Load replied-to message when it isn't in the timeline already

src/messageeventmodel.h

@@ -33,7 +33,9 @@ public:
         MimeTypeRole,
         FileMimetypeIcon,
 
+        IsReplyRole,
         ReplyRole,
+        ReplyIdRole,
 
         ShowAuthorRole,
         ShowSectionRole,
@@ -64,6 +66,7 @@ public:
     Q_INVOKABLE [[nodiscard]] int eventIDToIndex(const QString &eventID) const;
     Q_INVOKABLE [[nodiscard]] QVariant getLastLocalUserMessageEventId();
     Q_INVOKABLE [[nodiscard]] QVariant getLatestMessageFromIndex(const int baseline);
+    Q_INVOKABLE void loadReply(const QModelIndex &row);
 
 private Q_SLOTS:
     int refreshEvent(const QString &eventId);
@@ -88,6 +91,8 @@ private:
     int refreshEventRoles(const QString &eventId, const QVector<int> &roles = {});
     void moveReadMarker(const QString &toEventId);
 
+    std::vector<event_ptr_tt<RoomEvent>> m_extraEvents;
+
 Q_SIGNALS:
     void roomChanged();
     void fancyEffectsReasonFound(const QString &fancyEffect);