Update charted to 0.4.8 and roll

packages/intl/lib/src/plural_rules.dart

+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// Provides locale-specific plural rules. Based on pluralrules.js from Closure.
+///
+/// Each function does the calculation for one or more locales. These are done in terms of
+/// various values used by the CLDR syntax and defined by UTS #35
+/// http://unicode.org/reports/tr35/tr35-numbers.html#Plural_rules_syntax
+///
+/// * n - absolute value of the source number (integer and decimals).
+/// * i - integer digits of n.
+/// * v - number of visible fraction digits in n, with trailing zeros.
+/// * w - number of visible fraction digits in n, without trailing zeros.
+/// * f - visible fractional digits in n, with trailing zeros.
+/// * t - visible fractional digits in n, without trailing zeros.
+library plural_rules;
+
+typedef PluralCase PluralRule();
+
+/// The possible cases used in a plural rule.
+enum PluralCase { ZERO, ONE, TWO, FEW, MANY, OTHER }
+
+/// The default rule in case we don't have anything more specific for a locale.
+PluralCase _default_rule() => OTHER;
+
+/// This must be called before evaluating a new rule, because we're using
+/// library-global state to both keep the rules terse and minimize space.
+startRuleEvaluation(int howMany) {
+  _n = howMany;
+}
+
+/// The number whose [PluralCase] we are trying to find.
+///
+// This is library-global state, along with the other variables. This allows us
+// to avoid calculating parameters that the functions don't need and also
+// not introduce a subclass per locale or have instance tear-offs which
+// we can't cache. This is fine as long as these methods aren't async, which
+// they should never be.
+int _n;
+
+/// The integer part of [_n] - since we only support integers, it's the same as
+/// [_n].
+int get _i => _n;
+int opt_precision; // Not currently used.
+
+/// Number of visible fraction digits. Always zero since we only support int.
+int get _v => 0;
+
+/// Number of visible fraction digits without trailing zeros. Always zero
+/// since we only support int.
+//int get _w => 0;
+
+/// The visible fraction digits in n, with trailing zeros. Always zero since
+/// we only support int.
+int get _f => 0;
+
+/// The visible fraction digits in n, without trailing zeros. Always zero since
+/// we only support int.
+int get _t => 0;
+
+PluralCase get ZERO => PluralCase.ZERO;
+PluralCase get ONE => PluralCase.ONE;
+PluralCase get TWO => PluralCase.TWO;
+PluralCase get FEW => PluralCase.FEW;
+PluralCase get MANY => PluralCase.MANY;
+PluralCase get OTHER => PluralCase.OTHER;
+
+PluralCase _fil_rule() {
+  if (_v == 0 && (_i == 1 || _i == 2 || _i == 3) ||
+      _v == 0 && _i % 10 != 4 && _i % 10 != 6 && _i % 10 != 9 ||
+      _v != 0 && _f % 10 != 4 && _f % 10 != 6 && _f % 10 != 9) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _pt_PT_rule() {
+  if (_n == 1 && _v == 0) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _br_rule() {
+  if (_n % 10 == 1 && _n % 100 != 11 && _n % 100 != 71 && _n % 100 != 91) {
+    return ONE;
+  }
+  if (_n % 10 == 2 && _n % 100 != 12 && _n % 100 != 72 && _n % 100 != 92) {
+    return TWO;
+  }
+  if ((_n % 10 >= 3 && _n % 10 <= 4 || _n % 10 == 9) &&
+      (_n % 100 < 10 || _n % 100 > 19) &&
+      (_n % 100 < 70 || _n % 100 > 79) &&
+      (_n % 100 < 90 || _n % 100 > 99)) {
+    return FEW;
+  }
+  if (_n != 0 && _n % 1000000 == 0) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _sr_rule() {
+  if (_v == 0 && _i % 10 == 1 && _i % 100 != 11 ||
+      _f % 10 == 1 && _f % 100 != 11) {
+    return ONE;
+  }
+  if (_v == 0 &&
+          _i % 10 >= 2 &&
+          _i % 10 <= 4 &&
+          (_i % 100 < 12 || _i % 100 > 14) ||
+      _f % 10 >= 2 && _f % 10 <= 4 && (_f % 100 < 12 || _f % 100 > 14)) {
+    return FEW;
+  }
+  return OTHER;
+}
+
+PluralCase _ro_rule() {
+  if (_i == 1 && _v == 0) {
+    return ONE;
+  }
+  if (_v != 0 || _n == 0 || _n != 1 && _n % 100 >= 1 && _n % 100 <= 19) {
+    return FEW;
+  }
+  return OTHER;
+}
+
+PluralCase _hi_rule() {
+  if (_i == 0 || _n == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _fr_rule() {
+  if (_i == 0 || _i == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _cs_rule() {
