From 3928f5afe7db93b3e7b513b71ccc7bd14a071590 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Sun, 3 Aug 2025 17:05:31 +0800
Subject: [PATCH] Improve smooth scroll. Close #462

---
 lib/components/scroll.dart | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/components/scroll.dart b/lib/components/scroll.dart
index 741de7d..7510c96 100644
--- a/lib/components/scroll.dart
+++ b/lib/components/scroll.dart
@@ -117,16 +117,25 @@ class _SmoothScrollProviderState extends State<SmoothScrollProvider> {
           _futurePosition ??= currentLocation;
           double k = (_futurePosition! - currentLocation).abs() / 1600 + 1;
           _futurePosition = _futurePosition! + pointerSignal.scrollDelta.dy * k;
+          var beforeOffset = (_futurePosition! - currentLocation).abs();
           _futurePosition = _futurePosition!.clamp(
             _controller.position.minScrollExtent,
             _controller.position.maxScrollExtent,
           );
+          var afterOffset = (_futurePosition! - currentLocation).abs();
           if (_futurePosition == old) return;
           var target = _futurePosition!;
+          var duration = _fastAnimationDuration;
+          if (afterOffset < beforeOffset) {
+            duration = duration * (afterOffset / beforeOffset);
+            if (duration < Duration(milliseconds: 10)) {
+              duration = Duration(milliseconds: 10);
+            }
+          }
           _controller
               .animateTo(
             _futurePosition!,
-            duration: _fastAnimationDuration,
+            duration: duration,
             curve: Curves.linear,
           )
               .then((_) {