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
|
/*
* 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, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2014 Samsung Electronics. 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 NodeTraversal_h
#define NodeTraversal_h
#include "core/dom/Node.h"
namespace WebCore {
class NodeTraversal {
public:
// Does a pre-order traversal of the tree to find the next node after this one.
// This uses the same order that tags appear in the source file. If the stayWithin
// argument is non-null, the traversal will stop once the specified node is reached.
// This can be used to restrict traversal to a particular sub-tree.
static Node* next(const Node& current) { return traverseNextTemplate(current); }
static Node* next(const ContainerNode& current) { return traverseNextTemplate(current); }
static Node* next(const Node& current, const Node* stayWithin) { return traverseNextTemplate(current, stayWithin); }
static Node* next(const ContainerNode& current, const Node* stayWithin) { return traverseNextTemplate(current, stayWithin); }
// Like next, but skips children and starts with the next sibling.
static Node* nextSkippingChildren(const Node& current) { return traverseNextSkippingChildrenTemplate(current); }
static Node* nextSkippingChildren(const ContainerNode& current) { return traverseNextSkippingChildrenTemplate(current); }
static Node* nextSkippingChildren(const Node& current, const Node* stayWithin) { return traverseNextSkippingChildrenTemplate(current, stayWithin); }
static Node* nextSkippingChildren(const ContainerNode& current, const Node* stayWithin) { return traverseNextSkippingChildrenTemplate(current, stayWithin); }
// Does a reverse pre-order traversal to find the node that comes before the current one in document order
static Node* lastWithin(const ContainerNode&);
static Node* previous(const Node&, const Node* stayWithin = 0);
// Like previous, but skips children and starts with the next sibling.
static Node* previousSkippingChildren(const Node&, const Node* stayWithin = 0);
// Like next, but visits parents after their children.
static Node* nextPostOrder(const Node&, const Node* stayWithin = 0);
// Like previous, but visits parents before their children.
static Node* previousPostOrder(const Node&, const Node* stayWithin = 0);
// Pre-order traversal including the pseudo-elements.
static Node* previousIncludingPseudo(const Node&, const Node* stayWithin = 0);
static Node* nextIncludingPseudo(const Node&, const Node* stayWithin = 0);
static Node* nextIncludingPseudoSkippingChildren(const Node&, const Node* stayWithin = 0);
static Node* nextAncestorSibling(const Node&);
static Node* nextAncestorSibling(const Node&, const Node* stayWithin);
private:
template <class NodeType>
static Node* traverseNextTemplate(NodeType&);
template <class NodeType>
static Node* traverseNextTemplate(NodeType&, const Node* stayWithin);
template <class NodeType>
static Node* traverseNextSkippingChildrenTemplate(NodeType&);
template <class NodeType>
static Node* traverseNextSkippingChildrenTemplate(NodeType&, const Node* stayWithin);
};
template <class NodeType>
inline Node* NodeTraversal::traverseNextTemplate(NodeType& current)
{
if (current.firstChild())
return current.firstChild();
if (current.nextSibling())
return current.nextSibling();
return nextAncestorSibling(current);
}
template <class NodeType>
inline Node* NodeTraversal::traverseNextTemplate(NodeType& current, const Node* stayWithin)
{
if (current.firstChild())
return current.firstChild();
if (current == stayWithin)
return 0;
if (current.nextSibling())
return current.nextSibling();
return nextAncestorSibling(current, stayWithin);
}
template <class NodeType>
inline Node* NodeTraversal::traverseNextSkippingChildrenTemplate(NodeType& current)
{
if (current.nextSibling())
return current.nextSibling();
return nextAncestorSibling(current);
}
template <class NodeType>
inline Node* NodeTraversal::traverseNextSkippingChildrenTemplate(NodeType& current, const Node* stayWithin)
{
if (current == stayWithin)
return 0;
if (current.nextSibling())
return current.nextSibling();
return nextAncestorSibling(current, stayWithin);
}
} // namespace WebCore
#endif
|
