From 3194e0556fd1a4c86e12beace738c9a42263e80b Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Mon, 26 May 2025 06:40:22 +0900
Subject: [PATCH] [MSCTF] Implement CheckAnchorStore function (#8025)

Implementing missing features...
JIRA issue: CORE-19361
---
 dll/win32/msctf/utils.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/dll/win32/msctf/utils.cpp b/dll/win32/msctf/utils.cpp
index 394c21b316e..ccecab6f07d 100644
--- a/dll/win32/msctf/utils.cpp
+++ b/dll/win32/msctf/utils.cpp
@@ -49,6 +49,7 @@ BOOL gfSharedMemory = FALSE;
 LONG g_cRefDll = -1;
 BOOL g_fCUAS = FALSE;
 TCHAR g_szCUASImeFile[16] = { 0 };
+BOOL g_fNoITextStoreAnchor = TRUE;
 
 // Messages
 UINT g_msgPrivate = 0;
@@ -481,11 +482,22 @@ BOOL InitLangChangeHotKey(VOID)
 }
 
 /**
- * @unimplemented
+ * @implemented
  */
 VOID CheckAnchorStores(VOID)
 {
-    //FIXME
+    HKEY hKey;
+    LSTATUS error;
+    error = RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT("SOFTWARE\\Microsoft\\CTF"), 0, KEY_READ, &hKey);
+    if (error != ERROR_SUCCESS)
+        return;
+
+    DWORD dwData = 0, cbData = sizeof(dwData);
+    error = RegQueryValueEx(hKey, TEXT("EnableAnchorContext"), NULL, NULL, (PBYTE)&dwData, &cbData);
+    if (error == ERROR_SUCCESS && cbData == sizeof(DWORD) && dwData == 1)
+        g_fNoITextStoreAnchor = FALSE;
+
+    RegCloseKey(hKey);
 }
 
 VOID InitCUASFlag(VOID)