display-x11: Unset tiled state if _GTK_EDGE_CONSTRAINTS is supported

Commit c415bef5de introduced support for the new _GTK_EDGE_CONSTRAINTS
atom. If the compositor supports that atom, however, we were always
setting the tiled state, even if no actual tiling information is
available, where the correct action is to completely remove any traces
of the tiled state.

Fix that by correctly removing the tiled state when compositor supports
_GTK_EDGE_CONSTRAINTS Xatom.

https://bugzilla.gnome.org/show_bug.cgi?id=788516

Gbp-Pq: Name 0003-display-x11-Unset-tiled-state-if-_GTK_EDGE_CONSTRAIN.patch

diff --git a/gdk/x11/gdkdisplay-x11.c b/gdk/x11/gdkdisplay-x11.c
index e9a263f23dd6d0014c96a366f5e0ab46d387665f..964edbccaedae0a64e36b782c5d800b628e8ac9e 100644 (file)
--- a/gdk/x11/gdkdisplay-x11.c
+++ b/gdk/x11/gdkdisplay-x11.c
@@ -228,10 +228,8 @@ do_edge_constraint_state_check (GdkWindow      *window,
     }
   else
     {
-      if (!(old_state & GDK_WINDOW_STATE_TILED))
-        {
-          local_set |= GDK_WINDOW_STATE_TILED;
-        }
+      if (old_state & GDK_WINDOW_STATE_TILED)
+        local_unset |= GDK_WINDOW_STATE_TILED;
     }
 
   /* Top edge */