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#
# Copyright (C) 2016 and later: Unicode, Inc. and others.
# Copyright (c) 2016, International Business Machines Corporation and others. All Rights Reserved.
#
# file: line_loose.txt
#
# Reference Line Break rules for intltest rbbi/RBBIMonkeyTest.
# Rules derived from Unicode Standard Annex #14 for Unicode 16.0.
#
# 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.
#
# This tailors the line break behavior to correspond to CSS
# line-break=loose (BCP47 -u-lb-loose) as defined for languages other than
# Chinese & Japanese.
# It sets characters of class CJ to behave like ID.
# In addition, it allows breaks:
# * before iteration marks 3005, 303B, 309D, 309E, 30FD, 30FE (all NS)
# * between characters of LineBreak class IN
type = line;
locale = en@lb=loose;
AI = [:LineBreak = Ambiguous:];
AK = [:LineBreak = Aksara:];
AL = [:LineBreak = Alphabetic:];
AP = [:LineBreak = Aksara_Prebase:];
AS = [:LineBreak = Aksara_Start:];
BA = [:LineBreak = Break_After:];
HH = [\u2010]; # \u2010 is HYPHEN, default line break is BA.
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:];
CMS = [:LineBreak = Combining_Mark:];
CP = [:LineBreak = Close_Parenthesis:];
CR = [:LineBreak = Carriage_Return:];
EB = [:LineBreak = EB:];
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:];
NSX = [\u3005 \u303B \u309D \u309E \u30FD \u30FE];
NS = [[:LineBreak = Nonstarter:] - NSX];
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:];
VF = [:LineBreak = Virama_Final:];
VI = [:LineBreak = Virama:];
WJ = [:LineBreak = Word_Joiner:];
XX = [:LineBreak = Unknown:];
ZW = [:LineBreak = ZWSpace:];
ZWJ = [:LineBreak = ZWJ:];
# OP30 and CP30 are variants of OP and CP that appear in rule LB30 from UAX 14.
# Limitations of this monkey test rule parser require that these definitions be pulled out
# rather than appearing in-line in LB 30.
OP30 = [OP - [\p{ea=F}\p{ea=W}\p{ea=H}]];
CP30 = [CP - [\p{ea=F}\p{ea=W}\p{ea=H}]];
eaFWH = [\p{ea=F}\p{ea=W}\p{ea=H}];
eaFWHminusCMOPGL = [ eaFWH - [CMS OP GL] ];
eaFWHminusCM = [ eaFWH - CMS ];
eaFWHBreakableAtLB19 = [ eaFWH - [NS BA EX CL IN IS GL CMS] ];
BAminuseaFWH = [BA - eaFWH ];
PiQU = [\p{Pi}&QU];
PfQU = [\p{Pf}&QU];
# The redundant-looking inner brackets are required for the current parser in the test code.
ExtPictUnassigned = [[\p{Extended_Pictographic}]&[\p{Cn}]];
# 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 = [CMS 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);
# LB8 break after ZW SP*.
# Precedes LB7 because both rules will match the sequences like ZW SP,
# and LB8 must take precedence.
LB8: ZW SP* ÷ [^ZW SP BK CR LF NL];
# Numbers. Equivalent to Tailoring example 8 from UAX 14.
# Moved up, before LB14, because it can match longer sequences which must take precedence.
LB25: ((PR | PO)CM*)? ((OP | HY)CM*)? (IS CM*)? NU (CM*(NU | SY | IS))* (CM*(CL | CP))? (CM*(PR | PO))?;
# Rules LB14 - LB17.
# Moved before LB14, because it matches a supersequence.
LB20a.3: ( OP CM* SP* | QU CM* | GL CM* ) (PiQU CM* SP*)+ SP (HY | HH) CM* AL;
LB15a.1: ( OP CM* SP* | QU CM* | GL CM* ) (PiQU CM* SP*)+ .;
