1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/base/l10n/l10n_util_plurals.h" 6 7 #include "base/memory/scoped_ptr.h" 8 #include "ui/base/l10n/l10n_util.h" 9 10 namespace l10n_util { 11 12 scoped_ptr<icu::PluralRules> BuildPluralRules() { 13 UErrorCode err = U_ZERO_ERROR; 14 scoped_ptr<icu::PluralRules> rules( 15 icu::PluralRules::forLocale(icu::Locale::getDefault(), err)); 16 if (U_FAILURE(err)) { 17 err = U_ZERO_ERROR; 18 icu::UnicodeString fallback_rules("one: n is 1", -1, US_INV); 19 rules.reset(icu::PluralRules::createRules(fallback_rules, err)); 20 DCHECK(U_SUCCESS(err)); 21 } 22 return rules.Pass(); 23 } 24 25 scoped_ptr<icu::PluralFormat> BuildPluralFormat( 26 const std::vector<int>& message_ids) { 27 const icu::UnicodeString kKeywords[] = { 28 UNICODE_STRING_SIMPLE("other"), 29 UNICODE_STRING_SIMPLE("one"), 30 UNICODE_STRING_SIMPLE("zero"), 31 UNICODE_STRING_SIMPLE("two"), 32 UNICODE_STRING_SIMPLE("few"), 33 UNICODE_STRING_SIMPLE("many"), 34 }; 35 DCHECK_EQ(message_ids.size(), arraysize(kKeywords)); 36 UErrorCode err = U_ZERO_ERROR; 37 scoped_ptr<icu::PluralRules> rules(BuildPluralRules()); 38 39 icu::UnicodeString pattern; 40 for (size_t i = 0; i < arraysize(kKeywords); ++i) { 41 int msg_id = message_ids[i]; 42 std::string sub_pattern = GetStringUTF8(msg_id); 43 // NA means this keyword is not used in the current locale. 44 // Even if a translator translated for this keyword, we do not 45 // use it unless it's 'other' (i=0) or it's defined in the rules 46 // for the current locale. Special-casing of 'other' will be removed 47 // once ICU's isKeyword is fixed to return true for isKeyword('other'). 48 if (sub_pattern.compare("NA") != 0 && 49 (i == 0 || rules->isKeyword(kKeywords[i]))) { 50 pattern += kKeywords[i]; 51 pattern += UNICODE_STRING_SIMPLE("{"); 52 pattern += icu::UnicodeString(sub_pattern.c_str(), "UTF-8"); 53 pattern += UNICODE_STRING_SIMPLE("}"); 54 } 55 } 56 scoped_ptr<icu::PluralFormat> format = scoped_ptr<icu::PluralFormat>( 57 new icu::PluralFormat(*rules, pattern, err)); 58 if (!U_SUCCESS(err)) { 59 return scoped_ptr<icu::PluralFormat>(); 60 } 61 return format.Pass(); 62 } 63 64 } // namespace l10n_util 65
