120 lines
4.1 KiB
JavaScript
120 lines
4.1 KiB
JavaScript
// (c) Copyright Ascensio System SIA 2009-2024
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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/* eslint-disable no-restricted-globals */
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/* eslint-disable prefer-rest-params */
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/* eslint-disable prefer-spread */
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/* eslint-disable no-underscore-dangle */
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/* eslint-disable @typescript-eslint/no-this-alias */
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(function (global) {
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const channels = [];
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function BroadcastChannel(channel) {
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const $this = this;
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channel = String(channel);
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const id = `$BroadcastChannel$${channel}$`;
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channels[id] = channels[id] || [];
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channels[id].push(this);
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this._name = channel;
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this._id = id;
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this._closed = false;
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this._mc = new MessageChannel();
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this._mc.port1.start();
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this._mc.port2.start();
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global.addEventListener("storage", function (e) {
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if (e.storageArea !== global.localStorage) return;
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if (e.newValue == null || e.newValue === "") return;
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if (e.key.substring(0, id.length) !== id) return;
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const data = JSON.parse(e.newValue);
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$this._mc.port2.postMessage(data);
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});
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}
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BroadcastChannel.prototype = {
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// BroadcastChannel API
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get name() {
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return this._name;
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},
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postMessage(message) {
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const $this = this;
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if (this._closed) {
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const e = new Error();
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e.name = "InvalidStateError";
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throw e;
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}
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const value = JSON.stringify(message);
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// Broadcast to other contexts via storage events...
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const key = `${this._id + String(Date.now())}$${String(Math.random())}`;
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global.localStorage.setItem(key, value);
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setTimeout(function () {
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global.localStorage.removeItem(key);
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}, 500);
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// Broadcast to current context via ports
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channels[this._id].forEach(function (bc) {
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if (bc === $this) return;
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bc._mc.port2.postMessage(JSON.parse(value));
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});
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},
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close() {
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if (this._closed) return;
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this._closed = true;
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this._mc.port1.close();
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this._mc.port2.close();
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const index = channels[this._id].indexOf(this);
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channels[this._id].splice(index, 1);
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},
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// EventTarget API
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get onmessage() {
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return this._mc.port1.onmessage;
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},
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set onmessage(value) {
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this._mc.port1.onmessage = value;
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},
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addEventListener(/* type, listener , useCapture */) {
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return this._mc.port1.addEventListener.apply(this._mc.port1, arguments);
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},
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removeEventListener(/* type, listener , useCapture */) {
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return this._mc.port1.removeEventListener.apply(
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this._mc.port1,
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arguments,
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);
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},
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dispatchEvent(/* event */) {
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return this._mc.port1.dispatchEvent.apply(this._mc.port1, arguments);
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},
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};
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global.BroadcastChannel = global.BroadcastChannel || BroadcastChannel;
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})(self);
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