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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\Extension\CommonMark\Node\Block\FencedCode; |
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use League\CommonMark\Parser\Block\AbstractBlockContinueParser; |
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use League\CommonMark\Parser\Block\BlockContinue; |
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use League\CommonMark\Parser\Block\BlockContinueParserInterface; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Util\ArrayCollection; |
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use League\CommonMark\Util\RegexHelper; |
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final class FencedCodeParser extends AbstractBlockContinueParser |
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{ |
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/** @psalm-readonly */ |
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private FencedCode $block; |
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/** @var ArrayCollection<string> */ |
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private ArrayCollection $strings; |
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public function __construct(int $fenceLength, string $fenceChar, int $fenceOffset) |
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{ |
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$this->block = new FencedCode($fenceLength, $fenceChar, $fenceOffset); |
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$this->strings = new ArrayCollection(); |
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} |
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public function getBlock(): FencedCode |
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{ |
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return $this->block; |
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} |
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public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue |
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{ |
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// Check for closing code fence |
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if (! $cursor->isIndented() && $cursor->getNextNonSpaceCharacter() === $this->block->getChar()) { |
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$match = RegexHelper::matchFirst('/^(?:`{3,}|~{3,})(?= *$)/', $cursor->getLine(), $cursor->getNextNonSpacePosition()); |
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if ($match !== null && \strlen($match[0]) >= $this->block->getLength()) { |
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// closing fence - we're at end of line, so we can finalize now |
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return BlockContinue::finished(); |
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} |
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} |
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// Skip optional spaces of fence offset |
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// Optimization: don't attempt to match if we're at a non-space position |
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if ($cursor->getNextNonSpacePosition() > $cursor->getPosition()) { |
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$cursor->match('/^ {0,' . $this->block->getOffset() . '}/'); |
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} |
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return BlockContinue::at($cursor); |
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} |
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public function addLine(string $line): void |
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{ |
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$this->strings[] = $line; |
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} |
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public function closeBlock(): void |
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{ |
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// first line becomes info string |
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$firstLine = $this->strings->first(); |
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if ($firstLine === false) { |
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$firstLine = ''; |
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} |
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$this->block->setInfo(RegexHelper::unescape(\trim($firstLine))); |
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if ($this->strings->count() === 1) { |
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$this->block->setLiteral(''); |
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} else { |
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$this->block->setLiteral(\implode("\n", $this->strings->slice(1)) . "\n"); |
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} |
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} |
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} |
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thephpleague /
commonmark
