83 lines
3.4 KiB
JavaScript
83 lines
3.4 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.createSafeEmitter = createSafeEmitter;
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exports["default"] = void 0;
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function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { 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 it, 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; } } }; }
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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(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
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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; }
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// NB: this is a limited functionality version of EventEmitter safe for passing over contextBridge
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function createSafeEmitter() {
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var callbackMap = new Map();
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var addListener = function addListener(name, listener, once) {
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var listeners = callbackMap[name];
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if (listeners == null) {
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listeners = callbackMap[name] = new Set();
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}
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if (once) {
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var originalListener = listener;
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listener = function listener() {
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originalListener.apply(void 0, arguments);
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listeners["delete"](originalListener);
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};
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}
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listeners.add(listener);
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};
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var invokeListener = function invokeListener(name) {
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var listeners = callbackMap[name];
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if (listeners == null) {
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return;
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}
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for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
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args[_key - 1] = arguments[_key];
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}
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var _iterator = _createForOfIteratorHelper(listeners),
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_step;
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try {
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for (_iterator.s(); !(_step = _iterator.n()).done;) {
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var listener = _step.value;
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listener.apply(void 0, args);
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}
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} catch (err) {
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_iterator.e(err);
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} finally {
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_iterator.f();
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}
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};
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return {
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on: function on(name, callback) {
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return addListener(name, callback, false);
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},
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once: function once(name, callback) {
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return addListener(name, callback, true);
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},
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emit: function emit(name) {
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for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
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args[_key2 - 1] = arguments[_key2];
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}
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return invokeListener.apply(void 0, [name].concat(args));
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}
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};
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}
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var _default = createSafeEmitter;
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exports["default"] = _default;
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