public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var items = await this.GetItemsAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
var builder = await this.GetBuilderAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
if (items == null && builder == null)
{
return;
}
if (items != null)
{
foreach (var item in items)
{
context.AddItem(item);
}
}
if (builder != null)
{
context.RegisterBuilder(builder);
}
var isExclusive = await this.IsExclusiveAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
context.MakeExclusive(isExclusive);
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var options = context.Options;
var cancellationToken = context.CancellationToken;
if (!options.GetOption(CompletionOptions.IncludeKeywords, document.Project.Language))
{
return;
}
using (Logger.LogBlock(FunctionId.Completion_KeywordCompletionProvider_GetItemsWorker, cancellationToken))
{
var keywords = await document.GetUnionItemsFromDocumentAndLinkedDocumentsAsync(
s_comparer,
(doc, ct) => RecommendKeywordsAsync(doc, position, ct),
cancellationToken).ConfigureAwait(false);
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = this.GetTextChangeSpan(text, position);
foreach (var keyword in keywords)
{
context.AddItem(CreateItem(keyword, filterSpan));
}
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var triggerInfo = context.TriggerInfo;
var options = context.Options;
var cancellationToken = context.CancellationToken;
CompletionItem builder;
if (options.GetOption(CompletionOptions.AlwaysShowBuilder))
{
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
builder = this.CreateEmptyBuilder(text, position);
}
else
{
builder = await this.GetBuilderAsync(document, position, triggerInfo, cancellationToken).ConfigureAwait(false);
}
if (builder != null)
{
context.RegisterBuilder(builder);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var options = context.Options;
var cancellationToken = context.CancellationToken;
using (Logger.LogBlock(FunctionId.Completion_SnippetCompletionProvider_GetItemsWorker_CSharp, cancellationToken))
{
// TODO (https://github.com/dotnet/roslyn/issues/5107): Enable in Interactive.
var workspace = document.Project.Solution.Workspace;
if (!workspace.CanApplyChange(ApplyChangesKind.ChangeDocument) ||
workspace.Kind == WorkspaceKind.Debugger ||
workspace.Kind == WorkspaceKind.Interactive)
{
return;
}
if (!options.GetOption(CSharpCompletionOptions.IncludeSnippets))
{
return;
}
var snippetCompletionItems = await document.GetUnionItemsFromDocumentAndLinkedDocumentsAsync(
UnionCompletionItemComparer.Instance,
(d, c) => GetSnippetsForDocumentAsync(d, position, workspace, c),
cancellationToken).ConfigureAwait(false);
context.AddItems(snippetCompletionItems);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var items = await this.GetItemsAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
var builder = await this.GetBuilderAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
if (items == null && builder == null)
{
return;
}
if (items != null)
{
foreach (var item in items)
{
context.AddItem(item);
}
}
if (builder != null)
{
context.RegisterBuilder(builder);
}
var isExclusive = await this.IsExclusiveAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
context.MakeExclusive(isExclusive);
}
internal static CompletionList GetCompletionList(CompletionListProvider provider, Document document, int position, CompletionTriggerInfo triggerInfo)
{
var context = new CompletionListContext(document, position, triggerInfo, CancellationToken.None);
provider.ProduceCompletionListAsync(context).Wait();
return(new CompletionList(context.GetItems(), context.Builder, context.IsExclusive));
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var builder = await this.GetBuilderAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
if (builder != null)
{
context.RegisterBuilder(builder);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
// first try to get the #r string literal token. If we couldn't, then we're not in a #r
// reference directive and we immediately bail.
SyntaxToken stringLiteral;
if (!TryGetStringLiteralToken(tree, position, out stringLiteral, cancellationToken))
{
return;
}
var textChangeSpan = GetTextChangeSpan(stringLiteral, position);
var gacHelper = new GlobalAssemblyCacheCompletionHelper(this, textChangeSpan, ItemRules.Instance);
var referenceResolver = document.Project.CompilationOptions.MetadataReferenceResolver;
// TODO: https://github.com/dotnet/roslyn/issues/5263
// Avoid dependency on a specific resolvers.
