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https://gitlab.gnome.org/GNOME/gtk.git
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gtk: Set widget template children to NULL before destroy unref
This commit is contained in:
Jason Francis
parent
0c86b28828
commit
3fc7c97979
@ -7405,6 +7405,7 @@ gtk_widget_real_destroy (GtkWidget *object)
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{
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GtkWidgetClass *class;
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GSList *l;
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GHashTable *auto_children;
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#ifdef G_ENABLE_CONSISTENCY_CHECKS
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GSList *assertions = NULL;
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@ -7462,8 +7463,52 @@ gtk_widget_real_destroy (GtkWidget *object)
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}
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#endif /* G_ENABLE_CONSISTENCY_CHECKS */
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/* Release references to all automated children */
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g_object_set_qdata (G_OBJECT (widget), quark_auto_children, NULL);
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/* Prepare to release references to all automated children */
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auto_children = g_object_steal_qdata (G_OBJECT (widget), quark_auto_children);
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/* Set any automatic private data pointers to NULL and release child references */
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for (class = GTK_WIDGET_GET_CLASS (widget);
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GTK_IS_WIDGET_CLASS (class);
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class = g_type_class_peek_parent (class))
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{
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GHashTable *auto_child_hash = NULL;
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if (!class->priv->template)
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continue;
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if (auto_children)
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{
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GType type = G_TYPE_FROM_CLASS (class);
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g_hash_table_steal_extended (auto_children,
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GSIZE_TO_POINTER (type),
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NULL,
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(gpointer *) &auto_child_hash);
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}
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for (l = class->priv->template->children; l; l = l->next)
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{
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AutomaticChildClass *child_class = l->data;
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if (child_class->offset != 0)
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{
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gpointer field_p;
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/* Nullify instance private data for internal children */
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field_p = G_STRUCT_MEMBER_P (widget, child_class->offset);
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(* (gpointer *) field_p) = NULL;
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}
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/* Release the references in order after setting the pointer to NULL */
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if (auto_child_hash)
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g_hash_table_remove (auto_child_hash, child_class->name);
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}
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g_clear_pointer (&auto_child_hash, g_hash_table_unref);
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}
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/* Free the child reference hash table */
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g_clear_pointer (&auto_children, g_hash_table_unref);
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#ifdef G_ENABLE_CONSISTENCY_CHECKS
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for (l = assertions; l; l = l->next)
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@ -7481,29 +7526,6 @@ gtk_widget_real_destroy (GtkWidget *object)
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}
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g_slist_free (assertions);
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#endif /* G_ENABLE_CONSISTENCY_CHECKS */
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/* Set any automatic private data pointers to NULL */
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for (class = GTK_WIDGET_GET_CLASS (widget);
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GTK_IS_WIDGET_CLASS (class);
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class = g_type_class_peek_parent (class))
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{
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if (!class->priv->template)
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continue;
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for (l = class->priv->template->children; l; l = l->next)
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{
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AutomaticChildClass *child_class = l->data;
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if (child_class->offset != 0)
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{
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gpointer field_p;
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/* Nullify instance private data for internal children */
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field_p = G_STRUCT_MEMBER_P (widget, child_class->offset);
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(* (gpointer *) field_p) = NULL;
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}
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}
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}
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}
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/* Callers of add_mnemonic_label() should disconnect on ::destroy */
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@ -2687,6 +2687,113 @@ test_expressions (void)
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}
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}
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#define MY_GTK_BOX_TEMPLATE "\
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<interface>\n\
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<template class=\"MyGtkBox\" parent=\"GtkWidget\">\n\
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<child>\n\
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<object class=\"GtkLabel\" id=\"label\">\n\
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<property name=\"label\">First</property>\n\
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</object>\n\
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</child>\n\
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<child>\n\
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<object class=\"GtkLabel\" id=\"label2\">\n\
