422 lines
8.5 KiB
Plaintext
422 lines
8.5 KiB
Plaintext
# Copyright (c) 2002-2004 International Business Machines Corporation and
|
|
# others. All Rights Reserved.
|
|
#
|
|
# file: line.txt
|
|
#
|
|
# Line Breaking Rules
|
|
# Implement default line breaking as defined by Unicode TR 14.
|
|
#
|
|
|
|
|
|
#
|
|
# Character Classes defined by TR 14.
|
|
#
|
|
|
|
!!chain;
|
|
!!LBCMNoChain;
|
|
!!lookAheadHardBreak;
|
|
|
|
$AI = [:LineBreak = Ambiguous:];
|
|
$AL = [:LineBreak = Alphabetic:];
|
|
$BA = [:LineBreak = Break_After:];
|
|
$BB = [:LineBreak = Break_Before:];
|
|
$BK = [:LineBreak = Mandatory_Break:];
|
|
$B2 = [:LineBreak = Break_Both:];
|
|
$CB = [:LineBreak = Contingent_Break:];
|
|
$CL = [:LineBreak = Close_Punctuation:];
|
|
$CM = [:LineBreak = Combining_Mark:];
|
|
$CR = [:LineBreak = Carriage_Return:];
|
|
$EX = [:LineBreak = Exclamation:];
|
|
$GL = [:LineBreak = Glue:];
|
|
$HY = [:LineBreak = Hyphen:];
|
|
$H2 = [:LineBreak = H2:];
|
|
$H3 = [:LineBreak = H3:];
|
|
$ID = [:LineBreak = Ideographic:];
|
|
$IN = [:LineBreak = Inseperable:];
|
|
$IS = [:LineBreak = Infix_Numeric:];
|
|
$JL = [:LineBreak = JL:];
|
|
$JV = [:LineBreak = JV:];
|
|
$JT = [:LineBreak = JT:];
|
|
$LF = [:LineBreak = Line_Feed:];
|
|
$NL = [:LineBreak = Next_Line:];
|
|
$NS = [:LineBreak = Nonstarter:];
|
|
$NU = [:LineBreak = Numeric:];
|
|
$OP = [:LineBreak = Open_Punctuation:];
|
|
$PO = [:LineBreak = Postfix_Numeric:];
|
|
$PR = [:LineBreak = Prefix_Numeric:];
|
|
$QU = [:LineBreak = Quotation:];
|
|
$SA = [:LineBreak = Complex_Context:];
|
|
$SG = [:LineBreak = Surrogate:];
|
|
$SP = [:LineBreak = Space:];
|
|
$SY = [:LineBreak = Break_Symbols:];
|
|
$WJ = [:LineBreak = Word_Joiner:];
|
|
$XX = [:LineBreak = Unknown:];
|
|
$ZW = [:LineBreak = ZWSpace:];
|
|
|
|
|
|
#
|
|
# Rule LB1. By default, treat AI (characters with ambiguous east Asian width),
|
|
# SA (South East Asian: Thai, Lao, Khmer)
|
|
# XX (Unknown, unassigned)
|
|
# as $AL (Alphabetic)
|
|
#
|
|
$ALPlus = $AL | $AI | $SA | $XX;
