Mercurial Hosting > luan
annotate src/luan/modules/parsers/BBCode.java @ 1111:88b5b81cad4a
move Parser to luan.lib.parser
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Wed, 02 Aug 2017 15:19:47 -0600 |
| parents | 1460d297e960 |
| children | 728d8e75f476 |
| rev | line source |
|---|---|
| 585 | 1 package luan.modules.parsers; |
| 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 luan.Luan; |
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6 import luan.LuanState; |
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7 import luan.LuanFunction; |
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8 import luan.LuanException; |
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9 import luan.modules.Utils; |
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10 import luan.lib.parser.Parser; |
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11 |
| 585 | 12 |
| 13 public final class BBCode { | |
| 14 | |
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15 public static String toHtml(LuanState luan,String bbcode,LuanFunction quoter) throws LuanException { |
| 638 | 16 return new BBCode(luan,bbcode,quoter,true).parse(); |
| 585 | 17 } |
| 18 | |
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19 public static String toText(LuanState luan,String bbcode,LuanFunction quoter) throws LuanException { |
| 638 | 20 return new BBCode(luan,bbcode,quoter,false).parse(); |
| 585 | 21 } |
| 22 | |
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23 private final LuanState luan; |
| 585 | 24 private final Parser parser; |
| 638 | 25 private final LuanFunction quoter; |
| 585 | 26 private final boolean toHtml; |
| 27 | |
| 638 | 28 private BBCode(LuanState luan,String text,LuanFunction quoter,boolean toHtml) throws LuanException { |
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29 Utils.checkNotNull(text,1); |
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30 // Utils.checkNotNull(quoter,2); |
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31 this.luan = luan; |
| 585 | 32 this.parser = new Parser(text); |
| 638 | 33 this.quoter = quoter; |
| 585 | 34 this.toHtml = toHtml; |
| 35 } | |
| 36 | |
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37 private String parse() throws LuanException { |
| 585 | 38 StringBuilder sb = new StringBuilder(); |
| 39 while( !parser.endOfInput() ) { | |
| 40 String block = parseBlock(); | |
| 41 if( block != null ) | |
| 42 sb.append(block); | |
| 43 else { | |
| 44 sb.append( parser.currentChar() ); | |
| 45 parser.anyChar(); | |
| 46 } | |
| 47 } | |
| 48 return sb.toString(); | |
| 49 } | |
| 50 | |
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51 private String parseWellFormed() throws LuanException { |
| 585 | 52 StringBuilder sb = new StringBuilder(); |
| 53 while( !parser.endOfInput() ) { | |
| 54 String block = parseBlock(); | |
| 55 if( block != null ) { | |
| 56 sb.append(block); | |
| 57 continue; | |
| 58 } | |
| 59 if( couldBeTag() ) | |
| 60 break; | |
| 61 sb.append( parser.currentChar() ); | |
| 62 parser.anyChar(); | |
| 63 } | |
| 64 return sb.toString(); | |
| 65 } | |
| 66 | |
| 67 private boolean couldBeTag() { | |
| 68 if( parser.currentChar() != '[' ) | |
| 69 return false; | |
| 70 return parser.testIgnoreCase("[b]") | |
| 71 || parser.testIgnoreCase("[/b]") | |
| 72 || parser.testIgnoreCase("[i]") | |
| 73 || parser.testIgnoreCase("[/i]") | |
| 74 || parser.testIgnoreCase("[u]") | |
| 75 || parser.testIgnoreCase("[/u]") | |
| 76 || parser.testIgnoreCase("[url]") | |
| 77 || parser.testIgnoreCase("[url=") | |
| 78 || parser.testIgnoreCase("[/url]") | |
| 79 || parser.testIgnoreCase("[code]") | |
| 80 || parser.testIgnoreCase("[/code]") | |
| 81 || parser.testIgnoreCase("[img]") | |
| 82 || parser.testIgnoreCase("[/img]") | |
| 83 || parser.testIgnoreCase("[color=") | |
| 84 || parser.testIgnoreCase("[/color]") | |
| 85 || parser.testIgnoreCase("[size=") | |
| 86 || parser.testIgnoreCase("[/size]") | |
| 87 || parser.testIgnoreCase("[youtube]") | |
| 88 || parser.testIgnoreCase("[/youtube]") | |
| 89 || parser.testIgnoreCase("[quote]") | |
| 90 || parser.testIgnoreCase("[quote=") | |
| 91 || parser.testIgnoreCase("[/quote]") | |
| 92 ; | |
| 93 } | |
| 94 | |
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95 private String parseBlock() throws LuanException { |
| 585 | 96 if( parser.currentChar() != '[' ) |
| 97 return null; | |
| 98 String s; | |
| 99 s = parseB(); if(s!=null) return s; | |
| 100 s = parseI(); if(s!=null) return s; | |
| 101 s = parseU(); if(s!=null) return s; | |
| 102 s = parseUrl1(); if(s!=null) return s; | |
| 103 s = parseUrl2(); if(s!=null) return s; | |
| 104 s = parseCode(); if(s!=null) return s; | |
| 105 s = parseImg(); if(s!=null) return s; | |
| 106 s = parseColor(); if(s!=null) return s; | |