+  if (_i == 1 && _v == 0) {
+    return ONE;
+  }
+  if (_i >= 2 && _i <= 4 && _v == 0) {
+    return FEW;
+  }
+  if (_v != 0) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _pl_rule() {
+  if (_i == 1 && _v == 0) {
+    return ONE;
+  }
+  if (_v == 0 &&
+      _i % 10 >= 2 &&
+      _i % 10 <= 4 &&
+      (_i % 100 < 12 || _i % 100 > 14)) {
+    return FEW;
+  }
+  if (_v == 0 && _i != 1 && _i % 10 >= 0 && _i % 10 <= 1 ||
+      _v == 0 && _i % 10 >= 5 && _i % 10 <= 9 ||
+      _v == 0 && _i % 100 >= 12 && _i % 100 <= 14) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _lv_rule() {
+  if (_n % 10 == 0 ||
+      _n % 100 >= 11 && _n % 100 <= 19 ||
+      _v == 2 && _f % 100 >= 11 && _f % 100 <= 19) {
+    return ZERO;
+  }
+  if (_n % 10 == 1 && _n % 100 != 11 ||
+      _v == 2 && _f % 10 == 1 && _f % 100 != 11 ||
+      _v != 2 && _f % 10 == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _he_rule() {
+  if (_i == 1 && _v == 0) {
+    return ONE;
+  }
+  if (_i == 2 && _v == 0) {
+    return TWO;
+  }
+  if (_v == 0 && (_n < 0 || _n > 10) && _n % 10 == 0) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _mt_rule() {
+  if (_n == 1) {
+    return ONE;
+  }
+  if (_n == 0 || _n % 100 >= 2 && _n % 100 <= 10) {
+    return FEW;
+  }
+  if (_n % 100 >= 11 && _n % 100 <= 19) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _si_rule() {
+  if ((_n == 0 || _n == 1) || _i == 0 && _f == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _cy_rule() {
+  if (_n == 0) {
+    return ZERO;
+  }
+  if (_n == 1) {
+    return ONE;
+  }
+  if (_n == 2) {
+    return TWO;
+  }
+  if (_n == 3) {
+    return FEW;
+  }
+  if (_n == 6) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _da_rule() {
+  if (_n == 1 || _t != 0 && (_i == 0 || _i == 1)) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _ru_rule() {
+  if (_v == 0 && _i % 10 == 1 && _i % 100 != 11) {
+    return ONE;
+  }
+  if (_v == 0 &&
+      _i % 10 >= 2 &&
+      _i % 10 <= 4 &&
+      (_i % 100 < 12 || _i % 100 > 14)) {
+    return FEW;
+  }
+  if (_v == 0 && _i % 10 == 0 ||
+      _v == 0 && _i % 10 >= 5 && _i % 10 <= 9 ||
+      _v == 0 && _i % 100 >= 11 && _i % 100 <= 14) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _be_rule() {
+  if (_n % 10 == 1 && _n % 100 != 11) {
+    return ONE;
+  }
+  if (_n % 10 >= 2 && _n % 10 <= 4 && (_n % 100 < 12 || _n % 100 > 14)) {
+    return FEW;
+  }
+  if (_n % 10 == 0 ||
+      _n % 10 >= 5 && _n % 10 <= 9 ||
+      _n % 100 >= 11 && _n % 100 <= 14) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _mk_rule() {
+  if (_v == 0 && _i % 10 == 1 || _f % 10 == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _ga_rule() {
+  if (_n == 1) {
+    return ONE;
+  }
+  if (_n == 2) {
+    return TWO;
+  }
+  if (_n >= 3 && _n <= 6) {
+    return FEW;
+  }
+  if (_n >= 7 && _n <= 10) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _pt_rule() {
+  if (_n >= 0 && _n <= 2 && _n != 2) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _es_rule() {
+  if (_n == 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _is_rule() {
+  if (_t == 0 && _i % 10 == 1 && _i % 100 != 11 || _t != 0) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _ar_rule() {
+  if (_n == 0) {
+    return ZERO;
+  }
+  if (_n == 1) {
+    return ONE;
+  }
+  if (_n == 2) {
+    return TWO;
+  }
+  if (_n % 100 >= 3 && _n % 100 <= 10) {
+    return FEW;
+  }
+  if (_n % 100 >= 11 && _n % 100 <= 99) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _sl_rule() {
+  if (_v == 0 && _i % 100 == 1) {
+    return ONE;
+  }
+  if (_v == 0 && _i % 100 == 2) {
+    return TWO;
+  }
+  if (_v == 0 && _i % 100 >= 3 && _i % 100 <= 4 || _v != 0) {
+    return FEW;
+  }
+  return OTHER;
+}
+
+PluralCase _lt_rule() {
+  if (_n % 10 == 1 && (_n % 100 < 11 || _n % 100 > 19)) {
+    return ONE;
+  }
+  if (_n % 10 >= 2 && _n % 10 <= 9 && (_n % 100 < 11 || _n % 100 > 19)) {
+    return FEW;
+  }
+  if (_f != 0) {
+    return MANY;
+  }
+  return OTHER;
+}
+
+PluralCase _en_rule() {
+  if (_i == 1 && _v == 0) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+PluralCase _ak_rule() {
+  if (_n >= 0 && _n <= 1) {
+    return ONE;
+  }
+  return OTHER;
+}
+
+/// Selected Plural rules by locale.
