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<?php |
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namespace Graze\DiffRenderer\Terminal; |
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/** |
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* Class TerminalDimensions |
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* |
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* Copied from symfony/console/Terminal |
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*/ |
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class TerminalDimensions implements DimensionsInterface |
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{ |
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/** @var int|null */ |
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private $width = null; |
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/** @var int|null */ |
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private $height = null; |
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/** @var bool */ |
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private $initialised = false; |
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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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public function getWidth() |
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{ |
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if (null === $this->width && !$this->initialised) { |
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$this->refreshDimensions(); |
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} |
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if (null === $this->width) { |
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$width = getenv('COLUMNS'); |
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if (false !== $width) { |
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$this->width = (int) trim($width); |
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} |
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} |
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return $this->width ?: static::DEFAULT_WIDTH; |
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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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public function getHeight() |
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{ |
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if (null === $this->height && !$this->initialised) { |
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$this->refreshDimensions(); |
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} |
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if (null === $this->height) { |
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$height = getenv('LINES'); |
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if (false !== $height) { |
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$this->height = (int) trim($height); |
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} |
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} |
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return $this->height ?: static::DEFAULT_HEIGHT; |
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} |
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/** |
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* Refresh the current dimensions from the terminal |
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*/ |
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public function refreshDimensions() |
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{ |
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if ('\\' === DIRECTORY_SEPARATOR) { |
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if (preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim(getenv('ANSICON')), $matches)) { |
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// extract [w, H] from "wxh (WxH)" |
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// or [w, h] from "wxh" |
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$this->width = (int) $matches[1]; |
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$this->height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2]; |
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} elseif (null !== $dimensions = $this->getConsoleMode()) { |
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// extract [w, h] from "wxh" |
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$this->width = (int) $dimensions[0]; |
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$this->height = (int) $dimensions[1]; |
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} |
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} elseif ($sttyString = $this->getSttyColumns()) { |
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if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) { |
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// extract [w, h] from "rows h; columns w;" |
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$this->width = (int) $matches[2]; |
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$this->height = (int) $matches[1]; |
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} elseif (preg_match('/;.(\d+).rows;.(\d+).columns/i', $sttyString, $matches)) { |
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// extract [w, h] from "; h rows; w columns" |
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$this->width = (int) $matches[2]; |
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$this->height = (int) $matches[1]; |
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} |
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} |
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$this->initialised = true; |
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} |
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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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private function getConsoleMode() |
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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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$spec = [ |
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1 => ['pipe', 'w'], |
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2 => ['pipe', 'w'], |
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]; |
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$process = proc_open('mode CON', $spec, $pipes, null, null, ['suppress_errors' => true]); |
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if (is_resource($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 (preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) { |
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return [(int) $matches[2], (int) $matches[1]]; |
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} |
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} |
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return null; |
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} |
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/** |
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* Runs and parses stty -a if it's available, suppressing any error output. |
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* |
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* @return string|null |
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*/ |
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private function getSttyColumns() |
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{ |
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if (!function_exists('proc_open')) { |
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return null; |
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} |
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$spec = [ |
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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('stty -a | grep columns', $spec, $pipes, null, null, ['suppress_errors' => true]); |
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if (is_resource($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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return $info; |
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} |
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return null; |
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} |
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} |
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graze /
console-diff-renderer
