Mercurial Hosting > luan
annotate src/luan/modules/parsers/BBCode.java @ 1247:728d8e75f476
html encode bbcode
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Tue, 17 Jul 2018 22:17:01 -0600 |
| parents | 88b5b81cad4a |
| children | 475905984870 |
| 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; |
| 1247 | 10 import luan.modules.HtmlLuan; |
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11 import luan.lib.parser.Parser; |
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12 |
| 585 | 13 |
| 14 public final class BBCode { | |
| 15 | |
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16 public static String toHtml(LuanState luan,String bbcode,LuanFunction quoter) throws LuanException { |
| 638 | 17 return new BBCode(luan,bbcode,quoter,true).parse(); |
| 585 | 18 } |
| 19 | |
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20 public static String toText(LuanState luan,String bbcode,LuanFunction quoter) throws LuanException { |
| 638 | 21 return new BBCode(luan,bbcode,quoter,false).parse(); |
| 585 | 22 } |
| 23 | |
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24 private final LuanState luan; |
| 585 | 25 private final Parser parser; |
| 638 | 26 private final LuanFunction quoter; |
| 585 | 27 private final boolean toHtml; |
| 28 | |
| 638 | 29 private BBCode(LuanState luan,String text,LuanFunction quoter,boolean toHtml) throws LuanException { |
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30 Utils.checkNotNull(text,1); |
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31 // Utils.checkNotNull(quoter,2); |
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32 this.luan = luan; |
| 585 | 33 this.parser = new Parser(text); |
| 638 | 34 this.quoter = quoter; |
| 585 | 35 this.toHtml = toHtml; |
| 36 } | |
| 37 | |
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38 private String parse() throws LuanException { |
| 585 | 39 StringBuilder sb = new StringBuilder(); |
| 1247 | 40 StringBuilder text = new StringBuilder(); |
| 585 | 41 while( !parser.endOfInput() ) { |
| 42 String block = parseBlock(); | |
| 1247 | 43 if( block != null ) { |
| 44 sb.append( textToString(text) ); | |
| 585 | 45 sb.append(block); |
| 1247 | 46 } else { |
| 47 text.append( parser.currentChar() ); | |
| 585 | 48 parser.anyChar(); |
| 49 } | |
| 50 } | |
| 1247 | 51 sb.append( textToString(text) ); |
| 585 | 52 return sb.toString(); |
| 53 } | |
| 54 | |
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55 private String parseWellFormed() throws LuanException { |
| 585 | 56 StringBuilder sb = new StringBuilder(); |
| 1247 | 57 StringBuilder text = new StringBuilder(); |
| 585 | 58 while( !parser.endOfInput() ) { |
| 59 String block = parseBlock(); | |
| 60 if( block != null ) { | |
| 1247 | 61 sb.append( textToString(text) ); |
| 585 | 62 sb.append(block); |
| 63 continue; | |
| 64 } | |
| 65 if( couldBeTag() ) | |
| 66 break; | |
| 1247 | 67 text.append( parser.currentChar() ); |
| 585 | 68 parser.anyChar(); |
| 69 } | |
| 1247 | 70 sb.append( textToString(text) ); |
| 585 | 71 return sb.toString(); |
| 72 } | |
| 73 | |
| 1247 | 74 private String textToString(StringBuilder text) throws LuanException { |
| 75 String s = text.toString(); | |
| 76 text.setLength(0); | |
| 77 if( toHtml ) | |
| 78 s = HtmlLuan.encode(s); | |
| 79 return s; | |
| 80 } | |
| 81 | |
| 585 | 82 private boolean couldBeTag() { |
| 83 if( parser.currentChar() != '[' ) | |
| 84 return false; | |
| 85 return parser.testIgnoreCase("[b]") | |
| 86 || parser.testIgnoreCase("[/b]") | |
| 87 || parser.testIgnoreCase("[i]") | |
| 88 || parser.testIgnoreCase("[/i]") | |
| 89 || parser.testIgnoreCase("[u]") | |
