From 534de78d378a75846abd1e14346dea7b011e6505 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 5 Dec 2023 09:43:53 -0800
Subject: [PATCH] core: alternate scroll encoding should respect DECCKM

---
 src/Surface.zig | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Surface.zig b/src/Surface.zig
index f2d903a27..50de3b1c2 100644
--- a/src/Surface.zig
+++ b/src/Surface.zig
@@ -1474,7 +1474,13 @@ pub fn scrollCallback(
                 // clear the selection.
                 self.setSelection(null);
 
-                const seq = if (y.delta < 0) "\x1bOA" else "\x1bOB";
+                const seq = if (self.io.terminal.modes.get(.cursor_keys)) seq: {
+                    // cursor key: application mode
+                    break :seq if (y.delta < 0) "\x1bOA" else "\x1bOB";
+                } else seq: {
+                    // cursor key: normal mode
+                    break :seq if (y.delta < 0) "\x1b[A" else "\x1b[B";
+                };
                 for (0..y.delta_unsigned) |_| {
                     _ = self.io_thread.mailbox.push(.{
                         .write_stable = seq,