Don't add in our old input event mask when we select input events

This causes a round-trip to the server, and just isn't necessary, since
we're always in charge of our event mask.

src/compositor/compositor.c

@@ -159,8 +159,6 @@ get_output_window (MetaCompositor *compositor)
 
   output = XCompositeGetOverlayWindow (xdisplay, DefaultRootWindow (xdisplay));
 
-  meta_core_add_old_event_mask (xdisplay, output, &mask);
-
   XISetMask (mask.mask, XI_KeyPress);
   XISetMask (mask.mask, XI_KeyRelease);
   XISetMask (mask.mask, XI_ButtonPress);
@@ -518,8 +516,6 @@ meta_compositor_manage (MetaCompositor *compositor)
           unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
           XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
 
-          meta_core_add_old_event_mask (backend_xdisplay, xwin, &mask);
-
           XISetMask (mask.mask, XI_KeyPress);
           XISetMask (mask.mask, XI_KeyRelease);
           XISetMask (mask.mask, XI_ButtonPress);

src/core/core.c

@@ -516,25 +516,3 @@ meta_invalidate_default_icons (void)
 
   g_slist_free (windows);
 }
-
-void
-meta_core_add_old_event_mask (Display     *xdisplay,
-                              Window       xwindow,
-                              XIEventMask *mask)
-{
-  XIEventMask *prev;
-  gint n_masks, i, j;
-
-  prev = XIGetSelectedEvents (xdisplay, xwindow, &n_masks);
-
-  for (i = 0; i < n_masks; i++)
-    {
-      if (prev[i].deviceid != XIAllMasterDevices)
-        continue;
-
-      for (j = 0; j < MIN (mask->mask_len, prev[i].mask_len); j++)
-        mask->mask[j] |= prev[i].mask[j];
-    }
-
-  XFree (prev);
-}

src/core/core.h

@@ -169,8 +169,4 @@ void       meta_core_set_screen_cursor (Display *xdisplay,
 
 void meta_invalidate_default_icons (void);
 
-void meta_core_add_old_event_mask (Display     *xdisplay,
-                                   Window       xwindow,
-                                   XIEventMask *mask);
-
 #endif

src/core/screen.c

@@ -620,17 +620,12 @@ meta_screen_new (MetaDisplay *display,
   /* select our root window events */
   meta_error_trap_push (display);
 
-  /* We need to or with the existing event mask since
-   * gtk+ may be interested in other events.
-   */
   {
     long event_mask;
     unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
     XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
     XWindowAttributes attr;
 
-    meta_core_add_old_event_mask (xdisplay, xroot, &mask);
-
     XISetMask (mask.mask, XI_KeyPress);
     XISetMask (mask.mask, XI_KeyRelease);
     XISetMask (mask.mask, XI_Enter);

src/x11/window-x11.c

@@ -3074,8 +3074,6 @@ meta_window_x11_new (MetaDisplay       *display,
     unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
     XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
 
-    meta_core_add_old_event_mask (display->xdisplay, xwindow, &mask);
-
     XISetMask (mask.mask, XI_Enter);
     XISetMask (mask.mask, XI_Leave);
     XISetMask (mask.mask, XI_FocusIn);