@loaders.gl/core/dist/es5/worker-utils/worker-utils.js

Framework-independent loaders for 3D graphics formats

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getTransferList = getTransferList;
exports.getWorkerURL = getWorkerURL;

var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));

var _assert = _interopRequireDefault(require("../utils/assert"));

function getTransferList(object) {
  var recursive = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
  var transfers = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];

  if (!object) {} else if (object instanceof ArrayBuffer) {
    transfers.push(object);
  } else if (object.buffer && object.buffer instanceof ArrayBuffer) {
    transfers.push(object.buffer);
  } else if (recursive && (0, _typeof2["default"])(object) === 'object') {
    for (var key in object) {
      getTransferList(object[key], recursive, transfers);
    }
  }

  return transfers;
}

var workerURLCache = new Map();

function getWorkerURL(workerSource) {
  (0, _assert["default"])(typeof workerSource === 'string', 'worker source');

  if (workerSource.startsWith('url(') && workerSource.endsWith(')')) {
    return workerSource.match(/^url\((.*)\)$/)[1];
  }

  var workerURL = workerURLCache.get(workerSource);

  if (!workerURL) {
    var blob = new Blob([workerSource], {
      type: 'application/javascript'
    });
    workerURL = URL.createObjectURL(blob);
    workerURLCache.set(workerSource, workerURL);
  }

  return workerURL;
}
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