diff options
Diffstat (limited to 'chromium/v8/src/extensions/i18n/collator.cc')
| -rw-r--r-- | chromium/v8/src/extensions/i18n/collator.cc | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/chromium/v8/src/extensions/i18n/collator.cc b/chromium/v8/src/extensions/i18n/collator.cc new file mode 100644 index 00000000000..61b1d63e5c2 --- /dev/null +++ b/chromium/v8/src/extensions/i18n/collator.cc @@ -0,0 +1,366 @@ +// 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 "collator.h" + +#include "i18n-utils.h" +#include "unicode/coll.h" +#include "unicode/locid.h" +#include "unicode/ucol.h" + +namespace v8_i18n { + +static icu::Collator* InitializeCollator( + v8::Handle<v8::String>, v8::Handle<v8::Object>, v8::Handle<v8::Object>); + +static icu::Collator* CreateICUCollator( + const icu::Locale&, v8::Handle<v8::Object>); + +static bool SetBooleanAttribute( + UColAttribute, const char*, v8::Handle<v8::Object>, icu::Collator*); + +static void SetResolvedSettings( + const icu::Locale&, icu::Collator*, v8::Handle<v8::Object>); + +static void SetBooleanSetting( + UColAttribute, icu::Collator*, const char*, v8::Handle<v8::Object>); + +icu::Collator* Collator::UnpackCollator(v8::Handle<v8::Object> obj) { + v8::HandleScope handle_scope; + + if (obj->HasOwnProperty(v8::String::New("collator"))) { + return static_cast<icu::Collator*>( + obj->GetAlignedPointerFromInternalField(0)); + } + + return NULL; +} + +void Collator::DeleteCollator(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 collator. + v8::HandleScope handle_scope(isolate); + v8::Local<v8::Object> handle = v8::Local<v8::Object>::New(isolate, *object); + delete UnpackCollator(handle); + + // Then dispose of the persistent handle to JS object. + object->Dispose(isolate); +} + + +// Throws a JavaScript exception. +static v8::Handle<v8::Value> ThrowUnexpectedObjectError() { + // Returns undefined, and schedules an exception to be thrown. + return v8::ThrowException(v8::Exception::Error( + v8::String::New("Collator method called on an object " + "that is not a Collator."))); +} + + +// When there's an ICU error, throw a JavaScript error with |message|. +static v8::Handle<v8::Value> ThrowExceptionForICUError(const char* message) { + return v8::ThrowException(v8::Exception::Error(v8::String::New(message))); +} + + +// static +void Collator::JSInternalCompare( + const v8::FunctionCallbackInfo<v8::Value>& args) { + if (args.Length() != 3 || !args[0]->IsObject() || + !args[1]->IsString() || !args[2]->IsString()) { + v8::ThrowException(v8::Exception::SyntaxError( + v8::String::New("Collator and two string arguments are required."))); + return; + } + + icu::Collator* collator = UnpackCollator(args[0]->ToObject()); + if (!collator) { + ThrowUnexpectedObjectError(); + return; + } + + v8::String::Value string_value1(args[1]); + v8::String::Value string_value2(args[2]); + const UChar* string1 = reinterpret_cast<const UChar*>(*string_value1); + const UChar* string2 = reinterpret_cast<const UChar*>(*string_value2); + UErrorCode status = U_ZERO_ERROR; + UCollationResult result = collator->compare( + string1, string_value1.length(), string2, string_value2.length(), status); + + if (U_FAILURE(status)) { + ThrowExceptionForICUError( + "Internal error. Unexpected failure in Collator.compare."); + return; + } + + args.GetReturnValue().Set(result); +} + +void Collator::JSCreateCollator( + const v8::FunctionCallbackInfo<v8::Value>& args) { + if (args.Length() != 3 || !args[0]->IsString() || !args[1]->IsObject() || + !args[2]->IsObject()) { + v8::ThrowException(v8::Exception::SyntaxError( + v8::String::New("Internal error, wrong parameters."))); + return; + } + + v8::Isolate* isolate = args.GetIsolate(); + v8::Local<v8::ObjectTemplate> intl_collator_template = + Utils::GetTemplate(isolate); + + // Create an empty object wrapper. + v8::Local<v8::Object> local_object = intl_collator_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 collator as internal field of the resulting JS object. + icu::Collator* collator = InitializeCollator( + args[0]->ToString(), args[1]->ToObject(), args[2]->ToObject()); + + if (!collator) { + v8::ThrowException(v8::Exception::Error(v8::String::New( + "Internal error. Couldn't create ICU collator."))); + return; + } else { + local_object->SetAlignedPointerInInternalField(0, collator); + + // Make it safer to unpack later on. + v8::TryCatch try_catch; + local_object->Set(v8::String::New("collator"), 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, &DeleteCollator); + args.GetReturnValue().Set(wrapper); + wrapper.ClearAndLeak(); +} + +static icu::Collator* InitializeCollator(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::Collator* collator = CreateICUCollator(icu_locale, options); + if (!collator) { + // Remove extensions and try again. + icu::Locale no_extension_locale(icu_locale.getBaseName()); + collator = CreateICUCollator(no_extension_locale, options); + + // Set resolved settings (pattern, numbering system). + SetResolvedSettings(no_extension_locale, collator, resolved); + } else { + SetResolvedSettings(icu_locale, collator, resolved); + } + + return