/// <summary>
/// Returns true if the specified element begins and ends within the range.
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
private bool isInScope(IHTMLElement e)
{
MarkupPointer p = MarkupServices.CreateMarkupPointer(e, _ELEMENT_ADJACENCY.ELEM_ADJ_BeforeBegin);
if (p.IsRightOfOrEqualTo(Start))
{
p = MarkupServices.CreateMarkupPointer(e, _ELEMENT_ADJACENCY.ELEM_ADJ_AfterEnd);
if (p.IsLeftOfOrEqualTo(End))
{
return(true);
}
}
return(false);
}
///// <summary>
///// Gets the elements in the range that match the filter.
///// </summary>
///// <param name="filter">the delegate testing each element to determine if it should be added to the list of elements to return</param>
///// <param name="inScopeElementsOnly">if true, the only</param>
///// <returns></returns>
//public IHTMLElement[] GetElements(IHTMLElementFilter filter, bool inScopeElementsOnly)
//{
// ArrayList list = new ArrayList();
// if (!IsEmpty())
// {
// Hashtable usedElements = new Hashtable();
// MarkupPointer p = MarkupServices.CreateMarkupPointer(Start);
// MarkupPointer end = MarkupServices.CreateMarkupPointer(End);
// MarkupContext context = p.Right(false);
// //move p through the range to locate each the elements adding elements that pass the filter
// while (p.IsLeftOfOrEqualTo(end))
// {
// if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope
// || context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope
// || context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_NoScope)
// {
// if (usedElements[context.Element] == null)
// {
// if ((inScopeElementsOnly && isInScope(context.Element)) || !inScopeElementsOnly)
// if (filter(context.Element))
// {
// list.Add(context.Element);
// }
// //cache the fact that we've already tested this element.
// usedElements[context.Element] = context.Element;
// }
// }
// p.Right(true, context);
// }
// }
// return HTMLElementHelper.ToElementArray(list);
//}
/// <summary>
/// Gets the first element in the range that match the filter.
/// </summary>
/// <param name="filter">the delegate testing each element to determine if it should be added to the list of elements to return</param>
/// <param name="inScopeElementsOnly">if true, the only</param>
/// <returns></returns>
public IHTMLElement GetFirstElement(IHTMLElementFilter filter, bool inScopeElementsOnly)
{
ArrayList list = new ArrayList();
if (!IsEmpty())
{
Hashtable usedElements = new Hashtable();
MarkupPointer p = MarkupServices.CreateMarkupPointer(Start);
MarkupPointer end = MarkupServices.CreateMarkupPointer(End);
MarkupContext context = p.Right(false);
//move p through the range to locate each the elements adding elements that pass the filter
while (p.IsLeftOfOrEqualTo(end))
{
if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope ||
context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope ||
context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_NoScope)
{
if (usedElements[context.Element] == null)
{
if ((inScopeElementsOnly && isInScope(context.Element)) || !inScopeElementsOnly)
{
if (filter(context.Element))
{
return(context.Element);
}
}
//cache the fact that we've already tested this element.
usedElements[context.Element] = context.Element;
}
}
p.Right(true, context);
}
}
return(null);
}
