win32u: Use KeUserModeCallback for ImmProcessKey and ImmTranslateMessage calls.

dlls/user32/user_main.c

@@ -133,8 +133,6 @@ static NTSTATUS try_finally( NTSTATUS (CDECL *func)( void *), void *arg,
 
 static const struct user_callbacks user_funcs =
 {
-    ImmProcessKey,
-    ImmTranslateMessage,
     NtWaitForMultipleObjects,
     post_dde_message,
     unpack_dde_message,
@@ -163,6 +161,17 @@ static NTSTATUS WINAPI User32DrawText( const struct draw_text_params *params, UL
     return DrawTextW( params->hdc, params->str, size / sizeof(WCHAR), params->rect, params->flags );
 }
 
+static NTSTATUS WINAPI User32ImmProcessKey( const struct imm_process_key_params *params, ULONG size )
+{
+    return ImmProcessKey( params->hwnd, params->hkl, params->vkey, params->key_data, 0 );
+}
+
+static NTSTATUS WINAPI User32ImmTranslateMessage( const struct imm_translate_message_params *params,
+                                                  ULONG size )
+{
+    return ImmTranslateMessage( params->hwnd, params->msg, params->wparam, params->key_data );
+}
+
 static NTSTATUS WINAPI User32LoadImage( const struct load_image_params *params, ULONG size )
 {
     HANDLE ret = LoadImageW( params->hinst, params->name, params->type,
@@ -206,6 +215,8 @@ static const void *kernel_callback_table[NtUserCallCount] =
     User32DrawScrollBar,
     User32DrawText,
     User32FreeCachedClipboardData,
+    User32ImmProcessKey,
+    User32ImmTranslateMessage,
     User32LoadDriver,
     User32LoadImage,
     User32LoadSysMenu,

dlls/win32u/imm.c

@@ -27,6 +27,7 @@
 #include <pthread.h>
 #include "win32u_private.h"
 #include "ntuser_private.h"
+#include "ddk/imm.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(imm);
@@ -391,3 +392,22 @@ void cleanup_imm_thread(void)
 
     NtUserDestroyInputContext( thread_info->client_info.default_imc );
 }
+
+BOOL WINAPI ImmProcessKey( HWND hwnd, HKL hkl, UINT vkey, LPARAM key_data, DWORD unknown )
+{
+    struct imm_process_key_params params =
+        { .hwnd = hwnd, .hkl = hkl, .vkey = vkey, .key_data = key_data };
+    void *ret_ptr;
+    ULONG ret_len;
+    return KeUserModeCallback( NtUserImmProcessKey, &params, sizeof(params), &ret_ptr, &ret_len );
+}
+
+BOOL WINAPI ImmTranslateMessage( HWND hwnd, UINT msg, WPARAM wparam, LPARAM key_data )
+{
+    struct imm_translate_message_params params =
+        { .hwnd = hwnd, .msg = msg, .wparam = wparam, .key_data = key_data };
+    void *ret_ptr;
+    ULONG ret_len;
+    return KeUserModeCallback( NtUserImmTranslateMessage, &params, sizeof(params),
+                               &ret_ptr, &ret_len );
+}

dlls/win32u/message.c

@@ -32,6 +32,7 @@
 #include "hidusage.h"
 #include "dbt.h"
 #include "dde.h"
+#include "ddk/imm.h"
 #include "wine/server.h"
 #include "wine/debug.h"
 
@@ -1362,9 +1363,8 @@ static BOOL process_keyboard_message( MSG *msg, UINT hw_id, HWND hwnd_filter,
     if (remove) accept_hardware_message( hw_id );
     msg->pt = point_phys_to_win_dpi( msg->hwnd, msg->pt );
 
-    if (remove && msg->message == WM_KEYDOWN && user_callbacks)
-        if (user_callbacks->pImmProcessKey( msg->hwnd, NtUserGetKeyboardLayout(0),
-                                            msg->wParam, msg->lParam, 0 ))
+    if (remove && msg->message == WM_KEYDOWN)
+        if (ImmProcessKey( msg->hwnd, NtUserGetKeyboardLayout(0), msg->wParam, msg->lParam, 0 ))
             msg->wParam = VK_PROCESSKEY;
 
     return TRUE;
@@ -2969,8 +2969,7 @@ BOOL WINAPI NtUserTranslateMessage( const MSG *msg, UINT flags )
         return TRUE;
 
     case VK_PROCESSKEY:
-        return user_callbacks && user_callbacks->pImmTranslateMessage( msg->hwnd, msg->message,
-                                                                       msg->wParam, msg->lParam );
+        return ImmTranslateMessage( msg->hwnd, msg->message, msg->wParam, msg->lParam );
     }
 
     NtUserGetKeyboardState( state );

dlls/win32u/ntuser_private.h

@@ -32,8 +32,6 @@ struct hardware_msg_data;
 
 struct user_callbacks
 {
-    BOOL (WINAPI *pImmProcessKey)(HWND, HKL, UINT, LPARAM, DWORD);
-    BOOL (WINAPI *pImmTranslateMessage)(HWND, UINT, WPARAM, LPARAM);
     NTSTATUS (WINAPI *pNtWaitForMultipleObjects)(ULONG,const HANDLE*,BOOLEAN,BOOLEAN,const LARGE_INTEGER*);
     BOOL (CDECL *post_dde_message)( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam, DWORD dest_tid,
                                     DWORD type );

include/ntuser.h

@@ -37,6 +37,8 @@ enum
     NtUserDrawScrollBar,
     NtUserDrawText,
     NtUserFreeCachedClipboardData,
+    NtUserImmProcessKey,
+    NtUserImmTranslateMessage,
     NtUserLoadDriver,
     NtUserLoadImage,
     NtUserLoadSysMenu,
@@ -181,6 +183,24 @@ struct free_cached_data_params
     HANDLE handle;
 };
 
+/* NtUserImmProcessKey params */
+struct imm_process_key_params
+{
+    HWND hwnd;
+    HKL hkl;
+    UINT vkey;
+    LPARAM key_data;
+};
+
+/* NtUserImmTranslateMessage params */
+struct imm_translate_message_params
+{
+    HWND hwnd;
+    UINT msg;
+    WPARAM wparam;
+    LPARAM key_data;
+};
+
 /* NtUserLoadImage params */
 struct load_image_params
 {