/** * Renders menu tree. Internal method. * * @param ioMenuItem $item Menu item * @param integer $depth The depth of children to render * @param boolean $renderAsChild Render with attributes on the li (true) or the ul around the children (false) * * @return string */ protected function _render(ioMenuItem $item, $depth = null, $renderAsChild = false) { /** * Return an empty string if any of the following are true: * a) The menu has no children eligible to be displayed * b) The depth is 0 * c) This menu item has been explicitly set to hide its children */ if (!$item->hasChildren() || $depth === 0 || !$item->showChildren()) { return; } if ($renderAsChild) { $attributes = array('class' => 'menu_level_' . $item->getLevel()); } else { $attributes = $item->getAttributes(); // give the top ul a class of "menu" of none specified if (!isset($attributes['class'])) { $attributes['class'] = 'menu'; } } // render children with a depth - 1 $childDepth = $depth === null ? null : $depth - 1; $html = $this->_format($item->getLevel(), '<ul' . _tag_options($attributes) . '>', 'ul'); $html .= $this->_renderChildren($item, $childDepth); $html .= $this->_format($item->getLevel(), '</ul>', 'ul'); return $html; }