[IMM32][SDK] Add CtfAImmIsIME, CtfImmSetAppCompatFlags etc. (#5862)

- Add CtfAImmIsIME, CtfImmIsCiceroStartedInThread and CtfImmSetAppCompatFlags functions.
- Implement CtfImmDispatchDefImeMessage function.
- Modify imm32.spec.
- Add the prototypes of ImmGetAppCompatFlags, CtfAImmIsIME, CtfImmIsCiceroStartedInThread,
  CtfImmSetAppCompatFlags, and CtfImmDispatchDefImeMessage into <imm32_undoc.h>.
CORE-19268

dll/win32/imm32/ctf.c

@@ -29,6 +29,9 @@ WINE_DEFAULT_DEBUG_CHANNEL(imm);
  * this folder.
  */
 
+/* "Active IMM" compatibility flags */
+DWORD g_aimm_compat_flags = 0;
+
 /* The instance of the CTF IME file */
 HINSTANCE g_hCtfIme = NULL;
 
@@ -192,6 +195,45 @@ CtfImeDestroyThreadMgr(VOID)
     return CTF_IME_FN(CtfImeDestroyThreadMgr)();
 }
 
+/***********************************************************************
+ *		CtfAImmIsIME (IMM32.@)
+ *
+ * @return TRUE if CTF IME or IMM IME is enabled.
+ */
+BOOL WINAPI
+CtfAImmIsIME(_In_ HKL hKL)
+{
+    TRACE("(%p)\n", hKL);
+    if (!Imm32LoadCtfIme())
+        return ImmIsIME(hKL);
+    return CTF_IME_FN(CtfImeIsIME)(hKL);
+}
+
+/***********************************************************************
+ *		CtfImmIsCiceroStartedInThread (IMM32.@)
+ *
+ * @return TRUE if Cicero is started in the current thread.
+ */
+BOOL WINAPI
+CtfImmIsCiceroStartedInThread(VOID)
+{
+    TRACE("()\n");
+    return !!(GetWin32ClientInfo()->CI_flags & 0x200);
+}
+
+/***********************************************************************
+ *		CtfImmSetAppCompatFlags (IMM32.@)
+ *
+ * Sets the application compatibility flags.
+ */
+VOID WINAPI
+CtfImmSetAppCompatFlags(_In_ DWORD dwFlags)
+{
+    TRACE("(0x%08X)\n", dwFlags);
+    if (!(dwFlags & 0xF0FFFFFF))
+        g_aimm_compat_flags = dwFlags;
+}
+
 /***********************************************************************
  * This function calls the same name function of the CTF IME side.
  */
@@ -361,6 +403,18 @@ CtfImmHideToolbarWnd(VOID)
     return 0;
 }
 
+BOOL Imm32InsideLoaderLock(VOID)
+{
+    return (NtCurrentTeb()->ProcessEnvironmentBlock->LoaderLock->OwningThread ==
+            NtCurrentTeb()->ClientId.UniqueThread);
+}
+
+/* FIXME: Use RTL */
+BOOL WINAPI RtlDllShutdownInProgress(VOID)
+{
+    return FALSE;
+}
+
 /***********************************************************************
  *		CtfImmDispatchDefImeMessage(IMM32.@)
  */
@@ -371,8 +425,12 @@ CtfImmDispatchDefImeMessage(
     _In_ WPARAM wParam,
     _In_ LPARAM lParam)
 {
-    /* FIXME("(%p, %u, %p, %p)\n", hWnd, uMsg, wParam, lParam); */
+    TRACE("(%p, %u, %p, %p)\n", hWnd, uMsg, wParam, lParam);
-    return 0;
+
+    if (RtlDllShutdownInProgress() || Imm32InsideLoaderLock() || !Imm32LoadCtfIme())
+        return 0;
+
+    return CTF_IME_FN(CtfImeDispatchDefImeMessage)(hWnd, uMsg, wParam, lParam);
 }
 