collator; +} + +static icu::Collator* CreateICUCollator( + const icu::Locale& icu_locale, v8::Handle<v8::Object> options) { + // Make collator from options. + icu::Collator* collator = NULL; + UErrorCode status = U_ZERO_ERROR; + collator = icu::Collator::createInstance(icu_locale, status); + + if (U_FAILURE(status)) { + delete collator; + return NULL; + } + + // Set flags first, and then override them with sensitivity if necessary. + SetBooleanAttribute(UCOL_NUMERIC_COLLATION, "numeric", options, collator); + + // Normalization is always on, by the spec. We are free to optimize + // if the strings are already normalized (but we don't have a way to tell + // that right now). + collator->setAttribute(UCOL_NORMALIZATION_MODE, UCOL_ON, status); + + icu::UnicodeString case_first; + if (Utils::ExtractStringSetting(options, "caseFirst", &case_first)) { + if (case_first == UNICODE_STRING_SIMPLE("upper")) { + collator->setAttribute(UCOL_CASE_FIRST, UCOL_UPPER_FIRST, status); + } else if (case_first == UNICODE_STRING_SIMPLE("lower")) { + collator->setAttribute(UCOL_CASE_FIRST, UCOL_LOWER_FIRST, status); + } else { + // Default (false/off). + collator->setAttribute(UCOL_CASE_FIRST, UCOL_OFF, status); + } + } + + icu::UnicodeString sensitivity; + if (Utils::ExtractStringSetting(options, "sensitivity", &sensitivity)) { + if (sensitivity == UNICODE_STRING_SIMPLE("base")) { + collator->setStrength(icu::Collator::PRIMARY); + } else if (sensitivity == UNICODE_STRING_SIMPLE("accent")) { + collator->setStrength(icu::Collator::SECONDARY); + } else if (sensitivity == UNICODE_STRING_SIMPLE("case")) { + collator->setStrength(icu::Collator::PRIMARY); + collator->setAttribute(UCOL_CASE_LEVEL, UCOL_ON, status); + } else { + // variant (default) + collator->setStrength(icu::Collator::TERTIARY); + } + } + + bool ignore; + if (Utils::ExtractBooleanSetting(options, "ignorePunctuation", &ignore)) { + if (ignore) { + collator->setAttribute(UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, status); + } + } + + return collator; +} + +static bool SetBooleanAttribute(UColAttribute attribute, + const char* name, + v8::Handle<v8::Object> options, + icu::Collator* collator) { + UErrorCode status = U_ZERO_ERROR; + bool result; + if (Utils::ExtractBooleanSetting(options, name, &result)) { + collator->setAttribute(attribute, result ? UCOL_ON : UCOL_OFF, status); + if (U_FAILURE(status)) { + return false; + } + } + + return true; +} + +static void SetResolvedSettings(const icu::Locale& icu_locale, + icu::Collator* collator, + v8::Handle<v8::Object> resolved) { + SetBooleanSetting(UCOL_NUMERIC_COLLATION, collator, "numeric", resolved); + + UErrorCode status = U_ZERO_ERROR; + + switch (collator->getAttribute(UCOL_CASE_FIRST, status)) { + case UCOL_LOWER_FIRST: + resolved->Set(v8::String::New("caseFirst"), v8::String::New("lower")); + break; + case UCOL_UPPER_FIRST: + resolved->Set(v8::String::New("caseFirst"), v8::String::New("upper")); + break; + default: + resolved->Set(v8::String::New("caseFirst"), v8::String::New("false")); + } + + switch (collator->getAttribute(UCOL_STRENGTH, status)) { + case UCOL_PRIMARY: { + resolved->Set(v8::String::New("strength"), v8::String::New("primary")); + + // case level: true + s1 -> case, s1 -> base. + if (UCOL_ON == collator->getAttribute(UCOL_CASE_LEVEL, status)) { + resolved->Set(v8::String::New("sensitivity"), v8::String::New("case")); + } else { + resolved->Set(v8::String::New("sensitivity"), v8::String::New("base")); + } + break; + } + case UCOL_SECONDARY: + resolved->Set(v8::String::New("strength"), v8::String::New("secondary")); + resolved->Set(v8::String::New("sensitivity"), v8::String::New("accent")); + break; + case UCOL_TERTIARY: + resolved->Set(v8::String::New("strength"), v8::String::New("tertiary")); + resolved->Set(v8::String::New("sensitivity"), v8::String::New("variant")); + break; + case UCOL_QUATERNARY: + // We shouldn't get quaternary and identical from ICU, but if we do + // put them into variant. + resolved->Set(v8::String::New("strength"), v8::String::New("quaternary")); + resolved->Set(v8::String::New("sensitivity"), v8::String::New("variant")); + break; + default: + resolved->Set(v8::String::New("strength"), v8::String::New("identical")); + resolved->Set(v8::String::New("sensitivity"), v8::String::New("variant")); + } + + if (UCOL_SHIFTED == collator->getAttribute(UCOL_ALTERNATE_HANDLING, status)) { + resolved->Set(v8::String::New("ignorePunctuation"), + v8::Boolean::New(true)); + } else { + resolved->Set(v8::String::New("ignorePunctuation"), + v8::Boolean::New(false)); + } + + // 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")); + } +} + +static void SetBooleanSetting(UColAttribute attribute, + icu::Collator* collator, + const char* property, + v8::Handle<v8::Object> resolved) { + UErrorCode status = U_ZERO_ERROR; + if (UCOL_ON == collator->getAttribute(attribute, status)) { + resolved->Set(v8::String::New(property), v8::Boolean::New(true)); + } else { + resolved->Set(v8::String::New(property), v8::Boolean::New(false)); + } +} + +} // namespace v8_i18n |