barriers: Make barriers fully part of the backend

Prior to this commit, barriers were created with a MetaDisplay pointer,
despite being entities related and owned by the backend. In the X11
case, it was also not hooked up to the backend X11 connection, but the
clutter one, meaning for example that the logic was active (but dormant)
also for the Xwayland connection.

Fix this by moving X11 barrier management and event processing fully to
the backend. Also replace passing a display pointer with passing a
backend pointer. Keep the display pointer around for a release, but mark
it as deprecated.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2442>

1 files changed, 2 insertions, 14 deletions

diff --git a/src/x11/meta-x11-display.c b/src/x11/meta-x11-display.c
index bb5f4bf50..3139246cc 100644
--- a/src/x11/meta-x11-display.c
+++ b/src/x11/meta-x11-display.c
@@ -429,15 +429,8 @@ query_xi_extension (MetaX11Display *x11_display)
                        &x11_display->xinput_error_base,
                        &x11_display->xinput_event_base))
     {
-        if (XIQueryVersion (x11_display->xdisplay, &major, &minor) == Success)
-        {
-          int version = (major * 10) + minor;
-          if (version >= 22)
-            has_xi = TRUE;
-
-          if (version >= 23)
-            x11_display->have_xinput_23 = TRUE;
-        }
+      if (XIQueryVersion (x11_display->xdisplay, &major, &minor) == Success)
+        has_xi = TRUE;
     }
 
   if (!has_xi)
@@ -792,11 +785,6 @@ init_event_masks (MetaX11Display *x11_display)
   XISetMask (mask.mask, XI_Leave);
   XISetMask (mask.mask, XI_FocusIn);
   XISetMask (mask.mask, XI_FocusOut);
-  if (META_X11_DISPLAY_HAS_XINPUT_23 (x11_display))
-    {
-      XISetMask (mask.mask, XI_BarrierHit);
-      XISetMask (mask.mask, XI_BarrierLeave);
-    }
   XISelectEvents (x11_display->xdisplay, x11_display->xroot, &mask, 1);
 
   event_mask = (SubstructureRedirectMask | SubstructureNotifyMask |