device_xi2->device_id,
 284                  None, dest,
 285                  0, 0, 0, 0, x, y);
 286 }
 287
 288 static gboolean
 289 gdk_x11_device_xi2_query_state (GdkDevice        *device,
 290                                 GdkWindow        *window,
 291                                 GdkWindow       **root_window,
 292                                 GdkWindow       **child_window,
 293                                 gint             *root_x,
 294                                 gint             *root_y,
 295                                 gint             *win_x,
 296                                 gint             *win_y,
 297                                 GdkModifierType  *mask)
 298 {
 299   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 300   GdkDisplay *display;
 301   GdkScreen *default_screen;
 302   Window xroot_window, xchild_window;
 303   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 304   XIButtonState button_state;
 305   XIModifierState mod_state;
 306   XIGroupState group_state;
 307
 308   if (!window || GDK_WINDOW_DESTROYED (window))
 309     return FALSE;
 310
 311   display = gdk_window_get_display (window);
 312   default_screen = gdk_display_get_default_screen (display);
 313
 314   if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
 315     {
 316       if (!XIQueryPointer (GDK_WINDOW_XDISPLAY (window),
 317                            device_xi2->device_id,
 318                            GDK_WINDOW_XID (window),
 319                            &xroot_window,
 320                            &xchild_window,
 321                            &xroot_x, &xroot_y,
 322                            &xwin_x, &xwin_y,
 323                            &button_state,
 324                            &mod_state,
 325                            &group_state))
 326         return FALSE;
 327     }
 328   else
 329     {
 330       XSetWindowAttributes attributes;
 331       Display *xdisplay;
 332       Window xwindow, w;
 333
 334       /* FIXME: untrusted clients not multidevice-safe */
 335       xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
 336       xwindow = GDK_SCREEN_XROOTWIN (default_screen);
 337
 338       w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
 339                          CopyFromParent, InputOnly, CopyFromParent,
 340                          0, &attributes);
 341       XIQueryPointer (xdisplay, device_xi2->device_id,
 342                       w,
 343                       &xroot_window,
 344                       &xchild_window,
 345                       &xroot_x, &xroot_y,
 346                       &xwin_x, &xwin_y,
 347                       &button_state,
 348                       &mod_state,
 349                       &group_state);
 350       XDestroyWindow (xdisplay, w);
 351     }
 352
 353   if (root_window)
 354     *root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
 355
 356   if (child_window)
 357     *child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
 358
 359   if (root_x)
 360     *root_x = (gint) xroot_x;
 361
 362   if (root_y)
 363     *root_y = (gint) xroot_y;
 364
 365   if (win_x)
 366     *win_x = (gint) xwin_x;
 367
 368   if (win_y)
 369     *win_y = (gint) xwin_y;
 370
 371   if (mask)
 372     *mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
 373
 374   free (button_state.mask);
 375
 376   return TRUE;
 377 }
 378
 379 static GdkGrabStatus
 380 gdk_x11_device_xi2_grab (GdkDevice    *device,
 381                          GdkWindow    *window,
 382                          gboolean      owner_events,
 383                          GdkEventMask  event_mask,
 384                          GdkWindow    *confine_to,
 385                          GdkCursor    *cursor,
 386                          guint32       time_)
 387 {
 388   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 389   GdkDisplay *display;
 390   XIEventMask mask;
 391   Window xwindow;
 392   Cursor xcursor;
 393   gint status;
 394
 395   display = gdk_device_get_display (device);
 396
 397   /* FIXME: confine_to is actually unused */
 398
 399   xwindow = GDK_WINDOW_XID (window);
