Roll Observatory packages and add a roll script

charted/lib/locale/format/time_format.dart

-/*
- * Copyright 2014 Google Inc. All rights reserved.
- *
- * Use of this source code is governed by a BSD-style
- * license that can be found in the LICENSE file or at
- * https://developers.google.com/open-source/licenses/bsd
- */
-part of charted.locale.format;
-
-typedef String TimeFormatFunction(DateTime date);
-
-//TODO(songrenchu): Document time format; Add test for time format.
-
-class TimeFormat {
-  String _template;
-  String _locale;
-  DateFormat _dateFormat;
-
-  TimeFormat([String template = null, String identifier = 'en_US']) {
-    _template = template;
-    _locale = identifier;
-    if (_template != null)
-      _dateFormat = new DateFormat(_wrapStrptime2ICU(_template), _locale);
-  }
-
-  TimeFormat _getInstance(String template) {
-    return new TimeFormat(template, _locale);
-  }
-
-  String apply(DateTime date) {
-    assert(_dateFormat != null);
-    return _dateFormat.format(date);
-  }
-
-  String toString() => _template;
-
-  DateTime parse(String string) {
-    assert(_dateFormat != null);
-    return _dateFormat.parse(string);
-  }
-
-  TimeFormatFunction multi(List<List> formats) {
-    var n = formats.length,
-        i = -1;
-    while (++i < n)
-      formats[i][0] = _getInstance(formats[i][0] as String);
-    return (var date) {
-      if (date is num) {
-        date = new DateTime.fromMillisecondsSinceEpoch(date.toInt());
-      }
-      var i = 0,
-          f = formats[i];
-      while (f.length < 2 || f[1](date) == false) {
-        i++;
-        if (i < n) f = formats[i];
-      }
-      if (i == n) return null;
-      return f[0].apply(date);
-    };
-  }
-
-  UTCTimeFormat utc([String specifier = null]) {
-    return new UTCTimeFormat(specifier == null ?
-        _template : specifier, _locale);
-  }
-
-  static UTCTimeFormat iso() {
-    return new UTCTimeFormat("%Y-%m-%dT%H:%M:%S.%LZ");
-  }
-
-  static Map timeFormatPads = {"-": "", "_": " ", "0": "0"};
-  // TODO(songrenchu): Cannot fully be equivalent now.
-  static Map timeFormatsTransform = {
-    'a': 'EEE',
-    'A': 'EEEE',
-    'b': 'MMM',
-    'B': 'MMMM',
-    'c': 'EEE MMM d HH:mm:ss yyyy',
-    'd': 'dd',
-    'e': 'd',         // TODO(songrenchu): zero padding not supported
-    'H': 'HH',
-    'I': 'hh',
-    'j': 'DDD',
-    'm': 'MM',
-    'M': 'mm',
-    'L': 'SSS',
-    'p': 'a',
-    'S': 'ss',
-    'U': 'ww',        // TODO(songrenchu): ICU doesn't distinguish 'U' and 'W',
-                      // and not supported by Dart: DateFormat
-    'w': 'ee',        // TODO(songrenchu): e not supported by Dart: DateFormat
-    'W': 'ww',        // TODO(songrenchu): ICU doesn't distinguish 'U' and 'W',
-                      // and not supported by Dart: DateFormat
-    'x': 'MM/dd/yyyy',
-    'X': 'HH:mm:ss',
-    'y': 'yy',
-    'Y': 'yyyy',
-    'Z': 'Z',
-    '%': '%'
-  };
-
-  String _wrapStrptime2ICU(String template) {
-    var string = [],
-        i = -1,
-        j = 0,
-        n = template.length,
-        tempChar;
-    while (++i < n) {
-      if (template[i] == '%') {
-        string.add(template.substring(j, i));
-        if ((timeFormatPads[tempChar = template[++i]]) != null)
-          tempChar = template[++i];
-        if (timeFormatsTransform[tempChar] != null)
-          string.add(timeFormatsTransform[tempChar]);
-        j = i + 1;
-      }
-    }
-    if (j < i)
-      string.add("'" + template.substring(j, i) + "'");
-    return string.join("");
-  }
-}
-
-class UTCTimeFormat extends TimeFormat {
-  UTCTimeFormat(String template, [String identifier = 'en_US']):
-    super(template, identifier);
-
-  UTCTimeFormat _getInstance(String template) {
-    return new UTCTimeFormat(template, _locale);
-  }
-
-  DateTime parse(String string) {
-    assert(_dateFormat != null);
-    return _dateFormat.parseUTC(string);
-  }
-}