[gtk/wip.win32.fixes: 2/5] gdksurface-win32.c: Decouple mapped state from surface creation

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

commit 94e5084b461de8e528bc4309cc38c11829b7b672
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 9556ab2618..52e9f37091 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;
 }