Source Code Cross Referenced for DOMNodeImpl.java in  » HTML-Parser » JTidy » org » w3c » tidy » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » HTML Parser » JTidy » org.w3c.tidy 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Java HTML Tidy - JTidy
003:         *  HTML parser and pretty printer
004:         *
005:         *  Copyright (c) 1998-2000 World Wide Web Consortium (Massachusetts
006:         *  Institute of Technology, Institut National de Recherche en
007:         *  Informatique et en Automatique, Keio University). All Rights
008:         *  Reserved.
009:         *
010:         *  Contributing Author(s):
011:         *
012:         *     Dave Raggett <dsr@w3.org>
013:         *     Andy Quick <ac.quick@sympatico.ca> (translation to Java)
014:         *     Gary L Peskin <garyp@firstech.com> (Java development)
015:         *     Sami Lempinen <sami@lempinen.net> (release management)
016:         *     Fabrizio Giustina <fgiust at users.sourceforge.net>
017:         *
018:         *  The contributing author(s) would like to thank all those who
019:         *  helped with testing, bug fixes, and patience.  This wouldn't
020:         *  have been possible without all of you.
021:         *
022:         *  COPYRIGHT NOTICE:
023:         * 
024:         *  This software and documentation is provided "as is," and
025:         *  the copyright holders and contributing author(s) make no
026:         *  representations or warranties, express or implied, including
027:         *  but not limited to, warranties of merchantability or fitness
028:         *  for any particular purpose or that the use of the software or
029:         *  documentation will not infringe any third party patents,
030:         *  copyrights, trademarks or other rights. 
031:         *
032:         *  The copyright holders and contributing author(s) will not be
033:         *  liable for any direct, indirect, special or consequential damages
034:         *  arising out of any use of the software or documentation, even if
035:         *  advised of the possibility of such damage.
036:         *
037:         *  Permission is hereby granted to use, copy, modify, and distribute
038:         *  this source code, or portions hereof, documentation and executables,
039:         *  for any purpose, without fee, subject to the following restrictions:
040:         *
041:         *  1. The origin of this source code must not be misrepresented.
042:         *  2. Altered versions must be plainly marked as such and must
043:         *     not be misrepresented as being the original source.
044:         *  3. This Copyright notice may not be removed or altered from any
045:         *     source or altered source distribution.
046:         * 
047:         *  The copyright holders and contributing author(s) specifically
048:         *  permit, without fee, and encourage the use of this source code
049:         *  as a component for supporting the Hypertext Markup Language in
050:         *  commercial products. If you use this source code in a product,
051:         *  acknowledgment is not required but would be appreciated.
052:         *
053:         */
054:
055:        package org.w3c.tidy;
056:
057:        import org.w3c.dom.DOMException;
058:        import org.w3c.dom.UserDataHandler;
059:
060:        /**
061:         * DOMNodeImpl.
062:         * @author Dave Raggett <a href="mailto:dsr@w3.org">dsr@w3.org </a>
063:         * @author Andy Quick <a href="mailto:ac.quick@sympatico.ca">ac.quick@sympatico.ca </a> (translation to Java)
064:         * @author Fabrizio Giustina
065:         * @version $Revision: 1.15 $ ($Author: fgiust $)
066:         */
067:        public class DOMNodeImpl implements  org.w3c.dom.Node {
068:
069:            /**
070:             * Wrapped tidy node.
071:             */
072:            protected Node adaptee;
073:
074:            /**
075:             * Intantiates a new DOM node.
