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Filename : Terminal.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;

class Terminal
{
    private static ?int $width = null;
    private static ?int $height = null;
    private static ?bool $stty = null;

    /**
     * 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 exec function is disabled
        if (!\function_exists('exec')) {
            return false;
        }

        exec('stty 2>&1', $output, $exitcode);

        return self::$stty = 0 === $exitcode;
    }

    private static function initDimensions()
    {
        if ('\\' === \DIRECTORY_SEPARATOR) {
            if (preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim(getenv('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()
    {
        if ($sttyString = self::getSttyColumns()) {
            if (preg_match('/rows.(\d+);.columns.(\d+);/i', $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/i', $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 | grep columns');
    }

    private static function readFromProcess(string $command): ?string
    {
        if (!\function_exists('proc_open')) {
            return null;
        }

        $descriptorspec = [
            1 => ['pipe', 'w'],
            2 => ['pipe', 'w'],
        ];

        $process = proc_open($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);

        return $info;
    }
}

Name	Size	Last Modified	Owner	Permissions
Attribute	Dir	December 10 2024 5:51:58	kashyapgreen	0755
CI	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Command	Dir	December 10 2024 5:51:58	kashyapgreen	0755
CommandLoader	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Completion	Dir	December 10 2024 5:51:58	kashyapgreen	0755
DependencyInjection	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Descriptor	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Event	Dir	December 10 2024 5:51:58	kashyapgreen	0755
EventListener	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Exception	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Formatter	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Helper	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Input	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Logger	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Output	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Question	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Resources	Dir	December 10 2024 5:51:58	kashyapgreen	0755
SignalRegistry	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Style	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Tester	Dir	December 10 2024 5:51:58	kashyapgreen	0755
Application.php	43.248 KB	December 31 2022 7:06:10	kashyapgreen	0644
CHANGELOG.md	8.618 KB	December 31 2022 7:06:10	kashyapgreen	0644
Color.php	4.996 KB	December 31 2022 7:06:10	kashyapgreen	0644
composer.json	1.628 KB	December 31 2022 7:06:10	kashyapgreen	0644
ConsoleEvents.php	2.123 KB	December 31 2022 7:06:10	kashyapgreen	0644
Cursor.php	4.059 KB	December 31 2022 7:06:10	kashyapgreen	0644
LICENSE	1.04 KB	December 31 2022 7:06:10	kashyapgreen	0644
README.md	1.203 KB	December 31 2022 7:06:10	kashyapgreen	0644
SingleCommandApplication.php	1.752 KB	December 31 2022 7:06:10	kashyapgreen	0644
Terminal.php	4.856 KB	December 31 2022 7:06:10	kashyapgreen	0644

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