From e7c38ab37f967d16e2eacdb0bbde2d933a332057 Mon Sep 17 00:00:00 2001
From: akbash <akbash@herdr.dev>
Date: Sun, 9 Aug 2026 14:50:11 +0300
Subject: perf(ui): avoid full pane mode reads for scrollbars (#2554)

---
 src/pane/terminal.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/pane')

diff --git a/src/pane/terminal.rs b/src/pane/terminal.rs
index a6e5c1da..1c10726c 100644
--- a/src/pane/terminal.rs
+++ b/src/pane/terminal.rs
@@ -388,6 +388,10 @@ impl PaneTerminal {
         self.ghostty.input_state()
     }
 
+    pub fn alternate_screen_active(&self) -> bool {
+        self.ghostty.alternate_screen_active()
+    }
+
     pub fn wheel_routing(&self) -> Option<crate::pane::WheelRouting> {
         self.ghostty.wheel_routing()
     }
@@ -1665,6 +1669,12 @@ impl GhosttyPaneTerminal {
         core.kitty_keyboard.replay_ansi()
     }
 
+    pub fn alternate_screen_active(&self) -> bool {
+        self.core.lock().is_ok_and(|core| {
+            core.terminal.active_screen().ok() == Some(crate::ghostty::ActiveScreen::Alternate)
+        })
+    }
+
     pub fn input_state(&self) -> Option<InputState> {
         let Ok(core) = self.core.lock() else {
             return None;
-- 
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