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i18n: make multiple fixes to i18next plurals
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Samantaz Fox
parent
2a156e7313
commit
4752e16ad2
@ -5,7 +5,7 @@ module I18next::Plurals
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# I18next plural forms definition
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# -----------------------------------
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private enum PluralForms
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enum PluralForms
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# One singular, one plural forms
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Single_gt_one = 1 # E.g: French
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Single_not_one = 2 # E.g: English
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@ -34,6 +34,7 @@ module I18next::Plurals
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Special_Romanian = 20
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Special_Slovenian = 21
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Special_Hebrew = 22
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Special_Odia = 23
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end
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private PLURAL_SETS = {
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@ -75,13 +76,15 @@ module I18next::Plurals
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"mk" => PluralForms::Special_Macedonian,
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"mnk" => PluralForms::Special_Mandinka,
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"mt" => PluralForms::Special_Maltese,
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"or" => PluralForms::Special_Odia,
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"pl" => PluralForms::Special_Polish_Kashubian,
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"ro" => PluralForms::Special_Romanian,
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"sk" => PluralForms::Special_Czech_Slovak,
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"sl" => PluralForms::Special_Slovenian,
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}
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# The array indices matches the PluralForms enum above
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# These are the v1 and v2 compatible suffixes.
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# The array indices matches the PluralForms enum above.
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private NUMBERS = [
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[1, 2], # 1
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[1, 2], # 2
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@ -105,67 +108,58 @@ module I18next::Plurals
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[1, 2, 20], # 20
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[5, 1, 2, 3], # 21
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[1, 2, 20, 21], # 22
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[2, 1], # 23 (Odia)
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]
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# "or" ()
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private NUMBERS_OR = [2, 1]
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# -----------------------------------
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# I18next plural resolver class
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# -----------------------------------
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RESOLVER = Resolver.new
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class Resolver
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@@forms : Hash(String, PluralForms) = init_rules()
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@@version : UInt8 = 3
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private property forms = {} of String => PluralForms
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property version : UInt8 = 3
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# Options
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property simplify_plural_suffix : Bool = true
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# Suffixes
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SUFFIXES_V1 = {
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"",
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"_plural_1",
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"_plural_2",
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"_plural_3",
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"_plural_11",
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"_plural_100",
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}
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SUFFIXES_V2 = {"_0", "_1", "_2", "_3", "_11", "_100"}
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SUFFIXES_V3 = {"_0", "_1", "_2", "_3", "_4", "_5"}
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def initialize(version : UInt8 = 3)
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def initialize(version : Int = 3)
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# Sanity checks
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# V4 isn't supported, as it requires a full CLDR database.
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if version > 4 || version == 0
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raise "Invalid i18next version: v#{version}."
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elsif version == 4
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# Logger.error("Unsupported i18next version: v4. Falling back to v3")
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@@version = 3
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@version = 3_u8
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else
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@@version = version
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end
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@version = version.to_u8
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end
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def self.init_rules
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self.init_rules
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end
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def init_rules # : Hash(String, PluralForms)
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# Init
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# forms = {} of String => PluralForms
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# Look into sets
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PLURAL_SETS.each do |form, langs|
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langs.each { |lang| @@forms[lang] = form }
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langs.each { |lang| self.forms[lang] = form }
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end
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# Add plurals from the "singles" set
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@@forms.merge!(PLURAL_SINGLES)
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self.forms.merge!(PLURAL_SINGLES)
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end
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def get_plural_form(locale : String) : PluralForms
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# Extract the ISO 639-1 or 639-2 code from an RFC 5646
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# language code, except for pt-BR which needs to be kept as-is.
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if locale.starts_with?("pt-BR")
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locale = "pt-BR"
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else
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# Extract the ISO 639-1 or 639-2 code from an RFC 5646 language code,
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# except for pt-BR and pt-PT which needs to be kept as-is.
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if !locale.matches?(/^pt-(BR|PT)$/)
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locale = locale.split('-')[0]
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end
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return @@forms[locale] if @@forms[locale]?
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return self.forms[locale] if self.forms[locale]?
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# If nothing was found, then use the most common form, i.e
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# one singular and one plural, as in english. Not perfect,
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@ -181,32 +175,48 @@ module I18next::Plurals
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return get_suffix_retrocompat(locale, count.abs)
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end
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def get_suffix_retrocompat(locale : String, count : Int) : String
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# Emulate the `rule.numbers.size == 2 && rule.numbers[0] == 1` check
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# from original i18next code
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private def is_simple_plural(form : PluralForms) : Bool
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case form
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when .single_gt_one? then return true
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when .single_not_one? then return true
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when .special_icelandic? then return true
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when .special_macedonian? then return true
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else
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return false
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end
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end
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private def get_suffix_retrocompat(locale : String, count : Int) : String
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# Get plural form
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plural_form = get_plural_form(locale)
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rule_numbers = (locale == "or") ? NUMBERS_OR : NUMBERS[plural_form.to_i]
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# Languages with no plural have no suffix
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return "" if plural_form.none?
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# Languages with no plural have the "_0" suffix
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return "_0" if plural_form.none?
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# Get the index and suffix for this number
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idx = SuffixIndex.get_index(plural_form, count)
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suffix = rule_numbers[idx]
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# Simple plurals are handled differently in all versions (but v4)
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if @simplify_plural_suffix && rule_numbers.size == 2 && rule_numbers[0] == 1
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return "_plural" if (suffix == 2)
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return "" if (suffix == 1)
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if @simplify_plural_suffix && is_simple_plural(plural_form)
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return (idx == 1) ? "_plural" : ""
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end
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# More complex plurals
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# TODO: support `options.prepend` for v2 and v3
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# TODO: support v1 and v2
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# TODO: support `options.prepend` (v2 and v3)
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# this.options.prepend && suffix.toString() ? this.options.prepend + suffix.toString() : suffix.toString()
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case @version
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when 1 then return SUFFIXES_V1[idx]
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when 2 then return SUFFIXES_V2[idx]
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else return SUFFIXES_V3[idx]
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end
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#
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# case @version
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# when 1
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# suffix = SUFFIXES_V1_V2[plural_form.to_i][idx]
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# return (suffix == 1) ? "" : return "_plural_#{suffix}"
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# when 2
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# return "_#{suffix}"
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# else # v3
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return "_#{idx}"
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# end
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end
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end
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@ -238,6 +248,7 @@ module I18next::Plurals
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when .special_romanian? then return special_romanian(count)
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when .special_slovenian? then return special_slovenian(count)
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when .special_hebrew? then return special_hebrew(count)
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when .special_odia? then return special_odia(count)
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else
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# default, if nothing matched above
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return 0_u8
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@ -324,7 +335,8 @@ module I18next::Plurals
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# Rule: (n==1 ? 0 : n==2 ? 1 : n<7 ? 2 : n<11 ? 3 : 4)
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#
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def self.special_irish(count : Int) : UInt8
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return count.to_u8 if (count == 1 || count == 2)
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return 0_u8 if (count == 1)
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return 1_u8 if (count == 2)
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return 2_u8 if (count < 7)
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return 3_u8 if (count < 11)
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return 4_u8
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@ -488,5 +500,15 @@ module I18next::Plurals
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return 3_u8
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end
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end
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# Plural form for Odia ("or") language
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#
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# This one is a bit special. It should use rule #2 (like english)
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# but the "numbers" (suffixes?) it has are inverted, so we'll make a
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# special rule for it.
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#
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def self.special_odia(count : Int) : UInt8
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return (count == 1) ? 0_u8 : 1_u8
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end
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end
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end
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