"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
var _react = _interopRequireWildcard(require("react"));
require("./style");
var _useProps2 = _interopRequireDefault(require("../use-props"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0); } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i["return"] && (_r = _i["return"](), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; } // 计算视野高度的组件
var count2 = function count2(map, setHeight) {
  var view = map.getView();
  var resolution = view.getResolution();
  var projection = view.getProjection();
  if (!resolution || !projection) return;
  var inchesPerMeter = 39.37;
  var dpi = 90.7; // GeoServer标准DPI
  // 使用投影单位计算
  var units = projection.getUnits();
  var scaleDenominator;
  if (units === 'degrees') {
    // 如果是经纬度投影，需要转换
    var center = view.getCenter();
    if (center) {
      // 使用中心点纬度计算米/度的转换因子
      var metersPerUnit = projection.getMetersPerUnit();
      scaleDenominator = resolution * metersPerUnit * inchesPerMeter * dpi;
    }
  } else {
    // 其他单位（如米）直接计算
    scaleDenominator = resolution * inchesPerMeter * dpi;
  }
  setHeight(scaleDenominator);
};

//偏小
var Sd = function Sd() {
  var _useProps = (0, _useProps2["default"])(),
    map = _useProps.map;
  var _useState = (0, _react.useState)(0),
    _useState2 = _slicedToArray(_useState, 2),
    height2 = _useState2[0],
    setHeight2 = _useState2[1];
  var timeRef = (0, _react.useRef)(null);
  (0, _react.useEffect)(function () {
    if (map) {
      //监测地图zoom改变
      map.getView().on('change:resolution', function () {
        if (timeRef.current) {
          clearTimeout(timeRef.current);
          count2(map, setHeight2);
        }
        timeRef.current = setTimeout(function () {}, 50);
      });
    }
  }, [map]);
  return /*#__PURE__*/_react["default"].createElement(_react["default"].Fragment, null, height2);
};
var _default = Sd;
exports["default"] = _default;
//# sourceMappingURL=ScaleDenominator.js.map
