private ISet <INamespaceSymbol> GetNamespacesInScope(CancellationToken cancellationToken)
{
// Add all the namespaces brought in by imports/usings.
var set = _owner.GetImportNamespacesInScope(
_semanticModel,
_node,
cancellationToken
);
// Also add all the namespaces we're contained in. We don't want
// to add imports for these namespaces either.
for (
var containingNamespace = _semanticModel.GetEnclosingNamespace(
_node.SpanStart,
cancellationToken
);
containingNamespace != null;
containingNamespace = containingNamespace.ContainingNamespace
)
{
set.Add(MapToCompilationNamespaceIfPossible(containingNamespace));
}
return(set);
}
private bool DetermineNamespaceOrTypeToGenerateInWorker(
TService service,
SemanticModel semanticModel,
CancellationToken cancellationToken
)
{
// If we're on the right of a dot, see if we can figure out what's on the left. If
// it doesn't bind to a type or a namespace, then we can't proceed.
if (SimpleName != NameOrMemberAccessExpression)
{
return(DetermineNamespaceOrTypeToGenerateIn(
service,
semanticModel,
service.GetLeftSideOfDot(SimpleName),
cancellationToken
));
}
else
{
// The name is standing alone. We can either generate the type into our
// containing type, or into our containing namespace.
//
// TODO(cyrusn): We need to make this logic work if the type is in the
// base/interface list of a type.
var format = SymbolDisplayFormat.FullyQualifiedFormat.WithGlobalNamespaceStyle(
SymbolDisplayGlobalNamespaceStyle.Omitted
);
TypeToGenerateInOpt = service.DetermineTypeToGenerateIn(
semanticModel,
SimpleName,
cancellationToken
);
if (TypeToGenerateInOpt != null)
{
NamespaceToGenerateInOpt =
TypeToGenerateInOpt.ContainingNamespace.ToDisplayString(format);
}
else
{
var namespaceSymbol = semanticModel.GetEnclosingNamespace(
SimpleName.SpanStart,
cancellationToken
);
if (namespaceSymbol != null)
{
NamespaceToGenerateInOpt = namespaceSymbol.ToDisplayString(format);
}
}
}
return(true);
}
private bool IsInsideNamespace(SyntaxNode node, INamespaceSymbol symbol, SemanticModel model, CancellationToken cancellationToken)
{
var containedNamespace = model.GetEnclosingNamespace(node.SpanStart, cancellationToken);
while (containedNamespace != null)
{
if (containedNamespace.Equals(symbol))
{
return(true);
}
containedNamespace = containedNamespace.ContainingNamespace;
}
return(false);
}
protected static ImmutableArray <ISymbol> GetRecommendedNamespaceNameSymbols(
SemanticModel semanticModel, SyntaxNode declarationSyntax, CancellationToken cancellationToken)
{
if (declarationSyntax == null)
{
throw new ArgumentNullException(nameof(declarationSyntax));
}
var containingNamespaceSymbol = semanticModel.Compilation.GetCompilationNamespace(
semanticModel.GetEnclosingNamespace(declarationSyntax.SpanStart, cancellationToken));
var symbols = semanticModel.LookupNamespacesAndTypes(declarationSyntax.SpanStart, containingNamespaceSymbol)
.WhereAsArray(recommendationSymbol => IsNonIntersectingNamespace(recommendationSymbol, declarationSyntax));
return(symbols);
}
protected static IEnumerable<ISymbol> GetRecommendedNamespaceNameSymbols(
SemanticModel semanticModel, SyntaxNode declarationSyntax, CancellationToken cancellationToken)
{
if (declarationSyntax == null)
{
throw new ArgumentNullException(nameof(declarationSyntax));
}
var containingNamespaceSymbol = semanticModel.Compilation.GetCompilationNamespace(
semanticModel.GetEnclosingNamespace(declarationSyntax.SpanStart, cancellationToken));
var symbols = semanticModel.LookupNamespacesAndTypes(declarationSyntax.SpanStart, containingNamespaceSymbol)
.Where(recommendationSymbol => IsNonIntersectingNamespace(recommendationSymbol, declarationSyntax));
return symbols;
}
IEnumerable <IMethodSymbol> GetExtensionMethods(SemanticModel semanticModel, ITypeSymbol typeToExtend, InvocationExpressionSyntax node, CancellationToken cancellationToken)
{
var usedNamespaces = new HashSet <string> ();
foreach (var un in semanticModel.GetUsingNamespacesInScope(node))
{
usedNamespaces.Add(un.GetFullName());
}
var enclosingNamespaceName = semanticModel.GetEnclosingNamespace(node.SpanStart, cancellationToken).GetFullName();
var stack = new Stack <INamespaceOrTypeSymbol> ();
stack.Push(semanticModel.Compilation.GlobalNamespace);
while (stack.Count > 0)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
var current = stack.Pop();
var currentNs = current as INamespaceSymbol;
if (currentNs != null)
{
foreach (var member in currentNs.GetNamespaceMembers())
{
var currentNsName = member.GetFullName();
if (usedNamespaces.Contains(currentNsName) ||
enclosingNamespaceName == currentNsName ||
(enclosingNamespaceName.StartsWith(currentNsName, StringComparison.Ordinal) &&
enclosingNamespaceName [currentNsName.Length] == '.'))
