//public override void VisitBlock(Block block)
//{
// BlockBuilder parent = null;
// if (_blocks.Count > 0)
// {
// parent = _blocks.Peek();
// }
// BlockBuilder newBlock = new BlockBuilder(block);
// newBlock.Children.Clear();
// _blocks.Push(newBlock);
// if (block.Type == BlockType.Expression && parent != null)
// {
// VisitExpressionBlock(block, parent);
// }
// else
// {
// base.VisitBlock(block);
// }
// if (_blocks.Count > 1)
// {
// parent.Children.Add(_blocks.Pop().Build());
// }
//}
//public override void VisitSpan(Span span)
//{
// Debug.Assert(_blocks.Count > 0);
// _blocks.Peek().Children.Add(span);
//}
protected override SyntaxTreeNode RewriteBlock(BlockBuilder parent, Block block)
{
BlockBuilder newBlock = new BlockBuilder(block);
newBlock.Children.Clear();
Span ws = block.Children.FirstOrDefault() as Span;
IEnumerable<SyntaxTreeNode> newNodes = block.Children;
if (ws.Content.All(Char.IsWhiteSpace))
{
// Add this node to the parent
SpanBuilder builder = new SpanBuilder(ws);
builder.ClearSymbols();
FillSpan(builder, ws.Start, ws.Content);
parent.Children.Add(builder.Build());
// Remove the old whitespace node
newNodes = block.Children.Skip(1);
}
foreach (SyntaxTreeNode node in newNodes)
{
newBlock.Children.Add(node);
}
return newBlock.Build();
}
protected virtual SpanBuilder UpdateSpan(Span target, TextChange normalizedChange)
{
string newContent = normalizedChange.ApplyChange(target);
SpanBuilder newSpan = new SpanBuilder(target);
newSpan.ClearSymbols();
foreach (ISymbol sym in Tokenizer(newContent))
{
sym.OffsetStart(target.Start);
newSpan.Accept(sym);
}
if (target.Next != null)
{
SourceLocation newEnd = SourceLocationTracker.CalculateNewLocation(target.Start, newContent);
target.Next.ChangeStart(newEnd);
}
return newSpan;
}