| 90 || parser.testIgnoreCase("[/u]") | |
| 91 || parser.testIgnoreCase("[url]") | |
| 92 || parser.testIgnoreCase("[url=") | |
| 93 || parser.testIgnoreCase("[/url]") | |
| 94 || parser.testIgnoreCase("[code]") | |
| 95 || parser.testIgnoreCase("[/code]") | |
| 96 || parser.testIgnoreCase("[img]") | |
| 97 || parser.testIgnoreCase("[/img]") | |
| 98 || parser.testIgnoreCase("[color=") | |
| 99 || parser.testIgnoreCase("[/color]") | |
| 100 || parser.testIgnoreCase("[size=") | |
| 101 || parser.testIgnoreCase("[/size]") | |
| 102 || parser.testIgnoreCase("[youtube]") | |
| 103 || parser.testIgnoreCase("[/youtube]") | |
| 104 || parser.testIgnoreCase("[quote]") | |
| 105 || parser.testIgnoreCase("[quote=") | |
| 106 || parser.testIgnoreCase("[/quote]") | |
| 107 ; | |
| 108 } | |
| 109 | |
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110 private String parseBlock() throws LuanException { |
| 585 | 111 if( parser.currentChar() != '[' ) |
| 112 return null; | |
| 113 String s; | |
| 114 s = parseB(); if(s!=null) return s; | |
| 115 s = parseI(); if(s!=null) return s; | |
| 116 s = parseU(); if(s!=null) return s; | |
| 117 s = parseUrl1(); if(s!=null) return s; | |
| 118 s = parseUrl2(); if(s!=null) return s; | |
| 119 s = parseCode(); if(s!=null) return s; | |
| 120 s = parseImg(); if(s!=null) return s; | |
| 121 s = parseColor(); if(s!=null) return s; | |
| 122 s = parseSize(); if(s!=null) return s; | |
| 123 s = parseYouTube(); if(s!=null) return s; | |
| 124 s = parseQuote1(); if(s!=null) return s; | |
| 125 s = parseQuote2(); if(s!=null) return s; | |
| 126 return null; | |
| 127 } | |
| 128 | |
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129 private String parseB() throws LuanException { |
| 585 | 130 parser.begin(); |
| 131 if( !parser.matchIgnoreCase("[b]") ) | |
| 132 return parser.failure(null); | |
| 133 String content = parseWellFormed(); | |
| 134 if( !parser.matchIgnoreCase("[/b]") ) | |
| 135 return parser.failure(null); | |
| 136 String rtn = toHtml ? "<b>"+content+"</b>" : content; | |
| 137 return parser.success(rtn); | |
| 138 } | |
| 139 | |
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140 private String parseI() throws LuanException { |
| 585 | 141 parser.begin(); |
| 142 if( !parser.matchIgnoreCase("[i]") ) | |
| 143 return parser.failure(null); | |
| 144 String content = parseWellFormed(); | |
| 145 if( !parser.matchIgnoreCase("[/i]") ) | |
| 146 return parser.failure(null); | |
| 147 String rtn = toHtml ? "<i>"+content+"</i>" : content; | |
| 148 return parser.success(rtn); | |
| 149 } | |
| 150 | |
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151 private String parseU() throws LuanException { |
| 585 | 152 parser.begin(); |
| 153 if( !parser.matchIgnoreCase("[u]") ) | |
| 154 return parser.failure(null); | |
| 155 String content = parseWellFormed(); | |
| 156 if( !parser.matchIgnoreCase("[/u]") ) | |
| 157 return parser.failure(null); | |
| 158 String rtn = toHtml ? "<u>"+content+"</u>" : content; | |
| 159 return parser.success(rtn); | |
| 160 } | |
| 161 | |
| 162 private String parseUrl1() { | |
| 163 parser.begin(); | |
| 164 if( !parser.matchIgnoreCase("[url]") ) | |
| 165 return parser.failure(null); | |
| 166 String url = parseRealUrl(); | |
| 167 if( !parser.matchIgnoreCase("[/url]") ) | |
| 168 return parser.failure(null); | |
| 169 String rtn = toHtml ? "<a href='"+url+"'>"+url+"</u>" : url; | |
| 170 return parser.success(rtn); | |
| 171 } | |
| 172 | |
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173 private String parseUrl2() throws LuanException { |
| 585 | 174 parser.begin(); |
| 175 if( !parser.matchIgnoreCase("[url=") ) | |
