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<?php declare(strict_types=1); |
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namespace AlecRabbit\ConsoleColour\Core; |
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/** |
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* Class Terminal |
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* |
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* Reference: Symfony\Component\Console\Terminal::class |
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* https://github.com/symfony/console |
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* |
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* @author Fabien Potencier <[email protected]> |
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* |
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* @author AlecRabbit |
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*/ |
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abstract class AbstractTerminal extends AbstractColorSupportingTerminal |
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{ |
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protected const DEFAULT_WIDTH = 80; |
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protected const DEFAULT_HEIGHT = 50; |
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protected const ENV_COLUMNS = 'COLUMNS'; |
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protected const ENV_LINES = 'LINES'; |
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/** @var null|int */ |
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protected static $width; |
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/** @var null|int */ |
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protected static $height; |
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/** |
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* @codeCoverageIgnore |
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*/ |
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protected static function initDimensions(): void |
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{ |
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if (static::onWindows()) { |
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self::initDimensionsWindows(); |
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} elseif ($sttyString = static::getSttyColumns()) { |
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self::initDimensionsUnix($sttyString); |
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} |
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} |
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/** |
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* @codeCoverageIgnore |
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*/ |
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protected static function initDimensionsWindows(): void |
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{ |
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if ((false !== $term = getenv(static::ENV_ANSICON)) && |
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preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim($term), $matches)) { |
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// extract [w, H] from "wxh (WxH)" |
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// or [w, h] from "wxh" |
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static::$width = (int)$matches[1]; |
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static::$height = isset($matches[4]) ? (int)$matches[4] : (int)$matches[2]; |
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} elseif (null !== $dimensions = static::getConsoleMode()) { |
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// extract [w, h] from "wxh" |
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static::$width = (int)$dimensions[0]; |
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static::$height = (int)$dimensions[1]; |
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} |
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} |
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/** |
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* @codeCoverageIgnore |
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* |
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* Runs and parses mode CON if it's available, suppressing any error output. |
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* |
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* @return int[]|null An array composed of the width and the height or null if it could not be parsed |
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*/ |
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protected static function getConsoleMode(): ?array |
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{ |
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if (!\function_exists('proc_open')) { |
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return null; |
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} |
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$descriptorSpec = [ |
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1 => ['pipe', 'w'], |
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2 => ['pipe', 'w'], |
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]; |
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$process = |
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proc_open('mode CON', $descriptorSpec, $pipes, null, null, ['suppress_errors' => true]); |
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if (\is_resource($process)) { |
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$info = stream_get_contents($pipes[1]); |
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fclose($pipes[1]); |
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fclose($pipes[2]); |
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proc_close($process); |
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if (false !== $info && preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) { |
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return [(int)$matches[2], (int)$matches[1]]; |
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} |
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} |
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return null; |
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} |
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/** |
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* @codeCoverageIgnore |
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* |
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* Runs and parses stty -a if it's available, suppressing any error output. |
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* |
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* @return string|null |
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*/ |
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protected static function getSttyColumns(): ?string |
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{ |
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if (!\function_exists('proc_open')) { |
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return null; |
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} |
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$descriptorSpec = [ |
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1 => ['pipe', 'w'], |
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2 => ['pipe', 'w'], |
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]; |
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$process = proc_open( |
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'stty -a | grep columns', |
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$descriptorSpec, |
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$pipes, |
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null, |
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null, |
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['suppress_errors' => true] |
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); |
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if (\is_resource($process)) { |
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$info = stream_get_contents($pipes[1]); |
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fclose($pipes[1]); |
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fclose($pipes[2]); |
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proc_close($process); |
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return $info ?: null; |
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} |
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return null; |
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} |
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/** |
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* @codeCoverageIgnore |
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* @param string $sttyString |
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*/ |
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protected static function initDimensionsUnix(string $sttyString): void |
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{ |
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if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) { |
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// extract [w, h] from "rows h; columns w;" |
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static::$width = (int)$matches[2]; |
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static::$height = (int)$matches[1]; |
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} elseif (preg_match('/;.(\d+).rows;.(\d+).columns/i', $sttyString, $matches)) { |
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// extract [w, h] from "; h rows; w columns" |
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static::$width = (int)$matches[2]; |
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static::$height = (int)$matches[1]; |
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} |
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} |
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/** |
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* Gets the terminal width. |
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* |
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* @return int |
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*/ |
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protected function getWidth(): int |
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{ |
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$width = getenv(static::ENV_COLUMNS); |
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if (false !== $width) { |
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return (int)trim($width); |
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} |
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// @codeCoverageIgnoreStart |
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if (null === static::$width) { |
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static::initDimensions(); |
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} |
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return static::$width ?: static::DEFAULT_WIDTH; |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* Gets the terminal height. |
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* |
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* @return int |
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*/ |
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protected function getHeight(): int |
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{ |
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$height = getenv(static::ENV_LINES); |
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if (false !== $height) { |
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return (int)trim($height); |
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} |
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// @codeCoverageIgnoreStart |
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if (null === static::$height) { |
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static::initDimensions(); |
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} |
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return static::$height ?: static::DEFAULT_HEIGHT; |
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// @codeCoverageIgnoreEnd |
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} |
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} |
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