public TimeContext Apply(TextBox textBox, TimeFormatSpecifier[] formatSpecifiers, out int start, out int length)
{
// No value or no text selected then prevent increment
if (string.IsNullOrWhiteSpace(textBox.SelectedText))
{
start = -1;
length = -1;
return(null);
}
string text = textBox.SelectedText.TrimEnd();
if (!Regex.IsMatch(text, "^[0-9]*$"))
{
start = -1;
length = -1;
return(null);
}
start = textBox.SelectionStart;
length = text.Length;
int numberOfPreviousNumbers = 0;
for (int i = 0; i < textBox.Text.Length; i++)
{
if (i == start) // Found start index
{
break;
}
if (char.IsDigit(textBox.Text[i]))
{
continue;
}
numberOfPreviousNumbers++; // Must have encountered as seperator. Inc
}
TimeFormatSpecifier formatSpecifier = formatSpecifiers
.FirstOrDefault(x => x.Index == numberOfPreviousNumbers);
TimeContext dateTimeContext = new TimeContext(formatSpecifier);
return(dateTimeContext);
}
public IEnumerable <TimeFormatSpecifier> CalculateTimeFormatSpecifiers(string formatString)
{
// The user has specified a custom string
if (string.IsNullOrWhiteSpace(formatString))
{
return(null);
}
if (!ValidStringFormat(formatString))
{
return(null);
}
/*
* Validated a valid DateTime Format from the user.
* Calculate the positions of each data type.
*/
ITimeFormatSpecifierFactory factory = new TimeFormatSpecifierFactory();
int index = 0;
string[] specifiers = formatString.Split(FormatStringSeperators.Seperators);
IList <TimeFormatSpecifier> formatSpecifiers = new List <TimeFormatSpecifier>();
foreach (string specifier in specifiers)
{
string s = specifier;
if (!(s.Equals("HH") || s.Equals("mm") || s.Equals("ss")))
{
continue;
}
TimeFormatSpecifier formatSpecifier = factory.CreateFormatSpecifier(specifier, index);
formatSpecifiers.Add(formatSpecifier);
index++;
}
return(formatSpecifiers);
}
public TimeContext(TimeFormatSpecifier timeFormatSpecifier)
{
_formatSpecifier = timeFormatSpecifier;
}
