1 # 2 # Copyright (C) 2016 and later: Unicode, Inc. and others. 3 # License & terms of use: http://www.unicode.org/copyright.html 4 # Copyright (C) 2002-2016, International Business Machines Corporation 5 # and others. All Rights Reserved. 6 # 7 # file: word.txt 8 # 9 # ICU Word Break Rules 10 # See Unicode Standard Annex #29. 11 # These rules are based on UAX #29 Revision 29 for Unicode Version 9.0 12 # with additions for Emoji Sequences from https://goo.gl/cluFCn 13 # 14 # Note: Updates to word.txt will usually need to be merged into 15 # word_POSIX.txt also. 16 17 ############################################################################## 18 # 19 # Character class definitions from TR 29 20 # 21 ############################################################################## 22 23 !!chain; 24 25 26 # 27 # Character Class Definitions. 28 # 29 30 $CR = [\p{Word_Break = CR}]; 31 $LF = [\p{Word_Break = LF}]; 32 $Newline = [\p{Word_Break = Newline} ]; 33 $Extend = [\p{Word_Break = Extend}]; 34 $ZWJ = [\p{Word_Break = ZWJ}]; 35 $Regional_Indicator = [\p{Word_Break = Regional_Indicator}]; 36 $Format = [\p{Word_Break = Format}]; 37 $Katakana = [\p{Word_Break = Katakana}]; 38 $Hebrew_Letter = [\p{Word_Break = Hebrew_Letter}]; 39 $ALetter = [\p{Word_Break = ALetter}]; 40 $Single_Quote = [\p{Word_Break = Single_Quote}]; 41 $Double_Quote = [\p{Word_Break = Double_Quote}]; 42 $MidNumLet = [\p{Word_Break = MidNumLet}]; 43 $MidLetter = [\p{Word_Break = MidLetter}]; 44 $MidNum = [\p{Word_Break = MidNum}]; 45 $Numeric = [\p{Word_Break = Numeric}]; 46 $ExtendNumLet = [\p{Word_Break = ExtendNumLet}]; 47 $E_Base = [\p{Word_Break = EB}\U0001F3C2\U0001F3C7\U0001F3CC\U0001F46A-\U0001F46D\U0001F46F\U0001F574\U0001F6CC]; 48 $E_Modifier = [\p{Word_Break = EM}]; 49 50 # Data for Extended Pictographic scraped from CLDR common/properties/ExtendedPictographic.txt, r12773 51 $Extended_Pict = [\U0001F774-\U0001F77F\u2700-\u2701\u2703-\u2704\u270E\u2710-\u2711\u2765-\u2767\U0001F030-\U0001F093\U0001F094-\U0001F09F\U0001F10D-\U0001F10F\U0001F12F\U0001F16C-\U0001F16F\U0001F1AD-\U0001F1E5\U0001F203-\U0001F20F\U0001F23C-\U0001F23F\U0001F249-\U0001F24F\U0001F252-\U0001F2FF\U0001F7D5-\U0001F7FF\U0001F000-\U0001F003\U0001F005-\U0001F02B\U0001F02C-\U0001F02F\U0001F322-\U0001F323\U0001F394-\U0001F395\U0001F398\U0001F39C-\U0001F39D\U0001F3F1-\U0001F3F2\U0001F3F6\U0001F4FE\U0001F53E-\U0001F548\U0001F54F\U0001F568-\U0001F56E\U0001F571-\U0001F572\U0001F57B-\U0001F586\U0001F588-\U0001F589\U0001F58E-\U0001F58F\U0001F591-\U0001F594\U0001F597-\U0001F5A3\U0001F5A6-\U0001F5A7\U0001F5A9-\U0001F5B0\U0001F5B3-\U0001F5BB\U0001F5BD-\U0001F5C1\U0001F5C5-\U0001F5D0\U0001F5D4-\U0001F5DB\U0001F5DF-\U0001F5E0\U0001F5E2\U0001F5E4-\U0001F5E7\U0001F5E9-\U0001F5EE\U0001F5F0-\U0001F5F2\U0001F5F4-\U0001F5F9\u2605\u2607-\u260D\u260F-\u2610\u2612\u2616-\u2617\u2619-\u261C\u261E-\u261F\u2621\u2624-\u2625\u2627-\u2629\u262B-\u262D\u2630-\u2637\u263B-\u2647\u2654-\u265F\u2661-\u2662\u2664\u2667\u2669-\u267A\u267C-\u267E\u2680-\u2691\u2695\u2698\u269A\u269D-\u269F\u26A2-\u26A9\u26AC-\u26AF\u26B2-\u26BC\u26BF-\u26C3\u26C6-\u26C7\u26C9-\u26CD\u26D0\u26D2\u26D5-\u26E8\u26EB-\u26EF\u26F6\u26FB-\u26FC\u26FE-\u26FF\u2388\U0001FA00-\U0001FFFD\U0001F0A0-\U0001F0AE\U0001F0B1-\U0001F0BF\U0001