| 107 s = parseSize(); if(s!=null) return s; | |
| 108 s = parseYouTube(); if(s!=null) return s; | |
| 109 s = parseQuote1(); if(s!=null) return s; | |
| 110 s = parseQuote2(); if(s!=null) return s; | |
| 111 return null; | |
| 112 } | |
| 113 | |
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114 private String parseB() throws LuanException { |
| 585 | 115 parser.begin(); |
| 116 if( !parser.matchIgnoreCase("[b]") ) | |
| 117 return parser.failure(null); | |
| 118 String content = parseWellFormed(); | |
| 119 if( !parser.matchIgnoreCase("[/b]") ) | |
| 120 return parser.failure(null); | |
| 121 String rtn = toHtml ? "<b>"+content+"</b>" : content; | |
| 122 return parser.success(rtn); | |
| 123 } | |
| 124 | |
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125 private String parseI() throws LuanException { |
| 585 | 126 parser.begin(); |
| 127 if( !parser.matchIgnoreCase("[i]") ) | |
| 128 return parser.failure(null); | |
| 129 String content = parseWellFormed(); | |
| 130 if( !parser.matchIgnoreCase("[/i]") ) | |
| 131 return parser.failure(null); | |
| 132 String rtn = toHtml ? "<i>"+content+"</i>" : content; | |
| 133 return parser.success(rtn); | |
| 134 } | |
| 135 | |
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136 private String parseU() throws LuanException { |
| 585 | 137 parser.begin(); |
| 138 if( !parser.matchIgnoreCase("[u]") ) | |
| 139 return parser.failure(null); | |
| 140 String content = parseWellFormed(); | |
| 141 if( !parser.matchIgnoreCase("[/u]") ) | |
| 142 return parser.failure(null); | |
| 143 String rtn = toHtml ? "<u>"+content+"</u>" : content; | |
| 144 return parser.success(rtn); | |
| 145 } | |
| 146 | |
| 147 private String parseUrl1() { | |
| 148 parser.begin(); | |
| 149 if( !parser.matchIgnoreCase("[url]") ) | |
| 150 return parser.failure(null); | |
| 151 String url = parseRealUrl(); | |
| 152 if( !parser.matchIgnoreCase("[/url]") ) | |
| 153 return parser.failure(null); | |
| 154 String rtn = toHtml ? "<a href='"+url+"'>"+url+"</u>" : url; | |
| 155 return parser.success(rtn); | |
| 156 } | |
| 157 | |
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158 private String parseUrl2() throws LuanException { |
| 585 | 159 parser.begin(); |
| 160 if( !parser.matchIgnoreCase("[url=") ) | |
| 161 return parser.failure(null); | |
| 162 String url = parseRealUrl(); | |
| 163 if( !parser.match(']') ) | |
| 164 return parser.failure(null); | |
| 165 String content = parseWellFormed(); | |
| 166 if( !parser.matchIgnoreCase("[/url]") ) | |
| 167 return parser.failure(null); | |
| 168 String rtn = toHtml ? "<a href='"+url+"'>"+content+"</u>" : content; | |
| 169 return parser.success(rtn); | |
| 170 } | |
| 171 | |
| 172 private String parseRealUrl() { | |
| 173 parser.begin(); | |
| 174 while( parser.match(' ') ); | |
| 175 int start = parser.currentIndex(); | |
| 176 if( !parser.matchIgnoreCase("http") ) | |
| 177 return parser.failure(null); | |
| 178 parser.matchIgnoreCase("s"); | |
| 179 if( !parser.matchIgnoreCase("://") ) | |
| 180 return parser.failure(null); | |
| 181 while( parser.noneOf(" []'") ); | |
| 182 String url = parser.textFrom(start); | |
| 183 while( parser.match(' ') ); | |
| 184 return parser.success(url); | |
| 185 } | |
| 186 | |
| 187 private String parseCode() { | |
| 188 parser.begin(); | |
| 189 if( !parser.matchIgnoreCase("[code]") ) | |
| 190 return parser.failure(null); | |
| 191 int start = parser.currentIndex(); | |
| 192 while( !parser.testIgnoreCase("[/code]") ) { | |
| 193 if( !parser.anyChar() ) | |
| 194 return parser.failure(null); | |
| 195 } | |
| 196 String content = parser.textFrom(start); | |
| 197 if( !parser.matchIgnoreCase("[/code]") ) throw new RuntimeException(); | |
| 198 String rtn = toHtml ? "<code>"+content+"</code>" : content; | |
| 199 return parser.success(rtn); | |
| 200 } | |
| 201 | |
| 202 private String parseImg() { | |
| 203 parser.begin(); | |
| 204 if( !parser.matchIgnoreCase("[img]") ) | |
| 205 return parser.failure(null); | |
| 206 String url = parseRealUrl(); | |
| 207 if( !parser.matchIgnoreCase("[/img]") ) | |
| 208 return parser.failure(null); | |
| 209 String rtn = toHtml ? "<img src='"+url+"'>" : ""; | |
| 210 return parser.success(rtn); | |
| 211 } | |
| 212 | |
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213 private String parseColor() throws LuanException { |
| 585 | 214 parser.begin(); |
| 215 if( !parser.matchIgnoreCase("[color=") ) | |
| 216 return parser.failure(null); | |
| 217 int start = parser.currentIndex(); | |
| 218 parser.match('#'); | |
| 219 while( parser.inCharRange('0','9') | |
| 220 || parser.inCharRange('a','z') | |
| 221 || parser.inCharRange('A','Z') | |
| 222 ); | |
| 223 String color = parser.textFrom(start); | |
| 224 if( !parser.match(']') ) | |