|
|
|
|
#
|
|
# Combining Marks. X $CM* behaves as if it were X. Rule LB6.
|
|
#
|
|
$ALcm = $ALPlus $CM*;
|
|
$BAcm = $BA $CM*;
|
|
$BBcm = $BB $CM*;
|
|
$B2cm = $B2 $CM*;
|
|
$CLcm = $CL $CM*;
|
|
$EXcm = $EX $CM*;
|
|
$GLcm = $GL $CM*;
|
|
$HYcm = $HY $CM*;
|
|
$H2cm = $H2 $CM*;
|
|
$H3cm = $H3 $CM*;
|
|
$IDcm = $ID $CM*;
|
|
$INcm = $IN $CM*;
|
|
$IScm = $IS $CM*;
|
|
$JLcm = $JL $CM*;
|
|
$JVcm = $JV $CM*;
|
|
$JTcm = $JT $CM*;
|
|
$NScm = $NS $CM*;
|
|
$NUcm = $NU $CM*;
|
|
$OPcm = $OP $CM*;
|
|
$POcm = $PO $CM*;
|
|
$PRcm = $PR $CM*;
|
|
$QUcm = $QU $CM*;
|
|
$SPcm = $SP $CM*;
|
|
$SYcm = $SY $CM*;
|
|
$WJcm = $WJ $CM*;
|
|
|
|
## -------------------------------------------------
|
|
|
|
!!forward;
|
|
|
|
#
|
|
# Each class of character can stand by itself as an unbroken token, with trailing combining stuff
|
|
#
|
|
$ALPlus $CM+;
|
|
$BA $CM+;
|
|
$BB $CM+;
|
|
$B2 $CM+;
|
|
$CL $CM+;
|
|
$EX $CM+;
|
|
$GL $CM+;
|
|
$HY $CM+;
|
|
$H2 $CM+;
|
|
$H3 $CM+;
|
|
$ID $CM+;
|
|
$IN $CM+;
|
|
$IS $CM+;
|
|
$JL $CM+;
|
|
$JV $CM+;
|
|
$JT $CM+;
|
|
$NS $CM+;
|
|
$NU $CM+;
|
|
$OP $CM+;
|
|
$PO $CM+;
|
|
$PR $CM+;
|
|
$QU $CM+;
|
|
$SP $CM+;
|
|
$SY $CM+;
|
|
$WJ $CM+;
|
|
|
|
|
|
#
|
|
# Rule LB 3
|
|
$LB3Breaks = [$BK $CR $LF $NL];
|
|
$LB3NonBreaks = [^$BK $CR $LF $NL];
|
|
$LB5NonBreaks = [[$LB3NonBreaks] - [$ZW]];
|
|
|
|
$LB3NonBreaks? $LB3Breaks {100};
|
|
$LB5NonBreaks $CM* $LB3Breaks {100};
|
|
$CR $LF {100};
|
|
|
|
# LB 4 x SP
|
|
# x ZW
|
|
$ZW [$SP $ZW];
|
|
$LB5NonBreaks $CM* [$SP $ZW];
|
|
|
|
# LB 5 Break after zero width space
|
|
$LB5Breaks = [$LB3Breaks $ZW];
|
|
|
|
|
|
# LB 7 Combining marks. $SP $CM needs to behave like $ID.
|
|
# X $CM needs to behave like X, where X is not $SP.
|
|
# $CM not covered by the above needs to behave like $AL
|
|
#
|
|
$LB5NonBreaks $CM+; # Stick together any combining sequences that don't match other rules.
|
|
|
|
# LB 8
|
|
$LB5NonBreaks $CM* $CL;
|
|
$LB5NonBreaks $CM* $EX;
|
|
$LB5NonBreaks $CM* $IS;
|
|
$LB5NonBreaks $CM* $SY;
|
|
|
|
# LB 9
|
|
$OPcm $SP* .?;
|
|
$OPcm $SP* $LB5NonBreaks $CM*;
|
|
|
|
# LB 10
|
|
$QUcm $SP* $OPcm;
|
|
|
|
# LB 11
|
|
$CLcm $SP* $NScm;
|
|
|
|
# LB 11a
|
|
($B2cm)+;
|
|
|
|
# LB 11b Word Joiner
|
|
$LB5NonBreaks $CM* $WJcm;
|
|
$WJcm .?;
|
|
|
|
# LB 12
|
|
$LB12NonBreaks = [$LB5NonBreaks - $SP];
|
|
|
|
# LB 13
|
|
# x GL
|
|
$LB12NonBreaks $CM* $GLcm;
|
|
$SP $CM+ $GLcm; # LB7a SP CM+ behaves as ID
|
|
|
|
# GL x
|
|
$GLcm .?;
|
|
$GLcm $LB12NonBreaks $CM*; # Don't let a combining mark go onto $CR, $BK, etc.
|
|
$GLcm $SP $CM+; # SP CM+ behaves as ID
|
|
|
|
# LB 14
|
|
# x QU
|
|
$LB12NonBreaks $CM* $QUcm;
|
|
$SP $CM+ $QUcm; # LB7a SP CM+ behaves as ID
|
|
|
|
# QU x
|
|
$QUcm .?;
|
|
$QUcm $LB12NonBreaks $CM*; # Don't let a combining mark go onto $CR, $BK, etc.