{
stack.Push(member);
}
}
foreach (var member in currentNs.GetTypeMembers())
{
stack.Push(member);
}
}
else
{
var type = (INamedTypeSymbol)current;
if (type.IsImplicitClass || type.IsScriptClass)
{
continue;
}
if (type.DeclaredAccessibility != Accessibility.Public)
{
if (type.DeclaredAccessibility != Accessibility.Internal)
{
continue;
}
if (!type.IsAccessibleWithin(semanticModel.Compilation.Assembly))
{
continue;
}
}
if (!type.MightContainExtensionMethods)
{
continue;
}
foreach (var extMethod in type.GetMembers().OfType <IMethodSymbol> ().Where(method => method.IsExtensionMethod))
{
var reducedMethod = extMethod.ReduceExtensionMethod(typeToExtend);
if (reducedMethod != null)
{
yield return(reducedMethod);
}
}
}
}
}
internal void AddImportCompletionData(CSharpSyntaxContext ctx, CompletionDataList result, SemanticModel semanticModel, int position, CancellationToken cancellationToken = default(CancellationToken))
{
if (ctx == null)
{
throw new ArgumentNullException(nameof(ctx));
}
if (result == null)
{
throw new ArgumentNullException(nameof(result));
}
if (semanticModel == null)
{
throw new ArgumentNullException(nameof(semanticModel));
}
try {
if (result.Count == 0 || position < 0)
{
return;
}
var syntaxTree = semanticModel.SyntaxTree;
var root = syntaxTree.GetRoot();
if (syntaxTree.IsInNonUserCode(position, cancellationToken) ||
syntaxTree.GetContainingTypeOrEnumDeclaration(position, cancellationToken) is EnumDeclarationSyntax ||
syntaxTree.IsPreProcessorDirectiveContext(position, cancellationToken))
{
return;
}
var extensionMethodImport = syntaxTree.IsRightOfDotOrArrowOrColonColon(
position,
syntaxTree.FindTokenOnLeftOfPosition(position, cancellationToken).GetPreviousTokenIfTouchingWord(position),
cancellationToken);
ITypeSymbol extensionMethodReceiverType = null;
if (extensionMethodImport)
{
if (ctx.TargetToken.Parent is MemberAccessExpressionSyntax memberAccess)
{
var symbol = ctx.SemanticModel.GetSymbolInfo(memberAccess.Expression).Symbol;
if (symbol != null && symbol.Kind == SymbolKind.NamedType)
{
return;
}
extensionMethodReceiverType = ctx.SemanticModel.GetTypeInfo(memberAccess.Expression).Type;
if (extensionMethodReceiverType == null)
{
return;
}
}
else
{
return;
}
}
var tokenLeftOfPosition = syntaxTree.FindTokenOnLeftOfPosition(position, cancellationToken);
if (extensionMethodImport ||
syntaxTree.IsGlobalStatementContext(position, cancellationToken) ||
syntaxTree.IsExpressionContext(position, tokenLeftOfPosition, true, cancellationToken) ||
syntaxTree.IsStatementContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsTypeContext(position, cancellationToken) ||
syntaxTree.IsTypeDeclarationContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsMemberDeclarationContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsLabelContext(position, cancellationToken))
{
var usedNamespaces = new HashSet <string> ();
var node = root.FindNode(TextSpan.FromBounds(position, position));
if (node != null)
{
foreach (var un in semanticModel.GetUsingNamespacesInScope(node))
{
usedNamespaces.Add(un.GetFullName());
}
}
var enclosingNamespaceName = semanticModel.GetEnclosingNamespace(position, cancellationToken)?.GetFullName() ?? "";
var stack = new Stack <INamespaceOrTypeSymbol> ();
