# # 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_loose.txt # # Reference Line Break rules for intltest rbbi/RBBIMonkeyTest. # Rules derived from Unicode Standard Annex #14 Revision 40 for Unicode 11.0 # # 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:]; 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:]; 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:]; WJ = [:LineBreak = Word_Joiner:]; XX = [:LineBreak = Unknown:]; ZW = [:LineBreak = ZWSpace:]; ZWJ = [:LineBreak = ZWJ:]; # 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 # 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]; 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 . 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; LB20.3: CB CM* ZWJ [^CM]; LB20.4: 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; # delete this rule for CSS loose. 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); # 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 CM]; LB30a.2: RI CM* RI CM* [CM-ZWJ] ÷ [^BK CR LF NL SP ZW WJ CL CP EX IS SY GL QU BA HY NS CM]; LB30a.3: RI CM* RI CM* [BK CR LF NL SP ZW WJ GL CL CP EX IS SY QU BA HY NS ZWJ]?; # 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 [^CM]; LB31.2: . CM* ÷;