/// <summary>
/// Parse a complex font family css property to check if it contains multiple fonts and if the font exists.<br/>
/// returns the font family name to use or 'inherit' if failed.
/// </summary>
/// <param name="propValue">the value of the property to parse</param>
/// <returns>parsed font-family value</returns>
private static string ParseFontFamilyProperty(string propValue)
{
int start = 0;
while (start > -1 && start < propValue.Length)
{
while (char.IsWhiteSpace(propValue[start]) || propValue[start] == ',' || propValue[start] == '\'' || propValue[start] == '"')
{
start++;
}
var end = propValue.IndexOf(',', start);
if (end < 0)
{
end = propValue.Length;
}
var adjEnd = end - 1;
while (char.IsWhiteSpace(propValue[adjEnd]) || propValue[adjEnd] == '\'' || propValue[adjEnd] == '"')
{
adjEnd--;
}
var font = propValue.Substring(start, adjEnd - start + 1);
if (font.Equals("monospace", StringComparison.InvariantCultureIgnoreCase))
{
font = "Courier New";
}
if (CssUtils.IsFontExists(font))
{
return(font);
}
start = end;
}
return(CssConstants.Inherit);
}
