public virtual void AddChild(ITree t)
{
if (t != null)
{
if (t.IsNil)
{
BaseTree baseTree = t as BaseTree;
if (baseTree != null && this.children != null && this.children == baseTree.children)
{
throw new Exception("attempt to add child list to itself");
}
if (t.ChildCount > 0)
{
if (this.children != null || baseTree == null)
{
if (this.children == null)
{
this.children = this.CreateChildrenList();
}
int childCount = t.ChildCount;
for (int i = 0; i < childCount; i++)
{
ITree child = t.GetChild(i);
this.children.Add(child);
child.Parent = this;
child.ChildIndex = this.children.Count - 1;
}
}
else
{
this.children = baseTree.children;
this.FreshenParentAndChildIndexes();
}
}
}
else
{
if (this.children == null)
{
this.children = this.CreateChildrenList();
}
this.children.Add(t);
t.Parent = this;
t.ChildIndex = this.children.Count - 1;
}
}
}
public virtual void SanityCheckParentAndChildIndexes(ITree parent, int i)
{
if (parent != this.Parent)
{
throw new InvalidOperationException("parents don't match; expected " + parent + " found " + this.Parent);
}
if (i != this.ChildIndex)
{
throw new InvalidOperationException("child indexes don't match; expected " + i + " found " + this.ChildIndex);
}
int childCount = this.ChildCount;
for (int j = 0; j < childCount; j++)
{
BaseTree baseTree = (BaseTree)this.GetChild(j);
baseTree.SanityCheckParentAndChildIndexes(this, j);
}
}
public virtual void ReplaceChildren(int startChildIndex, int stopChildIndex, object t)
{
if (startChildIndex < 0)
{
throw new ArgumentOutOfRangeException();
}
if (stopChildIndex < 0)
{
throw new ArgumentOutOfRangeException();
}
if (t == null)
{
throw new ArgumentNullException("t");
}
if (stopChildIndex < startChildIndex)
{
throw new ArgumentException();
}
if (this.children == null)
{
throw new ArgumentException("indexes invalid; no children in list");
}
int num = stopChildIndex - startChildIndex + 1;
ITree tree = (ITree)t;
List <ITree> list = null;
if (tree.IsNil)
{
BaseTree baseTree = tree as BaseTree;
if (baseTree != null && baseTree.children != null)
{
list = baseTree.children;
}
else
{
list = this.CreateChildrenList();
int childCount = tree.ChildCount;
for (int i = 0; i < childCount; i++)
{
list.Add(tree.GetChild(i));
}
}
}
else
{
list = new List <ITree>(1);
list.Add(tree);
}
int count = list.Count;
int count2 = list.Count;
int num2 = num - count;
if (num2 == 0)
{
int num3 = 0;
for (int j = startChildIndex; j <= stopChildIndex; j++)
{
ITree tree2 = list[num3];
this.children[j] = tree2;
tree2.Parent = this;
tree2.ChildIndex = j;
num3++;
}
}
else if (num2 > 0)
{
for (int k = 0; k < count2; k++)
{
this.children[startChildIndex + k] = list[k];
}
int num4 = startChildIndex + count2;
for (int l = num4; l <= stopChildIndex; l++)
{
this.children.RemoveAt(num4);
}
this.FreshenParentAndChildIndexes(startChildIndex);
}
else
{
for (int m = 0; m < num; m++)
{
this.children[startChildIndex + m] = list[m];
}
for (int n = num; n < count; n++)
{
this.children.Insert(startChildIndex + n, list[n]);
}
this.FreshenParentAndChildIndexes(startChildIndex);
}
}
