function _dhtml_menu_subtree in DHTML Menu 8

Same name and namespace in other branches

1. 6.4 dhtml_menu.theme.inc \_dhtml_menu_subtree()
2. 6.3 dhtml_menu.module \_dhtml_menu_subtree()
3. 7 dhtml_menu.theme.inc \_dhtml_menu_subtree()

Traverses the menu tree and returns the sub-tree of the item indicated by the parameter.

Parameters

$item: A menu item link that must contain the keys "mlid" and "menu_name".

Return value

The tree below the menu item, or an empty array.

1 call to _dhtml_menu_subtree()

dhtml_menu_theme_menu_item in ./dhtml_menu.theme.inc

Preprocessor for menu_item. Checks whether the current item has children that were not rendered, and loads and renders them.

File

./dhtml_menu.theme.inc, line 138

dhtml_menu.theme.inc All functions related to generating the menu markup.

Code

function _dhtml_menu_subtree($item) {
  static $index = array();
  static $indexed = array();

  // This looks expensive, but menu_tree_all_data uses static caching.
  $tree = menu_tree_all_data($item['menu_name']);

  // Index the menu tree to find ancestor paths for each item.
  if (!isset($indexed[$item['menu_name']])) {
    $index += _dhtml_menu_index($tree);
    $indexed[$item['menu_name']] = TRUE;
  }

  // If the menu tree does not contain this item, stop.
  if (!isset($index[$item['mlid']])) {
    return array();
  }

  // Traverse the tree using the ancestor path.
  foreach ($index[$item['mlid']]['parents'] as $mlid) {
    $key = $index[$mlid]['key'];
    if (isset($tree[$key])) {
      $tree = $tree[$key]['below'];
    }
    else {
      return array();
    }
  }

  // Go one level further to go below the current item.
  $key = $index[$item['mlid']]['key'];
  return isset($tree[$key]) ? $tree[$key]['below'] : array();
}