1 /*

     2  * This file is part of the DOM implementation for KDE.

     3  *

     4  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

     5  * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)

     6  * Copyright (C) 2001 Peter Kelly (pmk@post.com)

     7  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)

     8  * Copyright (C) 2004 Apple Computer, Inc.

     9  *

    10  * This library is free software; you can redistribute it and/or

    11  * modify it under the terms of the GNU Library General Public

    12  * License as published by the Free Software Foundation; either

    13  * version 2 of the License, or (at your option) any later version.

    14  *

    15  * This library is distributed in the hope that it will be useful,

    16  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    18  * Library General Public License for more details.

    19  *

    20  * You should have received a copy of the GNU Library General Public License

    21  * along with this library; see the file COPYING.LIB.  If not, write to

    22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    23  * Boston, MA 02110-1301, USA.

    24  *

    25  */

    26 

    27 #ifndef TreeWalker_h

    28 #define TreeWalker_h

    29 

    30 #include "Traversal.h"

    31 #include <wtf/RefPtr.h>

    32 

    33 namespace WebCore {

    34 

    35     typedef int ExceptionCode;

    36 

    37     class TreeWalker : public Traversal {

    38     public:

    39         TreeWalker(Node*, unsigned whatToShow, PassRefPtr<NodeFilter>, bool expandEntityReferences);

    40 

    41         Node* currentNode() const { return m_current.get(); }

    42         void setCurrentNode(Node*, ExceptionCode&);

    43 

    44         Node* parentNode();

    45         Node* firstChild();

    46         Node* lastChild();

    47         Node* previousSibling();

    48         Node* nextSibling();

    49         Node* previousNode();

    50         Node* nextNode();

    51 

    52     private:

    53         // convenience for when it is known there will be no exception

    54         void setCurrentNode(Node*);

    55         bool ancestorRejected(const Node*) const;

    56 

    57         RefPtr<Node> m_current;

    58     };

    59 

    60 } // namespace WebCore

    61 

    62 #endif // TreeWalker_h