static Boolean VaryStart <T>(this IValueConverter <T> converter, CssValueList list, Func <IValueConverter <T>, ICssValue, Boolean> validate)
{
var min = Math.Max(converter.MinArgs, 1);
var max = converter.MaxArgs;
var n = Math.Min(max, list.Length);
for (int count = n; count >= min; count--)
{
var subset = count > 1 ? list.Subset(0, count) : list[0];
if (validate(converter, subset))
{
list.RemoveRange(0, count);
return(true);
}
}
return(validate(converter, null));
}
static Boolean VaryAll <T>(this IValueConverter <T> converter, CssValueList list, Func <IValueConverter <T>, ICssValue, Boolean> validate)
{
var min = Math.Max(converter.MinArgs, 1);
var max = converter.MaxArgs;
for (int i = 0; i < list.Length; i++)
{
var n = Math.Min(Math.Min(max, list.Length) + i, list.Length);
for (int j = n; j >= i + min; j--)
{
var count = j - i;
var subset = count > 1 ? list.Subset(i, j) : list[i];
if (validate(converter, subset))
{
list.RemoveRange(i, count);
return(true);
}
}
}
return(validate(converter, null));
}