From 9363d4edbfee769991a165071a9b1040889f359c Mon Sep 17 00:00:00 2001
From: dab246 <tdvu@linagora.com>
Date: Thu, 3 Apr 2025 22:03:38 +0700
Subject: [PATCH] TF-3507 Improve `PullToRefreshWidget` to increase performance

Signed-off-by: dab246 <tdvu@linagora.com>
---
 .../pull_to_refresh/pull_to_refresh_widget.dart   | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/core/lib/presentation/views/pull_to_refresh/pull_to_refresh_widget.dart b/core/lib/presentation/views/pull_to_refresh/pull_to_refresh_widget.dart
index 1cf7fe032..b3125e2f0 100644
--- a/core/lib/presentation/views/pull_to_refresh/pull_to_refresh_widget.dart
+++ b/core/lib/presentation/views/pull_to_refresh/pull_to_refresh_widget.dart
@@ -53,9 +53,18 @@ class _PullToRefreshWidgetState extends State<PullToRefreshWidget> {
     return NotificationListener<ScrollNotification>(
       onNotification: (notification) {
         if (notification is ScrollUpdateNotification) {
-          setState(() {
-            _scrollOffset = notification.metrics.pixels;
-          });
+          final newOffset = notification.metrics.pixels;
+          final crossedThreshold =
+              (_scrollOffset.abs() <= widget.deepRefreshThreshold &&
+                      newOffset.abs() > widget.deepRefreshThreshold) ||
+                  (_scrollOffset.abs() > widget.deepRefreshThreshold &&
+                      newOffset.abs() <= widget.deepRefreshThreshold);
+
+          if (crossedThreshold || _scrollOffset != newOffset) {
+            setState(() {
+              _scrollOffset = newOffset;
+            });
+          }
         }
         return false;
       },