75 lines
2.1 KiB
PHP
75 lines
2.1 KiB
PHP
<?php namespace Todaymade\Daux\Format\HTML\ContentTypes\Markdown;
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use Highlight\Highlighter;
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use League\CommonMark\Block\Element\AbstractBlock;
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use League\CommonMark\Block\Element\FencedCode;
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use League\CommonMark\Block\Renderer\BlockRendererInterface;
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use League\CommonMark\ElementRendererInterface;
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use League\CommonMark\HtmlElement;
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use League\CommonMark\Util\Xml;
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class FencedCodeRenderer implements BlockRendererInterface
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{
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/**
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* @var Highlighter
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*/
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private $hl;
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public function __construct()
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{
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$this->hl = new Highlighter();
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}
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/**
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* @param bool $inTightList
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*
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* @return HtmlElement|string
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*/
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public function render(AbstractBlock $block, ElementRendererInterface $htmlRenderer, $inTightList = false)
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{
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if (!($block instanceof FencedCode)) {
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throw new \InvalidArgumentException('Incompatible block type: ' . get_class($block));
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}
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$attrs = [];
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foreach ($block->getData('attributes', []) as $key => $value) {
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$attrs[$key] = Xml::escape($value);
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}
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$content = $block->getStringContent();
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$language = $this->getLanguage($block->getInfoWords());
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$highlighted = false;
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if ($language) {
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$attrs['class'] = isset($attrs['class']) ? $attrs['class'] . ' ' : '';
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try {
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$highlighted = $this->hl->highlight($language, $content);
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$content = $highlighted->value;
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$attrs['class'] .= 'hljs ' . $highlighted->language;
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} catch (\Exception $e) {
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$attrs['class'] .= 'language-' . $language;
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}
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}
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if (!$highlighted) {
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$content = Xml::escape($content);
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}
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return new HtmlElement(
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'pre',
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[],
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new HtmlElement('code', $attrs, $content)
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);
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}
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public function getLanguage($infoWords)
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{
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if (count($infoWords) === 0 || strlen($infoWords[0]) === 0) {
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return false;
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}
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return Xml::escape($infoWords[0]);
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}
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}
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