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Filename : OutputFormatterStyle.php
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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;

use Symfony\Component\Console\Exception\InvalidArgumentException;

/**
 * Formatter style class for defining styles.
 *
 * @author Konstantin Kudryashov <ever.zet@gmail.com>
 */
class OutputFormatterStyle implements OutputFormatterStyleInterface
{
    private static $availableForegroundColors = array(
        'black' => array('set' => 30, 'unset' => 39),
        'red' => array('set' => 31, 'unset' => 39),
        'green' => array('set' => 32, 'unset' => 39),
        'yellow' => array('set' => 33, 'unset' => 39),
        'blue' => array('set' => 34, 'unset' => 39),
        'magenta' => array('set' => 35, 'unset' => 39),
        'cyan' => array('set' => 36, 'unset' => 39),
        'white' => array('set' => 37, 'unset' => 39),
        'default' => array('set' => 39, 'unset' => 39),
    );
    private static $availableBackgroundColors = array(
        'black' => array('set' => 40, 'unset' => 49),
        'red' => array('set' => 41, 'unset' => 49),
        'green' => array('set' => 42, 'unset' => 49),
        'yellow' => array('set' => 43, 'unset' => 49),
        'blue' => array('set' => 44, 'unset' => 49),
        'magenta' => array('set' => 45, 'unset' => 49),
        'cyan' => array('set' => 46, 'unset' => 49),
        'white' => array('set' => 47, 'unset' => 49),
        'default' => array('set' => 49, 'unset' => 49),
    );
    private static $availableOptions = array(
        'bold' => array('set' => 1, 'unset' => 22),
        'underscore' => array('set' => 4, 'unset' => 24),
        'blink' => array('set' => 5, 'unset' => 25),
        'reverse' => array('set' => 7, 'unset' => 27),
        'conceal' => array('set' => 8, 'unset' => 28),
    );

    private $foreground;
    private $background;
    private $options = array();

    /**
     * Initializes output formatter style.
     *
     * @param string|null $foreground The style foreground color name
     * @param string|null $background The style background color name
     * @param array       $options    The style options
     */
    public function __construct($foreground = null, $background = null, array $options = array())
    {
        if (null !== $foreground) {
            $this->setForeground($foreground);
        }
        if (null !== $background) {
            $this->setBackground($background);
        }
        if (count($options)) {
            $this->setOptions($options);
        }
    }

    /**
     * Sets style foreground color.
     *
     * @param string|null $color The color name
     *
     * @throws InvalidArgumentException When the color name isn't defined
     */
    public function setForeground($color = null)
    {
        if (null === $color) {
            $this->foreground = null;

            return;
        }

        if (!isset(static::$availableForegroundColors[$color])) {
            throw new InvalidArgumentException(sprintf(
                'Invalid foreground color specified: "%s". Expected one of (%s)',
                $color,
                implode(', ', array_keys(static::$availableForegroundColors))
            ));
        }

        $this->foreground = static::$availableForegroundColors[$color];
    }

    /**
     * Sets style background color.
     *
     * @param string|null $color The color name
     *
     * @throws InvalidArgumentException When the color name isn't defined
     */
    public function setBackground($color = null)
    {
        if (null === $color) {
            $this->background = null;

            return;
        }

        if (!isset(static::$availableBackgroundColors[$color])) {
            throw new InvalidArgumentException(sprintf(
                'Invalid background color specified: "%s". Expected one of (%s)',
                $color,
                implode(', ', array_keys(static::$availableBackgroundColors))
            ));
        }

        $this->background = static::$availableBackgroundColors[$color];
    }

    /**
     * Sets some specific style option.
     *
     * @param string $option The option name
     *
     * @throws InvalidArgumentException When the option name isn't defined
     */
    public function setOption($option)
    {
        if (!isset(static::$availableOptions[$option])) {
            throw new InvalidArgumentException(sprintf(
                'Invalid option specified: "%s". Expected one of (%s)',
                $option,
                implode(', ', array_keys(static::$availableOptions))
            ));
        }

        if (!in_array(static::$availableOptions[$option], $this->options)) {
            $this->options[] = static::$availableOptions[$option];
        }
    }

    /**
     * Unsets some specific style option.
     *
     * @param string $option The option name
     *
     * @throws InvalidArgumentException When the option name isn't defined
     */
    public function unsetOption($option)
    {
        if (!isset(static::$availableOptions[$option])) {
            throw new InvalidArgumentException(sprintf(
                'Invalid option specified: "%s". Expected one of (%s)',
                $option,
                implode(', ', array_keys(static::$availableOptions))
            ));
        }

        $pos = array_search(static::$availableOptions[$option], $this->options);
        if (false !== $pos) {
            unset($this->options[$pos]);
        }
    }

    /**
     * Sets multiple style options at once.
     *
     * @param array $options
     */
    public function setOptions(array $options)
    {
        $this->options = array();

        foreach ($options as $option) {
            $this->setOption($option);
        }
    }

    /**
     * Applies the style to a given text.
     *
     * @param string $text The text to style
     *
     * @return string
     */
    public function apply($text)
    {
        $setCodes = array();
        $unsetCodes = array();

        if (null !== $this->foreground) {
            $setCodes[] = $this->foreground['set'];
            $unsetCodes[] = $this->foreground['unset'];
        }
        if (null !== $this->background) {
            $setCodes[] = $this->background['set'];
            $unsetCodes[] = $this->background['unset'];
        }
        if (count($this->options)) {
            foreach ($this->options as $option) {
                $setCodes[] = $option['set'];
                $unsetCodes[] = $option['unset'];
            }
        }

        if (0 === count($setCodes)) {
            return $text;
        }

        return sprintf("\033[%sm%s\033[%sm", implode(';', $setCodes), $text, implode(';', $unsetCodes));
    }
}