[tepl] LanguageChooserWidget: use utils function to simplify select_first_row()

[Sébastien Wilmet <swilmet src gnome org>]

commit ec9f091aae57243b74881c741d21d200cb65b866
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Nov 4 12:41:55 2020 +0100

    LanguageChooserWidget: use utils function to simplify select_first_row()

 tepl/tepl-language-chooser-widget.c | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)
---
diff --git a/tepl/tepl-language-chooser-widget.c b/tepl/tepl-language-chooser-widget.c
index fdec737..f27ed5d 100644
--- a/tepl/tepl-language-chooser-widget.c
+++ b/tepl/tepl-language-chooser-widget.c
@@ -6,6 +6,7 @@
 #include "tepl-language-chooser-widget.h"
 #include <glib/gi18n-lib.h>
 #include "tepl-language-chooser.h"
+#include "tepl-utils.h"
 
 /**
  * SECTION:language-chooser-widget
@@ -35,31 +36,18 @@ static gboolean filter_cb (GtkListBoxRow *list_box_row,
                           gpointer       user_data);
 
 /* Could be moved to tepl-utils, but it would require to make it more general,
- * for all GtkListBox scenarios ideally (with headers etc). Or document the
- * limitations.
+ * for all GtkListBox scenarios ideally (with non-selectable rows, headers,
+ * etc). Or by documenting the limitations.
  */
 static void
 list_box_select_first_row (GtkListBox           *list_box,
                           GtkListBoxFilterFunc  filter_func,
                           gpointer              user_data)
 {
-       GList *all_rows;
-       GList *l;
+       GtkListBoxRow *row;
 
-       all_rows = gtk_container_get_children (GTK_CONTAINER (list_box));
-
-       for (l = all_rows; l != NULL; l = l->next)
-       {
-               GtkListBoxRow *cur_row = GTK_LIST_BOX_ROW (l->data);
-
-               if (filter_func (cur_row, user_data))
-               {
-                       gtk_list_box_select_row (list_box, cur_row);
-                       break;
-               }
-       }
-
-       g_list_free (all_rows);
+       row = tepl_utils_list_box_get_row_at_index_with_filter (list_box, 0, filter_func, user_data);
+       gtk_list_box_select_row (list_box, row);
 }
 
 static void