[gtk: 1/2] GdkWin32: Remove implicit_grab_surface

[Luca Bacci <lbacci src gnome org>]

commit 43476c09ed618d4ac13c2553e890fa34743975a9
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Mon Feb 21 17:38:50 2022 +0100

    GdkWin32: Remove implicit_grab_surface

 gdk/win32/gdkevents-win32.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)
---
diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index a004714266..debc66e5d7 100644
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -134,15 +134,6 @@ static GSourceFuncs event_funcs = {
   NULL
 };
 
-/* Whenever we do an implicit grab (call SetCapture() after
- * a mouse button is held down), we ref the capturing surface
- * and keep that ref here. When mouse buttons are released,
- * we remove the implicit grab and synthesize a crossing
- * event from the grab surface to whatever surface is now
- * under cursor.
- */
-static GdkSurface *implicit_grab_surface = NULL;
-
 static GdkSurface *mouse_window = NULL;
 static GdkSurface *mouse_window_ignored_leave = NULL;
 static int current_x, current_y;
@@ -2224,10 +2215,7 @@ gdk_event_translate (MSG *msg,
       if (pointer_grab == NULL)
        {
          SetCapture (GDK_SURFACE_HWND (window));
-         g_set_object (&implicit_grab_surface, g_object_ref (window));
        }
-      else
-       g_set_object (&implicit_grab_surface, NULL);
 
       generate_button_event (GDK_BUTTON_PRESS, button,
                             window, msg);
@@ -2262,7 +2250,7 @@ gdk_event_translate (MSG *msg,
 
       g_set_object (&window, find_window_for_mouse_event (window, msg));
 
-      if (pointer_grab == NULL && implicit_grab_surface != NULL)
+      if (pointer_grab != NULL && pointer_grab->implicit)
        {
          int state = build_pointer_event_state (msg);
 
@@ -2285,19 +2273,16 @@ gdk_event_translate (MSG *msg,
 
              synthesize_crossing_events (display,
                                           _gdk_device_manager->system_pointer,
-                                         implicit_grab_surface, new_window,
+                                          pointer_grab->surface, new_window,
                                          GDK_CROSSING_UNGRAB,
                                          &msg->pt,
                                          0, /* TODO: Set right mask */
                                          _gdk_win32_get_next_tick (msg->time),
                                          FALSE);
-             g_set_object (&implicit_grab_surface, NULL);
              g_set_object (&mouse_window, new_window);
              mouse_window_ignored_leave = NULL;
            }
        }
-      else
-       g_set_object (&implicit_grab_surface, NULL);
 
       generate_button_event (GDK_BUTTON_RELEASE, button,
                             window, msg);