gparam: Introduce nick and blurb setters

Instead of having them on GProperty, let's add the static nick and blurb
setters where they belong, i.e. GParamSpec.

gobject/gobject.symbols

@@ -222,6 +222,8 @@ g_param_spec_steal_qdata
 g_param_spec_set_qdata
 g_param_spec_set_qdata_full
 g_param_spec_get_qdata
+g_param_spec_set_static_nick
+g_param_spec_set_static_blurb
 g_param_value_convert
 g_param_value_defaults
 g_param_values_cmp

gobject/gparam.c

@@ -336,6 +336,70 @@ g_param_spec_get_blurb (GParamSpec *pspec)
   return NULL;
 }
 
+/**
+ * g_param_spec_set_static_nick:
+ * @pspec: a #GParamSpec
+ * @nick: the user-readable, and possibly translatable, name of the
+ *   #GParamSpec
+ *
+ * Sets a static string as the name of the #GParamSpec, for introspection
+ * purposes. The @nick string should be static and exist for the duration
+ * of the process.
+ *
+ * This function can only be called once, or if no nick was passed to
+ * g_param_spec_internal().
+ *
+ * Since: 2.30
+ */
+void
+g_param_spec_set_static_nick (GParamSpec *pspec,
+                              const char *nick)
+{
+  g_return_if_fail (G_IS_PARAM_SPEC (pspec));
+  g_return_if_fail (nick != NULL);
+
+  if (pspec->_nick != NULL)
+    {
+      g_critical (G_STRLOC ": Redefining the nick of a property is not allowed");
+      return;
+    }
+
+  pspec->_nick = (gchar *) nick;
+  pspec->flags |= G_PARAM_STATIC_NICK;
+}
+
+/**
+ * g_param_spec_set_static_blurb:
+ * @pspec: a #GParamSpec
+ * @blurb: the user-readable, and possibly translatable, description of the
+ *   #GParamSpec
+ *
+ * Sets a static string as the description of the #GParamSpec, for
+ * introspection purposes. The @blurb string should be static and exist for
+ * the duration of the process.
+ *
+ * This function can only be called once, or if no blurb was passed to
+ * g_param_spec_internal().
+ *
+ * Since: 2.30
+ */
+void
+g_param_spec_set_static_blurb (GParamSpec *pspec,
+                               const char *blurb)
+{
+  g_return_if_fail (G_IS_PARAM_SPEC (pspec));
+  g_return_if_fail (blurb != NULL);
+
+  if (pspec->_blurb != NULL)
+    {
+      g_critical (G_STRLOC ": Redefining the blurb of a property is not allowed");
+      return;
+    }
+
+  pspec->_blurb = (gchar *) blurb; 
+  pspec->flags |= G_PARAM_STATIC_BLURB;
+}
+
 static void
 canonicalize_key (gchar *key)
 {

gobject/gparam.h

@@ -304,12 +304,17 @@ gint		g_param_values_cmp		(GParamSpec    *pspec,
 const gchar *   g_param_spec_get_name           (GParamSpec    *pspec);
 const gchar *   g_param_spec_get_nick           (GParamSpec    *pspec);
 const gchar *   g_param_spec_get_blurb          (GParamSpec    *pspec);
+
+void            g_param_spec_set_static_nick    (GParamSpec    *pspec,
+                                                 const char    *nick);
+void            g_param_spec_set_static_blurb   (GParamSpec    *pspec,
+                                                 const char    *blurb);
+
 void            g_value_set_param               (GValue	       *value,
 						 GParamSpec    *param);
 GParamSpec*     g_value_get_param               (const GValue  *value);
 GParamSpec*     g_value_dup_param               (const GValue  *value);
 
-
 void           g_value_take_param               (GValue        *value,
 					         GParamSpec    *param);
 GLIB_DEPRECATED_FOR(g_value_take_param)