[PATCH 1/1] user32/tests: Check that a message window brought topmost does not defocus other windows.

[Giovanni Mascellani]

From: Giovanni Mascellani

libOVR brings a message window topmost claiming that this way it receives
WM_DEVICECHANGE faster. Currently, in Wine, this causes a WM_KILLFOCUS to
be sent to the actual topmost window, which in turn causes "Shantae: Risky's
Revenge" to minimize. The effect is that the game automatically minimizes
as soon as it is launched, which is incorrect.

Signed-off-by: Giovanni Mascellani 
---
 dlls/user32/tests/win.c | 49 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/dlls/user32/tests/win.c b/dlls/user32/tests/win.c
index 3727efb1b41..c268a837214 100644
--- a/dlls/user32/tests/win.c
+++ b/dlls/user32/tests/win.c
@@ -8899,6 +8899,54 @@ static void test_hwnd_message(void)
     DestroyWindow(hwnd);
 }

+static BOOL message_window_topmost_destroying = FALSE;
+
+static LRESULT WINAPI message_window_topmost_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    if (msg == WM_KILLFOCUS && !message_window_topmost_destroying)
+        todo_wine ok(msg != WM_KILLFOCUS, "WM_KILLFOCUS message was delivered\n");
+
+    return DefWindowProcW(hwnd, msg, wparam, lparam);
+}
+
+static void test_message_window_topmost(void)
+{
+    WNDCLASSW cls = { 0 };
+    ATOM atom;
+    HWND hwnd, hwnd_msg;
+    MSG msg;
+
+    cls.lpfnWndProc = message_window_topmost_proc;
+    cls.hInstance = GetModuleHandleW(NULL);
+    cls.lpszClassName = L"test_message_window_topmost";
+    atom = RegisterClassW(&cls);
+    ok(!!atom, "Cannot register window class\n");
+
+    hwnd = CreateWindowW(L"test_message_window_topmost", L"main window", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, GetModuleHandleW(NULL), NULL);
+    ok(!!hwnd, "Cannot create main window\n");
+
+    hwnd_msg = CreateWindowW(L"test_message_window_topmost", L"message window", 0,
+            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, HWND_MESSAGE, NULL, GetModuleHandleW(NULL), NULL);
+    ok(!!hwnd_msg, "Cannot create message window\n");
+
+    SetWindowPos(hwnd_msg, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
+
+    while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
+    {
+        TranslateMessage(&msg);
+        DispatchMessageW(&msg);
+    }
+
+    message_window_topmost_destroying = TRUE;
+
+    ok(DestroyWindow(hwnd_msg), "Cannot destroy main window\n");
+    ok(DestroyWindow(hwnd), "Cannot destroy message window\n");
+
+    ok(UnregisterClassW(L"test_message_window_topmost", GetModuleHandleW(NULL)), "Cannot unregister class\n");
+}
+
+
 static void test_layered_window(void)
 {
     HWND hwnd, child;
@@ -13089,6 +13137,7 @@ START_TEST(win)
     test_thick_child_size(hwndMain);
     test_fullscreen();
     test_hwnd_message();
+    test_message_window_topmost();
     test_nonclient_area(hwndMain);
     test_params();
     test_GetWindowModuleFileName();