From fe084bf42e2002c0636b90c6bc326cc06b318158 Mon Sep 17 00:00:00 2001
From: Davide De Rosa <keeshux@gmail.com>
Date: Wed, 14 Apr 2021 16:11:10 +0200
Subject: [PATCH] Ensure prev/next row lies beyond visible

---
 .../macOS/Scenes/Preferences/DebugLogViewController.swift   | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Passepartout/App/macOS/Scenes/Preferences/DebugLogViewController.swift b/Passepartout/App/macOS/Scenes/Preferences/DebugLogViewController.swift
index e3cce924..bb9e327c 100644
--- a/Passepartout/App/macOS/Scenes/Preferences/DebugLogViewController.swift
+++ b/Passepartout/App/macOS/Scenes/Preferences/DebugLogViewController.swift
@@ -148,6 +148,9 @@ class DebugLogViewController: NSViewController {
         let visibleRow = firstVisibleRow()
         let viewport = logLines[0..<visibleRow]
         let row = viewport.lastIndex(of: Substring(GroupConstants.VPN.sessionMarker)) ?? 0
+        guard row < visibleRow else {
+            return
+        }
         tableTextLog.scrollRowToVisible(row)
     }
 
@@ -158,6 +161,9 @@ class DebugLogViewController: NSViewController {
         }
         let viewport = logLines[(visibleRow + 1)..<logLines.count]
         let row = viewport.firstIndex(of: Substring(GroupConstants.VPN.sessionMarker)) ?? (logLines.count - 1)
+        guard row > visibleRow else {
+            return
+        }
         tableTextLog.scrollRowToVisible(row)
     }