[gtk+] range: Add private api to get the trough node

[Matthias Clasen <matthiasc src gnome org>]

commit 973836d395a481bca46eda37d4df6e9ea9bd2156
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Nov 5 06:47:10 2015 -0500

    range: Add private api to get the trough node
    
    This will be needed in range subclasses to position their
    own subnodes.

 gtk/gtkrange.c        |    6 ++++++
 gtk/gtkrangeprivate.h |    3 +++
 2 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index 3abf0cc..ceecafa 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -4317,3 +4317,9 @@ _gtk_range_set_steppers (GtkRange *range,
 
   gtk_widget_queue_resize (GTK_WIDGET (range));
 }
+
+GtkCssNode *
+gtk_range_get_trough_node (GtkRange *range)
+{
+  return range->priv->trough_node;
+}
diff --git a/gtk/gtkrangeprivate.h b/gtk/gtkrangeprivate.h
index 52512ef..1ce5219 100644
--- a/gtk/gtkrangeprivate.h
+++ b/gtk/gtkrangeprivate.h
@@ -27,6 +27,7 @@
 
 
 #include <gtk/gtkrange.h>
+#include <gtk/gtkcssnodeprivate.h>
 
 
 G_BEGIN_DECLS
@@ -47,6 +48,8 @@ void               _gtk_range_set_steppers                 (GtkRange      *range
                                                             gboolean       has_c,
                                                             gboolean       has_d);
 
+GtkCssNode        *gtk_range_get_trough_node (GtkRange *range);
+
 G_END_DECLS