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 "bindings/core/v8/ScriptWrappable.h" 29 #include "core/dom/NodeFilter.h" 30 #include "core/dom/NodeIteratorBase.h" 31 #include "platform/heap/Handle.h" 32 #include "wtf/PassRefPtr.h" 33 #include "wtf/RefCounted.h" 34 35 namespace blink { 36 37 class ExceptionState; 38 39 class TreeWalker FINAL : public RefCountedWillBeGarbageCollected<TreeWalker>, public ScriptWrappable, public NodeIteratorBase { 40 DEFINE_WRAPPERTYPEINFO(); 41 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TreeWalker); 42 public: create(PassRefPtrWillBeRawPtr<Node> rootNode,unsigned whatToShow,PassRefPtrWillBeRawPtr<NodeFilter> filter)43 static PassRefPtrWillBeRawPtr<TreeWalker> create(PassRefPtrWillBeRawPtr<Node> rootNode, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter> filter) 44 { 45 return adoptRefWillBeNoop(new TreeWalker(rootNode, whatToShow, filter)); 46 } 47 currentNode()48 Node* currentNode() const { return m_current.get(); } 49 void setCurrentNode(PassRefPtrWillBeRawPtr<Node>, ExceptionState&); 50 51 Node* parentNode(ExceptionState&); 52 Node* firstChild(ExceptionState&); 53 Node* lastChild(ExceptionState&); 54 Node* previousSibling(ExceptionState&); 55 Node* nextSibling(ExceptionState&); 56 Node* previousNode(ExceptionState&); 57 Node* nextNode(ExceptionState&); 58 59 void trace(Visitor*); 60 61 private: 62 TreeWalker(PassRefPtrWillBeRawPtr<Node>, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter>); 63 64 Node* setCurrent(PassRefPtrWillBeRawPtr<Node>); 65 66 RefPtrWillBeMember<Node> m_current; 67 }; 68 69 } // namespace blink 70 71 #endif // TreeWalker_h 72