Scroll Area

"use client";

import { ScrollArea as ScrollAreaPrimitive } from "@base-ui/react/scroll-area";
import { cn } from "cn";
import * as React from "react";

function ScrollArea({
  className,
  children,
  fade = false,
  ...props
}: ScrollAreaPrimitive.Root.Props & { fade?: boolean }) {
  const [progress, setProgress] = React.useState(0);
  return (
    <ScrollAreaPrimitive.Root
      data-slot="scroll-area"
      className={cn("relative", className)}
      {...props}
    >
      <ScrollAreaPrimitive.Viewport
        data-slot="scroll-area-viewport"
        className="size-full rounded-[inherit] transition-[color,box-shadow] outline-none focus-visible:ring-[3px] focus-visible:ring-ring/50 focus-visible:outline-1 motion-reduce:transition-none"
        onScroll={
          fade
            ? (event) =>
                setProgress(
                  Math.min(1, Math.max(0, event.currentTarget.scrollTop) / 24)
                )
            : undefined
        }
      >
        {children}
      </ScrollAreaPrimitive.Viewport>
      {fade && (
        <div
          aria-hidden
          className="pointer-events-none absolute inset-x-0 top-0 z-10 h-6 overflow-hidden rounded-t-[inherit]"
        >
          <div
            className="absolute inset-0 backdrop-blur-[1px] [mask-image:linear-gradient(to_bottom,black,transparent)]"
            style={{ opacity: progress }}
          />
          <div
            className="absolute inset-x-0 top-0 h-4 backdrop-blur-[4px] [mask-image:linear-gradient(to_bottom,black,transparent)]"
            style={{ opacity: progress }}
          />
          <div
            className="absolute inset-0 bg-linear-to-b from-popover to-transparent"
            style={{ opacity: progress }}
          />
        </div>
      )}
      <ScrollBar />
      <ScrollAreaPrimitive.Corner />
    </ScrollAreaPrimitive.Root>
  );
}

function ScrollBar({
  className,
  orientation = "vertical",
  ...props
}: ScrollAreaPrimitive.Scrollbar.Props) {
  return (
    <ScrollAreaPrimitive.Scrollbar
      data-slot="scroll-area-scrollbar"
      data-orientation={orientation}
      orientation={orientation}
      className={cn(
        "flex touch-none p-px transition-colors select-none motion-reduce:transition-none data-horizontal:h-2.5 data-horizontal:flex-col data-horizontal:border-t data-horizontal:border-t-transparent data-vertical:h-full data-vertical:w-2.5 data-vertical:border-l data-vertical:border-l-transparent",
        className
      )}
      {...props}
    >
      <ScrollAreaPrimitive.Thumb
        data-slot="scroll-area-thumb"
        className="relative flex-1 rounded-full bg-border"
      />
    </ScrollAreaPrimitive.Scrollbar>
  );
}

export { ScrollArea, ScrollBar };