076:             * @param adaptee wrapped Tidy node
077:             */
078:            protected DOMNodeImpl(Node adaptee) {
079:                this .adaptee = adaptee;
080:            }
081:
082:            /**
083:             * @see org.w3c.dom.Node#getNodeValue
084:             */
085:            public String getNodeValue() {
086:                String value = ""; // BAK 10/10/2000 replaced null
087:                if (adaptee.type == Node.TEXT_NODE
088:                        || adaptee.type == Node.CDATA_TAG
089:                        || adaptee.type == Node.COMMENT_TAG
090:                        || adaptee.type == Node.PROC_INS_TAG) {
091:
092:                    if (adaptee.textarray != null
093:                            && adaptee.start < adaptee.end) {
094:                        value = TidyUtils.getString(adaptee.textarray,
095:                                adaptee.start, adaptee.end - adaptee.start);
096:                    }
097:                }
098:                return value;
099:            }
100:
101:            /**
102:             * @see org.w3c.dom.Node#setNodeValue
103:             */
104:            public void setNodeValue(String nodeValue) {
105:                if (adaptee.type == Node.TEXT_NODE
106:                        || adaptee.type == Node.CDATA_TAG
107:                        || adaptee.type == Node.COMMENT_TAG
108:                        || adaptee.type == Node.PROC_INS_TAG) {
109:                    byte[] textarray = TidyUtils.getBytes(nodeValue);
110:                    adaptee.textarray = textarray;
111:                    adaptee.start = 0;
112:                    adaptee.end = textarray.length;
113:                }
114:            }
115:
116:            /**
117:             * @see org.w3c.dom.Node#getNodeName
118:             */
119:            public String getNodeName() {
120:                return adaptee.element;
121:            }
122:
123:            /**
124:             * @see org.w3c.dom.Node#getNodeType
125:             */
126:            public short getNodeType() {
127:                short result = -1;
128:                switch (adaptee.type) {
129:                case Node.ROOT_NODE:
130:                    result = org.w3c.dom.Node.DOCUMENT_NODE;
131:                    break;
132:                case Node.DOCTYPE_TAG:
133:                    result = org.w3c.dom.Node.DOCUMENT_TYPE_NODE;
134:                    break;
135:                case Node.COMMENT_TAG:
136:                    result = org.w3c.dom.Node.COMMENT_NODE;
137:                    break;
138:                case Node.PROC_INS_TAG:
139:                    result = org.w3c.dom.Node.PROCESSING_INSTRUCTION_NODE;
140:                    break;
141:                case Node.TEXT_NODE:
142:                    result = org.w3c.dom.Node.TEXT_NODE;
143:                    break;
144:                case Node.CDATA_TAG:
145:                    result = org.w3c.dom.Node.CDATA_SECTION_NODE;
146:                    break;
147:                case Node.START_TAG:
148:                case Node.START_END_TAG:
149:                    result = org.w3c.dom.Node.ELEMENT_NODE;
150:                    break;
151:                }
152:                return result;
153:            }
154:
155:            /**
156:             * @see org.w3c.dom.Node#getParentNode
157:             */
158:            public org.w3c.dom.Node getParentNode() {
159:                // Attributes are not children in the DOM, and do not have parents
160:                if (adaptee.parent != null) {
161:                    return adaptee.parent.getAdapter();
162:                }
163:                return null;
164:            }
165:
166:            /**
167:             * @see org.w3c.dom.Node#getChildNodes
168:             */
169:            public org.w3c.dom.NodeList getChildNodes() {
170:                return new DOMNodeListImpl(adaptee);
171:            }
172:
173:            /**
174:             * @see org.w3c.dom.Node#getFirstChild
175:             */
176:            public org.w3c.dom.Node getFirstChild() {
177:                if (adaptee.content != null) {
178:                    return adaptee.content.getAdapter();
179:                }
180:                return null;
181:            }
182:
183:            /**
184:             * @see org.w3c.dom.Node#getLastChild
185:             */
186:            public org.w3c.dom.Node getLastChild() {
187:                if (adaptee.last != null) {
188:                    return adaptee.last.getAdapter();
189:                }
190:                return null;
191:            }
192:
193:            /**
194:             * @see org.w3c.dom.Node#getPreviousSibling
