the latest code

vendor/laravel/prompts/src/Themes/Default/Concerns/DrawsScrollbars.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Laravel\Prompts\Themes\Default\Concerns;
+
+use Illuminate\Support\Collection;
+
+trait DrawsScrollbars
+{
+    /**
+     * Render a scrollbar beside the visible items.
+     *
+     * @template T of array<int, string>|\Illuminate\Support\Collection<int, string>
+     *
+     * @param  T  $visible
+     * @return T
+     */
+    protected function scrollbar(array|Collection $visible, int $firstVisible, int $height, int $total, int $width, string $color = 'cyan'): array|Collection
+    {
+        if ($height >= $total) {
+            return $visible;
+        }
+
+        $scrollPosition = $this->scrollPosition($firstVisible, $height, $total);
+
+        $lines = $visible instanceof Collection ? $visible->all() : $visible;
+
+        $result = array_map(fn ($line, $index) => match ($index) {
+            $scrollPosition => preg_replace('/.$/', $this->{$color}('┃'), $this->pad($line, $width)) ?? '',
+            default => preg_replace('/.$/', $this->gray('│'), $this->pad($line, $width)) ?? '',
+        }, array_values($lines), range(0, count($lines) - 1));
+
+        return $visible instanceof Collection ? new Collection($result) : $result; // @phpstan-ignore return.type (https://github.com/phpstan/phpstan/issues/11663)
+    }
+
+    /**
+     * Return the position where the scrollbar "handle" should be rendered.
+     */
+    protected function scrollPosition(int $firstVisible, int $height, int $total): int
+    {
+        if ($firstVisible === 0) {
+            return 0;
+        }
+
+        $maxPosition = $total - $height;
+
+        if ($firstVisible === $maxPosition) {
+            return $height - 1;
+        }
+
+        if ($height <= 2) {
+            return -1;
+        }
+
+        $percent = $firstVisible / $maxPosition;
+
+        return (int) round($percent * ($height - 3)) + 1;
+    }
+}