Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Console;
Chris@0: 
Chris@0: class Terminal
Chris@0: {
Chris@0:     private static $width;
Chris@0:     private static $height;
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the terminal width.
Chris@0:      *
Chris@0:      * @return int
Chris@0:      */
Chris@0:     public function getWidth()
Chris@0:     {
Chris@0:         $width = getenv('COLUMNS');
Chris@0:         if (false !== $width) {
Chris@0:             return (int) trim($width);
Chris@0:         }
Chris@0: 
Chris@0:         if (null === self::$width) {
Chris@0:             self::initDimensions();
Chris@0:         }
Chris@0: 
Chris@0:         return self::$width ?: 80;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the terminal height.
Chris@0:      *
Chris@0:      * @return int
Chris@0:      */
Chris@0:     public function getHeight()
Chris@0:     {
Chris@0:         $height = getenv('LINES');
Chris@0:         if (false !== $height) {
Chris@0:             return (int) trim($height);
Chris@0:         }
Chris@0: 
Chris@0:         if (null === self::$height) {
Chris@0:             self::initDimensions();
Chris@0:         }
Chris@0: 
Chris@0:         return self::$height ?: 50;
Chris@0:     }
Chris@0: 
Chris@0:     private static function initDimensions()
Chris@0:     {
Chris@17:         if ('\\' === \DIRECTORY_SEPARATOR) {
Chris@0:             if (preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim(getenv('ANSICON')), $matches)) {
Chris@0:                 // extract [w, H] from "wxh (WxH)"
Chris@0:                 // or [w, h] from "wxh"
Chris@0:                 self::$width = (int) $matches[1];
Chris@0:                 self::$height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2];
Chris@0:             } elseif (null !== $dimensions = self::getConsoleMode()) {
Chris@0:                 // extract [w, h] from "wxh"
Chris@0:                 self::$width = (int) $dimensions[0];
Chris@0:                 self::$height = (int) $dimensions[1];
Chris@0:             }
Chris@0:         } elseif ($sttyString = self::getSttyColumns()) {
Chris@0:             if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) {
Chris@0:                 // extract [w, h] from "rows h; columns w;"
Chris@0:                 self::$width = (int) $matches[2];
Chris@0:                 self::$height = (int) $matches[1];
Chris@0:             } elseif (preg_match('/;.(\d+).rows;.(\d+).columns/i', $sttyString, $matches)) {
Chris@0:                 // extract [w, h] from "; h rows; w columns"
Chris@0:                 self::$width = (int) $matches[2];
Chris@0:                 self::$height = (int) $matches[1];
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Runs and parses mode CON if it's available, suppressing any error output.
Chris@0:      *
Chris@0:      * @return int[]|null An array composed of the width and the height or null if it could not be parsed
Chris@0:      */
Chris@0:     private static function getConsoleMode()
Chris@0:     {
Chris@17:         if (!\function_exists('proc_open')) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@17:         $descriptorspec = [
Chris@17:             1 => ['pipe', 'w'],
Chris@17:             2 => ['pipe', 'w'],
Chris@17:         ];
Chris@17:         $process = proc_open('mode CON', $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
Chris@17:         if (\is_resource($process)) {
Chris@0:             $info = stream_get_contents($pipes[1]);
Chris@0:             fclose($pipes[1]);
Chris@0:             fclose($pipes[2]);
Chris@0:             proc_close($process);
Chris@0: 
Chris@0:             if (preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) {
Chris@17:                 return [(int) $matches[2], (int) $matches[1]];
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Runs and parses stty -a if it's available, suppressing any error output.
Chris@0:      *
Chris@0:      * @return string|null
Chris@0:      */
Chris@0:     private static function getSttyColumns()
Chris@0:     {
Chris@17:         if (!\function_exists('proc_open')) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@17:         $descriptorspec = [
Chris@17:             1 => ['pipe', 'w'],
Chris@17:             2 => ['pipe', 'w'],
Chris@17:         ];
Chris@0: 
Chris@17:         $process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
Chris@17:         if (\is_resource($process)) {
Chris@0:             $info = stream_get_contents($pipes[1]);
Chris@0:             fclose($pipes[1]);
Chris@0:             fclose($pipes[2]);
Chris@0:             proc_close($process);
Chris@0: 
Chris@0:             return $info;
Chris@0:         }
Chris@0:     }
Chris@0: }