private Dictionary <TriviaLocation, SyntaxToken> GetTokensAtEdges(SyntaxNode root, TextSpan textSpan)
{
var tokens = new Dictionary <TriviaLocation, SyntaxToken>();
tokens[TriviaLocation.AfterBeginningOfSpan] = _syntaxFactsService.FindTokenOnRightOfPosition(root, textSpan.Start, includeSkipped: false);
tokens[TriviaLocation.BeforeBeginningOfSpan] = tokens[TriviaLocation.AfterBeginningOfSpan].GetPreviousToken(includeZeroWidth: true);
tokens[TriviaLocation.BeforeEndOfSpan] = _syntaxFactsService.FindTokenOnLeftOfPosition(root, textSpan.End, includeSkipped: false);
tokens[TriviaLocation.AfterEndOfSpan] = tokens[TriviaLocation.BeforeEndOfSpan].GetNextToken(includeZeroWidth: true);
return(tokens);
}
/// <summary>
/// Find closest token (including one in structured trivia) right of given position
/// </summary>
private SyntaxToken FindTokenOnRightOfPosition(ISyntaxFactsService syntaxFactsService, SyntaxNode root, int position)
{
var token = syntaxFactsService.FindTokenOnRightOfPosition(root, position, includeSkipped: true, includeDirectives: true, includeDocumentationComments: true);
if (token.RawKind == 0)
{
return(root.GetLastToken(includeZeroWidth: true, includeSkipped: true, includeDirectives: true, includeDocumentationComments: true));
}
return(token);
}
/// <summary>
/// Find closest token (including one in structured trivia) right of given position
/// </summary>
private SyntaxToken FindTokenOnRightOfPosition(ISyntaxFactsService syntaxFactsService, SyntaxNode root, int position)
{
var token = syntaxFactsService.FindTokenOnRightOfPosition(root, position, includeSkipped: true, includeDirectives: true, includeDocumentationComments: true);
if (token.RawKind == 0)
{
return root.GetLastToken(includeZeroWidth: true, includeSkipped: true, includeDirectives: true, includeDocumentationComments: true);
}
return token;
}