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<?php
declare(strict_types=1);
namespace NunoMaduro\Collision;
use NunoMaduro\Collision\Exceptions\InvalidStyleException;
use NunoMaduro\Collision\Exceptions\ShouldNotHappen;
/**
* @internal
*/
final class ConsoleColor
{
const FOREGROUND = 38;
const BACKGROUND = 48;
const COLOR256_REGEXP = '~^(bg_)?color_(\d{1,3})$~';
const RESET_STYLE = 0;
/** @var bool */
private $isSupported;
/** @var bool */
private $forceStyle = false;
/** @var array */
private const STYLES = [
'none' => null,
'bold' => '1',
'dark' => '2',
'italic' => '3',
'underline' => '4',
'blink' => '5',
'reverse' => '7',
'concealed' => '8',
'default' => '39',
'black' => '30',
'red' => '31',
'green' => '32',
'yellow' => '33',
'blue' => '34',
'magenta' => '35',
'cyan' => '36',
'light_gray' => '37',
'dark_gray' => '90',
'light_red' => '91',
'light_green' => '92',
'light_yellow' => '93',
'light_blue' => '94',
'light_magenta' => '95',
'light_cyan' => '96',
'white' => '97',
'bg_default' => '49',
'bg_black' => '40',
'bg_red' => '41',
'bg_green' => '42',
'bg_yellow' => '43',
'bg_blue' => '44',
'bg_magenta' => '45',
'bg_cyan' => '46',
'bg_light_gray' => '47',
'bg_dark_gray' => '100',
'bg_light_red' => '101',
'bg_light_green' => '102',
'bg_light_yellow' => '103',
'bg_light_blue' => '104',
'bg_light_magenta' => '105',
'bg_light_cyan' => '106',
'bg_white' => '107',
];
/** @var array */
private $themes = [];
public function __construct()
{
$this->isSupported = $this->isSupported();
}
/**
* @param string|array $style
* @param string $text
*
* @return string
*
* @throws InvalidStyleException
* @throws \InvalidArgumentException
*/
public function apply($style, $text)
{
if (!$this->isStyleForced() && !$this->isSupported()) {
return $text;
}
if (is_string($style)) {
$style = [$style];
}
if (!is_array($style)) {
throw new \InvalidArgumentException('Style must be string or array.');
}
$sequences = [];
foreach ($style as $s) {
if (isset($this->themes[$s])) {
$sequences = array_merge($sequences, $this->themeSequence($s));
} elseif ($this->isValidStyle($s)) {
$sequences[] = $this->styleSequence($s);
} else {
throw new ShouldNotHappen();
}
}
$sequences = array_filter($sequences, function ($val) {
return $val !== null;
});
if (empty($sequences)) {
return $text;
}
return $this->escSequence(implode(';', $sequences)) . $text . $this->escSequence(self::RESET_STYLE);
}
/**
* @param bool $forceStyle
*/
public function setForceStyle($forceStyle)
{
$this->forceStyle = $forceStyle;
}
/**
* @return bool
*/
public function isStyleForced()
{
return $this->forceStyle;
}
public function setThemes(array $themes)
{
$this->themes = [];
foreach ($themes as $name => $styles) {
$this->addTheme($name, $styles);
}
}
/**
* @param string $name
* @param array|string $styles
*/
public function addTheme($name, $styles)
{
if (is_string($styles)) {
$styles = [$styles];
}
if (!is_array($styles)) {
throw new \InvalidArgumentException('Style must be string or array.');
}
foreach ($styles as $style) {
if (!$this->isValidStyle($style)) {
throw new InvalidStyleException($style);
}
}
$this->themes[$name] = $styles;
}
/**
* @return array
*/
public function getThemes()
{
return $this->themes;
}
/**
* @param string $name
*
* @return bool
*/
public function hasTheme($name)
{
return isset($this->themes[$name]);
}
/**
* @param string $name
*/
public function removeTheme($name)
{
unset($this->themes[$name]);
}
/**
* @return bool
*/
public function isSupported()
{
if (DIRECTORY_SEPARATOR === '\\') {
return getenv('ANSICON') !== false || getenv('ConEmuANSI') === 'ON';
}
return function_exists('posix_isatty') && @posix_isatty(STDOUT);
}
/**
* @return bool
*/
public function are256ColorsSupported()
{
if (DIRECTORY_SEPARATOR === '\\') {
return function_exists('sapi_windows_vt100_support') && @sapi_windows_vt100_support(STDOUT);
}
return strpos(getenv('TERM'), '256color') !== false;
}
/**
* @return array
*/
public function getPossibleStyles()
{
return array_keys(self::STYLES);
}
/**
* @param string $name
*
* @return string[]
*/
private function themeSequence($name)
{
$sequences = [];
foreach ($this->themes[$name] as $style) {
$sequences[] = $this->styleSequence($style);
}
return $sequences;
}
/**
* @param string $style
*
* @return string
*/
private function styleSequence($style)
{
if (array_key_exists($style, self::STYLES)) {
return self::STYLES[$style];
}
if (!$this->are256ColorsSupported()) {
return null;
}
preg_match(self::COLOR256_REGEXP, $style, $matches);
$type = $matches[1] === 'bg_' ? self::BACKGROUND : self::FOREGROUND;
$value = $matches[2];
return "$type;5;$value";
}
/**
* @param string $style
*
* @return bool
*/
private function isValidStyle($style)
{
return array_key_exists($style, self::STYLES) || preg_match(self::COLOR256_REGEXP, $style);
}
/**
* @param string|int $value
*
* @return string
*/
private function escSequence($value)
{
return "\033[{$value}m";
}
}