[mutter] Add meta_wayland_get_[x]wayland_display_name

[Owen Taylor <otaylor src gnome org>]

commit 0706de53789bf757d17bdf723071414ee6805211
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Thu Sep 11 10:07:34 2014 -0400

    Add meta_wayland_get_[x]wayland_display_name
    
    Add private functions for the test framework to use to find out the
    wayland and x11 display names, so they can set up the environment for
    children.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736505

 src/wayland/meta-wayland.c |   16 ++++++++++++++--
 src/wayland/meta-wayland.h |    3 +++
 2 files changed, 17 insertions(+), 2 deletions(-)
---
diff --git a/src/wayland/meta-wayland.c b/src/wayland/meta-wayland.c
index 32fde1e..ce4a022 100644
--- a/src/wayland/meta-wayland.c
+++ b/src/wayland/meta-wayland.c
@@ -446,8 +446,20 @@ meta_wayland_init (void)
   if (!meta_xwayland_start (&compositor->xwayland_manager, compositor->wayland_display))
     g_error ("Failed to start X Wayland");
 
-  set_gnome_env ("DISPLAY", compositor->xwayland_manager.display_name);
-  set_gnome_env ("WAYLAND_DISPLAY", compositor->display_name);
+  set_gnome_env ("DISPLAY", meta_wayland_get_xwayland_display_name (compositor));
+  set_gnome_env ("WAYLAND_DISPLAY", meta_wayland_get_wayland_display_name (compositor));
+}
+
+const char *
+meta_wayland_get_wayland_display_name (MetaWaylandCompositor *compositor)
+{
+  return compositor->display_name;
+}
+
+const char *
+meta_wayland_get_xwayland_display_name (MetaWaylandCompositor *compositor)
+{
+  return compositor->xwayland_manager.display_name;
 }
 
 void
diff --git a/src/wayland/meta-wayland.h b/src/wayland/meta-wayland.h
index 860395d..4610da2 100644
--- a/src/wayland/meta-wayland.h
+++ b/src/wayland/meta-wayland.h
@@ -44,5 +44,8 @@ void                    meta_wayland_compositor_set_input_focus (MetaWaylandComp
 
 void                    meta_wayland_compositor_paint_finished  (MetaWaylandCompositor *compositor);
 
+const char             *meta_wayland_get_wayland_display_name   (MetaWaylandCompositor *compositor);
+const char             *meta_wayland_get_xwayland_display_name  (MetaWaylandCompositor *compositor);
+
 #endif