diff options
Diffstat (limited to 'chromium/v8/src/extensions/i18n/number-format.cc')
| -rw-r--r-- | chromium/v8/src/extensions/i18n/number-format.cc | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/chromium/v8/src/extensions/i18n/number-format.cc b/chromium/v8/src/extensions/i18n/number-format.cc new file mode 100644 index 00000000000..136471561c4 --- /dev/null +++ b/chromium/v8/src/extensions/i18n/number-format.cc @@ -0,0 +1,418 @@ +// Copyright 2013 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// limitations under the License. + +#include "number-format.h" + +#include <string.h> + +#include "i18n-utils.h" +#include "unicode/curramt.h" +#include "unicode/dcfmtsym.h" +#include "unicode/decimfmt.h" +#include "unicode/locid.h" +#include "unicode/numfmt.h" +#include "unicode/numsys.h" +#include "unicode/uchar.h" +#include "unicode/ucurr.h" +#include "unicode/unum.h" +#include "unicode/uversion.h" + +namespace v8_i18n { + +static icu::DecimalFormat* InitializeNumberFormat(v8::Handle<v8::String>, + v8::Handle<v8::Object>, + v8::Handle<v8::Object>); +static icu::DecimalFormat* CreateICUNumberFormat(const icu::Locale&, + v8::Handle<v8::Object>); +static void SetResolvedSettings(const icu::Locale&, + icu::DecimalFormat*, + v8::Handle<v8::Object>); + +icu::DecimalFormat* NumberFormat::UnpackNumberFormat( + v8::Handle<v8::Object> obj) { + v8::HandleScope handle_scope; + + // v8::ObjectTemplate doesn't have HasInstance method so we can't check + // if obj is an instance of NumberFormat class. We'll check for a property + // that has to be in the object. The same applies to other services, like + // Collator and DateTimeFormat. + if (obj->HasOwnProperty(v8::String::New("numberFormat"))) { + return static_cast<icu::DecimalFormat*>( + obj->GetAlignedPointerFromInternalField(0)); + } + + return NULL; +} + +void NumberFormat::DeleteNumberFormat(v8::Isolate* isolate, + v8::Persistent<v8::Object>* object, + void* param) { + // First delete the hidden C++ object. + // Unpacking should never return NULL here. That would only happen if + // this method is used as the weak callback for persistent handles not + // pointing to a date time formatter. + v8::HandleScope handle_scope(isolate); + v8::Local<v8::Object> handle = v8::Local<v8::Object>::New(isolate, *object); + delete UnpackNumberFormat(handle); + + // Then dispose of the persistent handle to JS object. + object->Dispose(isolate); +} + +void NumberFormat::JSInternalFormat( + const v8::FunctionCallbackInfo<v8::Value>& args) { + if (args.Length() != 2 || !args[0]->IsObject() || !args[1]->IsNumber()) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("Formatter and numeric value have to be specified."))); + return; + } + + icu::DecimalFormat* number_format = UnpackNumberFormat(args[0]->ToObject()); + if (!number_format) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("NumberFormat method called on an object " + "that is not a NumberFormat."))); + return; + } + + // ICU will handle actual NaN value properly and return NaN string. + icu::UnicodeString result; + number_format->format(args[1]->NumberValue(), result); + + args.GetReturnValue().Set(v8::String::New( + reinterpret_cast<const uint16_t*>(result.getBuffer()), result.length())); +} + +void NumberFormat::JSInternalParse( + const v8::FunctionCallbackInfo<v8::Value>& args) { + if (args.Length() != 2 || !args[0]->IsObject() || !args[1]->IsString()) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("Formatter and string have to be specified."))); + return; + } + + icu::DecimalFormat* number_format = UnpackNumberFormat(args[0]->ToObject()); + if (!number_format) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("NumberFormat method called on an object " + "that is not a NumberFormat."))); + return; + } + + // ICU will handle actual NaN value properly and return NaN string. + icu::UnicodeString string_number; + if (!Utils::V8StringToUnicodeString(args[1]->ToString(), &string_number)) { + string_number = ""; + } + + UErrorCode status = U_ZERO_ERROR; + icu::Formattable result; + // ICU 4.6 doesn't support parseCurrency call. We need to wait for ICU49 + // to be part of Chrome. + // TODO(cira): Include currency parsing code using parseCurrency call. + // We need to check if the formatter parses all currencies or only the + // one it was constructed with (it will impact the API - how to return ISO + // code and the value). + number_format->parse(string_number, result, status); + if (U_FAILURE(status)) { + return; + } + + switch (result.getType()) { + case