195:             */
196:            public org.w3c.dom.Node getPreviousSibling() {
197:                if (adaptee.prev != null) {
198:                    return adaptee.prev.getAdapter();
199:                }
200:                return null;
201:            }
202:
203:            /**
204:             * @see org.w3c.dom.Node#getNextSibling
205:             */
206:            public org.w3c.dom.Node getNextSibling() {
207:                if (adaptee.next != null) {
208:                    return adaptee.next.getAdapter();
209:                }
210:                return null;
211:            }
212:
213:            /**
214:             * @see org.w3c.dom.Node#getAttributes
215:             */
216:            public org.w3c.dom.NamedNodeMap getAttributes() {
217:                return new DOMAttrMapImpl(adaptee.attributes);
218:            }
219:
220:            /**
221:             * @see org.w3c.dom.Node#getOwnerDocument
222:             */
223:            public org.w3c.dom.Document getOwnerDocument() {
224:                Node node = this .adaptee;
225:                if (node != null && node.type == Node.ROOT_NODE) {
226:                    return null;
227:                }
228:
229:                while (node != null && node.type != Node.ROOT_NODE) {
230:                    node = node.parent;
231:                }
232:
233:                if (node != null) {
234:                    return (org.w3c.dom.Document) node.getAdapter();
235:                }
236:                return null;
237:            }
238:
239:            /**
240:             * @see org.w3c.dom.Node#insertBefore
241:             */
242:            public org.w3c.dom.Node insertBefore(org.w3c.dom.Node newChild,
243:                    org.w3c.dom.Node refChild) {
244:                // TODO - handle newChild already in tree
245:
246:                if (newChild == null) {
247:                    return null;
248:                }
249:                if (!(newChild instanceof  DOMNodeImpl)) {
250:                    throw new DOMException(DOMException.WRONG_DOCUMENT_ERR,
251:                            "newChild not instanceof DOMNodeImpl");
252:                }
253:                DOMNodeImpl newCh = (DOMNodeImpl) newChild;
254:
255:                if (this .adaptee.type == Node.ROOT_NODE) {
256:                    if (newCh.adaptee.type != Node.DOCTYPE_TAG
257:                            && newCh.adaptee.type != Node.PROC_INS_TAG) {
258:                        throw new DOMException(
259:                                DOMException.HIERARCHY_REQUEST_ERR,
260:                                "newChild cannot be a child of this node");
261:                    }
262:                } else if (this .adaptee.type == Node.START_TAG) {
263:                    if (newCh.adaptee.type != Node.START_TAG
264:                            && newCh.adaptee.type != Node.START_END_TAG
265:                            && newCh.adaptee.type != Node.COMMENT_TAG
266:                            && newCh.adaptee.type != Node.TEXT_NODE
267:                            && newCh.adaptee.type != Node.CDATA_TAG) {
268:                        throw new DOMException(
269:                                DOMException.HIERARCHY_REQUEST_ERR,
270:                                "newChild cannot be a child of this node");
271:                    }
272:                }
273:                if (refChild == null) {
274:                    this .adaptee.insertNodeAtEnd(newCh.adaptee);
275:                    if (this .adaptee.type == Node.START_END_TAG) {
276:                        this .adaptee.setType(Node.START_TAG);
277:                    }
278:                } else {
279:                    Node ref = this .adaptee.content;
280:                    while (ref != null) {
281:                        if (ref.getAdapter() == refChild) {
282:                            break;
283:                        }
284:                        ref = ref.next;
285:                    }
286:                    if (ref == null) {
287:                        throw new DOMException(DOMException.NOT_FOUND_ERR,
288:                                "refChild not found");
289:                    }
290:                    Node.insertNodeBeforeElement(ref, newCh.adaptee);
291:                }
292:                return newChild;
293:            }
294:
295:            /**
296:             * @see org.w3c.dom.Node#replaceChild
297:             */
298:            public org.w3c.dom.Node replaceChild(org.w3c.dom.Node newChild,
299:                    org.w3c.dom.Node oldChild) {
300:                // TODO - handle newChild already in tree
301:
302:                if (newChild == null) {
