private static string ParseCssSize(string styleValue, ref int nextIndex, bool mustBeNonNegative)
{
ParseWhiteSpace(styleValue, ref nextIndex);
int startIndex = nextIndex;
// Parse optional minus sign
if (nextIndex < styleValue.Length && styleValue[nextIndex] == '-')
{
nextIndex++;
}
if (nextIndex < styleValue.Length && Char.IsDigit(styleValue[nextIndex]))
{
while (nextIndex < styleValue.Length && (Char.IsDigit(styleValue[nextIndex]) || styleValue[nextIndex] == '.'))
{
nextIndex++;
}
string number = styleValue.Substring(startIndex, nextIndex - startIndex);
string unit = ParseWordEnumeration(_fontSizeUnits, styleValue, ref nextIndex);
if (unit == null)
{
unit = "px"; // Assuming pixels by default
}
if (mustBeNonNegative && styleValue[startIndex] == '-')
{
return "0";
}
else
{
double val;
if (HtmlToXamlConverter.TryGetLengthValue(number + unit, out val))
{
return val.ToString();
}
else
{
return "0";
}
}
}
return null;
}