public IDocumentFragment ExtractContent()
{
var fragment = _start.Node.Owner !.CreateDocumentFragment();
if (!_start.Equals(_end))
{
var newBoundary = _start;
var originalStart = _start;
var originalEnd = _end;
if (originalStart.Node == originalEnd.Node && _start.Node is ICharacterData)
{
var text = (ICharacterData)originalStart.Node;
var strt = originalStart.Offset;
var span = originalEnd.Offset - originalStart.Offset;
var clone = (ICharacterData)text.Clone();
clone.Data = text.Substring(strt, span);
fragment.AppendChild(clone);
text.Replace(strt, span, String.Empty);
}
else
{
var commonAncestor = originalStart.Node;
while (!commonAncestor.IsInclusiveAncestorOf(originalEnd.Node))
{
commonAncestor = commonAncestor.Parent !;
}
var firstPartiallyContainedChild = !originalStart.Node.IsInclusiveAncestorOf(originalEnd.Node) ?
commonAncestor.GetNodes <INode>(predicate: IsPartiallyContained).FirstOrDefault() : null;
var lastPartiallyContainedchild = !originalEnd.Node.IsInclusiveAncestorOf(originalStart.Node) ?
commonAncestor.GetNodes <INode>(predicate: IsPartiallyContained).LastOrDefault() : null;
var containedChildren = commonAncestor.GetNodes <INode>(predicate: Intersects).ToList();
if (containedChildren.OfType <IDocumentType>().Any())
{
throw new DomException(DomError.HierarchyRequest);
}
if (!originalStart.Node.IsInclusiveAncestorOf(originalEnd.Node))
{
var referenceNode = originalStart.Node;
while (referenceNode.Parent != null && !referenceNode.IsInclusiveAncestorOf(originalEnd.Node))
{
referenceNode = referenceNode.Parent;
}
newBoundary = new Boundary(referenceNode, referenceNode.Parent !.ChildNodes.Index(referenceNode) + 1);
}
if (firstPartiallyContainedChild is ICharacterData)
{
var text = (ICharacterData)originalStart.Node;
var strt = originalStart.Offset;
var span = text.Length - originalStart.Offset;
var clone = (ICharacterData)text.Clone();
clone.Data = text.Substring(strt, span);
fragment.AppendChild(clone);
text.Replace(strt, span, String.Empty);
}
else if (firstPartiallyContainedChild != null)
{
var clone = firstPartiallyContainedChild.Clone();
fragment.AppendChild(clone);
var subrange = new Range(originalStart, new Boundary(firstPartiallyContainedChild, firstPartiallyContainedChild.ChildNodes.Length));
var subfragment = subrange.ExtractContent();
fragment.AppendChild(subfragment);
}
foreach (var child in containedChildren)
{
fragment.AppendChild(child);
}
if (lastPartiallyContainedchild is ICharacterData)
{
var text = (ICharacterData)originalEnd.Node;
var clone = (ICharacterData)text.Clone();
clone.Data = text.Substring(0, originalEnd.Offset);
fragment.AppendChild(clone);
text.Replace(0, originalEnd.Offset, String.Empty);
}
else if (lastPartiallyContainedchild != null)
{
var clone = lastPartiallyContainedchild.Clone();
fragment.AppendChild(clone);
var subrange = new Range(new Boundary(lastPartiallyContainedchild, 0), originalEnd);
var subfragment = subrange.ExtractContent();
fragment.AppendChild(subfragment);
}
_start = newBoundary;
_end = newBoundary;
}
}
return(fragment);
}
public void Insert(INode node)
{
if (node is null)
{
throw new ArgumentNullException(nameof(node));
}
var snode = _start.Node;
var type = snode.NodeType;
var istext = type == NodeType.Text;
if (type == NodeType.ProcessingInstruction || type == NodeType.Comment || (istext && snode.Parent is null))
{
throw new DomException(DomError.HierarchyRequest);
}
var referenceNode = istext ? snode : _start.ChildAtOffset;
var parent = referenceNode is null ? snode : referenceNode.Parent;
parent !.EnsurePreInsertionValidity(node, referenceNode);
if (istext)
{
referenceNode = ((IText)snode).Split(_start.Offset);
parent = referenceNode.Parent;
}
if (node == referenceNode)
{
referenceNode = referenceNode.NextSibling;
}
node.Parent?.RemoveChild(node);
var newOffset = referenceNode is null ? parent !.ChildNodes.Length : parent !.ChildNodes.Index(referenceNode);
newOffset += node.NodeType == NodeType.DocumentFragment ? node.ChildNodes.Length : 1;
parent.PreInsert(node, referenceNode);
if (_start.Equals(_end))
{
_end = new Boundary(parent, newOffset);
}
}
public void ClearContent()
{
if (!_start.Equals(_end))
{
var newBoundary = new Boundary();
var originalStart = _start;
var originalEnd = _end;
if (originalEnd.Node == originalStart.Node && originalStart.Node is ICharacterData)
{
var strt = originalStart.Offset;
var text = (ICharacterData)originalStart.Node;
var span = originalEnd.Offset - originalStart.Offset;
text.Replace(strt, span, String.Empty);
}
else
{
var nodesToRemove = Nodes.Where(m => !Intersects(m.Parent !)).ToArray();
if (!originalStart.Node.IsInclusiveAncestorOf(originalEnd.Node))
{
var referenceNode = originalStart.Node;
while (referenceNode.Parent != null && referenceNode.Parent.IsInclusiveAncestorOf(originalEnd.Node))
{
referenceNode = referenceNode.Parent;
}
newBoundary = new Boundary(referenceNode.Parent !, referenceNode.Parent !.ChildNodes.Index(referenceNode) + 1);
}
else
{
newBoundary = originalStart;
}
if (originalStart.Node is ICharacterData)
{
var strt = originalStart.Offset;
var text = (ICharacterData)originalStart.Node;
var span = originalEnd.Offset - originalStart.Offset;
text.Replace(strt, span, String.Empty);
}
foreach (var node in nodesToRemove)
{
node.Parent !.RemoveChild(node);
}
if (originalEnd.Node is ICharacterData)
{
var strt = 0;
var text = (ICharacterData)originalEnd.Node;
var span = originalEnd.Offset;
text.Replace(strt, span, String.Empty);
}
_start = newBoundary;
_end = newBoundary;
}
}
}
