81 lines
2.1 KiB
PHP
81 lines
2.1 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2014 Carsten Brandt
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* @license https://github.com/cebe/markdown/blob/master/LICENSE
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* @link https://github.com/cebe/markdown#readme
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*/
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namespace cebe\markdown\inline;
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/**
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* Adds inline emphasizes and strong elements
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*/
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trait EmphStrongTrait
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{
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/**
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* Parses empathized and strong elements.
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* @marker _
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* @marker *
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*/
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protected function parseEmphStrong($text)
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{
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$marker = $text[0];
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if (!isset($text[1])) {
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return [['text', $text[0]], 1];
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}
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if ($marker == $text[1]) { // strong
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// work around a PHP bug that crashes with a segfault on too much regex backtrack
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// check whether the end marker exists in the text
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// https://github.com/erusev/parsedown/issues/443
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// https://bugs.php.net/bug.php?id=45735
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if (strpos($text, $marker . $marker, 2) === false) {
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return [['text', $text[0] . $text[1]], 2];
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}
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if ($marker == '*' && preg_match('/^[*]{2}((?:[^*]|[*][^*]*[*])+?)[*]{2}(?![*]{2})/s', $text, $matches) ||
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$marker == '_' && preg_match('/^__((?:[^_]|_[^_]*_)+?)__(?!__)/us', $text, $matches)) {
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return [
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[
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'strong',
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$this->parseInline($matches[1]),
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],
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strlen($matches[0])
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];
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}
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} else { // emph
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// work around a PHP bug that crashes with a segfault on too much regex backtrack
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// check whether the end marker exists in the text
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// https://github.com/erusev/parsedown/issues/443
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// https://bugs.php.net/bug.php?id=45735
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if (strpos($text, $marker, 1) === false) {
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return [['text', $text[0]], 1];
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}
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if ($marker == '*' && preg_match('/^[*]((?:[^*]|[*][*][^*]+?[*][*])+?)[*](?![*][^*])/s', $text, $matches) ||
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$marker == '_' && preg_match('/^_((?:[^_]|__[^_]*__)+?)_(?!_[^_])\b/us', $text, $matches)) {
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return [
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[
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'emph',
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$this->parseInline($matches[1]),
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],
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strlen($matches[0])
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];
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}
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}
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return [['text', $text[0]], 1];
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}
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protected function renderStrong($block)
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{
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return '<strong>' . $this->renderAbsy($block[1]) . '</strong>';
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}
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protected function renderEmph($block)
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{
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return '<em>' . $this->renderAbsy($block[1]) . '</em>';
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}
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}
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