private void MyEnumerate(ElementEnumerateEventHandler handler, ElementEnumerateEventArgs args)
{
foreach (DomElement element in this.Elements)
{
args._Parent = this;
args._Element = element;
args.CancelChild = false;
handler(this, args);
if (args.Cancel)
{
break;
}
if (args.CancelChild == false)
{
if (element is DomContainerElement)
{
((DomContainerElement)element).MyEnumerate(handler, args);
if (args.Cancel)
{
break;
}
}
}
args.CancelChild = false;
}
}
private static void InnerEnumerate(
DomElementList elements,
ElementEnumerateEventHandler handler,
ElementEnumerateEventArgs args,
bool deeply)
{
foreach (DomElement element in elements)
{
args._Element = element;
args.CancelChild = false;
handler(null, args);
if (args.Cancel)
{
break;
}
if (args.CancelChild == false && deeply)
{
if (element is DomContainerElement)
{
InnerEnumerate(((DomContainerElement)element).Elements, handler, args, deeply);
if (args.Cancel)
{
break;
}
}
}
args.CancelChild = false;
}
}
/// <summary>
/// 遍历子孙元素
/// </summary>
/// <param name="elements">要遍历的元素列表</param>
/// <param name="handler">遍历过程的委托对象</param>
public static void Enumerate(
DomElementList elements,
ElementEnumerateEventHandler handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
ElementEnumerateEventArgs args = new ElementEnumerateEventArgs();
InnerEnumerate(elements, handler, args, true);
}
/// <summary>
/// 遍历子孙元素
/// </summary>
/// <param name="includeSelfNode">是否包含节点本身</param>
/// <param name="handler">遍历过程的委托对象</param>
public void Enumerate(ElementEnumerateEventHandler handler, bool includeSelfNode)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
ElementEnumerateEventArgs args = new ElementEnumerateEventArgs();
if (includeSelfNode)
{
args._Parent = this.Parent;
args._Element = this;
handler(this, args);
if (args.Cancel || args.CancelChild)
{
return;
}
}
MyEnumerate(handler, args);
}
/// <summary>
/// 遍历子孙文档元素
/// </summary>
/// <param name="handler">遍历过程的委托对象</param>
public void Enumerate(ElementEnumerateEventHandler handler)
{
Enumerate(handler, false);
}
