From befbd670945df2788dea64d5d2000349a4674e56 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Fri, 20 Nov 2020 10:51:25 +0100
Subject: [PATCH] Fake key release events for some Japanese keys

Windows either completely omits WM_KEYUP for these, or only sends it
just before the next WM_KEYDOWN for the key.
---
 vncviewer/Viewport.cxx | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/vncviewer/Viewport.cxx b/vncviewer/Viewport.cxx
index 84777be1..b5466acb 100644
--- a/vncviewer/Viewport.cxx
+++ b/vncviewer/Viewport.cxx
@@ -1060,6 +1060,16 @@ int Viewport::handleSystemEvent(void *event, void *data)
 
     self->handleKeyPress(keyCode, keySym);
 
+    // We don't get reliable WM_KEYUP for these
+    switch (keySym) {
+    case XK_Zenkaku_Hankaku:
+    case XK_Eisu_toggle:
+    case XK_Katakana:
+    case XK_Hiragana:
+    case XK_Romaji:
+      self->handleKeyRelease(keyCode);
+    }
+
     return 1;
   } else if ((msg->message == WM_KEYUP) || (msg->message == WM_SYSKEYUP)) {
     UINT vKey;
-- 
2.39.5