[gtk+] GtkWidgetAccessible: add a private struct

[Matthias Clasen <matthiasc src gnome org>]

commit d83294d313dcb7b444d1d9415f0f49c470129331
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 15 06:04:11 2012 -0400

    GtkWidgetAccessible: add a private struct
    
    Move instance fields to a private struct, in preparation
    for installing a11y headers.
    This also required removing access to GtkWidgetAccessible innards
    from several accessible implementations.

 gtk/a11y/gtkmenuaccessible.c     |    2 +-
 gtk/a11y/gtkmenuitemaccessible.c |    2 +-
 gtk/a11y/gtkwidgetaccessible.c   |   21 +++++++++++++++++++--
 gtk/a11y/gtkwidgetaccessible.h   |   10 +++++++---
 gtk/a11y/gtkwindowaccessible.c   |    2 +-
 5 files changed, 29 insertions(+), 8 deletions(-)
---
diff --git a/gtk/a11y/gtkmenuaccessible.c b/gtk/a11y/gtkmenuaccessible.c
index 3202521..4a07f13 100644
--- a/gtk/a11y/gtkmenuaccessible.c
+++ b/gtk/a11y/gtkmenuaccessible.c
@@ -31,7 +31,7 @@ gtk_menu_accessible_initialize (AtkObject *obj,
 
   obj->role = ATK_ROLE_MENU;
 
-  GTK_WIDGET_ACCESSIBLE (obj)->layer = ATK_LAYER_POPUP;
+  _gtk_widget_accessible_set_layer (GTK_WIDGET_ACCESSIBLE (obj), ATK_LAYER_POPUP);
 }
 
 static AtkObject *
diff --git a/gtk/a11y/gtkmenuitemaccessible.c b/gtk/a11y/gtkmenuitemaccessible.c
index 6495268..2e5a436 100644
--- a/gtk/a11y/gtkmenuitemaccessible.c
+++ b/gtk/a11y/gtkmenuitemaccessible.c
@@ -72,7 +72,7 @@ gtk_menu_item_accessible_initialize (AtkObject *obj,
         atk_object_set_parent (obj, gtk_widget_get_accessible (parent_widget));
     }
 
-  GTK_WIDGET_ACCESSIBLE (obj)->layer = ATK_LAYER_POPUP;
+  _gtk_widget_accessible_set_layer (GTK_WIDGET_ACCESSIBLE (obj), ATK_LAYER_POPUP);
 
   obj->role = ATK_ROLE_MENU_ITEM;
 
diff --git a/gtk/a11y/gtkwidgetaccessible.c b/gtk/a11y/gtkwidgetaccessible.c
index b37232a..9e8add7 100644
--- a/gtk/a11y/gtkwidgetaccessible.c
+++ b/gtk/a11y/gtkwidgetaccessible.c
@@ -24,6 +24,11 @@
 #include "gtkwidgetaccessible.h"
 #include "gtknotebookpageaccessible.h"
 
+struct _GtkWidgetAccessiblePrivate
+{
+  AtkLayer layer;
+};
+
 #define TOOLTIP_KEY "tooltip"
 
 extern GtkWidget *_focus_widget;
@@ -133,7 +138,7 @@ gtk_widget_accessible_initialize (AtkObject *obj,
   g_signal_connect (widget, "map", G_CALLBACK (map_cb), NULL);
   g_signal_connect (widget, "unmap", G_CALLBACK (map_cb), NULL);
 
