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<?php |
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declare(strict_types=1); |
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namespace League\CommonMark\Delimiter; |
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use League\CommonMark\Delimiter\Processor\DelimiterProcessorCollection; |
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use League\CommonMark\Delimiter\Processor\DelimiterProcessorInterface; |
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use League\CommonMark\Node\Inline\Text; |
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use League\CommonMark\Parser\Inline\InlineParserInterface; |
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use League\CommonMark\Parser\Inline\InlineParserMatch; |
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use League\CommonMark\Parser\InlineParserContext; |
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use League\CommonMark\Util\RegexHelper; |
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/** |
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* Delimiter parsing is implemented as an Inline Parser with the lowest-possible priority |
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* |
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* @internal |
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*/ |
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final class DelimiterParser implements InlineParserInterface |
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{ |
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private DelimiterProcessorCollection $collection; |
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2148 |
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public function __construct(DelimiterProcessorCollection $collection) |
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{ |
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2148 |
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$this->collection = $collection; |
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} |
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2138 |
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public function getMatchDefinition(): InlineParserMatch |
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{ |
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2138 |
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return InlineParserMatch::oneOf(...$this->collection->getDelimiterCharacters()); |
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} |
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public function parse(InlineParserContext $inlineContext): bool |
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{ |
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$character = $inlineContext->getFullMatch(); |
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$numDelims = 0; |
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$cursor = $inlineContext->getCursor(); |
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$processor = $this->collection->getDelimiterProcessor($character); |
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if ($processor === null) { |
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throw new \LogicException('Delimiter processor should never be null here'); |
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} |
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$charBefore = $cursor->peek(-1); |
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if ($charBefore === null) { |
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$charBefore = "\n"; |
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} |
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while ($cursor->peek($numDelims) === $character) { |
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++$numDelims; |
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} |
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if ($numDelims < $processor->getMinLength()) { |
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return false; |
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} |
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$cursor->advanceBy($numDelims); |
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$charAfter = $cursor->getCurrentCharacter(); |
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510 |
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if ($charAfter === null) { |
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$charAfter = "\n"; |
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} |
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[$canOpen, $canClose] = self::determineCanOpenOrClose($charBefore, $charAfter, $character, $processor); |
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$node = new Text(\str_repeat($character, $numDelims), [ |
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'delim' => true, |
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]); |
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$inlineContext->getContainer()->appendChild($node); |
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// Add entry to stack to this opener |
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if ($canOpen || $canClose) { |
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$delimiter = new Delimiter($character, $numDelims, $node, $canOpen, $canClose); |
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$inlineContext->getDelimiterStack()->push($delimiter); |
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} |
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return true; |
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} |
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/** |
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* @return bool[] |
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*/ |
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private static function determineCanOpenOrClose(string $charBefore, string $charAfter, string $character, DelimiterProcessorInterface $delimiterProcessor): array |
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{ |
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$afterIsWhitespace = \preg_match(RegexHelper::REGEX_UNICODE_WHITESPACE_CHAR, $charAfter); |
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$afterIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charAfter); |
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$beforeIsWhitespace = \preg_match(RegexHelper::REGEX_UNICODE_WHITESPACE_CHAR, $charBefore); |
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$beforeIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charBefore); |
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$leftFlanking = ! $afterIsWhitespace && (! $afterIsPunctuation || $beforeIsWhitespace || $beforeIsPunctuation); |
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510 |
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$rightFlanking = ! $beforeIsWhitespace && (! $beforeIsPunctuation || $afterIsWhitespace || $afterIsPunctuation); |
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510 |
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if ($character === '_') { |
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$canOpen = $leftFlanking && (! $rightFlanking || $beforeIsPunctuation); |
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$canClose = $rightFlanking && (! $leftFlanking || $afterIsPunctuation); |
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} else { |
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$canOpen = $leftFlanking && $character === $delimiterProcessor->getOpeningCharacter(); |
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$canClose = $rightFlanking && $character === $delimiterProcessor->getClosingCharacter(); |
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} |
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return [$canOpen, $canClose]; |
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} |
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} |
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thephpleague /
commonmark
