1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef HTMLCollection_h
#define HTMLCollection_h
#include "core/dom/LiveNodeList.h"
#include "core/html/CollectionType.h"
#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
namespace WebCore {
class HTMLCollection : public LiveNodeListBase {
public:
static PassRefPtr<HTMLCollection> create(Node* base, CollectionType);
virtual ~HTMLCollection();
// DOM API
virtual Node* namedItem(const AtomicString& name) const;
// Non-DOM API
virtual bool hasNamedItem(const AtomicString& name) const;
void namedItems(const AtomicString& name, Vector<RefPtr<Node> >&) const;
bool isEmpty() const
{
if (isLengthCacheValid())
return !cachedLength();
if (isItemCacheValid())
return !cachedItem();
return !item(0);
}
bool hasExactlyOneItem() const
{
if (isLengthCacheValid())
return cachedLength() == 1;
if (isItemCacheValid())
return cachedItem() && !cachedItemOffset() && !item(1);
return item(0) && !item(1);
}
virtual Element* virtualItemAfter(unsigned& offsetInArray, Element*) const;
Element* traverseFirstElement(unsigned& offsetInArray, ContainerNode& root) const;
Element* traverseForwardToOffset(unsigned offset, Element& currentElement, unsigned& currentOffset, unsigned& offsetInArray, ContainerNode* root) const;
protected:
HTMLCollection(Node* base, CollectionType, ItemAfterOverrideType);
virtual void updateNameCache() const;
typedef HashMap<StringImpl*, OwnPtr<Vector<Element*> > > NodeCacheMap;
Vector<Element*>* idCache(const AtomicString& name) const { return m_idCache.get(name.impl()); }
Vector<Element*>* nameCache(const AtomicString& name) const { return m_nameCache.get(name.impl()); }
void appendIdCache(const AtomicString& name, Element* element) const { append(m_idCache, name, element); }
void appendNameCache(const AtomicString& name, Element* element) const { append(m_nameCache, name, element); }
private:
bool checkForNameMatch(Element*, bool checkName, const AtomicString& name) const;
Element* traverseNextElement(unsigned& offsetInArray, Element& previous, ContainerNode* root) const;
virtual bool isLiveNodeList() const OVERRIDE { ASSERT_NOT_REACHED(); return true; }
static void append(NodeCacheMap&, const AtomicString&, Element*);
mutable NodeCacheMap m_idCache;
mutable NodeCacheMap m_nameCache;
mutable unsigned m_cachedElementsArrayOffset;
friend class LiveNodeListBase;
};
} // namespace
#endif
|
