r2c/system/src/Grav/Common/Twig/Node/TwigNodeMarkdown.php

<?php
/**
 * @package    Grav.Common.Twig
 *
 * @copyright  Copyright (C) 2015 - 2018 Trilby Media, LLC. All rights reserved.
 * @license    MIT License; see LICENSE file for details.
 */

namespace Grav\Common\Twig\Node;

class TwigNodeMarkdown extends \Twig_Node implements \Twig_NodeOutputInterface
{
    public function __construct(\Twig_Node $body, $lineno, $tag = 'markdown')
    {
        parent::__construct(['body' => $body], [], $lineno, $tag);
    }
    /**
     * Compiles the node to PHP.
     *
     * @param \Twig_Compiler A Twig_Compiler instance
     */
    public function compile(\Twig_Compiler $compiler)
    {
        $compiler
            ->addDebugInfo($this)
            ->write('ob_start();' . PHP_EOL)
            ->subcompile($this->getNode('body'))
            ->write('$content = ob_get_clean();' . PHP_EOL)
            ->write('preg_match("/^\s*/", $content, $matches);' . PHP_EOL)
            ->write('$lines = explode("\n", $content);' . PHP_EOL)
            ->write('$content = preg_replace(\'/^\' . $matches[0]. \'/\', "", $lines);' . PHP_EOL)
            ->write('$content = join("\n", $content);' . PHP_EOL)
            ->write('echo $this->env->getExtension(\'Grav\Common\Twig\TwigExtension\')->markdownFunction($content);' . PHP_EOL);
    }
}