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annotate src/goodjava/bbcode/BBCode.java @ 1831:8f9ae295bf6a default tip
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| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Thu, 26 Sep 2024 15:07:45 -0600 |
| parents | 6c9aea554691 |
| children |
| rev | line source |
|---|---|
| 1702 | 1 package goodjava.bbcode; |
| 585 | 2 |
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3 import java.util.List; |
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4 import java.util.ArrayList; |
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5 import java.util.Map; |
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6 import java.util.LinkedHashMap; |
| 1703 | 7 import java.util.regex.Pattern; |
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8 import goodjava.parser.Parser; |
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9 |
| 585 | 10 |
| 11 public final class BBCode { | |
| 12 | |
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13 private static final Pattern tagPtn = Pattern.compile( |
| 1737 | 14 "\\[(/?[a-zA-Z_]+(=[^ \\n\\t\\[\\]]*)?)\\]" |
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15 ); |
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16 |
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17 public static String encode(String s) { |
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18 return tagPtn.matcher(s).replaceAll("[brackets]$1[/brackets]"); |
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19 } |
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20 |
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21 |
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22 public final class Element { |
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23 public final String name; |
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24 public final String param; |
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25 public final Object contents; // String, Element, or List |
| 585 | 26 |
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27 private Element(String name,String param,Object contents) { |
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28 this.name = name.toLowerCase(); |
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29 this.param = param; |
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30 this.contents = contents; |
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31 } |
| 585 | 32 } |
| 33 | |
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34 public static Object parse(String text) { |
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35 if( text.indexOf('[') == -1 ) |
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36 return text; |
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37 return new BBCode(text).parse(); |
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38 } |
| 585 | 39 |
| 1702 | 40 private final Parser parser; |
| 41 | |
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42 private BBCode(String text) { |
| 585 | 43 this.parser = new Parser(text); |
| 44 } | |
| 45 | |
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46 private Object parse() { |
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47 List list = new ArrayList(); |
| 1247 | 48 StringBuilder text = new StringBuilder(); |
| 585 | 49 while( !parser.endOfInput() ) { |
| 1737 | 50 Element block = parseBlock(); |
| 1247 | 51 if( block != null ) { |
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52 add(list,text); |
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53 list.add( block ); |
| 1247 | 54 } else { |
| 55 text.append( parser.currentChar() ); | |
| 585 | 56 parser.anyChar(); |
| 57 } | |
| 58 } | |
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59 add(list,text); |
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60 return list.size()==1 ? list.get(0) : list; |
| 585 | 61 } |
| 62 | |
| 1711 | 63 private Object parseUntil(String end) { |
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64 List list = new ArrayList(); |
| 1247 | 65 StringBuilder text = new StringBuilder(); |
| 1711 | 66 while( !parser.matchIgnoreCase(end) ) { |
| 67 if( parser.endOfInput() ) | |
| 68 return null; | |
| 1737 | 69 Element block = parseBlock(); |
| 585 | 70 if( block != null ) { |
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71 add(list,text); |
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72 list.add( block ); |
| 1711 | 73 } else { |
| 74 text.append( parser.currentChar() ); | |
| 75 parser.anyChar(); | |
| 585 | 76 } |
| 77 } | |
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78 add(list,text); |
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79 return list.size()==1 ? list.get(0) : list; |
| 585 | 80 } |
| 81 | |
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82 private void add(List list,StringBuilder text) { |
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83 if( text.length() > 0 ) { |
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84 list.add( text.toString() ); |
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85 text.setLength(0); |
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86 } |
| 1247 | 87 } |
| 88 | |
| 1737 | 89 private Element parseBlock() { |
| 585 | 90 if( parser.currentChar() != '[' ) |
| 91 return null; | |
| 1737 | 92 parser.begin(); |
| 93 parser.anyChar(); // [ | |
| 94 int start = parser.currentIndex(); | |
| 95 if( !matchTagChar() ) | |
| 96 return parser.failure(null); | |
| 97 while(matchTagChar()); | |
| 98 String name = parser.textFrom(start).toLowerCase(); | |
| 99 String param = null; | |
| 100 if( parser.match('=') ) { | |
| 101 start = parser.currentIndex(); | |
| 102 while( parser.noneOf("[]\n") ); | |
| 103 param = parser.textFrom(start); | |
| 1711 | 104 } |
| 1737 | 105 if( !parser.match(']') ) |
| 585 | 106 return parser.failure(null); |
| 1737 | 107 Object content = parseUntil("[/"+name+"]"); |
| 1711 | 108 if( content==null ) |
| 585 | 109 return parser.failure(null); |
| 1737 | 110 Element rtn = new Element(name,param,content); |
| 585 | 111 return parser.success(rtn); |
| 112 } | |
| 113 | |
| 1737 | 114 private boolean matchTagChar() { |
| 115 return parser.inCharRange('a','z') | |
| 585 | 116 || parser.inCharRange('A','Z') |
| 1737 | 117 || parser.inCharRange('0','9') |
| 118 || parser.match('_') | |
| 119 ; | |
| 1711 | 120 } |
| 121 | |
| 585 | 122 } |