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
|
/*
* Copyright 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006 Apple Computer, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_VALUE_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/xml/xpath_node_set.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
namespace xpath {
struct EvaluationContext;
class ValueData final : public GarbageCollected<ValueData> {
public:
ValueData() : node_set_(NodeSet::Create()) {}
explicit ValueData(const NodeSet& node_set)
: node_set_(NodeSet::Create(node_set)) {}
explicit ValueData(NodeSet* node_set) : node_set_(node_set) {}
explicit ValueData(const String& string)
: string_(string), node_set_(NodeSet::Create()) {}
void Trace(Visitor*) const;
NodeSet& GetNodeSet() { return *node_set_; }
String string_;
private:
Member<NodeSet> node_set_;
};
// Copying Value objects makes their data partially shared, so care has to be
// taken when dealing with copies.
class CORE_EXPORT Value {
DISALLOW_NEW();
public:
enum Type { kNodeSetValue, kBooleanValue, kNumberValue, kStringValue };
Value(unsigned value) : type_(kNumberValue), bool_(false), number_(value) {}
Value(uint64_t value) : type_(kNumberValue), bool_(false), number_(value) {}
Value(double value) : type_(kNumberValue), bool_(false), number_(value) {}
Value(const char* value)
: type_(kStringValue),
bool_(false),
number_(0),
data_(MakeGarbageCollected<ValueData>(value)) {}
Value(const String& value)
: type_(kStringValue),
bool_(false),
number_(0),
data_(MakeGarbageCollected<ValueData>(value)) {}
Value(const NodeSet& value)
: type_(kNodeSetValue),
bool_(false),
number_(0),
data_(MakeGarbageCollected<ValueData>(value)) {}
Value(Node* value)
: type_(kNodeSetValue),
bool_(false),
number_(0),
data_(MakeGarbageCollected<ValueData>()) {
data_->GetNodeSet().Append(value);
}
void Trace(Visitor*) const;
// This is needed to safely implement constructing from bool - with normal
// function overloading, any pointer type would match.
template <typename T>
Value(T);
static const struct AdoptTag {
} kAdopt;
Value(NodeSet* value, const AdoptTag&)
: type_(kNodeSetValue),
bool_(false),
number_(0),
data_(MakeGarbageCollected<ValueData>(value)) {}
Type GetType() const { return type_; }
bool IsNodeSet() const { return type_ == kNodeSetValue; }
bool IsBoolean() const { return type_ == kBooleanValue; }
bool IsNumber() const { return type_ == kNumberValue; }
bool IsString() const { return type_ == kStringValue; }
// If this is called during XPathExpression::evaluate(), EvaluationContext
// should be passed to record type conversion error.
const NodeSet& ToNodeSet(EvaluationContext*) const;
NodeSet& ModifiableNodeSet(EvaluationContext&);
bool ToBoolean() const;
double ToNumber() const;
String ToString() const;
private:
Type type_;
bool bool_;
double number_;
Member<ValueData> data_;
};
template <>
inline Value::Value(bool value)
: type_(kBooleanValue), bool_(value), number_(0) {}
} // namespace xpath
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_VALUE_H_
|
