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intl/lib/src/intl/date_format_field.dart

Index: intl/lib/src/intl/date_format_field.dart
diff --git a/intl/lib/src/intl/date_format_field.dart b/intl/lib/src/intl/date_format_field.dart
deleted file mode 100644
index 8df11542920e771511d36787c058921cf028d487..0000000000000000000000000000000000000000
--- a/intl/lib/src/intl/date_format_field.dart
+++ /dev/null
@@ -1,660 +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.
-
-part of intl;
-
-/**
- * This is a private class internal to DateFormat which is used for formatting
- * particular fields in a template. e.g. if the format is hh:mm:ss then the
- * fields would be "hh", ":", "mm", ":", and "ss". Each type of field knows
- * how to format that portion of a date.
- */
-abstract class _DateFormatField {
-  /** The format string that defines us, e.g. "hh" */
-  String pattern;
-
-  /** The DateFormat that we are part of.*/
-  DateFormat parent;
-
-  _DateFormatField(this.pattern, this.parent);
-
-  /**
-   * Return the width of [pattern]. Different widths represent different
-   * formatting options. See the comment for DateFormat for details.
-   */
-  int get width => pattern.length;
-
-  String fullPattern() => pattern;
-
-  String toString() => pattern;
-
-  /** Format date according to our specification and return the result. */
-  String format(DateTime date) {
-    // Default implementation in the superclass, works for both types of
-    // literal patterns, and is overridden by _DateFormatPatternField.
-    return pattern;
-  }
-
-  /** Abstract method for subclasses to implementing parsing for their format.*/
-  void parse(_Stream input, _DateBuilder dateFields);
-
-  /**
-   * Abstract method for subclasses to implementing 'loose' parsing for
-   * their format, accepting input case-insensitively, and allowing some
-   * delimiters to be skipped.
-   */
-  void parseLoose(_Stream input, _DateBuilder dateFields);
-
-  /** Parse a literal field. We just look for the exact input. */
-  void parseLiteral(_Stream input) {
-    var found = input.read(width);
-    if (found != pattern) {
-      throwFormatException(input);
-    }
-  }
-
-  /**
-   * Parse a literal field. We accept either an exact match, or an arbitrary
-   * amount of whitespace.
-   */
-  void parseLiteralLoose(_Stream input) {
-    var found = input.peek(width);
-    if (found == pattern) {
-      input.read(width);
-    }
-    while (!input.atEnd() && input.peek().trim().isEmpty) {
-      input.read();
-    }
-  }
-
-  /** Throw a format exception with an error message indicating the position.*/
-  void throwFormatException(_Stream stream) {
-    throw new FormatException("Trying to read $this from ${stream.contents} "
-        "at position ${stream.index}");
-  }
-}
-
-/**
- * Represents a literal field - a sequence of characters that doesn't
- * change according to the date's data. As such, the implementation
- * is extremely simple.
- */
-class _DateFormatLiteralField extends _DateFormatField {
-  _DateFormatLiteralField(pattern, parent) : super(pattern, parent);
-
-  parse(_Stream input, _DateBuilder dateFields) {
-    parseLiteral(input);
-  }
-
-  parseLoose(_Stream input, _DateBuilder dateFields) =>
-      parseLiteralLoose(input);
-}
-
-/**
- * Represents a literal field with quoted characters in it. This is
- * only slightly more complex than a _DateFormatLiteralField.
- */
-class _DateFormatQuotedField extends _DateFormatField {
-  String _fullPattern;
-
-  String fullPattern() => _fullPattern;
-
-  _DateFormatQuotedField(pattern, parent) : super(pattern, parent) {
-    _fullPattern = pattern;
-    patchQuotes();
-  }
-
-  parse(_Stream input, _DateBuilder dateFields) {
-    parseLiteral(input);
-  }
-
-  parseLoose(_Stream input, _DateBuilder dateFields) =>
-      parseLiteralLoose(input);
-
-  void patchQuotes() {
-    if (pattern == "''") {
-      pattern = "'";
-    } else {
-      pattern = pattern.substring(1, pattern.length - 1);
-      var twoEscapedQuotes = new RegExp(r"''");
-      pattern = pattern.replaceAll(twoEscapedQuotes, "'");
-    }
-  }
-}
-
-/**
- * A field that parses "loosely", meaning that we'll accept input that is
- * missing delimiters, has upper/lower case mixed up, and might not strictly
- * conform to the pattern, e.g. the pattern calls for Sep we might accept
- * sep, september, sEPTember. Doesn't affect numeric fields.
