private VirtualTreePoint GetBodyStartPoint(SourceText text, SyntaxToken openBrace, SyntaxToken closeBrace, int memberStartColumn)
{
Debug.Assert(!openBrace.IsMissing);
Debug.Assert(!closeBrace.IsMissing);
Debug.Assert(memberStartColumn >= 0);
var openBraceLine = text.Lines.GetLineFromPosition(openBrace.SpanStart);
var closeBraceLine = text.Lines.GetLineFromPosition(closeBrace.SpanStart);
var tokenAfterOpenBrace = openBrace.GetNextToken();
var nextPosition = tokenAfterOpenBrace.SpanStart;
// We need to check if there is any significant trivia trailing this token or leading
// to the next token. This accounts for the fact that comments were included in the token
// stream in Dev10.
var significantTrivia = openBrace.GetAllTrailingTrivia()
.Where(t => !t.MatchesKind(SyntaxKind.WhitespaceTrivia, SyntaxKind.EndOfLineTrivia))
.FirstOrDefault();
if (significantTrivia.Kind() != SyntaxKind.None)
{
nextPosition = significantTrivia.SpanStart;
}
// If the opening and closing curlies are at least two lines apart then place the cursor
// on the next line provided that there isn't any token on the line with the open curly.
if (openBraceLine.LineNumber + 1 < closeBraceLine.LineNumber &&
openBraceLine.LineNumber < text.Lines.IndexOf(tokenAfterOpenBrace.SpanStart))
{
var lineAfterOpenBrace = text.Lines[openBraceLine.LineNumber + 1];
var firstNonWhitespaceOffset = lineAfterOpenBrace.GetFirstNonWhitespaceOffset() ?? -1;
// If the line contains any text, we return the start of the first non-whitespace character.
if (firstNonWhitespaceOffset >= 0)
{
return new VirtualTreePoint(openBrace.SyntaxTree, text, lineAfterOpenBrace.Start + firstNonWhitespaceOffset);
}
// If the line is all whitespace then place the caret at the first indent after the start
// of the member.
var indentSize = GetTabSize(text);
var lineText = lineAfterOpenBrace.ToString();
var lineEndColumn = lineText.GetColumnFromLineOffset(lineText.Length, indentSize);
int indentColumn = memberStartColumn + indentSize;
var virtualSpaces = indentColumn - lineEndColumn;
return new VirtualTreePoint(openBrace.SyntaxTree, text, lineAfterOpenBrace.End, virtualSpaces);
}
else
{
// If the body is empty then place it after the open brace; otherwise, place
// at the start of the first token after the open curly.
if (closeBrace.SpanStart == nextPosition)
{
return new VirtualTreePoint(openBrace.SyntaxTree, text, openBrace.Span.End);
}
else
{
return new VirtualTreePoint(openBrace.SyntaxTree, text, nextPosition);
}
}
}
