"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 _UndoOutlined = _interopRequireDefault(require("@ant-design/icons/UndoOutlined"));
var _RedoOutlined = _interopRequireDefault(require("@ant-design/icons/RedoOutlined"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
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 && Object.prototype.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(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _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(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
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(arr) { if (Array.isArray(arr)) return arr; }
function ImgView(props) {
  var src = props.src;
  var zoomImg = (0, _react.useRef)();
  var _useState = (0, _react.useState)(0),
    _useState2 = _slicedToArray(_useState, 2),
    angle = _useState2[0],
    setAngle = _useState2[1];
  var _useState3 = (0, _react.useState)(1),
    _useState4 = _slicedToArray(_useState3, 2),
    zoom = _useState4[0],
    setZoom = _useState4[1];
  var iconStyle = {
    fontSize: 20,
    color: '#fff',
    cursor: 'pointer'
  };
  var imgContent = {
    width: '100%',
    textAlign: 'center',
    height: '100%',
    overflow: 'hidden',
    position: 'relative',
    display: 'flex',
    justifyContent: 'center',
    alignItems: 'center'
  };

  // 鼠标滚轮
  function onWheel(e) {
    var wheelDelta = e.nativeEvent.wheelDelta;
    var zoomVal = zoom + wheelDelta / 1200;
    if (zoomVal >= 0.2) {
      setZoom(zoomVal);
    } else {
      setZoom(0.2);
      return false;
    }
  }

  // 鼠标拖拽
  function handleDrag(e) {
    e.persist();
    var _zoomImg$current = zoomImg.current,
      style = _zoomImg$current.style,
      offsetLeft = _zoomImg$current.offsetLeft,
      offsetTop = _zoomImg$current.offsetTop;
    var p = 'onmousemove';
    var x = e.clientX - offsetLeft;
    var y = e.clientY - offsetTop;
    style.position = 'absolute';
    document[p] = function (e) {
      style.left = "".concat(e.clientX - x, "px");
      style.top = "".concat(e.clientY - y, "px");
    };
    document.onmouseup = function () {
      document[p] = null;
    };
  }

  // 渲染旋转
  function renderIndex() {
    var iconWrap = {
      position: 'absolute',
      width: 100,
      left: '50%',
      marginLeft: -50,
      top: 10,
      zIndex: 2,
      display: 'flex',
      justifyContent: 'space-around',
      background: 'rgba(0,0,0,.3)',
      padding: '6px 0',
      color: '#fff',
      borderRadius: 4
    };

    // 旋转切换
    function onSwitch(type) {
      var last = 3;
      var previewAngle;
      if (type === '+') {
        previewAngle = angle + 1;
        previewAngle = previewAngle > last ? 0 : previewAngle;
      } else {
        previewAngle = angle - 1;
        previewAngle = previewAngle < 0 ? last : previewAngle;
      }
      setAngle(previewAngle);
    }
    return /*#__PURE__*/_react["default"].createElement("div", {
      style: iconWrap
    }, /*#__PURE__*/_react["default"].createElement(_UndoOutlined["default"], {
      style: iconStyle,
      onClick: function onClick() {
        return onSwitch('-');
      }
    }), /*#__PURE__*/_react["default"].createElement(_RedoOutlined["default"], {
      style: iconStyle,
      onClick: function onClick() {
        return onSwitch('+');
      }
    }));
  }
  var imgWrap = {
    maxWidth: '100%',
    maxHeight: '100%',
    userSelect: 'none',
    cursor: 'move',
    transform: "rotate(".concat(angle * 90, "deg) scale(").concat(zoom, ")")
  };
  return /*#__PURE__*/_react["default"].createElement("div", {
    style: imgContent,
    onWheel: onWheel
  }, renderIndex(), /*#__PURE__*/_react["default"].createElement("img", {
    ref: zoomImg,
    alt: "example",
    style: imgWrap,
    src: src,
    onDragStart: function onDragStart(e) {
      return e.preventDefault();
    },
    onMouseDown: handleDrag
  }));
}
var _default = exports["default"] = ImgView;
//# sourceMappingURL=index.js.map