- */
-class _LoosePatternField extends _DateFormatPatternField {
-  _LoosePatternField(String pattern, parent) : super(pattern, parent);
-
-  /**
-    * Parse from a list of possibilities, but case-insensitively.
-    * Assumes that input is lower case.
-    */
-  int parseEnumeratedString(_Stream input, List possibilities) {
-    var lowercasePossibilities =
-        possibilities.map((x) => x.toLowerCase()).toList();
-    try {
-      return super.parseEnumeratedString(input, lowercasePossibilities);
-    } on FormatException {
-      return -1;
-    }
-  }
-
-  /**
-   * Parse a month name, case-insensitively, and set it in [dateFields].
-   * Assumes that [input] is lower case.
-   */
-  void parseMonth(input, dateFields) {
-    if (width <= 2) {
-      handleNumericField(input, dateFields.setMonth);
-      return;
-    }
-    var possibilities = [symbols.MONTHS, symbols.SHORTMONTHS];
-    for (var monthNames in possibilities) {
-      var month = parseEnumeratedString(input, monthNames);
-      if (month != -1) {
-        dateFields.month = month + 1;
-        return;
-      }
-    }
-  }
-
-  /**
-   * Parse a standalone day name, case-insensitively.
-   * Assumes that input is lower case. Doesn't do anything
-   */
-  void parseStandaloneDay(input) {
-    // This is ignored, but we still have to skip over it the correct amount.
-    if (width <= 2) {
-      handleNumericField(input, (x) => x);
-      return;
-    }
-    var possibilities = [
-      symbols.STANDALONEWEEKDAYS,
-      symbols.STANDALONESHORTWEEKDAYS
-    ];
-    for (var dayNames in possibilities) {
-      var day = parseEnumeratedString(input, dayNames);
-      if (day != -1) {
-        return;
-      }
-    }
-  }
-
-  /**
-   * Parse a standalone month name, case-insensitively.
-   * Assumes that input is lower case. Doesn't do anything
-   */
-  void parseStandaloneMonth(input, dateFields) {
-    if (width <= 2) {
-      handleNumericField(input, (x) => x);
-      return;
-    }
-    var possibilities = [
-      symbols.STANDALONEMONTHS,
-      symbols.STANDALONESHORTMONTHS
-    ];
-    for (var monthNames in possibilities) {
-      var month = parseEnumeratedString(input, monthNames);
-      if (month != -1) {
-        dateFields.month = month + 1;
-        return;
-      }
-    }
-  }
-
-  /**
-   * Parse a day of the week name, case-insensitively.
-   * Assumes that input is lower case. Doesn't do anything
-   */
-  void parseDayOfWeek(_Stream input) {
-    // This is IGNORED, but we still have to skip over it the correct amount.
-    if (width <= 2) {
-      handleNumericField(input, (x) => x);
-      return;
-    }
-    var possibilities = [symbols.WEEKDAYS, symbols.SHORTWEEKDAYS];
-    for (var dayNames in possibilities) {
-      var day = parseEnumeratedString(input, dayNames);
-      if (day != -1) {
-        return;
-      }
-    }
-  }
-}
-
-/*
- * Represents a field in the pattern that formats some aspect of the
- * date. Consists primarily of a switch on the particular pattern characters
- * to determine what to do.
- */
-class _DateFormatPatternField extends _DateFormatField {
-  _DateFormatPatternField(pattern, parent) : super(pattern, parent);
-
-  /** Format date according to our specification and return the result. */
-  String format(DateTime date) {
-    return formatField(date);
-  }
-
-  /**
-   * Parse the date according to our specification and put the result
-   * into the correct place in dateFields.
-   */
-  void parse(_Stream input, _DateBuilder dateFields) {
-    parseField(input, dateFields);
-  }
-
-  /**
-   * Parse the date according to our specification and put the result
-   * into the correct place in dateFields. Allow looser parsing, accepting
-   * case-insensitive input and skipped delimiters.
-   */
-  void parseLoose(_Stream input, _DateBuilder dateFields) {
-    new _LoosePatternField(pattern, parent).parse(input, dateFields);
-  }
-
-  /**
-   * Parse a field representing part of a date pattern. Note that we do not
-   * return a value, but rather build up the result in [builder].
