i18n: Add i18next plural rules and selector

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Samantaz Fox 2021-11-18 22:18:53 +01:00
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@ -190,7 +190,7 @@ module I18next::Plurals
return "" if plural_form.none?
# Get the index and suffix for this number
# idx = Todo
idx = SuffixIndex.get_index(plural_form, count)
suffix = rule_numbers[idx]
# Simple plurals are handled differently in all versions (but v4)
@ -209,4 +209,284 @@ module I18next::Plurals
end
end
end
# -----------------------------
# Plural functions
# -----------------------------
module SuffixIndex
def self.get_index(plural_form : PluralForms, count : Int) : UInt8
case plural_form
when .single_gt_one? then return (count > 1) ? 1_u8 : 0_u8
when .single_not_one? then return (count != 1) ? 1_u8 : 0_u8
when .none? then return 0_u8
when .dual_slavic? then return dual_slavic(count)
when .special_arabic? then return special_arabic(count)
when .special_czech_slovak? then return special_czech_slovak(count)
when .special_polish_kashubian? then return special_polish_kashubian(count)
when .special_welsh? then return special_welsh(count)
when .special_irish? then return special_irish(count)
when .special_scottish_gaelic? then return special_scottish_gaelic(count)
when .special_icelandic? then return special_icelandic(count)
when .special_javanese? then return special_javanese(count)
when .special_cornish? then return special_cornish(count)
when .special_lithuanian? then return special_lithuanian(count)
when .special_latvian? then return special_latvian(count)
when .special_macedonian? then return special_macedonian(count)
when .special_mandinka? then return special_mandinka(count)
when .special_maltese? then return special_maltese(count)
when .special_romanian? then return special_romanian(count)
when .special_slovenian? then return special_slovenian(count)
when .special_hebrew? then return special_hebrew(count)
else
# default, if nothing matched above
return 0_u8
end
end
# Plural form of Slavic languages (E.g: Russian)
#
# Corresponds to i18next rule #4
# Rule: (n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2)
#
def self.dual_slavic(count : Int) : UInt8
n_mod_10 = count % 10
n_mod_100 = count % 100
if n_mod_10 == 1 && n_mod_100 != 11
return 0_u8
elsif n_mod_10 >= 2 && n_mod_10 <= 4 && (n_mod_100 < 10 || n_mod_100 >= 20)
return 1_u8
else
return 2_u8
end
end
# Plural form for Arabic language
#
# Corresponds to i18next rule #5
# Rule: (n==0 ? 0 : n==1 ? 1 : n==2 ? 2 : n%100>=3 && n%100<=10 ? 3 : n%100>=11 ? 4 : 5)
#
def self.special_arabic(count : Int) : UInt8
return count.to_u8 if (count == 0 || count == 1 || count == 2)
n_mod_100 = count % 100
return 3_u8 if (n_mod_100 >= 3 && n_mod_100 <= 10)
return 4_u8 if (n_mod_100 >= 11)
return 5_u8
end
# Plural form for Czech and Slovak languages
#
# Corresponds to i18next rule #6
# Rule: ((n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2)
#
def self.special_czech_slovak(count : Int) : UInt8
return 0_u8 if (count == 1)
return 1_u8 if (count >= 2 && count <= 4)
return 2_u8
end
# Plural form for Polish and Kashubian languages
#
# Corresponds to i18next rule #7
# Rule: (n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2)
#
def self.special_polish_kashubian(count : Int) : UInt8
return 0_u8 if (count == 1)
n_mod_10 = count % 10
n_mod_100 = count % 100
if n_mod_10 >= 2 && n_mod_10 <= 4 && (n_mod_100 < 10 || n_mod_100 >= 20)
return 1_u8
else
return 2_u8
end
end
# Plural form for Welsh language
#
# Corresponds to i18next rule #8
# Rule: ((n==1) ? 0 : (n==2) ? 1 : (n != 8 && n != 11) ? 2 : 3)
#
def self.special_welsh(count : Int) : UInt8
return 0_u8 if (count == 1)
return 1_u8 if (count == 2)
return 2_u8 if (count != 8 && count != 11)
return 3_u8
end