| 176 return parser.failure(null); | |
| 177 String url = parseRealUrl(); | |
| 178 if( !parser.match(']') ) | |
| 179 return parser.failure(null); | |
| 180 String content = parseWellFormed(); | |
| 181 if( !parser.matchIgnoreCase("[/url]") ) | |
| 182 return parser.failure(null); | |
| 183 String rtn = toHtml ? "<a href='"+url+"'>"+content+"</u>" : content; | |
| 184 return parser.success(rtn); | |
| 185 } | |
| 186 | |
| 187 private String parseRealUrl() { | |
| 188 parser.begin(); | |
| 189 while( parser.match(' ') ); | |
| 190 int start = parser.currentIndex(); | |
| 191 if( !parser.matchIgnoreCase("http") ) | |
| 192 return parser.failure(null); | |
| 193 parser.matchIgnoreCase("s"); | |
| 194 if( !parser.matchIgnoreCase("://") ) | |
| 195 return parser.failure(null); | |
| 196 while( parser.noneOf(" []'") ); | |
| 197 String url = parser.textFrom(start); | |
| 198 while( parser.match(' ') ); | |
| 199 return parser.success(url); | |
| 200 } | |
| 201 | |
| 202 private String parseCode() { | |
| 203 parser.begin(); | |
| 204 if( !parser.matchIgnoreCase("[code]") ) | |
| 205 return parser.failure(null); | |
| 206 int start = parser.currentIndex(); | |
| 207 while( !parser.testIgnoreCase("[/code]") ) { | |
| 208 if( !parser.anyChar() ) | |
| 209 return parser.failure(null); | |
| 210 } | |
| 211 String content = parser.textFrom(start); | |
| 212 if( !parser.matchIgnoreCase("[/code]") ) throw new RuntimeException(); | |
| 213 String rtn = toHtml ? "<code>"+content+"</code>" : content; | |
| 214 return parser.success(rtn); | |
| 215 } | |
| 216 | |
| 217 private String parseImg() { | |
| 218 parser.begin(); | |
| 219 if( !parser.matchIgnoreCase("[img]") ) | |
| 220 return parser.failure(null); | |
| 221 String url = parseRealUrl(); | |
| 222 if( !parser.matchIgnoreCase("[/img]") ) | |
| 223 return parser.failure(null); | |
| 224 String rtn = toHtml ? "<img src='"+url+"'>" : ""; | |
| 225 return parser.success(rtn); | |
| 226 } | |
| 227 | |
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228 private String parseColor() throws LuanException { |
| 585 | 229 parser.begin(); |
| 230 if( !parser.matchIgnoreCase("[color=") ) | |
| 231 return parser.failure(null); | |
| 232 int start = parser.currentIndex(); | |
| 233 parser.match('#'); | |
| 234 while( parser.inCharRange('0','9') | |
| 235 || parser.inCharRange('a','z') | |
| 236 || parser.inCharRange('A','Z') | |
| 237 ); | |
| 238 String color = parser.textFrom(start); | |
| 239 if( !parser.match(']') ) | |
| 240 return parser.failure(null); | |
| 241 String content = parseWellFormed(); | |
| 242 if( !parser.matchIgnoreCase("[/color]") ) | |
| 243 return parser.failure(null); | |
| 244 String rtn = toHtml ? "<span style='color: "+color+"'>"+content+"</span>" : content; | |
| 245 return parser.success(rtn); | |
| 246 } | |
| 247 | |
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248 private String parseSize() throws LuanException { |
| 585 | 249 parser.begin(); |
| 250 if( !parser.matchIgnoreCase("[size=") ) | |
| 251 return parser.failure(null); | |
| 252 int start = parser.currentIndex(); | |
| 253 while( parser.match('.') || parser.inCharRange('0','9') ); | |
| 254 String size = parser.textFrom(start); | |
| 255 if( !parser.match(']') ) | |
| 256 return parser.failure(null); | |
| 257 String content = parseWellFormed(); | |
| 258 if( !parser.matchIgnoreCase("[/size]") ) | |
| 259 return parser.failure(null); | |
| 260 String rtn = toHtml ? "<span style='font-size: "+size+"em'>"+content+"</span>" : content; | |
| 261 return parser.success(rtn); | |
| 262 } | |
| 263 | |
| 264 private String parseYouTube() { | |
