third_party/WebKit/Source/core/dom/VisitedLinkState.h

   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/style/ComputedStyleConstants.h"
  34 #include "platform/LinkHash.h"
  35 #include "wtf/HashSet.h"
  36
  37 namespace blink {
  38
  39 class Document;
  40
  41 class VisitedLinkState : public NoBaseWillBeGarbageCollectedFinalized<VisitedLinkState> {
  42     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(VisitedLinkState);
  43 public:
  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     DECLARE_TRACE();
  60
  61 private:
  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