From 4175e0dc32ec4f6f7bacf3cdec66027b1b3a82ae Mon Sep 17 00:00:00 2001
From: Liang Qi <cavendish.qi@gmail.com>
Date: Thu, 6 Feb 2025 18:08:46 +0100
Subject: [PATCH] PreeditHandler: update preedit string when it's empty (#1174)

See also https://bugreports.qt.io/browse/QTBUG-127995 , Deleted
character appears again when switching languages (Mozc / IBus)

PiperOrigin-RevId: 723804210
---
 src/unix/ibus/preedit_handler.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/unix/ibus/preedit_handler.cc b/src/unix/ibus/preedit_handler.cc
index 38f22f264..e424ddd6b 100644
--- a/src/unix/ibus/preedit_handler.cc
+++ b/src/unix/ibus/preedit_handler.cc
@@ -109,6 +109,8 @@ int CursorPos(const commands::Output &output) {
 bool PreeditHandler::Update(IbusEngineWrapper *engine,
                             const commands::Output &output) {
   if (!output.has_preedit()) {
+    IbusTextWrapper empty_text("");
+    engine->UpdatePreeditTextWithMode(&empty_text, 0);
     engine->HidePreeditText();
     return true;
   }