Move i18n break iterator C++ code to runtime

src/extensions/i18n/break-iterator.cc

Index: src/extensions/i18n/break-iterator.cc
diff --git a/src/extensions/i18n/break-iterator.cc b/src/extensions/i18n/break-iterator.cc
deleted file mode 100644
index 0681e264ab0c68c73404a60ee883c5e18deef417..0000000000000000000000000000000000000000
--- a/src/extensions/i18n/break-iterator.cc
+++ /dev/null
@@ -1,333 +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.
-
-#include "break-iterator.h"
-
-#include <string.h>
-
-#include "i18n-utils.h"
-#include "unicode/brkiter.h"
-#include "unicode/locid.h"
-#include "unicode/rbbi.h"
-
-namespace v8_i18n {
-
-static v8::Handle<v8::Value> ThrowUnexpectedObjectError();
-static icu::UnicodeString* ResetAdoptedText(v8::Handle<v8::Object>,
-                                            v8::Handle<v8::Value>);
-static icu::BreakIterator* InitializeBreakIterator(v8::Handle<v8::String>,
-                                                   v8::Handle<v8::Object>,
-                                                   v8::Handle<v8::Object>);
-static icu::BreakIterator* CreateICUBreakIterator(const icu::Locale&,
-                                                  v8::Handle<v8::Object>);
-static void SetResolvedSettings(const icu::Locale&,
-                                icu::BreakIterator*,
-                                v8::Handle<v8::Object>);
-
-icu::BreakIterator* BreakIterator::UnpackBreakIterator(
-    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 BreakIterator 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("breakIterator"))) {
-    return static_cast<icu::BreakIterator*>(
-        obj->GetAlignedPointerFromInternalField(0));
-  }
-
-  return NULL;
-}
-
-void BreakIterator::DeleteBreakIterator(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 break iterator.
-  v8::HandleScope handle_scope(isolate);
-  v8::Local<v8::Object> handle = v8::Local<v8::Object>::New(isolate, *object);
-  delete UnpackBreakIterator(handle);
-
-  delete static_cast<icu::UnicodeString*>(
-      handle->GetAlignedPointerFromInternalField(1));
-
-  // 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("BreakIterator method called on an object "
-                      "that is not a BreakIterator.")));
-}
-
-
-// Deletes the old value and sets the adopted text in corresponding
-// JavaScript object.
-icu::UnicodeString* ResetAdoptedText(
-    v8::Handle<v8::Object> obj, v8::Handle<v8::Value> value) {
-  // Get the previous value from the internal field.
-  icu::UnicodeString* text = static_cast<icu::UnicodeString*>(
-      obj->GetAlignedPointerFromInternalField(1));
-  delete text;
-
-  // Assign new value to the internal pointer.
-  v8::String::Value text_value(value);
-  text = new icu::UnicodeString(
-      reinterpret_cast<const UChar*>(*text_value), text_value.length());
-  obj->SetAlignedPointerInInternalField(1, text);
-
-  // Return new unicode string pointer.
-  return text;
-}
-
-void BreakIterator::JSInternalBreakIteratorAdoptText(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  if (args.Length() != 2 || !args[0]->IsObject() || !args[1]->IsString()) {
-    v8::ThrowException(v8::Exception::Error(
-        v8::String::New(
-            "Internal error. Iterator and text have to be specified.")));
-    return;
-  }
-
-  icu::BreakIterator* break_iterator = UnpackBreakIterator(args[0]->ToObject());
-  if (!break_iterator) {
-    ThrowUnexpectedObjectError();
-    return;
-  }
-
-  break_iterator->setText(*ResetAdoptedText(args[0]->ToObject(), args[1]));
-}
-
-void BreakIterator::JSInternalBreakIteratorFirst(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  icu::BreakIterator* break_iterator = UnpackBreakIterator(args[0]->ToObject());
-  if (!break_iterator) {
-    ThrowUnexpectedObjectError();
-    return;
-  }
-
-  args.GetReturnValue().Set(static_cast<int32_t>(break_iterator->first()));
-}
-
-void BreakIterator::JSInternalBreakIteratorNext(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  icu::BreakIterator* break_iterator = UnpackBreakIterator(args[0]->ToObject());
-  if (!break_iterator) {
-    ThrowUnexpectedObjectError();
-    return;
-  }
-
-  args.GetReturnValue().Set(static_cast<int32_t>(break_iterator->next()));
-}
-
-void BreakIterator::JSInternalBreakIteratorCurrent(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  icu::BreakIterator* break_iterator = UnpackBreakIterator(args[0]->ToObject());
-  if (!break_iterator) {
-    ThrowUnexpectedObjectError();
-    return;
-  }
-
-  args.GetReturnValue().Set(static_cast<int32_t>(break_iterator->current()));
-}
-
-void BreakIterator::JSInternalBreakIteratorBreakType(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  icu::BreakIterator* break_iterator = UnpackBreakIterator(args[0]->ToObject());
-  if (!break_iterator) {
-    ThrowUnexpectedObjectError();
-    return;
-  }
-
-  // TODO(cira): Remove cast once ICU fixes base BreakIterator class.
