1/*
2 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#ifndef RadioButtonGroupScope_h
22#define RadioButtonGroupScope_h
23
24#include "platform/heap/Handle.h"
25#include "wtf/Forward.h"
26#include "wtf/HashMap.h"
27#include "wtf/OwnPtr.h"
28#include "wtf/text/StringHash.h"
29
30namespace blink {
31
32class HTMLInputElement;
33class RadioButtonGroup;
34
35class RadioButtonGroupScope {
36    DISALLOW_ALLOCATION();
37public:
38    RadioButtonGroupScope();
39    ~RadioButtonGroupScope();
40    void trace(Visitor*);
41    void addButton(HTMLInputElement*);
42    void updateCheckedState(HTMLInputElement*);
43    void requiredAttributeChanged(HTMLInputElement*);
44    void removeButton(HTMLInputElement*);
45    HTMLInputElement* checkedButtonForGroup(const AtomicString& groupName) const;
46    bool isInRequiredGroup(HTMLInputElement*) const;
47
48private:
49    typedef WillBeHeapHashMap<AtomicString, OwnPtrWillBeMember<RadioButtonGroup>, CaseFoldingHash> NameToGroupMap;
50    OwnPtrWillBeMember<NameToGroupMap> m_nameToGroupMap;
51};
52
53} // namespace blink
54
55#endif // RadioButtonGroupScope_h
56