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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (http://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Extension\SmartPunct; |
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use League\CommonMark\Inline\Element\Text; |
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use League\CommonMark\Inline\Parser\InlineParserInterface; |
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use League\CommonMark\InlineParserContext; |
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class PunctuationParser implements InlineParserInterface |
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{ |
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/** |
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* @return string[] |
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*/ |
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public function getCharacters(): array |
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{ |
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return ['-', '.']; |
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} |
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/** |
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* @param InlineParserContext $inlineContext |
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* |
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* @return bool |
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*/ |
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public function parse(InlineParserContext $inlineContext): bool |
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{ |
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$cursor = $inlineContext->getCursor(); |
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$ch = $cursor->getCharacter(); |
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// Ellipses |
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if ($ch === '.' && $matched = $cursor->match('/^\\.( ?\\.)\\1/')) { |
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$inlineContext->getContainer()->appendChild(new Text('…')); |
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return true; |
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} |
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// Em/En-dashes |
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elseif ($ch === '-' && $matched = $cursor->match('/^(?<!-)(-{2,})/')) { |
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$count = strlen($matched); |
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$en_dash = '–'; |
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$en_count = 0; |
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$em_dash = '—'; |
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$em_count = 0; |
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if ($count % 3 === 0) { // If divisible by 3, use all em dashes |
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$em_count = $count / 3; |
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} elseif ($count % 2 === 0) { // If divisible by 2, use all en dashes |
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$en_count = $count / 2; |
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} elseif ($count % 3 === 2) { // If 2 extra dashes, use en dash for last 2; em dashes for rest |
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$em_count = ($count - 2) / 3; |
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$en_count = 1; |
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} else { // Use en dashes for last 4 hyphens; em dashes for rest |
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$em_count = ($count - 4) / 3; |
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$en_count = 2; |
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} |
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$inlineContext->getContainer()->appendChild(new Text( |
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str_repeat($em_dash, $em_count) . str_repeat($en_dash, $en_count) |
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)); |
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return true; |
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} |
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return false; |
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} |
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} |
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thephpleague /
commonmark
