private static void AnalyzeUsings(SyntaxNodeAnalysisContext context, SyntaxList <UsingDirectiveSyntax> usings)
{
int count = usings.Count;
if (count <= 1)
{
return;
}
UsingDirectiveSyntax usingDirective1 = usings[0];
for (int i = 1; i < count; i++, usingDirective1 = usings[i - 1])
{
if (usingDirective1.StaticKeyword.IsKind(SyntaxKind.StaticKeyword))
{
return;
}
if (usingDirective1.Alias != null)
{
return;
}
UsingDirectiveSyntax usingDirective2 = usings[i];
if (usingDirective2.StaticKeyword.IsKind(SyntaxKind.StaticKeyword))
{
return;
}
if (usingDirective2.Alias != null)
{
return;
}
SyntaxTriviaList trailingTrivia = usingDirective1.GetTrailingTrivia();
if (!SyntaxTriviaAnalysis.IsOptionalWhitespaceThenOptionalSingleLineCommentThenEndOfLineTrivia(trailingTrivia))
{
continue;
}
IdentifierNameSyntax rootNamespace1 = usingDirective1.GetRootNamespace();
if (rootNamespace1 == null)
{
continue;
}
IdentifierNameSyntax rootNamespace2 = usingDirective2.GetRootNamespace();
if (rootNamespace2 == null)
{
continue;
}
SyntaxTriviaList leadingTrivia = usingDirective2.GetLeadingTrivia();
bool isEmptyLine = SyntaxTriviaAnalysis.StartsWithOptionalWhitespaceThenEndOfLineTrivia(leadingTrivia);
if (string.Equals(rootNamespace1.Identifier.ValueText, rootNamespace2.Identifier.ValueText, StringComparison.Ordinal))
{
if (isEmptyLine)
{
if (DiagnosticRules.RemoveBlankLineBetweenUsingDirectivesWithSameRootNamespace.IsEffective(context))
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.RemoveBlankLineBetweenUsingDirectivesWithSameRootNamespace,
Location.Create(context.Node.SyntaxTree, leadingTrivia[0].Span.WithLength(0)));
}
if (DiagnosticRules.BlankLineBetweenUsingDirectives.IsEffective(context) &&
context.GetBlankLineBetweenUsingDirectives() == UsingDirectiveBlankLineStyle.Never)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.BlankLineBetweenUsingDirectives,
Location.Create(context.Node.SyntaxTree, leadingTrivia[0].Span.WithLength(0)),
properties: DiagnosticProperties.AnalyzerOption_Invert,
"Remove");
}
}
}
else if (DiagnosticRules.BlankLineBetweenUsingDirectives.IsEffective(context))
{
UsingDirectiveBlankLineStyle style = context.GetBlankLineBetweenUsingDirectives();
if (isEmptyLine)
{
if (style == UsingDirectiveBlankLineStyle.Never)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.BlankLineBetweenUsingDirectives,
Location.Create(context.Node.SyntaxTree, leadingTrivia[0].Span.WithLength(0)),
properties: DiagnosticProperties.AnalyzerOption_Invert,
"Remove");
}
}
else if (style == UsingDirectiveBlankLineStyle.SeparateGroups)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.BlankLineBetweenUsingDirectives,
Location.Create(context.Node.SyntaxTree, trailingTrivia.Last().Span.WithLength(0)),
"Add");
}
}
}
}
