[PATCH 1/5] uxtheme: Allow EnableThemeDialogTexture() to set flags in multiple steps.

[Zhiyi Zhang]

For example, set ETDT_USETABTEXTURE first and then set ETDT_ENABLE to activate dialog theming.

Signed-off-by: Zhiyi Zhang 
---
 dlls/uxtheme/draw.c         | 28 +++++++++++++++++++++++-----
 dlls/uxtheme/tests/system.c |  8 ++------
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/dlls/uxtheme/draw.c b/dlls/uxtheme/draw.c
index b6e5f0230e5..4aac46f3fed 100644
--- a/dlls/uxtheme/draw.c
+++ b/dlls/uxtheme/draw.c
@@ -52,14 +52,32 @@ extern ATOM atDialogThemeEnabled;
 /***********************************************************************
  *      EnableThemeDialogTexture                            (UXTHEME.@)
  */
-HRESULT WINAPI EnableThemeDialogTexture(HWND hwnd, DWORD dwFlags)
+HRESULT WINAPI EnableThemeDialogTexture(HWND hwnd, DWORD new_flag)
 {
+    DWORD old_flag = 0;
     BOOL res;

-    TRACE("(%p,0x%08x\n", hwnd, dwFlags);
-    res = SetPropW (hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled), 
-                    UlongToHandle(dwFlags|0x80000000));
-        /* 0x80000000 serves as a "flags set" flag */
+    TRACE("(%p,%#x\n", hwnd, new_flag);
+
+    new_flag &= ETDT_VALIDBITS;
+
+    if (new_flag == 0)
+        return S_OK;
+
+    if (new_flag & ETDT_DISABLE)
+    {
+        new_flag = ETDT_DISABLE;
+        old_flag = 0;
+    }
+
+    if (new_flag & ~ETDT_DISABLE)
+    {
+        old_flag = HandleToUlong(GetPropW(hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled)));
+        old_flag &= ~ETDT_DISABLE;
+    }
+
+    new_flag = new_flag | old_flag;
+    res = SetPropW(hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled), UlongToHandle(new_flag));
     return res ? S_OK : HRESULT_FROM_WIN32(GetLastError());
  }

diff --git a/dlls/uxtheme/tests/system.c b/dlls/uxtheme/tests/system.c
index 93994fa8364..4a5a6d291fc 100644
--- a/dlls/uxtheme/tests/system.c
+++ b/dlls/uxtheme/tests/system.c
@@ -1645,16 +1645,15 @@ static void test_EnableThemeDialogTexture(void)
     {
         DWORD flag;
         BOOL enabled;
-        BOOL todo;
     }
     invalid_flag_tests[] =
     {
-        {0, FALSE, TRUE},
+        {0, FALSE},
         {ETDT_DISABLE | ETDT_ENABLE, FALSE},
         {ETDT_ENABLETAB | ETDT_ENABLEAEROWIZARDTAB, TRUE},
         {ETDT_USETABTEXTURE | ETDT_USEAEROWIZARDTABTEXTURE, TRUE},
         {ETDT_VALIDBITS, FALSE},
-        {~ETDT_VALIDBITS, FALSE, TRUE},
+        {~ETDT_VALIDBITS, FALSE},
         {~ETDT_VALIDBITS | ETDT_DISABLE, FALSE}
     };

@@ -1989,7 +1988,6 @@ static void test_EnableThemeDialogTexture(void)
         hr = EnableThemeDialogTexture(dialog, invalid_flag_tests[i].flag);
         ok(hr == S_OK, "EnableThemeDialogTexture failed, hr %#x.\n", hr);
         ret = IsThemeDialogTextureEnabled(dialog);
-        todo_wine_if(invalid_flag_tests[i].todo)
         ok(ret == invalid_flag_tests[i].enabled, "Wrong dialog texture status.\n");
         EndDialog(dialog, 0);

@@ -2020,7 +2018,6 @@ static void test_EnableThemeDialogTexture(void)
                         "EnableThemeDialogTexture first flag", FALSE);
             ret = IsThemeDialogTextureEnabled(dialog);
             /* Non-zero flags without ETDT_DISABLE enables dialog texture */
-            todo_wine_if(flags[i] == 0)
             ok(ret == (!(flags[i] & ETDT_DISABLE) && flags[i]), "Wrong dialog texture status.\n");

child = GetDlgItem(dialog, 100);
@@ -2045,7 +2042,6 @@ static void test_EnableThemeDialogTexture(void)
             if (flags[j])
                 ok(ret == !(flags[j] & ETDT_DISABLE), "Wrong dialog texture status.\n");
             else
-                todo_wine_if(!flags[i] || flags[i] == ETDT_DISABLE || flags[i] == (ETDT_DISABLE | ETDT_ENABLE))
                 ok(ret == (!(flags[i] & ETDT_DISABLE) && flags[i]), "Wrong dialog texture status.\n");
             lr = SendMessageA(dialog, WM_ERASEBKGND, (WPARAM)child_hdc, 0);
             ok(lr != 0, "WM_ERASEBKGND failed.\n");