places sidebar: Add private api to get title

The places sidebar already does all the work to determine the
right label to use for the current location of the filechooser.
We want to use the same label in the headerbar subtitle, so
add some private API to get it.

gtk/gtkplacessidebar.c

@@ -4416,6 +4416,23 @@ gtk_places_sidebar_get_location (GtkPlacesSidebar *sidebar)
   return file;
 }
 
+gchar *
+gtk_places_sidebar_get_location_title (GtkPlacesSidebar *sidebar)
+{
+  GtkListBoxRow *selected;
+  gchar *title;
+
+  g_return_val_if_fail (sidebar != NULL, NULL);
+
+  title = NULL;
+  selected = gtk_list_box_get_selected_row (GTK_LIST_BOX (sidebar->list_box));
+
+  if (selected)
+    g_object_get (selected, "label", &title, NULL);
+
+  return title;
+}
+
 /**
  * gtk_places_sidebar_set_show_recent:
  * @sidebar: a places sidebar

gtk/gtkplacessidebarprivate.h

@@ -22,6 +22,7 @@
 #define __GTK_PLACES_SIDEBAR_PRIVATE_H__
 
 #include <glib.h>
+#include "gtkplacessidebar.h"
 
 G_BEGIN_DECLS
 
@@ -49,6 +50,8 @@ typedef enum {
   N_PLACES
 } GtkPlacesSidebarPlaceType;
 
+gchar *gtk_places_sidebar_get_location_title (GtkPlacesSidebar *sidebar);
+
 G_END_DECLS
 
 #endif /* __GTK_PLACES_SIDEBAR_PRIVATE_H__ */