cssnode: Split into 3 objects

- GtkCssWidgetNode
  for style contexts owned by a widget
- GtkCssPathNode
  for style contexts using a GtkWidgetPath
- GtkCssTransientNode
  for nodes created with gtk_style_context_save()/restore()

gtk/gtkcsspathnodeprivate.h

@@ -0,0 +1,58 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2014 Benjamin Otte <otte@gnome.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_CSS_PATH_NODE_PRIVATE_H__
+#define __GTK_CSS_PATH_NODE_PRIVATE_H__
+
+#include "gtkcssnodeprivate.h"
+#include "gtkwidgetpath.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_PATH_NODE           (gtk_css_path_node_get_type ())
+#define GTK_CSS_PATH_NODE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_PATH_NODE, GtkCssPathNode))
+#define GTK_CSS_PATH_NODE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_PATH_NODE, GtkCssPathNodeClass))
+#define GTK_IS_CSS_PATH_NODE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_PATH_NODE))
+#define GTK_IS_CSS_PATH_NODE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_PATH_NODE))
+#define GTK_CSS_PATH_NODE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_PATH_NODE, GtkCssPathNodeClass))
+
+typedef struct _GtkCssPathNode           GtkCssPathNode;
+typedef struct _GtkCssPathNodeClass      GtkCssPathNodeClass;
+
+struct _GtkCssPathNode
+{
+  GtkCssNode node;
+
+  GtkWidgetPath *path;
+};
+
+struct _GtkCssPathNodeClass
+{
+  GtkCssNodeClass node_class;
+};
+
+GType                   gtk_css_path_node_get_type         (void) G_GNUC_CONST;
+
+GtkCssNode *            gtk_css_path_node_new              (void);
+
+void                    gtk_css_path_node_set_widget_path  (GtkCssPathNode *node,
+                                                            GtkWidgetPath  *path);
+GtkWidgetPath *         gtk_css_path_node_get_widget_path  (GtkCssPathNode *node);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_PATH_NODE_PRIVATE_H__ */