# Moved before LB14. These are really the cases where LB19a does not apply, but
# the old LB19 would. This is to avoid many instances of chaining over two code
# points.
LB19a.1: eaFWHminusCMOPGL ÷ PiQU CM* eaFWHminusCM;
LB19a.2: eaFWHminusCMOPGL CM* CMS ÷ PiQU CM* eaFWHminusCM;
LB19a.5: eaFWHminusCM CM* PfQU ÷ eaFWHBreakableAtLB19;
LB19a.6: eaFWHminusCM CM* PfQU CM* CMS ÷ eaFWHBreakableAtLB19;
# Moved up, 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, "OP CM SP" matches LB7.1
LB20a.7: OP CM* SP+ (HY | HH) CM* AL;
LB14: OP CM* SP* .;
LB20a.4: ^ (PiQU CM* SP*)+ SP (HY | HH) CM* AL;
LB15a.2: ^ (PiQU CM* SP*)+ .;
# LB15b/LB15a chaining.
LB20a.5: ([^SP] CM* | SP) PfQU CM* (PiQU CM* SP*)+ SP (HY | HH) CM* AL;
LB15b.1: ([^SP] CM* | SP) PfQU CM* (PiQU CM* SP*)+ .;
LB15b.2: ([^SP] CM* | SP) PfQU CM* ( SP | GL | WJ | CL | QU | CP | EX | IS | SY | BK | CR | LF | NL | ZW | $ );
# LB 15c Break before an IS that begins a number and follows a space.
LB15c: SP ÷ IS CM* NU;
# LB15d × IS
LB15d.1: [^SP] CM* IS;
LB15d.2: SP IS;
LB16: (CL | CP)CM* SP* NS;
LB17: B2 CM* SP* B2;
# LB7 Do not break before spaces or zero width space.
LB7.1: [^ZW SP] CM* [SP ZW];
LB7.2: [ZW SP] [SP ZW];
# LB8a
# ZWJ x
# Don't match a CM on the right - let other rules pick up CM sequences, where
# the ZWJ behaves as just another generic CM.
LB8a: ZWJ [^CM];
# LB9: X CM -> X
# LB10: Unattached CM -> AL
#LB11: × WJ;
# WJ ×
LB11.1: [^SP] CM* WJ;
LB11.2: SP WJ;
LB11.3: WJ CM* [^CM];
# Needs to apply before LB12, because the new monkeys are not greedy.
LB20a.2: GL CM* (HY | HH) CM* AL;
LB12: GL CM* [^CM];
LB12a: [^SP BA HY] CM* GL;
# LB 13 Do not break before ‘]’ or ‘!’ or ‘/’, even after spaces.
LB13.1: [^SP] CM* [CL CP EX SY];
LB13.2: SP [CL CP EX 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 . 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 after by LB8a.
LB20.1: . CM* ZWJ CB;
LB20.2: . CM* ÷ CB;
LB20a.6: CB CM* ZWJ (HY | HH) CM* AL;
LB20.3: CB CM* ZWJ [^CM];
LB20.4: CB CM* ÷;
# LB 20a Do not break after a word-initial hyphen.
LB20a.1: ^(HY | HH) CM* AL;
# 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 | BAminuseaFWH) CM* [^CM CB HL];
LB21.1: . CM* [BA HY NS];
LB21.2: BB CM* [^CM CB];
LB21b: SY CM* HL;
LB22: [^IN] CM* IN; # For CSS Loose, allow breaks between adjacent ellipses characters.
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);
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* PO;
LB27.2: 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);
LB28: (AP CM*)? (AS | AK | [◌] ) (CM* VI CM* (AK | [◌] ))* (CM* VI | ((CM* (AS | AK | [◌] ) )? CM* VF))?;
LB29: IS CM* (AL | HL);
# LB30 is adjusted for unattached leading CM being treated as AL.
LB30.1: (AL | CM | HL | NU) CM* OP30;
LB30.2: CP30 CM* (AL | HL | NU);
# LB30a keep pairs of RI together.
LB30a.1: RI CM* RI ÷ [^BK CR LF NL SP ZW WJ CL CP EX IS SY GL QU BA HY NS IN CM];
LB30a.2: RI CM* RI CM* CMS ÷ [^BK CR LF NL SP ZW WJ CL CP EX IS SY GL QU BA HY NS IN CM];
LB30a.3: RI CM* RI CM* [BK CR LF NL SP ZW WJ GL CL CP EX IS SY QU BA HY NS IN ZWJ]?;
# LB30b Do not break between Emoji Base (or potential emoji) and Emoji Modifier
LB30b.1: EB CM* EM;
LB30b.2: ExtPictUnassigned CM* EM;
# LB31 Break Everywhere Else.
# Include combining marks
LB31.1: . CM* ZWJ [^CM];
LB31.2: . CM* ÷;