Viewing file:  PunctuationParser.php (2.15 KB) -rw-r--r--
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<?php
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* Original code based on the CommonMark JS reference parser (http://bitly.com/commonmark-js)
* - (c) John MacFarlane
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\SmartPunct;
use League\CommonMark\Inline\Element\Text;
use League\CommonMark\Inline\Parser\InlineParserInterface;
use League\CommonMark\InlineParserContext;
final class PunctuationParser implements InlineParserInterface
{
/**
* @return string[]
*/
public function getCharacters(): array
{
return ['-', '.'];
}
public function parse(InlineParserContext $inlineContext): bool
{
$cursor = $inlineContext->getCursor();
$ch = $cursor->getCharacter();
// Ellipses
if ($ch === '.' && $matched = $cursor->match('/^\\.( ?\\.)\\1/')) {
$inlineContext->getContainer()->appendChild(new Text('…'));
return true;
}
// Em/En-dashes
elseif ($ch === '-' && $matched = $cursor->match('/^(?<!-)(-{2,})/')) {
$count = strlen($matched);
$en_dash = '–';
$en_count = 0;
$em_dash = '—';
$em_count = 0;
if ($count % 3 === 0) { // If divisible by 3, use all em dashes
$em_count = $count / 3;
} elseif ($count % 2 === 0) { // If divisible by 2, use all en dashes
$en_count = $count / 2;
} elseif ($count % 3 === 2) { // If 2 extra dashes, use en dash for last 2; em dashes for rest
$em_count = ($count - 2) / 3;
$en_count = 1;
} else { // Use en dashes for last 4 hyphens; em dashes for rest
$em_count = ($count - 4) / 3;
$en_count = 2;
}
$inlineContext->getContainer()->appendChild(new Text(
str_repeat($em_dash, $em_count) . str_repeat($en_dash, $en_count)
));
return true;
}
return false;
}
}
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