-   */
-  void parseField(_Stream input, _DateBuilder builder) {
-    try {
-      switch (pattern[0]) {
-        case 'a':
-          parseAmPm(input, builder);
-          break;
-        case 'c':
-          parseStandaloneDay(input);
-          break;
-        case 'd':
-          handleNumericField(input, builder.setDay);
-          break; // day
-        // Day of year. Setting month=January with any day of the year works
-        case 'D':
-          handleNumericField(input, builder.setDay);
-          break; // dayofyear
-        case 'E':
-          parseDayOfWeek(input);
-          break;
-        case 'G':
-          break; // era
-        case 'h':
-          parse1To12Hours(input, builder);
-          break;
-        case 'H':
-          handleNumericField(input, builder.setHour);
-          break; // hour 0-23
-        case 'K':
-          handleNumericField(input, builder.setHour);
-          break; //hour 0-11
-        case 'k':
-          handleNumericField(input, builder.setHour, -1);
-          break; //hr 1-24
-        case 'L':
-          parseStandaloneMonth(input, builder);
-          break;
-        case 'M':
-          parseMonth(input, builder);
-          break;
-        case 'm':
-          handleNumericField(input, builder.setMinute);
-          break; // minutes
-        case 'Q':
-          break; // quarter
-        case 'S':
-          handleNumericField(input, builder.setFractionalSecond);
-          break;
-        case 's':
-          handleNumericField(input, builder.setSecond);
-          break;
-        case 'v':
-          break; // time zone id
-        case 'y':
-          handleNumericField(input, builder.setYear);
-          break;
-        case 'z':
-          break; // time zone
-        case 'Z':
-          break; // time zone RFC
-        default:
-          return;
-      }
-    } catch (e) {
-      throwFormatException(input);
-    }
-  }
-
-  /** Formatting logic if we are of type FIELD */
-  String formatField(DateTime date) {
-    switch (pattern[0]) {
-      case 'a':
-        return formatAmPm(date);
-      case 'c':
-        return formatStandaloneDay(date);
-      case 'd':
-        return formatDayOfMonth(date);
-      case 'D':
-        return formatDayOfYear(date);
-      case 'E':
-        return formatDayOfWeek(date);
-      case 'G':
-        return formatEra(date);
-      case 'h':
-        return format1To12Hours(date);
-      case 'H':
-        return format0To23Hours(date);
-      case 'K':
-        return format0To11Hours(date);
-      case 'k':
-        return format24Hours(date);
-      case 'L':
-        return formatStandaloneMonth(date);
-      case 'M':
-        return formatMonth(date);
-      case 'm':
-        return formatMinutes(date);
-      case 'Q':
-        return formatQuarter(date);
-      case 'S':
-        return formatFractionalSeconds(date);
-      case 's':
-        return formatSeconds(date);
-      case 'v':
-        return formatTimeZoneId(date);
-      case 'y':
-        return formatYear(date);
-      case 'z':
-        return formatTimeZone(date);
-      case 'Z':
-        return formatTimeZoneRFC(date);
-      default:
-        return '';
-    }
-  }
-
-  /** Return the symbols for our current locale. */
-  DateSymbols get symbols => dateTimeSymbols[parent.locale];
-
-  formatEra(DateTime date) {
-    var era = date.year > 0 ? 1 : 0;
-    return width >= 4 ? symbols.ERANAMES[era] : symbols.ERAS[era];
-  }
-
-  formatYear(DateTime date) {
-    // TODO(alanknight): Proper handling of years <= 0
-    var year = date.year;
-    if (year < 0) {
-      year = -year;
-    }
-    return width == 2 ? padTo(2, year % 100) : padTo(width, year);
-  }
-
-  /**
-   * We are given [input] as a stream from which we want to read a date. We
-   * can't dynamically build up a date, so we are given a list [dateFields] of
-   * the constructor arguments and an [position] at which to set it
-   * (year,month,day,hour,minute,second,fractionalSecond)
-   * then after all parsing is done we construct a date from the arguments.
-   * This method handles reading any of the numeric fields. The [offset]
-   * argument allows us to compensate for zero-based versus one-based values.
