#
# Copyright (C) 2016 and later: Unicode, Inc. and others.
# License & terms of use: http://www.unicode.org/copyright.html
# Copyright (c) 2016, International Business Machines Corporation and others. All Rights Reserved.
#
# file: line_normal.txt
#
# Reference Line Break rules for intltest rbbi/RBBIMonkeyTest
#
# Note: Rule syntax and the monkey test itself are still a work in progress.
# They are expected to change with review and the addition of support for rule tailoring.
#
# Line Breaking Rules
# Implement default line breaking as defined by
# Unicode Standard Annex #14 Revision 34 for Unicode 8.0
# http://www.unicode.org/reports/tr14/
# tailored as noted in 2nd paragraph below.
#
# TODO: Rule LB 8 remains as it was in Unicode 5.2
# This is only because of a limitation of ICU break engine implementation,
# not because the older behavior is desirable.
#
# This tailors the line break behavior to correspond to CSS
# line-break=normal (BCP47 -u-lb-normal) as defined for languages other than
# Chinese & Japanese.
# It sets characters of class CJ to behave like ID.
type = line;
locale = en@lb=normal;
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:];
CJ = [:LineBreak = Conditional_Japanese_Starter:];
CL = [:LineBreak = Close_Punctuation:];
CM = [:LineBreak = Combining_Mark:];
CP = [:LineBreak = Close_Parenthesis:];
CR = [:LineBreak = Carriage_Return:];
EB = [[:LineBreak = EB:] \U0001F46A-\U0001F46D\U0001F46F\U0001F91D\U0001F93C];
EM = [:LineBreak = EM:];
EX = [:LineBreak = Exclamation:];
GL = [:LineBreak = Glue:];
HL = [:LineBreak = Hebrew_Letter:];
HY = [:LineBreak = Hyphen:];
H2 = [:LineBreak = H2:];
H3 = [:LineBreak = H3:];
ID = [[:LineBreak = Ideographic:] CJ]; # CSS Normal tailoring: CJ resolves to ID
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:];
RI = [:LineBreak = Regional_Indicator:];
SA = [:LineBreak = Complex_Context:];
SG = [:LineBreak = Surrogate:];
SP = [:LineBreak = Space:];
SY = [:LineBreak = Break_Symbols:];
WJ = [:LineBreak = Word_Joiner:];
XX = [:LineBreak = Unknown:];
ZW = [:LineBreak = ZWSpace:];
ZWJ = [:LineBreak = ZWJ:];
EmojiNRK = [[\p{Emoji}] - [[RI]\u002a\u00230-9©®™〰〽]];
# Data for Extended Pictographic scraped from CLDR common/properties/ExtendedPictographic.txt, r13267
Extended_Pict = [\U0001F774-\U0001F77F\U00002700-\U00002701\U00002703-\U00002704\U0000270E\U00002710-\U00002711\U00002765-\U00002767\U0001F030-\U0001F093\U0001F094-\U0001F09F\U0001F10D-\U0001F10F\U0001F12F\U0001F16C-\U0001F16F\U0001F1AD-\U0001F1E5\U0001F260-\U0001F265\U0001F203-\U0001F20F\U0001F23C-\U0001F23F\U0001F249-\U0001F24F\U0001F252-\U0001F25F\U0001F266-\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\U00002605\U00002607-\U0000260D\U0000260F-\U00002610\U00002612\U00002616-\U00002617\U00002619-\U0000261C\U0000261E-\U0000261F\U00002621\U00002624-\U00002625\U00002627-\U00002629\U0000262B-\U0000262D\U00002630-\U00002637\U0000263B-\U00002647\U00002654-\U0000265F\U00002661-\U00002662\U00002664\U00002667\U00002669-\U0000267A\U0000267C-\U0000267E\U00002680-\U00002691\U00002695\U00002698\U0000269A\U0000269D-\U0000269F\U000026A2-\U000026A9\U000026AC-\U000026AF\U000026B2-\U000026BC\U000026BF-\U000026C3\U000026C6-\U000026C7\U000026C9-\U000026CD\U000026D0\U000026D2\U000026D5-\U000026E8\U000026EB-\U000026EF\U000026F6\U000026FB-\U000026FC\U000026FE-\U000026FF\U00002388\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-\U0001F90B\U0001F91F\U0001F928-\U0001F92F\U0001F931-\U0001F932\U0001F94C\U0001F95F-\U0001F96B\U0001F992-\U0001F997\U0001F9D0-\U0001F9E6\U0001F90C-\U0001F90F\U0001F93F\U0001F94D-\U0001F94F\U0001F96C-\U0001F97F\U0001F998-\U0001F9BF\U0001F9C1-\U0001F9CF\U0001F9E7-\U0001F9FF\U0001F6C6-\U0001F6CA\U0001F6D3-\U0001F6D4\U0001F6E6-\U0001F6E8\U0001F6EA\U0001F6F1-\U0001F6F2\U0001F6F7-\U0001F6F8\U0001F6D5-\U0001F6DF\U0001F6ED-\U0001F6EF\U0001F6F9-\U0001F6FF];
# LB1 - Resolve AI, CB, CJ, SA, SG, and XX into other line breaking classes
AL = [AL AI SG XX ];
dictionary = SA;
