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vendor/cebe/markdown/inline/UrlLinkTrait.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\inline;
+
+// work around https://github.com/facebook/hhvm/issues/1120
+defined('ENT_HTML401') || define('ENT_HTML401', 0);
+
+/**
+ * Adds auto linking for URLs
+ */
+trait UrlLinkTrait
+{
+	/**
+	 * Parses urls and adds auto linking feature.
+	 * @marker http
+	 * @marker ftp
+	 */
+	protected function parseUrl($markdown)
+	{
+		$pattern = <<<REGEXP
+			/(?(R) # in case of recursion match parentheses
+				 \(((?>[^\s()]+)|(?R))*\)
+			|      # else match a link with title
+				^(https?|ftp):\/\/(([^\s()]+)|(?R))+(?<![\.,:;\'"!\?\s])
+			)/x
+REGEXP;
+
+		if (!in_array('parseLink', $this->context) && preg_match($pattern, $markdown, $matches)) {
+			return [
+				['autoUrl', $matches[0]],
+				strlen($matches[0])
+			];
+		}
+		return [['text', substr($markdown, 0, 4)], 4];
+	}
+
+	protected function renderAutoUrl($block)
+	{
+		$href = htmlspecialchars($block[1], ENT_COMPAT | ENT_HTML401, 'UTF-8');
+		$decodedUrl = urldecode($block[1]);
+		$secureUrlText = preg_match('//u', $decodedUrl) ? $decodedUrl : $block[1];
+		$text = htmlspecialchars($secureUrlText, ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8');
+		return "<a href=\"$href\">$text</a>";
+	}
+}