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Unified Diff: lib/i18n/intl.dart

Issue 10827227: Start moving non-platform libraries from lib/ to pkg/ . (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Start moving non-platform libraries from lib/ to pkg/ Created 8 years, 4 months ago
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Index: lib/i18n/intl.dart
===================================================================
--- lib/i18n/intl.dart (revision 10654)
+++ lib/i18n/intl.dart (working copy)
@@ -1,188 +0,0 @@
-// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#library('intl');
-
-#import('dart:web');
-
-#import('date_format.dart');
-#source('intl_message.dart');
-#source('bidi_formatter.dart');
-#source('bidi_utils.dart');
-
-/**
- * Internationalization object providing access to message formatting objects,
- * date formatting, parsing, bidirectional text relative to a specific locale.
- */
-
-class Intl {
- /**
- * String indicating the locale code with which the message is to be
- * formatted (such as en-CA).
- */
- static String _locale;
-
- IntlMessage intlMsg;
-
- /**
- * Return a new date format using the specified [pattern].
- * If [desiredLocale] is not specified, then we default to [locale].
- */
- DateFormat date(String pattern, [String desiredLocale]) {
- var actualLocale = (desiredLocale == null) ? _locale : desiredLocale;
- return new DateFormat(pattern, actualLocale);
- }
-
- /**
- * Constructor optionally [_locale] for specifics of the language
- * locale to be used, otherwise, we will attempt to infer it (acceptable if
- * Dart is running on the client, we can infer from the browser/client
- * preferences).
- */
- Intl([a_locale]) {
- if (a_locale == null) {
- _locale = _getDefaultLocale();
- } else {
- _locale = verifiedLocale(a_locale);
- }
- intlMsg = new IntlMessage(_locale);
- }
-
- /**
- * Create a message that can be internationalized. It takes a
- * [message_str] that will be translated, which may be interpolated
- * based on one or more variables, a [desc] providing a description of usage
- * for the [message_str], and a map of [examples] for each data element to be
- * substituted into the message. For example, if message="Hello, $name", then
- * examples = {'name': 'Sparky'}. If not using the user's default locale, or
- * if the locale is not easily detectable, explicitly pass [locale].
- * The values of [desc] and [examples] are not used at run-time but are only
- * made available to the translators, so they MUST be simple Strings available
- * at compile time: no String interpolation or concatenation.
- * The expected usage of this is inside a function that takes as parameters
- * the variables used in the interpolated string, and additionally also a
- * locale (optional).
- */
- static String message(String message_str, [final String desc='',
- final Map examples=const {}, String locale='']) {
- return message_str;
- }
-
- /**
- * Return the locale for this instance. If none was set, the locale will
- * be the default.
- */
- String get locale() => _locale;
-
- /**
- * Return true if the locale exists, or if it is null. The null case
- * is interpreted to mean that we use the default locale.
- */
- static bool _localeExists(localeName) {
- return DateFormat.localeExists(localeName);
- }
-
- /**
- * Given [newLocale] return a locale that we have data for that is similar
- * to it, if possible.
- * If [newLocale] is found directly, return it. If it can't be found, look up
- * based on just the language (e.g. 'en_CA' -> 'en'). Also accepts '-'
- * as a separator and changes it into '_' for lookup, and changes the
- * country to uppercase.
- * Note that null is interpreted as meaning the default locale, so if
- * [newLocale] is null it will be returned.
- */
- static String verifiedLocale(String newLocale) {
- if (newLocale == null) return _getDefaultLocale();
- if (_localeExists(newLocale)) {
- return newLocale;
- }
- for (var each in [_canonicalized(newLocale), _shortLocale(newLocale)]) {
- if (_localeExists(each)) {
- return each;
- }
- }
- throw new IllegalArgumentException("Invalid locale '$newLocale'");
- }
-
- /** Return the short version of a locale name, e.g. 'en_US' => 'en' */
- static String _shortLocale(String aLocale) {
- if (aLocale.length < 2) return aLocale;
- return aLocale.substring(0, 2).toLowerCase();
- }
-
- /**
- * Return a locale name turned into xx_YY where it might possibly be
- * in the wrong case or with a hyphen instead of an underscore.
- */
- static String _canonicalized(String aLocale) {
- // Locales of length < 5 are presumably two-letter forms, or else malformed.
- // Locales of length > 6 are likely to be malformed. In either case we
- // return them unmodified and if correct they will be found.
- if ((aLocale.length < 5) || (aLocale.length > 6)) return aLocale;
- if (aLocale[2] != '-' && (aLocale[2] != '_')) return aLocale;
- return '${aLocale[0]}${aLocale[1]}_${aLocale[3].toUpperCase()}'
- '${aLocale[4].toUpperCase()}';
- }
-
- /**
- * Support method for message formatting. Select the correct plural form from
- * [cases] given [howMany].
- */
- static String plural(var howMany, Map cases, [num offset=0]) {
- // TODO(efortuna): Deal with "few" and "many" cases, offset, and others!
- return select(howMany.toString(), cases);
- }
-
- /**
- * Format the given function with a specific [locale], given a
- * [msg_function] that takes no parameters and returns a String. We
- * basically delay calling the message function proper until after the proper
- * locale has been set.
- */
- static String withLocale(String locale, Function msg_function) {
- // We have to do this silliness because Locale is not known at compile time,
- // but must be a static variable.
- if (_locale == null) _locale = _getDefaultLocale();
- var oldLocale = _locale;
- _locale = locale;
- var result = msg_function();
- _locale = oldLocale;
- return result;
- }
-
- /**
- * Support method for message formatting. Select the correct exact (gender,
- * usually) form from [cases] given the user [choice].
- */
- static String select(String choice, Map cases) {
- if (cases.containsKey(choice)) {
- return cases[choice];
- } else if (cases.containsKey('other')){
- return cases['other'];
- } else {
- return '';
- }
- }
-
- /**
- * Helper to detect the locale as defined at runtime.
- */
- static String _getDefaultLocale() {
- // TODO(efortuna): Detect the default locale given the user preferences.
- // That would mean using window.navigator.language in a browser or
- // an environment variable or other OS mechanism for the standalone VM.
- // Yay, hard-coding for now!
- return 'en_US';
- }
-
- /**
- * Accessor for the current locale. This should always == the default locale,
- * unless for some reason this gets called inside a message that resets the
- * locale.
- */
- static String getCurrentLocale() {
- return _locale;
- }
-}
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