303:                    return null;
304:                }
305:                if (!(newChild instanceof  DOMNodeImpl)) {
306:                    throw new DOMException(DOMException.WRONG_DOCUMENT_ERR,
307:                            "newChild not instanceof DOMNodeImpl");
308:                }
309:                DOMNodeImpl newCh = (DOMNodeImpl) newChild;
310:
311:                if (this .adaptee.type == Node.ROOT_NODE) {
312:                    if (newCh.adaptee.type != Node.DOCTYPE_TAG
313:                            && newCh.adaptee.type != Node.PROC_INS_TAG) {
314:                        throw new DOMException(
315:                                DOMException.HIERARCHY_REQUEST_ERR,
316:                                "newChild cannot be a child of this node");
317:                    }
318:                } else if (this .adaptee.type == Node.START_TAG) {
319:                    if (newCh.adaptee.type != Node.START_TAG
320:                            && newCh.adaptee.type != Node.START_END_TAG
321:                            && newCh.adaptee.type != Node.COMMENT_TAG
322:                            && newCh.adaptee.type != Node.TEXT_NODE
323:                            && newCh.adaptee.type != Node.CDATA_TAG) {
324:                        throw new DOMException(
325:                                DOMException.HIERARCHY_REQUEST_ERR,
326:                                "newChild cannot be a child of this node");
327:                    }
328:                }
329:                if (oldChild == null) {
330:                    throw new DOMException(DOMException.NOT_FOUND_ERR,
331:                            "oldChild not found");
332:                }
333:
334:                Node n;
335:                Node ref = this .adaptee.content;
336:                while (ref != null) {
337:                    if (ref.getAdapter() == oldChild) {
338:                        break;
339:                    }
340:                    ref = ref.next;
341:                }
342:                if (ref == null) {
343:                    throw new DOMException(DOMException.NOT_FOUND_ERR,
344:                            "oldChild not found");
345:                }
346:                newCh.adaptee.next = ref.next;
347:                newCh.adaptee.prev = ref.prev;
348:                newCh.adaptee.last = ref.last;
349:                newCh.adaptee.parent = ref.parent;
350:                newCh.adaptee.content = ref.content;
351:                if (ref.parent != null) {
352:                    if (ref.parent.content == ref) {
353:                        ref.parent.content = newCh.adaptee;
354:                    }
355:                    if (ref.parent.last == ref) {
356:                        ref.parent.last = newCh.adaptee;
357:                    }
358:                }
359:                if (ref.prev != null) {
360:                    ref.prev.next = newCh.adaptee;
361:                }
362:                if (ref.next != null) {
363:                    ref.next.prev = newCh.adaptee;
364:                }
365:                for (n = ref.content; n != null; n = n.next) {
366:                    if (n.parent == ref) {
367:                        n.parent = newCh.adaptee;
368:                    }
369:                }
370:
371:                return oldChild;
372:            }
373:
374:            /**
375:             * @see org.w3c.dom.Node#removeChild
376:             */
377:            public org.w3c.dom.Node removeChild(org.w3c.dom.Node oldChild) {
378:                if (oldChild == null) {
379:                    return null;
380:                }
381:
382:                Node ref = this .adaptee.content;
383:                while (ref != null) {
384:                    if (ref.getAdapter() == oldChild) {
385:                        break;
386:                    }
387:                    ref = ref.next;
388:                }
389:                if (ref == null) {
390:                    throw new DOMException(DOMException.NOT_FOUND_ERR,
391:                            "refChild not found");
392:                }
393:                Node.discardElement(ref);
394:
395:                if (this .adaptee.content == null
396:                        && this .adaptee.type == Node.START_TAG) {
397:                    this .adaptee.setType(Node.START_END_TAG);
398:                }
399:
400:                return oldChild;
401:            }
402:
403:            /**
404:             * @see org.w3c.dom.Node#appendChild
405:             */
406:            public org.w3c.dom.Node appendChild(org.w3c.dom.Node newChild) {
407:                // TODO - handle newChild already in tree
408:
409:                if (newChild == null) {