icu::Formattable::kDouble: + args.GetReturnValue().Set(result.getDouble()); + return; + case icu::Formattable::kLong: + args.GetReturnValue().Set(result.getLong()); + return; + case icu::Formattable::kInt64: + args.GetReturnValue().Set(static_cast<double>(result.getInt64())); + return; + default: + return; + } +} + +void NumberFormat::JSCreateNumberFormat( + const v8::FunctionCallbackInfo<v8::Value>& args) { + if (args.Length() != 3 || + !args[0]->IsString() || + !args[1]->IsObject() || + !args[2]->IsObject()) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("Internal error, wrong parameters."))); + return; + } + + v8::Isolate* isolate = args.GetIsolate(); + v8::Local<v8::ObjectTemplate> number_format_template = + Utils::GetTemplate(isolate); + + // Create an empty object wrapper. + v8::Local<v8::Object> local_object = number_format_template->NewInstance(); + // But the handle shouldn't be empty. + // That can happen if there was a stack overflow when creating the object. + if (local_object.IsEmpty()) { + args.GetReturnValue().Set(local_object); + return; + } + + // Set number formatter as internal field of the resulting JS object. + icu::DecimalFormat* number_format = InitializeNumberFormat( + args[0]->ToString(), args[1]->ToObject(), args[2]->ToObject()); + + if (!number_format) { + v8::ThrowException(v8::Exception::Error(v8::String::New( + "Internal error. Couldn't create ICU number formatter."))); + return; + } else { + local_object->SetAlignedPointerInInternalField(0, number_format); + + v8::TryCatch try_catch; + local_object->Set(v8::String::New("numberFormat"), + v8::String::New("valid")); + if (try_catch.HasCaught()) { + v8::ThrowException(v8::Exception::Error( + v8::String::New("Internal error, couldn't set property."))); + return; + } + } + + v8::Persistent<v8::Object> wrapper(isolate, local_object); + // Make object handle weak so we can delete iterator once GC kicks in. + wrapper.MakeWeak<void>(NULL, &DeleteNumberFormat); + args.GetReturnValue().Set(wrapper); + wrapper.ClearAndLeak(); +} + +static icu::DecimalFormat* InitializeNumberFormat( + v8::Handle<v8::String> locale, + v8::Handle<v8::Object> options, + v8::Handle<v8::Object> resolved) { + // Convert BCP47 into ICU locale format. + UErrorCode status = U_ZERO_ERROR; + icu::Locale icu_locale; + char icu_result[ULOC_FULLNAME_CAPACITY]; + int icu_length = 0; + v8::String::AsciiValue bcp47_locale(locale); + if (bcp47_locale.length() != 0) { + uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY, + &icu_length, &status); + if (U_FAILURE(status) || icu_length == 0) { + return NULL; + } + icu_locale = icu::Locale(icu_result); + } + + icu::DecimalFormat* number_format = + CreateICUNumberFormat(icu_locale, options); + if (!number_format) { + // Remove extensions and try again. + icu::Locale no_extension_locale(icu_locale.getBaseName()); + number_format = CreateICUNumberFormat(no_extension_locale, options); + + // Set resolved settings (pattern, numbering system). + SetResolvedSettings(no_extension_locale, number_format, resolved); + } else { + SetResolvedSettings(icu_locale, number_format, resolved); + } + + return number_format; +} + +static icu::DecimalFormat* CreateICUNumberFormat( + const icu::Locale& icu_locale, v8::Handle<v8::Object> options) { + // Make formatter from options. Numbering system is added + // to the locale as Unicode extension (if it was specified at all). + UErrorCode status = U_ZERO_ERROR; + icu::DecimalFormat* number_format = NULL; + icu::UnicodeString style; + icu::UnicodeString currency; + if (Utils::ExtractStringSetting(options, "style", &style)) { + if (style == UNICODE_STRING_SIMPLE("currency")) { + Utils::ExtractStringSetting(options, "currency", ¤cy); + + icu::UnicodeString display; + Utils::ExtractStringSetting(options, "currencyDisplay", &display); +#if (U_ICU_VERSION_MAJOR_NUM == 4) && (U_ICU_VERSION_MINOR_NUM <= 6) + icu::NumberFormat::EStyles style; + if (display == UNICODE_STRING_SIMPLE("code")) { + style = icu::NumberFormat::kIsoCurrencyStyle; + } else if (display == UNICODE_STRING_SIMPLE("name")) { + style = icu::NumberFormat::kPluralCurrencyStyle; + } else { + style = icu::NumberFormat::kCurrencyStyle; + } +#else // ICU version is 4.8 or above (we ignore versions below 4.0). + UNumberFormatStyle style; + if (display == UNICODE_STRING_SIMPLE("code")) { + style = UNUM_CURRENCY_ISO; + } else if (display == UNICODE_STRING_SIMPLE("name")) { + style = UNUM_CURRENCY_PLURAL; + } else { + style = UNUM_CURRENCY; + } +#endif + + number_format = static_cast<icu::DecimalFormat*>( + icu::NumberFormat::createInstance(icu_locale, style, status)); + } else if (style == UNICODE_STRING_SIMPLE("percent")) { + number_format = static_cast<icu::DecimalFormat*>( + icu::NumberFormat::createPercentInstance(icu_locale, status)); + if (U_FAILURE(status)) { + delete number_format; + return NULL; + } + // Make sure 1.1% doesn't go into 2%. + number_format->setMinimumFractionDigits(1); + } else { + // Make a decimal instance by default. + number_format = static_cast<icu::DecimalFormat*>( + icu::NumberFormat::createInstance(icu_locale, status)); + } + } + + if (U_FAILURE(status)) { + delete number_format; + return NULL; + } + + // Set all options. + if (!currency.isEmpty()) { + number_format->setCurrency(currency.getBuffer(), status); + } + + int32_t digits; + if (Utils::ExtractIntegerSetting( + options, "minimumIntegerDigits", &digits)) { + number_format->setMinimumIntegerDigits(digits); + } + + if (Utils::ExtractIntegerSetting( + options, "minimumFractionDigits", &digits)) { + number_format->setMinimumFractionDigits(digits); + } + + if (Utils::ExtractIntegerSetting( + options, "maximumFractionDigits", &digits)) { + number_format->setMaximumFractionDigits(digits); + } + + bool significant_digits_used = false; + if (Utils::ExtractIntegerSetting( + options, "minimumSignificantDigits", &digits)) { + number_format->setMinimumSignificantDigits(digits); + significant_digits_used = true; + } + + if (Utils::ExtractIntegerSetting( + options, "maximumSignificantDigits", &digits)) { + number_format->setMaximumSignificantDigits(digits); + significant_digits_used = true; + } + + number_format->setSignificantDigitsUsed(significant_digits_used); + + bool grouping; + if (Utils::ExtractBooleanSetting(options, "useGrouping", &grouping)) { + number_format->setGroupingUsed(grouping); + } + + // Set rounding mode. + number_format->setRoundingMode(icu::DecimalFormat::kRoundHalfUp); + + return number_format; +} + +static void SetResolvedSettings(const icu::Locale& icu_locale, + icu::DecimalFormat* number_format, + v8::Handle<v8::Object> resolved) { + icu::UnicodeString pattern; + number_format->toPattern(pattern); + resolved->Set(v8::String::New("pattern"), + v8::String::New(reinterpret_cast<const uint16_t*>( + pattern.getBuffer()), pattern.length())); + + // Set resolved currency code in options.currency if not empty. + icu::UnicodeString currency(number_format->getCurrency()); + if (!currency.isEmpty()) { + resolved->Set(v8::String::New("currency"), + v8::String::New(reinterpret_cast<const uint16_t*>( + currency.getBuffer()), currency.length())); + } + + // Ugly hack. ICU doesn't expose numbering system in any way, so we have + // to assume that for given locale NumberingSystem constructor produces the + // same digits as NumberFormat would. + UErrorCode status = U_ZERO_ERROR; + icu::NumberingSystem* numbering_system = + icu::NumberingSystem::createInstance(icu_locale, status); + if (U_SUCCESS(status)) { + const char* ns = numbering_system->getName(); + resolved->Set(v8::String::New("numberingSystem"), v8::String::New(ns)); + } else { + resolved->Set(v8::String::New("numberingSystem"), v8::Undefined()); + } + delete numbering_system; + + resolved->Set(v8::String::New("useGrouping"), + v8::Boolean::New(number_format->isGroupingUsed())); + + resolved->Set(v8::String::New("minimumIntegerDigits"), + v8::Integer::New(number_format->getMinimumIntegerDigits())); + + resolved->Set(v8::String::New("minimumFractionDigits"), + v8::Integer::New(number_format->getMinimumFractionDigits())); + + resolved->Set(v8::String::New("maximumFractionDigits"), + v8::Integer::New(number_format->getMaximumFractionDigits())); + + if (resolved->HasOwnProperty(v8::String::New("minimumSignificantDigits"))) { + resolved->Set(v8::String::New("minimumSignificantDigits"), v8::Integer::New( + number_format->getMinimumSignificantDigits())); + } + + if (resolved->HasOwnProperty(v8::String::New("maximumSignificantDigits"))) { + resolved->Set(v8::String::New("maximumSignificantDigits"), v8::Integer::New( + number_format->getMaximumSignificantDigits())); + } + + // Set the locale + char result[ULOC_FULLNAME_CAPACITY]; + status = U_ZERO_ERROR; + uloc_toLanguageTag( + icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status); + if (U_SUCCESS(status)) { + resolved->Set(v8::String::New("locale"), v8::String::New(result)); + } else { + // This would never happen, since we got the locale from ICU. + resolved->Set(v8::String::New("locale"), v8::String::New("und")); + } +} + +} // namespace v8_i18n |