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inspector: Reset the treewalk when required

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The tree walk holds a tree iter, which will become invalid
when we either remove the row that it points to or remove
all rows.

Reset the tree walk in those cases to avoid a crash that
was pointed out by Bastien Nocera.
This commit is contained in:
Matthias Clasen 2016-03-11 13:52:36 -05:00
parent 2e34ce8f7c
commit 5e68c4e62d
1 changed files with 27 additions and 4 deletions
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31
gtk/inspector/object-tree.c
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@ -610,20 +610,31 @@ on_selection_changed (GtkTreeSelection *selection,
g_signal_emit (wt, signals[OBJECT_SELECTED], 0, object);
}
typedef struct {
GObject *dead_object;
GtkTreeWalk *walk;
GtkTreePath *walk_pos;
} RemoveData;
static gboolean
remove_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer data)
{
GObject *dead_object = data;
RemoveData *remove_data = data;
GObject *lookup;
gtk_tree_model_get (model, iter, OBJECT, &lookup, -1);
if (lookup == dead_object)
if (lookup == remove_data->dead_object)
{
if (remove_data->walk_pos != NULL &&
gtk_tree_path_compare (path, remove_data->walk_pos) == 0)
gtk_tree_walk_reset (remove_data->walk, NULL);
gtk_tree_store_remove (GTK_TREE_STORE (model), iter);
return TRUE;
}
@ -634,8 +645,20 @@ static void
gtk_object_tree_remove_dead_object (gpointer data, GObject *dead_object)
{
GtkInspectorObjectTree *wt = data;
GtkTreeIter iter;
RemoveData remove_data;
gtk_tree_model_foreach (GTK_TREE_MODEL (wt->priv->model), remove_cb, dead_object);
remove_data.dead_object = dead_object;
remove_data.walk = wt->priv->walk;
if (gtk_tree_walk_get_position (wt->priv->walk, &iter))
remove_data.walk_pos = gtk_tree_model_get_path (GTK_TREE_MODEL (wt->priv->model), &iter);
else
remove_data.walk_pos = NULL;
gtk_tree_model_foreach (GTK_TREE_MODEL (wt->priv->model), remove_cb, &remove_data);
if (remove_data.walk_pos)
gtk_tree_path_free (remove_data.walk_pos);
}
static gboolean
@ -661,6 +684,7 @@ clear_store (GtkInspectorObjectTree *wt)
{
gtk_tree_model_foreach (GTK_TREE_MODEL (wt->priv->model), weak_unref_cb, wt);
gtk_tree_store_clear (wt->priv->model);
gtk_tree_walk_reset (wt->priv->walk, NULL);
}
}
@ -679,7 +703,6 @@ map_or_unmap (GSignalInvocationHint *ihint,
gtk_tree_store_set (wt->priv->model, &iter,
SENSITIVE, gtk_widget_get_mapped (widget),
-1);
return TRUE;
}