# Plural form for Irish language
#
# Corresponds to i18next rule #10
# Rule: (n==1 ? 0 : n==2 ? 1 : n<7 ? 2 : n<11 ? 3 : 4)
#
def self.special_irish(count : Int) : UInt8
return count.to_u8 if (count == 1 || count == 2)
return 2_u8 if (count < 7)
return 3_u8 if (count < 11)
return 4_u8
end
# Plural form for Gaelic language
#
# Corresponds to i18next rule #11
# Rule: ((n==1 || n==11) ? 0 : (n==2 || n==12) ? 1 : (n > 2 && n < 20) ? 2 : 3)
#
def self.special_scottish_gaelic(count : Int) : UInt8
return 0_u8 if (count == 1 || count == 11)
return 1_u8 if (count == 2 || count == 12)
return 2_u8 if (count > 2 && count < 20)
return 3_u8
end
# Plural form for Icelandic language
#
# Corresponds to i18next rule #12
# Rule: (n%10!=1 || n%100==11)
#
def self.special_icelandic(count : Int) : UInt8
if (count % 10) != 1 || (count % 100) == 11
return 1_u8
else
return 0_u8
end
end
# Plural form for Javanese language
#
# Corresponds to i18next rule #13
# Rule: (n !== 0)
#
def self.special_javanese(count : Int) : UInt8
return (count != 0) ? 1_u8 : 0_u8
end
# Plural form for Cornish language
#
# Corresponds to i18next rule #14
# Rule: ((n==1) ? 0 : (n==2) ? 1 : (n == 3) ? 2 : 3)
#
def self.special_cornish(count : Int) : UInt8
return 0_u8 if count == 1
return 1_u8 if count == 2
return 2_u8 if count == 3
return 3_u8
end
# Plural form for Lithuanian language
#
# Corresponds to i18next rule #15
# Rule: (n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 || n%100>=20) ? 1 : 2)
#
def self.special_lithuanian(count : Int) : UInt8
n_mod_10 = count % 10
n_mod_100 = count % 100
if n_mod_10 == 1 && n_mod_100 != 11
return 0_u8
elsif n_mod_10 >= 2 && (n_mod_100 < 10 || n_mod_100 >= 20)
return 1_u8
else
return 2_u8
end
end
# Plural form for Latvian language
#
# Corresponds to i18next rule #16
# Rule: (n%10==1 && n%100!=11 ? 0 : n !== 0 ? 1 : 2)
#
def self.special_latvian(count : Int) : UInt8
if (count % 10) == 1 && (count % 100) != 11
return 0_u8
elsif count != 0
return 1_u8
else
return 2_u8
end
end
# Plural form for Macedonian language
#
# Corresponds to i18next rule #17
# Rule: (n==1 || n%10==1 && n%100!=11 ? 0 : 1)
#
def self.special_macedonian(count : Int) : UInt8
if count == 1 || ((count % 10) == 1 && (count % 100) != 11)
return 0_u8
else
return 1_u8
end
end
# Plural form for Mandinka language
#
# Corresponds to i18next rule #18
# Rule: (n==0 ? 0 : n==1 ? 1 : 2)
#
def self.special_mandinka(count : Int) : UInt8
return (count == 0 || count == 1) ? count.to_u8 : 2_u8
end
# Plural form for Maltese language
#
# Corresponds to i18next rule #19
# Rule: (n==1 ? 0 : n==0 || ( n%100>1 && n%100<11) ? 1 : (n%100>10 && n%100<20 ) ? 2 : 3)
#
def self.special_maltese(count : Int) : UInt8
return 0_u8 if count == 1
return 1_u8 if count == 0
n_mod_100 = count % 100
return 1_u8 if (n_mod_100 > 1 && n_mod_100 < 11)
return 2_u8 if (n_mod_100 > 10 && n_mod_100 < 20)
return 3_u8
end
# Plural form for Romanian language
#
# Corresponds to i18next rule #20
# Rule: (n==1 ? 0 : (n==0 || (n%100 > 0 && n%100 < 20)) ? 1 : 2)
#
def self.special_romanian(count : Int) : UInt8
return 0_u8 if count == 1
return 1_u8 if count == 0
n_mod_100 = count % 100
return 1_u8 if (n_mod_100 > 0 && n_mod_100 < 20)
return 2_u8
end
# Plural form for Slovenian language
#
# Corresponds to i18next rule #21
# Rule: (n%100==1 ? 1 : n%100==2 ? 2 : n%100==3 || n%100==4 ? 3 : 0)
#
def self.special_slovenian(count : Int) : UInt8
n_mod_100 = count % 100
return 1_u8 if (n_mod_100 == 1)
return 2_u8 if (n_mod_100 == 2)
return 3_u8 if (n_mod_100 == 3 || n_mod_100 == 4)
return 0_u8
end
# Plural form for Hebrew language
#
# Corresponds to i18next rule #22
# Rule: (n==1 ? 0 : n==2 ? 1 : (n<0 || n>10) && n%10==0 ? 2 : 3)
#
def self.special_hebrew(count : Int) : UInt8
return 0_u8 if (count == 1)
return 1_u8 if (count == 2)
if (count < 0 || count > 10) && (count % 10) == 0
return 2_u8
else
return 3_u8
end
end
end
end