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#if ENABLE(XPATH)
31
32#include "XPathExpressionNode.h"
33#include "XPathNodeSet.h"
34
35namespace WebCore {
36
37    namespace XPath {
38
39        class Predicate;
40        class Step;
41
42        class Filter : public Expression {
43        public:
44            Filter(Expression*, const Vector<Predicate*>& = Vector<Predicate*>());
45            virtual ~Filter();
46
47            virtual Value evaluate() const;
48
49        private:
50            virtual Value::Type resultType() const { return Value::NodeSetValue; }
51
52            Expression* m_expr;
53            Vector<Predicate*> m_predicates;
54        };
55
56        class LocationPath : public Expression {
57        public:
58            LocationPath();
59            virtual ~LocationPath();
60            void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
61
62            virtual Value evaluate() const;
63            void evaluate(NodeSet& nodes) const; // nodes is an input/output parameter
64
65            void appendStep(Step* step);
66            void insertFirstStep(Step* step);
67
68        private:
69            virtual Value::Type resultType() const { return Value::NodeSetValue; }
70
71            Vector<Step*> m_steps;
72            bool m_absolute;
73        };
74
75        class Path : public Expression {
76        public:
77            Path(Filter*, LocationPath*);
78            virtual ~Path();
79
80            virtual Value evaluate() const;
81
82        private:
83            virtual Value::Type resultType() const { return Value::NodeSetValue; }
84
85            Filter* m_filter;
86            LocationPath* m_path;
87        };
88
89    }
90}
91
92#endif // ENABLE(XPATH)
93
94#endif // XPath_Path_H
95