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 NodeIterator_h 26 #define NodeIterator_h 27 28 #include "bindings/v8/ScriptWrappable.h" 29 #include "core/dom/NodeFilter.h" 30 #include "core/dom/Traversal.h" 31 #include "wtf/PassRefPtr.h" 32 #include "wtf/RefCounted.h" 33 34 namespace WebCore { 35 36 class ExceptionState; 37 38 class NodeIterator : public ScriptWrappable, public RefCounted<NodeIterator>, public Traversal { 39 public: 40 static PassRefPtr<NodeIterator> create(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter) 41 { 42 return adoptRef(new NodeIterator(rootNode, whatToShow, filter)); 43 } 44 ~NodeIterator(); 45 46 PassRefPtr<Node> nextNode(ScriptState*, ExceptionState&); 47 PassRefPtr<Node> previousNode(ScriptState*, ExceptionState&); 48 void detach(); 49 50 Node* referenceNode() const { return m_referenceNode.node.get(); } 51 bool pointerBeforeReferenceNode() const { return m_referenceNode.isPointerBeforeNode; } 52 53 // This function is called before any node is removed from the document tree. 54 void nodeWillBeRemoved(Node*); 55 56 private: 57 NodeIterator(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>); 58 59 struct NodePointer { 60 RefPtr<Node> node; 61 bool isPointerBeforeNode; 62 NodePointer(); 63 NodePointer(PassRefPtr<Node>, bool); 64 void clear(); 65 bool moveToNext(Node* root); 66 bool moveToPrevious(Node* root); 67 }; 68 69 void updateForNodeRemoval(Node* nodeToBeRemoved, NodePointer&) const; 70 71 NodePointer m_referenceNode; 72 NodePointer m_candidateNode; 73 bool m_detached; 74 }; 75 76 } // namespace WebCore 77 78 #endif // NodeIterator_h 79
