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vendor/cebe/markdown/block/FencedCodeTrait.php

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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];
+	}
+}