|
|
$QUcm $SP $CM+; # SP CM+ behaves as ID
|
|
|
|
# LB 14a
|
|
$LB14NonBreaks = [$LB12NonBreaks - $CB];
|
|
$LB14CanBreakAfter = $LB14NonBreaks $CM* | $SP $CM+;
|
|
|
|
# LB 15
|
|
$LB14CanBreakAfter ($BAcm | $HYcm | $NScm);
|
|
$BBcm [^$CB];
|
|
$BBcm [^$CB $CR $LF $BK $NL $ZW] $CM*;
|
|
|
|
# LB 16
|
|
$ALcm $INcm;
|
|
$CM+ $INcm; # by rule 7c, any otherwise unattached CM behaves as AL
|
|
$IDcm $INcm;
|
|
$SP $CM+ $INcm; # by rule 7a, $SP $CM behaves like ID
|
|
$INcm $INcm;
|
|
$NUcm $INcm;
|
|
|
|
|
|
# $LB 17
|
|
($IDcm | $SP $CM+) $POcm;
|
|
$ALcm+ $NUcm; # includes $LB19
|
|
$CM+ $NUcm; # Rule 7c
|
|
$NUcm $ALcm+;
|
|
|
|
# LB 18
|
|
$PRcm? ($OPcm | $HYcm)? $NUcm ($NUcm | $SYcm | $IScm)* $CLcm? $POcm?;
|
|
$PRcm $ALcm;
|
|
$PRcm $IDcm;
|
|
|
|
# LB 18b Do not break a Korean syllable
|
|
$JLcm ($JLcm | $JVcm | $H2cm | $H3cm);
|
|
($JVcm | $H2cm) ($JVcm | $JTcm);
|
|
($JTcm | $H3cm) $JTcm;
|
|
|
|
# LB 18c Treat korean Syllable Block the same as ID (don't break it)
|
|
($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $INcm;
|
|
($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $POcm;
|
|
$PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm);
|
|
|
|
|
|
# LB 19
|
|
$CM* $ALcm+; # The $CM* is from rule 7C, and unattached CM is treated as AL
|
|
$IScm $ALcm;
|
|
|
|
#
|
|
# Reverse Rules.
|
|
#
|
|
## -------------------------------------------------
|
|
|
|
!!reverse;
|
|
|
|
$CM+ $ALPlus;
|
|
$CM+ $BA;
|
|
$CM+ $BB;
|
|
$CM+ $B2;
|
|
$CM+ $CL;
|
|
$CM+ $EX;
|
|
$CM+ $GL;
|
|
$CM+ $HY;
|
|
$CM+ $H2;
|
|
$CM+ $H3;
|
|
$CM+ $ID;
|
|
$CM+ $IN;
|
|
$CM+ $IS;
|
|
$CM+ $JL;
|
|
$CM+ $JV;
|
|
$CM+ $JT;
|
|
$CM+ $NS;
|
|
$CM+ $NU;
|
|
$CM+ $OP;
|
|
$CM+ $PO;
|
|
$CM+ $PR;
|
|
$CM+ $QU;
|
|
$CM+ $SP;
|
|
$CM+ $SY;
|
|
$CM+ $WJ;
|
|
|
|
# LB 3
|
|
|
|
$LB3Breaks $LB3NonBreaks;
|
|
$LB3Breaks $CM* $LB5NonBreaks;
|
|
$LF $CR;
|
|
|
|
# LB 4 x SP
|
|
# x ZW
|
|
[$SP $ZW] $LB3NonBreaks;
|
|
[$SP $ZW] $CM* $LB5NonBreaks;
