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