From 4a074eb2bf7a27d4787c2b3f49148ab4a99fe382 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 9 Oct 2019 11:34:34 +0530
Subject: [PATCH] Viewer: Fix preferences under Scrolling behavior not being
 saved correctly

---
 src/pyj/read_book/prefs/scrolling.pyj | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/pyj/read_book/prefs/scrolling.pyj b/src/pyj/read_book/prefs/scrolling.pyj
index d136832916..96eebe56e6 100644
--- a/src/pyj/read_book/prefs/scrolling.pyj
+++ b/src/pyj/read_book/prefs/scrolling.pyj
@@ -54,8 +54,12 @@ develop = create_scrolling_panel
 def commit_scrolling(onchange):
     sd = get_session_data()
     container = get_container()
+    changed = False
     for control in container.querySelectorAll('input[name]'):
         name = control.getAttribute('name')
         val = control.checked
-        sd.set(name, None if val is defaults[name] else val)
-    onchange()
+        if val is not sd.get(name):
+            sd.set(name, val)
+            changed = True
+    if changed:
+        onchange()