-   */
-  void handleNumericField(_Stream input, Function setter, [int offset = 0]) {
-    var result = input.nextInteger();
-    if (result == null) throwFormatException(input);
-    setter(result + offset);
-  }
-
-  /**
-   * We are given [input] as a stream from which we want to read a date. We
-   * can't dynamically build up a date, so we are given a list [dateFields] of
-   * the constructor arguments and an [position] at which to set it
-   * (year,month,day,hour,minute,second,fractionalSecond)
-   * then after all parsing is done we construct a date from the arguments.
-   * This method handles reading any of string fields from an enumerated set.
-   */
-  int parseEnumeratedString(_Stream input, List possibilities) {
-    var results = new _Stream(possibilities)
-        .findIndexes((each) => input.peek(each.length) == each);
-    if (results.isEmpty) throwFormatException(input);
-    results.sort(
-        (a, b) => possibilities[a].length.compareTo(possibilities[b].length));
-    var longestResult = results.last;
-    input.read(possibilities[longestResult].length);
-    return longestResult;
-  }
-
-  String formatMonth(DateTime date) {
-    switch (width) {
-      case 5:
-        return symbols.NARROWMONTHS[date.month - 1];
-      case 4:
-        return symbols.MONTHS[date.month - 1];
-      case 3:
-        return symbols.SHORTMONTHS[date.month - 1];
-      default:
-        return padTo(width, date.month);
-    }
-  }
-
-  void parseMonth(input, dateFields) {
-    var possibilities;
-    switch (width) {
-      case 5:
-        possibilities = symbols.NARROWMONTHS;
-        break;
-      case 4:
-        possibilities = symbols.MONTHS;
-        break;
-      case 3:
-        possibilities = symbols.SHORTMONTHS;
-        break;
-      default:
-        return handleNumericField(input, dateFields.setMonth);
-    }
-    dateFields.month = parseEnumeratedString(input, possibilities) + 1;
-  }
-
-  String format24Hours(DateTime date) {
-    return padTo(width, date.hour);
-  }
-
-  String formatFractionalSeconds(DateTime date) {
-    // Always print at least 3 digits. If the width is greater, append 0s
-    var basic = padTo(3, date.millisecond);
-    if (width - 3 > 0) {
-      var extra = padTo(width - 3, 0);
-      return basic + extra;
-    } else {
-      return basic;
-    }
-  }
-
-  String formatAmPm(DateTime date) {
-    var hours = date.hour;
-    var index = (date.hour >= 12) && (date.hour < 24) ? 1 : 0;
-    var ampm = symbols.AMPMS;
-    return ampm[index];
-  }
-
-  void parseAmPm(input, dateFields) {
-    // If we see a "PM" note it in an extra field.
-    var ampm = parseEnumeratedString(input, symbols.AMPMS);
-    if (ampm == 1) dateFields.pm = true;
-  }
-
-  String format1To12Hours(DateTime date) {
-    var hours = date.hour;
-    if (date.hour > 12) hours = hours - 12;
-    if (hours == 0) hours = 12;
-    return padTo(width, hours);
-  }
-
-  void parse1To12Hours(_Stream input, _DateBuilder dateFields) {
-    handleNumericField(input, dateFields.setHour);
-    if (dateFields.hour == 12) dateFields.hour = 0;
-  }
-
-  String format0To11Hours(DateTime date) {
-    return padTo(width, date.hour % 12);
-  }
-
-  String format0To23Hours(DateTime date) {
-    return padTo(width, date.hour);
-  }
-
-  String formatStandaloneDay(DateTime date) {
-    switch (width) {
-      case 5:
-        return symbols.STANDALONENARROWWEEKDAYS[date.weekday % 7];
-      case 4:
-        return symbols.STANDALONEWEEKDAYS[date.weekday % 7];
-      case 3:
-        return symbols.STANDALONESHORTWEEKDAYS[date.weekday % 7];
-      default:
-        return padTo(1, date.day);
-    }
-  }
-
-  void parseStandaloneDay(_Stream input) {
-    // This is ignored, but we still have to skip over it the correct amount.
