WebCore/dom/Traversal.cpp

   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 "Traversal.h"
  27
  28 #include "Node.h"
  29 #include "NodeFilter.h"
  30
  31 using namespace JSC;
  32
  33 namespace WebCore {
  34
  35 Traversal::Traversal(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> nodeFilter, bool expandEntityReferences)
  36     : m_root(rootNode)
  37     , m_whatToShow(whatToShow)
  38     , m_filter(nodeFilter)
  39     , m_expandEntityReferences(expandEntityReferences)
  40 {
  41 }
  42
  43 short Traversal::acceptNode(ExecState* exec, Node* node) const
  44 {
  45     // FIXME: To handle XML properly we would have to check m_expandEntityReferences.
  46
  47     // The bit twiddling here is done to map DOM node types, which are given as integers from
  48     // 1 through 12, to whatToShow bit masks.
  49     if (!(((1 << (node->nodeType() - 1)) & m_whatToShow)))
  50         return NodeFilter::FILTER_SKIP;
  51     if (!m_filter)
  52         return NodeFilter::FILTER_ACCEPT;
  53     return m_filter->acceptNode(exec, node);
  54 }
  55
  56 } // namespace WebCore