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// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "extensions/experimental/break-iterator.h"
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#include "unicode/brkiter.h"
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#include "unicode/locid.h"
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#include "unicode/rbbi.h"
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v8::Persistent<v8::FunctionTemplate> BreakIterator::break_iterator_template_;
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icu::BreakIterator* BreakIterator::UnpackBreakIterator(
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v8::Handle<v8::Object> obj) {
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if (break_iterator_template_->HasInstance(obj)) {
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return static_cast<icu::BreakIterator*>(
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obj->GetPointerFromInternalField(0));
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icu::UnicodeString* BreakIterator::ResetAdoptedText(
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v8::Handle<v8::Object> obj, v8::Handle<v8::Value> value) {
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// Get the previous value from the internal field.
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icu::UnicodeString* text = static_cast<icu::UnicodeString*>(
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obj->GetPointerFromInternalField(1));
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// Assign new value to the internal pointer.
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v8::String::Value text_value(value);
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text = new icu::UnicodeString(
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reinterpret_cast<const UChar*>(*text_value), text_value.length());
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obj->SetPointerInInternalField(1, text);
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// Return new unicode string pointer.
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void BreakIterator::DeleteBreakIterator(v8::Persistent<v8::Value> object,
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v8::Persistent<v8::Object> persistent_object =
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v8::Persistent<v8::Object>::Cast(object);
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// First delete the hidden C++ object.
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// Unpacking should never return NULL here. That would only happen if
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// this method is used as the weak callback for persistent handles not
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// pointing to a break iterator.
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delete UnpackBreakIterator(persistent_object);
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delete static_cast<icu::UnicodeString*>(
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persistent_object->GetPointerFromInternalField(1));
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// Then dispose of the persistent handle to JS object.
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persistent_object.Dispose();
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// Throws a JavaScript exception.
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static v8::Handle<v8::Value> ThrowUnexpectedObjectError() {
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// Returns undefined, and schedules an exception to be thrown.
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return v8::ThrowException(v8::Exception::Error(
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v8::String::New("BreakIterator method called on an object "
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"that is not a BreakIterator.")));
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v8::Handle<v8::Value> BreakIterator::BreakIteratorAdoptText(
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const v8::Arguments& args) {
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if (args.Length() != 1 || !args[0]->IsString()) {
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return v8::ThrowException(v8::Exception::SyntaxError(
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v8::String::New("Text input is required.")));
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icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder());
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if (!break_iterator) {
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return ThrowUnexpectedObjectError();
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break_iterator->setText(*ResetAdoptedText(args.Holder(), args[0]));
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return v8::Undefined();
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v8::Handle<v8::Value> BreakIterator::BreakIteratorFirst(
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const v8::Arguments& args) {
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icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder());
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if (!break_iterator) {
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return ThrowUnexpectedObjectError();
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return v8::Int32::New(break_iterator->first());
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v8::Handle<v8::Value> BreakIterator::BreakIteratorNext(
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const v8::Arguments& args) {
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icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder());
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if (!break_iterator) {
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return ThrowUnexpectedObjectError();
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return v8::Int32::New(break_iterator->next());
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v8::Handle<v8::Value> BreakIterator::BreakIteratorCurrent(
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const v8::Arguments& args) {
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icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder());
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if (!break_iterator) {
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return ThrowUnexpectedObjectError();
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return v8::Int32::New(break_iterator->current());
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v8::Handle<v8::Value> BreakIterator::BreakIteratorBreakType(
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const v8::Arguments& args) {
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icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder());
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if (!break_iterator) {
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return ThrowUnexpectedObjectError();
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// TODO(cira): Remove cast once ICU fixes base BreakIterator class.
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icu::RuleBasedBreakIterator* rule_based_iterator =
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static_cast<icu::RuleBasedBreakIterator*>(break_iterator);
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int32_t status = rule_based_iterator->getRuleStatus();
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// Keep return values in sync with JavaScript BreakType enum.
