From 23d2555543acfbffac897e0afca85aff0ea66044 Mon Sep 17 00:00:00 2001
From: Aram Drevekenin <aram@poor.dev>
Date: Fri, 8 Nov 2024 20:28:32 +0100
Subject: [PATCH] fix(output-buffer): truncate grid height when not rendering
 it fully (#3750)

* fix(output-buffer): truncate grid height when not rendering it fully

* also fix for cases where the changed lines are not contiguous
---
 zellij-server/src/output/mod.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/zellij-server/src/output/mod.rs b/zellij-server/src/output/mod.rs
index 7ad7a38b..ccb5f665 100644
--- a/zellij-server/src/output/mod.rs
+++ b/zellij-server/src/output/mod.rs
@@ -941,7 +941,12 @@ impl OutputBuffer {
             }
             changed_chunks
         } else {
-            let mut line_changes: Vec<_> = self.changed_lines.iter().copied().collect();
+            let mut line_changes: Vec<_> = self
+                .changed_lines
+                .iter()
+                .filter(|i| *i < &viewport_height)
+                .copied()
+                .collect();
             line_changes.sort_unstable();
             let mut changed_chunks = Vec::new();
             for line_index in line_changes {