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 "NodeIterator.h" |
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|
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#include "Document.h" |
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#include "ExceptionCode.h" |
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#include "NodeFilter.h" |
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|
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namespace WebCore { |
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|
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NodeIterator::NodeIterator(Node* rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter, bool expandEntityReferences) |
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: Traversal(rootNode, whatToShow, filter, expandEntityReferences) |
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, m_beforeReferenceNode(true) |
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, m_detached(false) |
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, m_doc(rootNode ? rootNode->document() : 0) |
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{ |
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if (document()) |
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document()->attachNodeIterator(this); |
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} |
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|
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NodeIterator::~NodeIterator() |
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{ |
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if (document()) |
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document()->detachNodeIterator(this); |
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} |
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|
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Node* NodeIterator::findNextNode(Node* node) const |
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{ |
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while ((node = node->traverseNextNode(root()))) { |
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// NodeIterators treat the DOM tree as a flat list of nodes. |
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// In other words, FILTER_REJECT does not pass over descendants |
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// of the rejected node. Hence, FILTER_REJECT is the same as FILTER_SKIP. |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) |
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break; |
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} |
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return node; |
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} |
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|
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Node* NodeIterator::nextNode(ExceptionCode& ec) |
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{ |
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if (detached()) { |
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ec = INVALID_STATE_ERR; |
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return 0; |
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} |
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|
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Node* node = referenceNode() ? referenceNode() : root(); |
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if (!pointerBeforeReferenceNode() || acceptNode(node) != NodeFilter::FILTER_ACCEPT) |
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node = findNextNode(node); |
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if (node) |
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setReferenceNode(node); |
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setPointerBeforeReferenceNode(false); |
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return node; |
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} |
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|
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Node* NodeIterator::findPreviousNode(Node* node) const |
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{ |
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while ((node = node->traversePreviousNode(root()))) { |
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// NodeIterators treat the DOM tree as a flat list of nodes. |
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// In other words, FILTER_REJECT does not pass over descendants |
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// of the rejected node. Hence, FILTER_REJECT is the same as FILTER_SKIP. |
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if (acceptNode(node) == NodeFilter::FILTER_ACCEPT) |
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break; |
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} |
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return node; |
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} |
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|
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Node* NodeIterator::previousNode(ExceptionCode&) |
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{ |
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Node* node = referenceNode() ? referenceNode() : root(); |
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if (pointerBeforeReferenceNode() || acceptNode(node) != NodeFilter::FILTER_ACCEPT) |
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node = findPreviousNode(node); |
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if (node) |
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setReferenceNode(node); |
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setPointerBeforeReferenceNode(); |
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return node; |
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} |
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|
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void NodeIterator::detach() |
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{ |
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if (!detached() && document()) |
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document()->detachNodeIterator(this); |
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setDetached(); |
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} |
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void NodeIterator::setReferenceNode(Node* node) |
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{ |
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m_referenceNode = node; |
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} |
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void NodeIterator::notifyBeforeNodeRemoval(Node* removedNode) |
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{ |
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// Iterator is not affected if the removed node is the reference node and is the root. |
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// or if removed node is not the reference node, or the ancestor of the reference node. |
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if (!removedNode || removedNode == root() || !removedNode->isDescendantOf(root())) |
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return; |
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bool willRemoveReferenceNode = removedNode == referenceNode(); |
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bool willRemoveReferenceNodeAncestor = referenceNode() && referenceNode()->isDescendantOf(removedNode); |
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if (!willRemoveReferenceNode && !willRemoveReferenceNodeAncestor) |
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return; |
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if (pointerBeforeReferenceNode()) { |
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Node* node = findNextNode(removedNode); |
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if (node) { |
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// Move out from under the node being removed if the reference node is |
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// a descendant of the node being removed. |
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if (willRemoveReferenceNodeAncestor) { |
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while (node && node->isDescendantOf(removedNode)) |
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node = findNextNode(node); |
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} |
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if (node) |
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setReferenceNode(node); |
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} else { |
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node = findPreviousNode(removedNode); |
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if (node) { |
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// Move out from under the node being removed if the reference node is |
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// a descendant of the node being removed. |
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if (willRemoveReferenceNodeAncestor) { |
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while (node && node->isDescendantOf(removedNode)) |
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node = findPreviousNode(node); |
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} |
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if (node) { |
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// Removing last node. |
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// Need to move the pointer after the node preceding the |
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// new reference node. |
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setReferenceNode(node); |
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setPointerBeforeReferenceNode(false); |
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} |
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} |
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} |
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} else { |
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Node* node = findPreviousNode(removedNode); |
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if (node) { |
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// Move out from under the node being removed if the reference node is |
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// a descendant of the node being removed. |
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if (willRemoveReferenceNodeAncestor) { |
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while (node && node->isDescendantOf(removedNode)) |
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node = findPreviousNode(node); |
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} |
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if (node) |
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setReferenceNode(node); |
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} else { |
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node = findNextNode(removedNode); |
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// Move out from under the node being removed if the reference node is |
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// a descendant of the node being removed. |
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if (willRemoveReferenceNodeAncestor) { |
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while (node && node->isDescendantOf(removedNode)) |
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node = findPreviousNode(node); |
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} |
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if (node) |
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setReferenceNode(node); |
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} |
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} |
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} |
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} // namespace WebCore |