[gtk+] Don't access the parent level, there might not be one

[Kristian Rietveld <kristian src gnome org>]

commit 16c5339ea8209ebc38cab417c9116d360eb9bac6
Author: Kristian Rietveld <kris gtk org>
Date:   Tue Sep 8 15:51:10 2009 +0200

    Don't access the parent level, there might not be one
    
    Use the index instead, that can be -1.  A unit test has been added as
    well.

 gtk/gtktreemodelfilter.c |    7 ++++---
 gtk/tests/filtermodel.c  |   26 ++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtktreemodelfilter.c b/gtk/gtktreemodelfilter.c
index 214bfe4..09a8d44 100644
--- a/gtk/gtktreemodelfilter.c
+++ b/gtk/gtktreemodelfilter.c
@@ -1720,11 +1720,12 @@ gtk_tree_model_filter_row_deleted (GtkTreeModel *c_model,
   GtkTreeModelFilter *filter = GTK_TREE_MODEL_FILTER (data);
   GtkTreePath *path;
   GtkTreeIter iter;
-  FilterElt *elt, *parent = NULL;
+  FilterElt *elt;
   FilterLevel *level, *parent_level = NULL;
   gboolean emit_child_toggled = FALSE;
   gint offset;
   gint i;
+  gint parent_elt_index = -1;
 
   g_return_if_fail (c_path != NULL);
 
@@ -1887,7 +1888,7 @@ gtk_tree_model_filter_row_deleted (GtkTreeModel *c_model,
         {
           emit_child_toggled = TRUE;
           parent_level = level->parent_level;
-          parent = FILTER_LEVEL_PARENT_ELT (level);
+          parent_elt_index = level->parent_elt_index;
         }
 
       /* emit row_deleted */
@@ -1943,7 +1944,7 @@ gtk_tree_model_filter_row_deleted (GtkTreeModel *c_model,
 
       iter.stamp = filter->priv->stamp;
       iter.user_data = parent_level;
-      iter.user_data2 = parent;
+      iter.user_data2 = &g_array_index (parent_level->array, FilterElt, parent_elt_index);
 
       /* We set in_row_deleted to TRUE to avoid a level build triggered
        * by row-has-child-toggled (parent model could call iter_has_child
diff --git a/gtk/tests/filtermodel.c b/gtk/tests/filtermodel.c
index 52e4afc..91420c4 100644
--- a/gtk/tests/filtermodel.c
+++ b/gtk/tests/filtermodel.c
@@ -2071,6 +2071,30 @@ specific_filter_add_child (void)
   gtk_tree_store_set (store, &child, 0, "Hello", -1);
 }
 
+static void
+specific_list_store_clear (void)
+{
+  int i;
+  GtkTreeIter iter;
+  GtkListStore *list;
+  GtkTreeModel *filter;
+  GtkWidget *view;
+
+  list = gtk_list_store_new (1, G_TYPE_INT);
+  gtk_list_store_insert_with_values (list, &iter, 0, 0, 1, -1);
+  gtk_list_store_insert_with_values (list, &iter, 1, 0, 2, -1);
+  gtk_list_store_insert_with_values (list, &iter, 2, 0, 3, -1);
+  gtk_list_store_insert_with_values (list, &iter, 3, 0, 4, -1);
+  gtk_list_store_insert_with_values (list, &iter, 4, 0, 5, -1);
+  gtk_list_store_insert_with_values (list, &iter, 5, 0, 6, -1);
+  gtk_list_store_insert_with_values (list, &iter, 6, 0, 7, -1);
+  gtk_list_store_insert_with_values (list, &iter, 7, 0, 8, -1);
+
+  filter = gtk_tree_model_filter_new (GTK_TREE_MODEL (list), NULL);
+  view = gtk_tree_view_new_with_model (filter);
+
+  gtk_list_store_clear (list);
+}
 
 static void
 specific_bug_300089 (void)
@@ -2674,6 +2698,8 @@ main (int    argc,
                    specific_root_has_child_filter);
   g_test_add_func ("/FilterModel/specific/filter-add-child",
                    specific_filter_add_child);
+  g_test_add_func ("/FilterModel/specific/list-store-clear",
+                   specific_list_store_clear);
 
   g_test_add_func ("/FilterModel/specific/bug-300089",
                    specific_bug_300089);