/// <summary>
/// Convert custom attributes (that aren't found via reflection, e.g. width/height) into useable values
/// </summary>
/// <param name="attributes"></param>
/// <returns></returns>
protected AttributeDictionary HandleCustomAttributes(AttributeDictionary attributes)
{
var elementName = this.GetType().Name.Replace("TagHandler", "");
var customAttributes = attributes.Where(k => XmlLayoutUtilities.IsCustomAttribute(k.Key))
.ToList();
foreach (var attribute in customAttributes)
{
var customAttribute = XmlLayoutUtilities.GetCustomAttribute(attribute.Key);
if (customAttribute.RestrictToPermittedElementsOnly)
{
if (!customAttribute.PermittedElements.Contains(elementName, StringComparer.OrdinalIgnoreCase))
{
continue;
}
}
attributes = XmlLayoutUtilities.MergeAttributes(
attributes,
customAttribute.Convert(attribute.Value, attributes.Clone(), this.currentXmlElement));
customAttribute.Apply(currentXmlElement, attribute.Value, attributes.Clone());
if (customAttribute.UsesApplyMethod && !defaultAttributeValues.ContainsKey(attribute.Key))
{
defaultAttributeValues.Add(attribute.Key, customAttribute.DefaultValue);
}
if (!customAttribute.KeepOriginalTag)
{
attributes.Remove(attribute.Key);
}
}
return(attributes);
}
public static AttributeDictionary MergeAttributes(AttributeDictionary defaults, AttributeDictionary elementAttributes)
{
var result = defaults.Clone();
if (elementAttributes == null)
{
return(result);
}
foreach (var attribute in elementAttributes)
{
if (!result.ContainsKey(attribute.Key))
{
result.Add(attribute.Key, attribute.Value);
}
else
{
result[attribute.Key] = attribute.Value;
}
}
return(result);
}