fix: let defaultLocale works (#639)

Author: kiwiwong

src/i18n/localeService.ts

@@ -84,6 +84,7 @@ export interface ILocaleService {
 }
 
 export const STORE_KEY = `${APP_PREFIX}.localeId`;
+export const DEFAULT_LOCALE_ID = `${APP_PREFIX}.defaultLocaleId`;
 
 @singleton()
 export class LocaleService extends Component implements ILocaleService {

src/provider/molecule.tsx

@@ -3,14 +3,14 @@ import { container } from 'tsyringe';
 import React, { createContext, Component } from 'react';
 
 import { defaultExtensions } from 'mo/extensions';
-import { BuiltInDefault } from 'mo/extensions/locales-defaults';
+import { BuiltInId } from 'mo/extensions/locales-defaults';
 import { IExtension } from 'mo/model/extension';
 import {
     ExtensionService,
     IExtensionService,
 } from 'mo/services/extensionService';
 import { LocaleService, ILocaleService } from 'mo/i18n';
-import { STORE_KEY } from 'mo/i18n/localeService';
+import { STORE_KEY, DEFAULT_LOCALE_ID } from 'mo/i18n/localeService';
 import { IMonacoService, MonacoService } from 'mo/monaco/monacoService';
 import { ILayoutService, LayoutService } from 'mo/services';
 import * as controllers from 'mo/controller';
@@ -81,14 +81,22 @@ export class MoleculeProvider extends Component<IMoleculeProps> {
     }
 
     initLocaleExts(languages: IExtension[]) {
-        const { defaultLocale = BuiltInDefault } = this.props;
+        const { defaultLocale = BuiltInId } = this.props;
 
         this.extensionService.load(languages);
 
         // And Molecule should set the correct locale before loading normal extensions in case of
         // the localize method returns incorrect international text caused by incorrect current locale in the normal extensions
         const currentLocale = localStorage.getItem(STORE_KEY) || defaultLocale;
-        this.localeService.setCurrentLocale(currentLocale);
+        const preDefaultLocale = localStorage.getItem(DEFAULT_LOCALE_ID);
+        let finalLocale = currentLocale;
+
+        if (defaultLocale !== preDefaultLocale) {
+            finalLocale = defaultLocale;
+        }
+
+        this.localeService.setCurrentLocale(finalLocale);
+        localStorage.setItem(DEFAULT_LOCALE_ID, defaultLocale);
     }
 
     /**