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<?php |
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declare(strict_types=1); |
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/* |
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* This is part of the league/commonmark package. |
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* |
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* (c) Martin Hasoň <[email protected]> |
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* (c) Webuni s.r.o. <[email protected]> |
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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\Table; |
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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\Block\ParagraphParser; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Parser\MarkdownParserStateInterface; |
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final class TableStartParser implements BlockStartParserInterface |
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{ |
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111 |
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public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart |
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{ |
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111 |
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$paragraph = $parserState->getParagraphContent(); |
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111 |
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if ($paragraph === null || \strpos($paragraph, '|') === false) { |
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return BlockStart::none(); |
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} |
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81 |
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$columns = self::parseSeparator($cursor); |
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if (\count($columns) === 0) { |
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return BlockStart::none(); |
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} |
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81 |
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$lines = \explode("\n", $paragraph); |
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$lastLine = \array_pop($lines); |
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$headerCells = TableParser::split($lastLine); |
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if (\count($headerCells) > \count($columns)) { |
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return BlockStart::none(); |
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} |
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$cursor->advanceToEnd(); |
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$parsers = []; |
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if (\count($lines) > 0) { |
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$p = new ParagraphParser(); |
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$p->addLine(\implode("\n", $lines)); |
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$parsers[] = $p; |
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} |
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$parsers[] = new TableParser($columns, $headerCells); |
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return BlockStart::of(...$parsers) |
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->at($cursor) |
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->replaceActiveBlockParser(); |
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} |
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/** |
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* @return array<int, string|null> |
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* |
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* @psalm-return list<string|null> |
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*/ |
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private static function parseSeparator(Cursor $cursor): array |
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{ |
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$columns = []; |
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$pipes = 0; |
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$valid = false; |
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while (! $cursor->isAtEnd()) { |
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switch ($c = $cursor->getCharacter()) { |
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case '|': |
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$cursor->advanceBy(1); |
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$pipes++; |
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if ($pipes > 1) { |
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// More than one adjacent pipe not allowed |
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return []; |
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} |
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// Need at least one pipe, even for a one-column table |
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$valid = true; |
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break; |
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case '-': |
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case ':': |
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if ($pipes === 0 && \count($columns) > 0) { |
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// Need a pipe after the first column (first column doesn't need to start with one) |
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return []; |
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} |
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$left = false; |
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$right = false; |
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if ($c === ':') { |
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$left = true; |
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$cursor->advanceBy(1); |
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} |
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if ($cursor->match('/^-+/') === null) { |
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// Need at least one dash |
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return []; |
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} |
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if ($cursor->getCharacter() === ':') { |
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$right = true; |
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$cursor->advanceBy(1); |
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} |
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$columns[] = self::getAlignment($left, $right); |
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// Next, need another pipe |
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$pipes = 0; |
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break; |
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case ' ': |
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3 |
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case "\t": |
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// White space is allowed between pipes and columns |
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$cursor->advanceToNextNonSpaceOrTab(); |
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break; |
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default: |
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// Any other character is invalid |
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return []; |
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} |
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} |
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if (! $valid) { |
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return []; |
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} |
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return $columns; |
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} |
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/** |
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* @psalm-pure |
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*/ |
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private static function getAlignment(bool $left, bool $right): ?string |
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{ |
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if ($left && $right) { |
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return TableCell::ALIGN_CENTER; |
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} |
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if ($left) { |
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return TableCell::ALIGN_LEFT; |
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} |
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if ($right) { |
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return TableCell::ALIGN_RIGHT; |
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} |
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return null; |
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} |
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} |
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thephpleague /
commonmark
