protected override void InitInternal(ICollection <string> locales, DateTimeFormatOptions options)
{
Hashtable ht = new Hashtable();
LocaleMatcher matcher = options.LocaleMatcher;
ht["ca"] = options.Calendar;
ht["nu"] = options.NumberingSystem;
bool? hour12 = options.Hour12;
HourCycle hourCycle = options.HourCycle;
if (hour12 != default)
{
hourCycle = HourCycle.Unspecified;
}
ht["hc"] = IntlProviderOptions.ToStringValue(hourCycle);
this.Locale = ResolveLocale(locales, matcher, relevantExtensionKeys, ht, out ht);
this.Calendar = (string)ht["ca"];
this.NumberingSystem = (string)ht["nu"];
string tz = options.TimeZone;
if (tz != null)
{
if (!IntlUtility.IsValidTimeZoneName(tz))
{
throw new EcmaRangeErrorException("Invalid time zone specified: {0}", tz);
}
this.TimeZone = IntlUtility.CanonicalizeTimeZoneName(tz);
}
else
{
this.TimeZone = IntlContext.DefaultTimeZone;
}
this.FormatMatcher = options.FormatMatcher;
DateTimePartStyles styles = new DateTimePartStyles(options);
HourCycle finalHourCycle = IntlProviderOptions.ParseEnum <HourCycle>((string)ht["hc"]);
this.HourCycle = hour12 == default ? finalHourCycle : NormalizeHourCycle(finalHourCycle, hour12.Value);
this.Hour12 = this.HourCycle == HourCycle.Hour11 || this.HourCycle == HourCycle.Hour12;
this.format = GetBestFormat(styles);
this.calendar = IntlUtility.SupportedCalendars[this.Calendar];
this.DateTimePartStyles = format.Styles;
this.BoundFormat = Literal.FunctionLiteral(this.FormatInternal);
}
private CldrDateTimeFormat GetBestFormat(DateTimePartStyles options)
{
string locale = IntlUtility.RemoveUnicodeExtensions(this.Locale);
ReadOnlyCollection <CldrDateTimeFormat> formats;
if (options.IsDateOnly)
{
formats = CldrCalendarInfo.Resolve(locale, this.Calendar).GetAvailableDateFormats();
}
else if (options.IsTimeOnly)
{
formats = CldrCalendarInfo.Resolve(locale, "generic").GetAvailableTimeFormats();
}
else
{
formats = CldrCalendarInfo.Resolve(locale, this.Calendar).GetAvailableDateTimeFormats();
}
bool isDateOnly = options.IsDateOnly;
bool isHour12 = this.Hour12;
int bestScore = Int32.MinValue;
CldrDateTimeFormat bestFormat = null;
foreach (CldrDateTimeFormat format in formats)
{
if (isDateOnly || isHour12 == format.Styles.IsHour12)
{
int score = format.Styles.Match(options);
if (score > bestScore)
{
bestScore = score;
bestFormat = format;
}
}
}
return(bestFormat);
}
