wayland: Return a display name

Make gdk_screen_make_display_name() return a likely correct
name for the Wayland socket we are using.

diff --git a/gdk/wayland/gdkscreen-wayland.c b/gdk/wayland/gdkscreen-wayland.c
index b07483bc697ae377d743a4f490fccc63973003cc..ee95107fb2316b5df1249010528f118b812ac61b 100644 (file)
--- a/gdk/wayland/gdkscreen-wayland.c
+++ b/gdk/wayland/gdkscreen-wayland.c
@@ -301,7 +301,13 @@ gdk_wayland_screen_is_composited (GdkScreen *screen)
 static gchar *
 gdk_wayland_screen_make_display_name (GdkScreen *screen)
 {
-  return NULL;
+  const gchar *name;
+
+  name = g_getenv ("WAYLAND_DISPLAY");
+  if (name == NULL)
+    name = "wayland-0";
+
+  return g_strdup (name);
 }
 
 static GdkWindow *