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Edit File : Terminal.php \| Size : 4.88 KB
<?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 $width; private static $height; private static $stty; /* * Gets the terminal width. * * @return int / public function getWidth() { $width = getenv('COLUMNS'); if (false !== $width) { return (int) trim($width); } if (null === self::$width) { self::initDimensions(); } return self::$width ?: 80; } /* * Gets the terminal height. * * @return int / public function getHeight() { $height = getenv('LINES'); if (false !== $height) { return (int) trim($height); } if (null === self::$height) { self::initDimensions(); } return self::$height ?: 50; } /* * @internal * * @return bool / public static function hasSttyAvailable() { 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; } } Back

Edit File : Terminal.php | Size : 4.88 KB

<?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 $width;
    private static $height;
    private static $stty;

/**
     * Gets the terminal width.
     *
     * @return int
     */
    public function getWidth()
    {
        $width = getenv('COLUMNS');
        if (false !== $width) {
            return (int) trim($width);
        }

if (null === self::$width) {
            self::initDimensions();
        }

return self::$width ?: 80;
    }

/**
     * Gets the terminal height.
     *
     * @return int
     */
    public function getHeight()
    {
        $height = getenv('LINES');
        if (false !== $height) {
            return (int) trim($height);
        }

if (null === self::$height) {
            self::initDimensions();
        }

return self::$height ?: 50;
    }

/**
     * @internal
     *
     * @return bool
     */
    public static function hasSttyAvailable()
    {
        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;
    }
}

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