Cursor.php

<?php

/**
 * http://www.termsys.demon.co.uk/vtansi.htm#cursor
 *
 * Class Cursor
 */
class Cursor
{
    /**
     * @var array
     */
    protected $positon = [
        'row' => 0,
        'col' => 0,
    ];

    protected $savedPosition = [
        'row' => 0,
        'col' => 0,
    ];

    protected $highestPosition = [
        'row' => 0,
        'col' => 0,
    ];

    private function update()
    {
        $this->highestPosition['row'] = max($this->highestPosition['row'], $this->positon['row']);
        $this->highestPosition['col'] = max($this->highestPosition['col'], $this->positon['col']);
    }

    public function end()
    {
        $this->moveToLineStart();
        while ($this->highestPosition['row'] > $this->positon['row']) {
            $this->moveDown();
        }
    }

    public function moveAbsolute(int $row, int $col)
    {
        $this->positon['row'] = $row;
        $this->positon['col'] = $col;

        echo "\e[{$row};{$col}H";
    }

    public function savePosition()
    {
        $this->savedPosition = $this->positon;
        echo "\e[s";
    }

    public function restorePosition()
    {
        $this->positon = $this->savedPosition;
        echo "\e[u";
    }

    public function moveUp($lines = 1)
    {
        if (($this->positon['row'] - $lines) < 0) {
            return false;
        }
        $this->positon['row'] -= $lines;
        $this->update();
        echo "\e[{$lines}A";
    }

    public function moveDown($lines = 1)
    {
        $this->positon['row'] += $lines;
        $this->update();
        echo "\e[{$lines}B";
    }

    public function moveLeft($lines = 1)
    {
        if (($this->positon['col'] - $lines) < 0) {
            return false;
        }
        $this->positon['col'] -= $lines;
        $this->update();
        echo "\e[{$lines}D";
    }

    public function moveRight($lines = 1)
    {
        $this->positon['col'] += $lines;
        $this->update();
        echo "\e[{$lines}A";
    }

    public function draw($chars)
    {
        $newlines = substr_count($chars, PHP_EOL);
        $this->positon['row'] += $newlines;
        $this->positon['col'] += mb_strlen($chars);
        $this->update();
        foreach (preg_split('//u', $chars, null, PREG_SPLIT_NO_EMPTY) as $char) {
            usleep(rand(10000, 200000));
            echo $char;
        }
    }

    public function moveToLineStart()
    {
        $this->moveLeft($this->positon['col']);
        $this->positon['col'] = 0;
    }
}

$cursor = new Cursor();

$cursor->draw('XXXXX' . PHP_EOL);
$cursor->savePosition();
$cursor->draw('XXXXX' . PHP_EOL);
$cursor->restorePosition();
$cursor->draw('X---X' . PHP_EOL);
$cursor->moveToLineStart();
$cursor->moveUp();
$cursor->moveUp();
$cursor->draw('0---0' . PHP_EOL);
$cursor->moveAbsolute(1, 1);
$cursor->draw('X');
$cursor->moveAbsolute(1, 3);
$cursor->draw('X');
$cursor->moveAbsolute(10, 30);
$cursor->draw('X');