author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
Fri, 08 May 2009 08:25:06 +0300 | |
changeset 8 | 7c90e6132015 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/** |
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* This file is part of the DOM implementation for KDE. |
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* |
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
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* Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no) |
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* Copyright (C) 2001 Peter Kelly (pmk@post.com) |
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* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
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* Copyright (C) 2004 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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|
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#include "config.h" |
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#include "TreeWalker.h" |
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|
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#include "ExceptionCode.h" |
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#include "Node.h" |
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#include "NodeFilter.h" |
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#include <wtf/PassRefPtr.h> |
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|
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namespace WebCore { |
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|
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TreeWalker::TreeWalker(Node* rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter, bool expandEntityReferences) |
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: Traversal(rootNode, whatToShow, filter, expandEntityReferences) |
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, m_current(rootNode) |
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{ |
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} |
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|
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void TreeWalker::setCurrentNode(Node* node, ExceptionCode& ec) |
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{ |
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if (!node) { |
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ec = NOT_SUPPORTED_ERR; |
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return; |
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} |
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m_current = node; |
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} |
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|
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void TreeWalker::setCurrentNode(Node* node) |
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{ |
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ASSERT(node); |
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int dummy; |
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setCurrentNode(node, dummy); |
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} |
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|
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Node* TreeWalker::parentNode() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->parentNode(); node && node != root(); node = node->parentNode()) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::firstChild() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->firstChild(); node; node = node->nextSibling()) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::lastChild() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->lastChild(); node; node = node->previousSibling()) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::previousSibling() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->previousSibling(); node; node = node->previousSibling()) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::nextSibling() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->nextSibling(); node; node = node->nextSibling()) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::previousNode() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->traversePreviousNode(root()); node; node = node->traversePreviousNode(root())) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT && !ancestorRejected(node)) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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|
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Node* TreeWalker::nextNode() |
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{ |
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Node* result = 0; |
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for (Node* node = currentNode()->traverseNextNode(root()); node; node = node->traverseNextNode(root())) { |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT && !ancestorRejected(node)) { |
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setCurrentNode(node); |
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result = node; |
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break; |
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} |
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} |
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return result; |
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} |
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bool TreeWalker::ancestorRejected(const Node* node) const |
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{ |
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for (Node* a = node->parentNode(); a && a != root(); a = a->parentNode()) { |
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if (acceptNode(a) == NodeFilter::FILTER_REJECT) |
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return true; |
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} |
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return false; |
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} |
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|
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} // namespace WebCore |