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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;
use Symfony\Component\Console\Exception\InvalidArgumentException;
/**
* @author Fabien Potencier <fabien@symfony.com>
*/
final class Color
{
private const COLORS = [
'black' => 0,
'red' => 1,
'green' => 2,
'yellow' => 3,
'blue' => 4,
'magenta' => 5,
'cyan' => 6,
'white' => 7,
'default' => 9,
];
private const BRIGHT_COLORS = [
'gray' => 0,
'bright-red' => 1,
'bright-green' => 2,
'bright-yellow' => 3,
'bright-blue' => 4,
'bright-magenta' => 5,
'bright-cyan' => 6,
'bright-white' => 7,
];
private const AVAILABLE_OPTIONS = [
'bold' => ['set' => 1, 'unset' => 22],
'underscore' => ['set' => 4, 'unset' => 24],
'blink' => ['set' => 5, 'unset' => 25],
'reverse' => ['set' => 7, 'unset' => 27],
'conceal' => ['set' => 8, 'unset' => 28],
];
private $foreground;
private $background;
private $options = [];
public function __construct(string $foreground = '', string $background = '', array $options = [])
{
$this->foreground = $this->parseColor($foreground);
$this->background = $this->parseColor($background, true);
foreach ($options as $option) {
if (!isset(self::AVAILABLE_OPTIONS[$option])) {
throw new InvalidArgumentException(sprintf('Invalid option specified: "%s". Expected one of (%s).', $option, implode(', ', array_keys(self::AVAILABLE_OPTIONS))));
}
$this->options[$option] = self::AVAILABLE_OPTIONS[$option];
}
}
public function apply(string $text): string
{
return $this->set().$text.$this->unset();
}
public function set(): string
{
$setCodes = [];
if ('' !== $this->foreground) {
$setCodes[] = $this->foreground;
}
if ('' !== $this->background) {
$setCodes[] = $this->background;
}
foreach ($this->options as $option) {
$setCodes[] = $option['set'];
}
if (0 === \count($setCodes)) {
return '';
}
return sprintf("\033[%sm", implode(';', $setCodes));
}
public function unset(): string
{
$unsetCodes = [];
if ('' !== $this->foreground) {
$unsetCodes[] = 39;
}
if ('' !== $this->background) {
$unsetCodes[] = 49;
}
foreach ($this->options as $option) {
$unsetCodes[] = $option['unset'];
}
if (0 === \count($unsetCodes)) {
return '';
}
return sprintf("\033[%sm", implode(';', $unsetCodes));
}
private function parseColor(string $color, bool $background = false): string
{
if ('' === $color) {
return '';
}
if ('#' === $color[0]) {
$color = substr($color, 1);
if (3 === \strlen($color)) {
$color = $color[0].$color[0].$color[1].$color[1].$color[2].$color[2];
}
if (6 !== \strlen($color)) {
throw new InvalidArgumentException(sprintf('Invalid "%s" color.', $color));
}
return ($background ? '4' : '3').$this->convertHexColorToAnsi(hexdec($color));
}
if (isset(self::COLORS[$color])) {
return ($background ? '4' : '3').self::COLORS[$color];
}
if (isset(self::BRIGHT_COLORS[$color])) {
return ($background ? '10' : '9').self::BRIGHT_COLORS[$color];
}
throw new InvalidArgumentException(sprintf('Invalid "%s" color; expected one of (%s).', $color, implode(', ', array_merge(array_keys(self::COLORS), array_keys(self::BRIGHT_COLORS)))));
}
private function convertHexColorToAnsi(int $color): string
{
$r = ($color >> 16) & 255;
$g = ($color >> 8) & 255;
$b = $color & 255;
// see https://github.com/termstandard/colors/ for more information about true color support
if ('truecolor' !== getenv('COLORTERM')) {
return (string) $this->degradeHexColorToAnsi($r, $g, $b);
}
return sprintf('8;2;%d;%d;%d', $r, $g, $b);
}
private function degradeHexColorToAnsi(int $r, int $g, int $b): int
{
if (0 === round($this->getSaturation($r, $g, $b) / 50)) {
return 0;
}
return (round($b / 255) << 2) | (round($g / 255) << 1) | round($r / 255);
}
private function getSaturation(int $r, int $g, int $b): int
{
$r = $r / 255;
$g = $g / 255;
$b = $b / 255;
$v = max($r, $g, $b);
if (0 === $diff = $v - min($r, $g, $b)) {
return 0;
}
return (int) $diff * 100 / $v;
}
}
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