From abd08c5e1264b1e8b6beb3347fae159be0a2f53c Mon Sep 17 00:00:00 2001
From: ryancheung <ryancheung.go@gmail.com>
Date: Mon, 24 Aug 2020 15:37:14 +0800
Subject: [PATCH] Fix restoring ImmOpenStatus completely

---
 ImeSharp/Imm32Manager.cs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/ImeSharp/Imm32Manager.cs b/ImeSharp/Imm32Manager.cs
index 6a0a3de..8b30758 100644
--- a/ImeSharp/Imm32Manager.cs
+++ b/ImeSharp/Imm32Manager.cs
@@ -73,6 +73,8 @@ private IntPtr DefaultImc
         private static ImmCompositionStringHandler _compositionStringHandler;
         private static ImmCompositionIntHandler _compositionCursorHandler;
 
+        private bool _lastImmOpenStatus;
+
         public Imm32Manager(IntPtr windowHandle)
         {
             _windowHandle = windowHandle;
@@ -197,7 +199,7 @@ internal bool ProcessMessage(IntPtr hWnd, uint msg, ref IntPtr wParam, ref IntPt
                         // Must re-associate ime context or things won't work.
                         NativeMethods.ImmAssociateContext(_windowHandle, DefaultImc);
 
-                        if (!NativeMethods.ImmGetOpenStatus(DefaultImc))
+                        if (_lastImmOpenStatus)
                             NativeMethods.ImmSetOpenStatus(DefaultImc, true);
 
                         var lParam64 = lParam.ToInt64();
@@ -207,8 +209,9 @@ internal bool ProcessMessage(IntPtr hWnd, uint msg, ref IntPtr wParam, ref IntPt
                             lParam64 &= ~NativeMethods.ISC_SHOWUICOMPOSITIONWINDOW;
                         lParam = (IntPtr)(int)lParam64;
                     }
-                    else
-                        NativeMethods.ImmSetOpenStatus(DefaultImc, false);
+                    break;
+                case NativeMethods.WM_KILLFOCUS:
+                    _lastImmOpenStatus = NativeMethods.ImmGetOpenStatus(DefaultImc);
                     break;
                 case NativeMethods.WM_IME_NOTIFY:
                     IMENotify(wParam.ToInt32());