/// <summary>
/// Adds one or more classes (separated by spaces) to the tag
/// </summary>
/// <param name="className">Valid CSS class name, JSON object, JSON array, or multiple valid CSS class names separated by spaces</param>
/// <returns>The tag for method chaining</returns>
/// <exception cref="System.ArgumentException">One or more CSS class names were invalid (contained invalid characters)</exception>
protected internal virtual void AddClass(string className)
{
var classes = ParseClassName(className);
foreach (var parsedClass in classes)
{
if (!CssClassNameValidator.IsValidClassName(parsedClass))
{
throw new ArgumentException(string.Format("CSS class names is not valid. Problem class was '{0}'", new object[] { className }), nameof(className));
}
_cssClasses.Add(parsedClass);
}
}
/// <summary>
/// Adds one or more classes (separated by spaces) to the tag
/// </summary>
/// <param name="className">Valid CSS class name, JSON object, JSON array, or multiple valid CSS class names separated by spaces</param>
/// <returns>The tag for method chaining</returns>
/// <exception cref="System.ArgumentException">One or more CSS class names were invalid (contained invalid characters)</exception>
public HtmlTag AddClass(string className)
{
IEnumerable <string> classes = parseClassName(className);
foreach (string parsedClass in classes)
{
if (!CssClassNameValidator.IsValidClassName(parsedClass))
{
throw new ArgumentException("CSS class names is not valid. Problem class was '{0}'".ToFormat(className), "className");
}
_cssClasses.Add(parsedClass);
}
return(this);
}
/// <summary>
/// Parses a string which contains class name or multiple class names.
/// </summary>
/// <param name="className">A string which contains class(-es)</param>
/// <returns>The list of classes</returns>
private static IEnumerable <string> parseClassName(string className)
{
IEnumerable <string> classes;
if (CssClassNameValidator.IsJsonClassName(className))
{
classes = new List <string> {
className
};
}
else
{
classes = Regex.Split(className, "[ ]+")
.Where(c => !String.IsNullOrWhiteSpace(c));
}
return(classes);
}
