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<?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\Output;
use Symfony\Component\Console\Formatter\OutputFormatterInterface;
use Symfony\Component\Console\Helper\Helper;
use Symfony\Component\Console\Terminal;
/**
* @author Pierre du Plessis <pdples@gmail.com>
* @author Gabriel Ostrolucký <gabriel.ostrolucky@gmail.com>
*/
class ConsoleSectionOutput extends StreamOutput
{
private $content = [];
private $lines = 0;
private $sections;
private $terminal;
/**
* @param resource $stream
* @param ConsoleSectionOutput[] $sections
*/
public function __construct($stream, array &$sections, int $verbosity, bool $decorated, OutputFormatterInterface $formatter)
{
parent::__construct($stream, $verbosity, $decorated, $formatter);
array_unshift($sections, $this);
$this->sections = &$sections;
$this->terminal = new Terminal();
}
/**
* Clears previous output for this section.
*
* @param int $lines Number of lines to clear. If null, then the entire output of this section is cleared
*/
public function clear(int $lines = null)
{
if (empty($this->content) || !$this->isDecorated()) {
return;
}
if ($lines) {
array_splice($this->content, -($lines * 2)); // Multiply lines by 2 to cater for each new line added between content
} else {
$lines = $this->lines;
$this->content = [];
}
$this->lines -= $lines;
parent::doWrite($this->popStreamContentUntilCurrentSection($lines), false);
}
/**
* Overwrites the previous output with a new message.
*
* @param array|string $message
*/
public function overwrite($message)
{
$this->clear();
$this->writeln($message);
}
public function getContent(): string
{
return implode('', $this->content);
}
/**
* @internal
*/
public function addContent(string $input)
{
foreach (explode(\PHP_EOL, $input) as $lineContent) {
$this->lines += ceil($this->getDisplayLength($lineContent) / $this->terminal->getWidth()) ?: 1;
$this->content[] = $lineContent;
$this->content[] = \PHP_EOL;
}
}
/**
* {@inheritdoc}
*/
protected function doWrite(string $message, bool $newline)
{
if (!$this->isDecorated()) {
parent::doWrite($message, $newline);
return;
}
$erasedContent = $this->popStreamContentUntilCurrentSection();
$this->addContent($message);
parent::doWrite($message, true);
parent::doWrite($erasedContent, false);
}
/**
* At initial stage, cursor is at the end of stream output. This method makes cursor crawl upwards until it hits
* current section. Then it erases content it crawled through. Optionally, it erases part of current section too.
*/
private function popStreamContentUntilCurrentSection(int $numberOfLinesToClearFromCurrentSection = 0): string
{
$numberOfLinesToClear = $numberOfLinesToClearFromCurrentSection;
$erasedContent = [];
foreach ($this->sections as $section) {
if ($section === $this) {
break;
}
$numberOfLinesToClear += $section->lines;
$erasedContent[] = $section->getContent();
}
if ($numberOfLinesToClear > 0) {
// move cursor up n lines
parent::doWrite(sprintf("\x1b[%dA", $numberOfLinesToClear), false);
// erase to end of screen
parent::doWrite("\x1b[0J", false);
}
return implode('', array_reverse($erasedContent));
}
private function getDisplayLength(string $text): int
{
return Helper::width(Helper::removeDecoration($this->getFormatter(), str_replace("\t", ' ', $text)));
}
}