+final Map pluralRules = {
+  'af': _es_rule,
+  'am': _hi_rule,
+  'ar': _ar_rule,
+  'az': _es_rule,
+  'be': _be_rule,
+  'bg': _es_rule,
+  'bn': _hi_rule,
+  'br': _br_rule,
+  'bs': _sr_rule,
+  'ca': _en_rule,
+  'chr': _es_rule,
+  'cs': _cs_rule,
+  'cy': _cy_rule,
+  'da': _da_rule,
+  'de': _en_rule,
+  'de_AT': _en_rule,
+  'de_CH': _en_rule,
+  'el': _es_rule,
+  'en': _en_rule,
+  'en_AU': _en_rule,
+  'en_CA': _en_rule,
+  'en_GB': _en_rule,
+  'en_IE': _en_rule,
+  'en_IN': _en_rule,
+  'en_SG': _en_rule,
+  'en_US': _en_rule,
+  'en_ZA': _en_rule,
+  'es': _es_rule,
+  'es_419': _es_rule,
+  'es_ES': _es_rule,
+  'es_MX': _es_rule,
+  'es_US': _es_rule,
+  'et': _en_rule,
+  'eu': _es_rule,
+  'fa': _hi_rule,
+  'fi': _en_rule,
+  'fil': _fil_rule,
+  'fr': _fr_rule,
+  'fr_CA': _fr_rule,
+  'ga': _ga_rule,
+  'gl': _en_rule,
+  'gsw': _es_rule,
+  'gu': _hi_rule,
+  'haw': _es_rule,
+  'he': _he_rule,
+  'hi': _hi_rule,
+  'hr': _sr_rule,
+  'hu': _es_rule,
+  'hy': _fr_rule,
+  'id': _default_rule,
+  'in': _default_rule,
+  'is': _is_rule,
+  'it': _en_rule,
+  'iw': _he_rule,
+  'ja': _default_rule,
+  'ka': _es_rule,
+  'kk': _es_rule,
+  'km': _default_rule,
+  'kn': _hi_rule,
+  'ko': _default_rule,
+  'ky': _es_rule,
+  'ln': _ak_rule,
+  'lo': _default_rule,
+  'lt': _lt_rule,
+  'lv': _lv_rule,
+  'mk': _mk_rule,
+  'ml': _es_rule,
+  'mn': _es_rule,
+  'mo': _ro_rule,
+  'mr': _hi_rule,
+  'ms': _default_rule,
+  'mt': _mt_rule,
+  'my': _default_rule,
+  'nb': _es_rule,
+  'ne': _es_rule,
+  'nl': _en_rule,
+  'no': _es_rule,
+  'no_NO': _es_rule,
+  'or': _es_rule,
+  'pa': _ak_rule,
+  'pl': _pl_rule,
+  'pt': _pt_rule,
+  'pt_BR': _pt_rule,
+  'pt_PT': _pt_PT_rule,
+  'ro': _ro_rule,
+  'ru': _ru_rule,
+  'sh': _sr_rule,
+  'si': _si_rule,
+  'sk': _cs_rule,
+  'sl': _sl_rule,
+  'sq': _es_rule,
+  'sr': _sr_rule,
+  'sr_Latn': _sr_rule,
+  'sv': _en_rule,
+  'sw': _en_rule,
+  'ta': _es_rule,
+  'te': _es_rule,
+  'th': _default_rule,
+  'tl': _fil_rule,
+  'tr': _es_rule,
+  'uk': _ru_rule,
+  'ur': _en_rule,
+  'uz': _es_rule,
+  'vi': _default_rule,
+  'zh': _default_rule,
+  'zh_CN': _default_rule,
+  'zh_HK': _default_rule,
+  'zh_TW': _default_rule,
+  'zu': _hi_rule,
+  'default': _default_rule
+};
+
+/// Do we have plural rules specific to [locale]
+bool localeHasPluralRules(String locale) => pluralRules.containsKey(locale);