-  GTK_WIDGET_ACCESSIBLE (obj)->layer = ATK_LAYER_WIDGET;
+  GTK_WIDGET_ACCESSIBLE (obj)->priv->layer = ATK_LAYER_WIDGET;
   obj->role = ATK_ROLE_UNKNOWN;
 
   gtk_widget_accessible_update_tooltip (GTK_WIDGET_ACCESSIBLE (obj), widget);
@@ -534,11 +539,16 @@ _gtk_widget_accessible_class_init (GtkWidgetAccessibleClass *klass)
   class->initialize = gtk_widget_accessible_initialize;
   class->get_attributes = gtk_widget_accessible_get_attributes;
   class->focus_event = gtk_widget_accessible_focus_event;
+
+  g_type_class_add_private (klass, sizeof (GtkWidgetAccessiblePrivate));
 }
 
 static void
 _gtk_widget_accessible_init (GtkWidgetAccessible *accessible)
 {
+  accessible->priv = G_TYPE_INSTANCE_GET_PRIVATE (accessible,
+                                                  GTK_TYPE_WIDGET_ACCESSIBLE,
+                                                  GtkWidgetAccessiblePrivate);
 }
 
 static void
@@ -615,7 +625,7 @@ gtk_widget_accessible_get_layer (AtkComponent *component)
 {
   GtkWidgetAccessible *accessible = GTK_WIDGET_ACCESSIBLE (component);
 
-  return accessible->layer;
+  return accessible->priv->layer;
 }
 
 static gboolean
@@ -833,3 +843,10 @@ gtk_widget_accessible_all_parents_visible (GtkWidget *widget)
 
   return result;
 }
+
+void
+_gtk_widget_accessible_set_layer (GtkWidgetAccessible *accessible,
+                                  AtkLayer             layer)
+{
+  accessible->priv->layer = layer;
+}
diff --git a/gtk/a11y/gtkwidgetaccessible.h b/gtk/a11y/gtkwidgetaccessible.h
index c88a3fb..3294c07 100644
--- a/gtk/a11y/gtkwidgetaccessible.h
+++ b/gtk/a11y/gtkwidgetaccessible.h
@@ -30,14 +30,15 @@ G_BEGIN_DECLS
 #define GTK_IS_WIDGET_ACCESSIBLE_CLASS(klass)          (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET_ACCESSIBLE))
 #define GTK_WIDGET_ACCESSIBLE_GET_CLASS(obj)           (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET_ACCESSIBLE, GtkWidgetAccessibleClass))
 
-typedef struct _GtkWidgetAccessible      GtkWidgetAccessible;
-typedef struct _GtkWidgetAccessibleClass GtkWidgetAccessibleClass;
+typedef struct _GtkWidgetAccessible        GtkWidgetAccessible;
+typedef struct _GtkWidgetAccessibleClass   GtkWidgetAccessibleClass;
+typedef struct _GtkWidgetAccessiblePrivate GtkWidgetAccessiblePrivate;
 
 struct _GtkWidgetAccessible
 {
   GtkAccessible parent;
 
-  AtkLayer layer;
+  GtkWidgetAccessiblePrivate *priv;
 };
 
 struct _GtkWidgetAccessibleClass
@@ -54,6 +55,9 @@ struct _GtkWidgetAccessibleClass
 
 GType _gtk_widget_accessible_get_type (void);
 
+void  _gtk_widget_accessible_set_layer (GtkWidgetAccessible *accessible,
+                                        AtkLayer             layer);
+
 G_END_DECLS
 
 #endif /* __GTK_WIDGET_ACCESSIBLE_H__ */
diff --git a/gtk/a11y/gtkwindowaccessible.c b/gtk/a11y/gtkwindowaccessible.c
index 475d142..4b88fb5 100644
--- a/gtk/a11y/gtkwindowaccessible.c
+++ b/gtk/a11y/gtkwindowaccessible.c
@@ -93,7 +93,7 @@ gtk_window_accessible_initialize (AtkObject *obj,
   ATK_OBJECT_CLASS (_gtk_window_accessible_parent_class)->initialize (obj, data);
 
   g_signal_connect (data, "window-state-event", G_CALLBACK (window_state_event_cb), NULL);
-  GTK_WIDGET_ACCESSIBLE (obj)->layer = ATK_LAYER_WINDOW;
+  _gtk_widget_accessible_set_layer (GTK_WIDGET_ACCESSIBLE (obj), ATK_LAYER_WINDOW);
 
   name = gtk_widget_get_name (widget);