michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 'use strict';
michael@0: 
michael@0: module.metadata = {
michael@0:   'stability': 'unstable'
michael@0: };
michael@0: 
michael@0: const privateNS = require('../../core/namespace').ns();
michael@0: 
michael@0: function getOwnerWindow(thing) {
michael@0:   try {
michael@0:     // check for and return associated window
michael@0:     let fn = (privateNS(thing.prototype) || privateNS(thing) || {}).getOwnerWindow;
michael@0: 
michael@0:     if (fn)
michael@0:       return fn.apply(fn, [thing].concat(arguments));
michael@0:   }
michael@0:   // stuff like numbers and strings throw errors with namespaces
michael@0:   catch(e) {}
michael@0:   // default
michael@0:   return undefined;
michael@0: }
michael@0: getOwnerWindow.define = function(Type, fn) {
michael@0:   privateNS(Type.prototype).getOwnerWindow = fn;
michael@0: }
michael@0: 
michael@0: getOwnerWindow.implement = function(instance, fn) {
michael@0:   privateNS(instance).getOwnerWindow = fn;
michael@0: }
michael@0: 
michael@0: exports.getOwnerWindow = getOwnerWindow;