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 "XPathExpressionNode.h"
31#include "XPathNodeSet.h"
32
33namespace WebCore {
34
35    namespace XPath {
36
37        class Predicate;
38        class Step;
39
40        class Filter : public Expression {
41        public:
42            Filter(Expression*, const Vector<Predicate*>& = Vector<Predicate*>());
43            virtual ~Filter();
44
45            virtual Value evaluate() const;
46
47        private:
48            virtual Value::Type resultType() const { return Value::NodeSetValue; }
49
50            Expression* m_expr;
51            Vector<Predicate*> m_predicates;
52        };
53
54        class LocationPath : public Expression {
55        public:
56            LocationPath();
57            virtual ~LocationPath();
58            void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
59
60            virtual Value evaluate() const;
61            void evaluate(NodeSet& nodes) const; // nodes is an input/output parameter
62
63            void appendStep(Step* step);
64            void insertFirstStep(Step* step);
65
66        private:
67            virtual Value::Type resultType() const { return Value::NodeSetValue; }
68
69            Vector<Step*> m_steps;
70            bool m_absolute;
71        };
72
73        class Path : public Expression {
74        public:
75            Path(Filter*, LocationPath*);
76            virtual ~Path();
77
78            virtual Value evaluate() const;
79
80        private:
81            virtual Value::Type resultType() const { return Value::NodeSetValue; }
82
83            Filter* m_filter;
84            LocationPath* m_path;
85        };
86
87    }
88}
89
90#endif // XPath_Path_H
91