晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/cpanel/ea-wappspector/vendor/symfony/console/Output/ConsoleSectionOutput.php
<?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)));
    }
}

haha - 2025