[ticket/11768] This commit integrates s9e\TextFormatter

This commit integrates s9e\TextFormatter as outlined in
http://area51.phpbb.com/phpBB/viewtopic.php?f=108&t=44467

PHPBB3-11768

phpBB/phpbb/textformatter/s9e/utils.php

@@ -0,0 +1,67 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+/**
+* Text manipulation utilities
+* @package phpBB3
+*/
+class utils extends \phpbb\textformatter\utils
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function clean_formatting($text)
+	{
+		// Insert a space before <s> and <e> then remove formatting
+		$text = preg_replace('#<[es]>#', ' $0', $text);
+
+		return \s9e\TextFormatter\Unparser::removeFormatting($text);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function remove_bbcode($text, $bbcode_name, $depth = 0)
+	{
+		$dom = new \DOMDocument;
+		$dom->loadXML($text);
+
+		$xpath = new \DOMXPath($dom);
+		$nodes = $xpath->query(str_repeat('//' . strtoupper($bbcode_name), 1 + $depth));
+
+		foreach ($nodes as $node)
+		{
+			$node->parentNode->removeChild($node);
+		}
+
+		return $dom->saveXML($dom->documentElement);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function remove_formatting($text)
+	{
+		return \s9e\TextFormatter\Unparser::removeFormatting($text);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function unparse($text)
+	{
+		return \s9e\TextFormatter\Unparser::unparse($text);
+	}
+}