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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)
{
// Store the content of the code block in an array, one entry for each line
$markdown = '';
$code_content = html_entity_decode($element->getChildrenAsString());
$code_content = str_replace(array('<code>', '</code>'), '', $code_content);
$code_content = str_replace(array('<pre>', '</pre>'), '', $code_content);
$lines = preg_split('/\r\n|\r|\n/', $code_content);
$total = count($lines);
// If there's more than one line of code, prepend each line with four spaces and no backticks.
if ($total > 1 || $element->getTagName() === 'pre') {
// Remove the first and last line if they're empty
$first_line = trim($lines[0]);
$last_line = trim($lines[$total - 1]);
$first_line = trim($first_line, '&#xD;'); //trim XML style carriage returns too
$last_line = trim($last_line, '&#xD;');
if (empty($first_line)) {
array_shift($lines);
}
if (empty($last_line)) {
array_pop($lines);
}
$count = 1;
foreach ($lines as $line) {
$line = str_replace('&#xD;', '', $line);
$markdown .= ' ' . $line;
// Add newlines, except final line of the code
if ($count !== $total) {
$markdown .= "\n";
}
$count++;
}
$markdown .= "\n";
} else {
// There's only one line of code. It's a code span, not a block. Just wrap it with backticks.
$markdown .= '`' . $lines[0] . '`';
}
if ($element->getTagName() === 'pre') {
$markdown = "\n" . $markdown . "\n";
}
return $markdown;
}
/**
* @return string[]
*/
public function getSupportedTags()
{
return array('pre', 'code');
}
}