[gtk/gtk-4-6: 2/4] GdkWin32: Correct generation of crossing events when holding an implicit grab

[Luca Bacci <lbacci src gnome org>]

commit 7538ff9798d6acd46d55e85b90b092490a350a6e
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Mon Apr 4 15:29:52 2022 +0200

    GdkWin32: Correct generation of crossing events when holding an implicit grab
    
    Fixes #4722

 gdk/win32/gdkevents-win32.c | 43 +++++++++----------------------------------
 1 file changed, 9 insertions(+), 34 deletions(-)
---
diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index 3f71e2a8f4..6012751952 100644
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -2322,60 +2322,35 @@ gdk_event_translate (MSG *msg,
 
       pen_touch_input = FALSE;
 
-      new_window = window;
-
-      if (pointer_grab != NULL)
-       {
-         POINT pt;
-         pt = msg->pt;
-
-         new_window = NULL;
-         hwnd = WindowFromPoint (pt);
-         if (hwnd != NULL)
-           {
-             POINT client_pt = pt;
-
-             ScreenToClient (hwnd, &client_pt);
-             GetClientRect (hwnd, &rect);
-             if (PtInRect (&rect, client_pt))
-               new_window = gdk_win32_handle_table_lookup (hwnd);
-           }
-
-         if (!pointer_grab->owner_events &&
-             new_window != NULL &&
-             new_window != pointer_grab->surface)
-           new_window = NULL;
-       }
+      g_set_object (&window, find_window_for_mouse_event (window, msg));
 
-      if (mouse_window != new_window)
+      if (mouse_window != window)
        {
          GDK_NOTE (EVENTS, g_print (" mouse_window %p -> %p",
                                     mouse_window ? GDK_SURFACE_HWND (mouse_window) : NULL,
-                                    new_window ? GDK_SURFACE_HWND (new_window) : NULL));
+                                     window ? GDK_SURFACE_HWND (window) : NULL));
          synthesize_crossing_events (display,
                                       _gdk_device_manager->system_pointer,
-                                     mouse_window, new_window,
+                                      mouse_window, window,
                                      GDK_CROSSING_NORMAL,
                                      &msg->pt,
                                      0, /* TODO: Set right mask */
                                      _gdk_win32_get_next_tick (msg->time),
                                      FALSE);
-         g_set_object (&mouse_window, new_window);
+         g_set_object (&mouse_window, window);
          mouse_window_ignored_leave = NULL;
-         if (new_window != NULL)
-           track_mouse_event (TME_LEAVE, GDK_SURFACE_HWND (new_window));
+         if (window != NULL)
+           track_mouse_event (TME_LEAVE, GDK_SURFACE_HWND (window));
        }
-      else if (new_window != NULL &&
-              new_window == mouse_window_ignored_leave)
+      else if (window != NULL && window == mouse_window_ignored_leave)
        {
          /* If we ignored a leave event for this window and we're now getting
             input again we need to re-arm the mouse tracking, as that was
             cancelled by the mouseleave. */
          mouse_window_ignored_leave = NULL;
-         track_mouse_event (TME_LEAVE, GDK_SURFACE_HWND (new_window));
+          track_mouse_event (TME_LEAVE, GDK_SURFACE_HWND (window));
        }
 
-      g_set_object (&window, find_window_for_mouse_event (window, msg));
       impl = GDK_WIN32_SURFACE (window);
 
       /* If we haven't moved, don't create any GDK event. Windows