Undo selection on hiding message

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

@@ -147,6 +147,12 @@ public interface DaoMessage {
             ", CASE WHEN folder.type = '" + EntityFolder.ARCHIVE + "' THEN 1 ELSE 0 END")
     DataSource.Factory<Integer, TupleMessageEx> pagedThread(long account, String thread, Long id, boolean debug);
 
+    @Query("SELECT message.id FROM folder" +
+            " JOIN message ON message.folder = folder.id" +
+            " WHERE CASE WHEN :folder IS NULL THEN folder.unified ELSE folder.id = :folder END" +
+            " AND ui_hide")
+    LiveData<List<Long>> liveHidden(Long folder);
+
     @Query("SELECT id FROM message" +
             " WHERE account = :account" +
             " AND thread = :thread" +

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

@@ -1754,6 +1754,14 @@ public class FragmentMessages extends FragmentBase {
                         swipeRefresh.setRefreshing(refreshing);
                     }
                 });
+                db.message().liveHidden(null).observe(getViewLifecycleOwner(), new Observer<List<Long>>() {
+                    @Override
+                    public void onChanged(List<Long> ids) {
+                        if (ids != null && selectionTracker != null)
+                            for (long id : ids)
+                                selectionTracker.deselect(id);
+                    }
+                });
                 break;
 
             case FOLDER:
@@ -1793,6 +1801,14 @@ public class FragmentMessages extends FragmentBase {
                         swipeRefresh.setRefreshing(refreshing);
                     }
                 });
+                db.message().liveHidden(folder).observe(getViewLifecycleOwner(), new Observer<List<Long>>() {
+                    @Override
+                    public void onChanged(List<Long> ids) {
+                        if (ids != null && selectionTracker != null)
+                            for (long id : ids)
+                                selectionTracker.deselect(id);
+                    }
+                });
                 break;
 
             case THREAD: