Mercurial Hosting > luan
annotate src/luan/modules/parsers/BBCode.java @ 1563:8fbcc4747091
remove LuanFunction.luan
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Mon, 09 Nov 2020 01:37:57 -0700 |
| parents | 27efb1fcbcb5 |
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| rev | line source |
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| 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 goodjava.parser.Parser; |
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11 |
| 585 | 12 |
| 13 public final class BBCode { | |
| 14 | |
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15 public static String toHtml(Luan luan,String bbcode,LuanFunction quoter) throws LuanException { |
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16 return new BBCode(luan,bbcode,quoter,true).parse(); |
| 585 | 17 } |
| 18 | |
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19 public static String toText(Luan luan,String bbcode,LuanFunction quoter) throws LuanException { |
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20 return new BBCode(luan,bbcode,quoter,false).parse(); |
| 585 | 21 } |
| 22 | |
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23 private final Luan luan; |
| 585 | 24 private final Parser parser; |
| 638 | 25 private final LuanFunction quoter; |
| 585 | 26 private final boolean toHtml; |
| 27 | |
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28 private BBCode(Luan 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(); |
| 1247 | 39 StringBuilder text = new StringBuilder(); |
| 585 | 40 while( !parser.endOfInput() ) { |
| 41 String block = parseBlock(); | |
| 1247 | 42 if( block != null ) { |
| 43 sb.append( textToString(text) ); | |
| 585 | 44 sb.append(block); |
| 1247 | 45 } else { |
| 46 text.append( parser.currentChar() ); | |
| 585 | 47 parser.anyChar(); |
| 48 } | |
| 49 } | |
| 1247 | 50 sb.append( textToString(text) ); |
| 585 | 51 return sb.toString(); |
| 52 } | |
| 53 | |
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54 private String parseWellFormed() throws LuanException { |
| 585 | 55 StringBuilder sb = new StringBuilder(); |
| 1247 | 56 StringBuilder text = new StringBuilder(); |
| 585 | 57 while( !parser.endOfInput() ) { |
| 58 String block = parseBlock(); | |
| 59 if( block != null ) { | |
| 1247 | 60 sb.append( textToString(text) ); |
| 585 | 61 sb.append(block); |
| 62 continue; | |
| 63 } | |
| 64 if( couldBeTag() ) | |
| 65 break; | |
| 1247 | 66 text.append( parser.currentChar() ); |
| 585 | 67 parser.anyChar(); |
| 68 } | |
| 1247 | 69 sb.append( textToString(text) ); |
| 585 | 70 return sb.toString(); |
| 71 } | |
| 72 | |
| 1247 | 73 private String textToString(StringBuilder text) throws LuanException { |
| 74 String s = text.toString(); | |
| 75 text.setLength(0); | |
| 76 if( toHtml ) | |
| 77 s = HtmlLuan.encode(s); | |
| 78 return s; | |
| 79 } | |
| 80 | |
| 585 | 81 private boolean couldBeTag() { |
| 82 if( parser.currentChar() != '[' ) | |
| 83 return false; | |
| 84 return parser.testIgnoreCase("[b]") | |
| 85 || parser.testIgnoreCase("[/b]") | |
| 86 || parser.testIgnoreCase("[i]") | |
| 87 || parser.testIgnoreCase("[/i]") | |
| 88 || parser.testIgnoreCase("[u]") | |
| 89 || parser.testIgnoreCase("[/u]") | |
| 90 || parser.testIgnoreCase("[url]") | |
| 91 || parser.testIgnoreCase("[url=") | |
| 92 || parser.testIgnoreCase("[/url]") | |
| 93 || parser.testIgnoreCase("[code]") | |
| 94 || parser.testIgnoreCase("[/code]") | |
| 95 || parser.testIgnoreCase("[img]") | |
| 96 || parser.testIgnoreCase("[/img]") | |
| 97 || parser.testIgnoreCase("[color=") | |
| 98 || parser.testIgnoreCase("[/color]") | |
| 99 || parser.testIgnoreCase("[size=") | |
| 100 || parser.testIgnoreCase("[/size]") | |
| 101 || parser.testIgnoreCase("[youtube]") | |
| 102 || parser.testIgnoreCase("[/youtube]") | |
| 103 || parser.testIgnoreCase("[quote]") | |
| 104 || parser.testIgnoreCase("[quote=") | |
| 105 || parser.testIgnoreCase("[/quote]") | |
| 106 ; | |
| 107 } | |
| 108 | |
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109 private String parseBlock() throws LuanException { |
| 585 | 110 if( parser.currentChar() != '[' ) |
| 111 return null; | |
| 112 String s; | |
| 113 s = parseB(); if(s!=null) return s; | |
| 114 s = parseI(); if(s!=null) return s; | |
| 115 s = parseU(); if(s!=null) return s; | |
| 116 s = parseUrl1(); if(s!=null) return s; | |
| 117 s = parseUrl2(); if(s!=null) return s; | |
| 118 s = parseCode(); if(s!=null) return s; | |
| 119 s = parseImg(); if(s!=null) return s; | |
| 120 s = parseColor(); if(s!=null) return s; | |
| 121 s = parseSize(); if(s!=null) return s; | |
| 122 s = parseYouTube(); if(s!=null) return s; | |
| 123 s = parseQuote1(); if(s!=null) return s; | |
| 124 s = parseQuote2(); if(s!=null) return s; | |
| 125 return null; | |
