public void Add(Range rangeToAdd)
{
if (rangeToAdd.IsEmpty)
{
return;
}
for (LinkedListNode <Range> i = ranges.First; i != null; i = i.Next)
{
IntersectStruct r = Range.Intersect(rangeToAdd, i.Value);
if (r.RelativePosition < 0)
{
ranges.AddBefore(i, rangeToAdd);
rangeToAdd = new Range();
break;
}
else if (r.RelativePosition > 0)
{
}
else
{
if (!r.Leftover1Left.IsEmpty)
{
ranges.AddBefore(i, r.Leftover1Left);
}
if (!r.Leftover2Left.IsEmpty)
{
ranges.AddBefore(i, r.Leftover2Left);
}
if (!r.Common.IsEmpty)
{
i.Value = r.Common;
}
if (!r.Leftover2Right.IsEmpty)
{
i = ranges.AddAfter(i, r.Leftover2Right);
}
if (!r.Leftover1Right.IsEmpty)
{
rangeToAdd = r.Leftover1Right;
}
else
{
rangeToAdd = new Range();
break;
}
}
}
if (!rangeToAdd.IsEmpty)
{
ranges.AddLast(rangeToAdd);
}
MergeDown();
}
public void Remove(Range rangeToRemove)
{
for (LinkedListNode <Range> i = ranges.First; i != null;)
{
LinkedListNode <Range> next = i.Next;
IntersectStruct r = Range.Intersect(rangeToRemove, i.Value);
if (r.RelativePosition == 0)
{
rangeToRemove = r.Leftover1Right;
if (!r.Leftover2Left.IsEmpty)
{
ranges.AddBefore(i, r.Leftover2Left);
}
if (!r.Leftover2Right.IsEmpty)
{
ranges.AddBefore(i, r.Leftover2Right);
}
ranges.Remove(i);
}
i = next;
}
MergeDown();
}
public static IntersectStruct Intersect(Range r1, Range r2)
{
IntersectStruct ret = new IntersectStruct();
if (r1.Begin <= r2.Begin)
{
// r1: |----
// r2: |---
if (r2.Begin >= r1.End)
{
// r1: |---|
// r2: |---|
ret.RelativePosition = -1;
}
else
{
ret.Leftover1Left = new Range(r1.Begin, r2.Begin);
ret.RelativePosition = 0;
if (r1.End >= r2.End)
{
// r1: |-------|
// r2: |---|
ret.Common = new Range(r2.Begin, r2.End);
ret.Leftover1Right = new Range(r2.End, r1.End);
}
else
{
// r1: |-------|
// r2: |-------|
ret.Common = new Range(r2.Begin, r1.End);
ret.Leftover2Right = new Range(r1.End, r2.End);
}
}
}
else
{
// r1: |----
// r2: |---
if (r1.Begin >= r2.End)
{
// r1: |---|
// r2: |---|
ret.RelativePosition = 1;
}
else
{
ret.Leftover2Left = new Range(r2.Begin, r1.Begin);
ret.RelativePosition = 0;
if (r2.End >= r1.End)
{
// r1: |---|
// r2: |---------|
ret.Common = new Range(r1.Begin, r1.End);
ret.Leftover2Right = new Range(r1.End, r2.End);
}
else
{
// r1: |-------|
// r2: |-------|
ret.Common = new Range(r1.Begin, r2.End);
ret.Leftover1Right = new Range(r2.End, r1.End);
}
}
}
ret.Leftover1Left.priority = r1.priority;
ret.Leftover1Right.priority = r1.priority;
ret.Leftover2Left.priority = r2.priority;
ret.Leftover2Right.priority = r2.priority;
if (!ret.Common.IsEmpty)
{
ret.Common.priority = Math.Max(r1.priority, r2.priority);
}
return(ret);
}
