/* the basic assumption is that if either the source or the target
* goes away then the binding does not exist any more and it should
* be reaped as well
*/
static void
weak_unbind (gpointer user_data,
GObject *where_the_object_was)
{
GBinding *binding = user_data;
/* if what went away was the source, unset it so that GBinding::finalize
* does not try to access it; otherwise, disconnect everything and remove
* the GBinding instance from the object's qdata
*/
if (binding->source == where_the_object_was)
binding->source = NULL;
else
{
if (binding->source_notify != 0)
g_signal_handler_disconnect (binding->source, binding->source_notify);
g_object_weak_unref (binding->source, weak_unbind, user_data);
remove_binding_qdata (binding->source, binding);
binding->source_notify = 0;
binding->source = NULL;
}
/* as above, but with the target */
if (binding->target == where_the_object_was)
binding->target = NULL;
else
{
if (binding->target_notify != 0)
g_signal_handler_disconnect (binding->target, binding->target_notify);
g_object_weak_unref (binding->target, weak_unbind, user_data);
remove_binding_qdata (binding->target, binding);
binding->target_notify = 0;
binding->target = NULL;
}
/* this will take care of the binding itself */
g_object_unref (binding);
}
static inline void
g_binding_unbind_internal (GBinding *binding,
gboolean unref_binding)
{
/* dispose of the transformation data */
if (binding->notify != NULL)
{
binding->notify (binding->transform_data);
binding->transform_data = NULL;
binding->notify = NULL;
}
if (binding->source != NULL)
{
if (binding->source_notify != 0)
g_signal_handler_disconnect (binding->source, binding->source_notify);
g_object_weak_unref (binding->source, weak_unbind, binding);
remove_binding_qdata (binding->source, binding);
binding->source_notify = 0;
binding->source = NULL;
}
if (binding->target != NULL)
{
if (binding->target_notify != 0)
g_signal_handler_disconnect (binding->target, binding->target_notify);
g_object_weak_unref (binding->target, weak_unbind, binding);
remove_binding_qdata (binding->target, binding);
binding->target_notify = 0;
binding->target = NULL;
}
if (unref_binding)
g_object_unref (binding);
}
static void
g_binding_finalize (GObject *gobject)
{
GBinding *binding = G_BINDING (gobject);
/* dispose of the transformation data */
if (binding->notify != NULL)
{
binding->notify (binding->transform_data);
binding->transform_data = NULL;
binding->notify = NULL;
}
/* we need this in case the source and target instance are still
* valid, and it was the GBinding that was unreferenced
*/
if (binding->source != NULL)
{
if (binding->source_notify != 0)
g_signal_handler_disconnect (binding->source, binding->source_notify);
g_object_weak_unref (binding->source, weak_unbind, binding);
remove_binding_qdata (binding->source, binding);
}
if (binding->target != NULL)
{
if (binding->target_notify != 0)
g_signal_handler_disconnect (binding->target, binding->target_notify);
g_object_weak_unref (binding->target, weak_unbind, binding);
remove_binding_qdata (binding->target, binding);
}
G_OBJECT_CLASS (g_binding_parent_class)->finalize (gobject);
}
