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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /intl/icu/source/data/brkitr/rules/word.txt | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'intl/icu/source/data/brkitr/rules/word.txt')
-rw-r--r-- | intl/icu/source/data/brkitr/rules/word.txt | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/intl/icu/source/data/brkitr/rules/word.txt b/intl/icu/source/data/brkitr/rules/word.txt new file mode 100644 index 0000000000..0f0e734d27 --- /dev/null +++ b/intl/icu/source/data/brkitr/rules/word.txt @@ -0,0 +1,172 @@ +# +# Copyright (C) 2016 and later: Unicode, Inc. and others. +# License & terms of use: http://www.unicode.org/copyright.html +# Copyright (C) 2002-2016, International Business Machines Corporation +# and others. All Rights Reserved. +# +# file: word.txt +# +# ICU Word Break Rules +# See Unicode Standard Annex #29. +# These rules are based on UAX #29 Revision 34 for Unicode Version 12.0 +# +# Note: Updates to word.txt will usually need to be merged into +# word_POSIX.txt and word_fi_sv.txt also. + +############################################################################## +# +# Character class definitions from TR 29 +# +############################################################################## + +!!chain; +!!quoted_literals_only; + + +# +# Character Class Definitions. +# + +$Han = [:Han:]; + +$CR = [\p{Word_Break = CR}]; +$LF = [\p{Word_Break = LF}]; +$Newline = [\p{Word_Break = Newline}]; +$Extend = [\p{Word_Break = Extend}-$Han]; +$ZWJ = [\p{Word_Break = ZWJ}]; +$Regional_Indicator = [\p{Word_Break = Regional_Indicator}]; +$Format = [\p{Word_Break = Format}]; +$Katakana = [\p{Word_Break = Katakana}]; +$Hebrew_Letter = [\p{Word_Break = Hebrew_Letter}]; +$ALetter = [\p{Word_Break = ALetter} @]; +$Single_Quote = [\p{Word_Break = Single_Quote}]; +$Double_Quote = [\p{Word_Break = Double_Quote}]; +$MidNumLet = [\p{Word_Break = MidNumLet}]; +$MidLetter = [\p{Word_Break = MidLetter} - [\: \uFE55 \uFF1A]]; +$MidNum = [\p{Word_Break = MidNum}]; +$Numeric = [\p{Word_Break = Numeric}]; +$ExtendNumLet = [\p{Word_Break = ExtendNumLet}]; +$WSegSpace = [\p{Word_Break = WSegSpace}]; +$Extended_Pict = [\p{Extended_Pictographic}]; + +$Hiragana = [:Hiragana:]; +$Ideographic = [\p{Ideographic}]; + + +# Dictionary character set, for triggering language-based break engines. Currently +# limited to LineBreak=Complex_Context. Note that this set only works in Unicode +# 5.0 or later as the definition of Complex_Context was corrected to include all +# characters requiring dictionary break. + +$Control = [\p{Grapheme_Cluster_Break = Control}]; +$HangulSyllable = [\uac00-\ud7a3]; +$ComplexContext = [:LineBreak = Complex_Context:]; +$KanaKanji = [$Han $Hiragana $Katakana]; +$dictionaryCJK = [$KanaKanji $HangulSyllable]; +$dictionary = [$ComplexContext $dictionaryCJK]; + +# TODO: check if handling of katakana in dictionary makes rules incorrect/void + +# leave CJK scripts out of ALetterPlus +$ALetterPlus = [$ALetter-$dictionaryCJK [$ComplexContext-$Extend-$Control]]; + + +## ------------------------------------------------- + +# Rule 3 - CR x LF +# +$CR $LF; + +# Rule 3c Do not break within emoji zwj sequences. +# ZWJ × \p{Extended_Pictographic}. Precedes WB4, so no intervening Extend chars allowed. +# +$ZWJ $Extended_Pict; + +# Rule 3d - Keep horizontal whitespace together. +# +$WSegSpace $WSegSpace; + +# Rule 4 - ignore Format and Extend characters, except when they appear at the beginning +# of a region of Text. + +$ExFm = [$Extend $Format $ZWJ]; + +^$ExFm+; # This rule fires only when there are format or extend characters at the + # start of text, or immediately following another boundary. It groups them, in + # the event there are more than one. + +[^$CR $LF $Newline $ExFm] $ExFm*; # This rule rule attaches trailing format/extends to words, + # with no special rule status value. + +$Numeric $ExFm* {100}; # This group of rules also attach trailing format/extends, but +$ALetterPlus $ExFm* {200}; # with rule status set based on the word's final base character. +$HangulSyllable {200}; +$Hebrew_Letter $ExFm* {200}; +$Katakana $ExFm* {400}; # note: these status values override those from rule 5 +$Hiragana $ExFm* {400}; # by virtue of being numerically larger. +$Ideographic $ExFm* {400}; # + +# +# rule 5 +# Do not break between most letters. +# +($ALetterPlus | $Hebrew_Letter) $ExFm* ($ALetterPlus | $Hebrew_Letter); + +# rule 6 and 7 +($ALetterPlus | $Hebrew_Letter) $ExFm* ($MidLetter | $MidNumLet | $Single_Quote) $ExFm* ($ALetterPlus | $Hebrew_Letter) {200}; + +# rule 7a +$Hebrew_Letter $ExFm* $Single_Quote {200}; + +# rule 7b and 7c +$Hebrew_Letter $ExFm* $Double_Quote $ExFm* $Hebrew_Letter; + +# rule 8 + +$Numeric $ExFm* $Numeric; + +# rule 9 + +($ALetterPlus | $Hebrew_Letter) $ExFm* $Numeric; + +# rule 10 + +$Numeric $ExFm* ($ALetterPlus | $Hebrew_Letter); + +# rule 11 and 12 + +$Numeric $ExFm* ($MidNum | $MidNumLet | $Single_Quote) $ExFm* $Numeric; + +# rule 13 +# to be consistent with $KanaKanji $KanaKanhi, changed +# from 300 to 400. +# See also TestRuleStatus in intltest/rbbiapts.cpp +$Katakana $ExFm* $Katakana {400}; + +# rule 13a/b + +$ALetterPlus $ExFm* $ExtendNumLet {200}; # (13a) +$Hebrew_Letter $ExFm* $ExtendNumLet {200}; # (13a) +$Numeric $ExFm* $ExtendNumLet {100}; # (13a) +$Katakana $ExFm* $ExtendNumLet {400}; # (13a) +$ExtendNumLet $ExFm* $ExtendNumLet {200}; # (13a) + +$ExtendNumLet $ExFm* $ALetterPlus {200}; # (13b) +$ExtendNumLet $ExFm* $Hebrew_Letter {200}; # (13b) +$ExtendNumLet $ExFm* $Numeric {100}; # (13b) +$ExtendNumLet $ExFm* $Katakana {400}; # (13b) + +# rules 15 - 17 +# Pairs of Regional Indicators stay together. +# With incoming rule chaining disabled by ^, this rule will match exactly two of them. +# No other rule begins with a Regional_Indicator, so chaining cannot extend the match. +# +^$Regional_Indicator $ExFm* $Regional_Indicator; + +# special handling for CJK characters: chain for later dictionary segmentation +$HangulSyllable $HangulSyllable {200}; +$KanaKanji $KanaKanji {400}; # different rule status if both kana and kanji found + +# Rule 999 +# Match a single code point if no other rule applies. +.; |