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<?php
/**
* @copyright Copyright (c) 2014 Carsten Brandt
* @license https://github.com/cebe/markdown/blob/master/LICENSE
* @link https://github.com/cebe/markdown#readme
*/
namespace cebe\markdown\block;
/**
* Adds the fenced code blocks
*
* automatically included 4 space indented code blocks
*/
trait FencedCodeTrait
{
use CodeTrait;
/**
* identify a line as the beginning of a fenced code block.
*/
protected function identifyFencedCode($line)
{
return ($line[0] === '`' && strncmp($line, '```', 3) === 0) ||
($line[0] === '~' && strncmp($line, '~~~', 3) === 0) ||
(isset($line[3]) && (
($line[3] === '`' && strncmp(ltrim($line), '```', 3) === 0) ||
($line[3] === '~' && strncmp(ltrim($line), '~~~', 3) === 0)
));
}
/**
* Consume lines for a fenced code block
*/
protected function consumeFencedCode($lines, $current)
{
$line = ltrim($lines[$current]);
$fence = substr($line, 0, $pos = strrpos($line, $line[0]) + 1);
$language = rtrim(substr($line, $pos));
// consume until end fence
$content = [];
for ($i = $current + 1, $count = count($lines); $i < $count; $i++) {
if (($pos = strpos($line = $lines[$i], $fence)) === false || $pos > 3) {
$content[] = $line;
} else {
break;
}
}
$block = [
'code',
'content' => implode("\n", $content),
];
if (!empty($language)) {
$block['language'] = $language;
}
return [$block, $i];
}
}