From 8fa9b5778e18a095651d43287d477672c1b79367 Mon Sep 17 00:00:00 2001
From: shouya <526598+shouya@users.noreply.github.com>
Date: Fri, 23 May 2025 11:06:49 +0900
Subject: [PATCH] preserve tfam group key when it exists

---
 src/calibre/gui2/viewer/highlights.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/gui2/viewer/highlights.py b/src/calibre/gui2/viewer/highlights.py
index 1fc50d9d8e..dea1794b51 100644
--- a/src/calibre/gui2/viewer/highlights.py
+++ b/src/calibre/gui2/viewer/highlights.py
@@ -340,7 +340,7 @@ class Highlights(QTreeWidget):
             if tfam:
                 tsec = tfam[0]
                 lsec = tfam[-1]
-                key = (spine_index, tsec or '', lsec or '')
+                key = (spine_index,) + tfam
             else:
                 tsec = h.get('top_level_section_title')
                 lsec = h.get('lowest_level_section_title')