From e59bdb8d52a9b1d493f5c70d7bcf2c862811e9d3 Mon Sep 17 00:00:00 2001
From: neneee0181 <2022180024@tukorea.ac.kr>
Date: Thu, 28 May 2026 22:01:28 +0900
Subject: [PATCH] Fix Korean IME space handling

---
 frontend/app/view/term/term-model.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/frontend/app/view/term/term-model.ts b/frontend/app/view/term/term-model.ts
index a256929e7d..3b7a5dc8b7 100644
--- a/frontend/app/view/term/term-model.ts
+++ b/frontend/app/view/term/term-model.ts
@@ -697,6 +697,10 @@ export class TermViewModel implements ViewModel {
     }
 
     handleTerminalKeydown(event: KeyboardEvent): boolean {
+        if (this.shouldDeferImeSpaceToComposition(event)) {
+            return false;
+        }
+
         const waveEvent = keyutil.adaptFromReactOrNativeKeyEvent(event);
         if (waveEvent.type != "keydown") {
             return true;
@@ -779,6 +783,14 @@ export class TermViewModel implements ViewModel {
         return true;
     }
 
+    shouldDeferImeSpaceToComposition(event: KeyboardEvent): boolean {
+        // On Windows Korean IME, xterm's keydown path can finalize composition before
+        // Chromium commits the last syllable, causing space to be sent before it.
+        return (
+            isWindows() && event.isComposing && event.key === " " && !event.ctrlKey && !event.altKey && !event.metaKey
+        );
+    }
+
     setTerminalTheme(themeName: string) {
         RpcApi.SetMetaCommand(TabRpcClient, {
             oref: WOS.makeORef("block", this.blockId),