addon-sdk/source/lib/sdk/core/reference.js@6474c204b198 (annotated)
addon-sdk/source/lib/sdk/core/reference.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict"; |
| michael@0 | 6 | |
| michael@0 | 7 | module.metadata = { |
| michael@0 | 8 | "stability": "experimental" |
| michael@0 | 9 | }; |
| michael@0 | 10 | |
| michael@0 | 11 | const method = require("../../method/core"); |
| michael@0 | 12 | const { Class } = require("./heritage"); |
| michael@0 | 13 | |
| michael@0 | 14 | // Object that inherit or mix WeakRefence inn will register |
| michael@0 | 15 | // weak observes for system notifications. |
| michael@0 | 16 | const WeakReference = Class({}); |
| michael@0 | 17 | exports.WeakReference = WeakReference; |
| michael@0 | 18 | |
| michael@0 | 19 | |
| michael@0 | 20 | // If `isWeak(object)` is `true` observer installed |
| michael@0 | 21 | // for such `object` will be weak, meaning that it will |
| michael@0 | 22 | // be GC-ed if nothing else but observer is observing it. |
| michael@0 | 23 | // By default everything except `WeakReference` will return |
| michael@0 | 24 | // `false`. |
| michael@0 | 25 | const isWeak = method("reference/weak?"); |
| michael@0 | 26 | exports.isWeak = isWeak; |
| michael@0 | 27 | |
| michael@0 | 28 | isWeak.define(Object, _ => false); |
| michael@0 | 29 | isWeak.define(WeakReference, _ => true); |
