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.
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.
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.
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.
26 #include "core/dom/TreeWalker.h"
28 #include "bindings/core/v8/ExceptionMessages.h"
29 #include "bindings/core/v8/ExceptionState.h"
30 #include "core/dom/ContainerNode.h"
31 #include "core/dom/ExceptionCode.h"
32 #include "core/dom/NodeTraversal.h"
36 TreeWalker::TreeWalker(PassRefPtrWillBeRawPtr<Node> rootNode, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter> filter)
37 : NodeIteratorBase(rootNode, whatToShow, filter)
42 void TreeWalker::setCurrentNode(PassRefPtrWillBeRawPtr<Node> node, ExceptionState& exceptionState)
45 exceptionState.throwDOMException(NotSupportedError, ExceptionMessages::argumentNullOrIncorrectType(1, "Node"));
51 inline Node* TreeWalker::setCurrent(PassRefPtrWillBeRawPtr<Node> node)
54 return m_current.get();
57 Node* TreeWalker::parentNode(ExceptionState& exceptionState)
59 RefPtrWillBeRawPtr<Node> node = m_current;
60 while (node != root()) {
61 node = node->parentNode();
64 short acceptNodeResult = acceptNode(node.get(), exceptionState);
65 if (exceptionState.hadException())
67 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
68 return setCurrent(node.release());
73 Node* TreeWalker::firstChild(ExceptionState& exceptionState)
75 for (RefPtrWillBeRawPtr<Node> node = m_current->firstChild(); node; ) {
76 short acceptNodeResult = acceptNode(node.get(), exceptionState);
77 if (exceptionState.hadException())
79 switch (acceptNodeResult) {
80 case NodeFilter::FILTER_ACCEPT:
81 m_current = node.release();
82 return m_current.get();
83 case NodeFilter::FILTER_SKIP:
84 if (node->hasChildren()) {
85 node = node->firstChild();
89 case NodeFilter::FILTER_REJECT:
93 if (node->nextSibling()) {
94 node = node->nextSibling();
97 ContainerNode* parent = node->parentNode();
98 if (!parent || parent == root() || parent == m_current)
106 Node* TreeWalker::lastChild(ExceptionState& exceptionState)
108 for (RefPtrWillBeRawPtr<Node> node = m_current->lastChild(); node; ) {
109 short acceptNodeResult = acceptNode(node.get(), exceptionState);
110 if (exceptionState.hadException())
112 switch (acceptNodeResult) {
113 case NodeFilter::FILTER_ACCEPT:
114 m_current = node.release();
115 return m_current.get();
116 case NodeFilter::FILTER_SKIP:
117 if (node->lastChild()) {
118 node = node->lastChild();
122 case NodeFilter::FILTER_REJECT:
126 if (node->previousSibling()) {
127 node = node->previousSibling();
130 ContainerNode* parent = node->parentNode();
131 if (!parent || parent == root() || parent == m_current)
139 Node* TreeWalker::previousSibling(ExceptionState& exceptionState)
141 RefPtrWillBeRawPtr<Node> node = m_current;
145 for (RefPtrWillBeRawPtr<Node> sibling = node->previousSibling(); sibling; ) {
146 short acceptNodeResult = acceptNode(sibling.get(), exceptionState);
147 if (exceptionState.hadException())
149 switch (acceptNodeResult) {
150 case NodeFilter::FILTER_ACCEPT:
151 m_current = sibling.release();
152 return m_current.get();
153 case NodeFilter::FILTER_SKIP:
154 if (sibling->lastChild()) {
155 sibling = sibling->lastChild();
160 case NodeFilter::FILTER_REJECT:
163 sibling = sibling->previousSibling();
165 node = node->parentNode();
166 if (!node || node == root())
168 short acceptNodeResult = acceptNode(node.get(), exceptionState);
169 if (exceptionState.hadException())
171 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
176 Node* TreeWalker::nextSibling(ExceptionState& exceptionState)
178 RefPtrWillBeRawPtr<Node> node = m_current;
182 for (RefPtrWillBeRawPtr<Node> sibling = node->nextSibling(); sibling; ) {
183 short acceptNodeResult = acceptNode(sibling.get(), exceptionState);
184 if (exceptionState.hadException())
186 switch (acceptNodeResult) {
187 case NodeFilter::FILTER_ACCEPT:
188 m_current = sibling.release();
189 return m_current.get();
190 case NodeFilter::FILTER_SKIP:
191 if (sibling->hasChildren()) {
192 sibling = sibling->firstChild();
197 case NodeFilter::FILTER_REJECT:
200 sibling = sibling->nextSibling();
202 node = node->parentNode();
203 if (!node || node == root())
205 short acceptNodeResult = acceptNode(node.get(), exceptionState);
206 if (exceptionState.hadException())
208 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
213 Node* TreeWalker::previousNode(ExceptionState& exceptionState)
215 RefPtrWillBeRawPtr<Node> node = m_current;
216 while (node != root()) {
217 while (Node* previousSibling = node->previousSibling()) {
218 node = previousSibling;
219 short acceptNodeResult = acceptNode(node.get(), exceptionState);
220 if (exceptionState.hadException())
222 if (acceptNodeResult == NodeFilter::FILTER_REJECT)
224 while (Node* lastChild = node->lastChild()) {
226 acceptNodeResult = acceptNode(node.get(), exceptionState);
227 if (exceptionState.hadException())
229 if (acceptNodeResult == NodeFilter::FILTER_REJECT)
232 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT) {
233 m_current = node.release();
234 return m_current.get();
239 ContainerNode* parent = node->parentNode();
243 short acceptNodeResult = acceptNode(node.get(), exceptionState);
244 if (exceptionState.hadException())
246 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
247 return setCurrent(node.release());
252 Node* TreeWalker::nextNode(ExceptionState& exceptionState)
254 RefPtrWillBeRawPtr<Node> node = m_current;
256 while (Node* firstChild = node->firstChild()) {
258 short acceptNodeResult = acceptNode(node.get(), exceptionState);
259 if (exceptionState.hadException())
261 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
262 return setCurrent(node.release());
263 if (acceptNodeResult == NodeFilter::FILTER_REJECT)
266 while (Node* nextSibling = NodeTraversal::nextSkippingChildren(*node, root())) {
268 short acceptNodeResult = acceptNode(node.get(), exceptionState);
269 if (exceptionState.hadException())
271 if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
272 return setCurrent(node.release());
273 if (acceptNodeResult == NodeFilter::FILTER_SKIP)
279 void TreeWalker::trace(Visitor* visitor)
281 visitor->trace(m_current);
282 NodeIteratorBase::trace(visitor);