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1 /* | 1 /* |
2 * Copyright (C) 2005 Frerich Raabe <raabe@kde.org> | 2 * Copyright (C) 2005 Frerich Raabe <raabe@kde.org> |
3 * Copyright (C) 2006, 2009 Apple Inc. | 3 * Copyright (C) 2006, 2009 Apple Inc. |
4 * | 4 * |
5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
7 * are met: | 7 * are met: |
8 * | 8 * |
9 * 1. Redistributions of source code must retain the above copyright | 9 * 1. Redistributions of source code must retain the above copyright |
10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
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28 #define XPathExpressionNode_h | 28 #define XPathExpressionNode_h |
29 | 29 |
30 #include "core/dom/Node.h" | 30 #include "core/dom/Node.h" |
31 #include "core/xml/XPathValue.h" | 31 #include "core/xml/XPathValue.h" |
32 #include "wtf/HashMap.h" | 32 #include "wtf/HashMap.h" |
33 #include "wtf/Vector.h" | 33 #include "wtf/Vector.h" |
34 #include "wtf/text/StringHash.h" | 34 #include "wtf/text/StringHash.h" |
35 | 35 |
36 namespace WebCore { | 36 namespace WebCore { |
37 | 37 |
38 namespace XPath { | 38 namespace XPath { |
39 | 39 |
40 struct EvaluationContext { | 40 struct EvaluationContext { |
41 WTF_MAKE_FAST_ALLOCATED; | 41 WTF_MAKE_FAST_ALLOCATED; |
42 public: | 42 public: |
43 RefPtrWillBePersistent<Node> node; | 43 RefPtrWillBePersistent<Node> node; |
44 unsigned long size; | 44 unsigned long size; |
45 unsigned long position; | 45 unsigned long position; |
46 HashMap<String, String> variableBindings; | 46 HashMap<String, String> variableBindings; |
47 | 47 |
48 bool hadTypeConversionError; | 48 bool hadTypeConversionError; |
49 }; | 49 }; |
50 | 50 |
51 class ParseNode : public NoBaseWillBeGarbageCollectedFinalized<ParseNode
> { | 51 class ParseNode : public NoBaseWillBeGarbageCollectedFinalized<ParseNode> { |
52 public: | 52 public: |
53 virtual ~ParseNode() { } | 53 virtual ~ParseNode() { } |
54 virtual void trace(Visitor*) { } | 54 virtual void trace(Visitor*) { } |
55 }; | 55 }; |
56 | 56 |
57 class Expression : public ParseNode { | 57 class Expression : public ParseNode { |
58 WTF_MAKE_NONCOPYABLE(Expression); WTF_MAKE_FAST_ALLOCATED_WILL_BE_RE
MOVED; | 58 WTF_MAKE_NONCOPYABLE(Expression); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; |
59 public: | 59 public: |
60 static EvaluationContext& evaluationContext(); | 60 static EvaluationContext& evaluationContext(); |
61 | 61 |
62 Expression(); | 62 Expression(); |
63 virtual ~Expression(); | 63 virtual ~Expression(); |
64 virtual void trace(Visitor*) OVERRIDE; | 64 virtual void trace(Visitor*) OVERRIDE; |
65 | 65 |
66 virtual Value evaluate() const = 0; | 66 virtual Value evaluate() const = 0; |
67 | 67 |
68 void addSubExpression(PassOwnPtrWillBeRawPtr<Expression> expr) | 68 void addSubExpression(PassOwnPtrWillBeRawPtr<Expression> expr) |
69 { | 69 { |
70 m_isContextNodeSensitive |= expr->m_isContextNodeSensitive; | 70 m_isContextNodeSensitive |= expr->m_isContextNodeSensitive; |
71 m_isContextPositionSensitive |= expr->m_isContextPositionSensiti
ve; | 71 m_isContextPositionSensitive |= expr->m_isContextPositionSensitive; |
72 m_isContextSizeSensitive |= expr->m_isContextSizeSensitive; | 72 m_isContextSizeSensitive |= expr->m_isContextSizeSensitive; |
73 m_subExpressions.append(expr); | 73 m_subExpressions.append(expr); |
74 } | 74 } |
75 | 75 |
76 bool isContextNodeSensitive() const { return m_isContextNodeSensitiv
e; } | 76 bool isContextNodeSensitive() const { return m_isContextNodeSensitive; } |
77 bool isContextPositionSensitive() const { return m_isContextPosition
Sensitive; } | 77 bool isContextPositionSensitive() const { return m_isContextPositionSensitiv
e; } |
78 bool isContextSizeSensitive() const { return m_isContextSizeSensitiv
e; } | 78 bool isContextSizeSensitive() const { return m_isContextSizeSensitive; } |
79 void setIsContextNodeSensitive(bool value) { m_isContextNodeSensitiv
e = value; } | 79 void setIsContextNodeSensitive(bool value) { m_isContextNodeSensitive = valu
e; } |
80 void setIsContextPositionSensitive(bool value) { m_isContextPosition
Sensitive = value; } | 80 void setIsContextPositionSensitive(bool value) { m_isContextPositionSensitiv
e = value; } |
81 void setIsContextSizeSensitive(bool value) { m_isContextSizeSensitiv
e = value; } | 81 void setIsContextSizeSensitive(bool value) { m_isContextSizeSensitive = valu
e; } |
82 | 82 |
83 virtual Value::Type resultType() const = 0; | 83 virtual Value::Type resultType() const = 0; |
84 | 84 |
85 protected: | 85 protected: |
86 unsigned subExprCount() const { return m_subExpressions.size(); } | 86 unsigned subExprCount() const { return m_subExpressions.size(); } |
87 Expression* subExpr(unsigned i) { return m_subExpressions[i].get();
} | 87 Expression* subExpr(unsigned i) { return m_subExpressions[i].get(); } |
88 const Expression* subExpr(unsigned i) const { return m_subExpression
s[i].get(); } | 88 const Expression* subExpr(unsigned i) const { return m_subExpressions[i].get
(); } |
89 | 89 |
90 private: | 90 private: |
91 WillBeHeapVector<OwnPtrWillBeMember<Expression> > m_subExpressions; | 91 WillBeHeapVector<OwnPtrWillBeMember<Expression> > m_subExpressions; |
92 | 92 |
93 // Evaluation details that can be used for optimization. | 93 // Evaluation details that can be used for optimization. |
94 bool m_isContextNodeSensitive; | 94 bool m_isContextNodeSensitive; |
95 bool m_isContextPositionSensitive; | 95 bool m_isContextPositionSensitive; |
96 bool m_isContextSizeSensitive; | 96 bool m_isContextSizeSensitive; |
97 }; | 97 }; |
98 | |
99 } | |
100 | 98 |
101 } | 99 } |
102 | 100 |
103 #endif // EXPRESSION_H | 101 } |
| 102 |
| 103 #endif // XPathExpressionNode_h |
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