| 126 } | |
| 127 | |
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128 private String parseB() throws LuanException { |
| 585 | 129 parser.begin(); |
| 130 if( !parser.matchIgnoreCase("[b]") ) | |
| 131 return parser.failure(null); | |
| 132 String content = parseWellFormed(); | |
| 133 if( !parser.matchIgnoreCase("[/b]") ) | |
| 134 return parser.failure(null); | |
| 135 String rtn = toHtml ? "<b>"+content+"</b>" : content; | |
| 136 return parser.success(rtn); | |
| 137 } | |
| 138 | |
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139 private String parseI() throws LuanException { |
| 585 | 140 parser.begin(); |
| 141 if( !parser.matchIgnoreCase("[i]") ) | |
| 142 return parser.failure(null); | |
| 143 String content = parseWellFormed(); | |
| 144 if( !parser.matchIgnoreCase("[/i]") ) | |
| 145 return parser.failure(null); | |
| 146 String rtn = toHtml ? "<i>"+content+"</i>" : content; | |
| 147 return parser.success(rtn); | |
| 148 } | |
| 149 | |
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150 private String parseU() throws LuanException { |
| 585 | 151 parser.begin(); |
| 152 if( !parser.matchIgnoreCase("[u]") ) | |
| 153 return parser.failure(null); | |
| 154 String content = parseWellFormed(); | |
| 155 if( !parser.matchIgnoreCase("[/u]") ) | |
| 156 return parser.failure(null); | |
| 157 String rtn = toHtml ? "<u>"+content+"</u>" : content; | |
| 158 return parser.success(rtn); | |
| 159 } | |
| 160 | |
| 161 private String parseUrl1() { | |
| 162 parser.begin(); | |
| 163 if( !parser.matchIgnoreCase("[url]") ) | |
| 164 return parser.failure(null); | |
| 165 String url = parseRealUrl(); | |
| 166 if( !parser.matchIgnoreCase("[/url]") ) | |
| 167 return parser.failure(null); | |
| 168 String rtn = toHtml ? "<a href='"+url+"'>"+url+"</u>" : url; | |
| 169 return parser.success(rtn); | |
| 170 } | |
| 171 | |
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172 private String parseUrl2() throws LuanException { |
| 585 | 173 parser.begin(); |
| 174 if( !parser.matchIgnoreCase("[url=") ) | |
| 175 return parser.failure(null); | |
| 176 String url = parseRealUrl(); | |
| 177 if( !parser.match(']') ) | |
| 178 return parser.failure(null); | |
| 179 String content = parseWellFormed(); | |
| 180 if( !parser.matchIgnoreCase("[/url]") ) | |
| 181 return parser.failure(null); | |
| 182 String rtn = toHtml ? "<a href='"+url+"'>"+content+"</u>" : content; | |
| 183 return parser.success(rtn); | |
| 184 } | |
| 185 | |
| 186 private String parseRealUrl() { | |
| 187 parser.begin(); | |
| 188 while( parser.match(' ') ); | |
| 189 int start = parser.currentIndex(); | |
| 190 if( !parser.matchIgnoreCase("http") ) | |
| 191 return parser.failure(null); | |
| 192 parser.matchIgnoreCase("s"); | |
| 193 if( !parser.matchIgnoreCase("://") ) | |
| 194 return parser.failure(null); | |
| 195 while( parser.noneOf(" []'") ); | |
| 196 String url = parser.textFrom(start); | |
| 197 while( parser.match(' ') ); | |
| 198 return parser.success(url); | |
| 199 } | |
| 200 | |
| 201 private String parseCode() { | |
| 202 parser.begin(); | |
| 203 if( !parser.matchIgnoreCase("[code]") ) | |
| 204 return parser.failure(null); | |
| 205 int start = parser.currentIndex(); | |
| 206 while( !parser.testIgnoreCase("[/code]") ) { | |
| 207 if( !parser.anyChar() ) | |
| 208 return parser.failure(null); | |
| 209 } | |
| 210 String content = parser.textFrom(start); | |
| 211 if( !parser.matchIgnoreCase("[/code]") ) throw new RuntimeException(); | |
| 212 String rtn = toHtml ? "<code>"+content+"</code>" : content; | |
| 213 return parser.success(rtn); | |
| 214 } | |
| 215 | |
| 216 private String parseImg() { | |
| 217 parser.begin(); | |
| 218 if( !parser.matchIgnoreCase("[img]") ) | |
| 219 return parser.failure(null); | |
| 220 String url = parseRealUrl(); | |
| 221 if( !parser.matchIgnoreCase("[/img]") ) | |
| 222 return parser.failure(null); | |
| 223 String rtn = toHtml ? "<img src='"+url+"'>" : ""; | |
| 224 return parser.success(rtn); | |
| 225 } | |
| 226 | |
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227 private String parseColor() throws LuanException { |
| 585 | 228 parser.begin(); |
| 229 if( !parser.matchIgnoreCase("[color=") ) | |
| 230 return parser.failure(null); | |
| 231 int start = parser.currentIndex(); | |
| 232 parser.match('#'); | |
| 233 while( parser.inCharRange('0','9') | |
| 234 || parser.inCharRange('a','z') | |
| 235 || parser.inCharRange('A','Z') | |
| 236 ); | |
| 237 String color = parser.textFrom(start); | |
| 238 if( !parser.match(']') ) | |
| 239 return parser.failure(null); | |
| 240 String content = parseWellFormed(); | |
| 241 if( !parser.matchIgnoreCase("[/color]") ) | |
| 242 return parser.failure(null); | |
| 243 String rtn = toHtml ? "<span style='color: "+color+"'>"+content+"</span>" : content; | |
