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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\TableOfContents\Normalizer;
use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
use League\CommonMark\Extension\TableOfContents\Node\TableOfContents;
final class RelativeNormalizerStrategy implements NormalizerStrategyInterface
{
/** @psalm-readonly */
private TableOfContents $toc;
/**
* @var array<int, ListItem>
*
* @psalm-readonly-allow-private-mutation
*/
private array $listItemStack = [];
public function __construct(TableOfContents $toc)
{
$this->toc = $toc;
}
public function addItem(int $level, ListItem $listItemToAdd): void
{
$previousLevel = \array_key_last($this->listItemStack);
// Pop the stack if we're too deep
while ($previousLevel !== null && $level < $previousLevel) {
\array_pop($this->listItemStack);
$previousLevel = \array_key_last($this->listItemStack);
}
$lastListItem = \end($this->listItemStack);
// Need to go one level deeper? Add that level
if ($lastListItem !== false && $level > $previousLevel) {
$targetListBlock = new ListBlock($lastListItem->getListData());
$targetListBlock->setStartLine($listItemToAdd->getStartLine());
$targetListBlock->setEndLine($listItemToAdd->getEndLine());
$lastListItem->appendChild($targetListBlock);
// Otherwise we're at the right level
// If there's no stack we're adding this item directly to the TOC element
} elseif ($lastListItem === false) {
$targetListBlock = $this->toc;
// Otherwise add it to the last list item
} else {
$targetListBlock = $lastListItem->parent();
}
$targetListBlock->appendChild($listItemToAdd);
$this->listItemStack[$level] = $listItemToAdd;
}
}
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