@dnb/eufemia/es/fragments/scroll-view/ScrollView.js

DNB Eufemia Design System UI Library

"use client";

import React from 'react';
import clsx from 'clsx';
import { extendPropsWithContext, validateDOMAttributes } from "../../shared/component-helper.js";
import Context from "../../shared/Context.js";
import { applySpacing } from "../../components/space/SpacingUtils.js";
import { useIsomorphicLayoutEffect as useLayoutEffect } from "../../shared/helpers/useIsomorphicLayoutEffect.js";
import withComponentMarkers from "../../shared/helpers/withComponentMarkers.js";
import { jsx as _jsx } from "react/jsx-runtime";
const defaultProps = {
  children: null
};
function ScrollView(localProps) {
  const context = React.useContext(Context);
  const props = extendPropsWithContext(localProps, defaultProps, context.ScrollView);
  const {
    interactive,
    children,
    className = null,
    ref: refProp,
    ...attributes
  } = props;
  const mainParams = applySpacing(props, {
    ...attributes,
    className: clsx('dnb-scroll-view', className)
  });
  const localRef = React.useRef(undefined);
  mainParams.ref = refProp ? refProp : localRef;
  mainParams.tabIndex = useInteractive({
    interactive,
    children,
    ref: mainParams.ref
  });
  validateDOMAttributes(props, mainParams);
  return _jsx("div", {
    ...mainParams,
    children: children
  });
}
function useInteractive({
  interactive,
  children,
  ref
}) {
  const [isInteractive, setAsInteractive] = React.useState(Boolean(interactive));
  useLayoutEffect(() => {
    if (interactive === 'auto') {
      setAsInteractive(hasScrollbar());
    }
  }, [interactive, children]);
  useLayoutEffect(() => {
    if (interactive === 'auto' && typeof ResizeObserver !== 'undefined') {
      const observer = new ResizeObserver(() => {
        setAsInteractive(hasScrollbar());
      });
      observer.observe(ref.current);
      return () => observer?.disconnect();
    }
    return undefined;
  }, [interactive, ref]);
  if (isInteractive) {
    return 0;
  }
  return undefined;
  function hasScrollbar() {
    if (!ref.current) {
      return true;
    }
    return ref.current.scrollWidth - 1 > ref.current.offsetWidth || ref.current.scrollHeight - 1 > ref.current.offsetHeight;
  }
}
withComponentMarkers(ScrollView, {
  _supportsSpacingProps: true
});
export default ScrollView;
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