-  icu::RuleBasedBreakIterator* rule_based_iterator =
-      static_cast<icu::RuleBasedBreakIterator*>(break_iterator);
-  int32_t status = rule_based_iterator->getRuleStatus();
-  // Keep return values in sync with JavaScript BreakType enum.
-  v8::Handle<v8::String> result;
-  if (status >= UBRK_WORD_NONE && status < UBRK_WORD_NONE_LIMIT) {
-    result = v8::String::New("none");
-  } else if (status >= UBRK_WORD_NUMBER && status < UBRK_WORD_NUMBER_LIMIT) {
-    result = v8::String::New("number");
-  } else if (status >= UBRK_WORD_LETTER && status < UBRK_WORD_LETTER_LIMIT) {
-    result = v8::String::New("letter");
-  } else if (status >= UBRK_WORD_KANA && status < UBRK_WORD_KANA_LIMIT) {
-    result = v8::String::New("kana");
-  } else if (status >= UBRK_WORD_IDEO && status < UBRK_WORD_IDEO_LIMIT) {
-    result = v8::String::New("ideo");
-  } else {
-    result = v8::String::New("unknown");
-  }
-  args.GetReturnValue().Set(result);
-}
-
-void BreakIterator::JSCreateBreakIterator(
-    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> break_iterator_template =
-      Utils::GetTemplate2(isolate);
-
-  // Create an empty object wrapper.
-  v8::Local<v8::Object> local_object = break_iterator_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 break iterator as internal field of the resulting JS object.
-  icu::BreakIterator* break_iterator = InitializeBreakIterator(
-      args[0]->ToString(), args[1]->ToObject(), args[2]->ToObject());
-
-  if (!break_iterator) {
-    v8::ThrowException(v8::Exception::Error(v8::String::New(
-        "Internal error. Couldn't create ICU break iterator.")));
-    return;
-  } else {
-    local_object->SetAlignedPointerInInternalField(0, break_iterator);
-    // Make sure that the pointer to adopted text is NULL.
-    local_object->SetAlignedPointerInInternalField(1, NULL);
-
-    v8::TryCatch try_catch;
-    local_object->Set(v8::String::New("breakIterator"),
-                      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, &DeleteBreakIterator);
-  args.GetReturnValue().Set(wrapper);
-  wrapper.ClearAndLeak();
-}
-
-static icu::BreakIterator* InitializeBreakIterator(
-    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::BreakIterator* break_iterator =
-    CreateICUBreakIterator(icu_locale, options);
-  if (!break_iterator) {
-    // Remove extensions and try again.
-    icu::Locale no_extension_locale(icu_locale.getBaseName());
-    break_iterator = CreateICUBreakIterator(no_extension_locale, options);
-
-    // Set resolved settings (locale).
-    SetResolvedSettings(no_extension_locale, break_iterator, resolved);
-  } else {
-    SetResolvedSettings(icu_locale, break_iterator, resolved);
-  }
-
-  return break_iterator;
-}
-
-static icu::BreakIterator* CreateICUBreakIterator(
-    const icu::Locale& icu_locale, v8::Handle<v8::Object> options) {
-  UErrorCode status = U_ZERO_ERROR;
-  icu::BreakIterator* break_iterator = NULL;
-  icu::UnicodeString type;
-  if (!Utils::ExtractStringSetting(options, "type", &type)) {
-    // Type had to be in the options. This would be an internal error.
-    return NULL;
-  }
-
-  if (type == UNICODE_STRING_SIMPLE("character")) {
-    break_iterator =
-      icu::BreakIterator::createCharacterInstance(icu_locale, status);
-  } else if (type == UNICODE_STRING_SIMPLE("sentence")) {
-    break_iterator =
-      icu::BreakIterator::createSentenceInstance(icu_locale, status);
-  } else if (type == UNICODE_STRING_SIMPLE("line")) {
-    break_iterator =
-      icu::BreakIterator::createLineInstance(icu_locale, status);
-  } else {
-    // Defualt is word iterator.
-    break_iterator =
-      icu::BreakIterator::createWordInstance(icu_locale, status);
-  }
-
-  if (U_FAILURE(status)) {
-    delete break_iterator;
-    return NULL;
-  }
-
-  return break_iterator;
-}
-
-static void SetResolvedSettings(const icu::Locale& icu_locale,
-                                icu::BreakIterator* date_format,
-                                v8::Handle<v8::Object> resolved) {
-  UErrorCode status = U_ZERO_ERROR;
-
-  // 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