[PATCH 0/1] MR3184: win32u: Don't affect nonclient area unles requested.

[Arek Hiler (＠ivyl)]

Overwatch 2 calls `FlashWindowEx()` with `dwFlags = FLASHW_TRAY | FLASHW_TIMERNOFG` whenever you join an online game or respawn after getting killed. Without this MR the call causes us to send `WM_NCACTIVATE` with `wparam = FALSE`. This confuses the game and it stops reading controller input until you Alt+Tab out and back in to "reactivate" the nonclient area.

`WM_NCACTIVATE` should be only sent when there's `FLASHW_CAPTION` or `FLASHW_STOP` specified.

[PATCH 1/1] win32u: Don't affect nonclient area unles requested.

[Arkadiusz Hiler]

From: Arkadiusz Hiler

The state of the caption / nonclient area should be only changed when
FLASHW_CAPTION or FLASHW_STOP are used.
---
 dlls/win32u/window.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index 871227645a7..f008735f2e3 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -4511,11 +4511,11 @@ BOOL WINAPI NtUserFlashWindowEx( FLASHWINFO *info )

win = get_win_ptr( info->hwnd );
         if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return FALSE;
-        if (info->dwFlags && !(win->flags & WIN_NCACTIVATED))
+        if (info->dwFlags & FLASHW_CAPTION && !(win->flags & WIN_NCACTIVATED))
         {
             win->flags |= WIN_NCACTIVATED;
         }
-        else
+        else if (!info->dwFlags)
         {
             win->flags &= ~WIN_NCACTIVATED;
         }
@@ -4536,7 +4536,10 @@ BOOL WINAPI NtUserFlashWindowEx( FLASHWINFO *info )
         else wparam = (hwnd == NtUserGetForegroundWindow());

release_win_ptr( win );
-        send_message( hwnd, WM_NCACTIVATE, wparam, 0 );
+
+        if (!info->dwFlags || info->dwFlags & FLASHW_CAPTION)
+            send_message( hwnd, WM_NCACTIVATE, wparam, 0 );
+
         user_driver->pFlashWindowEx( info );
         return wparam;
     }

[Connor McAdams (＠cmcadams)]

Commit message typo, should probably be 'unless' :)