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

DNB Eufemia Design System UI Library

"use client";

import _extends from "@babel/runtime-corejs3/helpers/esm/extends";
import React from 'react';
import classnames from 'classnames';
import { extendPropsWithContext, validateDOMAttributes } from "../../shared/component-helper.js";
import Context from "../../shared/Context.js";
import { createSpacingClasses } from "../../components/space/SpacingHelper.js";
import { useIsomorphicLayoutEffect as useLayoutEffect } from "../../shared/helpers/useIsomorphicLayoutEffect.js";
const defaultProps = {
  children: null
};
function ScrollView(localProps) {
  const context = React.useContext(Context);
  const props = extendPropsWithContext(localProps, defaultProps, context.ScrollView);
  const {
    interactive,
    children,
    className = null,
    innerRef,
    ...attributes
  } = props;
  const mainParams = {
    className: classnames('dnb-scroll-view', createSpacingClasses(props), className),
    ...attributes
  };
  const ref = React.useRef();
  mainParams.ref = innerRef ? innerRef : ref;
  mainParams.tabIndex = useInteractive({
    interactive,
    children,
    ref: mainParams.ref
  });
  validateDOMAttributes(props, mainParams);
  return React.createElement("div", mainParams, 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 === null || observer === void 0 ? void 0 : observer.disconnect();
    }
  }, [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;
  }
}
const ScrollViewWithRef = React.forwardRef((props, ref) => {
  return React.createElement(ScrollView, _extends({}, props, {
    innerRef: props.innerRef || ref
  }));
});
ScrollView._supportsSpacingProps = true;
ScrollViewWithRef['_supportsSpacingProps'] = true;
export default ScrollViewWithRef;
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