private static ConcateRope CreateRope(int depth, int length)
{
Debug.Assert(depth >= 1);
var numOfParts = depth + 1;
var lengthOfParts = length / numOfParts;
var primitiveRope = new FlatRope(new String(' ', lengthOfParts));
Rope rope = primitiveRope;
for (var i = 1; i < numOfParts; i++) {
if (i < numOfParts - 1) {
rope = new ConcateRope(rope, primitiveRope);
}
else {
var lastRope = new FlatRope(new String(' ', length - rope.Length));
rope = new ConcateRope(rope, lastRope);
}
}
var concateRope = rope.As<ConcateRope>();
Debug.Assert(concateRope.Depth == depth);
Debug.Assert(concateRope.Length == length);
return concateRope;
}
public SubStringRope(FlatRope rope, int offset, int length)
{
if (length < 0 || offset < 0 || offset + length > rope.Length())
{
throw new IndexOutOfRangeException("Invalid substring offset (" + offset + ") and length (" + length + ")");
}
this.rope = rope;
this.offset = offset;
this.length = length;
}