function _dhtml_menu_subtree in DHTML Menu 7

Same name and namespace in other branches

1. 8 dhtml_menu.theme.inc \_dhtml_menu_subtree()
2. 6.4 dhtml_menu.theme.inc \_dhtml_menu_subtree()
3. 6.3 dhtml_menu.module \_dhtml_menu_subtree()

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

Parameters

$menu_name: The internal name of the menu.

$mlid: The menu link ID.

Return value

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

1 call to _dhtml_menu_subtree()

dhtml_menu_preprocess_menu_link in ./dhtml_menu.theme.inc

Preprocessor for menu_link. Adds the required HTML attributes and loads subtrees if necessary.

File

./dhtml_menu.theme.inc, line 85

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

Code

function _dhtml_menu_subtree($menu_name, $mlid) {
  static $index = array();
  static $indexed = array();

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

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

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

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

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