[PATCH v4 02/10] win32u: Keep the builtin IME UI window in win32u struct imc.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/imm32/imm.c  | 28 ++++++++++++++++++++++++----
 dlls/win32u/imm.c | 11 +++++++++++
 include/ntuser.h  |  1 +
 3 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/dlls/imm32/imm.c b/dlls/imm32/imm.c
index d7b9326bd1b..1ce9cbdc570 100644
--- a/dlls/imm32/imm.c
+++ b/dlls/imm32/imm.c
@@ -622,11 +622,21 @@ static INPUTCONTEXT *ime_find_input_context( struct ime *ime, HIMC himc )
     return &entry->context;
 }

+static BOOL CALLBACK enum_himc_set_builtin_ui( HIMC himc, LPARAM lparam )
+{
+    NtUserUpdateInputContext( himc, NtUserInputContextBuiltinUI, lparam );
+    return TRUE;
+}
+
 static void imc_release_ime( struct imc *imc, struct ime *ime )
 {
     INPUTCONTEXT *ctx;

-    if (imc->ui_hwnd) DestroyWindow( imc->ui_hwnd );
+    if (imc->ui_hwnd)
+    {
+        ImmEnumInputContext( 0, enum_himc_set_builtin_ui, (LPARAM)0 );
+        DestroyWindow( imc->ui_hwnd );
+    }
     imc->ui_hwnd = NULL;
     ime->pImeSelect( imc->handle, FALSE );

@@ -1017,7 +1027,10 @@ static HWND get_ime_ui_window(void)
         imc->ui_hwnd = CreateWindowExW( WS_EX_TOOLWINDOW, ime->ui_class, NULL, WS_POPUP, 0, 0, 1, 1,
                                         ImmGetDefaultIMEWnd( 0 ), 0, ime->module, 0 );
         SetWindowLongPtrW( imc->ui_hwnd, IMMGWL_IMC, (LONG_PTR)imc->handle );
+
+        if (ime->is_builtin) ImmEnumInputContext( 0, enum_himc_set_builtin_ui, (LPARAM)imc->ui_hwnd );
     }
+
     return imc->ui_hwnd;
 }

@@ -1026,10 +1039,17 @@ static HWND get_ime_ui_window(void)
  */
 HIMC WINAPI ImmCreateContext(void)
 {
-    struct imc *new_context;
+    struct imc *imc;
+    struct ime *ime;
+    HIMC himc;
+
+    if (!(imc = create_input_context( 0 ))) return 0;
+    himc = imc->handle;
+
+    if ((imc = default_input_context()) && (ime = imc_select_ime( imc )) && ime->is_builtin)
+        NtUserUpdateInputContext( himc, NtUserInputContextBuiltinUI, (UINT_PTR)imc->ui_hwnd );

-    if (!(new_context = create_input_context(0))) return 0;
-    return new_context->handle;
+    return himc;
 }

static BOOL IMM_DestroyContext(HIMC hIMC)
diff --git a/dlls/win32u/imm.c b/dlls/win32u/imm.c
index 7dee4912e27..bf04cf82b92 100644
--- a/dlls/win32u/imm.c
+++ b/dlls/win32u/imm.c
@@ -40,6 +40,8 @@ struct imc
     struct user_object obj;
     DWORD    thread_id;
     UINT_PTR client_ptr;
+
+    HWND builtin_ui; /* IME UI window when builtin IME is used */
 };

struct imm_thread_data
@@ -80,6 +82,7 @@ HIMC WINAPI NtUserCreateInputContext( UINT_PTR client_ptr )
     if (!(imc = malloc( sizeof(*imc) ))) return 0;
     imc->client_ptr = client_ptr;
     imc->thread_id = GetCurrentThreadId();
+    imc->builtin_ui = 0;
     if (!(handle = alloc_user_handle( &imc->obj, NTUSER_OBJ_IMC )))
     {
         free( imc );
@@ -127,6 +130,10 @@ BOOL WINAPI NtUserUpdateInputContext( HIMC handle, UINT attr, UINT_PTR value )
         imc->client_ptr = value;
         break;

+    case NtUserInputContextBuiltinUI:
+        imc->builtin_ui = (HWND)value;
+        break;
+
     default:
         FIXME( "unknown attr %u\n", attr );
         ret = FALSE;
@@ -156,6 +163,10 @@ UINT_PTR WINAPI NtUserQueryInputContext( HIMC handle, UINT attr )
         ret = imc->thread_id;
         break;

+    case NtUserInputContextBuiltinUI:
+        ret = (UINT_PTR)imc->builtin_ui;
+        break;
+
     default:
         FIXME( "unknown attr %u\n", attr );
         ret = 0;
diff --git a/include/ntuser.h b/include/ntuser.h
index 3d43eb476e4..8da69cc1e76 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -453,6 +453,7 @@ struct draw_scroll_bar_params
 /* NtUserUpdateInputContext param, not compatible with Window */
 enum input_context_attr
 {
+    NtUserInputContextBuiltinUI = -1,
     NtUserInputContextClientPtr,
     NtUserInputContextThreadId,
 };