 400
 401   if (!cursor)
 402     xcursor = None;
 403   else
 404     {
 405       _gdk_x11_cursor_update_theme (cursor);
 406       xcursor = gdk_x11_cursor_get_xcursor (cursor);
 407     }
 408
 409   mask.deviceid = device_xi2->device_id;
 410   mask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &mask.mask_len);
 411
 412 #ifdef G_ENABLE_DEBUG
 413   if (_gdk_debug_flags & GDK_DEBUG_NOGRABS)
 414     status = GrabSuccess;
 415   else
 416 #endif
 417   status = XIGrabDevice (GDK_DISPLAY_XDISPLAY (display),
 418                          device_xi2->device_id,
 419                          xwindow,
 420                          time_,
 421                          xcursor,
 422                          GrabModeAsync, GrabModeAsync,
 423                          owner_events,
 424                          &mask);
 425
 426   g_free (mask.mask);
 427
 428   _gdk_x11_display_update_grab_info (display, device, status);
 429
 430   return _gdk_x11_convert_grab_status (status);
 431 }
 432
 433 static void
 434 gdk_x11_device_xi2_ungrab (GdkDevice *device,
 435                            guint32    time_)
 436 {
 437   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 438   GdkDisplay *display;
 439   gulong serial;
 440
 441   display = gdk_device_get_display (device);
 442   serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
 443
 444   XIUngrabDevice (GDK_DISPLAY_XDISPLAY (display), device_xi2->device_id, time_);
 445
 446   _gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
 447 }
 448
 449 static GdkWindow *
 450 gdk_x11_device_xi2_window_at_position (GdkDevice       *device,
 451                                        gint            *win_x,
 452                                        gint            *win_y,
 453                                        GdkModifierType *mask,
 454                                        gboolean         get_toplevel)
 455 {
 456   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 457   GdkDisplay *display;
 458   GdkScreen *screen;
 459   Display *xdisplay;
 460   GdkWindow *window;
 461   Window xwindow, root, child, last = None;
 462   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 463   XIButtonState button_state = { 0 };
 464   XIModifierState mod_state;
 465   XIGroupState group_state;
 466
 467   display = gdk_device_get_display (device);
 468   screen = gdk_display_get_default_screen (display);
 469
 470   /* This function really only works if the mouse pointer is held still
 471    * during its operation. If it moves from one leaf window to another
 472    * than we'll end up with inaccurate values for win_x, win_y
 473    * and the result.
 474    */
 475   gdk_x11_display_grab (display);
 476
 477   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 478   xwindow = GDK_SCREEN_XROOTWIN (screen);
 479
 480   if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
 481     {
 482       XIQueryPointer (xdisplay,
 483                       device_xi2->device_id,
 484                       xwindow,
 485                       &root, &child,
 486                       &xroot_x, &xroot_y,
 487                       &xwin_x, &xwin_y,
 488                       &button_state,
 489                       &mod_state,
 490                       &group_state);
 491
 492       if (root == xwindow)
 493         xwindow = child;
 494       else
 495         xwindow = root;
 496     }
 497   else
 498     {
 499       gint i, screens, width, height;
 500       GList *toplevels, *list;
 501       Window pointer_window, root, child;
 502
 503       /* FIXME: untrusted clients case not multidevice-safe */
 504       pointer_window = None;
 505       screens = gdk_display_get_n_screens (display);
 506
 507       for (i = 0; i < screens; ++i)
 508         {
 509           screen = gdk_display_get_screen (display, i);
 510           toplevels = gdk_screen_get_toplevel_windows (screen);
 511           for (list = toplevels; list != NULL; list = g_list_next (list))
 512             {
 513               window = GDK_WINDOW (list->data);
 514               xwindow = GDK_WINDOW_XID (window);
 515
