styleproperty: Move id handling

only real style properties can have an id, so let
GtkCssStylePropertyClass handle it.

gtk/gtkcssstyleproperty.c

@@ -22,15 +22,123 @@
 
 #include "gtkcssstylepropertyprivate.h"
 
+#include "gtkintl.h"
+
+enum {
+  PROP_0,
+  PROP_ID,
+};
+
 G_DEFINE_TYPE (GtkCssStyleProperty, _gtk_css_style_property, GTK_TYPE_STYLE_PROPERTY)
 
+static void
+gtk_css_style_property_constructed (GObject *object)
+{
+  GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
+  GtkCssStylePropertyClass *klass = GTK_CSS_STYLE_PROPERTY_GET_CLASS (property);
+
+  property->id = klass->style_properties->len;
+  g_ptr_array_add (klass->style_properties, property);
+
+  G_OBJECT_CLASS (_gtk_css_style_property_parent_class)->constructed (object);
+}
+
+static void
+gtk_css_style_property_get_property (GObject    *object,
+                                     guint       prop_id,
+                                     GValue     *value,
+                                     GParamSpec *pspec)
+{
+  GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
+
+  switch (prop_id)
+    {
+    case PROP_ID:
+      g_value_set_boolean (value, property->id);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
 static void
 _gtk_css_style_property_class_init (GtkCssStylePropertyClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->constructed = gtk_css_style_property_constructed;
+  object_class->get_property = gtk_css_style_property_get_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_ID,
+                                   g_param_spec_uint ("id",
+                                                      P_("ID"),
+                                                      P_("The numeric id for quick access"),
+                                                      0, G_MAXUINT, 0,
+                                                      G_PARAM_READABLE));
+
+  klass->style_properties = g_ptr_array_new ();
 }
 
+
 static void
 _gtk_css_style_property_init (GtkCssStyleProperty *style_property)
 {
 }
 
+/**
+ * _gtk_css_style_property_get_n_properties:
+ *
+ * Gets the number of style properties. This number can increase when new
+ * theme engines are loaded. Shorthand properties are not included here.
+ *
+ * Returns: The number of style properties.
+ **/
+guint
+_gtk_css_style_property_get_n_properties (void)
+{
+  GtkCssStylePropertyClass *klass;
+
+  klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
+
+  return klass->style_properties->len;
+}
+
+/**
+ * _gtk_css_style_property_lookup_by_id:
+ * @id: the id of the property
+ *
+ * Gets the style property with the given id. All style properties (but not
+ * shorthand properties) are indexable by id so that it's easy to use arrays
+ * when doing style lookups.
+ *
+ * Returns: (transfer none): The style property with the given id
+ **/
+GtkCssStyleProperty *
+_gtk_css_style_property_lookup_by_id (guint id)
+{
+  GtkCssStylePropertyClass *klass;
+
+  klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
+
+  return g_ptr_array_index (klass->style_properties, id);
+}
+
+/**
+ * _gtk_css_style_property_get_id:
+ * @property: the property
+ *
+ * Gets the id for the given property. IDs are used to allow using arrays
+ * for style lookups.
+ *
+ * Returns: The id of the property
+ **/
+guint
+_gtk_css_style_property_get_id (GtkCssStyleProperty *property)
+{
+  g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), 0);
+
+  return property->id;
+}
+

gtk/gtkcssstylepropertyprivate.h

@@ -38,15 +38,23 @@ typedef struct _GtkCssStylePropertyClass      GtkCssStylePropertyClass;
 struct _GtkCssStyleProperty
 {
   GtkStyleProperty parent;
+
+  guint id;
 };
 
 struct _GtkCssStylePropertyClass
 {
   GtkStylePropertyClass parent_class;
+
+  GPtrArray *style_properties;
 };
 
 GType                   _gtk_css_style_property_get_type        (void) G_GNUC_CONST;
 
+guint                   _gtk_css_style_property_get_n_properties(void);
+GtkCssStyleProperty *   _gtk_css_style_property_lookup_by_id    (guint                   id);
+
+guint                   _gtk_css_style_property_get_id          (GtkCssStyleProperty    *property);
 
 G_END_DECLS
 

gtk/gtkstyleproperty.c

@@ -60,7 +60,6 @@ enum {
 
 static GHashTable *parse_funcs = NULL;
 static GHashTable *print_funcs = NULL;
-static GPtrArray *__style_property_array = NULL;
 
 G_DEFINE_ABSTRACT_TYPE (GtkStyleProperty, _gtk_style_property, G_TYPE_OBJECT)
 
@@ -1616,25 +1615,13 @@ transparent_color_value_parse (GtkCssParser *parser,
 guint
 _gtk_style_property_get_count (void)
 {
-  return __style_property_array ? __style_property_array->len : 0;
+  return _gtk_css_style_property_get_n_properties ();
 }
 
 GtkStyleProperty *
 _gtk_style_property_get (guint id)
 {
-  g_assert (__style_property_array);
-  
-  return g_ptr_array_index (__style_property_array, id);
-}
-
-static void
-_gtk_style_property_generate_id (GtkStyleProperty *node)
-{
-  if (__style_property_array == NULL)
-    __style_property_array = g_ptr_array_new ();
-
-  node->id = __style_property_array->len;
-  g_ptr_array_add (__style_property_array, node);
+  return GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (id));
 }
 
 static void
@@ -1842,7 +1829,10 @@ _gtk_style_property_get_id (GtkStyleProperty *property)
 {
   g_return_val_if_fail (property != NULL, FALSE);
 
-  return property->id;
+  if (GTK_IS_CSS_STYLE_PROPERTY (property))
+    return _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
+  else
+    return 0;
 }
 
 static gboolean
@@ -2545,8 +2535,6 @@ _gtk_style_property_register (GParamSpec               *pspec,
   node->parse_func = parse_func;
   node->print_func = print_func;
 
-  _gtk_style_property_generate_id (node);
-
   /* initialize the initial value */
   if (initial_value)
     {

gtk/gtkstylepropertyprivate.h

@@ -62,7 +62,6 @@ struct _GtkStyleProperty
 
   GParamSpec               *pspec;
   GtkStylePropertyFlags     flags;
-  guint                     id;
   GValue                    initial_value;
 
   GtkStylePropertyParser    property_parse_func;