1<?php
2
3/*
4 * This file is part of the clockoon/dokuwiki-commonmark-plugin package.
5 *
6 * (c) Sungbin Jeon <clockoon@gmail.com>
7 *
8 * Original code based on the followings:
9 * - CommonMark JS reference parser (https://bitly.com/commonmark-js) (c) John MacFarlane
10 * - league/commonmark (https://github.com/thephpleague/commonmark) (c) Colin O'Dell <colinodell@gmail.com>
11 *
12 * For the full copyright and license information, please view the LICENSE
13 * file that was distributed with this source code.
14 */
15
16namespace DokuWiki\Plugin\Commonmark\Extension\Renderer\Block;
17
18use League\CommonMark\Block\Element\AbstractBlock;
19use League\CommonMark\Block\Element\ListItem;
20use League\CommonMark\Block\Element\Paragraph;
21use League\CommonMark\ElementRendererInterface;
22use League\CommonMark\Extension\TaskList\TaskListItemMarker;
23use League\CommonMark\Block\Renderer\BlockRendererInterface;
24
25final class ListItemRenderer implements BlockRendererInterface
26{
27    /**
28     * @param ListItem                 $block
29     * @param ElementRendererInterface $DWRenderer
30     * @param bool                     $inTightList
31     *
32     * @return string
33     */
34    public function render(AbstractBlock $block, ElementRendererInterface $DWRenderer, bool $inTightList = false)
35    {
36        if (!($block instanceof ListItem)) {
37            throw new \InvalidArgumentException('Incompatible block type: ' . \get_class($block));
38        }
39
40        $result = $DWRenderer->renderBlocks($block->children(), $inTightList);
41        if (\substr($result, 0, 1) === '<' && !$this->startsTaskListItem($block)) {
42            $result = "\n" . $result;
43        }
44        if (\substr($result, -1, 1) === '>') {
45            $result .= "\n";
46        }
47
48        $result = preg_replace('/\n\n/', "\n", $result); # remove unwanted newline for DW
49
50        return "<li>" . $result;
51    }
52
53    private function startsTaskListItem(ListItem $block): bool
54    {
55        $firstChild = $block->firstChild();
56
57        return $firstChild instanceof Paragraph && $firstChild->firstChild() instanceof TaskListItemMarker;
58    }
59}
60