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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2006-2007, 2013-2014 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 LiveNodeList_h
#define LiveNodeList_h
#include "CollectionIndexCache.h"
#include "CollectionTraversal.h"
#include "CollectionType.h"
#include "Document.h"
#include "ElementDescendantIterator.h"
#include "HTMLNames.h"
#include "NodeList.h"
#include <wtf/Forward.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class Element;
static bool shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType, const QualifiedName&);
class LiveNodeList : public NodeList {
public:
LiveNodeList(ContainerNode& ownerNode, NodeListInvalidationType);
virtual ~LiveNodeList();
virtual bool elementMatches(Element&) const = 0;
virtual bool isRootedAtDocument() const = 0;
ALWAYS_INLINE NodeListInvalidationType invalidationType() const { return static_cast<NodeListInvalidationType>(m_invalidationType); }
ContainerNode& ownerNode() const { return const_cast<ContainerNode&>(m_ownerNode.get()); }
ALWAYS_INLINE void invalidateCacheForAttribute(const QualifiedName* attrName) const
{
if (!attrName || shouldInvalidateTypeOnAttributeChange(invalidationType(), *attrName))
invalidateCache(document());
}
virtual void invalidateCache(Document&) const = 0;
bool isRegisteredForInvalidationAtDocument() const { return m_isRegisteredForInvalidationAtDocument; }
void setRegisteredForInvalidationAtDocument(bool f) { m_isRegisteredForInvalidationAtDocument = f; }
protected:
Document& document() const { return m_ownerNode->document(); }
private:
virtual bool isLiveNodeList() const override final { return true; }
ContainerNode& rootNode() const;
Ref<ContainerNode> m_ownerNode;
const unsigned m_invalidationType;
bool m_isRegisteredForInvalidationAtDocument;
};
template <class NodeListType>
class CachedLiveNodeList : public LiveNodeList {
public:
virtual ~CachedLiveNodeList();
unsigned length() const override final { return m_indexCache.nodeCount(nodeList()); }
Element* item(unsigned offset) const override { return m_indexCache.nodeAt(nodeList(), offset); }
// For CollectionIndexCache
ElementDescendantIterator collectionBegin() const { return CollectionTraversal<CollectionTraversalType::Descendants>::begin(nodeList(), rootNode()); }
ElementDescendantIterator collectionLast() const { return CollectionTraversal<CollectionTraversalType::Descendants>::last(nodeList(), rootNode()); }
ElementDescendantIterator collectionEnd() const { return ElementDescendantIterator(); }
void collectionTraverseForward(ElementDescendantIterator& current, unsigned count, unsigned& traversedCount) const { CollectionTraversal<CollectionTraversalType::Descendants>::traverseForward(nodeList(), current, count, traversedCount); }
void collectionTraverseBackward(ElementDescendantIterator& current, unsigned count) const { CollectionTraversal<CollectionTraversalType::Descendants>::traverseBackward(nodeList(), current, count); }
bool collectionCanTraverseBackward() const { return true; }
void willValidateIndexCache() const { document().registerNodeListForInvalidation(const_cast<CachedLiveNodeList<NodeListType>&>(*this)); }
virtual void invalidateCache(Document&) const override final;
virtual size_t memoryCost() const override final { return m_indexCache.memoryCost(); }
protected:
CachedLiveNodeList(ContainerNode& rootNode, NodeListInvalidationType);
private:
NodeListType& nodeList() { return static_cast<NodeListType&>(*this); }
const NodeListType& nodeList() const { return static_cast<const NodeListType&>(*this); }
ContainerNode& rootNode() const;
mutable CollectionIndexCache<NodeListType, ElementDescendantIterator> m_indexCache;
};
ALWAYS_INLINE bool shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType type, const QualifiedName& attrName)
{
switch (type) {
case InvalidateOnClassAttrChange:
return attrName == HTMLNames::classAttr;
case InvalidateOnNameAttrChange:
return attrName == HTMLNames::nameAttr;
case InvalidateOnIdNameAttrChange:
return attrName == HTMLNames::idAttr || attrName == HTMLNames::nameAttr;
case InvalidateOnForAttrChange:
return attrName == HTMLNames::forAttr;
case InvalidateForFormControls:
return attrName == HTMLNames::nameAttr || attrName == HTMLNames::idAttr || attrName == HTMLNames::forAttr
|| attrName == HTMLNames::formAttr || attrName == HTMLNames::typeAttr;
case InvalidateOnHRefAttrChange:
return attrName == HTMLNames::hrefAttr;
case DoNotInvalidateOnAttributeChanges:
return false;
case InvalidateOnAnyAttrChange:
return true;
}
return false;
}
template <class NodeListType>
CachedLiveNodeList<NodeListType>::CachedLiveNodeList(ContainerNode& ownerNode, NodeListInvalidationType invalidationType)
: LiveNodeList(ownerNode, invalidationType)
, m_indexCache(nodeList())
{
}
template <class NodeListType>
CachedLiveNodeList<NodeListType>::~CachedLiveNodeList()
{
if (m_indexCache.hasValidCache(nodeList()))
document().unregisterNodeListForInvalidation(*this);
}
template <class NodeListType>
inline ContainerNode& CachedLiveNodeList<NodeListType>::rootNode() const
{
if (nodeList().isRootedAtDocument() && ownerNode().inDocument())
return ownerNode().document();
return ownerNode();
}
template <class NodeListType>
void CachedLiveNodeList<NodeListType>::invalidateCache(Document& document) const
{
if (!m_indexCache.hasValidCache(nodeList()))
return;
document.unregisterNodeListForInvalidation(const_cast<NodeListType&>(nodeList()));
m_indexCache.invalidate(nodeList());
}
} // namespace WebCore
#endif // LiveNodeList_h
|
