Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Console\Formatter;
Chris@0: 
Chris@0: use Symfony\Component\Console\Exception\InvalidArgumentException;
Chris@0: 
Chris@0: /**
Chris@0:  * @author Jean-François Simon <contact@jfsimon.fr>
Chris@0:  */
Chris@0: class OutputFormatterStyleStack
Chris@0: {
Chris@0:     /**
Chris@0:      * @var OutputFormatterStyleInterface[]
Chris@0:      */
Chris@0:     private $styles;
Chris@0: 
Chris@0:     private $emptyStyle;
Chris@0: 
Chris@0:     public function __construct(OutputFormatterStyleInterface $emptyStyle = null)
Chris@0:     {
Chris@0:         $this->emptyStyle = $emptyStyle ?: new OutputFormatterStyle();
Chris@0:         $this->reset();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Resets stack (ie. empty internal arrays).
Chris@0:      */
Chris@0:     public function reset()
Chris@0:     {
Chris@17:         $this->styles = [];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Pushes a style in the stack.
Chris@0:      */
Chris@0:     public function push(OutputFormatterStyleInterface $style)
Chris@0:     {
Chris@0:         $this->styles[] = $style;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Pops a style from the stack.
Chris@0:      *
Chris@0:      * @return OutputFormatterStyleInterface
Chris@0:      *
Chris@0:      * @throws InvalidArgumentException When style tags incorrectly nested
Chris@0:      */
Chris@0:     public function pop(OutputFormatterStyleInterface $style = null)
Chris@0:     {
Chris@0:         if (empty($this->styles)) {
Chris@0:             return $this->emptyStyle;
Chris@0:         }
Chris@0: 
Chris@0:         if (null === $style) {
Chris@0:             return array_pop($this->styles);
Chris@0:         }
Chris@0: 
Chris@0:         foreach (array_reverse($this->styles, true) as $index => $stackedStyle) {
Chris@0:             if ($style->apply('') === $stackedStyle->apply('')) {
Chris@17:                 $this->styles = \array_slice($this->styles, 0, $index);
Chris@0: 
Chris@0:                 return $stackedStyle;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         throw new InvalidArgumentException('Incorrectly nested style tag found.');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Computes current style with stacks top codes.
Chris@0:      *
Chris@0:      * @return OutputFormatterStyle
Chris@0:      */
Chris@0:     public function getCurrent()
Chris@0:     {
Chris@0:         if (empty($this->styles)) {
Chris@0:             return $this->emptyStyle;
Chris@0:         }
Chris@0: 
Chris@17:         return $this->styles[\count($this->styles) - 1];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return $this
Chris@0:      */
Chris@0:     public function setEmptyStyle(OutputFormatterStyleInterface $emptyStyle)
Chris@0:     {
Chris@0:         $this->emptyStyle = $emptyStyle;
Chris@0: 
Chris@0:         return $this;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return OutputFormatterStyleInterface
Chris@0:      */
Chris@0:     public function getEmptyStyle()
Chris@0:     {
Chris@0:         return $this->emptyStyle;
Chris@0:     }
Chris@0: }