From 80c0c07250d22f69d3fa05cb1700302d66180eb8 Mon Sep 17 00:00:00 2001
From: Can Celik <ogulcancelik@gmail.com>
Date: Mon, 28 Sep 2026 16:19:42 +0300
Subject: perf: send scrolling pane output as row shifts and skip blank cells
 (#4711)

* perf: send scrolling pane output as row shifts and skip blank cells

* fix: keep expanded scroll patches disjoint for the fast presentation path
---
 src/server/client_transport.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/server/client_transport.rs')

diff --git a/src/server/client_transport.rs b/src/server/client_transport.rs
index 465408f5..88daf250 100644
--- a/src/server/client_transport.rs
+++ b/src/server/client_transport.rs
@@ -418,6 +418,7 @@ pub(crate) enum ServerEvent {
         surface_active: bool,
         surface_reuse: bool,
         surface_delta: bool,
+        surface_scroll: bool,
         writer: ClientWriter,
     },
     /// A client sent an input message.
@@ -785,6 +786,7 @@ pub(crate) fn handle_client_handshake(
                     hello.surface_active,
                     hello.surface_reuse,
                     hello.surface_delta,
+                    hello.surface_scroll,
                 )),
             )
         }
@@ -881,6 +883,7 @@ pub(crate) fn handle_client_handshake(
         surface_active,
         surface_reuse,
         surface_delta,
+        surface_scroll,
     )) = shell_options
     {
         ServerEvent::ClientShellConnected {
@@ -896,6 +899,7 @@ pub(crate) fn handle_client_handshake(
             surface_active,
             surface_reuse,
             surface_delta,
+            surface_scroll,
             writer,
         }
     } else {
@@ -1472,6 +1476,7 @@ mod tests {
             surface_active: true,
             surface_reuse: false,
             surface_delta: false,
+            surface_scroll: false,
             snapshot_codecs: vec![crate::protocol::endpoint::SNAPSHOT_CODEC_V1.into()],
             surface_codecs: vec![crate::protocol::endpoint::SURFACE_CODEC_V1.into()],
             input_codecs: vec![crate::protocol::endpoint::INPUT_CODEC_V1.into()],
@@ -1989,10 +1994,12 @@ mod tests {
                 surface_active,
                 surface_reuse,
                 surface_delta,
+                surface_scroll,
                 writer,
             } => {
                 assert!(!surface_reuse);
                 assert!(!surface_delta);
+                assert!(!surface_scroll);
                 assert_eq!(client_id, 43);
                 assert_eq!((surface_cols, surface_rows), (80, 29));
                 assert_eq!((cell_width_px, cell_height_px), (8, 16));
-- 
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