mirror of https://github.com/friendica/friendica
63 lines
2.0 KiB
PHP
63 lines
2.0 KiB
PHP
<?php
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namespace League\HTMLToMarkdown\Converter;
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use League\HTMLToMarkdown\ElementInterface;
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class CodeConverter implements ConverterInterface
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{
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/**
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* @param ElementInterface $element
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*
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* @return string
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*/
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public function convert(ElementInterface $element)
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{
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$language = null;
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// Checking for language class on the code block
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$classes = $element->getAttribute('class');
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if ($classes) {
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// Since tags can have more than one class, we need to find the one that starts with 'language-'
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$classes = explode(' ', $classes);
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foreach ($classes as $class) {
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if (strpos($class, 'language-') !== false) {
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// Found one, save it as the selected language and stop looping over the classes.
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// The space after the language avoids gluing the actual code with the language tag
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$language = str_replace('language-', '', $class) . ' ';
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break;
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}
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}
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}
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$markdown = '';
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$code = html_entity_decode($element->getChildrenAsString());
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// In order to remove the code tags we need to search for them and, in the case of the opening tag
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// use a regular expression to find the tag and the other attributes it might have
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$code = preg_replace('/<code\b[^>]*>/', '', $code);
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$code = str_replace('</code>', '', $code);
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// Checking if the code has multiple lines
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$lines = preg_split('/\r\n|\r|\n/', $code);
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if (count($lines) > 1) {
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// Multiple lines detected, adding three backticks and newlines
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$markdown .= '```' . $language . "\n" . $code . "\n" . '```';
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} else {
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// One line of code, wrapping it on one backtick.
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$markdown .= '`' . $language . $code . '`';
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}
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return $markdown;
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}
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/**
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* @return string[]
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*/
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public function getSupportedTags()
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{
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return array('code');
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}
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}
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