Issue 5835 - Add some notification related message handlers

messageResponder.js

Index: messageResponder.js
diff --git a/messageResponder.js b/messageResponder.js
index b8516d3b32f3d3a94fba8a4cfbc5b89a93090bdb..baf0d5897fea8e5634953f243fa5d9266529124e 100644
--- a/messageResponder.js
+++ b/messageResponder.js
@@ -28,6 +28,7 @@
   const {FilterNotifier} = require("filterNotifier");
   const {defaultMatcher} = require("matcher");
   const {Notification: NotificationStorage} = require("notification");
+  const {getActiveNotification, shouldDisplay} = require("notificationHelper");
 
   const {Filter, BlockingFilter, RegExpFilter} = require("filterClasses");
   const {Synchronizer} = require("synchronizer");
@@ -342,6 +343,24 @@
     return Prefs[message.key] = !Prefs[message.key];
   });
 
+  port.on(
+    "notifications.getActive",
+    (message, sender) => getActiveNotification()
+  );
+
+  port.on(
+    "notifications.shouldDisplay",
+    (message, sender) => shouldDisplay(message.method, message.notificationType)
+  );
+
+  port.on(
+    "notifications.getLocalizedTexts",
+    (message, sender) =>
+      NotificationStorage.getLocalizedTexts(
+        message.notification, message.locale
+      )
+  );
+
   port.on("subscriptions.add", (message, sender) =>
   {
     let subscription = Subscription.fromURL(message.url);