// ReSharper disable once NotNullMemberIsNotInitialized
public MarkupNodeReference(MarkupCollection owner, IMarkupDescriptor descriptor, IMarkupData associatedData)
{
Owner = owner;
Descriptor = descriptor;
AssociatedData = associatedData;
Markup = new Markup(this);
}
/// <summary> Marks the given range to have the given markup and data. </summary>
/// <exception cref="ArgumentOutOfRangeException"> Thrown when one or more arguments are outside
/// the required range. </exception>
/// <param name="range"> The range of text to mark. </param>
/// <param name="descriptor"> The type of markup to apply to the range. </param>
/// <param name="markupData"> The markup data to store with the markup. </param>
public Markup MarkRange(Range range, IMarkupDescriptor descriptor, IMarkupData markupData)
{
if (range.StartIndex < 0)
{
throw new ArgumentOutOfRangeException(nameof(range));
}
if (range.EndIndex > _owner.Length)
{
throw new ArgumentOutOfRangeException(nameof(range));
}
var newFragment = new MarkupNodeReference(this, descriptor, markupData)
{
Length = range.Length
};
int previousNodeAbsoluteIndex;
var previousNode = GetClosestNodeBefore(range.StartIndex, out previousNodeAbsoluteIndex);
LinkedListNode <MarkupNodeReference> node;
if (previousNode == null)
{
var nextNode = _subFragments.First;
if (nextNode != null)
{
// because we're at the beginning, the offset of the next fragment was an absolute index, thus
// we now convert it to a relative index by offsetting our start index.
nextNode.Value.RelativeOffsetSinceLastNode -= range.StartIndex;
}
node = _subFragments.AddFirst(newFragment);
newFragment.RelativeOffsetSinceLastNode = range.StartIndex;
}
else
{
var nextNode = previousNode.Next;
// fix up the next node's relative offset if need be
if (nextNode != null)
{
var nextFragment = nextNode.Value;
int absoluteIndexOfNextNode = nextFragment.RelativeOffsetSinceLastNode + previousNodeAbsoluteIndex;
nextFragment.RelativeOffsetSinceLastNode = absoluteIndexOfNextNode - range.StartIndex;
}
newFragment.RelativeOffsetSinceLastNode = range.StartIndex - previousNodeAbsoluteIndex;
node = _subFragments.AddAfter(previousNode, newFragment);
}
newFragment.Node = node;
ChangeIndex = ChangeIndex.Next();
return(newFragment.Markup);
}