1/*
2 * This file is part of the WebKit project.
3 *
4 * Copyright (C) 2013 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23#pragma once
24
25#include "FormAssociatedElement.h"
26
27namespace WebCore {
28
29// ValidityState is not a separate object, but rather an interface of FormAssociatedElement that
30// is published as part of the DOM. We could implement this as a base class of FormAssociatedElement,
31// but that would have a small runtime cost, and no significant benefit. We'd prefer to implement this
32// as a typedef of FormAssociatedElement, but that would require changes to bindings generation.
33class ValidityState : public FormAssociatedElement {
34};
35
36inline ValidityState* FormAssociatedElement::validity()
37{
38 // Because ValidityState adds nothing to FormAssociatedElement, we rely on it being safe
39 // to cast a FormAssociatedElement like this, even though it's not actually a ValidityState.
40 return static_cast<ValidityState*>(this);
41}
42
43} // namespace WebCore
44