Mercurial Hosting > luan
annotate src/luan/modules/parsers/BBCode.java @ 1335:e0cf0d108a77
major cleanup
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Thu, 14 Feb 2019 03:10:45 -0700 |
| parents | 25746915a241 |
| children | 27efb1fcbcb5 |
| 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.LuanFunction; |
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7 import luan.LuanException; |
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8 import luan.modules.Utils; |
| 1247 | 9 import luan.modules.HtmlLuan; |
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10 import luan.lib.parser.Parser; |
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11 |
| 585 | 12 |
| 13 public final class BBCode { | |
| 14 | |
| 1335 | 15 public static String toHtml(String bbcode,LuanFunction quoter) throws LuanException { |
| 16 return new BBCode(bbcode,quoter,true).parse(); | |
| 585 | 17 } |
| 18 | |
| 1335 | 19 public static String toText(String bbcode,LuanFunction quoter) throws LuanException { |
| 20 return new BBCode(bbcode,quoter,false).parse(); | |
| 585 | 21 } |
| 22 | |
| 23 private final Parser parser; | |
| 638 | 24 private final LuanFunction quoter; |
| 585 | 25 private final boolean toHtml; |
| 26 | |
| 1335 | 27 private BBCode(String text,LuanFunction quoter,boolean toHtml) throws LuanException { |
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28 Utils.checkNotNull(text,1); |
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29 // Utils.checkNotNull(quoter,2); |
| 585 | 30 this.parser = new Parser(text); |
| 638 | 31 this.quoter = quoter; |
| 585 | 32 this.toHtml = toHtml; |
| 33 } | |
| 34 | |
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35 private String parse() throws LuanException { |
| 585 | 36 StringBuilder sb = new StringBuilder(); |
| 1247 | 37 StringBuilder text = new StringBuilder(); |
| 585 | 38 while( !parser.endOfInput() ) { |
| 39 String block = parseBlock(); | |
| 1247 | 40 if( block != null ) { |
| 41 sb.append( textToString(text) ); | |
| 585 | 42 sb.append(block); |
| 1247 | 43 } else { |
| 44 text.append( parser.currentChar() ); | |
| 585 | 45 parser.anyChar(); |
| 46 } | |
| 47 } | |
| 1247 | 48 sb.append( textToString(text) ); |
| 585 | 49 return sb.toString(); |
| 50 } | |
| 51 | |
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52 private String parseWellFormed() throws LuanException { |
| 585 | 53 StringBuilder sb = new StringBuilder(); |
| 1247 | 54 StringBuilder text = new StringBuilder(); |
| 585 | 55 while( !parser.endOfInput() ) { |
| 56 String block = parseBlock(); | |
| 57 if( block != null ) { | |
| 1247 | 58 sb.append( textToString(text) ); |
| 585 | 59 sb.append(block); |
| 60 continue; | |
| 61 } | |
| 62 if( couldBeTag() ) | |
| 63 break; | |
| 1247 | 64 text.append( parser.currentChar() ); |
| 585 | 65 parser.anyChar(); |
| 66 } | |
| 1247 | 67 sb.append( textToString(text) ); |
| 585 | 68 return sb.toString(); |
| 69 } | |
| 70 | |
| 1247 | 71 private String textToString(StringBuilder text) throws LuanException { |
| 72 String s = text.toString(); | |
| 73 text.setLength(0); | |
| 74 if( toHtml ) | |
| 75 s = HtmlLuan.encode(s); | |
| 76 return s; | |
| 77 } | |
| 78 | |
| 585 | 79 private boolean couldBeTag() { |
| 80 if( parser.currentChar() != '[' ) | |
| 81 return false; | |
| 82 return parser.testIgnoreCase("[b]") | |
| 83 || parser.testIgnoreCase("[/b]") | |
| 84 || parser.testIgnoreCase("[i]") | |
| 85 || parser.testIgnoreCase("[/i]") | |
| 86 || parser.testIgnoreCase("[u]") | |
| 87 || parser.testIgnoreCase("[/u]") | |
| 88 || parser.testIgnoreCase("[url]") | |
| 89 || parser.testIgnoreCase("[url=") | |
| 90 || parser.testIgnoreCase("[/url]") | |
