Home | History | Annotate | Download | only in html 
      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Simon Hausmann <hausmann (at) kde.org>
      5  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  *
     22  */
     23 
     24 #ifndef HTMLAnchorElement_h
     25 #define HTMLAnchorElement_h
     26 
     27 #include "core/HTMLNames.h"
     28 #include "core/dom/DOMURLUtils.h"
     29 #include "core/dom/Document.h"
     30 #include "core/html/HTMLElement.h"
     31 #include "platform/LinkHash.h"
     32 
     33 namespace WebCore {
     34 
     35 // Link relation bitmask values.
     36 // FIXME: Uncomment as the various link relations are implemented.
     37 enum {
     38 //     RelationAlternate   = 0x00000001,
     39 //     RelationArchives    = 0x00000002,
     40 //     RelationAuthor      = 0x00000004,
     41 //     RelationBoomark     = 0x00000008,
     42 //     RelationExternal    = 0x00000010,
     43 //     RelationFirst       = 0x00000020,
     44 //     RelationHelp        = 0x00000040,
     45 //     RelationIndex       = 0x00000080,
     46 //     RelationLast        = 0x00000100,
     47 //     RelationLicense     = 0x00000200,
     48 //     RelationNext        = 0x00000400,
     49 //     RelationNoFolow    = 0x00000800,
     50     RelationNoReferrer     = 0x00001000,
     51 //     RelationPrev        = 0x00002000,
     52 //     RelationSearch      = 0x00004000,
     53 //     RelationSidebar     = 0x00008000,
     54 //     RelationTag         = 0x00010000,
     55 //     RelationUp          = 0x00020000,
     56 };
     57 
     58 class HTMLAnchorElement : public HTMLElement, public DOMURLUtils {
     59 public:
     60     static PassRefPtrWillBeRawPtr<HTMLAnchorElement> create(Document&);
     61 
     62     virtual ~HTMLAnchorElement();
     63 
     64     KURL href() const;
     65     void setHref(const AtomicString&);
     66 
     67     const AtomicString& name() const;
     68 
     69     virtual KURL url() const OVERRIDE FINAL;
     70     virtual void setURL(const KURL&) OVERRIDE FINAL;
     71 
     72     virtual String input() const OVERRIDE FINAL;
     73     virtual void setInput(const String&) OVERRIDE FINAL;
     74 
     75     bool isLiveLink() const;
     76 
     77     virtual bool willRespondToMouseClickEvents() OVERRIDE FINAL;
     78 
     79     bool hasRel(uint32_t relation) const;
     80     void setRel(const AtomicString&);
     81 
     82     LinkHash visitedLinkHash() const;
     83     void invalidateCachedVisitedLinkHash() { m_cachedVisitedLinkHash = 0; }
     84 
     85     virtual void trace(Visitor*) OVERRIDE;
     86 
     87 protected:
     88     HTMLAnchorElement(const QualifiedName&, Document&);
     89 
     90     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     91     virtual bool supportsFocus() const OVERRIDE;
     92 
     93 private:
     94     virtual bool isMouseFocusable() const OVERRIDE;
     95     virtual bool isKeyboardFocusable() const OVERRIDE;
     96     virtual void defaultEventHandler(Event*) OVERRIDE FINAL;
     97     virtual void setActive(bool = true) OVERRIDE FINAL;
     98     virtual void accessKeyAction(bool sendMouseEvents) OVERRIDE FINAL;
     99     virtual bool isURLAttribute(const Attribute&) const OVERRIDE FINAL;
    100     virtual bool hasLegalLinkAttribute(const QualifiedName&) const OVERRIDE FINAL;
    101     virtual bool canStartSelection() const OVERRIDE FINAL;
    102     virtual short tabIndex() const OVERRIDE FINAL;
    103     virtual bool draggable() const OVERRIDE FINAL;
    104     virtual bool isInteractiveContent() const OVERRIDE FINAL;
    105 
    106     void sendPings(const KURL& destinationURL);
    107     AtomicString target() const;
    108     void handleClick(Event*);
    109 
    110     class PrefetchEventHandler;
    111     PrefetchEventHandler* prefetchEventHandler();
    112 
    113     uint32_t m_linkRelations;
    114     OwnPtrWillBeMember<PrefetchEventHandler> m_prefetchEventHandler;
    115     mutable LinkHash m_cachedVisitedLinkHash;
    116 };
    117 
    118 inline LinkHash HTMLAnchorElement::visitedLinkHash() const
    119 {
    120     if (!m_cachedVisitedLinkHash)
    121         m_cachedVisitedLinkHash = WebCore::visitedLinkHash(document().baseURL(), fastGetAttribute(HTMLNames::hrefAttr));
    122     return m_cachedVisitedLinkHash;
    123 }
    124 
    125 // Functions shared with the other anchor elements (i.e., SVG).
    126 
    127 bool isEnterKeyKeydownEvent(Event*);
    128 bool isLinkClick(Event*);
    129 
    130 } // namespace WebCore
    131 
    132 #endif // HTMLAnchorElement_h
    133