Move i18n collator code to runtime.

src/extensions/i18n/collator.cc

Index: src/extensions/i18n/collator.cc
diff --git a/src/extensions/i18n/collator.cc b/src/extensions/i18n/collator.cc
deleted file mode 100644
index 61b1d63e5c2376d83d118191b8a25440c4851938..0000000000000000000000000000000000000000
--- a/src/extensions/i18n/collator.cc
+++ /dev/null
@@ -1,366 +0,0 @@
-// 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