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#ifndef TreeWalker_h 26#define TreeWalker_h 27 28#include "NodeFilter.h" 29#include "ScriptWrappable.h" 30#include "Traversal.h" 31#include <wtf/PassRefPtr.h> 32#include <wtf/RefCounted.h> 33 34namespace WebCore { 35 36 typedef int ExceptionCode; 37 38 class TreeWalker : public ScriptWrappable, public RefCounted<TreeWalker>, public Traversal { 39 public: 40 static PassRefPtr<TreeWalker> create(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter, bool expandEntityReferences) 41 { 42 return adoptRef(new TreeWalker(rootNode, whatToShow, filter, expandEntityReferences)); 43 } 44 45 Node* currentNode() const { return m_current.get(); } 46 void setCurrentNode(PassRefPtr<Node>, ExceptionCode&); 47 48 Node* parentNode(ScriptState*); 49 Node* firstChild(ScriptState*); 50 Node* lastChild(ScriptState*); 51 Node* previousSibling(ScriptState*); 52 Node* nextSibling(ScriptState*); 53 Node* previousNode(ScriptState*); 54 Node* nextNode(ScriptState*); 55 56 // Do not call these functions. They are just scaffolding to support the Objective-C bindings. 57 // They operate in the main thread normal world, and they swallow JS exceptions. 58 Node* parentNode() { return parentNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 59 Node* firstChild() { return firstChild(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 60 Node* lastChild() { return lastChild(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 61 Node* previousSibling() { return previousSibling(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 62 Node* nextSibling() { return nextSibling(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 63 Node* previousNode() { return previousNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 64 Node* nextNode() { return nextNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 65 66 private: 67 TreeWalker(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>, bool expandEntityReferences); 68 69 Node* setCurrent(PassRefPtr<Node>); 70 71 RefPtr<Node> m_current; 72 }; 73 74} // namespace WebCore 75 76#endif // TreeWalker_h 77