Subversion-Projekte lars-tiefland.laravel_shop

<?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 array $content = [];

    private int $lines = 0;

    private array $sections;

    private Terminal $terminal;

    private int $maxHeight = 0;

    /**

     * @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();

    }

    /**

     * Defines a maximum number of lines for this section.

     *

     * When more lines are added, the section will automatically scroll to the

     * end (i.e. remove the first lines to comply with the max height).

     */

    public function setMaxHeight(int $maxHeight): void

    {

        // when changing max height, clear output of current section and redraw again with the new height

        $existingContent = $this->popStreamContentUntilCurrentSection($this->maxHeight ? min($this->maxHeight, $this->lines) : $this->lines);

        $this->maxHeight = $maxHeight;

        parent::doWrite($this->getVisibleContent(), false);

        parent::doWrite($existingContent, false);

    }

    /**

     * 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);

        } else {

            $lines = $this->lines;

            $this->content = [];

        }

        $this->lines -= $lines;

        parent::doWrite($this->popStreamContentUntilCurrentSection($this->maxHeight ? min($this->maxHeight, $lines) : $lines), false);

    }

    /**

     * Overwrites the previous output with a new message.

     */

    public function overwrite(string|iterable $message)

    {

        $this->clear();

        $this->writeln($message);

    }

    public function getContent(): string

    {

        return implode('', $this->content);

    }

    public function getVisibleContent(): string

    {

        if (0 === $this->maxHeight) {

            return $this->getContent();

        }

        return implode('', \array_slice($this->content, -$this->maxHeight));

    }

    /**

     * @internal

     */

    public function addContent(string $input, bool $newline = true): int

    {

        $width = $this->terminal->getWidth();

        $lines = explode(\PHP_EOL, $input);

        $linesAdded = 0;

        $count = \count($lines) - 1;

        foreach ($lines as $i => $lineContent) {

            // re-add the line break (that has been removed in the above `explode()` for

            // - every line that is not the last line

            // - if $newline is required, also add it to the last line

            if ($i < $count || $newline) {

                $lineContent .= \PHP_EOL;

            }

            // skip line if there is no text (or newline for that matter)

            if ('' === $lineContent) {

                continue;

            }

            // For the first line, check if the previous line (last entry of `$this->content`)

            // needs to be continued (i.e. does not end with a line break).

            if (0 === $i

                && (false !== $lastLine = end($this->content))

                && !str_ends_with($lastLine, \PHP_EOL)

            ) {

                // deduct the line count of the previous line

                $this->lines -= (int) ceil($this->getDisplayLength($lastLine) / $width) ?: 1;

                // concatenate previous and new line

                $lineContent = $lastLine.$lineContent;

                // replace last entry of `$this->content` with the new expanded line

                array_splice($this->content, -1, 1, $lineContent);

            } else {

                // otherwise just add the new content

                $this->content[] = $lineContent;

            }

            $linesAdded += (int) ceil($this->getDisplayLength($lineContent) / $width) ?: 1;

        }

        $this->lines += $linesAdded;

        return $linesAdded;

    }

    protected function doWrite(string $message, bool $newline)

    {

        if (!$this->isDecorated()) {

            parent::doWrite($message, $newline);

            return;

        }

        // Check if the previous line (last entry of `$this->content`) needs to be continued

        // (i.e. does not end with a line break). In which case, it needs to be erased first.

        $linesToClear = $deleteLastLine = ($lastLine = end($this->content) ?: '') && !str_ends_with($lastLine, \PHP_EOL) ? 1 : 0;

        $linesAdded = $this->addContent($message, $newline);

        if ($lineOverflow = $this->maxHeight > 0 && $this->lines > $this->maxHeight) {

            // on overflow, clear the whole section and redraw again (to remove the first lines)

            $linesToClear = $this->maxHeight;

        }

        $erasedContent = $this->popStreamContentUntilCurrentSection($linesToClear);

        if ($lineOverflow) {

            // redraw existing lines of the section

            $previousLinesOfSection = \array_slice($this->content, $this->lines - $this->maxHeight, $this->maxHeight - $linesAdded);

            parent::doWrite(implode('', $previousLinesOfSection), false);

        }

        // if the last line was removed, re-print its content together with the new content.

        // otherwise, just print the new content.

        parent::doWrite($deleteLastLine ? $lastLine.$message : $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;

            if ('' !== $sectionContent = $section->getVisibleContent()) {

                if (!str_ends_with($sectionContent, \PHP_EOL)) {

                    $sectionContent .= \PHP_EOL;

                }

                $erasedContent[] = $sectionContent;

            }

        }

        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)));

    }

}