1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
4 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
5 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
6 * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#include "config.h"
26#include "core/dom/NodeIteratorBase.h"
27
28#include "bindings/core/v8/ExceptionState.h"
29#include "core/dom/Node.h"
30#include "core/dom/NodeFilter.h"
31
32namespace blink {
33
34DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NodeIteratorBase);
35
36NodeIteratorBase::NodeIteratorBase(PassRefPtrWillBeRawPtr<Node> rootNode, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter> nodeFilter)
37    : m_root(rootNode)
38    , m_whatToShow(whatToShow)
39    , m_filter(nodeFilter)
40{
41}
42
43short NodeIteratorBase::acceptNode(Node* node, ExceptionState& exceptionState) const
44{
45    // The bit twiddling here is done to map DOM node types, which are given as integers from
46    // 1 through 14, to whatToShow bit masks.
47    if (!(((1 << (node->nodeType() - 1)) & m_whatToShow)))
48        return NodeFilter::FILTER_SKIP;
49    if (!m_filter)
50        return NodeFilter::FILTER_ACCEPT;
51    return m_filter->acceptNode(node, exceptionState);
52}
53
54void NodeIteratorBase::trace(Visitor* visitor)
55{
56    visitor->trace(m_root);
57    visitor->trace(m_filter);
58}
59
60} // namespace blink
61