[gtk/wip/chergert/quartz4u] implement lower vfunc

[Christian Hergert <chergert src gnome org>]

commit 0e1cc2d32d8be85cc5adf44e2e4cfc14cc806b77
Author: Christian Hergert <chergert redhat com>
Date:   Tue Apr 28 17:21:16 2020 -0700

    implement lower vfunc

 gdk/macos/.gdkmacostoplevelsurface.c.swp | Bin 24576 -> 0 bytes
 gdk/macos/gdkmacostoplevelsurface.c      |  18 ++++++++----------
 2 files changed, 8 insertions(+), 10 deletions(-)
---
diff --git a/gdk/macos/gdkmacostoplevelsurface.c b/gdk/macos/gdkmacostoplevelsurface.c
index 7c3857fbb2f..51e9bdb3e3e 100644
--- a/gdk/macos/gdkmacostoplevelsurface.c
+++ b/gdk/macos/gdkmacostoplevelsurface.c
@@ -49,11 +49,7 @@ _gdk_macos_toplevel_surface_present (GdkToplevel       *toplevel,
                                      GdkToplevelLayout *layout)
 {
   GdkMacosToplevelSurface *self = (GdkMacosToplevelSurface *)toplevel;
-
-  g_assert (GDK_IS_MACOS_TOPLEVEL_SURFACE (self));
-
   [self->window makeKeyAndOrderFront:self->window];
-
   return TRUE;
 }
 
@@ -61,11 +57,15 @@ static gboolean
 _gdk_macos_toplevel_surface_minimize (GdkToplevel *toplevel)
 {
   GdkMacosToplevelSurface *self = (GdkMacosToplevelSurface *)toplevel;
-
-  g_assert (GDK_IS_MACOS_TOPLEVEL_SURFACE (self));
-
   [self->window miniaturize:self->window];
+  return TRUE;
+}
 
+static gboolean
+_gdk_macos_toplevel_surface_lower (GdkToplevel *toplevel)
+{
+  GdkMacosToplevelSurface *self = (GdkMacosToplevelSurface *)toplevel;
+  [self->window orderBack:self->window];
   return TRUE;
 }
 
@@ -74,9 +74,6 @@ _gdk_macos_toplevel_surface_focus (GdkToplevel *toplevel,
                                    guint32      timestamp)
 {
   GdkMacosToplevelSurface *self = (GdkMacosToplevelSurface *)toplevel;
-
-  g_assert (GDK_IS_MACOS_TOPLEVEL_SURFACE (self));
-
   [self->window makeKeyAndOrderFront:self->window];
 }
 
@@ -85,6 +82,7 @@ toplevel_iface_init (GdkToplevelInterface *iface)
 {
   iface->present = _gdk_macos_toplevel_surface_present;
   iface->minimize = _gdk_macos_toplevel_surface_minimize;
+  iface->lower = _gdk_macos_toplevel_surface_lower;
   iface->focus = _gdk_macos_toplevel_surface_focus;
 }