mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
37 lines
1014 B
JavaScript
37 lines
1014 B
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/. */
|
|
|
|
"use strict";
|
|
|
|
this.EXPORTED_SYMBOLS = ["PromiseMessage"];
|
|
|
|
var msgId = 0;
|
|
|
|
var PromiseMessage = {
|
|
send(messageManager, name, data = {}) {
|
|
let id = msgId++;
|
|
|
|
// Make a copy of data so that the caller doesn't see us setting 'id'.
|
|
let dataCopy = {};
|
|
for (let prop in data) {
|
|
dataCopy[prop] = data[prop];
|
|
}
|
|
dataCopy.id = id;
|
|
|
|
// Send the message.
|
|
messageManager.sendAsyncMessage(name, dataCopy);
|
|
|
|
// Return a promise that resolves when we get a reply (a message of the same name).
|
|
return new Promise(resolve => {
|
|
messageManager.addMessageListener(name, function listener(reply) {
|
|
if (reply.data.id !== id) {
|
|
return;
|
|
}
|
|
messageManager.removeMessageListener(name, listener);
|
|
resolve(reply);
|
|
});
|
|
});
|
|
}
|
|
};
|