aboutsummaryrefslogtreecommitdiffstats
path: root/packages/vold-utils/lib/unload+.js
diff options
context:
space:
mode:
Diffstat (limited to 'packages/vold-utils/lib/unload+.js')
-rw-r--r--packages/vold-utils/lib/unload+.js80
1 files changed, 0 insertions, 80 deletions
diff --git a/packages/vold-utils/lib/unload+.js b/packages/vold-utils/lib/unload+.js
deleted file mode 100644
index 285fd46..0000000
--- a/packages/vold-utils/lib/unload+.js
+++ /dev/null
@@ -1,80 +0,0 @@
-/* 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";
-
-const { Class } = require("sdk/core/heritage");
-const unloadNS = require("sdk/core/namespace").ns();
-
-var Unloader = exports.Unloader = Class({
- initialize: function Unloader() {
- let unloaders = unloadNS(this).unloaders = [];
-
- let unloadersUnlaod = unloadNS(this).unloadersUnlaod = function() {
- unloaders.slice().forEach(function(u) u());
- unloaders.length = 0;
- }
-
- require("sdk/system/unload").when(unloadersUnlaod);
- },
- unload: function unload(callback, container) {
- // Calling with no arguments runs all the unloader callbacks
- if (callback == null) {
- unloadNS(this).unloadersUnlaod();
- return null;
- }
-
- var remover = removeUnloader.bind(null, unloader, unloadNS(this).unloaders);
-
- // The callback is bound to the lifetime of the container if we have one
- if (container != null) {
- // Remove the unloader when the container unloads
- container.addEventListener("unload", remover, false);
-
- // Wrap the callback to additionally remove the unload listener
- let origCallback = callback;
- callback = function() {
- container.removeEventListener("unload", remover, false);
- origCallback();
- }
- }
-
- // Wrap the callback in a function that ignores failures
- function unloader() {
- try {
- callback();
- }
- catch(e) {
- console.error(e);
- }
- }
- unloadNS(this).unloaders.push(unloader);
-
- // Provide a way to remove the unloader
- return remover;
- }
-});
-
-function removeUnloader(unloader, unloaders) {
- let index = unloaders.indexOf(unloader);
- if (index != -1)
- unloaders.splice(index, 1);
-}
-
-/**
- * Save callbacks to run when unloading. Optionally scope the callback to a
- * container, e.g., window. Provide a way to run all the callbacks.
- *
- * @usage unload(): Run all callbacks and release them.
- *
- * @usage unload(callback): Add a callback to run on unload.
- * @param [function] callback: 0-parameter function to call on unload.
- * @return [function]: A 0-parameter function that undoes adding the callback.
- *
- * @usage unload(callback, container) Add a scoped callback to run on unload.
- * @param [function] callback: 0-parameter function to call on unload.
- * @param [node] container: Remove the callback when this container unloads.
- * @return [function]: A 0-parameter function that undoes adding the callback.
- */
-const gUnload = Unloader();
-exports.unload = gUnload.unload.bind(gUnload);