1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * Copyright (C) 2000 Frederik Holljen (frederik.holljen (at) hig.no) 4 * Copyright (C) 2001 Peter Kelly (pmk (at) post.com) 5 * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) 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 "Traversal.h" 30 #include <wtf/PassRefPtr.h> 31 #include <wtf/RefCounted.h> 32 33 namespace WebCore { 34 35 typedef int ExceptionCode; 36 37 class TreeWalker : public RefCounted<TreeWalker>, public Traversal { 38 public: 39 static PassRefPtr<TreeWalker> create(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter, bool expandEntityReferences) 40 { 41 return adoptRef(new TreeWalker(rootNode, whatToShow, filter, expandEntityReferences)); 42 } 43 44 Node* currentNode() const { return m_current.get(); } 45 void setCurrentNode(PassRefPtr<Node>, ExceptionCode&); 46 47 Node* parentNode(ScriptState*); 48 Node* firstChild(ScriptState*); 49 Node* lastChild(ScriptState*); 50 Node* previousSibling(ScriptState*); 51 Node* nextSibling(ScriptState*); 52 Node* previousNode(ScriptState*); 53 Node* nextNode(ScriptState*); 54 55 // Do not call these functions. They are just scaffolding to support the Objective-C bindings. 56 // They operate in the main thread normal world, and they swallow JS exceptions. 57 Node* parentNode() { return parentNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 58 Node* firstChild() { return firstChild(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 59 Node* lastChild() { return lastChild(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 60 Node* previousSibling() { return previousSibling(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 61 Node* nextSibling() { return nextSibling(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 62 Node* previousNode() { return previousNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 63 Node* nextNode() { return nextNode(scriptStateFromNode(mainThreadNormalWorld(), m_current.get())); } 64 65 private: 66 TreeWalker(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>, bool expandEntityReferences); 67 68 Node* setCurrent(PassRefPtr<Node>); 69 70 RefPtr<Node> m_current; 71 }; 72 73 } // namespace WebCore 74 75 #endif // TreeWalker_h 76
