tntd/es/img/Cover.js

tntd是基于 TNT Design 设计体系的 React UI 组件库，主要用于研发企业级中后台产品。

"use strict";

function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
var _react = _interopRequireWildcard(require("react"));
var _classnames = _interopRequireDefault(require("classnames"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { "default": e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n["default"] = e, t && t.set(e, n), n; }
function _slicedToArray(r, e) { return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(r) { if (Array.isArray(r)) return r; }
var __rest = void 0 && (void 0).__rest || function (s, e) {
  var t = {};
  for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0) t[p] = s[p];
  if (s != null && typeof Object.getOwnPropertySymbols === "function") for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
    if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i])) t[p[i]] = s[p[i]];
  }
  return t;
};
var _default = exports["default"] = function _default(props) {
  var alt = props.alt,
    title = props.title,
    src = props.src,
    width = props.width,
    height = props.height,
    _props$style = props.style,
    style = _props$style === void 0 ? {} : _props$style,
    className = props.className,
    onError = props.onError,
    shape = props.shape,
    errorImgSrc = props.errorImgSrc,
    type = props.type,
    others = __rest(props, ["alt", "title", "src", "width", "height", "style", "className", "onError", "shape", "errorImgSrc", "type"]);
  var imgRef = (0, _react.useRef)();
  var _useState = (0, _react.useState)({
      display: 'block',
      maxWidth: 'none',
      width: 'auto',
      height: 'auto',
      // transition: 'opacity 0.2s ease',
      opacity: 0
    }),
    _useState2 = _slicedToArray(_useState, 2),
    imgStyles = _useState2[0],
    setImgStyles = _useState2[1];
  var getStyles = function getStyles(wrapWidth, wrapHeight, imgWidth, imgHeight) {
    // 进行等比运算
    var wrapRatio = wrapWidth / wrapHeight;
    var imgRatio = imgWidth / imgHeight;
    var finalWidth = 0;
    var finalHeight = 0;
    var finalMarginTop = 0;
    var finalMarginLeft = 0;
    if (wrapRatio > imgRatio) {
      // 父框宽度更大，以父框的宽度为准，拉伸图片上移
      finalWidth = wrapWidth;
      finalHeight = finalWidth / imgRatio;
      finalMarginTop = (finalHeight - wrapHeight) / 2 * -1;
    } else {
      // 父框高度更大，以父框高度为准，拉伸图片左移动
      finalHeight = wrapHeight;
      finalWidth = finalHeight * imgRatio;
      finalMarginLeft = (finalWidth - wrapWidth) / 2 * -1;
    }
    return {
      height: finalHeight,
      width: finalWidth,
      marginLeft: finalMarginLeft,
      marginTop: finalMarginTop
    };
  };
  var imgOnload = function imgOnload() {
    var imgDOM = imgRef.current;
    var width = props.width,
      height = props.height;
    var imgWidth = imgDOM.width;
    var imgHeight = imgDOM.height;
    var imgStyles2 = getStyles(width, height, imgWidth, imgHeight);
    setImgStyles(Object.assign(Object.assign(Object.assign({}, imgStyles), imgStyles2), {
      opacity: 1
    }));
  };
  (0, _react.useEffect)(function () {
    if (width || height) {
      imgOnload();
    }
  }, [width, height]);
  var styles = Object.assign(Object.assign({}, style), {
    display: 'inline-block',
    overflow: 'hidden',
    width: width,
    height: height
  });
  if (shape === 'rounded') {
    styles.borderRadius = '5px';
  } else if (shape === 'circle') {
    styles.borderRadius = '50%';
  }
  var cls = (0, _classnames["default"])('tntd-img', shape, className);
  return _react["default"].createElement("div", Object.assign({
    className: cls,
    style: styles
  }, others), _react["default"].createElement("img", {
    style: imgStyles,
    onError: onError,
    ref: imgRef,
    src: src,
    alt: alt,
    title: title,
    onLoad: imgOnload
  }));
};