<?php
declare(strict_types=1);
/*
* This is part of the league/commonmark package.
*
* (c) Martin HasoĊ <martin.hason@gmail.com>
* (c) Webuni s.r.o. <info@webuni.cz>
* (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\Table;
use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
use League\CommonMark\Parser\Block\BlockContinue;
use League\CommonMark\Parser\Block\BlockContinueParserInterface;
use League\CommonMark\Parser\Block\BlockContinueParserWithInlinesInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\InlineParserEngineInterface;
use League\CommonMark\Util\ArrayCollection;
final class TableParser extends AbstractBlockContinueParser implements BlockContinueParserWithInlinesInterface
{
/**
* @internal
*/
public const DEFAULT_MAX_AUTOCOMPLETED_CELLS = 10_000;
/** @psalm-readonly */
private Table $block;
/**
* @var ArrayCollection<string>
*
* @psalm-readonly-allow-private-mutation
*/
private ArrayCollection $bodyLines;
/**
* @var array<int, string|null>
* @psalm-var array<int, TableCell::ALIGN_*|null>
* @phpstan-var array<int, TableCell::ALIGN_*|null>
*
* @psalm-readonly
*/
private array $columns;
/**
* @var array<int, string>
*
* @psalm-readonly-allow-private-mutation
*/
private array $headerCells;
/** @psalm-readonly-allow-private-mutation */
private bool $nextIsSeparatorLine = true;
private int $remainingAutocompletedCells;
/**
* @param array<int, string|null> $columns
* @param array<int, string> $headerCells
*
* @psalm-param array<int, TableCell::ALIGN_*|null> $columns
*
* @phpstan-param array<int, TableCell::ALIGN_*|null> $columns
*/
public function __construct(array $columns, array $headerCells, int $remainingAutocompletedCells = self::DEFAULT_MAX_AUTOCOMPLETED_CELLS)
{
$this->block = new Table();
$this->bodyLines = new ArrayCollection();
$this->columns = $columns;
$this->headerCells = $headerCells;
$this->remainingAutocompletedCells = $remainingAutocompletedCells;
}
public function canHaveLazyContinuationLines(): bool
{
return true;
}
public function getBlock(): Table
{
return $this->block;
}
public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
{
if (\strpos($cursor->getLine(), '|') === false) {
return BlockContinue::none();
}
return BlockContinue::at($cursor);
}
public function addLine(string $line): void
{
if ($this->nextIsSeparatorLine) {
$this->nextIsSeparatorLine = false;
} else {
$this->bodyLines[] = $line;
}
}
public function parseInlines(InlineParserEngineInterface $inlineParser): void
{
$headerColumns = \count($this->headerCells);
$head = new TableSection(TableSection::TYPE_HEAD);
$this->block->appendChild($head);
$headerRow = new TableRow();
$head->appendChild($headerRow);
for ($i = 0; $i < $headerColumns; $i++) {
$cell = $this->headerCells[$i];
$tableCell = $this->parseCell($cell, $i, $inlineParser);
$tableCell->setType(TableCell::TYPE_HEADER);
$headerRow->appendChild($tableCell);
}
$body = null;
foreach ($this->bodyLines as $rowLine) {
$cells = self::split($rowLine);
$row = new TableRow();
// Body can not have more columns than head
for ($i = 0; $i < $headerColumns; $i++) {
// It can have less columns though, in which case we'll autocomplete the empty ones (up to some limit)
if (! isset($cells[$i]) && $this->remainingAutocompletedCells-- <= 0) {
// Too many cells were auto-completed, so we'll just stop here
return;
}
$cell = $cells[$i] ?? '';
$tableCell = $this->parseCell($cell, $i, $inlineParser);
$row->appendChild($tableCell);
}
if ($body === null) {
// It's valid to have a table without body. In that case, don't add an empty TableBody node.
$body = new TableSection();
$this->block->appendChild($body);
}
$body->appendChild($row);
}
}
private function parseCell(string $cell, int $column, InlineParserEngineInterface $inlineParser): TableCell
{
$tableCell = new TableCell(TableCell::TYPE_DATA, $this->columns[$column] ?? null);
if ($cell !== '') {
$inlineParser->parse(\trim($cell), $tableCell);
}
return $tableCell;
}
/**
* @internal
*
* @return array<int, string>
*/
public static function split(string $line): array
{
$cursor = new Cursor(\trim($line));
if ($cursor->getCurrentCharacter() === '|') {
$cursor->advanceBy(1);
}
$cells = [];
$sb = '';
while (! $cursor->isAtEnd()) {
switch ($c = $cursor->getCurrentCharacter()) {
case '\\':
if ($cursor->peek() === '|') {
// Pipe is special for table parsing. An escaped pipe doesn't result in a new cell, but is
// passed down to inline parsing as an unescaped pipe. Note that that applies even for the `\|`
// in an input like `\\|` - in other words, table parsing doesn't support escaping backslashes.
$sb .= '|';
$cursor->advanceBy(1);
} else {
// Preserve backslash before other characters or at end of line.
$sb .= '\\';
}
break;
case '|':
$cells[] = $sb;
$sb = '';
break;
default:
$sb .= $c;
}
$cursor->advanceBy(1);
}
if ($sb !== '') {
$cells[] = $sb;
}
return $cells;
}
}
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