third_party/WebKit/Source/core/dom/NodeIteratorBase.cpp

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
 * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
 *
 * 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.
 *
 */

#include "core/dom/NodeIteratorBase.h"

#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/V8NodeFilterCondition.h"
#include "core/dom/Node.h"
#include "core/dom/NodeFilter.h"

namespace blink {

NodeIteratorBase::NodeIteratorBase(Node* root_node,
                                   unsigned what_to_show,
                                   V8NodeFilterCondition* node_filter)
    : root_(root_node), what_to_show_(what_to_show), filter_(node_filter) {}

unsigned NodeIteratorBase::AcceptNode(Node* node,
                                      ExceptionState& exception_state) const {
  // The bit twiddling here is done to map DOM node types, which are given as
  // integers from 1 through 14, to whatToShow bit masks.
  if (!(((1 << (node->getNodeType() - 1)) & what_to_show_)))
    return NodeFilter::kFilterSkip;
  if (!filter_)
    return NodeFilter::kFilterAccept;
  return filter_->acceptNode(node, exception_state);
}

void NodeIteratorBase::Trace(blink::Visitor* visitor) {
  visitor->Trace(root_);
  visitor->Trace(filter_);
}

void NodeIteratorBase::TraceWrappers(
    const ScriptWrappableVisitor* visitor) const {
  visitor->TraceWrappers(filter_);
}

}  // namespace blink