| 244 return parser.success(rtn); | |
| 245 } | |
| 246 | |
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247 private String parseSize() throws LuanException { |
| 585 | 248 parser.begin(); |
| 249 if( !parser.matchIgnoreCase("[size=") ) | |
| 250 return parser.failure(null); | |
| 251 int start = parser.currentIndex(); | |
| 252 while( parser.match('.') || parser.inCharRange('0','9') ); | |
| 253 String size = parser.textFrom(start); | |
| 254 if( !parser.match(']') ) | |
| 255 return parser.failure(null); | |
| 256 String content = parseWellFormed(); | |
| 257 if( !parser.matchIgnoreCase("[/size]") ) | |
| 258 return parser.failure(null); | |
| 259 String rtn = toHtml ? "<span style='font-size: "+size+"em'>"+content+"</span>" : content; | |
| 260 return parser.success(rtn); | |
| 261 } | |
| 262 | |
| 263 private String parseYouTube() { | |
| 264 parser.begin(); | |
| 265 if( !parser.matchIgnoreCase("[youtube]") ) | |
| 266 return parser.failure(null); | |
| 267 int start = parser.currentIndex(); | |
| 268 while( parser.inCharRange('0','9') | |
| 269 || parser.inCharRange('a','z') | |
| 270 || parser.inCharRange('A','Z') | |
| 271 || parser.match('-') | |
| 272 || parser.match('_') | |
| 273 ); | |
| 274 String id = parser.textFrom(start); | |
| 275 if( id.length()==0 || !parser.matchIgnoreCase("[/youtube]") ) | |
| 276 return parser.failure(null); | |
| 277 String rtn = toHtml ? "<iframe width='420' height='315' src='https://www.youtube.com/embed/"+id+"' frameborder='0' allowfullscreen></iframe>" : ""; | |
| 278 return parser.success(rtn); | |
| 279 } | |
| 280 | |
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281 private String quote(Object... args) throws LuanException { |
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282 if( quoter==null ) { |
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283 if( toHtml ) |
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284 throw new LuanException("BBCode quoter function not defined"); |
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285 else |
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286 return ""; |
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287 } |
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288 Object obj = quoter.call(luan,args); |
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289 if( !(obj instanceof String) ) |
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290 throw new LuanException("BBCode quoter function returned "+Luan.type(obj)+" but string required"); |
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291 return (String)obj; |
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292 } |
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293 |
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294 private String parseQuote1() throws LuanException { |
| 585 | 295 parser.begin(); |
| 296 if( !parser.matchIgnoreCase("[quote]") ) | |
| 297 return parser.failure(null); | |
| 298 String content = parseWellFormed(); | |
| 299 if( !parser.matchIgnoreCase("[/quote]") ) | |
| 300 return parser.failure(null); | |
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301 String rtn = quote(content); |
| 585 | 302 return parser.success(rtn); |
| 303 } | |
| 304 | |
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305 private String parseQuote2() throws LuanException { |
| 585 | 306 parser.begin(); |
| 307 if( !parser.matchIgnoreCase("[quote=") ) | |
| 308 return parser.failure(null); | |
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309 List args = new ArrayList(); |
| 585 | 310 int start = parser.currentIndex(); |
| 311 while( parser.noneOf("[];") ); | |
| 312 String name = parser.textFrom(start).trim(); | |
| 313 if( name.length() == 0 ) | |
| 314 return parser.failure(null); | |
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315 args.add(name); |
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316 while( parser.match(';') ) { |
| 585 | 317 start = parser.currentIndex(); |
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318 while( parser.noneOf("[];'") ); |
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319 String src = parser.textFrom(start).trim(); |
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320 args.add(src); |
| 585 | 321 } |
| 322 if( !parser.match(']') ) | |
| 323 return parser.failure(null); | |
| 324 String content = parseWellFormed(); | |
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325 args.add(0,content); |
| 585 | 326 if( !parser.matchIgnoreCase("[/quote]") ) |
| 327 return parser.failure(null); | |
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328 String rtn = quote(args.toArray()); |
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329 return parser.success(rtn); |
| 585 | 330 } |
| 331 | |
| 332 } |