foreach (var member in semanticModel.Compilation.GlobalNamespace.GetNamespaceMembers())
{
stack.Push(member);
}
var extMethodDict = extensionMethodImport ? new Dictionary <INamespaceSymbol, List <ImportSymbolCompletionData> > () : null;
var typeDict = new Dictionary <INamespaceSymbol, HashSet <string> > ();
while (stack.Count > 0)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
var current = stack.Pop();
if (current is INamespaceSymbol currentNs)
{
var currentNsName = currentNs.GetFullName();
if (usedNamespaces.Contains(currentNsName) ||
enclosingNamespaceName == currentNsName ||
(enclosingNamespaceName.StartsWith(currentNsName, StringComparison.Ordinal) &&
enclosingNamespaceName [currentNsName.Length] == '.'))
{
foreach (var member in currentNs.GetNamespaceMembers())
{
stack.Push(member);
}
}
else
{
foreach (var member in currentNs.GetMembers())
{
stack.Push(member);
}
}
continue;
}
if (current is INamedTypeSymbol type)
{
if (type.IsImplicitClass || type.IsScriptClass)
{
continue;
}
if (type.DeclaredAccessibility != Accessibility.Public)
{
if (type.DeclaredAccessibility != Accessibility.Internal)
{
continue;
}
if (!type.IsAccessibleWithin(semanticModel.Compilation.Assembly))
{
continue;
}
}
if (extensionMethodImport)
{
if (type.MightContainExtensionMethods)
{
AddImportExtensionMethodCompletionData(result, ctx, type, extensionMethodReceiverType, extMethodDict);
}
}
else
{
if (!typeDict.TryGetValue(type.ContainingNamespace, out var existingTypeHashSet))
{
typeDict.Add(type.ContainingNamespace, existingTypeHashSet = new HashSet <string> ());
}
if (!existingTypeHashSet.Contains(type.Name))
{
result.Add(new ImportSymbolCompletionData(this, ctx, type, false));
existingTypeHashSet.Add(type.Name);
}
}
}
}
}
} catch (Exception e) {
LoggingService.LogError("Exception while AddImportCompletionData", e);
}
}
internal void AddImportCompletionData(CSharpSyntaxContext ctx, CompletionDataList result, SemanticModel semanticModel, int position, CancellationToken cancellationToken = default(CancellationToken))
{
if (result.Count == 0)
{
return;
}
var root = semanticModel.SyntaxTree.GetRoot();
var node = root.FindNode(TextSpan.FromBounds(position, position));
var syntaxTree = root.SyntaxTree;
if (syntaxTree.IsInNonUserCode(position, cancellationToken) ||
syntaxTree.GetContainingTypeOrEnumDeclaration(position, cancellationToken) is EnumDeclarationSyntax ||
syntaxTree.IsPreProcessorDirectiveContext(position, cancellationToken))
{
return;
}
var extensionMethodImport = syntaxTree.IsRightOfDotOrArrowOrColonColon(position, cancellationToken);
ITypeSymbol extensionType = null;
if (extensionMethodImport)
{
var memberAccess = ctx.TargetToken.Parent as MemberAccessExpressionSyntax;
if (memberAccess != null)
{
var symbolInfo = ctx.SemanticModel.GetSymbolInfo(memberAccess.Expression);
if (symbolInfo.Symbol.Kind == SymbolKind.NamedType)
{
return;
}
extensionType = ctx.SemanticModel.GetTypeInfo(memberAccess.Expression).Type;
if (extensionType == null)
{
return;
}
}
else
{
return;
}
}
var tokenLeftOfPosition = syntaxTree.FindTokenOnLeftOfPosition(position, cancellationToken);
if (extensionMethodImport ||
syntaxTree.IsGlobalStatementContext(position, cancellationToken) ||