410:                    return null;
411:                }
412:                if (!(newChild instanceof  DOMNodeImpl)) {
413:                    throw new DOMException(DOMException.WRONG_DOCUMENT_ERR,
414:                            "newChild not instanceof DOMNodeImpl");
415:                }
416:                DOMNodeImpl newCh = (DOMNodeImpl) newChild;
417:
418:                if (this .adaptee.type == Node.ROOT_NODE) {
419:                    if (newCh.adaptee.type != Node.DOCTYPE_TAG
420:                            && newCh.adaptee.type != Node.PROC_INS_TAG) {
421:                        throw new DOMException(
422:                                DOMException.HIERARCHY_REQUEST_ERR,
423:                                "newChild cannot be a child of this node");
424:                    }
425:                } else if (this .adaptee.type == Node.START_TAG) {
426:                    if (newCh.adaptee.type != Node.START_TAG
427:                            && newCh.adaptee.type != Node.START_END_TAG
428:                            && newCh.adaptee.type != Node.COMMENT_TAG
429:                            && newCh.adaptee.type != Node.TEXT_NODE
430:                            && newCh.adaptee.type != Node.CDATA_TAG) {
431:                        throw new DOMException(
432:                                DOMException.HIERARCHY_REQUEST_ERR,
433:                                "newChild cannot be a child of this node");
434:                    }
435:                }
436:                this .adaptee.insertNodeAtEnd(newCh.adaptee);
437:
438:                if (this .adaptee.type == Node.START_END_TAG) {
439:                    this .adaptee.setType(Node.START_TAG);
440:                }
441:
442:                return newChild;
443:            }
444:
445:            /**
446:             * @see org.w3c.dom.Node#hasChildNodes
447:             */
448:            public boolean hasChildNodes() {
449:                return (adaptee.content != null);
450:            }
451:
452:            /**
453:             * @see org.w3c.dom.Node#cloneNode(boolean)
454:             */
455:            public org.w3c.dom.Node cloneNode(boolean deep) {
456:                Node node = adaptee.cloneNode(deep);
457:                node.parent = null;
458:                return node.getAdapter();
459:            }
460:
461:            /**
462:             * Do nothing: text nodes in html documents are important and jtidy already removes useless text during parsing.
463:             * @see org.w3c.dom.Node#normalize()
464:             */
465:            public void normalize() {
466:                // do nothing
467:            }
468:
469:            /**
470:             * DOM2 - not implemented.
471:             * @see #isSupported(java.lang.String, java.lang.String)
472:             */
473:            public boolean supports(String feature, String version) {
474:                return isSupported(feature, version);
475:            }
476:
477:            /**
478:             * @see org.w3c.dom.Node#getNamespaceURI()
479:             */
480:            public String getNamespaceURI() {
481:                return null;
482:            }
483:
484:            /**
485:             * @see org.w3c.dom.Node#getPrefix()
486:             */
487:            public String getPrefix() {
488:                return null;
489:            }
490:
491:            /**
492:             * @see org.w3c.dom.Node#setPrefix(java.lang.String)
493:             */
494:            public void setPrefix(String prefix) throws DOMException {
495:                // The namespace prefix of this node, or null if it is unspecified. When it is defined to be null, setting it
496:                // has no effect, including if the node is read-only.
497:                // do nothing
498:            }
499:
500:            /**
501:             * @see org.w3c.dom.Node#getLocalName()
502:             */
503:            public String getLocalName() {
504:                return getNodeName();
505:            }
506:
507:            /**
508:             * @see org.w3c.dom.Node#isSupported(java.lang.String, java.lang.String)
509:             */
510:            public boolean isSupported(String feature, String version) {
511:                return false;
512:            }
513:
514:            /**
515:             * @see org.w3c.dom.Node#hasAttributes
516:             */
517:            public boolean hasAttributes() {
518:                // contributed by dlp@users.sourceforge.net
519:                return this .adaptee.attributes != null;
520:            }
521:
522:            /**
523:             * @todo DOM level 3 compareDocumentPosition() Not implemented.
