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<?php |
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declare(strict_types=1); |
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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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* 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\CommonMark\Parser\Block; |
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use League\CommonMark\Parser\Block\BlockStart; |
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use League\CommonMark\Parser\Block\BlockStartParserInterface; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Parser\MarkdownParserStateInterface; |
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use League\CommonMark\Util\RegexHelper; |
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class HeadingStartParser implements BlockStartParserInterface |
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{ |
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2187 |
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public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart |
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{ |
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2187 |
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if ($cursor->isIndented()) { |
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return BlockStart::none(); |
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} |
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2088 |
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$cursor->advanceToNextNonSpaceOrTab(); |
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2088 |
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if ($atxHeading = self::getAtxHeader($cursor)) { |
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return BlockStart::of($atxHeading)->at($cursor); |
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} |
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1956 |
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$setextHeadingLevel = self::getSetextHeadingLevel($cursor); |
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if ($setextHeadingLevel > 0) { |
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$content = $parserState->getParagraphContent(); |
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if ($content !== null) { |
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$cursor->advanceToEnd(); |
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return BlockStart::of(new HeadingParser($setextHeadingLevel, $content)) |
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->at($cursor) |
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->replaceActiveBlockParser(); |
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} |
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} |
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return BlockStart::none(); |
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} |
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2088 |
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private static function getAtxHeader(Cursor $cursor): ?HeadingParser |
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{ |
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2088 |
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$match = RegexHelper::matchFirst('/^#{1,6}(?:[ \t]+|$)/', $cursor->getLine(), $cursor->getNextNonSpacePosition()); |
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2088 |
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if (! $match) { |
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return null; |
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} |
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156 |
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$cursor->advanceToNextNonSpaceOrTab(); |
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$cursor->advanceBy(\strlen($match[0])); |
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$level = \strlen(\trim($match[0])); |
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$str = $cursor->getRemainder(); |
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$str = \preg_replace('/^[ \t]*#+[ \t]*$/', '', $str); |
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\assert(\is_string($str)); |
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$str = \preg_replace('/[ \t]+#+[ \t]*$/', '', $str); |
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\assert(\is_string($str)); |
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return new HeadingParser($level, $str); |
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} |
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1956 |
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private static function getSetextHeadingLevel(Cursor $cursor): int |
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{ |
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$match = RegexHelper::matchFirst('/^(?:=+|-+)[ \t]*$/', $cursor->getLine(), $cursor->getNextNonSpacePosition()); |
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if ($match === null) { |
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return 0; |
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} |
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return $match[0][0] === '=' ? 1 : 2; |
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} |
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} |
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This check looks for function or method calls that always return null and whose return value is used.
The method
getObject()
can return nothing but null, so it makes no sense to use the return value.The reason is most likely that a function or method is imcomplete or has been reduced for debug purposes.