This bug can be triggered on Mutter because it unminimizes windows when handling map requests.
Also see https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/x11/events.c#L1525 for how map requests are handled.
Signed-off-by: Zhiyi Zhang zzhang@codeweavers.com --- v3: Supersede 227676~227677. Fix test failures.
dlls/user32/tests/win.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/dlls/user32/tests/win.c b/dlls/user32/tests/win.c index cfcec5cc78f..f47fcd2fe65 100644 --- a/dlls/user32/tests/win.c +++ b/dlls/user32/tests/win.c @@ -7420,7 +7420,9 @@ static void test_ShowWindow(void) RECT rcMain, rc, rcMinimized, rcClient, rcEmpty, rcMaximized, rcResized, rcNonClient, rcBroken; LPARAM ret; MONITORINFO mon_info; - unsigned int i; + unsigned int i, timeout = 0; + COLORREF color; + HDC hdc;
DWORD test_style[] = { @@ -7693,6 +7695,30 @@ static void test_ShowWindow(void)
flush_events(TRUE);
+ /* Test SW_SHOWMINIMIZED shouldn't restore windows from minimized state */ + SetWindowPos(hwndMain, 0, 100, 100, 0, 0, SWP_NOZORDER | SWP_NOSIZE); + hwnd = CreateWindowA("static", "test", WS_POPUP, 100, 100, 200, 200, NULL, NULL, NULL, NULL); + ok(hwnd != NULL, "CreateWindowA failed, error %d.\n", GetLastError()); + ShowWindow(hwnd, SW_SHOWMINIMIZED); + flush_events(TRUE); + + hdc = GetDC(0); + color = GetPixel(hdc, 150, 150); + /* Desktop pixels may take a while to update */ + while (color != 0xffffff && timeout < 1000) + { + Sleep(100); + timeout += 100; + color = GetPixel(hdc, 150, 150); + } + /* The window rectangle of hwndMain is (100, 100, 300, 300). If the window manager unminimizes + * hwnd, hwnd will end up obscuring hwndMain. Mutter is such a window manager that unminimizes + * windows when handling map requests and thus can demonstrate this bug */ + todo_wine_if(color != 0xffffff) + ok(color == 0xffffff, "Expected color %#x, got %#x.\n", 0xffffff, color); + ReleaseDC(0, hdc); + DestroyWindow(hwnd); + /* test maximize and restore windows without setting WS_CAPTION */
for (i = 0; i < ARRAY_SIZE(test_style); ++i)