|
|
|
|
# LB 5 Break after zero width space
|
|
|
|
|
|
# LB 7 Combining marks.
|
|
# $SP $CM needs to behave like $ID.
|
|
# X $CM needs to behave like X, where X is not $SP.
|
|
# $CM not covered by the above needs to behave like $AL
|
|
# Stick together any combining sequences that don't match other rules.
|
|
$CM+ $LB5NonBreaks;
|
|
|
|
# LB 8
|
|
$CL $CM* $LB5NonBreaks;
|
|
$EX $CM* $LB5NonBreaks;
|
|
$IS $CM* $LB5NonBreaks;
|
|
$SY $CM* $LB5NonBreaks;
|
|
|
|
# LB 9
|
|
$LB5NonBreaks $SP* $CM* $OP;
|
|
|
|
# LB 10
|
|
$CM* $OP $SP* $CM* $QU;
|
|
|
|
# LB 11
|
|
$CM* $NS $SP* $CM* $CL;
|
|
|
|
# LB 11a
|
|
($CM* $B2)+;
|
|
|
|
# LB 11b
|
|
$CM* $WJ $CM* $LB5NonBreaks;
|
|
$CM* $LB5NonBreaks $CM* $WJ;
|
|
. $CM* $WJ;
|
|
|
|
# LB 12
|
|
|
|
# LB 14
|
|
$CM* $GL $CM* $LB12NonBreaks;
|
|
$CM* $GL $CM+ $SP;
|
|
$CM* $LB5NonBreaks $CM* $GL;
|
|
|
|
# LB 14
|
|
$CM* $QU $CM* $LB12NonBreaks;
|
|
$CM* $QU $CM+ $SP; # CM+ SP behaves as ID
|
|
$CM* $LB5NonBreaks $CM* $QU;
|
|
|
|
# LB 14a
|
|
$BackLB14CanBreakAfter = ($CM* [$LB14NonBreaks - $CM]) | ($CM+ $SP);
|
|
|
|
# LB 15
|
|
$CM* ($BA | $HY | $NS) $BackLB14CanBreakAfter;
|
|
($CM* ($BA | $HY | $NS))+ $CM+ / $LB5Breaks;
|
|
[$CR $LF $BK $NL $ZW] $CM* $BB;
|
|
$CM* [^$CB $CR $LF $BK $NL $ZW] $CM* $BB;
|
|
|
|
# LB 16
|
|
$CM* $IN $CM* $ALPlus;
|
|
# by rule 7c, any otherwise unattached CM behaves as AL
|
|
$CM* $IN $CM+ / $LB5Breaks;
|
|
|
|
$CM* $IN $CM* ($ID | $CM $SP);
|
|
$CM* $IN $CM* $IN;
|
|
$CM* $IN $CM* $NU;
|
|
|
|
# $LB 17
|
|
$CM* $PO $CM* ($ID | $CM $SP);
|
|
$CM* $NU ($CM* $ALPlus)+; # includes $LB19
|
|
$CM* $NU $CM+ / $LB5Breaks; # Rule 7c
|
|
|
|
$CM* $ALPlus $CM* $NU;
|
|
|
|
# LB 18
|
|
($CM* $PO)? ($CM* $CL)? ($CM* ($NU | $IS | $SY))* $CM* $NU ($CM* ($OP | $HY))? ($CM* $PR)?;
|
|
$CM* $ALPlus $CM* $PR;
|
|
$CM* $ID $CM* $PR;
|
|
|
|
# LB 18b
|
|
$CM* ($H3 | $H2 | $JV | $JL) $CM* $JL;
|
|
$CM* ($JT | $JV) $CM* ($H2 | $JV);
|
|
$CM* $JT $CM* ($H3 | $JT);
|
|
|
|
# LB 18c
|
|
$CM* $IN $CM* ($H3 | $H2 | $JT | $JV | $JL);
|
|
$CM* $PO $CM* ($H3 | $H2 | $JT | $JV | $JL);
|
|
$CM* ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR;
|
|
|
|
# LB 19
|
|
$CM* $ALPlus $CM* $ALPlus;
|
|
# The $CM* is from rule 7C, and unattached CM is treated as AL
|
|
$CM* $ALPlus $CM* $IS;
|
|
$CM* $ALPlus $CM+ / $LB5Breaks;
|
|
|
|
## problem state table can't handle lookahead when it is at the
|
|
## start of the string, currently handled in the rbbi code
|
|
## todo fix this
|
|
|
|
## -------------------------------------------------
|
|
|
|
!!safe_reverse;
|
|
|
|
# LB 7
|
|
$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
|
|
$CM+ $SP / .;
|
|
|
|
# LB 9
|
|
$SP+ $CM* $OP;
|
|
|
|
# LB 10
|
|
$SP+ $CM* $QU;
|
|
|
|
# LB 11
|
|
$SP+ $CM* $CL;
|
|
|
|
# LB 18
|
|
($CM* ($IS | $SY))+ $CM* $NU;
|
|
$CL $CM* ($NU | $IS | $SY);
|
|
|
|
## -------------------------------------------------
|
|
|
|
!!safe_forward;
|
|
|
|
# LB 7
|
|
[^$BK $CR $LF $NL $ZW $SP] $CM+;
|
|
$SP $CM+ / [^$CM];
|
|
|
|
# LB 9
|
|
$OP $CM* $SP+;
|
|
|
|
# LB 10
|
|
$QU $CM* $SP+;
|
|
|
|
# LB 11
|
|
$CL $CM* $SP+;
|
|
|
|
# LB 18
|
|
$CM* $PRcm? ($OPcm | $HYcm)? $NU;
|