Adding break iterator support to the i18n api extension.
This is vendor specific, and is prefixed by v8. WebKit layout tests will be added in a separate CL. Review URL: http://codereview.chromium.org/6610006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7051 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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cira@chromium.org
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229
src/extensions/experimental/break-iterator.cc
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229
src/extensions/experimental/break-iterator.cc
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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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// met:
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//
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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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//
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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 "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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namespace v8 {
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namespace internal {
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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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}
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return NULL;
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}
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void BreakIterator::DeleteBreakIterator(v8::Persistent<v8::Value> object,
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void* param) {
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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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// Then dispose of the persistent handle to JS object.
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persistent_object.Dispose();
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}
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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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}
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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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}
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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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}
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v8::String::Value text_value(args[0]);
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UnicodeString text(
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reinterpret_cast<const UChar*>(*text_value), text_value.length());
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break_iterator->setText(text);
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return v8::Undefined();
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}
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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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}
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return v8::Int32::New(break_iterator->first());
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}
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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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}
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return v8::Int32::New(break_iterator->next());
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}
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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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}
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return v8::Int32::New(break_iterator->current());
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}
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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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}
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// TODO(cira): Remove cast once ICU fixes base BreakIterator class.
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int32_t status =
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static_cast<RuleBasedBreakIterator*>(break_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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} else {
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return v8::Int32::New(-1);
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}
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}
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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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}
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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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break_iterator =
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icu::BreakIterator::createCharacterInstance(icu_locale, status);
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} else if (!strcmp(*type, "word")) {
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break_iterator =
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icu::BreakIterator::createWordInstance(icu_locale, status);
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} else if (!strcmp(*type, "sentence")) {
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break_iterator =
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icu::BreakIterator::createSentenceInstance(icu_locale, status);
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} else if (!strcmp(*type, "line")) {
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break_iterator =
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icu::BreakIterator::createLineInstance(icu_locale, status);
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} else {
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return v8::ThrowException(v8::Exception::SyntaxError(
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v8::String::New("Invalid iterator type.")));
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}
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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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}
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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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object_template->SetInternalFieldCount(1);
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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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}
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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 object handle weak so we can delete iterator once GC kicks in.
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wrapper.MakeWeak(NULL, DeleteBreakIterator);
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return wrapper;
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}
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} } // namespace v8::internal
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83
src/extensions/experimental/break-iterator.h
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83
src/extensions/experimental/break-iterator.h
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@ -0,0 +1,83 @@
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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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// met:
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//
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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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//
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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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#ifndef V8_EXTENSIONS_EXPERIMENTAL_BREAK_ITERATOR_H_
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#define V8_EXTENSIONS_EXPERIMENTAL_BREAK_ITERATOR_H_
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#include <v8.h>
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#include "unicode/uversion.h"
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namespace U_ICU_NAMESPACE {
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class BreakIterator;
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}
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namespace v8 {
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namespace internal {
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class BreakIterator {
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public:
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static v8::Handle<v8::Value> JSBreakIterator(const v8::Arguments& args);
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// Helper methods for various bindings.
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// Unpacks break iterator object from corresponding JavaScript object.
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static icu::BreakIterator* UnpackBreakIterator(v8::Handle<v8::Object> obj);
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// Release memory we allocated for the BreakIterator once the JS object that
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// holds the pointer gets garbage collected.
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static void DeleteBreakIterator(v8::Persistent<v8::Value> object,
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void* param);
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// Assigns new text to the iterator.
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static v8::Handle<v8::Value> BreakIteratorAdoptText(
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const v8::Arguments& args);
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// Moves iterator to the beginning of the string and returns new position.
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static v8::Handle<v8::Value> BreakIteratorFirst(const v8::Arguments& args);
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// Moves iterator to the next position and returns it.
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static v8::Handle<v8::Value> BreakIteratorNext(const v8::Arguments& args);
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// Returns current iterator's current position.
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static v8::Handle<v8::Value> BreakIteratorCurrent(
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const v8::Arguments& args);
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// Returns type of the item from current position.
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// This call is only valid for word break iterators. Others just return 0.
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static v8::Handle<v8::Value> BreakIteratorBreakType(
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const v8::Arguments& args);
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private:
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BreakIterator() {}
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static v8::Persistent<v8::FunctionTemplate> break_iterator_template_;
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};
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} } // namespace v8::internal
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#endif // V8_EXTENSIONS_EXPERIMENTAL_BREAK_ITERATOR_H_
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@ -37,6 +37,8 @@
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'target_name': 'i18n_api',
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'type': 'static_library',
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'sources': [
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'break-iterator.cc',
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'break-iterator.h',
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'i18n-extension.cc',
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'i18n-extension.h',
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],
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@ -30,6 +30,7 @@
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#include <algorithm>
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#include <string>
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#include "break-iterator.h"
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#include "unicode/locid.h"
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#include "unicode/uloc.h"
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@ -87,6 +88,23 @@ const char* const I18NExtension::kSource =
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" var displayLocale = this.displayLocale_(optDisplayLocale);"
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" native function NativeJSDisplayName();"
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" return NativeJSDisplayName(this.locale, displayLocale);"
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"};"
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"v8Locale.v8BreakIterator = function(locale, type) {"
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" native function NativeJSBreakIterator();"
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" var iterator = NativeJSBreakIterator(locale, type);"
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" iterator.type = type;"
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" return iterator;"
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"};"
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"v8Locale.v8BreakIterator.BreakType = {"
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" 'unknown': -1,"
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" 'none': 0,"
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" 'number': 100,"
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" 'word': 200,"
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" 'kana': 300,"
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" 'ideo': 400"
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"};"
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"v8Locale.prototype.v8CreateBreakIterator = function(type) {"
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" return new v8Locale.v8BreakIterator(this.locale, type);"
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"};";
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v8::Handle<v8::FunctionTemplate> I18NExtension::GetNativeFunction(
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@ -107,6 +125,8 @@ v8::Handle<v8::FunctionTemplate> I18NExtension::GetNativeFunction(
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return v8::FunctionTemplate::New(JSDisplayRegion);
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} else if (name->Equals(v8::String::New("NativeJSDisplayName"))) {
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return v8::FunctionTemplate::New(JSDisplayName);
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} else if (name->Equals(v8::String::New("NativeJSBreakIterator"))) {
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return v8::FunctionTemplate::New(BreakIterator::JSBreakIterator);
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}
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return v8::Handle<v8::FunctionTemplate>();
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