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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 webuni/commonmark-table-extension 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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* |
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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 Webuni\CommonMark\TableExtension; |
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use League\CommonMark\Block\Element\Paragraph; |
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use League\CommonMark\Block\Parser\AbstractBlockParser; |
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use League\CommonMark\ContextInterface; |
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use League\CommonMark\Cursor; |
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use League\CommonMark\Util\RegexHelper; |
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class TableParser extends AbstractBlockParser |
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{ |
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const REGEXP_DEFINITION = '/(?: *(:?) *-+ *(:?) *)+(?=\||$)/'; |
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const REGEXP_CELLS = '/(?:`[^`]*`|\\\\\||\\\\|[^|`\\\\]+)+(?=\||$)/'; |
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const REGEXP_CAPTION = '/^\[(.+?)\](?:\[(.+)\])?\s*$/'; |
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public function parse(ContextInterface $context, Cursor $cursor): bool |
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{ |
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$container = $context->getContainer(); |
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if (!$container instanceof Paragraph) { |
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return false; |
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} |
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$lines = $container->getStrings(); |
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if (count($lines) < 1) { |
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return false; |
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} |
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$expressionOffset = $cursor->getNextNonSpacePosition(); |
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$match = RegexHelper::matchAll(self::REGEXP_DEFINITION, $cursor->getLine(), $expressionOffset); |
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if (null === $match) { |
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return false; |
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} |
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$columns = $this->parseColumns($match); |
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$head = $this->parseRow(trim((string) array_pop($lines)), $columns, TableCell::TYPE_HEAD); |
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if (null === $head) { |
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return false; |
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} |
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$table = new Table(function (Cursor $cursor, Table $table) use ($columns): bool { |
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$row = $this->parseRow($cursor->getLine(), $columns); |
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if (null === $row) { |
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if (null !== $table->getCaption()) { |
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return false; |
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} |
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if (null !== ($caption = $this->parseCaption($cursor->getLine()))) { |
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$table->setCaption($caption); |
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return true; |
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} |
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return false; |
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} |
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$table->getBody()->appendChild($row); |
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return true; |
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}); |
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$table->getHead()->appendChild($head); |
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if (count($lines) >= 1) { |
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$paragraph = new Paragraph(); |
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foreach ($lines as $line) { |
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$paragraph->addLine($line); |
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} |
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$context->replaceContainerBlock($paragraph); |
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$context->addBlock($table); |
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} else { |
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$context->replaceContainerBlock($table); |
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} |
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return true; |
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} |
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private function parseColumns(array $match): array |
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{ |
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$columns = []; |
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foreach ((array) $match[0] as $i => $column) { |
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if (isset($match[1][$i]) && $match[1][$i] && isset($match[2][$i]) && $match[2][$i]) { |
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$columns[] = TableCell::ALIGN_CENTER; |
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} elseif (isset($match[1][$i]) && $match[1][$i]) { |
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$columns[] = TableCell::ALIGN_LEFT; |
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} elseif (isset($match[2][$i]) && $match[2][$i]) { |
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$columns[] = TableCell::ALIGN_RIGHT; |
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} else { |
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$columns[] = ''; |
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} |
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} |
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return $columns; |
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} |
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private function parseRow(string $line, array $columns, string $type = TableCell::TYPE_BODY): ?TableRow |
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{ |
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$cells = RegexHelper::matchAll(self::REGEXP_CELLS, $line); |
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if (null === $cells || $line === $cells[0]) { |
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return null; |
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} |
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$i = 0; |
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$row = new TableRow(); |
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foreach ((array) $cells[0] as $i => $cell) { |
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if (!isset($columns[$i])) { |
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return $row; |
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} |
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$row->appendChild(new TableCell(trim($cell), $type, isset($columns[$i]) ? $columns[$i] : null)); |
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} |
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for ($j = count($columns) - 1; $j > $i; --$j) { |
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$row->appendChild(new TableCell('', $type, null)); |
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} |
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return $row; |
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} |
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private function parseCaption(string $line): ?TableCaption |
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{ |
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$caption = RegexHelper::matchAll(self::REGEXP_CAPTION, $line); |
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if (null === $caption) { |
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return null; |
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} |
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return new TableCaption($caption[1], $caption[2]); |
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} |
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} |
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webuni /
commonmark-table-extension
