private SyntaxToken GetAlignmentBaseTokenFor(SyntaxToken token)
{
var startNode = token.Parent;
var list = new List <AlignTokensOperation>();
var currentNode = startNode;
while (currentNode != null)
{
list.Clear();
_formattingRules.AddAlignTokensOperations(list, currentNode);
if (list.Count == 0)
{
currentNode = currentNode.Parent;
continue;
}
// make sure we have the given token as one of tokens to be aligned to the base token
var match = list.FirstOrDefault(o => o != null && o.Tokens.Contains(token));
if (match != null)
{
return(match.BaseToken);
}
currentNode = currentNode.Parent;
}
return(default);
protected virtual NodeOperations CreateNodeOperations(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
// iterating tree is very expensive. do it once and cache it to list
List <SyntaxNode> nodeIterator;
using (Logger.LogBlock(FunctionId.Formatting_IterateNodes, cancellationToken))
{
const int magicLengthToNodesRatio = 5;
var result = new List <SyntaxNode>(Math.Max(this.SpanToFormat.Length / magicLengthToNodesRatio, 4));
foreach (var node in _commonRoot.DescendantNodesAndSelf(this.SpanToFormat))
{
cancellationToken.ThrowIfCancellationRequested();
result.Add(node);
}
nodeIterator = result;
}
// iterate through each operation using index to not create any unnecessary object
cancellationToken.ThrowIfCancellationRequested();
List <IndentBlockOperation> indentBlockOperation;
using (Logger.LogBlock(FunctionId.Formatting_CollectIndentBlock, cancellationToken))
{
indentBlockOperation = AddOperations <IndentBlockOperation>(nodeIterator, (l, n) => _formattingRules.AddIndentBlockOperations(l, n), cancellationToken);
}
cancellationToken.ThrowIfCancellationRequested();
List <SuppressOperation> suppressOperation;
using (Logger.LogBlock(FunctionId.Formatting_CollectSuppressOperation, cancellationToken))
{
suppressOperation = AddOperations <SuppressOperation>(nodeIterator, (l, n) => _formattingRules.AddSuppressOperations(l, n), cancellationToken);
}
cancellationToken.ThrowIfCancellationRequested();
List <AlignTokensOperation> alignmentOperation;
using (Logger.LogBlock(FunctionId.Formatting_CollectAlignOperation, cancellationToken))
{
var operations = AddOperations <AlignTokensOperation>(nodeIterator, (l, n) => _formattingRules.AddAlignTokensOperations(l, n), cancellationToken);
// make sure we order align operation from left to right
operations.Sort((o1, o2) => o1.BaseToken.Span.CompareTo(o2.BaseToken.Span));
alignmentOperation = operations;
}
cancellationToken.ThrowIfCancellationRequested();
List <AnchorIndentationOperation> anchorIndentationOperations;
using (Logger.LogBlock(FunctionId.Formatting_CollectAnchorOperation, cancellationToken))
{
anchorIndentationOperations = AddOperations <AnchorIndentationOperation>(nodeIterator, (l, n) => _formattingRules.AddAnchorIndentationOperations(l, n), cancellationToken);
}
return(new NodeOperations(indentBlockOperation, suppressOperation, anchorIndentationOperations, alignmentOperation));
}