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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
* vim: sw=2 ts=2 sts=2 et filetype=javascript
* 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
/**
* Deprecated utilities for JavaScript components loaded by the JS component
* loader.
*/
const nsIFactoryQI = ChromeUtils.generateQI(["nsIFactory"]);
export var ComponentUtils = {
/**
* Generates a singleton nsIFactory implementation that can be used as
* an argument to nsIComponentRegistrar.registerFactory.
* @param aServiceConstructor
* Constructor function of the component.
*/
generateSingletonFactory(aServiceConstructor) {
return {
_instance: null,
createInstance(aIID) {
if (this._instance === null) {
this._instance = new aServiceConstructor();
}
return this._instance.QueryInterface(aIID);
},
QueryInterface: nsIFactoryQI,
};
},
};