leilukin-tumbleblog/includes/lib/xenocrat/markdown/inline/AutoLinkTrait.php

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2024-06-20 14:10:42 +00:00
<?php
/**
* @copyright Copyright 2014 Carsten Brandt, 2024 Daniel Pimley
* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
* @link https://github.com/xenocrat/chyrp-markdown#readme
*/
namespace xenocrat\markdown\inline;
/**
* Adds auto linking for unbracketed URLs.
*/
trait AutoLinkTrait
{
protected function parseAutoUrlMarkers(): array
{
return array('www.', 'http');
}
/**
* Parses urls and adds auto linking feature.
*
* @marker www.
* @marker http
*/
protected function parseAutoUrl($text): array
{
$regex = <<<REGEXP
/(?(R) # in case of recursion match parentheses
\(((?>[^\s()]+)|(?R))*\)
| # else match a link with title
^(www\.|https?:\/\/)(([^\s<>()]+)|(?R))+(?<![\.,:;\'"!\?\s])
)/x
REGEXP;
if (
!in_array('parseLink', $this->context)
&& preg_match($regex, $text, $matches)
) {
// Do not allow links within links.
return [
['autoUrl', $matches[0]],
strlen($matches[0])
];
}
return [['text', substr($text, 0, 4)], 4];
}
protected function renderAutoUrl($block): string
{
$href = $block[1];
$text = $href;
if (!str_starts_with($href, 'http')) {
$href = 'http://' . $href;
}
$href = $this->escapeHtmlEntities($href, ENT_COMPAT);
$decoded = rawurldecode($text);
$secured = preg_match('//u', $decoded) ? $decoded : $text;
$text = $this->escapeHtmlEntities(
$secured,
ENT_NOQUOTES | ENT_SUBSTITUTE
);
return "<a href=\"$href\">$text</a>";
}
abstract protected function escapeHtmlEntities($text, $flags = 0);
}