| 225 return parser.failure(null); | |
| 226 String content = parseWellFormed(); | |
| 227 if( !parser.matchIgnoreCase("[/color]") ) | |
| 228 return parser.failure(null); | |
| 229 String rtn = toHtml ? "<span style='color: "+color+"'>"+content+"</span>" : content; | |
| 230 return parser.success(rtn); | |
| 231 } | |
| 232 | |
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233 private String parseSize() throws LuanException { |
| 585 | 234 parser.begin(); |
| 235 if( !parser.matchIgnoreCase("[size=") ) | |
| 236 return parser.failure(null); | |
| 237 int start = parser.currentIndex(); | |
| 238 while( parser.match('.') || parser.inCharRange('0','9') ); | |
| 239 String size = parser.textFrom(start); | |
| 240 if( !parser.match(']') ) | |
| 241 return parser.failure(null); | |
| 242 String content = parseWellFormed(); | |
| 243 if( !parser.matchIgnoreCase("[/size]") ) | |
| 244 return parser.failure(null); | |
| 245 String rtn = toHtml ? "<span style='font-size: "+size+"em'>"+content+"</span>" : content; | |
| 246 return parser.success(rtn); | |
| 247 } | |
| 248 | |
| 249 private String parseYouTube() { | |
| 250 parser.begin(); | |
| 251 if( !parser.matchIgnoreCase("[youtube]") ) | |
| 252 return parser.failure(null); | |
| 253 int start = parser.currentIndex(); | |
| 254 while( parser.inCharRange('0','9') | |
| 255 || parser.inCharRange('a','z') | |
| 256 || parser.inCharRange('A','Z') | |
| 257 || parser.match('-') | |
| 258 || parser.match('_') | |
| 259 ); | |
| 260 String id = parser.textFrom(start); | |
| 261 if( id.length()==0 || !parser.matchIgnoreCase("[/youtube]") ) | |
| 262 return parser.failure(null); | |
| 263 String rtn = toHtml ? "<iframe width='420' height='315' src='https://www.youtube.com/embed/"+id+"' frameborder='0' allowfullscreen></iframe>" : ""; | |
| 264 return parser.success(rtn); | |
| 265 } | |
| 266 | |
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267 private String quote(Object... args) throws LuanException { |
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268 if( quoter==null ) |
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269 throw new LuanException("BBCode quoter function not defined"); |
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270 Object obj = quoter.call(luan,args); |
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271 if( !(obj instanceof String) ) |
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272 throw new LuanException("BBCode quoter function returned "+Luan.type(obj)+" but string required"); |
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273 return (String)obj; |
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274 } |
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275 |
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276 private String parseQuote1() throws LuanException { |
| 585 | 277 parser.begin(); |
| 278 if( !parser.matchIgnoreCase("[quote]") ) | |
| 279 return parser.failure(null); | |
| 280 String content = parseWellFormed(); | |
| 281 if( !parser.matchIgnoreCase("[/quote]") ) | |
| 282 return parser.failure(null); | |
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283 String rtn = quote(content); |
| 585 | 284 return parser.success(rtn); |
| 285 } | |
| 286 | |
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287 private String parseQuote2() throws LuanException { |
| 585 | 288 parser.begin(); |
| 289 if( !parser.matchIgnoreCase("[quote=") ) | |
| 290 return parser.failure(null); | |
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291 List args = new ArrayList(); |
| 585 | 292 int start = parser.currentIndex(); |
| 293 while( parser.noneOf("[];") ); | |
| 294 String name = parser.textFrom(start).trim(); | |
| 295 if( name.length() == 0 ) | |
| 296 return parser.failure(null); | |
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297 args.add(name); |
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298 while( parser.match(';') ) { |
| 585 | 299 start = parser.currentIndex(); |
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300 while( parser.noneOf("[];'") ); |
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301 String src = parser.textFrom(start).trim(); |
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302 args.add(src); |
| 585 | 303 } |
| 304 if( !parser.match(']') ) | |
| 305 return parser.failure(null); | |
| 306 String content = parseWellFormed(); | |
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307 args.add(0,content); |
| 585 | 308 if( !parser.matchIgnoreCase("[/quote]") ) |
| 309 return parser.failure(null); | |
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310 String rtn = quote(args.toArray()); |
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311 return parser.success(rtn); |
| 585 | 312 } |
| 313 | |
| 314 } |