+ inline ChatLine *chatLine(int row) const { return (row < _lines.count()) ? _lines.value(row) : 0; }
+ inline ChatLine *chatLine(const QModelIndex &index) const { return _lines.value(index.row()); }
+
+ //! Find the ChatLine belonging to a MsgId
+ /** Searches for the ChatLine belonging to a MsgId.
+ * Note that this method performs a binary search, hence it has as complexity of O(log n).
+ * If matchExact is false, and we don't have an exact match for the given msgId, we return the visible line right
+ * above the requested one.
+ * \param msgId The message ID to look for
+ * \param matchExact Whether we find only exact matches
+ * \return The ChatLine corresponding to the given MsgId
+ */
+ ChatLine *chatLine(MsgId msgId, bool matchExact = true) const;
+
+ inline ChatLine *lastLine() const { return _lines.count() ? _lines.last() : 0; }