public FormattedString FormatRange(EcmaValue startDate, EcmaValue endDate, out string[] annotations)
{
EnsureInitialized();
if (startDate == default || endDate == default)
{
throw new EcmaTypeErrorException("Invalid time value");
}
EcmaValue x = startDate.ToNumber();
EcmaValue y = endDate.ToNumber();
if (x > y)
{
throw new EcmaRangeErrorException("Invalid time value");
}
if (x < MinTime || x > MaxTime)
{
throw new EcmaRangeErrorException("Invalid time value");
}
if (y < MinTime || y > MaxTime)
{
throw new EcmaRangeErrorException("Invalid time value");
}
TimeZoneInfo timezone = TZConvert.GetTimeZoneInfo(this.TimeZone);
DateTime dt1 = unixEpochUtc.AddMilliseconds(x.ToInt64() + timezone.BaseUtcOffset.TotalMilliseconds);
DateTime dt2 = unixEpochUtc.AddMilliseconds(y.ToInt64() + timezone.BaseUtcOffset.TotalMilliseconds);
bool dateFieldsPracticallyEqual = true;
bool patternContainsLargerDateField = false;
FormattedString pattern = null;
foreach (FormattedPartType part in new[] { FormattedPartType.Era, FormattedPartType.Year, FormattedPartType.Month, FormattedPartType.Day, FormattedPartType.DayPeriod, FormattedPartType.Hour, FormattedPartType.Minute, FormattedPartType.Second })
{
int v1 = GetPartValue(part, dt1);
int v2 = GetPartValue(part, dt2);
if (v1 != v2)
{
dateFieldsPracticallyEqual = false;
}
FormattedString rp = format.GetRangePattern(part);
if (pattern != null && rp == null)
{
patternContainsLargerDateField = true;
}
pattern = rp ?? pattern;
if (!dateFieldsPracticallyEqual || patternContainsLargerDateField)
{
break;
}
}
if (dateFieldsPracticallyEqual)
{
FormattedString str = FormatDateTime(dt1, format.Pattern);
annotations = Enumerable.Range(0, str.PartCount).Select(v => "shared").ToArray();
return(str);
}
if (pattern == null)
{
pattern = format.GetDefaultRangePattern();
}
List <FormattedPart> parts = new List <FormattedPart>(pattern);
List <string> sources = new List <string>();
for (int i = parts.Count - 1; i >= 0; i--)
{
FormattedString placeable = null;
string source = null;
switch (parts[i].Type)
{
case FormattedPartType.SharedPlaceholder:
placeable = FormatDateTime(dt1, parts[i].Value);
source = "shared";
break;
case FormattedPartType.StartRangePlaceholder:
placeable = FormatDateTime(dt1, parts[i].Value);
source = "startRange";
break;
case FormattedPartType.EndRangePlaceholder:
placeable = FormatDateTime(dt2, parts[i].Value);
source = "endRange";
break;
case FormattedPartType.Placeholder:
bool isStartRange = parts[i].Value == "{0}";
placeable = FormatDateTime(isStartRange ? dt1 : dt2, format.Pattern);
source = isStartRange ? "startRange" : "endRange";
break;
default:
sources.Insert(0, "shared");
break;
}
if (placeable != null)
{
parts.RemoveAt(i);
parts.InsertRange(i, placeable);
sources.InsertRange(0, Enumerable.Range(0, placeable.PartCount).Select(_ => source));
}
}
annotations = sources.ToArray();
return(new FormattedString(parts));
}