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<property name=\"label\">Second</property>\n\
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</object>\n\
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</child>\n\
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</template>\n\
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</interface>\n"
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#define MY_TYPE_GTK_BOX (my_gtk_box_get_type ())
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G_DECLARE_FINAL_TYPE (MyGtkBox, my_gtk_box, MY, GTK_BOX, GtkWidget)
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struct _MyGtkBox
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{
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GtkWidget parent_instance;
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GtkLabel *label;
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GtkLabel *label2;
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};
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G_DEFINE_TYPE (MyGtkBox, my_gtk_box, GTK_TYPE_WIDGET);
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static void
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my_gtk_box_init (MyGtkBox *grid)
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{
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gtk_widget_init_template (GTK_WIDGET (grid));
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}
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static void
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my_gtk_box_dispose (GObject *obj)
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{
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MyGtkBox *my_gtk_box = MY_GTK_BOX (obj);
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GtkWidget *child;
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while ((child = gtk_widget_get_first_child (GTK_WIDGET (my_gtk_box))))
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gtk_widget_unparent (child);
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G_OBJECT_CLASS (my_gtk_box_parent_class)->dispose (obj);
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}
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static void
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my_gtk_box_class_init (MyGtkBoxClass *klass)
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{
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GBytes *template = g_bytes_new_static (MY_GTK_BOX_TEMPLATE, strlen (MY_GTK_BOX_TEMPLATE));
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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gtk_widget_class_set_template (widget_class, template);
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gtk_widget_class_bind_template_child (widget_class, MyGtkBox, label);
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gtk_widget_class_bind_template_child (widget_class, MyGtkBox, label2);
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G_OBJECT_CLASS (klass)->dispose = my_gtk_box_dispose;
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}
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typedef struct
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{
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MyGtkBox *my_gtk_box;
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guint destroy_count;
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} BoxDestroyData;
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static void
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my_label_destroy (GtkLabel *label, BoxDestroyData *data)
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{
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g_assert_true (MY_IS_GTK_BOX (data->my_gtk_box));
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/* Make sure the other label is null if it was disposed first */
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g_assert_true (!data->my_gtk_box->label2 || GTK_IS_LABEL (data->my_gtk_box->label2));
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data->destroy_count++;
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}
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static void
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my_label2_destroy (GtkLabel *label2, BoxDestroyData *data)
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{
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g_assert_true (MY_IS_GTK_BOX (data->my_gtk_box));
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/* Make sure the other label is null if it was disposed first */
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g_assert_true (!data->my_gtk_box->label || GTK_IS_LABEL (data->my_gtk_box->label));
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data->destroy_count++;
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}
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static void
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test_child_dispose_order (void)
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{
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BoxDestroyData data = { 0, };
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/* make sure the type we are trying to register does not exist */
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g_assert_false (g_type_from_name ("MyGtkBox"));
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/* create the template object */
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data.my_gtk_box = g_object_ref_sink (g_object_new (MY_TYPE_GTK_BOX, NULL));
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/* Check everything is fine */
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g_assert_true (g_type_from_name ("MyGtkBox"));
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g_assert_true (MY_IS_GTK_BOX (data.my_gtk_box));
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g_assert_true (GTK_IS_LABEL (data.my_gtk_box->label));
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g_assert_true (GTK_IS_LABEL (data.my_gtk_box->label2));
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/* Check if both labels are destroyed */
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g_signal_connect (data.my_gtk_box->label, "destroy", G_CALLBACK (my_label_destroy), &data);
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g_signal_connect (data.my_gtk_box->label2, "destroy", G_CALLBACK (my_label2_destroy), &data);
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g_object_unref (data.my_gtk_box);
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g_assert_cmpuint (data.destroy_count, ==, 2);
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}
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int
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main (int argc, char **argv)
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{
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@ -2734,6 +2841,7 @@ main (int argc, char **argv)
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g_test_add_func ("/Builder/Shortcuts", test_shortcuts);
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g_test_add_func ("/Builder/Transforms", test_transforms);
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g_test_add_func ("/Builder/Expressions", test_expressions);
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g_test_add_func ("/Builder/Child Dispose Order", test_child_dispose_order);
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return g_test_run();
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}
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