[gtk+] Add private GtkWidget api for action groups

[Matthias Clasen <matthiasc src gnome org>]

commit 3f224a716513f3bc12112931abc95eca940e9dac
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue May 13 20:28:44 2014 -0400

    Add private GtkWidget api for action groups
    
    Similar to the just-added action muxer api for enumerating
    action prefixes and for getting the action group for a
    prefix.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730095

 gtk/gtkwidget.c        |   17 +++++++++++++++++
 gtk/gtkwidgetprivate.h |    3 +++
 2 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 3528e40..a7a94d9 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -16252,3 +16252,20 @@ gtk_widget_get_template_child (GtkWidget   *widget,
 
   return ret;
 }
+
+gchar **
+_gtk_widget_list_action_prefixes (GtkWidget *widget)
+{
+  if (widget->priv->muxer)
+    return gtk_action_muxer_list_prefixes (widget->priv->muxer);
+  return NULL;
+}
+
+GActionGroup *
+_gtk_widget_get_action_group (GtkWidget   *widget,
+                              const gchar *prefix)
+{
+  if (widget->priv->muxer)
+    return gtk_action_muxer_lookup (widget->priv->muxer, prefix);
+  return NULL;
+}
diff --git a/gtk/gtkwidgetprivate.h b/gtk/gtkwidgetprivate.h
index 7cf15f8..6e8bb47 100644
--- a/gtk/gtkwidgetprivate.h
+++ b/gtk/gtkwidgetprivate.h
@@ -148,6 +148,9 @@ void              _gtk_widget_style_context_invalidated    (GtkWidget    *widget
 
 void              _gtk_widget_update_parent_muxer          (GtkWidget    *widget);
 GtkActionMuxer *  _gtk_widget_get_action_muxer             (GtkWidget    *widget);
+gchar **          _gtk_widget_list_action_prefixes         (GtkWidget    *widget);
+GActionGroup *    _gtk_widget_get_action_group             (GtkWidget    *widget,
+                                                            const gchar  *prefix);
 
 G_END_DECLS