// The search paths should be provided by specialized workspaces:
// - InteractiveWorkspace for interactive window
// - ScriptWorkspace for loose .csx files (we don't have such workspace today)
ImmutableArray <string> searchPaths;
RuntimeMetadataReferenceResolver rtResolver;
WorkspaceMetadataFileReferenceResolver workspaceResolver;
if ((rtResolver = referenceResolver as RuntimeMetadataReferenceResolver) != null)
{
searchPaths = rtResolver.PathResolver.SearchPaths;
}
else if ((workspaceResolver = referenceResolver as WorkspaceMetadataFileReferenceResolver) != null)
{
searchPaths = workspaceResolver.PathResolver.SearchPaths;
}
else
{
return;
}
var fileSystemHelper = new FileSystemCompletionHelper(
this, textChangeSpan,
new CurrentWorkingDirectoryDiscoveryService(Directory.GetCurrentDirectory()),
Microsoft.CodeAnalysis.Glyph.OpenFolder,
Microsoft.CodeAnalysis.Glyph.Assembly, searchPaths, new[] { ".dll", ".exe" }, path => path.Contains(","), ItemRules.Instance);
var pathThroughLastSlash = GetPathThroughLastSlash(stringLiteral, position);
var documentPath = document.Project.IsSubmission ? null : document.FilePath;
context.AddItems(gacHelper.GetItems(pathThroughLastSlash, documentPath));
context.AddItems(fileSystemHelper.GetItems(pathThroughLastSlash, documentPath));
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var syntaxTree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (syntaxTree.IsInNonUserCode(position, cancellationToken))
{
return;
}
var token = syntaxTree.FindTokenOnLeftOfPosition(position, cancellationToken);
token = token.GetPreviousTokenIfTouchingWord(position);
if (!token.IsKind(SyntaxKind.OpenParenToken, SyntaxKind.CommaToken))
{
return;
}
var attributeArgumentList = token.Parent as AttributeArgumentListSyntax;
var attributeSyntax = token.Parent.Parent as AttributeSyntax;
if (attributeSyntax == null || attributeArgumentList == null)
{
return;
}
if (IsAfterNameColonArgument(token) || IsAfterNameEqualsArgument(token))
{
context.MakeExclusive(true);
}
// We actually want to collect two sets of named parameters to present the user. The
// normal named parameters that come from the attribute constructors. These will be
// presented like "foo:". And also the named parameters that come from the writable
// fields/properties in the attribute. These will be presented like "bar =".
var existingNamedParameters = GetExistingNamedParameters(attributeArgumentList, position);
var workspace = document.Project.Solution.Workspace;
var semanticModel = await document.GetSemanticModelForNodeAsync(attributeSyntax, cancellationToken).ConfigureAwait(false);
var nameColonItems = await GetNameColonItemsAsync(workspace, semanticModel, position, token, attributeSyntax, existingNamedParameters, cancellationToken).ConfigureAwait(false);
var nameEqualsItems = await GetNameEqualsItemsAsync(workspace, semanticModel, position, token, attributeSyntax, existingNamedParameters, cancellationToken).ConfigureAwait(false);
context.AddItems(nameEqualsItems);
// If we're after a name= parameter, then we only want to show name= parameters.
// Otherwise, show name: parameters too.
if (!IsAfterNameEqualsArgument(token))
{
context.AddItems(nameColonItems);
}
}
internal static CompletionList GetCompletionList(CompletionListProvider provider, Document document, int position, CompletionTriggerInfo triggerInfo, OptionSet options = null)
{
options = options ?? document.Project.Solution.Workspace.Options;
var context = new CompletionListContext(document, position, triggerInfo, options, CancellationToken.None);
provider.ProduceCompletionListAsync(context).Wait();
return(new CompletionList(context.GetItems(), context.Builder, context.IsExclusive));
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var builder = await this.GetBuilderAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
if (builder != null)
{
context.RegisterBuilder(builder);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var workspace = document.Project.Solution.Workspace;
var semanticModel = await document.GetSemanticModelForSpanAsync(new TextSpan(position, length : 0), cancellationToken).ConfigureAwait(false);
var typeAndLocation = GetInitializedType(document, semanticModel, position, cancellationToken);
if (typeAndLocation == null)
{
return;
}
var initializedType = typeAndLocation.Item1 as INamedTypeSymbol;
var initializerLocation = typeAndLocation.Item2;
if (initializedType == null)
{
return;
}
if (await IsExclusiveAsync(document, position, cancellationToken).ConfigureAwait(false))
{
context.MakeExclusive(true);
}
var enclosing = semanticModel.GetEnclosingNamedTypeOrAssembly(position, cancellationToken);
// Find the members that can be initialized. If we have a NamedTypeSymbol, also get the overridden members.
