public virtual IEnumerable <Tag> Apply(IEnumerable <Tag> tags)
{
foreach (var tag in tags)
{
var start = tag.Parent.Children.OfType <Tag>().First(t => t.TagName == tag.TagName);
List <Tag> siblingTags = new List <Tag>()
{
start
};
var sibling = start.NextSibling;
while (sibling != null)
{
Tag siblingTag = sibling as Tag;
if (siblingTag != null && siblingTag.TagName == tag.TagName)
{
siblingTags.Add(siblingTag);
}
sibling = sibling.NextSibling;
}
foreach (var index in expression.GetValues().TakeWhile(n => n <= siblingTags.Count))
{
if (index > 0)
{
yield return(siblingTags[index - 1]);
}
}
}
}
public IEnumerable <Tag> Apply(IEnumerable <Tag> tags)
{
foreach (var tag in tags)
{
List <Tag> siblingTags = new List <Tag>()
{
tag
};
var sibling = tag.NextSibling;
while (sibling != null)
{
Tag siblingTag = sibling as Tag;
if (siblingTag != null && siblingTag.TagName == tag.TagName)
{
siblingTags.Add(siblingTag);
}
sibling = sibling.NextSibling;
}
foreach (var index in expression.GetValues().TakeWhile(n => n > 0))
{
if (index <= siblingTags.Count)
{
yield return(siblingTags[siblingTags.Count - index]);
}
}
}
}
public IEnumerable <Tag> Apply(IEnumerable <Tag> tags)
{
foreach (var tag in tags)
{
IList <Tag> childrenTags = tag.Children.OfType <Tag>().ToList();
foreach (var index in expression.GetValues().TakeWhile(n => n <= tag.Children.Count))
{
if (index > 0)
{
yield return(childrenTags[index - 1]);
}
}
}
}