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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Output;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Formatter\OutputFormatterInterface;
use Symfony\Component\Console\Output\ConsoleOutput;
/**
* A ConsoleOutput subclass specifically for Psy Shell output.
*/
class ShellOutput extends ConsoleOutput
{
const NUMBER_LINES = 128;
private $paging = 0;
/** @var OutputPager */
private $pager;
/** @var Theme */
private $theme;
/**
* Construct a ShellOutput instance.
*
* @param mixed $verbosity (default: self::VERBOSITY_NORMAL)
* @param bool|null $decorated (default: null)
* @param OutputFormatterInterface|null $formatter (default: null)
* @param string|OutputPager|null $pager (default: null)
*/
public function __construct($verbosity = self::VERBOSITY_NORMAL, $decorated = null, OutputFormatterInterface $formatter = null, $pager = null, $theme = null)
{
parent::__construct($verbosity, $decorated, $formatter);
$this->theme = $theme ?? new Theme('modern');
$this->initFormatters();
if ($pager === null) {
$this->pager = new PassthruPager($this);
} elseif (\is_string($pager)) {
$this->pager = new ProcOutputPager($this, $pager);
} elseif ($pager instanceof OutputPager) {
$this->pager = $pager;
} else {
throw new \InvalidArgumentException('Unexpected pager parameter: '.$pager);
}
}
/**
* Page multiple lines of output.
*
* The output pager is started
*
* If $messages is callable, it will be called, passing this output instance
* for rendering. Otherwise, all passed $messages are paged to output.
*
* Upon completion, the output pager is flushed.
*
* @param string|array|\Closure $messages A string, array of strings or a callback
* @param int $type (default: 0)
*/
public function page($messages, int $type = 0)
{
if (\is_string($messages)) {
$messages = (array) $messages;
}
if (!\is_array($messages) && !\is_callable($messages)) {
throw new \InvalidArgumentException('Paged output requires a string, array or callback');
}
$this->startPaging();
if (\is_callable($messages)) {
$messages($this);
} else {
$this->write($messages, true, $type);
}
$this->stopPaging();
}
/**
* Start sending output to the output pager.
*/
public function startPaging()
{
$this->paging++;
}
/**
* Stop paging output and flush the output pager.
*/
public function stopPaging()
{
$this->paging--;
$this->closePager();
}
/**
* Writes a message to the output.
*
* Optionally, pass `$type | self::NUMBER_LINES` as the $type parameter to
* number the lines of output.
*
* @throws \InvalidArgumentException When unknown output type is given
*
* @param string|array $messages The message as an array of lines or a single string
* @param bool $newline Whether to add a newline or not
* @param int $type The type of output
*/
public function write($messages, $newline = false, $type = 0)
{
if ($this->getVerbosity() === self::VERBOSITY_QUIET) {
return;
}
$messages = (array) $messages;
if ($type & self::NUMBER_LINES) {
$pad = \strlen((string) \count($messages));
$template = $this->isDecorated() ? "<aside>%{$pad}s</aside>: %s" : "%{$pad}s: %s";
if ($type & self::OUTPUT_RAW) {
$messages = \array_map([OutputFormatter::class, 'escape'], $messages);
}
foreach ($messages as $i => $line) {
$messages[$i] = \sprintf($template, $i, $line);
}
// clean this up for super.
$type = $type & ~self::NUMBER_LINES & ~self::OUTPUT_RAW;
}
parent::write($messages, $newline, $type);
}
/**
* Writes a message to the output.
*
* Handles paged output, or writes directly to the output stream.
*
* @param string $message A message to write to the output
* @param bool $newline Whether to add a newline or not
*/
public function doWrite($message, $newline)
{
if ($this->paging > 0) {
$this->pager->doWrite($message, $newline);
} else {
parent::doWrite($message, $newline);
}
}
/**
* Set the output Theme.
*/
public function setTheme(Theme $theme)
{
$this->theme = $theme;
$this->initFormatters();
}
/**
* Flush and close the output pager.
*/
private function closePager()
{
if ($this->paging <= 0) {
$this->pager->close();
}
}
/**
* Initialize output formatter styles.
*/
private function initFormatters()
{
$useGrayFallback = !$this->grayExists();
$this->theme->applyStyles($this->getFormatter(), $useGrayFallback);
$this->theme->applyErrorStyles($this->getErrorOutput()->getFormatter(), $useGrayFallback);
}
/**
* Checks if the "gray" color exists on the output.
*/
private function grayExists(): bool
{
try {
$this->write('<fg=gray></>');
} catch (\InvalidArgumentException $e) {
return false;
}
return true;
}
}