tools_auto_web/node_modules/rc-image/es/hooks/useStatus.js

import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
import { useEffect, useRef, useState } from 'react';
import { isImageValid } from "../util";
export default function useStatus(_ref) {
  var src = _ref.src,
    isCustomPlaceholder = _ref.isCustomPlaceholder,
    fallback = _ref.fallback;
  var _useState = useState(isCustomPlaceholder ? 'loading' : 'normal'),
    _useState2 = _slicedToArray(_useState, 2),
    status = _useState2[0],
    setStatus = _useState2[1];
  var isLoaded = useRef(false);
  var isError = status === 'error';

  // https://github.com/react-component/image/pull/187
  useEffect(function () {
    var isCurrentSrc = true;
    isImageValid(src).then(function (isValid) {
      // https://github.com/ant-design/ant-design/issues/44948
      // If src changes, the previous setStatus should not be triggered
      if (!isValid && isCurrentSrc) {
        setStatus('error');
      }
    });
    return function () {
      isCurrentSrc = false;
    };
  }, [src]);
  useEffect(function () {
    if (isCustomPlaceholder && !isLoaded.current) {
      setStatus('loading');
    } else if (isError) {
      setStatus('normal');
    }
  }, [src]);
  var onLoad = function onLoad() {
    setStatus('normal');
  };
  var getImgRef = function getImgRef(img) {
    isLoaded.current = false;
    if (status === 'loading' && img !== null && img !== void 0 && img.complete && (img.naturalWidth || img.naturalHeight)) {
      isLoaded.current = true;
      onLoad();
    }
  };
  var srcAndOnload = isError && fallback ? {
    src: fallback
  } : {
    onLoad: onLoad,
    src: src
  };
  return [getImgRef, srcAndOnload, status];
}