@thewtex/vtk.js-esm/vendor/webworker-promise/lib/tiny-emitter.js

Visualization Toolkit for the Web

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var TinyEmitter = function () {
  function TinyEmitter() {
    _classCallCheck(this, TinyEmitter);

    Object.defineProperty(this, '__listeners', {
      value: {},
      enumerable: false,
      writable: false
    });
  }

  _createClass(TinyEmitter, [{
    key: 'emit',
    value: function emit(eventName) {
      if (!this.__listeners[eventName]) return this;

      for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }

      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        for (var _iterator = this.__listeners[eventName][Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var handler = _step.value;

          handler.apply(undefined, args);
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator.return) {
            _iterator.return();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }

      return this;
    }
  }, {
    key: 'once',
    value: function once(eventName, handler) {
      var _this = this;

      var once = function once() {
        _this.off(eventName, once);
        handler.apply(undefined, arguments);
      };

      return this.on(eventName, once);
    }
  }, {
    key: 'on',
    value: function on(eventName, handler) {
      if (!this.__listeners[eventName]) this.__listeners[eventName] = [];

      this.__listeners[eventName].push(handler);

      return this;
    }
  }, {
    key: 'off',
    value: function off(eventName, handler) {
      if (handler) this.__listeners[eventName] = this.__listeners[eventName].filter(function (h) {
        return h !== handler;
      });else this.__listeners[eventName] = [];

      return this;
    }
  }]);

  return TinyEmitter;
}();

var tinyEmitter = TinyEmitter;

export { tinyEmitter as t };