crm.fsf.org/20131203/files/sites/all/modules-old/views/modules/book/views_plugin_argument_default_book_root.inc

   1 <?php
   2 /**
   3  * @file
   4  * Contains the book root from current node argument default plugin.
   5  */
   6
   7 /**
   8  * Default argument plugin to get the current node's book root.
   9  */
  10 class views_plugin_argument_default_book_root extends views_plugin_argument_default_node {
  11   function get_argument() {
  12     // Use the argument_default_node plugin to get the nid argument.
  13     $nid = parent::get_argument();
  14     if (!empty($nid)) {
  15       $node = node_load($nid);
  16       if (isset($node->book['bid'])) {
  17         return $node->book['bid'];
  18       }
  19     }
  20   }
  21 }