# By LB9, a ZWJ also behaves as a CM. Including it in the definition of CM avoids having to explicitly
# list it in the numerous rules that use CM.
CM = [CM ZWJ];
LB4: BK ÷;
LB5: CR LF;
LB5.1: CR ÷;
LB5.2: LF ÷;
LB5.3: NL ÷;
LB6: . (BK | CR | LF | NL);
LB6.1: [^BK CR LF NL SP ZW] CM* (BK | CR | LF | NL);
# Rules LB14 - LB17.
# Moved before LB7, because they can match a longer sequence that would also match LB7,
# for example, the sequence "OP CM SP AL" matches LB14 while the prefix of it,
# "while only the prefix "OP CM SP" matches LB7.1
LB14: OP CM* SP* .;
LB15: QU CM* SP* OP;
LB16: (CL | CP)CM* SP* NS;
LB17: B2 CM* SP* B2;
LB7.1: [^ZW SP] CM* [SP ZW];
LB7.2: [ZW SP] [SP ZW];
# LB8, ICU differs from UAX-14,
# ICU: ZW ÷;
# UAX 14: ZW SP* ÷;
LB8: ZW ÷;
# LB8a
# ZWJ x (ID | Extended_Pict | EmojiNRK)
LB8a: ZWJ (ID | Extended_Pict | EmojiNRK);
# LB9: X CM -> X
# LB10: Unattached CM -> AL
#LB11: × WJ;
# WJ ×
LB11.1: [^BK CR LF NL SP ZW] CM* WJ;
LB11.2: SP WJ;
LB11.3: WJ CM* [^CM];
LB12: GL CM* [^CM];
LB12a: [^SP BA HY] CM* GL;
# LB 13 ICU Tailoring, matches tailoring exmaple 8 from UAX 14.
#
# LB13.1 [^SP] CM* [CL CP EX IS SY] # original UAX 14 rule.
# LB13.2 SP CM* [CL CP EX IS SY]
LB13.1: [^NU SP] CM* [CL CP IS SY];
LB13.2: [^SP] CM* EX;
LB13.2: SP [CL CP EX IS SY];
# LB 14-17 are moved above LB 7.
LB18: SP ÷;
LB19: . CM* QU;
LB19.1: QU CM* [^CM];
# LB 20 Break before and after CB.
# Interaction with LB8a: ZWJ x ID is tricky because CM includes ZWJ.
# ZWJ acts like a CM to the left, combining with CB.
# ZWJ acts independently to the right, no break from ID by LB8a.
LB20: . CM* ÷ CB;
LB20.1a: CB CM* ZWJ (ID | Extended_Pict | EmojiNRK);
LB20.1b: CB CM* ÷;
# Note: Rule 21a must come before 21 to prevent 21.1 from matching HL BA, then
# not picking up the continuing match after the BA from 21a.
LB21a: HL CM* (HY | BA) CM* [^CM CB];
LB21.1: . CM* [BA HY NS];
LB21.2: BB CM* [^CM CB];
LB21b: SY CM* HL;
LB22.1: (AL | HL | CM) CM* IN; # The CM is from LB10, treat an unattached CM as AL.
LB22.2: EX CM* IN;
LB22.3: (ID | EB | EM) CM* IN;
LB22.4: IN CM* IN;
LB22.5: NU CM* IN;
LB23.1: (AL | HL | CM) CM* NU;
LB23.2: NU CM* (AL | HL);
LB23a.1: PR CM* (ID | EB | EM);
LB23a.2: (ID | EB | EM) CM* PO;
LB24.2: (PR | PO) CM* (AL | HL);
LB24.3: (AL | HL | CM) CM* (PR | PO);
# Numbers. Equivalent to Tailoring example 8 from UAx 14.
LB25: ((PR | PO)CM*)? ((OP | HY)CM*)? NU (CM*(NU | SY | IS))* (CM*(CL | CP))? (CM*(PR | PO))?;
LB26.1: JL CM* (JL | JV | H2 | H3);
LB26.2: (JV | H2) CM* (JV | JT);
LB26.3: (JT | H3) CM* JT;
LB27.1: (JL | JV | JT | H2 | H3) CM* IN;
LB27.2: (JL | JV | JT | H2 | H3) CM* PO;
LB27.3: PR CM* (JL | JV | JT | H2 | H3);
# LB28 Do not break between Alphabetics.
# Unattached (leading) CM treated as AL.
LB28: (AL | HL | CM)CM* (AL | HL);
LB29: IS CM* (AL | HL);
# LB30 is adjusted for unattached leading CM being treated as AL.
LB30.1: (AL | CM | HL | NU) CM* OP;
LB30.2: CP CM* (AL | HL | NU);
# LB31 keep pairs of RI together.
LB30a.1: RI CM* RI CM* [BK CR LF NL SP ZW WJ GL CL CP EX IS SY QU BA HY NS];
LB30a.2: RI CM* RI CM* ZWJ (ID | Extended_Pict | EmojiNRK);
LB30a.3: RI CM* RI CM* ÷;
# LB30b Do not break between Emoji Base and Emoji Modifier
LB30b: EB CM* EM;
# LB31 Break Everywhere Else.
# Include combining marks
LB31.1: . CM* ZWJ (ID | Extended_Pict | EmojiNRK);
LB31.2: . CM* ÷;