"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"));
require("./style");
var _useProps2 = _interopRequireDefault(require("../use-props"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
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; } // 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 = exports["default"] = Sd;
//# sourceMappingURL=ScaleDenominator.js.map
