/* * 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 "config.h" #include "Traversal.h" #include "CallbackResult.h" #include "Node.h" #include "NodeFilter.h" #include <wtf/SetForScope.h> namespace WebCore { NodeIteratorBase::NodeIteratorBase(Node& rootNode, unsigned whatToShow, RefPtr<NodeFilter>&& nodeFilter) : m_root(rootNode) , m_filter(WTFMove(nodeFilter)) , m_whatToShow(whatToShow) { } // https://dom.spec.whatwg.org/#concept-node-filter ExceptionOr<unsigned short> NodeIteratorBase::acceptNode(Node& node) { if (m_isActive) return Exception { InvalidStateError, "Recursive filters are not allowed"_s }; // 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.nodeType() - 1)) & m_whatToShow))) return NodeFilter::FILTER_SKIP; if (!m_filter) return NodeFilter::FILTER_ACCEPT; SetForScope<bool> isActive(m_isActive, true); auto callbackResult = m_filter->acceptNode(node); if (callbackResult.type() == CallbackResultType::ExceptionThrown) return Exception { ExistingExceptionError }; return callbackResult.releaseReturnValue(); } } // namespace WebCore