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      1 /*
      2  * Copyright (C) 2005 Frerich Raabe <raabe (at) 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 
     33 namespace WebCore {
     34 
     35 namespace XPath {
     36 
     37 class Predicate;
     38 class Step;
     39 
     40 class Filter FINAL : public Expression {
     41 public:
     42     Filter(PassOwnPtrWillBeRawPtr<Expression>, WillBeHeapVector<OwnPtrWillBeMember<Predicate> >&);
     43     virtual ~Filter();
     44     virtual void trace(Visitor*) OVERRIDE;
     45 
     46     virtual Value evaluate() const OVERRIDE;
     47 
     48 private:
     49     virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
     50 
     51     OwnPtrWillBeMember<Expression> m_expr;
     52     WillBeHeapVector<OwnPtrWillBeMember<Predicate> > m_predicates;
     53 };
     54 
     55 class LocationPath FINAL : public Expression {
     56 public:
     57     LocationPath();
     58     virtual ~LocationPath();
     59     virtual void trace(Visitor*) OVERRIDE;
     60 
     61     virtual Value evaluate() const OVERRIDE;
     62     void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
     63     void evaluate(NodeSet&) const; // nodes is an input/output parameter
     64     void appendStep(Step*);
     65     void insertFirstStep(Step*);
     66 
     67 private:
     68     virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
     69 
     70     WillBeHeapVector<RawPtrWillBeMember<Step> > m_steps;
     71     bool m_absolute;
     72 };
     73 
     74 class Path FINAL : public Expression {
     75 public:
     76     Path(Expression*, LocationPath*);
     77     virtual ~Path();
     78     virtual void trace(Visitor*) OVERRIDE;
     79 
     80     virtual Value evaluate() const OVERRIDE;
     81 
     82 private:
     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