dom2_traversal.h

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/*
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright 1999 Lars Knoll (knoll@kde.org)
 * Copyright 2000 Frederik Holljen (frederik.holljen@hig.no)
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * This file includes excerpts from the Document Object Model (DOM)
 * Level 2 Specification (Candidate Recommendation)
 * http://www.w3.org/TR/2000/CR-DOM-Level-2-20000510/
 * Copyright © 2000 W3C® (MIT, INRIA, Keio), All Rights Reserved.
 *
 */
#ifndef _dom2_traversal_h_
#define _dom2_traversal_h_

#include <khtml_export.h>
#include <dom/dom_node.h>
#include <dom/dom_misc.h>

namespace DOM {
class Node;
class NodeFilter;
class NodeIteratorImpl;
class NodeFilterImpl;
class TreeWalkerImpl;
class CustomNodeFilter;
class CustomNodeFilterImpl;

class KHTML_EXPORT NodeIterator
{
    friend class NodeIteratorImpl;
    friend class Document;
public:
    NodeIterator();
    NodeIterator(const NodeIterator &other);

    NodeIterator & operator = (const NodeIterator &other);

    ~NodeIterator();

    Node root();

    unsigned long whatToShow();

    NodeFilter filter();

    bool expandEntityReferences();

    Node nextNode();

    Node previousNode();

    void detach();

    NodeIteratorImpl *handle() const;
    bool isNull() const;

protected:
    NodeIteratorImpl *impl;
    NodeIterator(NodeIteratorImpl *i);
};


class KHTML_EXPORT NodeFilter
{
    friend class NodeIterator;
    friend class NodeIteratorImpl;
    friend class TreeWalker;
    friend class TreeWalkerImpl;
    friend class NodeFilterImpl;
public:
    NodeFilter();
    NodeFilter(const NodeFilter &other);
    NodeFilter(NodeFilterImpl *i);

    virtual NodeFilter & operator = (const NodeFilter &other);

    virtual ~NodeFilter();
    enum AcceptCode {
        FILTER_ACCEPT = 1,
        FILTER_REJECT = 2,
        FILTER_SKIP   = 3
    };

    enum ShowCode {
        SHOW_ALL                       = 0xFFFFFFFF,
        SHOW_ELEMENT                   = 0x00000001,
        SHOW_ATTRIBUTE                 = 0x00000002,
        SHOW_TEXT                      = 0x00000004,
        SHOW_CDATA_SECTION             = 0x00000008,
        SHOW_ENTITY_REFERENCE          = 0x00000010,
        SHOW_ENTITY                    = 0x00000020,
        SHOW_PROCESSING_INSTRUCTION    = 0x00000040,
        SHOW_COMMENT                   = 0x00000080,
        SHOW_DOCUMENT                  = 0x00000100,
        SHOW_DOCUMENT_TYPE             = 0x00000200,
        SHOW_DOCUMENT_FRAGMENT         = 0x00000400,
        SHOW_NOTATION                  = 0x00000800
    };

    virtual short acceptNode (const Node &n);

    virtual NodeFilterImpl *handle() const;
    virtual bool isNull() const;

    void setCustomNodeFilter(CustomNodeFilter *custom);
    CustomNodeFilter *customNodeFilter();
    static NodeFilter createCustom(CustomNodeFilter *custom);

protected:
    NodeFilterImpl *impl;
};

class KHTML_EXPORT CustomNodeFilter : public DomShared {
public:
    CustomNodeFilter();
    virtual ~CustomNodeFilter();
    virtual short acceptNode (const Node &n);
    virtual bool isNull();

    virtual DOMString customNodeFilterType();

protected:
    CustomNodeFilterImpl *impl;
};

class KHTML_EXPORT TreeWalker
{
    friend class Document;
    friend class TreeWalkerImpl;
public:
    TreeWalker();
    TreeWalker(const TreeWalker &other);

    TreeWalker & operator = (const TreeWalker &other);

    ~TreeWalker();


    Node root();

    unsigned long whatToShow();

    NodeFilter filter();

    bool expandEntityReferences();

    Node currentNode();

    void setCurrentNode(const Node &_currentNode);

    Node parentNode();

    Node firstChild();

    Node lastChild();

    Node previousSibling();

    Node nextSibling();

    Node previousNode();

    Node nextNode();

    TreeWalkerImpl *handle() const;
    bool isNull() const;

protected:
    TreeWalker(TreeWalkerImpl *i);
    TreeWalkerImpl *impl;
};


} // namespace

#endif