<?php
/**
* @package s9e\TextFormatter
* @copyright Copyright (c) 2010-2021 The s9e authors
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Plugins\Autolink;
use s9e\TextFormatter\Plugins\ParserBase;
class Parser extends ParserBase
{
/**
* {@inheritdoc}
*/
public function parse($text, array $matches)
{
foreach ($matches as $m)
{
// Linkify the trimmed URL
$this->linkifyUrl($m[0][1], $this->trimUrl($m[0][0]));
}
}
/**
* Linkify given URL at given position
*
* @param integer $tagPos URL's position in the text
* @param string $url URL
* @return void
*/
protected function linkifyUrl($tagPos, $url)
{
// Create a zero-width end tag right after the URL
$endPos = $tagPos + strlen($url);
$endTag = $this->parser->addEndTag($this->config['tagName'], $endPos, 0);
// If the URL starts with "www." we prepend "http://"
if ($url[3] === '.')
{
$url = 'http://' . $url;
}
// Create a zero-width start tag right before the URL, with a slightly worse priority to
// allow specialized plugins to use the URL instead
$startTag = $this->parser->addStartTag($this->config['tagName'], $tagPos, 0, 1);
$startTag->setAttribute($this->config['attrName'], $url);
// Pair the tags together
$startTag->pairWith($endTag);
// Protect the tag's content from partial replacements with a low priority tag
$contentTag = $this->parser->addVerbatim($tagPos, $endPos - $tagPos, 1000);
$startTag->cascadeInvalidationTo($contentTag);
}
/**
* Remove trailing punctuation from given URL
*
* We remove most ASCII non-letters and Unicode punctuation from the end of the string.
* Exceptions:
* - dashes and underscores, (base64 IDs could end with one)
* - equal signs, (because of "foo?bar=")
* - plus signs, (used by some file share services to force download)
* - trailing slashes,
* - closing parentheses. (they are balanced separately)
*
* @param string $url Original URL
* @return string Trimmed URL
*/
protected function trimUrl($url)
{
return preg_replace('#(?:(?![-=+)/_])[\\s!-.:-@[-`{-~\\pP])+$#Du', '', $url);
}
}