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<?php
namespace League\HTMLToMarkdown\Converter;
use League\HTMLToMarkdown\ElementInterface;
class PreformattedConverter implements ConverterInterface
{
/**
* @param ElementInterface $element
*
* @return string
*/
public function convert(ElementInterface $element)
{
$pre_content = html_entity_decode($element->getChildrenAsString());
$pre_content = str_replace(array('<pre>', '</pre>'), '', $pre_content);
/*
* Checking for the code tag.
* Usually pre tags are used along with code tags. This conditional will check for already converted code tags,
* which use backticks, and if those backticks are at the beginning and at the end of the string it means
* there's no more information to convert.
*/
$firstBacktick = strpos(trim($pre_content), '`');
$lastBacktick = strrpos(trim($pre_content), '`');
if ($firstBacktick === 0 && $lastBacktick === strlen(trim($pre_content)) - 1) {
return $pre_content . "\n\n";
}
// If the execution reaches this point it means it's just a pre tag, with no code tag nested
// Empty lines are a special case
if ($pre_content === '') {
return "```\n```\n\n";
}
// Normalizing new lines
$pre_content = preg_replace('/\r\n|\r|\n/', "\n", $pre_content);
// Ensure there's a newline at the end
if (strrpos($pre_content, "\n") !== strlen($pre_content) - strlen("\n")) {
$pre_content .= "\n";
}
// Use three backticks
return "```\n" . $pre_content . "```\n\n";
}
/**
* @return string[]
*/
public function getSupportedTags()
{
return array('pre');
}
}
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