public function render()
{
if (!empty($this->_items)) {
if ($this->_is_split === TRUE) {
$dropdown = new Group(Group::BUTTON_GROUP);
$dropdown->set_attributes($this->_attributes);
$dropdown->add_class('btn-group');
$dropdown->add_item($this->button);
$dropdown->add_item($this->caret);
$lists = new Lists();
$lists->set_class('dropdown-menu');
$lists->add_items($this->_items);
$dropdown->add_item($lists);
return $dropdown->render();
} else {
if ($this->caret) {
$this->button->append_label($this->caret);
}
$items[] = $this->button;
$lists = new Lists();
$lists->set_class('dropdown-menu');
$lists->add_items($this->_items);
$items[] = $lists;
return (new Tag($this->_tag, implode(PHP_EOL, $items), $this->_attributes))->render();
}
}
return NULL;
}