 516               /* Free previous button mask, if any */
 517               g_free (button_state.mask);
 518
 519               gdk_x11_display_error_trap_push (display);
 520               XIQueryPointer (xdisplay,
 521                               device_xi2->device_id,
 522                               xwindow,
 523                               &root, &child,
 524                               &xroot_x, &xroot_y,
 525                               &xwin_x, &xwin_y,
 526                               &button_state,
 527                               &mod_state,
 528                               &group_state);
 529               if (gdk_x11_display_error_trap_pop (display))
 530                 continue;
 531               if (child != None)
 532                 {
 533                   pointer_window = child;
 534                   break;
 535                 }
 536               gdk_window_get_geometry (window, NULL, NULL, &width, &height);
 537               if (xwin_x >= 0 && xwin_y >= 0 && xwin_x < width && xwin_y < height)
 538                 {
 539                   /* A childless toplevel, or below another window? */
 540                   XSetWindowAttributes attributes;
 541                   Window w;
 542
 543                   free (button_state.mask);
 544
 545                   w = XCreateWindow (xdisplay, xwindow, (int)xwin_x, (int)xwin_y, 1, 1, 0,
 546                                      CopyFromParent, InputOnly, CopyFromParent,
 547                                      0, &attributes);
 548                   XMapWindow (xdisplay, w);
 549                   XIQueryPointer (xdisplay,
 550                                   device_xi2->device_id,
 551                                   xwindow,
 552                                   &root, &child,
 553                                   &xroot_x, &xroot_y,
 554                                   &xwin_x, &xwin_y,
 555                                   &button_state,
 556                                   &mod_state,
 557                                   &group_state);
 558                   XDestroyWindow (xdisplay, w);
 559                   if (child == w)
 560                     {
 561                       pointer_window = xwindow;
 562                       break;
 563                     }
 564                 }
 565             }
 566
 567           g_list_free (toplevels);
 568           if (pointer_window != None)
 569             break;
 570         }
 571
 572       xwindow = pointer_window;
 573     }
 574
 575   while (xwindow)
 576     {
 577       last = xwindow;
 578       free (button_state.mask);
 579
 580       gdk_x11_display_error_trap_push (display);
 581       XIQueryPointer (xdisplay,
 582                       device_xi2->device_id,
 583                       xwindow,
 584                       &root, &xwindow,
 585                       &xroot_x, &xroot_y,
 586                       &xwin_x, &xwin_y,
 587                       &button_state,
 588                       &mod_state,
 589                       &group_state);
 590       if (gdk_x11_display_error_trap_pop (display))
 591         break;
 592
 593       if (get_toplevel && last != root &&
 594           (window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
 595           GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
 596         {
 597           xwindow = last;
 598           break;
 599         }
 600     }
 601
 602   gdk_x11_display_ungrab (display);
 603
 604   window = gdk_x11_window_lookup_for_display (display, last);
 605
 606   if (win_x)
 607     *win_x = (window) ? (gint) xwin_x : -1;
 608
 609   if (win_y)
 610     *win_y = (window) ? (gint) xwin_y : -1;
 611
 612   if (mask)
 613     *mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
 614
 615   free (button_state.mask);
 616
 617   return window;
 618 }
 619
 620 static void
 621 gdk_x11_device_xi2_select_window_events (GdkDevice    *device,
 622                                          GdkWindow    *window,
 623                                          GdkEventMask  event_mask)
 624 {
 625   GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
