/// <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>
/// Indicates if an element contains a data value
/// </summary>
public static bool HasData(this HElement element, String key)
{
if (element == null || String.IsNullOrWhiteSpace(key))
{
return(false);
}
return(element.Attribute(MakeDataKey(key)) != null);
}
/// <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>
/// Extract classes from an element
/// </summary>
public static String[] GetClasses(this HElement element)
{
HAttribute clsAttr = element != null?element.Attribute("class") : null;
if (clsAttr == null || clsAttr.Value == null)
{
return(new String[0]);
}
return(ExtractClassNames(clsAttr.Value));
}
/// <summary>
/// Get the value of the attribute of the element.
/// </summary>
public static String Attr(this HElement element, String name)
{
if (element != null && !String.IsNullOrWhiteSpace(name))
{
var attr = element.Attribute(name);
if (attr != null)
{
return(attr.Value);
}
}
return(null);
}
/// <summary>
/// Remove all classes to an element.
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
public static HElement RemoveClass(this HElement element)
{
if (element != null)
{
var attr = element.Attribute("class");
if (attr != null)
{
attr.Remove();
}
}
return(element);
}
/// <summary>
/// Remove attributes from the element
/// </summary>
public static HElement RemoveAttr(this HElement element, params String[] attributes)
{
if (element != null && attributes != null)
{
foreach (var attrName in attributes)
{
var attr = element.Attribute(attrName);
if (attr != null)
{
attr.Remove();
}
}
}
return(element);
}
/// <summary>
/// Set one attribute for the element.
/// </summary>
/// <param name="element">Element.</param>
/// <param name="name">Attribute name.</param>
/// <param name="value">Attribute value</param>
/// <returns>The element</returns>
public static HElement Attribute(this HElement element, String name, String value)
{
if (element != null && !String.IsNullOrWhiteSpace(name))
{
var attr = element.Attribute(name);
if (String.IsNullOrEmpty(value))
{
if (attr != null)
{
attr.Remove();
}
}
else
{
if (attr == null)
{
attr = new HAttribute(name);
element.Add(attr);
}
attr.Value = value;
}
}
return(element);
}
/// <summary>
/// Set one attribute for the element.
/// </summary>
public static HElement Attr(this HElement element, String name, String value)
{
return(element.Attribute(name, value));
}