Workaround for crash in bug #330728. Patch from Caolan McNamara.

2007-03-01  Kjartan Maraas  <kmaraas@gnome.org>

	* e-table/gal-a11y-e-cell-tree.c: (kill_view_cb),
	(ectr_subcell_weak_ref), (gal_a11y_e_cell_tree_new):
	Workaround for crash in bug #330728. Patch from
	Caolan McNamara.

svn path=/trunk/; revision=33268

1 files changed, 29 insertions, 0 deletions

diff --git a/a11y/e-table/gal-a11y-e-cell-tree.c b/a11y/e-table/gal-a11y-e-cell-tree.c
index 068658cafa..b86ecc01bd 100644
--- a/a11y/e-table/gal-a11y-e-cell-tree.c
+++ b/a11y/e-table/gal-a11y-e-cell-tree.c
@@ -50,9 +50,30 @@ ectr_model_row_changed_cb (ETableModel *etm,
 }
 
 static void
+kill_view_cb(ECellView *subcell_view,
+             GList *subcell_a11ies)
+{
+        GList *node;
+        GalA11yECell *subcell;
+        for (node = subcell_a11ies; node != NULL; node = g_list_next (node))
+        {
+            subcell = GAL_A11Y_E_CELL(node->data);
+            if (subcell && subcell->cell_view == subcell_view)
+            {
+                fprintf(stderr, "subcell_view %p deleted before the a11y object %p\n", subcell_view, subcell);
+                subcell->cell_view = NULL;
+            }
+        }
+}
+
+static void
 ectr_subcell_weak_ref (GalA11yECellTree *a11y,
 		       GalA11yECell     *subcell_a11y)
 {
+        ECellView *subcell_view = subcell_a11y ? subcell_a11y->cell_view : 0;
+        if (subcell_a11y && subcell_view && subcell_view->kill_view_cb_data)
+            g_list_remove(subcell_view->kill_view_cb_data, subcell_a11y);
+
 	g_signal_handler_disconnect (GAL_A11Y_E_CELL (a11y)->item->table_model,
 				     a11y->model_row_changed_id);
 	g_object_unref (a11y);
@@ -207,6 +228,14 @@ gal_a11y_e_cell_tree_new (ETableItem *item,
 		g_signal_connect (item->table_model, "model_row_changed",
 				  G_CALLBACK (ectr_model_row_changed_cb),
 				  subcell_a11y);
+
+        if (subcell_a11y && subcell_view)
+        {
+            subcell_view->kill_view_cb = kill_view_cb;
+            if (!g_list_find(subcell_view->kill_view_cb_data, subcell_a11y))
+                subcell_view->kill_view_cb_data = g_list_append(subcell_view->kill_view_cb_data, subcell_a11y);
+        }
+
 	g_object_weak_ref (G_OBJECT (subcell_a11y), (GWeakNotify) ectr_subcell_weak_ref, a11y);
 
 	return subcell_a11y;