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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\Formatter; /** * @author Jean-François Simon <contact@jfsimon.fr> */ class OutputFormatterStyleStack { /** * @var OutputFormatterStyleInterface[] */ private $styles; /** * @var OutputFormatterStyleInterface */ private $emptyStyle; /** * Constructor. * * @param OutputFormatterStyleInterface|null $emptyStyle */ public function __construct(OutputFormatterStyleInterface $emptyStyle = null) { $this->emptyStyle = $emptyStyle ?: new OutputFormatterStyle(); $this->reset(); } /** * Resets stack (ie. empty internal arrays). */ public function reset() { $this->styles = array(); } /** * Pushes a style in the stack. * * @param OutputFormatterStyleInterface $style */ public function push(OutputFormatterStyleInterface $style) { $this->styles[] = $style; } /** * Pops a style from the stack. * * @param OutputFormatterStyleInterface|null $style * * @return OutputFormatterStyleInterface * * @throws \InvalidArgumentException When style tags incorrectly nested */ public function pop(OutputFormatterStyleInterface $style = null) { if (empty($this->styles)) { return $this->emptyStyle; } if (null === $style) { return array_pop($this->styles); } foreach (array_reverse($this->styles, true) as $index => $stackedStyle) { if ($style->apply('') === $stackedStyle->apply('')) { $this->styles = array_slice($this->styles, 0, $index); return $stackedStyle; } } throw new \InvalidArgumentException('Incorrectly nested style tag found.'); } /** * Computes current style with stacks top codes. * * @return OutputFormatterStyle */ public function getCurrent() { if (empty($this->styles)) { return $this->emptyStyle; } return $this->styles[count($this->styles)-1]; } /** * @param OutputFormatterStyleInterface $emptyStyle * * @return OutputFormatterStyleStack */ public function setEmptyStyle(OutputFormatterStyleInterface $emptyStyle) { $this->emptyStyle = $emptyStyle; return $this; } /** * @return OutputFormatterStyleInterface */ public function getEmptyStyle() { return $this->emptyStyle; } }