Scroll to top after recreate

app/src/main/java/eu/faircode/email/Core.java

@@ -124,6 +124,8 @@ import static androidx.core.app.NotificationCompat.DEFAULT_SOUND;
 import static javax.mail.Folder.READ_WRITE;
 
 class Core {
+    static final Map<Long, EntityFolder> newMessages = new HashMap<>();
+
     private static final int MAX_NOTIFICATION_COUNT = 25; // per group
     private static final long AFTER_SEND_DELAY = 15 * 1000L; // milliseconds
     private static final int SYNC_CHUNCK_SIZE = 200;
@@ -2301,6 +2303,10 @@ class Core {
 
                 // Prepare scroll to top
                 if (!message.ui_seen && message.received > account.created) {
+                    synchronized (newMessages) {
+                        newMessages.put(folder.id, folder);
+                    }
+
                     Intent report = new Intent(FragmentMessages.ACTION_NEW_MESSAGE);
                     report.putExtra("folder", folder.id);
                     report.putExtra("unified", folder.unified);

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -3751,6 +3751,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                 if (handleThreadActions(messages))
                     return;
 
+            checkNewMessages();
+
             Log.i("Submit messages=" + messages.size());
             adapter.submitList(messages);
 
@@ -4476,6 +4478,10 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         long fid = intent.getLongExtra("folder", -1);
         boolean unified = intent.getBooleanExtra("unified", false);
 
+        synchronized (Core.newMessages) {
+            Core.newMessages.remove(fid);
+        }
+
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
         boolean autoscroll = prefs.getBoolean("autoscroll", true);
 
@@ -4485,6 +4491,27 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             adapter.gotoTop();
     }
 
+    private void checkNewMessages() {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+        boolean autoscroll = prefs.getBoolean("autoscroll", true);
+
+        boolean newMessages = false;
+        synchronized (Core.newMessages) {
+            for (long fid : new ArrayList<>(Core.newMessages.keySet())) {
+                EntityFolder f = Core.newMessages.get(fid);
+                if (f != null &&
+                        ((viewType == AdapterMessage.ViewType.UNIFIED && f.unified) ||
+                                (viewType == AdapterMessage.ViewType.FOLDER && folder == f.id))) {
+                    newMessages = true;
+                    Core.newMessages.remove(fid);
+                }
+            }
+        }
+
+        if (autoscroll && newMessages)
+            adapter.gotoTop();
+    }
+
     private void onStoreRaw(Intent intent) {
         message = intent.getLongExtra("id", -1);
         Intent create = new Intent(Intent.ACTION_CREATE_DOCUMENT);