public static bool Intersects(
this IAttributedTextRun first,
IAttributedTextRun second)
{
if (first == null || second == null)
return false;
if (first.Start < second.GetEnd())
return first.GetEnd() > second.Start;
return false;
}
public static bool Intersects(
this IAttributedTextRun first,
int start,
int length)
{
if (first == null)
return false;
var end = start + length;
if (first.Start < end)
return first.GetEnd() > start;
return false;
}
public static bool Intersects(
this IAttributedTextRun first,
IAttributedTextRun second)
{
if (first == null || second == null)
{
return(false);
}
if (first.Start < second.GetEnd())
{
return(first.GetEnd() > second.Start);
}
return(false);
}
public static IList<IAttributedTextRun> CalculatedIntersections(
this IAttributedTextRun first,
IAttributedTextRun second)
{
List<IAttributedTextRun> intersections = new List<IAttributedTextRun>();
var combined = first.Attributes.Union(second.Attributes);
if (first.Start == second.Start)
{
if (first.Length == second.Length)
{
intersections.Add(new AttributedTextRun(first.Start, first.Length, combined));
}
else if (first.Length > second.Length)
{
var start1 = first.Start;
var length1 = Math.Min(first.Length, second.Length);
var start2 = start1 + length1;
var length2 = Math.Max(first.Length, second.Length) - length1;
intersections.Add(new AttributedTextRun(start1, length1, combined));
intersections.Add(new AttributedTextRun(start2, length2, first.Attributes));
}
else if (first.Length < second.Length)
{
var start1 = first.Start;
var length1 = Math.Min(first.Length, second.Length);
var start2 = start1 + length1;
var length2 = Math.Max(first.Length, second.Length) - length1;
intersections.Add(new AttributedTextRun(start1, length1, combined));
intersections.Add(new AttributedTextRun(start2, length2, second.Attributes));
}
}
else if (first.GetEnd() == second.GetEnd())
{
if (first.Start < second.Start)
{
var start1 = first.Start;
var length1 = second.Start - first.Start;
var start2 = start1 + length1;
var length2 = Math.Max(first.Length, second.Length) - length1;
intersections.Add(new AttributedTextRun(start1, length1, first.Attributes));
intersections.Add(new AttributedTextRun(start2, length2, combined));
}
else
{
var start1 = second.Start;
var length1 = first.Start - second.Start;
var start2 = start1 + length1;
var length2 = Math.Max(first.Length, second.Length) - length1;
intersections.Add(new AttributedTextRun(start1, length1, second.Attributes));
intersections.Add(new AttributedTextRun(start2, length2, combined));
}
}
else
{
if (first.Start < second.Start)
{
var start1 = first.Start;
var length1 = second.Start - first.Start;
var start2 = start1 + length1;
var length2 = second.Length;
var start3 = start2 + length2;
var length3 = Math.Max(first.Length, second.Length) - (length1 + length2);
intersections.Add(new AttributedTextRun(start1, length1, first.Attributes));
intersections.Add(new AttributedTextRun(start2, length2, combined));
intersections.Add(new AttributedTextRun(start3, length3, first.GetEnd() > second.GetEnd() ? first.Attributes : second.Attributes));
}
else
{
var start1 = second.Start;
var length1 = first.Start - second.Start;
var start2 = start1 + length1;
var length2 = first.Length;
var start3 = start2 + length2;
var length3 = Math.Max(first.Length, second.Length) - (length1 + length2);
intersections.Add(new AttributedTextRun(start1, length1, second.Attributes));
intersections.Add(new AttributedTextRun(start2, length2, combined));
intersections.Add(new AttributedTextRun(start3, length3, first.GetEnd() > second.GetEnd() ? first.Attributes : second.Attributes));
}
}
return intersections;
}