var _excluded = ["root", "lazy", "src", "style", "className"];

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? Object(arguments[i]) : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys.push.apply(ownKeys, Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import classNames from 'classnames';
import PropTypes from 'prop-types';
import React, { Component } from 'react';
import styles from './index.less';
export var Image = /*#__PURE__*/function (_Component) {
  _inherits(Image, _Component);

  var _super = _createSuper(Image);

  function Image() {
    var _this;

    _classCallCheck(this, Image);

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _super.call.apply(_super, [this].concat(args));

    _defineProperty(_assertThisInitialized(_this), "state", {
      show: false
    });

    _defineProperty(_assertThisInitialized(_this), "imageRef", React.createRef());

    _defineProperty(_assertThisInitialized(_this), "intersectionObserver", null);

    return _this;
  }

  _createClass(Image, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      var _this2 = this;

      this.intersectionObserver = new IntersectionObserver(function (entries) {
        if (entries[0].isIntersecting) {
          _this2.setState({
            show: true
          });
        }
      }, {
        root: this.props.rootContainer(),
        // threshold: 0.8,
        rootMargin: '0px 0px 100px 0px'
      });
      this.intersectionObserver.observe(this.imageRef.current);
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      this.intersectionObserver.disconnect(this.imageRef.current);
    }
  }, {
    key: "render",
    value: function render() {
      var _this$props = this.props,
          root = _this$props.root,
          lazy = _this$props.lazy,
          src = _this$props.src,
          style = _this$props.style,
          className = _this$props.className,
          rest = _objectWithoutProperties(_this$props, _excluded);

      var show = this.state.show;
      var isShow = lazy ? show : true;
      return /*#__PURE__*/React.createElement("img", _extends({
        ref: this.imageRef,
        className: classNames(styles.container, className),
        style: _objectSpread({
          opacity: ~~isShow
        }, style),
        src: isShow ? src : '',
        alt: ""
      }, rest));
    }
  }]);

  return Image;
}(Component);
Image.propTypes = {
  /** 外层容器 */
  rootContainer: PropTypes.func,

  /** src */
  src: PropTypes.string,

  /** 懒加载 */
  lazy: PropTypes.bool,

  /** style */
  style: PropTypes.object
};
Image.defaultProps = {
  rootContainer: function rootContainer() {
    return null;
  },
  lazy: true,
  src: '',
  style: {}
};
export default Image;