| 91 || parser.testIgnoreCase("[code]") | |
| 92 || parser.testIgnoreCase("[/code]") | |
| 93 || parser.testIgnoreCase("[img]") | |
| 94 || parser.testIgnoreCase("[/img]") | |
| 95 || parser.testIgnoreCase("[color=") | |
| 96 || parser.testIgnoreCase("[/color]") | |
| 97 || parser.testIgnoreCase("[size=") | |
| 98 || parser.testIgnoreCase("[/size]") | |
| 99 || parser.testIgnoreCase("[youtube]") | |
| 100 || parser.testIgnoreCase("[/youtube]") | |
| 101 || parser.testIgnoreCase("[quote]") | |
| 102 || parser.testIgnoreCase("[quote=") | |
| 103 || parser.testIgnoreCase("[/quote]") | |
| 104 ; | |
| 105 } | |
| 106 | |
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107 private String parseBlock() throws LuanException { |
| 585 | 108 if( parser.currentChar() != '[' ) |
| 109 return null; | |
| 110 String s; | |
| 111 s = parseB(); if(s!=null) return s; | |
| 112 s = parseI(); if(s!=null) return s; | |
| 113 s = parseU(); if(s!=null) return s; | |
| 114 s = parseUrl1(); if(s!=null) return s; | |
| 115 s = parseUrl2(); if(s!=null) return s; | |
| 116 s = parseCode(); if(s!=null) return s; | |
| 117 s = parseImg(); if(s!=null) return s; | |
| 118 s = parseColor(); if(s!=null) return s; | |
| 119 s = parseSize(); if(s!=null) return s; | |
| 120 s = parseYouTube(); if(s!=null) return s; | |
| 121 s = parseQuote1(); if(s!=null) return s; | |
| 122 s = parseQuote2(); if(s!=null) return s; | |
| 123 return null; | |
| 124 } | |
| 125 | |
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126 private String parseB() throws LuanException { |
| 585 | 127 parser.begin(); |
| 128 if( !parser.matchIgnoreCase("[b]") ) | |
| 129 return parser.failure(null); | |
| 130 String content = parseWellFormed(); | |
| 131 if( !parser.matchIgnoreCase("[/b]") ) | |
| 132 return parser.failure(null); | |
| 133 String rtn = toHtml ? "<b>"+content+"</b>" : content; | |
| 134 return parser.success(rtn); | |
| 135 } | |
| 136 | |
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137 private String parseI() throws LuanException { |
| 585 | 138 parser.begin(); |
| 139 if( !parser.matchIgnoreCase("[i]") ) | |
| 140 return parser.failure(null); | |
| 141 String content = parseWellFormed(); | |
| 142 if( !parser.matchIgnoreCase("[/i]") ) | |
| 143 return parser.failure(null); | |
| 144 String rtn = toHtml ? "<i>"+content+"</i>" : content; | |
| 145 return parser.success(rtn); | |
| 146 } | |
| 147 | |
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148 private String parseU() throws LuanException { |
| 585 | 149 parser.begin(); |
| 150 if( !parser.matchIgnoreCase("[u]") ) | |
| 151 return parser.failure(null); | |
| 152 String content = parseWellFormed(); | |
| 153 if( !parser.matchIgnoreCase("[/u]") ) | |
| 154 return parser.failure(null); | |
| 155 String rtn = toHtml ? "<u>"+content+"</u>" : content; | |
| 156 return parser.success(rtn); | |
| 157 } | |
| 158 | |
| 159 private String parseUrl1() { | |
| 160 parser.begin(); | |
| 161 if( !parser.matchIgnoreCase("[url]") ) | |
| 162 return parser.failure(null); | |
| 163 String url = parseRealUrl(); | |
| 164 if( !parser.matchIgnoreCase("[/url]") ) | |
| 165 return parser.failure(null); | |
| 166 String rtn = toHtml ? "<a href='"+url+"'>"+url+"</u>" : url; | |
| 167 return parser.success(rtn); | |
| 168 } | |
| 169 | |
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170 private String parseUrl2() throws LuanException { |
| 585 | 171 parser.begin(); |
| 172 if( !parser.matchIgnoreCase("[url=") ) | |
| 173 return parser.failure(null); | |
| 174 String url = parseRealUrl(); | |
| 175 if( !parser.match(']') ) | |
| 176 return parser.failure(null); | |
