API: Change semantics of gtk_container_get_child_path()

Include the child widget path in the returned path now. This allows
customizing the path of the current widgets - like adding flags to child
widgets (and maybe siblings in the future).

gtk/gtkcontainer.c

@@ -2334,6 +2334,8 @@ gtk_container_real_get_path_for_child (GtkContainer *container,
       g_list_free_1 (cur);
     }
 
+  gtk_widget_path_append_for_widget (path, child);
+
   return path;
 }
 
@@ -3362,7 +3364,7 @@ _gtk_container_get_reallocate_redraws (GtkContainer *container)
  * @child: a child of @container
  *
  * Returns a newly created widget path representing all the widget hierarchy
- * from the toplevel down to @child (this one not being included).
+ * from the toplevel down to and including @child.
  *
  * Returns: A newly created #GtkWidgetPath
  **/

gtk/gtkframe.c

@@ -384,7 +384,9 @@ gtk_frame_get_path_for_child (GtkContainer *container,
   path = GTK_CONTAINER_CLASS (gtk_frame_parent_class)->get_path_for_child (container, child);
 
   if (child == priv->label_widget)
-    gtk_widget_path_iter_add_class (path, -1, GTK_STYLE_CLASS_FRAME);
+    gtk_widget_path_iter_add_class (path,
+                                    gtk_widget_path_length (path) - 2,
+                                    GTK_STYLE_CLASS_FRAME);
 
   return path;
 }

gtk/gtknotebook.c

@@ -4454,7 +4454,6 @@ gtk_notebook_get_path_for_child (GtkContainer *container,
   GtkNotebook *notebook;
   GtkNotebookPage *page;
   GtkWidgetPath *path;
-  GtkRegionFlags flags;
   GList *c;
 
   path = GTK_CONTAINER_CLASS (gtk_notebook_parent_class)->get_path_for_child (container, widget);
@@ -4474,8 +4473,10 @@ gtk_notebook_get_path_for_child (GtkContainer *container,
   if (!c)
     return path;
 
-  flags = _gtk_notebook_get_tab_flags (notebook, page);
-  gtk_widget_path_iter_add_region (path, -1, GTK_STYLE_REGION_TAB, flags);
+  gtk_widget_path_iter_add_region (path, 
+                                   gtk_widget_path_length (path) - 2,
+                                   GTK_STYLE_REGION_TAB,
+                                   _gtk_notebook_get_tab_flags (notebook, page));
 
   return path;
 }

gtk/gtktreeview.c

@@ -8540,6 +8540,8 @@ gtk_tree_view_get_path_for_child (GtkContainer *container,
       break;
     }
 
+  gtk_widget_path_append_for_widget (path, child);
+
   return path;
 }
 

gtk/gtkwidget.c

@@ -14312,9 +14312,9 @@ gtk_widget_get_path (GtkWidget *widget)
            * situation.
            */
           widget->priv->path = gtk_widget_path_new ();
-        }
     
-      gtk_widget_path_append_for_widget (widget->priv->path, widget);
+          gtk_widget_path_append_for_widget (widget->priv->path, widget);
+        }
 
       if (widget->priv->context)
         gtk_style_context_set_path (widget->priv->context,