-    var possibilities;
-    switch (width) {
-      case 5:
-        possibilities = symbols.STANDALONENARROWWEEKDAYS;
-        break;
-      case 4:
-        possibilities = symbols.STANDALONEWEEKDAYS;
-        break;
-      case 3:
-        possibilities = symbols.STANDALONESHORTWEEKDAYS;
-        break;
-      default:
-        return handleNumericField(input, (x) => x);
-    }
-    parseEnumeratedString(input, possibilities);
-  }
-
-  String formatStandaloneMonth(DateTime date) {
-    switch (width) {
-      case 5:
-        return symbols.STANDALONENARROWMONTHS[date.month - 1];
-      case 4:
-        return symbols.STANDALONEMONTHS[date.month - 1];
-      case 3:
-        return symbols.STANDALONESHORTMONTHS[date.month - 1];
-      default:
-        return padTo(width, date.month);
-    }
-  }
-
-  void parseStandaloneMonth(input, dateFields) {
-    var possibilities;
-    switch (width) {
-      case 5:
-        possibilities = symbols.STANDALONENARROWMONTHS;
-        break;
-      case 4:
-        possibilities = symbols.STANDALONEMONTHS;
-        break;
-      case 3:
-        possibilities = symbols.STANDALONESHORTMONTHS;
-        break;
-      default:
-        return handleNumericField(input, dateFields.setMonth);
-    }
-    dateFields.month = parseEnumeratedString(input, possibilities) + 1;
-  }
-
-  String formatQuarter(DateTime date) {
-    var quarter = ((date.month - 1) / 3).truncate();
-    if (width < 4) {
-      return symbols.SHORTQUARTERS[quarter];
-    } else {
-      return symbols.QUARTERS[quarter];
-    }
-  }
-  String formatDayOfMonth(DateTime date) {
-    return padTo(width, date.day);
-  }
-
-  String formatDayOfYear(DateTime date) => padTo(width, dayNumberInYear(date));
-
-  /** Return the ordinal day, i.e. the day number in the year. */
-  int dayNumberInYear(DateTime date) {
-    if (date.month == 1) return date.day;
-    if (date.month == 2) return date.day + 31;
-    return ordinalDayFromMarchFirst(date) + 59 + (isLeapYear(date) ? 1 : 0);
-  }
-
-  /**
-   * Return the day of the year counting March 1st as 1, after which the
-   * number of days per month is constant, so it's easier to calculate.
-   * Formula from http://en.wikipedia.org/wiki/Ordinal_date
-   */
-  int ordinalDayFromMarchFirst(DateTime date) =>
-      ((30.6 * date.month) - 91.4).floor() + date.day;
-
-  /**
-   * Return true if this is a leap year. Rely on [DateTime] to do the
-   * underlying calculation, even though it doesn't expose the test to us.
-   */
-  bool isLeapYear(DateTime date) {
-    var feb29 = new DateTime(date.year, 2, 29);
-    return feb29.month == 2;
-  }
-
-  String formatDayOfWeek(DateTime date) {
-    // Note that Dart's weekday returns 1 for Monday and 7 for Sunday.
-    return (width >= 4
-        ? symbols.WEEKDAYS
-        : symbols.SHORTWEEKDAYS)[(date.weekday) % 7];
-  }
-
-  void parseDayOfWeek(_Stream input) {
-    // This is IGNORED, but we still have to skip over it the correct amount.
-    var possibilities = width >= 4 ? symbols.WEEKDAYS : symbols.SHORTWEEKDAYS;
-    parseEnumeratedString(input, possibilities);
-  }
-
-  String formatMinutes(DateTime date) {
-    return padTo(width, date.minute);
-  }
-
-  String formatSeconds(DateTime date) {
-    return padTo(width, date.second);
-  }
-
-  String formatTimeZoneId(DateTime date) {
-    // TODO(alanknight): implement time zone support
-    throw new UnimplementedError();
-  }
-
-  String formatTimeZone(DateTime date) {
-    throw new UnimplementedError();
-  }
-
-  String formatTimeZoneRFC(DateTime date) {
-    throw new UnimplementedError();
-  }
-
-  /**
-  * Return a string representation of the object padded to the left with
-  * zeros. Primarily useful for numbers.
-  */
-  String padTo(int width, Object toBePrinted) {
-    var basicString = toBePrinted.toString();
-    if (basicString.length >= width) return basicString;
-    var buffer = new StringBuffer();
-    for (var i = 0; i < width - basicString.length; i++) {
-      buffer.write('0');
-    }
-    buffer.write(basicString);
-    return buffer.toString();
-  }
-}