Limit number of messages in widget

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

@@ -607,8 +607,9 @@ public interface DaoMessage {
             " AND (NOT :flagged OR message.ui_flagged)" +
             " GROUP BY account.id" +
             ", CASE WHEN message.thread IS NULL OR NOT :threading THEN message.id ELSE message.thread END" +
-            " ORDER BY message.received DESC")
-    List<TupleMessageWidget> getWidgetUnified(Long account, Long folder, boolean threading, boolean unseen, boolean flagged);
+            " ORDER BY message.received DESC" +
+            " LIMIT :limit")
+    List<TupleMessageWidget> getWidgetUnified(Long account, Long folder, boolean threading, boolean unseen, boolean flagged, int limit);
 
     @Query("SELECT uid FROM message" +
             " WHERE folder = :folder" +

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

@@ -77,6 +77,8 @@ public class WidgetUnifiedRemoteViewsFactory implements RemoteViewsService.Remot
     private boolean allColors;
     private List<TupleMessageWidget> messages = new ArrayList<>();
 
+    private static final int MAX_WIDGET_MESSAGES = 500;
+
     WidgetUnifiedRemoteViewsFactory(final Context context, Intent intent) {
         this.context = context;
         this.appWidgetId = intent.getIntExtra(
@@ -143,7 +145,8 @@ public class WidgetUnifiedRemoteViewsFactory implements RemoteViewsService.Remot
             messages = db.message().getWidgetUnified(
                     account < 0 ? null : account,
                     folder < 0 ? null : folder,
-                    threading, unseen, flagged);
+                    threading, unseen, flagged,
+                    MAX_WIDGET_MESSAGES);
 
             db.setTransactionSuccessful();
         } finally {