From fc85f4812f8cb38c772f2b5b5c43411101b5b380 Mon Sep 17 00:00:00 2001
From: Jeremy Rose <172423086+nornagon-openai@users.noreply.github.com>
Date: Tue, 29 Jul 2025 09:40:26 -0700
Subject: [PATCH] feat: map ^U to kill-line-to-head (#1711)

see
[discussion](https://github.com/rhysd/tui-textarea/issues/51#issuecomment-3021191712),
it's surprising that ^U behaves this way. IMO the undo/redo
functionality in tui-textarea isn't good enough to be worth preserving,
but if we do bring it back it should probably be on C-z / C-S-z / C-y.
---
 codex-rs/tui/src/bottom_pane/chat_composer.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/codex-rs/tui/src/bottom_pane/chat_composer.rs b/codex-rs/tui/src/bottom_pane/chat_composer.rs
index 6a1bb526..b15d81f8 100644
--- a/codex-rs/tui/src/bottom_pane/chat_composer.rs
+++ b/codex-rs/tui/src/bottom_pane/chat_composer.rs
@@ -477,6 +477,17 @@ impl ChatComposer<'_> {
             }
         }
 
+        if let Input {
+            key: Key::Char('u'),
+            ctrl: true,
+            alt: false,
+            ..
+        } = input
+        {
+            self.textarea.delete_line_by_head();
+            return (InputResult::None, true);
+        }
+
         // Normal input handling
         self.textarea.input(input);
         let text_after = self.textarea.lines().join("\n");