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
|
/*
* 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_PREDICATE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PREDICATE_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/xml/xpath_expression_node.h"
#include "third_party/blink/renderer/core/xml/xpath_value.h"
namespace blink {
namespace xpath {
class CORE_EXPORT Number final : public Expression {
public:
explicit Number(double);
void Trace(Visitor*) const override;
private:
Value Evaluate(EvaluationContext&) const override;
Value::Type ResultType() const override { return Value::kNumberValue; }
Value value_;
};
class CORE_EXPORT StringExpression final : public Expression {
public:
explicit StringExpression(const String&);
void Trace(Visitor*) const override;
private:
Value Evaluate(EvaluationContext&) const override;
Value::Type ResultType() const override { return Value::kStringValue; }
Value value_;
};
class Negative final : public Expression {
private:
Value Evaluate(EvaluationContext&) const override;
Value::Type ResultType() const override { return Value::kNumberValue; }
};
class NumericOp final : public Expression {
public:
enum Opcode { kOP_Add, kOP_Sub, kOP_Mul, kOP_Div, kOP_Mod };
NumericOp(Opcode, Expression* lhs, Expression* rhs);
private:
Value Evaluate(EvaluationContext&) const override;
Value::Type ResultType() const override { return Value::kNumberValue; }
Opcode opcode_;
};
class EqTestOp final : public Expression {
public:
enum Opcode {
kOpcodeEqual,
kOpcodeNotEqual,
kOpcodeGreaterThan,
kOpcodeLessThan,
kOpcodeGreaterOrEqual,
kOpcodeLessOrEqual
};
EqTestOp(Opcode, Expression* lhs, Expression* rhs);
Value Evaluate(EvaluationContext&) const override;
private:
Value::Type ResultType() const override { return Value::kBooleanValue; }
bool Compare(EvaluationContext&, const Value&, const Value&) const;
Opcode opcode_;
};
class LogicalOp final : public Expression {
public:
enum Opcode { kOP_And, kOP_Or };
LogicalOp(Opcode, Expression* lhs, Expression* rhs);
private:
Value::Type ResultType() const override { return Value::kBooleanValue; }
bool ShortCircuitOn() const;
Value Evaluate(EvaluationContext&) const override;
Opcode opcode_;
};
class Union final : public Expression {
private:
Value Evaluate(EvaluationContext&) const override;
Value::Type ResultType() const override { return Value::kNodeSetValue; }
};
class Predicate final : public GarbageCollected<Predicate> {
public:
explicit Predicate(Expression*);
Predicate(const Predicate&) = delete;
Predicate& operator=(const Predicate&) = delete;
void Trace(Visitor*) const;
bool Evaluate(EvaluationContext&) const;
bool IsContextPositionSensitive() const {
return expr_->IsContextPositionSensitive() ||
expr_->ResultType() == Value::kNumberValue;
}
bool IsContextSizeSensitive() const {
return expr_->IsContextSizeSensitive();
}
private:
Member<Expression> expr_;
};
} // namespace xpath
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_XML_XPATH_PREDICATE_H_
|
