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<?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 emphasized 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}/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, $matches)) { |
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// if only a single whitespace or nothing is contained in an emphasis, do not consider it valid |
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if ($matches[1] === '' || $matches[1] === ' ') { |
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return [['text', $text[0]], 1]; |
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} |
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return [ |
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[ |
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'emph', |
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$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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abstract protected function parseInline($text); |
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abstract protected function renderAbsy($blocks); |
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} |
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cebe /
markdown