| 177 String content = parseWellFormed(); | |
| 178 if( !parser.matchIgnoreCase("[/url]") ) | |
| 179 return parser.failure(null); | |
| 180 String rtn = toHtml ? "<a href='"+url+"'>"+content+"</u>" : content; | |
| 181 return parser.success(rtn); | |
| 182 } | |
| 183 | |
| 184 private String parseRealUrl() { | |
| 185 parser.begin(); | |
| 186 while( parser.match(' ') ); | |
| 187 int start = parser.currentIndex(); | |
| 188 if( !parser.matchIgnoreCase("http") ) | |
| 189 return parser.failure(null); | |
| 190 parser.matchIgnoreCase("s"); | |
| 191 if( !parser.matchIgnoreCase("://") ) | |
| 192 return parser.failure(null); | |
| 193 while( parser.noneOf(" []'") ); | |
| 194 String url = parser.textFrom(start); | |
| 195 while( parser.match(' ') ); | |
| 196 return parser.success(url); | |
| 197 } | |
| 198 | |
| 199 private String parseCode() { | |
| 200 parser.begin(); | |
| 201 if( !parser.matchIgnoreCase("[code]") ) | |
| 202 return parser.failure(null); | |
| 203 int start = parser.currentIndex(); | |
| 204 while( !parser.testIgnoreCase("[/code]") ) { | |
| 205 if( !parser.anyChar() ) | |
| 206 return parser.failure(null); | |
| 207 } | |
| 208 String content = parser.textFrom(start); | |
| 209 if( !parser.matchIgnoreCase("[/code]") ) throw new RuntimeException(); | |
| 210 String rtn = toHtml ? "<code>"+content+"</code>" : content; | |
| 211 return parser.success(rtn); | |
| 212 } | |
| 213 | |
| 214 private String parseImg() { | |
| 215 parser.begin(); | |
| 216 if( !parser.matchIgnoreCase("[img]") ) | |
| 217 return parser.failure(null); | |
| 218 String url = parseRealUrl(); | |
| 219 if( !parser.matchIgnoreCase("[/img]") ) | |
| 220 return parser.failure(null); | |
| 221 String rtn = toHtml ? "<img src='"+url+"'>" : ""; | |
| 222 return parser.success(rtn); | |
| 223 } | |
| 224 | |
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225 private String parseColor() throws LuanException { |
| 585 | 226 parser.begin(); |
| 227 if( !parser.matchIgnoreCase("[color=") ) | |
| 228 return parser.failure(null); | |
| 229 int start = parser.currentIndex(); | |
| 230 parser.match('#'); | |
| 231 while( parser.inCharRange('0','9') | |
| 232 || parser.inCharRange('a','z') | |
| 233 || parser.inCharRange('A','Z') | |
| 234 ); | |
| 235 String color = parser.textFrom(start); | |
| 236 if( !parser.match(']') ) | |
| 237 return parser.failure(null); | |
| 238 String content = parseWellFormed(); | |
| 239 if( !parser.matchIgnoreCase("[/color]") ) | |
| 240 return parser.failure(null); | |
| 241 String rtn = toHtml ? "<span style='color: "+color+"'>"+content+"</span>" : content; | |
| 242 return parser.success(rtn); | |
| 243 } | |
| 244 | |
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245 private String parseSize() throws LuanException { |
| 585 | 246 parser.begin(); |
| 247 if( !parser.matchIgnoreCase("[size=") ) | |
| 248 return parser.failure(null); | |
| 249 int start = parser.currentIndex(); | |
| 250 while( parser.match('.') || parser.inCharRange('0','9') ); | |
| 251 String size = parser.textFrom(start); | |
| 252 if( !parser.match(']') ) | |
| 253 return parser.failure(null); | |
| 254 String content = parseWellFormed(); | |
| 255 if( !parser.matchIgnoreCase("[/size]") ) | |
| 256 return parser.failure(null); | |
| 257 String rtn = toHtml ? "<span style='font-size: "+size+"em'>"+content+"</span>" : content; | |
| 258 return parser.success(rtn); | |
| 259 } | |
| 260 | |
| 261 private String parseYouTube() { | |
| 262 parser.begin(); | |
| 263 if( !parser.matchIgnoreCase("[youtube]") ) | |
| 264 return parser.failure(null); | |
| 265 int start = parser.currentIndex(); | |
| 266 while( parser.inCharRange('0','9') | |
