mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
66 lines
1.6 KiB
JavaScript
66 lines
1.6 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
this.EXPORTED_SYMBOLS = ["EventSource"];
|
|
|
|
Components.utils.import("resource://services-common/utils.js");
|
|
|
|
var EventSource = function (types, suspendFunc, resumeFunc) {
|
|
this.listeners = new Map();
|
|
for (let type of types) {
|
|
this.listeners.set(type, new Set());
|
|
}
|
|
|
|
this.suspend = suspendFunc || function () {};
|
|
this.resume = resumeFunc || function () {};
|
|
|
|
this.addEventListener = this.addEventListener.bind(this);
|
|
this.removeEventListener = this.removeEventListener.bind(this);
|
|
};
|
|
|
|
EventSource.prototype = {
|
|
addEventListener: function (type, listener) {
|
|
if (!this.listeners.has(type)) {
|
|
return;
|
|
}
|
|
this.listeners.get(type).add(listener);
|
|
this.resume();
|
|
},
|
|
|
|
removeEventListener: function (type, listener) {
|
|
if (!this.listeners.has(type)) {
|
|
return;
|
|
}
|
|
this.listeners.get(type).delete(listener);
|
|
if (!this.hasListeners()) {
|
|
this.suspend();
|
|
}
|
|
},
|
|
|
|
hasListeners: function () {
|
|
for (let l of this.listeners.values()) {
|
|
if (l.size > 0) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
},
|
|
|
|
emit: function (type, arg) {
|
|
if (!this.listeners.has(type)) {
|
|
return;
|
|
}
|
|
CommonUtils.nextTick(
|
|
function () {
|
|
for (let listener of this.listeners.get(type)) {
|
|
listener.call(undefined, arg);
|
|
}
|
|
},
|
|
this
|
|
);
|
|
},
|
|
};
|
|
|
|
this.EventSource = EventSource;
|