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