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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\Output\AnsiColorMode; class Terminal { public const DEFAULT_COLOR_MODE = AnsiColorMode::Ansi4; private static ?AnsiColorMode $colorMode = null; private static ?int $width = null; private static ?int $height = null; private static ?bool $stty = null; /** * About Ansi color types: https://en.wikipedia.org/wiki/ANSI_escape_code#Colors * For more information about true color support with terminals https://github.com/termstandard/colors/. */ public static function getColorMode(): AnsiColorMode { // Use Cache from previous run (or user forced mode) if (null !== self::$colorMode) { return self::$colorMode; } // Try with $COLORTERM first if (\is_string($colorterm = getenv('COLORTERM'))) { $colorterm = strtolower($colorterm); if (str_contains($colorterm, 'truecolor')) { self::setColorMode(AnsiColorMode::Ansi24); return self::$colorMode; } if (str_contains($colorterm, '256color')) { self::setColorMode(AnsiColorMode::Ansi8); return self::$colorMode; } } // Try with $TERM if (\is_string($term = getenv('TERM'))) { $term = strtolower($term); if (str_contains($term, 'truecolor')) { self::setColorMode(AnsiColorMode::Ansi24); return self::$colorMode; } if (str_contains($term, '256color')) { self::setColorMode(AnsiColorMode::Ansi8); return self::$colorMode; } } self::setColorMode(self::DEFAULT_COLOR_MODE); return self::$colorMode; } /** * Force a terminal color mode rendering. */ public static function setColorMode(?AnsiColorMode $colorMode): void { self::$colorMode = $colorMode; } /** * Gets the terminal width. */ public function getWidth(): int { $width = getenv('COLUMNS'); if (false !== $width) { return (int) trim($width); } if (null === self::$width) { self::initDimensions(); } return self::$width ?: 80; } /** * Gets the terminal height. */ public function getHeight(): int { $height = getenv('LINES'); if (false !== $height) { return (int) trim($height); } if (null === self::$height) { self::initDimensions(); } return self::$height ?: 50; } /** * @internal */ public static function hasSttyAvailable(): bool { if (null !== self::$stty) { return self::$stty; } // skip check if shell_exec function is disabled if (!\function_exists('shell_exec')) { return false; } return self::$stty = (bool) shell_exec('stty 2> '.('\\' === \DIRECTORY_SEPARATOR ? 'NUL' : '/dev/null')); } private static function initDimensions(): void { if ('\\' === \DIRECTORY_SEPARATOR) { $ansicon = getenv('ANSICON'); if (false !== $ansicon && preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim($ansicon), $matches)) { // extract [w, H] from "wxh (WxH)" // or [w, h] from "wxh" self::$width = (int) $matches[1]; self::$height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2]; } elseif (!self::hasVt100Support() && self::hasSttyAvailable()) { // only use stty on Windows if the terminal does not support vt100 (e.g. Windows 7 + git-bash) // testing for stty in a Windows 10 vt100-enabled console will implicitly disable vt100 support on STDOUT self::initDimensionsUsingStty(); } elseif (null !== $dimensions = self::getConsoleMode()) { // extract [w, h] from "wxh" self::$width = (int) $dimensions[0]; self::$height = (int) $dimensions[1]; } } else { self::initDimensionsUsingStty(); } } /** * Returns whether STDOUT has vt100 support (some Windows 10+ configurations). */ private static function hasVt100Support(): bool { return \function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout', 'w')); } /** * Initializes dimensions using the output of an stty columns line. */ private static function initDimensionsUsingStty(): void { if ($sttyString = self::getSttyColumns()) { if (preg_match('/rows.(\d+);.columns.(\d+);/is', $sttyString, $matches)) { // extract [w, h] from "rows h; columns w;" self::$width = (int) $matches[2]; self::$height = (int) $matches[1]; } elseif (preg_match('/;.(\d+).rows;.(\d+).columns/is', $sttyString, $matches)) { // extract [w, h] from "; h rows; w columns" self::$width = (int) $matches[2]; self::$height = (int) $matches[1]; } } } /** * Runs and parses mode CON if it's available, suppressing any error output. * * @return int[]|null An array composed of the width and the height or null if it could not be parsed */ private static function getConsoleMode(): ?array { $info = self::readFromProcess('mode CON'); if (null === $info || !preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) { return null; } return [(int) $matches[2], (int) $matches[1]]; } /** * Runs and parses stty -a if it's available, suppressing any error output. */ private static function getSttyColumns(): ?string { return self::readFromProcess(['stty', '-a']); } private static function readFromProcess(string|array $command): ?string { if (!\function_exists('proc_open')) { return null; } $descriptorspec = [ 1 => ['pipe', 'w'], 2 => ['pipe', 'w'], ]; $cp = \function_exists('sapi_windows_cp_set') ? sapi_windows_cp_get() : 0; $process = proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => true]); if (!\is_resource($process)) { return null; } $info = stream_get_contents($pipes[1]); fclose($pipes[1]); fclose($pipes[2]); proc_close($process); if ($cp) { sapi_windows_cp_set($cp); } return $info; } }
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