class.ilPCListItem.php

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<?php

class ilPCListItem extends ilPageContent
{
    public function init(): void
    {
        $this->setType("li");
    }

    public function newItemAfter(): void
    {
        $li = $this->getNode();
        $new_li = $this->dom->create_element("ListItem");
        if ($next_li = $li->next_sibling()) {
            $new_li = $next_li->insert_before($new_li, $next_li);
        } else {
            $parent_list = $li->parent_node();
            $new_li = $parent_list->append_child($new_li);
        }
    }


    public function newItemBefore(): void
    {
        $li = $this->getNode();
        $new_li = $this->dom->create_element("ListItem");
        $new_li = $li->insert_before($new_li, $li);
    }


    public function deleteItem(): void
    {
        $parent_node = $this->getNode()->parent_node();
        $cnt = count($parent_node->child_nodes());
        if ($cnt == 1) {
            // if list item is the last one -> delete whole list
            $grandma = $parent_node->parent_node();
            $grandma->unlink($grandma);
        } else {
            $li = $this->getNode();
            $li->unlink($li);
        }
    }

    public function moveItemDown(): void
    {
        $li = $this->getNode();
        $next = $li->next_sibling();
        $next_copy = $next->clone_node(true);
        $next_copy = $li->insert_before($next_copy, $li);
        $next->unlink($next);
    }

    public function moveItemUp(): void
    {
        $li = $this->getNode();
        $prev = $li->previous_sibling();
        $li_copy = $li->clone_node(true);
        $li_copy = $prev->insert_before($li_copy, $prev);
        $li->unlink($li);
    }
}