1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Simon Hausmann <hausmann@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 "HTMLNames.h"
28 #include "core/dom/DOMURLUtils.h"
29 #include "core/html/HTMLElement.h"
30 #include "platform/LinkHash.h"
31
32 namespace WebCore {
33
34 // Link relation bitmask values.
35 // FIXME: Uncomment as the various link relations are implemented.
36 enum {
37 // RelationAlternate = 0x00000001,
38 // RelationArchives = 0x00000002,
39 // RelationAuthor = 0x00000004,
40 // RelationBoomark = 0x00000008,
41 // RelationExternal = 0x00000010,
42 // RelationFirst = 0x00000020,
43 // RelationHelp = 0x00000040,
44 // RelationIndex = 0x00000080,
45 // RelationLast = 0x00000100,
46 // RelationLicense = 0x00000200,
47 // RelationNext = 0x00000400,
48 // RelationNoFolow = 0x00000800,
49 RelationNoReferrer = 0x00001000,
50 // RelationPrev = 0x00002000,
51 // RelationSearch = 0x00004000,
52 // RelationSidebar = 0x00008000,
53 // RelationTag = 0x00010000,
54 // RelationUp = 0x00020000,
55 };
56
57 class HTMLAnchorElement : public HTMLElement, public DOMURLUtils {
58 public:
59 static PassRefPtr<HTMLAnchorElement> create(Document&);
60 static PassRefPtr<HTMLAnchorElement> create(const QualifiedName&, 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;
70 virtual void setURL(const KURL&) OVERRIDE;
71
72 virtual String input() const OVERRIDE;
73 virtual void setInput(const String&) OVERRIDE;
74
75 String text();
76
77 bool isLiveLink() const;
78
79 virtual bool willRespondToMouseClickEvents() OVERRIDE;
80
81 bool hasRel(uint32_t relation) const;
82 void setRel(const String&);
83
84 LinkHash visitedLinkHash() const;
invalidateCachedVisitedLinkHash()85 void invalidateCachedVisitedLinkHash() { m_cachedVisitedLinkHash = 0; }
86
87 protected:
88 HTMLAnchorElement(const QualifiedName&, Document&);
89
90 virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
91
92 private:
93 virtual bool supportsFocus() const;
94 virtual bool isMouseFocusable() const;
95 virtual bool isKeyboardFocusable() const OVERRIDE;
96 virtual void defaultEventHandler(Event*);
97 virtual void setActive(bool = true) OVERRIDE FINAL;
98 virtual void accessKeyAction(bool sendMouseEvents);
99 virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
100 virtual bool canStartSelection() const;
101 virtual String target() const;
102 virtual short tabIndex() const;
103 virtual bool draggable() const;
104 virtual bool isInteractiveContent() const OVERRIDE;
105
106 void sendPings(const KURL& destinationURL);
107
108 void handleClick(Event*);
109
110 enum EventType {
111 MouseEventWithoutShiftKey,
112 MouseEventWithShiftKey,
113 NonMouseEvent,
114 };
115 static EventType eventType(Event*);
116 bool treatLinkAsLiveForEventType(EventType) const;
117
118 Element* rootEditableElementForSelectionOnMouseDown() const;
119 void setRootEditableElementForSelectionOnMouseDown(Element*);
120 void clearRootEditableElementForSelectionOnMouseDown();
121
122 class PrefetchEventHandler;
123 PrefetchEventHandler* prefetchEventHandler();
124
125 bool m_hasRootEditableElementForSelectionOnMouseDown : 1;
126 bool m_wasShiftKeyDownOnMouseDown : 1;
127 uint32_t m_linkRelations : 30;
128 OwnPtr<PrefetchEventHandler> m_prefetchEventHandler;
129 mutable LinkHash m_cachedVisitedLinkHash;
130 };
131
visitedLinkHash()132 inline LinkHash HTMLAnchorElement::visitedLinkHash() const
133 {
134 if (!m_cachedVisitedLinkHash)
135 m_cachedVisitedLinkHash = WebCore::visitedLinkHash(document().baseURL(), fastGetAttribute(HTMLNames::hrefAttr));
136 return m_cachedVisitedLinkHash;
137 }
138
139 // Functions shared with the other anchor elements (i.e., SVG).
140
141 bool isEnterKeyKeydownEvent(Event*);
142 bool isLinkClick(Event*);
143
isHTMLAnchorElement(const Node * node)144 inline bool isHTMLAnchorElement(const Node* node)
145 {
146 return node->hasTagName(HTMLNames::aTag);
147 }
148
isHTMLAnchorElement(const Element * element)149 inline bool isHTMLAnchorElement(const Element* element)
150 {
151 return element->hasTagName(HTMLNames::aTag);
152 }
153
isHTMLAnchorElement(const Element & element)154 inline bool isHTMLAnchorElement(const Element& element)
155 {
156 return element.hasTagName(HTMLNames::aTag);
157 }
158
159 DEFINE_NODE_TYPE_CASTS(HTMLAnchorElement, hasTagName(HTMLNames::aTag));
160
161 } // namespace WebCore
162
163 #endif // HTMLAnchorElement_h
164