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 

    35 namespace 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