@rc-component/trigger/es/Popup/Arrow.js

base abstract trigger component for react

import classNames from 'classnames';
import * as React from 'react';
export default function Arrow(props) {
  const {
    prefixCls,
    align,
    arrow,
    arrowPos
  } = props;
  const {
    className,
    content
  } = arrow || {};
  const {
    x = 0,
    y = 0
  } = arrowPos;
  const arrowRef = React.useRef(null);

  // Skip if no align
  if (!align || !align.points) {
    return null;
  }
  const alignStyle = {
    position: 'absolute'
  };

  // Skip if no need to align
  if (align.autoArrow !== false) {
    const popupPoints = align.points[0];
    const targetPoints = align.points[1];
    const popupTB = popupPoints[0];
    const popupLR = popupPoints[1];
    const targetTB = targetPoints[0];
    const targetLR = targetPoints[1];

    // Top & Bottom
    if (popupTB === targetTB || !['t', 'b'].includes(popupTB)) {
      alignStyle.top = y;
    } else if (popupTB === 't') {
      alignStyle.top = 0;
    } else {
      alignStyle.bottom = 0;
    }

    // Left & Right
    if (popupLR === targetLR || !['l', 'r'].includes(popupLR)) {
      alignStyle.left = x;
    } else if (popupLR === 'l') {
      alignStyle.left = 0;
    } else {
      alignStyle.right = 0;
    }
  }
  return /*#__PURE__*/React.createElement("div", {
    ref: arrowRef,
    className: classNames(`${prefixCls}-arrow`, className),
    style: alignStyle
  }, content);
}