/// <summary>
/// Adds the specified class(es) to the element.
/// </summary>
/// <param name="element">Element.</param>
/// <param name="classNames">One or more classes to be added to the class attribute of the element.</param>
/// <returns>Element</returns>
public static HElement AddClass(this HElement element, IEnumerable <String> classNames)
{
if (element != null && classNames != null)
{
element.Attribute("class", String.Join(" ", element.GetClasses().Concat(classNames).Distinct(StringComparer.OrdinalIgnoreCase)));
}
return(element);
}
/// <summary>
/// Remove some class names to an element.
/// </summary>
/// <param name="element"></param>
/// <param name="className"></param>
/// <returns></returns>
public static HElement RemoveClass(this HElement element, String[] className)
{
if (element != null && className != null && className.Length > 0)
{
var classes = element.GetClasses();
element.Attribute("class", String.Join(" ", classes.Except(className, StringComparer.OrdinalIgnoreCase)));
}
return(element);
}
/// <summary>
/// Determine if the element is assigned the given class.
/// </summary>
/// <param name="element">Source element.</param>
/// <param name="className">The class name to search for.</param>
/// <returns>Returns true if the class is assigned.</returns>
public static bool HasClass(this HElement element, String className)
{
// If invalid argument then not found
if (element == null || string.IsNullOrWhiteSpace(className))
{
return(false);
}
var cls = element.GetClasses();
return(cls.Any(c => String.Equals(className, c, StringComparison.OrdinalIgnoreCase)));
}