| 265 parser.begin(); | |
| 266 if( !parser.matchIgnoreCase("[youtube]") ) | |
| 267 return parser.failure(null); | |
| 268 int start = parser.currentIndex(); | |
| 269 while( parser.inCharRange('0','9') | |
| 270 || parser.inCharRange('a','z') | |
| 271 || parser.inCharRange('A','Z') | |
| 272 || parser.match('-') | |
| 273 || parser.match('_') | |
| 274 ); | |
| 275 String id = parser.textFrom(start); | |
| 276 if( id.length()==0 || !parser.matchIgnoreCase("[/youtube]") ) | |
| 277 return parser.failure(null); | |
| 278 String rtn = toHtml ? "<iframe width='420' height='315' src='https://www.youtube.com/embed/"+id+"' frameborder='0' allowfullscreen></iframe>" : ""; | |
| 279 return parser.success(rtn); | |
| 280 } | |
| 281 | |
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282 private String quote(Object... args) throws LuanException { |
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283 if( quoter==null ) |
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284 throw new LuanException("BBCode quoter function not defined"); |
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285 Object obj = quoter.call(luan,args); |
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286 if( !(obj instanceof String) ) |
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287 throw new LuanException("BBCode quoter function returned "+Luan.type(obj)+" but string required"); |
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288 return (String)obj; |
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289 } |
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290 |
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291 private String parseQuote1() throws LuanException { |
| 585 | 292 parser.begin(); |
| 293 if( !parser.matchIgnoreCase("[quote]") ) | |
| 294 return parser.failure(null); | |
| 295 String content = parseWellFormed(); | |
| 296 if( !parser.matchIgnoreCase("[/quote]") ) | |
| 297 return parser.failure(null); | |
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298 String rtn = quote(content); |
| 585 | 299 return parser.success(rtn); |
| 300 } | |
| 301 | |
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302 private String parseQuote2() throws LuanException { |
| 585 | 303 parser.begin(); |
| 304 if( !parser.matchIgnoreCase("[quote=") ) | |
| 305 return parser.failure(null); | |
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306 List args = new ArrayList(); |
| 585 | 307 int start = parser.currentIndex(); |
| 308 while( parser.noneOf("[];") ); | |
| 309 String name = parser.textFrom(start).trim(); | |
| 310 if( name.length() == 0 ) | |
| 311 return parser.failure(null); | |
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312 args.add(name); |
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313 while( parser.match(';') ) { |
| 585 | 314 start = parser.currentIndex(); |
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315 while( parser.noneOf("[];'") ); |
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316 String src = parser.textFrom(start).trim(); |
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317 args.add(src); |
| 585 | 318 } |
| 319 if( !parser.match(']') ) | |
| 320 return parser.failure(null); | |
| 321 String content = parseWellFormed(); | |
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322 args.add(0,content); |
| 585 | 323 if( !parser.matchIgnoreCase("[/quote]") ) |
| 324 return parser.failure(null); | |
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325 String rtn = quote(args.toArray()); |
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326 return parser.success(rtn); |
| 585 | 327 } |
| 328 | |
| 329 } |