private void UpdateCalendars(Windows.Globalization.Calendar calendar, DateTime oldMaxValue, DateTime oldMinValue)
{
this.currentCalendar = calendar.Clone();
this.maxCalendar = calendar.Clone();
this.minCalendar = calendar.Clone();
this.maxCalendar.SetToMax();
this.minCalendar.SetToMin();
this.maxSupportedCalendarValue = this.maxCalendar.GetUtcDateTime();
this.minSupportedCalendarValue = this.minCalendar.GetUtcDateTime();
if (oldMaxValue < this.maxSupportedCalendarValue)
{
this.maxCalendar.SetDateTime(oldMaxValue);
}
if (oldMinValue > this.minSupportedCalendarValue)
{
this.minCalendar.SetDateTime(oldMinValue);
}
this.minCalendarWithStep = this.minCalendar.Clone();
this.maxCalendarWithStep = this.maxCalendar.Clone();
this.UpdateValuesWithStep();
}
internal CalendarValidator(Windows.Globalization.Calendar calendar)
{
this.Step = new DateTimeOffset(1, 1, 1, 1, 1, 1, new TimeSpan(0));
this.Calendar = calendar.Clone();
this.Calendar.ChangeTimeZone("UTC");
this.Initialize();
}
private bool FindValidHour(Windows.Globalization.Calendar calendar, int hourStep, int minuteStep, bool isMinDate, bool isMaxDate)
{
var clock = calendar.GetClock();
var minHour = isMinDate && calendar.Period == this.minCalendarWithStep.Period ? this.minCalendarWithStep.ZeroBasedHour() : DateTimeHelper.GetZeroBasedHour(clock, calendar.FirstHourInThisPeriod);
var maxHour = isMaxDate && calendar.Period == this.maxCalendarWithStep.Period ? this.maxCalendarWithStep.ZeroBasedHour() : DateTimeHelper.GetZeroBasedHour(clock, calendar.LastHourInThisPeriod);
var firstHour = DateTimeHelper.GetZeroBasedHour(clock, calendar.FirstHourInThisPeriod);
var currentHour = calendar.ZeroBasedHour();
var hourRemainder = this.GetStepRemainderForComponent(currentHour, firstHour, StepBehavior.StartFromBase, hourStep);
currentHour -= hourRemainder;
if (currentHour < minHour)
{
currentHour += hourStep;
if (currentHour > maxHour)
{
return(false);
}
}
// keep the start calendar
var startCalendar = calendar.Clone();
startCalendar.SetZeroBasedHour(currentHour);
while (currentHour >= minHour)
{
var hoursUpdate = currentHour - calendar.ZeroBasedHour();
calendar.AddHours(hoursUpdate);
if (hoursUpdate < 0)
{
calendar.Minute = calendar.LastMinuteInThisHour;
}
if (this.FindValidMinute(calendar, minuteStep, isMinDate, isMaxDate))
{
return(true);
}
currentHour -= hourStep;
}
calendar = startCalendar.Clone();
currentHour = calendar.Hour;
while (currentHour <= maxHour)
{
var hoursUpdate = currentHour - calendar.ZeroBasedHour();
calendar.AddHours(hoursUpdate);
if (hoursUpdate > 0)
{
calendar.Minute = calendar.FirstMinuteInThisHour;
}
if (this.FindValidMinute(calendar, minuteStep, isMinDate, isMaxDate))
{
return(true);
}
currentHour += hourStep;
}
return(false);
}
private bool FindValidMonth(Windows.Globalization.Calendar calendar, int monthStep, int dayStep)
{
var minMonth = calendar.Year == this.minCalendarWithStep.Year ? this.minCalendarWithStep.Month : calendar.FirstMonthInThisYear;
var maxMonth = calendar.Year == this.maxCalendarWithStep.Year ? this.maxCalendarWithStep.Month : calendar.LastMonthInThisYear;
var monthRemainder = this.GetStepRemainderForComponent(calendar.Month, calendar.FirstMonthInThisYear, this.MonthStepBehavior, monthStep);
var currentMonth = calendar.Month - monthRemainder;
while (currentMonth < minMonth)
{
currentMonth += monthStep;
if (currentMonth > maxMonth)
{
return(false);
}
}
// keep the start calendar
var startCalendar = calendar.Clone();
startCalendar.AddMonths(currentMonth - startCalendar.Month);
while (currentMonth >= minMonth)
{
var monthsUpdate = currentMonth - calendar.Month;
calendar.AddMonths(monthsUpdate);
if (monthsUpdate < 0)
{
calendar.Day = calendar.LastDayInThisMonth;
}
if (this.FindValidDay(calendar, dayStep))
{
return(true);
}
currentMonth -= monthStep;
}
calendar = startCalendar.Clone();
currentMonth = calendar.Month;
while (currentMonth <= maxMonth)
{
var monthsUpdate = currentMonth - calendar.Month;
calendar.AddMonths(monthsUpdate);
if (monthsUpdate > 0)
{
calendar.Day = calendar.FirstDayInThisMonth;
}
if (this.FindValidDay(calendar, dayStep))
{
return(true);
}
currentMonth += monthStep;
}
return(false);
}