From ba42313c5fed7ddb73acaa92377757a63426b8a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Standa=20Luke=C5=A1?= <exyi@outlook.cz>
Date: Mon, 12 Aug 2024 16:58:36 +0200
Subject: [PATCH] Fix near page indexes crashing on invalid page number

... which can very plausibly occur when rows get removed

fixes  #1835
---
 src/Framework/Core/Controls/Options/PagingOptions.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Framework/Core/Controls/Options/PagingOptions.cs b/src/Framework/Core/Controls/Options/PagingOptions.cs
index 9a626f53fe..83e009520e 100644
--- a/src/Framework/Core/Controls/Options/PagingOptions.cs
+++ b/src/Framework/Core/Controls/Options/PagingOptions.cs
@@ -107,8 +107,10 @@ public virtual IList<int> GetNearPageIndexes()
         /// </summary>
         protected virtual IList<int> GetDefaultNearPageIndexes(int distance)
         {
-            var firstIndex = Math.Max(PageIndex - distance, 0);
-            var lastIndex = Math.Min(PageIndex + distance + 1, PagesCount);
+            var count = this.PagesCount;
+            var index = Math.Max(0, Math.Min(count - 1, PageIndex)); // clamp index to be a valid page
+            var firstIndex = Math.Max(index - distance, 0);
+            var lastIndex = Math.Min(index + distance + 1, count);
             return Enumerable
                 .Range(firstIndex, lastIndex - firstIndex)
                 .ToList();