524:             * @see org.w3c.dom.Node#compareDocumentPosition(org.w3c.dom.Node)
525:             */
526:            public short compareDocumentPosition(org.w3c.dom.Node other)
527:                    throws DOMException {
528:                throw new DOMException(DOMException.NOT_SUPPORTED_ERR,
529:                        "DOM method not supported");
530:            }
531:
532:            /**
533:             * @todo DOM level 3 getBaseURI() Not implemented. Returns null.
534:             * @see org.w3c.dom.Node#getBaseURI()
535:             */
536:            public String getBaseURI() {
537:                return null;
538:            }
539:
540:            /**
541:             * @todo DOM level 3 getFeature() Not implemented. Returns null.
542:             * @see org.w3c.dom.Node#getFeature(java.lang.String, java.lang.String)
543:             */
544:            public Object getFeature(String feature, String version) {
545:                return null;
546:            }
547:
548:            /**
549:             * @todo DOM level 3 getTextContent() Not implemented. Returns null.
550:             * @see org.w3c.dom.Node#getTextContent()
551:             */
552:            public String getTextContent() throws DOMException {
553:                return null;
554:            }
555:
556:            /**
557:             * @todo DOM level 3 getUserData() Not implemented. Returns null.
558:             * @see org.w3c.dom.Node#getUserData(java.lang.String)
559:             */
560:            public Object getUserData(String key) {
561:                return null;
562:            }
563:
564:            /**
565:             * @see org.w3c.dom.Node#isDefaultNamespace(java.lang.String)
566:             */
567:            public boolean isDefaultNamespace(String namespaceURI) {
568:                return false;
569:            }
570:
571:            /**
572:             * @todo DOM level 3 isEqualNode() Not implemented. Returns false.
573:             * @see org.w3c.dom.Node#isEqualNode(org.w3c.dom.Node)
574:             */
575:            public boolean isEqualNode(org.w3c.dom.Node arg) {
576:                return false;
577:            }
578:
579:            /**
580:             * @todo DOM level 3 isSameNode() Not implemented. Returns false.
581:             * @see org.w3c.dom.Node#isSameNode(org.w3c.dom.Node)
582:             */
583:            public boolean isSameNode(org.w3c.dom.Node other) {
584:                return false;
585:            }
586:
587:            /**
588:             * @see org.w3c.dom.Node#lookupNamespaceURI(java.lang.String)
589:             */
590:            public String lookupNamespaceURI(String prefix) {
591:                return null;
592:            }
593:
594:            /**
595:             * @see org.w3c.dom.Node#lookupPrefix(java.lang.String)
596:             */
597:            public String lookupPrefix(String namespaceURI) {
598:                return null;
599:            }
600:
601:            /**
602:             * @todo DOM level 3 setTextContent() Not implemented. Throws NO_MODIFICATION_ALLOWED_ERR
603:             * @see org.w3c.dom.Node#setTextContent(java.lang.String)
604:             */
605:            public void setTextContent(String textContent) throws DOMException {
606:                throw new DOMException(
607:                        DOMException.NO_MODIFICATION_ALLOWED_ERR,
608:                        "Node is read only");
609:            }
610:
611:            /**
612:             * @todo DOM level 3 setUserData() Not implemented. Returns null.
613:             * @see org.w3c.dom.Node#setUserData(java.lang.String, java.lang.Object, org.w3c.dom.UserDataHandler)
614:             */
615:            public Object setUserData(String key, Object data,
616:                    UserDataHandler handler) {
617:                return null;
618:            }
619:        }
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