 626   XIEventMask evmask;
 627
 628   evmask.deviceid = device_xi2->device_id;
 629   evmask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &evmask.mask_len);
 630
 631   XISelectEvents (GDK_WINDOW_XDISPLAY (window),
 632                   GDK_WINDOW_XID (window),
 633                   &evmask, 1);
 634
 635   g_free (evmask.mask);
 636 }
 637
 638 guchar *
 639 _gdk_x11_device_xi2_translate_event_mask (GdkEventMask  event_mask,
 640                                           gint         *len)
 641 {
 642   guchar *mask;
 643
 644   *len = XIMaskLen (XI_LASTEVENT);
 645   mask = g_new0 (guchar, *len);
 646
 647   if (event_mask & GDK_POINTER_MOTION_MASK ||
 648       event_mask & GDK_POINTER_MOTION_HINT_MASK)
 649     XISetMask (mask, XI_Motion);
 650
 651   if (event_mask & GDK_BUTTON_MOTION_MASK ||
 652       event_mask & GDK_BUTTON1_MOTION_MASK ||
 653       event_mask & GDK_BUTTON2_MOTION_MASK ||
 654       event_mask & GDK_BUTTON3_MOTION_MASK)
 655     {
 656       XISetMask (mask, XI_ButtonPress);
 657       XISetMask (mask, XI_ButtonRelease);
 658       XISetMask (mask, XI_Motion);
 659     }
 660
 661   if (event_mask & GDK_SCROLL_MASK)
 662     {
 663       XISetMask (mask, XI_ButtonPress);
 664       XISetMask (mask, XI_ButtonRelease);
 665     }
 666
 667   if (event_mask & GDK_BUTTON_PRESS_MASK)
 668     XISetMask (mask, XI_ButtonPress);
 669
 670   if (event_mask & GDK_BUTTON_RELEASE_MASK)
 671     XISetMask (mask, XI_ButtonRelease);
 672
 673   if (event_mask & GDK_KEY_PRESS_MASK)
 674     XISetMask (mask, XI_KeyPress);
 675
 676   if (event_mask & GDK_KEY_RELEASE_MASK)
 677     XISetMask (mask, XI_KeyRelease);
 678
 679   if (event_mask & GDK_ENTER_NOTIFY_MASK)
 680     XISetMask (mask, XI_Enter);
 681
 682   if (event_mask & GDK_LEAVE_NOTIFY_MASK)
 683     XISetMask (mask, XI_Leave);
 684
 685   if (event_mask & GDK_FOCUS_CHANGE_MASK)
 686     {
 687       XISetMask (mask, XI_FocusIn);
 688       XISetMask (mask, XI_FocusOut);
 689     }
 690
 691   return mask;
 692 }
 693
 694 guint
 695 _gdk_x11_device_xi2_translate_state (XIModifierState *mods_state,
 696                                      XIButtonState   *buttons_state,
 697                                      XIGroupState    *group_state)
 698 {
 699   guint state = 0;
 700
 701   if (mods_state)
 702     state = (guint) mods_state->base | mods_state->latched | mods_state->locked;
 703
 704   if (buttons_state)
 705     {
 706       gint len, i;
 707
 708       /* We're only interested in the first 5 buttons */
 709       len = MIN (5, buttons_state->mask_len * 8);
 710
 711       for (i = 0; i < len; i++)
 712         {
 713           if (!XIMaskIsSet (buttons_state->mask, i))
 714             continue;
 715
 716           switch (i)
 717             {
 718             case 1:
 719               state |= GDK_BUTTON1_MASK;
 720               break;
 721             case 2:
 722               state |= GDK_BUTTON2_MASK;
 723               break;
 724             case 3:
 725               state |= GDK_BUTTON3_MASK;
 726               break;
 727             case 4:
 728               state |= GDK_BUTTON4_MASK;
 729               break;
 730             case 5:
 731               state |= GDK_BUTTON5_MASK;
 732               break;
 733             default:
 734               break;
 735             }
 736         }
 737     }
 738
 739   if (group_state)
 740     {
 741       gint group;
 742
 743       group = group_state->base | group_state->latched | group_state->locked;
 744
 745       /* FIXME: do we need the XKB complications for this ? */
 746       group = CLAMP(group, 0, 3);
 747
 748       state |= group << 13;
 749     }
 750
 751   return state;
 752 }
 753
 754 gint
 755 _gdk_x11_device_xi2_get_id (GdkX11DeviceXI2 *device)
 756 {
 757   g_return_val_if_fail (GDK_IS_X11_DEVICE_XI2 (device), 0);
 758
 759   return device->device_id;
 760 }
 761
 762 #else /* XINPUT_2 */
 763
 764 static void
 765 gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
 766 {
 767 }
 768
 769 static void
 770 gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
 771 {
 772 }
 773
 774 #endif /* XINPUT_2 */