diff options
Diffstat (limited to 'tools/addon-sdk-1.7/packages/api-utils/lib/namespace.js')
-rw-r--r-- | tools/addon-sdk-1.7/packages/api-utils/lib/namespace.js | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/tools/addon-sdk-1.7/packages/api-utils/lib/namespace.js b/tools/addon-sdk-1.7/packages/api-utils/lib/namespace.js deleted file mode 100644 index 612910d..0000000 --- a/tools/addon-sdk-1.7/packages/api-utils/lib/namespace.js +++ /dev/null @@ -1,43 +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"; - -// This is a temporary workaround until bug 673468 is fixed, which causes -// entries associated with `XPCWrappedNative` wrapped keys to be GC-ed. To -// workaround that we create a cross reference with an object from the same -// compartment as `WeakMap` and use that as a key. Cross reference prevents -// wrapper to be GC-ed until reference to it's value is kept. -function handle(target) { - return target[handle.key] || Object.defineProperty(target, handle.key, { - value: { '::': target }, - enumerable: false, - configurable: false, - writable: false - })[handle.key]; -} -handle.key = '::ns::' + Math.round(Math.random() * 100000000000000000); - -/** - * Function creates a new namespace. Optionally `prototype` object may be - * passed, in which case namespace objects will inherit from it. Returned value - * is a function that can be used to get access to the namespaced properties - * for the passed object. - * @examples - * const ns = Namespace(); - * ns(myObject).secret = secret; - */ -exports.Namespace = function Namespace(prototype) { - prototype = prototype || Object.prototype; - const map = new WeakMap(); - return function namespace(target) { - let key = handle(target); - return map.get(key) || - map.set(key, Object.create(prototype)), map.get(key); - }; -}; - -// `Namespace` is a e4x function in the scope, so we export the function also as -// `ns` as alias to avoid clashing. -exports.ns = exports.Namespace; |