[gtk/wip.win32.fixes: 16/19] gdksurface-win32.c: Decouple mapped state from surface creation

[Chun-wei Fan <fanchunwei src gnome org>]

commit 15cd9e4070099a75fae010effcb55d3b88545dab
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Dec 11 10:29:28 2020 +0800

    gdksurface-win32.c: Decouple mapped state from surface creation
    
    In line with what is done with the Wayland backend, enable the mapped state
    independently as needed from the toplevel surface presentation, and also enable
    the mapped state if necessary when presenting the popup surface.

 gdk/win32/gdksurface-win32.c | 42 +++++++++++++++++++-----------------------
 1 file changed, 19 insertions(+), 23 deletions(-)
---
diff --git a/gdk/win32/gdksurface-win32.c b/gdk/win32/gdksurface-win32.c
index 76b6f2abd7..acdf69ceac 100644
--- a/gdk/win32/gdksurface-win32.c
+++ b/gdk/win32/gdksurface-win32.c
@@ -1246,11 +1246,24 @@ gdk_win32_surface_layout_popup (GdkSurface     *surface,
     }
 }
 
+static void
+maybe_notify_mapped (GdkSurface *surface)
+{
+  if (surface->destroyed)
+    return;
+
+  if (!GDK_SURFACE_IS_MAPPED (surface))
+    {
+      gdk_surface_set_is_mapped (surface, TRUE);
+      gdk_surface_invalidate_rect (surface, NULL);
+    }
+}
+
 static void
 show_popup (GdkSurface *surface)
 {
   gdk_win32_surface_raise (surface);
-  gdk_surface_set_is_mapped (surface, TRUE);
+  maybe_notify_mapped (surface);
   show_window_internal (surface, FALSE, FALSE);
   gdk_surface_invalidate_rect (surface, NULL);
 }
@@ -4749,25 +4762,6 @@ gdk_win32_toplevel_class_init (GdkWin32ToplevelClass *class)
   gdk_toplevel_install_properties (object_class, 1);
 }
 
-static void
-show_surface (GdkSurface *surface)
-{
-  gboolean was_mapped;
-
-  if (surface->destroyed)
-    return;
-
-  was_mapped = GDK_SURFACE_IS_MAPPED (surface);
-
-  if (!was_mapped)
-    gdk_surface_set_is_mapped (surface, TRUE);
-
-  gdk_win32_surface_show (surface, FALSE);
-
-  if (!was_mapped)
-    gdk_surface_invalidate_rect (surface, NULL);
-}
-
 static gboolean
 gdk_win32_toplevel_present (GdkToplevel       *toplevel,
                             GdkToplevelLayout *layout)
@@ -4837,7 +4831,8 @@ gdk_win32_toplevel_present (GdkToplevel       *toplevel,
         gdk_win32_surface_unfullscreen (surface);
     }
 
-  show_surface (surface);
+  gdk_win32_surface_show (surface, FALSE);
+  maybe_notify_mapped (surface);
 
   if (size.shadow.is_valid)
     {
@@ -4931,8 +4926,9 @@ gdk_win32_drag_surface_present (GdkDragSurface *drag_surface,
 {
   GdkSurface *surface = GDK_SURFACE (drag_surface);
 
-  gdk_win32_surface_resize (surface, width, height);
-  show_surface (surface);
+  gdk_win32_surface_resize (surface, width, height);  
+  gdk_win32_surface_show (surface, FALSE);
+  maybe_notify_mapped (surface);
 
   return TRUE;
 }