Display parent terms (if existing) for each taxonomy term when editing grants

Hello,

Here's another suggestion for the TAC configuration (Administration > Configuration > Taxonomy access control), but I'm not sure it is the best way to do it :

For example, if I got the vocabulary "Video game", containing the following terms tree :

• Role Playing Game
  • Under 12 years old
  • Under 18 years old
  • 18 years old and more
• Strategy Game
  • Under 12 years old
  • Under 18 years old
  • 18 years old and more

when editing TAC for a role, I see the "Video game" terms, but without their parent terms : I see 2 times "Under 12 years old", but without knowing which one refers to Role Playing Game and which one to Strategy Game.

A piece of PHP which works, but I'm not sure it's the best :
in taxonomy_access.admin.inc, function theme_taxonomy_access_admin_form() :

<?php
foreach (array_keys($form['vocabs']) as $vid) {
  if (is_numeric($vid) AND isset($form['grants'][$vid])) {
    $row = $sub_header;
    $row[0] = array('data' => '<h3>' . check_plain($form['vocabs'][$vid]['#title']) . '</h3>', 'colspan' => 3);
    $rows[] = $row;
    foreach (array_keys($form['grants'][$vid]) as $tid) {
      if (is_numeric($tid)) {
        $select_key = $tid? 'selected_terms' : 'selected_defaults';
        $select_id = $tid? $tid : $vid;
        /**
         * suggestion - BEGINNING
         */
        if (!empty($tid)) {
          $_taxoParents = taxonomy_get_parents_all($tid);
          if (isset($_taxoParents[0])) unset($_taxoParents[0]);
          if (count($_taxoParents) > 0) {
            foreach ($_taxoParents as $_taxoParent) {
              $form[$select_key][$select_id]['#title'] = $_taxoParent->name . ' > ' . str_replace('&nbsp;', '', $form[$select_key][$select_id]['#title']);
            }
          }
        }
        /**
         * suggestion - END
         */
        $row = array(
          array('data' => drupal_render($form[$select_key][$select_id]), 'colspan' => 3),
        );
        // et cetera
      }
    }
  }
}
?>

What do you think about that ?