@globalfishingwatch/react-map-gl/dist/esm/utils/style-utils.js

A React wrapper for MapboxGL-js and overlay API.

import _defineProperty from "@babel/runtime/helpers/esm/defineProperty";

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }

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; }

var refProps = ['type', 'source', 'source-layer', 'minzoom', 'maxzoom', 'filter', 'layout'];
export function normalizeStyle(style) {
  if (!style) {
    return null;
  }

  if (typeof style === 'string') {
    return style;
  }

  if (style.toJS) {
    style = style.toJS();
  }

  var layerIndex = {};

  var _iterator = _createForOfIteratorHelper(style.layers),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var layer = _step.value;
      layerIndex[layer.id] = layer;
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  var layers = style.layers.map(function (layer) {
    var layerRef = layerIndex[layer.ref];
    var normalizedLayer = null;

    if ('interactive' in layer) {
      normalizedLayer = _objectSpread({}, layer);
      delete normalizedLayer.interactive;
    }

    if (layerRef) {
      normalizedLayer = normalizedLayer || _objectSpread({}, layer);
      delete normalizedLayer.ref;

      var _iterator2 = _createForOfIteratorHelper(refProps),
          _step2;

      try {
        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
          var propName = _step2.value;

          if (propName in layerRef) {
            normalizedLayer[propName] = layerRef[propName];
          }
        }
      } catch (err) {
        _iterator2.e(err);
      } finally {
        _iterator2.f();
      }
    }

    return normalizedLayer || layer;
  });
  return _objectSpread(_objectSpread({}, style), {}, {
    layers: layers
  });
}
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