 /***********************************************************************

dll/win32/imm32/imm32.spec

@@ -1,6 +1,8 @@
 @ stdcall CtfAImmActivate(ptr)
 @ stdcall CtfAImmDeactivate(long)
+@ stdcall CtfAImmIsIME(ptr)
 @ stdcall CtfImmIsCiceroEnabled()
+@ stdcall CtfImmIsCiceroStartedInThread()
 @ stdcall CtfImmIsTextFrameServiceDisabled()
 @ stdcall CtfImmTIMActivate(ptr)
 @ stdcall CtfImmRestoreToolbarWnd(long)
@@ -8,6 +10,7 @@
 @ stdcall CtfImmDispatchDefImeMessage(ptr long ptr ptr)
 @ stdcall CtfImmIsGuidMapEnable(ptr)
 @ stdcall CtfImmGetGuidAtom(ptr long ptr)
+@ stdcall CtfImmSetAppCompatFlags(long)
 @ stdcall ImmActivateLayout(ptr)
 @ stdcall ImmAssociateContext(ptr ptr)
 @ stdcall ImmAssociateContextEx(ptr ptr long)
@@ -31,6 +34,7 @@
 @ stdcall ImmEscapeW(long ptr long ptr)
 @ stdcall ImmFreeLayout(long)
 @ stdcall ImmGenerateMessage(ptr)
+@ stdcall ImmGetAppCompatFlags(ptr)
 @ stdcall ImmGetCandidateListA(long long ptr long)
 @ stdcall ImmGetCandidateListCountA(long ptr)
 @ stdcall ImmGetCandidateListCountW(long ptr)
@@ -84,7 +88,6 @@
 @ stdcall ImmLockIMCC(ptr)
 @ stdcall ImmLockImeDpi(ptr)
 @ stdcall ImmNotifyIME(ptr long long long)
-@ stub ImmPenAuxInput
 @ stdcall ImmProcessKey(ptr long long long long)
 @ stdcall ImmPutImeMenuItemsIntoMappedFile(ptr)
 @ stdcall ImmReSizeIMCC(ptr long)

dll/win32/imm32/keymsg.c

@@ -752,18 +752,23 @@ UINT WINAPI ImmGetVirtualKey(HWND hWnd)
     return ret;
 }
 
+/***********************************************************************
+ *		ImmGetAppCompatFlags (IMM32.@)
+ */
 DWORD WINAPI ImmGetAppCompatFlags(HIMC hIMC)
 {
     PCLIENTIMC pClientIMC;
     DWORD dwFlags;
 
+    TRACE("(%p)\n", hIMC);
+
     pClientIMC = ImmLockClientImc(hIMC);
     if (IS_NULL_UNEXPECTEDLY(pClientIMC))
         return 0;
 
     dwFlags = pClientIMC->dwCompatFlags;
     ImmUnlockClientImc(pClientIMC);
-    return dwFlags;
+    return (dwFlags | g_aimm_compat_flags);
 }
 
 /***********************************************************************

dll/win32/imm32/precomp.h

@@ -75,6 +75,7 @@ extern PIMEDPI gpImeDpiList;
 extern PSERVERINFO gpsi;
 extern SHAREDINFO gSharedInfo;
 extern HANDLE ghImmHeap;
+extern DWORD g_aimm_compat_flags;
 
 BOOL Imm32GetSystemLibraryPath(LPWSTR pszPath, DWORD cchPath, LPCWSTR pszFileName);
 VOID APIENTRY LogFontAnsiToWide(const LOGFONTA *plfA, LPLOGFONTW plfW);

sdk/include/reactos/imm32_undoc.h

@@ -20,9 +20,20 @@ VOID WINAPI ImmUnlockClientImc(PCLIENTIMC pClientImc);
 PIMEDPI WINAPI ImmLockImeDpi(HKL hKL);
 VOID WINAPI ImmUnlockImeDpi(PIMEDPI pImeDpi);
 HRESULT WINAPI CtfImmTIMActivate(HKL hKL);
+DWORD WINAPI ImmGetAppCompatFlags(HIMC hIMC);
 
 HRESULT WINAPI CtfAImmActivate(_Out_opt_ HINSTANCE *phinstCtfIme);
 HRESULT WINAPI CtfAImmDeactivate(_In_ BOOL bDestroy);
+BOOL WINAPI CtfAImmIsIME(_In_ HKL hKL);
+BOOL WINAPI CtfImmIsCiceroStartedInThread(VOID);
+VOID WINAPI CtfImmSetAppCompatFlags(_In_ DWORD dwFlags);
+
+LRESULT WINAPI
+CtfImmDispatchDefImeMessage(
+    _In_ HWND hWnd,
+    _In_ UINT uMsg,
+    _In_ WPARAM wParam,
+    _In_ LPARAM lParam);
 
 #ifdef __cplusplus
 } // extern "C"