[PATCH v2 4/6] user32/tests: Add test for a window that doesn't want to be deactivated

[Gabriel Ivăncescu]

On Windows, if WM_NCACTIVATE returns FALSE, the window doesn't get
deactivated.

Signed-off-by: Gabriel Ivăncescu 
---
 dlls/user32/tests/win.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/dlls/user32/tests/win.c b/dlls/user32/tests/win.c
index 639eef4..e839d86 100644
--- a/dlls/user32/tests/win.c
+++ b/dlls/user32/tests/win.c
@@ -899,6 +899,17 @@ static LRESULT WINAPI tool_window_procA(HWND hwnd, UINT msg, WPARAM wparam, LPAR
     return DefWindowProcA(hwnd, msg, wparam, lparam);
 }

+static LRESULT WINAPI no_deactivation_procA(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    switch (msg)
+    {
+        case WM_NCACTIVATE:
+            DefWindowProcA(hwnd, msg, wparam, lparam);
+            return FALSE;
+    }
+    return DefWindowProcA(hwnd, msg, wparam, lparam);
+}
+
 static const WCHAR mainclassW[] = {'M','a','i','n','W','i','n','d','o','w','C','l','a','s','s','W',0};

static BOOL RegisterWindowClasses(void)
@@ -3205,6 +3216,18 @@ static void test_SetActiveWindow(HWND hwnd)
         check_active_state(hwnd, hwnd, hwnd);
     }
     DestroyWindow(hwnd2);
+
+    /* a window can disallow being deactivated by returning FALSE from WM_NCACTIVATE */
+    hwnd2 = CreateWindowExA(0, "MainWindowClass", "No Deactivation window", WS_OVERLAPPED | WS_VISIBLE,
+                            10, 10, 50, 50, hwnd, 0, GetModuleHandleA(NULL), NULL);
+    ok(hwnd2 != NULL, "failed to create No Deactivation window: 0x%08x\n", GetLastError());
+    SetWindowLongPtrA(hwnd2, GWLP_WNDPROC, (LONG_PTR)no_deactivation_procA);
+
+    SetActiveWindow(hwnd2);
+    check_wnd_state(hwnd2, hwnd2, hwnd2, 0);
+    SetActiveWindow(hwnd);
+    check_wnd_state(hwnd2, hwnd2, hwnd2, 0);
+    DestroyWindow(hwnd2);
 }

struct create_window_thread_params