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