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: 
michael@0: /**
michael@0:  *
michael@0:  * Some helpers for common operations in the App Manager:
michael@0:  *
michael@0:  *  . mergeStores: merge several store into one.
michael@0:  *  . l10n: resolves strings from app-manager.properties.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: let Utils = (function() {
michael@0:   const Cu = Components.utils;
michael@0:   const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
michael@0:   const {devtools} = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
michael@0:   const {require} = devtools;
michael@0:   const EventEmitter = require("devtools/toolkit/event-emitter");
michael@0: 
michael@0: 
michael@0:   function _createSetEventForwarder(key, finalStore) {
michael@0:     return function(event, path, value) {
michael@0:       finalStore.emit("set", [key].concat(path), value);
michael@0:     };
michael@0:   }
michael@0: 
michael@0:   function mergeStores(stores) {
michael@0:     let finalStore = {object:{}};
michael@0: 
michael@0:     EventEmitter.decorate(finalStore);
michael@0: 
michael@0:     let setEventForwarders = {};
michael@0: 
michael@0:     for (let key in stores) {
michael@0:       let store = stores[key];
michael@0:       finalStore.object[key] = store.object;
michael@0:       setEventForwarders[key] = _createSetEventForwarder(key, finalStore);
michael@0:       store.on("set", setEventForwarders[key]);
michael@0:     }
michael@0: 
michael@0:     finalStore.destroy = () => {
michael@0:       for (let key in stores) {
michael@0:         let store = stores[key];
michael@0:         store.off("set", setEventForwarders[key]);
michael@0:         if (store.destroy) {
michael@0:           store.destroy();
michael@0:         }
michael@0:       }
michael@0:     };
michael@0: 
michael@0:     return finalStore;
michael@0:   }
michael@0: 
michael@0: 
michael@0:   let strings = Services.strings.createBundle("chrome://browser/locale/devtools/app-manager.properties");
michael@0: 
michael@0:   function l10n (property, args = []) {
michael@0:     if (args && args.length > 0) {
michael@0:       return strings.formatStringFromName(property, args, args.length);
michael@0:     } else {
michael@0:       return strings.GetStringFromName(property);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return {
michael@0:     mergeStores: mergeStores,
michael@0:     l10n: l10n
michael@0:   }
michael@0: })();