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if (status >= UBRK_WORD_NONE && status < UBRK_WORD_NONE_LIMIT) {
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return v8::Int32::New(UBRK_WORD_NONE);
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} else if (status >= UBRK_WORD_NUMBER && status < UBRK_WORD_NUMBER_LIMIT) {
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return v8::Int32::New(UBRK_WORD_NUMBER);
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} else if (status >= UBRK_WORD_LETTER && status < UBRK_WORD_LETTER_LIMIT) {
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return v8::Int32::New(UBRK_WORD_LETTER);
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} else if (status >= UBRK_WORD_KANA && status < UBRK_WORD_KANA_LIMIT) {
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return v8::Int32::New(UBRK_WORD_KANA);
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} else if (status >= UBRK_WORD_IDEO && status < UBRK_WORD_IDEO_LIMIT) {
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return v8::Int32::New(UBRK_WORD_IDEO);
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return v8::Int32::New(-1);
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v8::Handle<v8::Value> BreakIterator::JSBreakIterator(
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const v8::Arguments& args) {
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v8::HandleScope handle_scope;
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if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsString()) {
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return v8::ThrowException(v8::Exception::SyntaxError(
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v8::String::New("Locale and iterator type are required.")));
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v8::String::Utf8Value locale(args[0]);
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icu::Locale icu_locale(*locale);
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UErrorCode status = U_ZERO_ERROR;
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icu::BreakIterator* break_iterator = NULL;
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v8::String::Utf8Value type(args[1]);
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if (!strcmp(*type, "character")) {
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icu::BreakIterator::createCharacterInstance(icu_locale, status);
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} else if (!strcmp(*type, "word")) {
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icu::BreakIterator::createWordInstance(icu_locale, status);
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} else if (!strcmp(*type, "sentence")) {
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icu::BreakIterator::createSentenceInstance(icu_locale, status);
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} else if (!strcmp(*type, "line")) {
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icu::BreakIterator::createLineInstance(icu_locale, status);
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return v8::ThrowException(v8::Exception::SyntaxError(
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v8::String::New("Invalid iterator type.")));
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if (U_FAILURE(status)) {
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delete break_iterator;
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return v8::ThrowException(v8::Exception::Error(
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v8::String::New("Failed to create break iterator.")));
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if (break_iterator_template_.IsEmpty()) {
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v8::Local<v8::FunctionTemplate> raw_template(v8::FunctionTemplate::New());
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raw_template->SetClassName(v8::String::New("v8Locale.v8BreakIterator"));
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// Define internal field count on instance template.
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v8::Local<v8::ObjectTemplate> object_template =
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raw_template->InstanceTemplate();
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// Set aside internal fields for icu break iterator and adopted text.
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object_template->SetInternalFieldCount(2);
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// Define all of the prototype methods on prototype template.
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v8::Local<v8::ObjectTemplate> proto = raw_template->PrototypeTemplate();
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proto->Set(v8::String::New("adoptText"),
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v8::FunctionTemplate::New(BreakIteratorAdoptText));
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proto->Set(v8::String::New("first"),
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v8::FunctionTemplate::New(BreakIteratorFirst));
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proto->Set(v8::String::New("next"),
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v8::FunctionTemplate::New(BreakIteratorNext));
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proto->Set(v8::String::New("current"),
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v8::FunctionTemplate::New(BreakIteratorCurrent));
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proto->Set(v8::String::New("breakType"),
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v8::FunctionTemplate::New(BreakIteratorBreakType));
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break_iterator_template_ =
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v8::Persistent<v8::FunctionTemplate>::New(raw_template);
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// Create an empty object wrapper.
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v8::Local<v8::Object> local_object =
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break_iterator_template_->GetFunction()->NewInstance();
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v8::Persistent<v8::Object> wrapper =
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v8::Persistent<v8::Object>::New(local_object);
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// Set break iterator as internal field of the resulting JS object.
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wrapper->SetPointerInInternalField(0, break_iterator);
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// Make sure that the pointer to adopted text is NULL.
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wrapper->SetPointerInInternalField(1, NULL);
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// Make object handle weak so we can delete iterator once GC kicks in.
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wrapper.MakeWeak(NULL, DeleteBreakIterator);
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} // namespace v8_i18n
added
removed
src/extensions/experimental/break-iterator.cc
