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