[gtk/ebassi/for-master: 18/18] a11y: Cache the accessibility bus address

[Emmanuele Bassi <ebassi src gnome org>]

commit ef86e46238df288cccc2addf58512d010279192d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Nov 22 18:40:50 2020 +0000

    a11y: Cache the accessibility bus address
    
    Just check for it once; doing it every time we failed to create an
    ATContext is just going to fill up the logs.

 gtk/a11y/gtkatspicontext.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/gtk/a11y/gtkatspicontext.c b/gtk/a11y/gtkatspicontext.c
index 3216c33a40..46b157a3fa 100644
--- a/gtk/a11y/gtkatspicontext.c
+++ b/gtk/a11y/gtkatspicontext.c
@@ -1711,9 +1711,17 @@ gtk_at_spi_create_context (GtkAccessibleRole  accessible_role,
   g_return_val_if_fail (GTK_IS_ACCESSIBLE (accessible), NULL);
   g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
 
-  const char *bus_address = get_bus_address (display);
+  static const char *bus_address;
 
   if (bus_address == NULL)
+    {
+      bus_address = get_bus_address (display);
+
+      if (bus_address == NULL)
+        bus_address = "";
+    }
+
+  if (*bus_address == '\0')
     return NULL;
 
 #if defined(GDK_WINDOWING_WAYLAND)