forked from mirrors/gecko-dev
33 lines
1 KiB
JavaScript
33 lines
1 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
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* vim: sw=2 ts=2 sts=2 et filetype=javascript
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Deprecated utilities for JavaScript components loaded by the JS component
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* loader.
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*/
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const nsIFactoryQI = ChromeUtils.generateQI(["nsIFactory"]);
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export var ComponentUtils = {
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/**
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* Generates a singleton nsIFactory implementation that can be used as
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* an argument to nsIComponentRegistrar.registerFactory.
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* @param aServiceConstructor
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* Constructor function of the component.
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*/
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generateSingletonFactory(aServiceConstructor) {
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return {
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_instance: null,
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createInstance(aIID) {
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if (this._instance === null) {
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this._instance = new aServiceConstructor();
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}
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return this._instance.QueryInterface(aIID);
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},
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QueryInterface: nsIFactoryQI,
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};
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},
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};
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