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<?php
declare(strict_types=1);
/*
* 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\Delimiter\Delimiter;
use League\CommonMark\Parser\Inline\InlineParserInterface;
use League\CommonMark\Parser\Inline\InlineParserMatch;
use League\CommonMark\Parser\InlineParserContext;
use League\CommonMark\Util\RegexHelper;
final class QuoteParser implements InlineParserInterface
{
public const DOUBLE_QUOTES = [Quote::DOUBLE_QUOTE, Quote::DOUBLE_QUOTE_OPENER, Quote::DOUBLE_QUOTE_CLOSER];
public const SINGLE_QUOTES = [Quote::SINGLE_QUOTE, Quote::SINGLE_QUOTE_OPENER, Quote::SINGLE_QUOTE_CLOSER];
public function getMatchDefinition(): InlineParserMatch
{
return InlineParserMatch::oneOf(...\array_merge(self::DOUBLE_QUOTES, self::SINGLE_QUOTES));
}
/**
* Normalizes any quote characters found and manually adds them to the delimiter stack
*/
public function parse(InlineParserContext $inlineContext): bool
{
$char = $inlineContext->getFullMatch();
$cursor = $inlineContext->getCursor();
$normalizedCharacter = $this->getNormalizedQuoteCharacter($char);
$charBefore = $cursor->peek(-1);
if ($charBefore === null) {
$charBefore = "\n";
}
$cursor->advance();
$charAfter = $cursor->getCurrentCharacter();
if ($charAfter === null) {
$charAfter = "\n";
}
[$leftFlanking, $rightFlanking] = $this->determineFlanking($charBefore, $charAfter);
$canOpen = $leftFlanking && ! $rightFlanking;
$canClose = $rightFlanking;
$node = new Quote($normalizedCharacter, ['delim' => true]);
$inlineContext->getContainer()->appendChild($node);
// Add entry to stack to this opener
$inlineContext->getDelimiterStack()->push(new Delimiter($normalizedCharacter, 1, $node, $canOpen, $canClose));
return true;
}
private function getNormalizedQuoteCharacter(string $character): string
{
if (\in_array($character, self::DOUBLE_QUOTES, true)) {
return Quote::DOUBLE_QUOTE;
}
if (\in_array($character, self::SINGLE_QUOTES, true)) {
return Quote::SINGLE_QUOTE;
}
return $character;
}
/**
* @return bool[]
*/
private function determineFlanking(string $charBefore, string $charAfter): array
{
$afterIsWhitespace = \preg_match('/\pZ|\s/u', $charAfter);
$afterIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charAfter);
$beforeIsWhitespace = \preg_match('/\pZ|\s/u', $charBefore);
$beforeIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charBefore);
$leftFlanking = ! $afterIsWhitespace &&
! ($afterIsPunctuation &&
! $beforeIsWhitespace &&
! $beforeIsPunctuation);
$rightFlanking = ! $beforeIsWhitespace &&
! ($beforeIsPunctuation &&
! $afterIsWhitespace &&
! $afterIsPunctuation);
return [$leftFlanking, $rightFlanking];
}
}
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