Removing experimental i18n code from v8 repository. Internationalization support is hosted under ...

src/extensions/experimental/collator.cc

-// Copyright 2011 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.
-
-#include "src/extensions/experimental/collator.h"
-
-#include "unicode/coll.h"
-#include "unicode/locid.h"
-#include "unicode/ucol.h"
-
-namespace v8 {
-namespace internal {
-
-v8::Persistent<v8::FunctionTemplate> Collator::collator_template_;
-
-icu::Collator* Collator::UnpackCollator(v8::Handle<v8::Object> obj) {
-  if (collator_template_->HasInstance(obj)) {
-    return static_cast<icu::Collator*>(obj->GetPointerFromInternalField(0));
-  }
-
-  return NULL;
-}
-
-void Collator::DeleteCollator(v8::Persistent<v8::Value> object, void* param) {
-  v8::Persistent<v8::Object> persistent_object =
-      v8::Persistent<v8::Object>::Cast(object);
-
-  // 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.
-  delete UnpackCollator(persistent_object);
-
-  // Then dispose of the persistent handle to JS object.
-  persistent_object.Dispose();
-}
-
-// 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.")));
-}
-
-// Extract a boolean option named in |option| and set it to |result|.
-// Return true if it's specified. Otherwise, return false.
-static bool ExtractBooleanOption(const v8::Local<v8::Object>& options,
-                                 const char* option,
-                                 bool* result) {
-  v8::HandleScope handle_scope;
-  v8::TryCatch try_catch;
-  v8::Handle<v8::Value> value = options->Get(v8::String::New(option));
-  if (try_catch.HasCaught()) {
-    return false;
-  }
-  // No need to check if |value| is empty because it's taken care of
-  // by TryCatch above.
-  if (!value->IsUndefined() && !value->IsNull()) {
-    if (value->IsBoolean()) {
-      *result = value->BooleanValue();
-      return true;
-    }
-  }
-  return false;
-}
-
-// 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)));
-}
-
-v8::Handle<v8::Value> Collator::CollatorCompare(const v8::Arguments& args) {
-  if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsString()) {
-    return v8::ThrowException(v8::Exception::SyntaxError(
-        v8::String::New("Two string arguments are required.")));
-  }
-
-  icu::Collator* collator = UnpackCollator(args.Holder());
-  if (!collator) {
-    return ThrowUnexpectedObjectError();
-  }
-
-  v8::String::Value string_value1(args[0]);
-  v8::String::Value string_value2(args[1]);
-  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)) {
-    return ThrowExceptionForICUError(
-        "Unexpected failure in Collator.compare.");
-  }
-
-  return v8::Int32::New(result);
-}
-
-v8::Handle<v8::Value> Collator::JSCollator(const v8::Arguments& args) {
-  v8::HandleScope handle_scope;
-
-  if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsObject()) {
-    return v8::ThrowException(v8::Exception::SyntaxError(
-        v8::String::New("Locale and collation options are required.")));
-  }
-
-  v8::String::AsciiValue locale(args[0]);
-  icu::Locale icu_locale(*locale);
-
-  icu::Collator* collator = NULL;
-  UErrorCode status = U_ZERO_ERROR;
-  collator = icu::Collator::createInstance(icu_locale, status);
-
-  if (U_FAILURE(status)) {
-    delete collator;
-    return ThrowExceptionForICUError("Failed to create collator.");
-  }
-
-  v8::Local<v8::Object> options(args[1]->ToObject());
-
-  // Below, we change collation options that are explicitly specified
-  // by a caller in JavaScript. Otherwise, we don't touch because
-  // we don't want to change the locale-dependent default value.
-  // The three options below are very likely to have the same default
-  // across locales, but I haven't checked them all. Others we may add
-  // in the future have certainly locale-dependent default (e.g.
-  // caseFirst is upperFirst for Danish while is off for most other locales).
-
-  bool ignore_case, ignore_accents, numeric;
-
-  if (ExtractBooleanOption(options, "ignoreCase", &ignore_case)) {
-    // We need to explicitly set the level to secondary to get case ignored.
-    // The default L3 ignores UCOL_CASE_LEVEL == UCOL_OFF !
-    if (ignore_case) {
-      collator->setStrength(icu::Collator::SECONDARY);
-    }
-    collator->setAttribute(UCOL_CASE_LEVEL, ignore_case ? UCOL_OFF : UCOL_ON,
-                           status);
-    if (U_FAILURE(status)) {
-      delete collator;
-      return ThrowExceptionForICUError("Failed to set ignoreCase.");
-    }
-  }
-
-  // Accents are taken into account with strength secondary or higher.
-  if (ExtractBooleanOption(options, "ignoreAccents", &ignore_accents)) {
-    if (!ignore_accents) {
-      collator->setStrength(icu::Collator::SECONDARY);
-    } else {
-      collator->setStrength(icu::Collator::PRIMARY);
-    }
-  }
-
-  if (ExtractBooleanOption(options, "numeric", &numeric)) {
-    collator->setAttribute(UCOL_NUMERIC_COLLATION,
-                           numeric ? UCOL_ON : UCOL_OFF, status);
-    if (U_FAILURE(status)) {
-      delete collator;
-      return ThrowExceptionForICUError("Failed to set numeric sort option.");
-    }
-  }
-
-  if (collator_template_.IsEmpty()) {
-    v8::Local<v8::FunctionTemplate> raw_template(v8::FunctionTemplate::New());
-    raw_template->SetClassName(v8::String::New("v8Locale.Collator"));
-
-    // Define internal field count on instance template.
-    v8::Local<v8::ObjectTemplate> object_template =
-        raw_template->InstanceTemplate();
-
-    // Set aside internal fields for icu collator.
-    object_template->SetInternalFieldCount(1);
-
-    // Define all of the prototype methods on prototype template.
-    v8::Local<v8::ObjectTemplate> proto = raw_template->PrototypeTemplate();
-    proto->Set(v8::String::New("compare"),
-               v8::FunctionTemplate::New(CollatorCompare));
-
-    collator_template_ =
-        v8::Persistent<v8::FunctionTemplate>::New(raw_template);
-  }
-
-  // Create an empty object wrapper.
-  v8::Local<v8::Object> local_object =
-      collator_template_->GetFunction()->NewInstance();
-  v8::Persistent<v8::Object> wrapper =
-      v8::Persistent<v8::Object>::New(local_object);
-
-  // Set collator as internal field of the resulting JS object.
-  wrapper->SetPointerInInternalField(0, collator);
-
-  // Make object handle weak so we can delete iterator once GC kicks in.
-  wrapper.MakeWeak(NULL, DeleteCollator);
-
-  return wrapper;
-}
-
-} }  // namespace v8::internal