| 267 || parser.inCharRange('a','z') | |
| 268 || parser.inCharRange('A','Z') | |
| 269 || parser.match('-') | |
| 270 || parser.match('_') | |
| 271 ); | |
| 272 String id = parser.textFrom(start); | |
| 273 if( id.length()==0 || !parser.matchIgnoreCase("[/youtube]") ) | |
| 274 return parser.failure(null); | |
| 275 String rtn = toHtml ? "<iframe width='420' height='315' src='https://www.youtube.com/embed/"+id+"' frameborder='0' allowfullscreen></iframe>" : ""; | |
| 276 return parser.success(rtn); | |
| 277 } | |
| 278 | |
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279 private String quote(Object... args) throws LuanException { |
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280 if( quoter==null ) { |
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281 if( toHtml ) |
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282 throw new LuanException("BBCode quoter function not defined"); |
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283 else |
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284 return ""; |
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285 } |
| 1335 | 286 Object obj = quoter.call(args); |
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287 if( !(obj instanceof String) ) |
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288 throw new LuanException("BBCode quoter function returned "+Luan.type(obj)+" but string required"); |
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289 return (String)obj; |
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290 } |
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291 |
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292 private String parseQuote1() throws LuanException { |
| 585 | 293 parser.begin(); |
| 294 if( !parser.matchIgnoreCase("[quote]") ) | |
| 295 return parser.failure(null); | |
| 296 String content = parseWellFormed(); | |
| 297 if( !parser.matchIgnoreCase("[/quote]") ) | |
| 298 return parser.failure(null); | |
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299 String rtn = quote(content); |
| 585 | 300 return parser.success(rtn); |
| 301 } | |
| 302 | |
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303 private String parseQuote2() throws LuanException { |
| 585 | 304 parser.begin(); |
| 305 if( !parser.matchIgnoreCase("[quote=") ) | |
| 306 return parser.failure(null); | |
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307 List args = new ArrayList(); |
| 585 | 308 int start = parser.currentIndex(); |
| 309 while( parser.noneOf("[];") ); | |
| 310 String name = parser.textFrom(start).trim(); | |
| 311 if( name.length() == 0 ) | |
| 312 return parser.failure(null); | |
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313 args.add(name); |
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314 while( parser.match(';') ) { |
| 585 | 315 start = parser.currentIndex(); |
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316 while( parser.noneOf("[];'") ); |
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317 String src = parser.textFrom(start).trim(); |
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318 args.add(src); |
| 585 | 319 } |
| 320 if( !parser.match(']') ) | |
| 321 return parser.failure(null); | |
| 322 String content = parseWellFormed(); | |
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323 args.add(0,content); |
| 585 | 324 if( !parser.matchIgnoreCase("[/quote]") ) |
| 325 return parser.failure(null); | |
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326 String rtn = quote(args.toArray()); |
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327 return parser.success(rtn); |
| 585 | 328 } |
| 329 | |
| 330 } |