215 lines
5.0 KiB
Plaintext
215 lines
5.0 KiB
Plaintext
#
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# Copyright (C) 2002-2006, International Business Machines Corporation
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# and others. All Rights Reserved.
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#
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# file: word.txt
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#
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# ICU Word Break Rules, POSIX locale.
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# See Unicode Standard Annex #29.
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# These rules are based on Unicode Version 5.0 0
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# Includes post Unicode 5.0 change to treat Japanese half width voicing marks
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# as Extend
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#
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# Note: Updates to word.txt will usually need to be merged into
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# word_POSIX.txt and word_ja.txt also.
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##############################################################################
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#
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# Character class definitions from TR 29
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#
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##############################################################################
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!!chain;
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#
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# Character Class Definitions.
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#
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$VoiceMarks = [\uff9e\uff9f];
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$Format = [\p{Word_Break = Format}];
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$Katakana = [\p{Word_Break = Katakana}-$VoiceMarks];
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$ALetter = [\p{Word_Break = ALetter}];
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$MidLetter = [\p{Word_Break = MidLetter} - [ \:]];
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$MidNum = [\p{Word_Break = MidNum}];
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$Numeric = [\p{Word_Break = Numeric}];
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$ExtendNumLet = [\p{Word_Break = ExtendNumLet}];
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$CR = \u000d;
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$LF = \u000a;
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$Extend = [\p{Grapheme_Cluster_Break = Extend}$VoiceMarks];
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$Control = [\p{Grapheme_Cluster_Break = Control}];
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# Dictionary character set, for triggering language-based break engines. Currently
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# limited to LineBreak=Complex_Context. Note that this set only works in Unicode
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# 5.0 or later as the definition of Complex_Context was corrected to include all
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# characters requiring dictionary break.
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$dictionary = [:LineBreak = Complex_Context:];
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$ALetterPlus = [$ALetter [$dictionary-$Extend-$Control]];
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#
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# Rules 3 Grapheme Clusters behave like their first char.
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# Rule 4 Ignore trailing Format characters (Also see note in TR 29)
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#
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$KatakanaEx = $Katakana ($Extend | $Format)*;
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$ALetterEx = $ALetterPlus ($Extend | $Format)*;
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$MidLetterEx = $MidLetter ($Extend | $Format)*;
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$MidNumEx = $MidNum ($Extend | $Format)*;
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$NumericEx = $Numeric ($Extend | $Format)*;
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$ExtendNumLetEx = $ExtendNumLet ($Extend | $Format)*;
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$Hiragana = [:Hiragana:];
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$Ideographic = [:IDEOGRAPHIC:];
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$HiraganaEx = $Hiragana ($Extend | $Format)*;
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$IdeographicEx = $Ideographic ($Extend | $Format)*;
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## -------------------------------------------------
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!!forward;
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# Rule 3 - CR x LF
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# see character breaks.
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$CR $LF ($Extend | $Format)*;
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# Rule 4 - ignore Format and Extend characters, except when they appear at the beginning
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# of a region of Text. The rule here comes into play when the start of text
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# begins with a group of Format chars, or with a "word" consisting of a single
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# char that is not in any of the listed word break categories followed by
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# format char(s).
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.? ($Extend | $Format)+;
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$NumericEx {100};
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$ALetterEx {200};
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$KatakanaEx {300};
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$HiraganaEx {300};
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$IdeographicEx {400};
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# rule 5
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$ALetterEx $ALetterEx {200};
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# rule 6 and 7
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$ALetterEx $MidLetterEx $ALetterEx {200};
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# rule 8
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$NumericEx $NumericEx {100};
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# rule 9
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$ALetterEx $Format* $NumericEx {200};
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# rule 10
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$NumericEx $ALetterEx {200};
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# rule 11 and 12
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$NumericEx $MidNumEx $NumericEx {100};
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# rule 13
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$KatakanaEx $KatakanaEx {300};
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# rule 13a/b
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$ALetterEx $ExtendNumLetEx {200}; # (13a)
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$NumericEx $ExtendNumLetEx {100}; # (13a)
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$KatakanaEx $ExtendNumLetEx {300}; # (13a)
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$ExtendNumLetEx $ExtendNumLetEx{200}; # (13a)
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$ExtendNumLetEx $ALetterEx {200}; # (13b)
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$ExtendNumLetEx $NumericEx {100}; # (13b)
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$ExtendNumLetEx $KatakanaEx {300}; # (13b)
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## -------------------------------------------------
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!!reverse;
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$BackALetterEx = ($Format | $Extend)* $ALetterPlus;
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$BackNumericEx = ($Format | $Extend)* $Numeric;
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$BackMidNumEx = ($Format | $Extend)* $MidNum;
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$BackMidLetterEx = ($Format | $Extend)* $MidLetter;
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$BackKatakanaEx = ($Format | $Extend)* $Katakana;
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$BackExtendNumLetEx= ($Format | $Extend)* $ExtendNumLet;
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# rule 3
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($Format | $Extend)* $LF $CR;
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# rule 4
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($Format | $Extend)* .?;
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# rule 5
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$BackALetterEx $BackALetterEx;
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# rule 6 and 7
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$BackALetterEx $BackMidLetterEx $BackALetterEx;
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# rule 8
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$BackNumericEx $BackNumericEx;
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# rule 9
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$BackNumericEx $BackALetterEx;
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# rule 10
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$BackALetterEx $BackNumericEx;
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# rule 11 and 12
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$BackNumericEx $BackMidNumEx $BackNumericEx;
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# rule 13
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$BackKatakanaEx $BackKatakanaEx;
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# rules 13 a/b
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#
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($BackALetterEx | $BackNumericEx | $BackKatakanaEx | $BackExtendNumLetEx) $BackExtendNumLetEx;
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$BackExtendNumLetEx ($BackALetterEx | $BackNumericEx | $BackKatakanaEx);
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## -------------------------------------------------
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!!safe_reverse;
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# rule 3
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($Extend | $Format)+ .?;
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# rule 6
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$MidLetter $BackALetterEx;
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# rule 11
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$MidNum $BackNumericEx;
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# For dictionary-based break
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$dictionary $dictionary;
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## -------------------------------------------------
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!!safe_forward;
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# rule 4
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($Extend | $Format)+ .?;
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# rule 6
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$MidLetterEx $ALetterEx;
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# rule 11
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$MidNumEx $NumericEx;
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# For dictionary-based break
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$dictionary $dictionary;
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