Snapshot i18n Javascript code

src/extensions/i18n/break-iterator.js

-// 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.
-
-// ECMAScript 402 API implementation is broken into separate files for
-// each service. The build system combines them together into one
-// Intl namespace.
-
-/**
- * Initializes the given object so it's a valid BreakIterator instance.
- * Useful for subclassing.
- */
-function initializeBreakIterator(iterator, locales, options) {
-  if (iterator.hasOwnProperty('__initializedIntlObject')) {
-    throw new TypeError('Trying to re-initialize v8BreakIterator object.');
-  }
-
-  if (options === undefined) {
-    options = {};
-  }
-
-  var getOption = getGetOption(options, 'breakiterator');
-
-  var internalOptions = {};
-
-  defineWEProperty(internalOptions, 'type', getOption(
-    'type', 'string', ['character', 'word', 'sentence', 'line'], 'word'));
-
-  var locale = resolveLocale('breakiterator', locales, options);
-  var resolved = Object.defineProperties({}, {
-    requestedLocale: {value: locale.locale, writable: true},
-    type: {value: internalOptions.type, writable: true},
-    locale: {writable: true}
-  });
-
-  var internalIterator = %CreateBreakIterator(locale.locale,
-                                              internalOptions,
-                                              resolved);
-
-  Object.defineProperty(iterator, 'iterator', {value: internalIterator});
-  Object.defineProperty(iterator, 'resolved', {value: resolved});
-  Object.defineProperty(iterator, '__initializedIntlObject',
-                        {value: 'breakiterator'});
-
-  return iterator;
-}
-
-
-/**
- * Constructs Intl.v8BreakIterator object given optional locales and options
- * parameters.
- *
- * @constructor
- */
-%SetProperty(Intl, 'v8BreakIterator', function() {
-    var locales = arguments[0];
-    var options = arguments[1];
-
-    if (!this || this === Intl) {
-      // Constructor is called as a function.
-      return new Intl.v8BreakIterator(locales, options);
-    }
-
-    return initializeBreakIterator(toObject(this), locales, options);
-  },
-  ATTRIBUTES.DONT_ENUM
-);
-
-
-/**
- * BreakIterator resolvedOptions method.
- */
-%SetProperty(Intl.v8BreakIterator.prototype, 'resolvedOptions', function() {
-    if (%_IsConstructCall()) {
-      throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR);
-    }
-
-    if (!this || typeof this !== 'object' ||
-        this.__initializedIntlObject !== 'breakiterator') {
-      throw new TypeError('resolvedOptions method called on a non-object or ' +
-          'on a object that is not Intl.v8BreakIterator.');
-    }
-
-    var segmenter = this;
-    var locale = getOptimalLanguageTag(segmenter.resolved.requestedLocale,
-                                       segmenter.resolved.locale);
-
-    return {
-      locale: locale,
-      type: segmenter.resolved.type
-    };
-  },
-  ATTRIBUTES.DONT_ENUM
-);
-%FunctionSetName(Intl.v8BreakIterator.prototype.resolvedOptions,
-                 'resolvedOptions');
-%FunctionRemovePrototype(Intl.v8BreakIterator.prototype.resolvedOptions);
-%SetNativeFlag(Intl.v8BreakIterator.prototype.resolvedOptions);
-
-
-/**
- * Returns the subset of the given locale list for which this locale list
- * has a matching (possibly fallback) locale. Locales appear in the same
- * order in the returned list as in the input list.
- * Options are optional parameter.
- */
-%SetProperty(Intl.v8BreakIterator, 'supportedLocalesOf', function(locales) {
-    if (%_IsConstructCall()) {
-      throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR);
-    }
-
-    return supportedLocalesOf('breakiterator', locales, arguments[1]);
-  },
-  ATTRIBUTES.DONT_ENUM
-);
-%FunctionSetName(Intl.v8BreakIterator.supportedLocalesOf, 'supportedLocalesOf');
-%FunctionRemovePrototype(Intl.v8BreakIterator.supportedLocalesOf);
-%SetNativeFlag(Intl.v8BreakIterator.supportedLocalesOf);
-
-
-/**
- * Adopts text to segment using the iterator. Old text, if present,
- * gets discarded.
- */
-function adoptText(iterator, text) {
-  %BreakIteratorAdoptText(iterator.iterator, String(text));
-}
-
-
-/**
- * Returns index of the first break in the string and moves current pointer.
- */
-function first(iterator) {
-  return %BreakIteratorFirst(iterator.iterator);
-}
-
-
-/**
- * Returns the index of the next break and moves the pointer.
- */
-function next(iterator) {
-  return %BreakIteratorNext(iterator.iterator);
-}
-
-
-/**
- * Returns index of the current break.
- */
-function current(iterator) {
-  return %BreakIteratorCurrent(iterator.iterator);
-}
-
-
-/**
- * Returns type of the current break.
- */
-function breakType(iterator) {
-  return %BreakIteratorBreakType(iterator.iterator);
-}
-
-
-addBoundMethod(Intl.v8BreakIterator, 'adoptText', adoptText, 1);
-addBoundMethod(Intl.v8BreakIterator, 'first', first, 0);
-addBoundMethod(Intl.v8BreakIterator, 'next', next, 0);
-addBoundMethod(Intl.v8BreakIterator, 'current', current, 0);
-addBoundMethod(Intl.v8BreakIterator, 'breakType', breakType, 0);