1 files changed, 34 insertions, 0 deletions
diff --git a/toolkit/components/extensions/ext-i18n.js b/toolkit/components/extensions/ext-i18n.js
new file mode 100644
index 000000000..bb4bde4bd
--- /dev/null
+++ b/toolkit/components/extensions/ext-i18n.js
@@ -0,0 +1,34 @@
+"use strict";
+
+var {classes: Cc, interfaces: Ci, utils: Cu} = Components;
+
+Cu.import("resource://gre/modules/ExtensionUtils.jsm");
+var {
+  detectLanguage,
+} = ExtensionUtils;
+
+function i18nApiFactory(context) {
+  let {extension} = context;
+  return {
+    i18n: {
+      getMessage: function(messageName, substitutions) {
+        return extension.localizeMessage(messageName, substitutions, {cloneScope: context.cloneScope});
+      },
+
+      getAcceptLanguages: function() {
+        let result = extension.localeData.acceptLanguages;
+        return Promise.resolve(result);
+      },
+
+      getUILanguage: function() {
+        return extension.localeData.uiLocale;
+      },
+
+      detectLanguage: function(text) {
+        return detectLanguage(text);
+      },
+    },
+  };
+}
+extensions.registerSchemaAPI("i18n", "addon_child", i18nApiFactory);
+extensions.registerSchemaAPI("i18n", "content_child", i18nApiFactory);