syntaxTree.IsExpressionContext(position, tokenLeftOfPosition, true, cancellationToken) ||
syntaxTree.IsStatementContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsTypeContext(position, cancellationToken) ||
syntaxTree.IsTypeDeclarationContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsMemberDeclarationContext(position, tokenLeftOfPosition, cancellationToken) ||
syntaxTree.IsLabelContext(position, cancellationToken))
{
var usedNamespaces = new HashSet <string> ();
foreach (var un in semanticModel.GetUsingNamespacesInScope(node))
{
usedNamespaces.Add(un.GetFullName());
}
var enclosingNamespaceName = semanticModel.GetEnclosingNamespace(position, cancellationToken).GetFullName();
var stack = new Stack <INamespaceOrTypeSymbol> ();
foreach (var member in semanticModel.Compilation.GlobalNamespace.GetNamespaceMembers())
{
stack.Push(member);
}
var extMethodDict = extensionMethodImport ? new Dictionary <INamespaceSymbol, List <ImportSymbolCompletionData> > () : null;
var typeDict = new Dictionary <INamespaceSymbol, HashSet <string> > ();
while (stack.Count > 0)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
var current = stack.Pop();
var currentNs = current as INamespaceSymbol;
if (currentNs != null)
{
var currentNsName = currentNs.GetFullName();
if (usedNamespaces.Contains(currentNsName) ||
enclosingNamespaceName == currentNsName ||
(enclosingNamespaceName.StartsWith(currentNsName, StringComparison.Ordinal) &&
enclosingNamespaceName [currentNsName.Length] == '.'))
{
foreach (var member in currentNs.GetNamespaceMembers())
{
stack.Push(member);
}
}
else
{
foreach (var member in currentNs.GetMembers())
{
stack.Push(member);
}
}
}
else
{
var type = (INamedTypeSymbol)current;
if (type.IsImplicitClass || type.IsScriptClass)
{
continue;
}
if (type.DeclaredAccessibility != Accessibility.Public)
{
if (type.DeclaredAccessibility != Accessibility.Internal)
{
continue;
}
if (!type.IsAccessibleWithin(semanticModel.Compilation.Assembly))
{
continue;
}
}
if (extensionMethodImport)
{
if (!type.MightContainExtensionMethods)
{
continue;
}
foreach (var extMethod in type.GetMembers().OfType <IMethodSymbol> ().Where(method => method.IsExtensionMethod))
{
var reducedMethod = extMethod.ReduceExtensionMethod(extensionType);
if (reducedMethod != null)
{
List <ImportSymbolCompletionData> importSymbolList;
if (!extMethodDict.TryGetValue(type.ContainingNamespace, out importSymbolList))
{
extMethodDict.Add(type.ContainingNamespace, importSymbolList = new List <ImportSymbolCompletionData> ());
}
var newData = new ImportSymbolCompletionData(this, reducedMethod, false);
var existingItem = importSymbolList.FirstOrDefault(data => data.Symbol.Name == extMethod.Name);
if (existingItem != null)
{
existingItem.AddOverload(newData);
}
else
{
result.Add(newData);
importSymbolList.Add(newData);
}
}
}
}
else
{
HashSet <string> existingTypeHashSet;
if (!typeDict.TryGetValue(type.ContainingNamespace, out existingTypeHashSet))
{
typeDict.Add(type.ContainingNamespace, existingTypeHashSet = new HashSet <string> ());
}
if (!existingTypeHashSet.Contains(type.Name))
{
result.Add(new ImportSymbolCompletionData(this, type, false));
existingTypeHashSet.Add(type.Name);
}
}
}
}
}
}
