Move rendering into st-theme-node-drawing.c

The idea behind this move is that we have a lot more control over
rendering if StWidget isn't a big pile of actors, and things are
more efficient.

https://bugzilla.gnome.org/show_bug.cgi?id=607500

src/st/st-theme-node-private.h

@@ -0,0 +1,86 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+#ifndef __ST_THEME_NODE_PRIVATE_H__
+#define __ST_THEME_NODE_PRIVATE_H__
+
+#include <gdk/gdk.h>
+
+#include "st-theme-node.h"
+
+G_BEGIN_DECLS
+
+struct _StThemeNode {
+  GObject parent;
+
+  StThemeContext *context;
+  StThemeNode *parent_node;
+  StTheme *theme;
+
+  PangoFontDescription *font_desc;
+
+  ClutterColor background_color;
+  /* If gradient is set, then background_color is the gradient start */
+  StGradientType background_gradient_type;
+  ClutterColor background_gradient_end;
+
+  ClutterColor foreground_color;
+  ClutterColor border_color[4];
+
+  int border_width[4];
+  int border_radius[4];
+  guint padding[4];
+
+  int width;
+  int height;
+  int min_width;
+  int min_height;
+  int max_width;
+  int max_height;
+
+  char *background_image;
+  StBorderImage *border_image;
+  StShadow *shadow;
+
+  GType element_type;
+  char *element_id;
+  char *element_class;
+  char *pseudo_class;
+  char *inline_style;
+
+  CRDeclaration **properties;
+  int n_properties;
+
+  /* We hold onto these separately so we can destroy them on finalize */
+  CRDeclaration *inline_properties;
+
+  guint properties_computed : 1;
+  guint geometry_computed : 1;
+  guint background_computed : 1;
+  guint foreground_computed : 1;
+  guint border_image_computed : 1;
+  guint shadow_computed : 1;
+  guint link_type : 2;
+
+  /* Graphics state */
+  float alloc_width;
+  float alloc_height;
+
+  CoglHandle shadow_material;
+  CoglHandle background_texture;
+  CoglHandle border_texture;
+  CoglHandle corner_texture;
+};
+
+struct _StThemeNodeClass {
+  GObjectClass parent_class;
+
+};
+
+void _st_theme_node_ensure_background (StThemeNode *node);
+void _st_theme_node_ensure_geometry (StThemeNode *node);
+
+void _st_theme_node_init_drawing_state (StThemeNode *node);
+void _st_theme_node_free_drawing_state (StThemeNode *node);
+
+G_END_DECLS
+
+#endif /* __ST_THEME_NODE_PRIVATE_H__ */