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1
21 package au.id.jericho.lib.html;
22
23 import java.util.*;
24
25
94 public abstract class TagType {
95 private final String  description;
96 private final String startDelimiter;
97 private final char[] startDelimiterCharArray;
98 private final String closingDelimiter;
99 private final boolean isServerTag;
100 private final String namePrefix;
101 final String startDelimiterPrefix;
102
103 TagType(final String description, final String startDelimiter, final String closingDelimiter, final boolean isServerTag, final String startDelimiterPrefix) {
104 this.description=description;
106 this.startDelimiter=startDelimiter;
107 startDelimiterCharArray=startDelimiter.toCharArray();
108 this.closingDelimiter=closingDelimiter;
109 this.isServerTag=isServerTag;
110 this.namePrefix=startDelimiter.substring(startDelimiterPrefix.length());
111 this.startDelimiterPrefix=startDelimiterPrefix;
112 }
113
114
122 public final void register() {
123 TagTypeRegister.add(this);
124 }
125
126
132 public final void deregister() {
133 TagTypeRegister.remove(this);
134 }
135
136
141 public static final List getRegisteredTagTypes() {
142 return TagTypeRegister.getList();
143 }
144
145
151 public final String getDescription() {
152 return description;
153 }
154
155
203 public final String getStartDelimiter() {
204 return startDelimiter;
205 }
206
207
256 public final String getClosingDelimiter() {
257 return closingDelimiter;
258 }
259
260
311 public final boolean isServerTag() {
312 return isServerTag;
313 }
314
315
364 protected final String getNamePrefix() {
365 return namePrefix;
366 }
367
368
403 protected boolean isValidPosition(final Source source, final int pos) {
404 if (isServerTag()) return true;
405 if (source.endOfLastTagIgnoringEnclosedMarkup!=-1) {
406 return pos>=source.endOfLastTagIgnoringEnclosedMarkup;
409 }
410 final TagType[] tagTypesIgnoringEnclosedMarkup=getTagTypesIgnoringEnclosedMarkup();
412 for (int i=0; i<tagTypesIgnoringEnclosedMarkup.length; i++)
413 if (tagTypesIgnoringEnclosedMarkup[i].tagEncloses(source,pos)) return false;
414 return true;
415 }
416
417
460 public static final TagType[] getTagTypesIgnoringEnclosedMarkup() {
461 return TagTypesIgnoringEnclosedMarkup.array;
462 }
463
464
472 public static final void setTagTypesIgnoringEnclosedMarkup(TagType[] tagTypes) {
473 if (tagTypes==null) throw new IllegalArgumentException ();
474 TagTypesIgnoringEnclosedMarkup.array=tagTypes;
475 }
476
477
501 protected abstract Tag constructTagAt(Source source, int pos);
502
503
516 protected final boolean tagEncloses(final Source source, final int pos) {
517 if (pos==0) return false;
518 final Tag enclosingTag=source.findEnclosingTag(pos-1,this); return enclosingTag!=null && pos!=enclosingTag.getEnd(); }
521
522
526 public String toString() {
527 return getDescription();
528 }
529
530 static final Tag getTagAt(final Source source, final int pos, final boolean assumeNoNestedTags) {
531 final TagTypeRegister.ProspectiveTagTypeIterator prospectiveTagTypeIterator=new TagTypeRegister.ProspectiveTagTypeIterator(source,pos);
532 while (prospectiveTagTypeIterator.hasNext()) {
534 final TagType tagType=prospectiveTagTypeIterator.getNextTagType();
535 if (assumeNoNestedTags || tagType.isValidPosition(source,pos)) {
536 try {
537 final Tag tag=tagType.constructTagAt(source,pos);
538 if (tag!=null) return tag;
539 } catch (IndexOutOfBoundsException ex) {
540 if (source.isLoggingEnabled()) source.log(source.getRowColumnVector(pos).appendTo(new StringBuffer (200).append("Tag at ")).append(" not recognised as type '").append(tagType.getDescription()).append("' because it has no end delimiter").toString());
541 }
542 }
543 }
544 return null;
545 }
546
547 final String getNamePrefixForTagConstant() {
548 return getNamePrefix();
550 }
551
552 final char[] getStartDelimiterCharArray() {
553 return startDelimiterCharArray;
554 }
555
556 private static final class TagTypesIgnoringEnclosedMarkup {
557 public static TagType[] array=new TagType[] {
560 StartTagType.COMMENT,
561 StartTagType.CDATA_SECTION
562 };
563 }
564 }
565 |
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