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21 package au.id.jericho.lib.html;
22
23 import java.util.*;
24
25
220 public final class Element extends Segment implements HTMLElementName {
221 private final StartTag startTag;
222 private final EndTag endTag;
223 private Segment content=null;
224 Element parentElement=Element.NOT_CACHED;
225 private int depth=-1;
226
227 static final Element NOT_CACHED=new Element();
228
229 Element(final Source source, final StartTag startTag, final EndTag endTag) {
230 super(source, startTag.begin, endTag==null ? startTag.end : endTag.end);
231 this.startTag=startTag;
232 this.endTag=(endTag==null || endTag.length()==0) ? null : endTag;
233 }
234
235 private Element() {
236 startTag=null;
237 endTag=null;
238 }
239
240
253 public Element getParentElement() {
254 if (parentElement==Element.NOT_CACHED) {
255 source.getChildElements();
256 if (parentElement==Element.NOT_CACHED) parentElement=null;
257 }
258 return parentElement;
259 }
260
261
271 public final List getChildElements() {
272 return childElements!=null ? childElements : getChildElements(-1);
273 }
274
275 final List getChildElements(int depth) {
276 if (depth!=-1) this.depth=depth;
277 if (childElements==null) {
278 if (!Config.IncludeServerTagsInElementHierarchy && end==startTag.end) {
279 childElements=Collections.EMPTY_LIST;
280 } else {
281 final int childDepth=(depth==-1 ? -1 : depth+1);
282 childElements=new ArrayList();
283 int pos=Config.IncludeServerTagsInElementHierarchy ? begin+1 : startTag.end;
284 final int maxChildBegin=(Config.IncludeServerTagsInElementHierarchy || endTag==null) ? end : endTag.begin;
285 while (true) {
286 final StartTag childStartTag=source.findNextStartTag(pos);
287 if (childStartTag==null || childStartTag.begin>=maxChildBegin) break;
288 if (Config.IncludeServerTagsInElementHierarchy) {
289 if (childStartTag.begin<startTag.end && !childStartTag.getTagType().isServerTag() && !startTag.getTagType().isServerTag()) {
290 pos=childStartTag.end;
294 continue;
295 }
296 } else if (childStartTag.getTagType().isServerTag()) {
297 pos=childStartTag.end;
298 continue;
299 }
300 final Element childElement=childStartTag.getElement();
301 childElement.parentElement=this;
302 if (childElement.end>end && source.isLoggingEnabled()) source.log("Child element "+childElement.getDebugInfo()+" extends beyond end of parent "+getDebugInfo());
303 childElements.add(childElement);
304 childElement.getChildElements(childDepth);
305 pos=childElement.end;
306 }
307 }
308 }
309 return childElements;
310 }
311
312
327 public int getDepth() {
328 if (depth==-1) {
329 getParentElement();
330 if (depth==-1) depth=0;
331 }
332 return depth;
333 }
334
335
346 public Segment getContent() {
347 if (content==null) content=new Segment(source,startTag.end,getContentEnd());
348 return content;
349 }
350
351
355 public StartTag getStartTag() {
356 return startTag;
357 }
358
359
366 public EndTag getEndTag() {
367 return endTag;
368 }
369
370
379 public String  getName() {
380 return startTag.getName();
381 }
382
383
400 public boolean isEmpty() {
401 return startTag.end==getContentEnd();
402 }
403
404
424 public boolean isEmptyElementTag() {
425 return isEmpty() && startTag.isEmptyElementTag();
426 }
427
428
436 public Attributes getAttributes() {
437 return getStartTag().getAttributes();
438 }
439
440
452 public String getAttributeValue(final String attributeName) {
453 return getStartTag().getAttributeValue(attributeName);
454 }
455
456
460 public FormControl getFormControl() {
461 return FormControl.construct(this);
462 }
463
464 public String getDebugInfo() {
465 if (this==NOT_CACHED) return "NOT_CACHED";
466 final StringBuffer sb=new StringBuffer ();
467 sb.append("Element ").append(super.getDebugInfo()).append(": ");
468 startTag.appendStartTagDebugInfo(sb);
469 sb.append(endTag==null ? "(no end tag)" : "(with end tag)");
470 return sb.toString();
471 }
472
473
483 public String getContentText() {
484 return isEmpty() ? null : toString();
485 }
486
487
497 public static boolean isBlock(final String elementName) {
498 return HTMLElements.getBlockLevelElementNames().contains(elementName.toLowerCase());
499 }
500
501
511 public static boolean isInline(final String elementName) {
512 return HTMLElements.getInlineLevelElementNames().contains(elementName.toLowerCase());
513 }
514
515 int getContentEnd() {
516 return endTag!=null ? endTag.begin : end;
517 }
518 }
519
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