update: use Localization

src/addon.ts

@@ -11,7 +11,6 @@ class Addon {
     ztoolkit: ZoteroToolkit;
     locale?: {
       current: any;
-      default: any;
     };
     prefs?: {
       window: Window;

src/utils/locale.ts

@@ -4,18 +4,12 @@ import { config } from "../../package.json";
  * Initialize locale data
  */
 export function initLocale() {
-  const l10n = ztoolkit.getGlobal("L10nRegistry").getInstance();
-  const bundleGenerator = l10n.generateBundlesSync(
-    [Zotero.locale, "en-US"],
-    [`${config.addonRef}-addon.ftl`]
+  const l10n = new (ztoolkit.getGlobal("Localization"))(
+    [`${config.addonRef}-addon.ftl`],
+    true
   );
-  const currentBundle = bundleGenerator.next().value;
-  // No default when in en-US
-  const defaultBundle =
-    Zotero.locale !== "en-US" ? bundleGenerator.next().value : null;
   addon.data.locale = {
-    current: currentBundle,
-    default: defaultBundle,
+    current: l10n,
   };
 }
 
@@ -35,24 +29,15 @@ export function initLocale() {
  * ```
  */
 export function getString(localString: string, branch = ""): string {
-  return (
-    getStringFromBundle(addon.data.locale?.current, localString, branch) ||
-    getStringFromBundle(addon.data.locale?.default, localString, branch) ||
-    localString
-  );
-}
-
-function getStringFromBundle(bundle: any, localString: string, branch = "") {
-  if (!bundle) {
-    return "";
+  const pattern = addon.data.locale?.current.formatMessagesSync([
+    { id: localString },
+  ])[0];
+  if (!pattern) {
+    return localString;
   }
-  const patterns = bundle.getMessage(localString);
-  if (!patterns) {
-    return "";
-  }
-  if (branch) {
-    return bundle.formatPattern(patterns.attributes[branch]);
+  if (branch && pattern.attributes) {
+    return pattern.attributes[branch] || localString;
   } else {
-    return bundle.formatPattern(patterns.value);
+    return pattern.value || localString;
   }
 }