Viewing file:  ListBlockParser.php (2.88 KB) -rw-rw-rw-
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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\CommonMark\Parser\Block;
use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
use League\CommonMark\Node\Block\AbstractBlock;
use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
use League\CommonMark\Parser\Block\BlockContinue;
use League\CommonMark\Parser\Block\BlockContinueParserInterface;
use League\CommonMark\Parser\Cursor;
final class ListBlockParser extends AbstractBlockContinueParser
{
/** @psalm-readonly */
private ListBlock $block;
public function __construct(ListData $listData)
{
$this->block = new ListBlock($listData);
}
public function getBlock(): ListBlock
{
return $this->block;
}
public function isContainer(): bool
{
return true;
}
public function canContain(AbstractBlock $childBlock): bool
{
return $childBlock instanceof ListItem;
}
public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
{
// List blocks themselves don't have any markers, only list items. So try to stay in the list.
// If there is a block start other than list item, canContain makes sure that this list is closed.
return BlockContinue::at($cursor);
}
public function closeBlock(): void
{
$item = $this->block->firstChild();
while ($item instanceof AbstractBlock) {
// check for non-final list item ending with blank line:
if ($item->next() !== null && self::endsWithBlankLine($item)) {
$this->block->setTight(false);
break;
}
// recurse into children of list item, to see if there are spaces between any of them
$subitem = $item->firstChild();
while ($subitem instanceof AbstractBlock) {
if ($subitem->next() && self::endsWithBlankLine($subitem)) {
$this->block->setTight(false);
break 2;
}
$subitem = $subitem->next();
}
$item = $item->next();
}
$lastChild = $this->block->lastChild();
if ($lastChild instanceof AbstractBlock) {
$this->block->setEndLine($lastChild->getEndLine());
}
}
private static function endsWithBlankLine(AbstractBlock $block): bool
{
$next = $block->next();
return $next instanceof AbstractBlock && $block->getEndLine() !== $next->getStartLine() - 1;
}
}
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