585
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1 package luan.modules.parsers;
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2
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3
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4 public final class BBCode {
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5
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6 public static String toHtml(String bbcode) {
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7 return new BBCode(bbcode,true).parse();
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8 }
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9
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10 public static String toText(String bbcode) {
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11 return new BBCode(bbcode,false).parse();
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12 }
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13
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14 private final Parser parser;
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15 private final boolean toHtml;
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16
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17 private BBCode(String text,boolean toHtml) {
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18 this.parser = new Parser(text);
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19 this.toHtml = toHtml;
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20 }
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21
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22 private String parse() {
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23 StringBuilder sb = new StringBuilder();
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24 while( !parser.endOfInput() ) {
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25 String block = parseBlock();
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26 if( block != null )
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27 sb.append(block);
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28 else {
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29 sb.append( parser.currentChar() );
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30 parser.anyChar();
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31 }
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32 }
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33 return sb.toString();
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34 }
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35
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36 private String parseWellFormed() {
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37 StringBuilder sb = new StringBuilder();
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38 while( !parser.endOfInput() ) {
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39 String block = parseBlock();
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40 if( block != null ) {
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41 sb.append(block);
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42 continue;
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43 }
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44 if( couldBeTag() )
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45 break;
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46 sb.append( parser.currentChar() );
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47 parser.anyChar();
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48 }
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49 return sb.toString();
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50 }
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51
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52 private boolean couldBeTag() {
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53 if( parser.currentChar() != '[' )
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54 return false;
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55 return parser.testIgnoreCase("[b]")
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56 || parser.testIgnoreCase("[/b]")
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57 || parser.testIgnoreCase("[i]")
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58 || parser.testIgnoreCase("[/i]")
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59 || parser.testIgnoreCase("[u]")
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60 || parser.testIgnoreCase("[/u]")
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61 || parser.testIgnoreCase("[url]")
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62 || parser.testIgnoreCase("[url=")
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63 || parser.testIgnoreCase("[/url]")
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64 || parser.testIgnoreCase("[code]")
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65 || parser.testIgnoreCase("[/code]")
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66 || parser.testIgnoreCase("[img]")
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67 || parser.testIgnoreCase("[/img]")
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68 || parser.testIgnoreCase("[color=")
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69 || parser.testIgnoreCase("[/color]")
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70 || parser.testIgnoreCase("[size=")
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71 || parser.testIgnoreCase("[/size]")
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72 || parser.testIgnoreCase("[youtube]")
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73 || parser.testIgnoreCase("[/youtube]")
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74 || parser.testIgnoreCase("[quote]")
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75 || parser.testIgnoreCase("[quote=")
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76 || parser.testIgnoreCase("[/quote]")
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77 ;
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78 }
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79
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80 private String parseBlock() {
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81 if( parser.currentChar() != '[' )
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82 return null;
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83 String s;
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84 s = parseB(); if(s!=null) return s;
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85 s = parseI(); if(s!=null) return s;
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86 s = parseU(); if(s!=null) return s;
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87 s = parseUrl1(); if(s!=null) return s;
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88 s = parseUrl2(); if(s!=null) return s;
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89 s = parseCode(); if(s!=null) return s;
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90 s = parseImg(); if(s!=null) return s;
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91 s = parseColor(); if(s!=null) return s;
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92 s = parseSize(); if(s!=null) return s;
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93 s = parseYouTube(); if(s!=null) return s;
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94 s = parseQuote1(); if(s!=null) return s;
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95 s = parseQuote2(); if(s!=null) return s;
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96 return null;
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97 }
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98
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99 private String parseB() {
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100 parser.begin();
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101 if( !parser.matchIgnoreCase("[b]") )
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102 return parser.failure(null);
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103 String content = parseWellFormed();
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104 if( !parser.matchIgnoreCase("[/b]") )
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105 return parser.failure(null);
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106 String rtn = toHtml ? "<b>"+content+"</b>" : content;
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107 return parser.success(rtn);
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108 }
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109
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110 private String parseI() {
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111 parser.begin();
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112 if( !parser.matchIgnoreCase("[i]") )
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113 return parser.failure(null);
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114 String content = parseWellFormed();
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115 if( !parser.matchIgnoreCase("[/i]") )
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116 return parser.failure(null);
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117 String rtn = toHtml ? "<i>"+content+"</i>" : content;
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118 return parser.success(rtn);
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119 }
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120
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121 private String parseU() {
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122 parser.begin();
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123 if( !parser.matchIgnoreCase("[u]") )
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124 return parser.failure(null);
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125 String content = parseWellFormed();
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126 if( !parser.matchIgnoreCase("[/u]") )
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127 return parser.failure(null);
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128 String rtn = toHtml ? "<u>"+content+"</u>" : content;
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129 return parser.success(rtn);
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130 }
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131
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132 private String parseUrl1() {
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133 parser.begin();
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134 if( !parser.matchIgnoreCase("[url]") )
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135 return parser.failure(null);
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136 String url = parseRealUrl();
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137 if( !parser.matchIgnoreCase("[/url]") )
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138 return parser.failure(null);
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139 String rtn = toHtml ? "<a href='"+url+"'>"+url+"</u>" : url;
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140 return parser.success(rtn);
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141 }
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142
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143 private String parseUrl2() {
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144 parser.begin();
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145 if( !parser.matchIgnoreCase("[url=") )
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146 return parser.failure(null);
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147 String url = parseRealUrl();
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148 if( !parser.match(']') )
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149 return parser.failure(null);
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150 String content = parseWellFormed();
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151 if( !parser.matchIgnoreCase("[/url]") )
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152 return parser.failure(null);
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153 String rtn = toHtml ? "<a href='"+url+"'>"+content+"</u>" : content;
