1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
4 * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
5 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
6 * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
7 * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
8 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
9 * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
10 * Copyright (C) Research In Motion Limited 2011. All rights reserved.
11 * Copyright (C) 2012 Google Inc. All rights reserved.
12 *
13 * This library is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Library General Public
15 * License as published by the Free Software Foundation; either
16 * version 2 of the License, or (at your option) any later version.
17 *
18 * This library is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21 * Library General Public License for more details.
22 *
23 * You should have received a copy of the GNU Library General Public License
24 * along with this library; see the file COPYING.LIB.  If not, write to
25 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
26 * Boston, MA 02110-1301, USA.
27 */
28
29#ifndef VisitedLinkState_h
30#define VisitedLinkState_h
31
32#include "core/dom/Element.h"
33#include "core/rendering/style/RenderStyleConstants.h"
34#include "platform/LinkHash.h"
35#include "wtf/HashSet.h"
36
37namespace blink {
38
39class Document;
40
41class VisitedLinkState : public NoBaseWillBeGarbageCollectedFinalized<VisitedLinkState> {
42    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
43public:
44    static PassOwnPtrWillBeRawPtr<VisitedLinkState> create(const Document& document)
45    {
46        return adoptPtrWillBeNoop(new VisitedLinkState(document));
47    }
48
49    void invalidateStyleForAllLinks();
50    void invalidateStyleForLink(LinkHash);
51
52    EInsideLink determineLinkState(const Element& element)
53    {
54        if (element.isLink())
55            return determineLinkStateSlowCase(element);
56        return NotInsideLink;
57    }
58
59    void trace(Visitor*);
60
61private:
62    explicit VisitedLinkState(const Document&);
63    const Document& document() const { return *m_document; }
64
65    EInsideLink determineLinkStateSlowCase(const Element&);
66
67    RawPtrWillBeMember<const Document> m_document;
68    HashSet<LinkHash, LinkHashHash> m_linksCheckedForVisitedState;
69};
70
71}
72
73#endif
74
75