F0C1-\U0001F0CF\U0001F0D1-\U0001F0F5\U0001F0AF-\U0001F0B0\U0001F0C0\U0001F0D0\U0001F0F6-\U0001F0FF\U0001F80C-\U0001F80F\U0001F848-\U0001F84F\U0001F85A-\U0001F85F\U0001F888-\U0001F88F\U0001F8AE-\U0001F8FF\U0001F900-\U0001F90F\U0001F91F\U0001F928-\U0001F92F\U0001F931-\U0001F932\U0001F93F\U0001F94C-\U0001F94F\U0001F95F-\U0001F97F\U0001F992-\U0001F9BF\U0001F9C1-\U0001F9FF\U0001F6C6-\U0001F6CA\U0001F6E6-\U0001F6E8\U0001F6EA\U0001F6F1-\U0001F6F2\U0001F6D3-\U0001F6DF\U0001F6ED-\U0001F6EF\U0001F6F7-\U0001F6FF]; 52 $EBG = [\p{Word_Break = EBG}]; 53 $EmojiNRK = [[\p{Emoji}] - [\p{Word_Break = Regional_Indicator}\u002a\u00230-9]]; 54 55 $Han = [:Han:]; 56 $Hiragana = [:Hiragana:]; 57 58 59 # Dictionary character set, for triggering language-based break engines. Currently 60 # limited to LineBreak=Complex_Context. Note that this set only works in Unicode 61 # 5.0 or later as the definition of Complex_Context was corrected to include all 62 # characters requiring dictionary break. 63 64 $Control = [\p{Grapheme_Cluster_Break = Control}]; 65 $HangulSyllable = [\uac00-\ud7a3]; 66 $ComplexContext = [:LineBreak = Complex_Context:]; 67 $KanaKanji = [$Han $Hiragana $Katakana]; 68 $dictionaryCJK = [$KanaKanji $HangulSyllable]; 69 $dictionary = [$ComplexContext $dictionaryCJK]; 70 71 # leave CJK scripts out of ALetterPlus 72 $ALetterPlus = [$ALetter-$dictionaryCJK [$ComplexContext-$Extend-$Control]]; 73 74 75 # 76 # Rules 4 Ignore Format and Extend characters, 77 # except when they appear at the beginning of a region of text. 78 # 79 # TODO: check if handling of katakana in dictionary makes rules incorrect/void 80 $KatakanaEx = $Katakana ($Extend | $Format | $ZWJ)*; 81 $Hebrew_LetterEx = $Hebrew_Letter ($Extend | $Format | $ZWJ)*; 82 $ALetterEx = $ALetterPlus ($Extend | $Format | $ZWJ)*; 83 $Single_QuoteEx = $Single_Quote ($Extend | $Format | $ZWJ)*; 84 $Double_QuoteEx = $Double_Quote ($Extend | $Format | $ZWJ)*; 85 $MidNumLetEx = $MidNumLet ($Extend | $Format | $ZWJ)*; 86 $MidLetterEx = $MidLetter ($Extend | $Format | $ZWJ)*; 87 $MidNumEx = $MidNum ($Extend | $Format | $ZWJ)*; 88 $NumericEx = $Numeric ($Extend | $Format | $ZWJ)*; 89 $ExtendNumLetEx = $ExtendNumLet ($Extend | $Format | $ZWJ)*; 90 $Regional_IndicatorEx = $Regional_Indicator ($Extend | $Format | $ZWJ)*; 91 92 $Ideographic = [\p{Ideographic}]; 93 $HiraganaEx = $Hiragana ($Extend | $Format | $ZWJ)*; 94 $IdeographicEx = $Ideographic ($Extend | $Format | $ZWJ)*; 95 96 ## ------------------------------------------------- 97 98 !!forward; 99 100 101 # Rule 3 - CR x LF 102 # 103 $CR $LF; 104 105 # Rule 3c ZWJ x (Extended_Pict | EmojiNRK). Precedes WB4, so no intervening Extend chars allowed. 106 # 107 $ZWJ ($Extended_Pict | $EmojiNRK); 108 109 110 # Rule 4 - ignore Format and Extend characters, except when they appear at the beginning 111 # of a region of Text. The rule here comes into play when the start of text 112 # begins with a group of Format chars, or with a "word" consisting of a single 113 # char that is not in any of the listed word break categories followed by 114 # format char(s), or is not a CJK dictionary character. 