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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Console\Output; use Symfony\Component\Console\Exception\InvalidArgumentException; use Symfony\Component\Console\Formatter\OutputFormatterInterface; /** * A BufferedOutput that keeps only the last N chars. * * @author Jérémy Derussé <jeremy@derusse.com> */ class TrimmedBufferOutput extends Output { private int $maxLength; private string $buffer = ''; public function __construct(int $maxLength, ?int $verbosity = self::VERBOSITY_NORMAL, bool $decorated = false, ?OutputFormatterInterface $formatter = null) { if ($maxLength <= 0) { throw new InvalidArgumentException(\sprintf('"%s()" expects a strictly positive maxLength. Got %d.', __METHOD__, $maxLength)); } parent::__construct($verbosity, $decorated, $formatter); $this->maxLength = $maxLength; } /** * Empties buffer and returns its content. */ public function fetch(): string { $content = $this->buffer; $this->buffer = ''; return $content; } protected function doWrite(string $message, bool $newline): void { $this->buffer .= $message; if ($newline) { $this->buffer .= \PHP_EOL; } $this->buffer = substr($this->buffer, -$this->maxLength); } }