1/*
2 * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
3 * Copyright (C) 2006, 2009 Apple Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef XPathPath_h
28#define XPathPath_h
29
30#include "core/xml/XPathExpressionNode.h"
31#include "core/xml/XPathNodeSet.h"
32
33namespace blink {
34
35namespace XPath {
36
37class Predicate;
38class Step;
39
40class Filter FINAL : public Expression {
41public:
42    Filter(PassOwnPtrWillBeRawPtr<Expression>, WillBeHeapVector<OwnPtrWillBeMember<Predicate> >&);
43    virtual ~Filter();
44    virtual void trace(Visitor*) OVERRIDE;
45
46    virtual Value evaluate(EvaluationContext&) const OVERRIDE;
47
48private:
49    virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
50
51    OwnPtrWillBeMember<Expression> m_expr;
52    WillBeHeapVector<OwnPtrWillBeMember<Predicate> > m_predicates;
53};
54
55class LocationPath FINAL : public Expression {
56public:
57    LocationPath();
58    virtual ~LocationPath();
59    virtual void trace(Visitor*) OVERRIDE;
60
61    virtual Value evaluate(EvaluationContext&) const OVERRIDE;
62    void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
63    void evaluate(EvaluationContext&, NodeSet&) const; // nodes is an input/output parameter
64    void appendStep(Step*);
65    void insertFirstStep(Step*);
66
67private:
68    virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
69
70    WillBeHeapVector<RawPtrWillBeMember<Step> > m_steps;
71    bool m_absolute;
72};
73
74class Path FINAL : public Expression {
75public:
76    Path(Expression*, LocationPath*);
77    virtual ~Path();
78    virtual void trace(Visitor*) OVERRIDE;
79
80    virtual Value evaluate(EvaluationContext&) const OVERRIDE;
81
82private:
83    virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
84
85    OwnPtrWillBeMember<Expression> m_filter;
86    OwnPtrWillBeMember<LocationPath> m_path;
87};
88
89}
90
91}
92#endif // XPathPath_h
93