115 [^$CR $LF $Newline]? ($Extend | $Format | $ZWJ)+; 116 117 $NumericEx {100}; 118 $ALetterEx {200}; 119 $HangulSyllable {200}; 120 $Hebrew_LetterEx{200}; 121 $KatakanaEx {400}; # note: these status values override those from rule 5 122 $HiraganaEx {400}; # by virtue of being numerically larger. 123 $IdeographicEx {400}; # 124 125 $E_Base ($Extend | $Format | $ZWJ)*; 126 $E_Modifier ($Extend | $Format | $ZWJ)*; 127 $Extended_Pict ($Extend | $Format | $ZWJ)*; 128 129 # 130 # rule 5 131 # Do not break between most letters. 132 # 133 ($ALetterEx | $Hebrew_LetterEx) ($ALetterEx | $Hebrew_LetterEx) {200}; 134 135 # rule 6 and 7 136 ($ALetterEx | $Hebrew_LetterEx) ($MidLetterEx | $MidNumLetEx | $Single_QuoteEx) ($ALetterEx | $Hebrew_LetterEx) {200}; 137 138 # rule 7a 139 $Hebrew_LetterEx $Single_QuoteEx {200}; 140 141 # rule 7b and 7c 142 $Hebrew_LetterEx $Double_QuoteEx $Hebrew_LetterEx {200}; 143 144 # rule 8 145 146 $NumericEx $NumericEx {100}; 147 148 # rule 9 149 150 ($ALetterEx | $Hebrew_LetterEx) $NumericEx {200}; 151 152 # rule 10 153 154 $NumericEx ($ALetterEx | $Hebrew_LetterEx) {200}; 155 156 # rule 11 and 12 157 158 $NumericEx ($MidNumEx | $MidNumLetEx | $Single_QuoteEx) $NumericEx {100}; 159 160 # rule 13 161 # to be consistent with $KanaKanji $KanaKanhi, changed 162 # from 300 to 400. 163 # See also TestRuleStatus in intltest/rbbiapts.cpp 164 $KatakanaEx $KatakanaEx {400}; 165 166 # rule 13a/b 167 168 $ALetterEx $ExtendNumLetEx {200}; # (13a) 169 $Hebrew_LetterEx $ExtendNumLetEx {200}; # (13a) 170 $NumericEx $ExtendNumLetEx {100}; # (13a) 171 $KatakanaEx $ExtendNumLetEx {400}; # (13a) 172 $ExtendNumLetEx $ExtendNumLetEx {200}; # (13a) 173 174 $ExtendNumLetEx $ALetterEx {200}; # (13b) 175 $ExtendNumLetEx $Hebrew_Letter {200}; # (13b) 176 $ExtendNumLetEx $NumericEx {100}; # (13b) 177 $ExtendNumLetEx $KatakanaEx {400}; # (13b) 178 179 # rule 14 180 # Do not break within emoji modifier sequences 181 182 ($E_Base | $EBG) ($Format | $Extend | $ZWJ)* $E_Modifier; 183 184 # rules 15 - 17 185 # Pairs of Regional Indicators stay together. 186 # With rule chaining disabled by ^, this rule will match exactly two of them. 187 # No other rule begins with a Regional_Indicator, so chaining cannot extend the match. 188 # 189 ^$Regional_IndicatorEx $Regional_IndicatorEx; 190 191 # special handling for CJK characters: chain for later dictionary segmentation 192 $HangulSyllable $HangulSyllable {200}; 193 $KanaKanji $KanaKanji {400}; # different rule status if both kana and kanji found 194 195 196 ## ------------------------------------------------- 197 198 !!reverse; 199 200 $BackHebrew_LetterEx = ($Format | $Extend | $ZWJ)* $Hebrew_Letter; 201 $BackALetterEx = ($Format | $Extend | $ZWJ)* $ALetterPlus; 202 $BackSingle_QuoteEx = ($Format | $Extend | $ZWJ)* $Single_Quote; 203 $BackDouble_QuoteEx = ($Format | $Extend | $ZWJ)* $Double_Quote; 204 $BackMidNumLetEx = ($Format | $Extend | $ZWJ)* $MidNumLet; 205 $BackNumericEx = ($Format | $Extend | $ZWJ)* $Numeric; 206 $BackMidNumEx = ($Format | $Extend | $ZWJ)* $MidNum; 207 $BackMidLetterEx = ($Format | $Extend | $ZWJ)* $MidLetter; 208 $BackKatakanaEx = ($Format | $Extend | $ZWJ)* $Katakana; 209 $BackHiraganaEx = ($Format | $Extend | $ZWJ)* $Hiragana; 210 $BackExtendNumLetEx = ($Format | $Extend | $ZWJ)* $ExtendNumLet; 211 $BackRegional_IndicatorEx = ($Format | $Extend | $ZWJ)* $Regional_Indicator; 212 213 # rule 3 214 $LF $CR; 215 216 # Rule 3c ZWJ x (Extended_Pict | EmojiNRK). Precedes WB4, so no intervening Extend chars allowed. 