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154 return parser.success(rtn);
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155 }
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156
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157 private String parseRealUrl() {
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158 parser.begin();
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159 while( parser.match(' ') );
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160 int start = parser.currentIndex();
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161 if( !parser.matchIgnoreCase("http") )
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162 return parser.failure(null);
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163 parser.matchIgnoreCase("s");
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164 if( !parser.matchIgnoreCase("://") )
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165 return parser.failure(null);
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166 while( parser.noneOf(" []'") );
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167 String url = parser.textFrom(start);
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168 while( parser.match(' ') );
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169 return parser.success(url);
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170 }
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171
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172 private String parseCode() {
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173 parser.begin();
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174 if( !parser.matchIgnoreCase("[code]") )
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175 return parser.failure(null);
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176 int start = parser.currentIndex();
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177 while( !parser.testIgnoreCase("[/code]") ) {
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178 if( !parser.anyChar() )
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179 return parser.failure(null);
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180 }
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181 String content = parser.textFrom(start);
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182 if( !parser.matchIgnoreCase("[/code]") ) throw new RuntimeException();
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183 String rtn = toHtml ? "<code>"+content+"</code>" : content;
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184 return parser.success(rtn);
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185 }
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186
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187 private String parseImg() {
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188 parser.begin();
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189 if( !parser.matchIgnoreCase("[img]") )
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190 return parser.failure(null);
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191 String url = parseRealUrl();
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192 if( !parser.matchIgnoreCase("[/img]") )
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193 return parser.failure(null);
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194 String rtn = toHtml ? "<img src='"+url+"'>" : "";
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195 return parser.success(rtn);
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196 }
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197
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198 private String parseColor() {
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199 parser.begin();
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200 if( !parser.matchIgnoreCase("[color=") )
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201 return parser.failure(null);
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202 int start = parser.currentIndex();
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203 parser.match('#');
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204 while( parser.inCharRange('0','9')
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205 || parser.inCharRange('a','z')
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206 || parser.inCharRange('A','Z')
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207 );
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208 String color = parser.textFrom(start);
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209 if( !parser.match(']') )
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210 return parser.failure(null);
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211 String content = parseWellFormed();
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212 if( !parser.matchIgnoreCase("[/color]") )
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213 return parser.failure(null);
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214 String rtn = toHtml ? "<span style='color: "+color+"'>"+content+"</span>" : content;
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215 return parser.success(rtn);
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216 }
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217
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218 private String parseSize() {
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219 parser.begin();
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220 if( !parser.matchIgnoreCase("[size=") )
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221 return parser.failure(null);
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222 int start = parser.currentIndex();
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223 while( parser.match('.') || parser.inCharRange('0','9') );
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224 String size = parser.textFrom(start);
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225 if( !parser.match(']') )
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226 return parser.failure(null);
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227 String content = parseWellFormed();
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228 if( !parser.matchIgnoreCase("[/size]") )
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229 return parser.failure(null);
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230 String rtn = toHtml ? "<span style='font-size: "+size+"em'>"+content+"</span>" : content;
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231 return parser.success(rtn);
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232 }
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233
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234 private String parseYouTube() {
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235 parser.begin();
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236 if( !parser.matchIgnoreCase("[youtube]") )
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237 return parser.failure(null);
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238 int start = parser.currentIndex();
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239 while( parser.inCharRange('0','9')
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240 || parser.inCharRange('a','z')
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241 || parser.inCharRange('A','Z')
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242 || parser.match('-')
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243 || parser.match('_')
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244 );
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245 String id = parser.textFrom(start);
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246 if( id.length()==0 || !parser.matchIgnoreCase("[/youtube]") )
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247 return parser.failure(null);
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248 String rtn = toHtml ? "<iframe width='420' height='315' src='https://www.youtube.com/embed/"+id+"' frameborder='0' allowfullscreen></iframe>" : "";
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249 return parser.success(rtn);
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250 }
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251
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252 private String parseQuote1() {
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253 parser.begin();
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254 if( !parser.matchIgnoreCase("[quote]") )
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255 return parser.failure(null);
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256 String content = parseWellFormed();
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257 if( !parser.matchIgnoreCase("[/quote]") )
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258 return parser.failure(null);
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259 String rtn = toHtml ? "<blockquote>"+content+"</blockquote>" : "";
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260 return parser.success(rtn);
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261 }
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262
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263 private String parseQuote2() {
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264 parser.begin();
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265 if( !parser.matchIgnoreCase("[quote=") )
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266 return parser.failure(null);
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267 int start = parser.currentIndex();
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268 while( parser.noneOf("[];") );
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269 String name = parser.textFrom(start).trim();
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270 if( name.length() == 0 )
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271 return parser.failure(null);
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272 String src = null;
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273 if( parser.match(';') ) {
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274 start = parser.currentIndex();
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275 while( parser.noneOf("[]'") );
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276 src = parser.textFrom(start).trim();
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277 if( src.length() == 0 )
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278 return parser.failure(null);
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279 }
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280 if( !parser.match(']') )
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281 return parser.failure(null);
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282 String content = parseWellFormed();
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283 if( !parser.matchIgnoreCase("[/quote]") )
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284 return parser.failure(null);
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285 if( !toHtml )
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286 return parser.success("");
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287 StringBuilder sb = new StringBuilder();
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288 sb.append( "<blockquote><div quoted>" );
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289 if( src != null )
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290 sb.append( "<a href='/thread?id=" ).append( src ).append( "'>" );
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291 sb.append( name ).append( " wrote" );
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292 if( src != null )
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293 sb.append( "</a>" );
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294 sb.append( ":</div>" ).append( content ).append( "</blockquote>" );
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295 return parser.success(sb.toString());
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296 }
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297
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298 }
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