[gtk/wip/ebassi/constraint-layout: 2/5] Move the Root interface to a private header

[Emmanuele Bassi <ebassi src gnome org>]

commit ca735a047ca30f9ae25e9bb7c0019628a27899c6
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Apr 9 14:13:37 2019 +0100

    Move the Root interface to a private header
    
    We don't expect out of tree implementations of GtkRoot, and having the
    interface structure private to the GTK code allows us to add virtual
    functions involving private types.

 gtk/gtkroot.h        | 19 -------------------
 gtk/gtkrootprivate.h | 19 +++++++++++++++++++
 2 files changed, 19 insertions(+), 19 deletions(-)
---
diff --git a/gtk/gtkroot.h b/gtk/gtkroot.h
index 4c7ae89e37..e2c7201b4d 100644
--- a/gtk/gtkroot.h
+++ b/gtk/gtkroot.h
@@ -34,25 +34,6 @@ G_BEGIN_DECLS
 GDK_AVAILABLE_IN_ALL
 G_DECLARE_INTERFACE (GtkRoot, gtk_root, GTK, ROOT, GtkWidget)
 
-/**
- * GtkRootIface:
- *
- * The list of functions that must be implemented for the #GtkRoot interface.
- */
-struct _GtkRootInterface
-{
-  /*< private >*/
-  GTypeInterface g_iface;
-
-  /*< public >*/
-  GdkDisplay *          (* get_display)                 (GtkRoot                *self);
-  GskRenderer *         (* get_renderer)                (GtkRoot                *self);
-
-  void                  (* get_surface_transform)       (GtkRoot                *root,
-                                                         int                    *x,
-                                                         int                    *y);
-};
-
 GDK_AVAILABLE_IN_ALL
 GtkWidget * gtk_root_get_for_surface (GdkSurface *surface);
 
diff --git a/gtk/gtkrootprivate.h b/gtk/gtkrootprivate.h
index 357bc6441f..ecdabe4a25 100644
--- a/gtk/gtkrootprivate.h
+++ b/gtk/gtkrootprivate.h
@@ -5,6 +5,25 @@
 
 G_BEGIN_DECLS
 
+/*
+ * GtkRootIface:
+ *
+ * The list of functions that must be implemented for the #GtkRoot interface.
+ */
+struct _GtkRootInterface
+{
+  /*< private >*/
+  GTypeInterface g_iface;
+
+  /*< public >*/
+  GdkDisplay *          (* get_display)                 (GtkRoot                *self);
+  GskRenderer *         (* get_renderer)                (GtkRoot                *self);
+
+  void                  (* get_surface_transform)       (GtkRoot                *root,
+                                                         int                    *x,
+                                                         int                    *y);
+};
+
 GdkDisplay *            gtk_root_get_display            (GtkRoot                *root);
 GskRenderer *           gtk_root_get_renderer           (GtkRoot                *self);