217 # 218 ($Extended_Pict | $EmojiNRK) $ZWJ; 219 220 # rule 4 221 ($Format | $Extend | $ZWJ)* [^$CR $LF $Newline]?; 222 223 # rule 5 224 225 ($BackALetterEx | $BackHebrew_LetterEx) ($BackALetterEx | $BackHebrew_LetterEx); 226 227 # rule 6 and 7 228 229 ($BackALetterEx | $BackHebrew_LetterEx) ($BackMidLetterEx | $BackMidNumLetEx | $BackSingle_QuoteEx) ($BackALetterEx | $BackHebrew_LetterEx); 230 231 # rule 7a 232 $BackSingle_QuoteEx $BackHebrew_LetterEx; 233 234 # Rule 7b and 7c 235 $BackHebrew_LetterEx $BackDouble_QuoteEx $BackHebrew_LetterEx; 236 237 # rule 8 238 239 $BackNumericEx $BackNumericEx; 240 241 # rule 9 242 243 $BackNumericEx ($BackALetterEx | $BackHebrew_LetterEx); 244 245 # rule 10 246 247 ($BackALetterEx | $BackHebrew_LetterEx) $BackNumericEx; 248 249 # rule 11 and 12 250 251 $BackNumericEx ($BackMidNumEx | $BackMidNumLetEx | $BackSingle_QuoteEx) $BackNumericEx; 252 253 # rule 13 254 255 $BackKatakanaEx $BackKatakanaEx; 256 257 # rules 13 a/b 258 # 259 $BackExtendNumLetEx ($BackALetterEx | $BackHebrew_LetterEx | $BackNumericEx | $BackKatakanaEx | $BackExtendNumLetEx); 260 ($BackALetterEx | $BackHebrew_LetterEx | $BackNumericEx | $BackKatakanaEx) $BackExtendNumLetEx; 261 262 # special handling for CJK characters: chain for later dictionary segmentation 263 $HangulSyllable $HangulSyllable; 264 $KanaKanji $KanaKanji; #different rule status if both kanji and kana found 265 266 # rule 14 267 268 $E_Modifier ($Format | $Extend | $ZWJ)* ($E_Base | $EBG); 269 270 # rule 15 - 17 271 # Pairs of Regional Indicators stay together. 272 273 ^$BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 274 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 275 ^$BackRegional_IndicatorEx $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 276 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 277 278 ($Extended_Pict | $EmojiNRK) $ZWJ $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 279 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 280 ($Extended_Pict | $EmojiNRK) $ZWJ $BackRegional_IndicatorEx $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 281 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 282 283 284 285 ## ------------------------------------------------- 286 287 !!safe_reverse; 288 289 # rule 3 290 ($Extend | $Format | $ZWJ)+ .?; 291 292 # rule 6 293 ($MidLetter | $MidNumLet | $Single_Quote) ($BackALetterEx | $BackHebrew_LetterEx); 294 295 # rule 7b 296 $Double_Quote $BackHebrew_LetterEx; 297 298 299 # rule 11 300 ($MidNum | $MidNumLet | $Single_Quote) $BackNumericEx; 301 302 # rule 13c 303 $BackRegional_IndicatorEx*; 304 305 # For dictionary-based break 306 $dictionary $dictionary; 307 308 ## ------------------------------------------------- 309 310 !!safe_forward; 311 312 # rule 4 313 ($Extend | $Format | $ZWJ)+ .?; 314 315 # rule 6 316 ($MidLetterEx | $MidNumLetEx | $Single_QuoteEx) ($ALetterEx | $Hebrew_LetterEx); 317 318 # rule 7b 319 $Double_QuoteEx $Hebrew_LetterEx; 320 321 # rule 11 322 ($MidNumEx | $MidNumLetEx | $Single_QuoteEx) $NumericEx; 323 324 # rule 13c 325 $Regional_IndicatorEx*; 326 327 # For dictionary-based break 328 $dictionary $dictionary; 329
