image-js/lib/browser/worker/worker.js

Image processing and manipulation in JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _webWorkerManager = _interopRequireDefault(require("web-worker-manager"));
var _extend = _interopRequireDefault(require("./extend"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
class Worker {
  constructor() {
    this._url = null;
    this._deps = [null];
  }
  checkUrl() {
    if (this._url === null) {
      throw new Error('image worker must be initialized with an URL');
    }
  }
  get url() {
    return this._url;
  }
  set url(value) {
    if (typeof value !== 'string') {
      throw new TypeError('worker URL must be a string');
    }
    this._url = value;
    this._deps[0] = value;
  }
  static extendMethod(name, method) {
    let manager;
    let url;
    let runner = {};
    function run(...args) {
      if (!manager) {
        this.checkUrl();
        url = this.url;
        manager = new _webWorkerManager.default(method.work, {
          deps: url
        });
        runner.manager = manager;
      }
      return method.run.call(runner, ...args);
    }
    run.reset = function () {
      if (manager) {
        manager.terminate();
        manager = new _webWorkerManager.default(method.work, {
          deps: url
        });
        runner.manager = manager;
      }
    };
    Worker.prototype[name] = run;
  }
}
(0, _extend.default)(Worker);
var _default = exports.default = new Worker();