public function draggableviews_hierarchy_handler_book::get_depth in DraggableViews 7.2

File

draggableviews_book/handlers/draggableviews_hierarchy_handler_book.inc, line 25

Class

draggableviews_hierarchy_handler_book

Code

public function get_depth($field, $index) {
  $row = $field->view->result[$index];

  // Cache depth of the top parent so we do not recalculate it.
  static $parent_depth;
  if (is_null($parent_depth)) {
    $parent_mlid = $row->draggableviews_book_plid;
    $parent_depth = db_query('SELECT depth FROM {menu_links} WHERE mlid = :mlid', array(
      ':mlid' => $parent_mlid,
    ))
      ->fetchField() + 1;
  }
  return isset($row->draggableviews_book_depth) ? $row->draggableviews_book_depth - $parent_depth : 0;
}