public static IEnumerable <TreeNode> LazyGetItemsOfIList(TreeNode parent, Expression targetObject)
{
// Add a cast, so that we are sure the expression has an indexer.
// (The expression can be e.g. of type 'object' but its value is a List.
// Without the cast, evaluating "expr[i]" would fail, because object does not have an indexer).
targetObject = targetObject.CastToIList();
int count = 0;
GetValueException error = null;
try {
count = targetObject.GetIListCount();
} catch (GetValueException e) {
// Cannot yield a value in the body of a catch clause (CS1631)
error = e;
}
if (error != null)
{
yield return(new TreeNode(null, "(error)", error.Message, null, null, _ => null));
}
else if (count == 0)
{
yield return(new TreeNode(null, "(empty)", null, null, null, _ => null));
}
else
{
for (int i = 0; i < count; i++)
{
string imageName;
var image = ExpressionNode.GetImageForArrayIndexer(out imageName);
var itemNode = new ExpressionNode(parent, image, "[" + i + "]", targetObject.AppendIndexer(i));
itemNode.ImageName = imageName;
yield return(itemNode);
}
}
}
IEnumerable <TreeNode> LazyGetChildren()
{
// The whole array is small - just add all elements as childs
if (bounds.TotalElementCount <= MaxElementCount)
{
foreach (int[] indices in bounds.Indices)
{
string imageName;
var image = ExpressionNode.GetImageForArrayIndexer(out imageName);
var expression = new ExpressionNode(this, image, GetName(indices), arrayTarget.AppendIndexer(indices));
expression.ImageName = imageName;
yield return(expression);
}
yield break;
}
// Find a dimension of size at least 2
int splitDimensionIndex = bounds.Count - 1;
for (int i = 0; i < bounds.Count; i++)
{
if (bounds[i].Count > 1)
{
splitDimensionIndex = i;
break;
}
}
ArrayDimension splitDim = bounds[splitDimensionIndex];
// Split the dimension
int elementsPerSegment = 1;
while (splitDim.Count > elementsPerSegment * MaxElementCount)
{
elementsPerSegment *= MaxElementCount;
}
for (int i = splitDim.LowerBound; i <= splitDim.UpperBound; i += elementsPerSegment)
{
List <ArrayDimension> newDims = new List <ArrayDimension>(bounds);
newDims[splitDimensionIndex] = new ArrayDimension(i, Math.Min(i + elementsPerSegment - 1, splitDim.UpperBound));
yield return(new ArrayRangeNode(this, arrayTarget, new ArrayDimensions(newDims), originalBounds));
}
yield break;
}
public static IEnumerable <TreeNode> LazyGetItemsOfIList(Expression targetObject)
{
// This is needed for expanding IEnumerable<T>
targetObject = new CastExpression(
new TypeReference(typeof(IList).FullName),
targetObject,
CastType.Cast
);
int count = 0;
GetValueException error = null;
try {
count = GetIListCount(targetObject);
} catch (GetValueException e) {
// Cannot yield a value in the body of a catch clause (CS1631)
error = e;
}
if (error != null)
{
yield return(new TreeNode(null, "(error)", error.Message, null, null));
}
else if (count == 0)
{
yield return(new TreeNode(null, "(empty)", null, null, null));
}
else
{
for (int i = 0; i < count; i++)
{
string imageName;
var image = ExpressionNode.GetImageForArrayIndexer(out imageName);
var expression = new ExpressionNode(image, "[" + i + "]", targetObject.AppendIndexer(i));
expression.ImageName = imageName;
yield return(expression);
}
}
}