IEnumerable <ISymbol> members = semanticModel.LookupSymbols(position, initializedType);
members = members.Where(m => IsInitializable(m, initializedType) &&
m.CanBeReferencedByName &&
IsLegalFieldOrProperty(m, enclosing) &&
!m.IsImplicitlyDeclared);
// Filter out those members that have already been typed
var alreadyTypedMembers = GetInitializedMembers(semanticModel.SyntaxTree, position, cancellationToken);
var uninitializedMembers = members.Where(m => !alreadyTypedMembers.Contains(m.Name));
uninitializedMembers = uninitializedMembers.Where(m => m.IsEditorBrowsable(document.ShouldHideAdvancedMembers(), semanticModel.Compilation));
var text = await semanticModel.SyntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = GetTextChangeSpan(text, position);
foreach (var uninitializedMember in uninitializedMembers)
{
context.AddItem(CreateItem(
workspace,
uninitializedMember.Name,
filterSpan,
CommonCompletionUtilities.CreateDescriptionFactory(workspace, semanticModel, initializerLocation.SourceSpan.Start, uninitializedMember),
uninitializedMember.GetGlyph()));
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var state = new ItemGetter(this, context.Document, context.Position, context.CancellationToken);
var items = await state.GetItemsAsync().ConfigureAwait(false);
if (items?.Any() == true)
{
context.MakeExclusive(true);
context.AddItems(items);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var workspace = document.Project.Solution.Workspace;
var semanticModel = await document.GetSemanticModelForSpanAsync(new TextSpan(position, length: 0), cancellationToken).ConfigureAwait(false);
var typeAndLocation = GetInitializedType(document, semanticModel, position, cancellationToken);
if (typeAndLocation == null)
{
return;
}
var initializedType = typeAndLocation.Item1 as INamedTypeSymbol;
var initializerLocation = typeAndLocation.Item2;
if (initializedType == null)
{
return;
}
if (await IsExclusiveAsync(document, position, cancellationToken).ConfigureAwait(false))
{
context.MakeExclusive(true);
}
var enclosing = semanticModel.GetEnclosingNamedTypeOrAssembly(position, cancellationToken);
// Find the members that can be initialized. If we have a NamedTypeSymbol, also get the overridden members.
IEnumerable<ISymbol> members = semanticModel.LookupSymbols(position, initializedType);
members = members.Where(m => IsInitializable(m, initializedType) &&
m.CanBeReferencedByName &&
IsLegalFieldOrProperty(m, enclosing) &&
!m.IsImplicitlyDeclared);
// Filter out those members that have already been typed
var alreadyTypedMembers = GetInitializedMembers(semanticModel.SyntaxTree, position, cancellationToken);
var uninitializedMembers = members.Where(m => !alreadyTypedMembers.Contains(m.Name));
uninitializedMembers = uninitializedMembers.Where(m => m.IsEditorBrowsable(document.ShouldHideAdvancedMembers(), semanticModel.Compilation));
var text = await semanticModel.SyntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = GetTextChangeSpan(text, position);
foreach (var uninitializedMember in uninitializedMembers)
{
context.AddItem(CreateItem(
workspace,
uninitializedMember.Name,
filterSpan,
CommonCompletionUtilities.CreateDescriptionFactory(workspace, semanticModel, initializerLocation.SourceSpan.Start, uninitializedMember),
uninitializedMember.GetGlyph()));
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var triggerInfo = context.TriggerInfo;
var cancellationToken = context.CancellationToken;
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var items = GetItems(text, position, triggerInfo, cancellationToken);
context.AddItems(items);
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
if (!context.Options.GetOption(CompletionOptions.ShowXmlDocCommentCompletion))
{
return;
}
var items = await GetItemsWorkerAsync(context.Document, context.Position, context.TriggerInfo, context.CancellationToken).ConfigureAwait(false);
if (items != null)
{
context.AddItems(items);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var options = context.Options;
var cancellationToken = context.CancellationToken;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (!tree.IsEntirelyWithinCrefSyntax(position, cancellationToken))
{
return;
}
var token = tree.FindTokenOnLeftOfPosition(position, cancellationToken)
.GetPreviousTokenIfTouchingWord(position);
// To get a Speculative SemanticModel (which is much faster), we need to
// walk up to the node the DocumentationTrivia is attached to.
var parentNode = token.Parent.FirstAncestorOrSelf <DocumentationCommentTriviaSyntax>()?.ParentTrivia.Token.Parent;
if (parentNode == null)
{
return;
}
var semanticModel = await document.GetSemanticModelForNodeAsync(parentNode, cancellationToken).ConfigureAwait(false);
var symbols = GetSymbols(token, semanticModel, cancellationToken);
symbols = symbols.FilterToVisibleAndBrowsableSymbols(options.GetOption(CompletionOptions.HideAdvancedMembers, semanticModel.Language), semanticModel.Compilation);
if (!symbols.Any())
{
return;
}
context.MakeExclusive(true);
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = GetTextChangeSpan(text, position);
var items = CreateCompletionItems(document.Project.Solution.Workspace, semanticModel, symbols, token, filterSpan);
context.AddItems(items);
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (tree.IsInNonUserCode(position, cancellationToken))
{
return;
}
var targetToken = tree
.FindTokenOnLeftOfPosition(position, cancellationToken)
.GetPreviousTokenIfTouchingWord(position);
if (targetToken.IsKind(SyntaxKind.AliasKeyword) && targetToken.Parent.IsKind(SyntaxKind.ExternAliasDirective))
{
var compilation = await document.Project.GetCompilationAsync(cancellationToken).ConfigureAwait(false);
var aliases = compilation.ExternalReferences.SelectMany(r => r.Properties.Aliases).ToSet();
if (aliases.Any())
{
var root = await tree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var usedAliases = root.ChildNodes().OfType <ExternAliasDirectiveSyntax>()
.Where(e => !e.Identifier.IsMissing)
.Select(e => e.Identifier.ValueText);
aliases.RemoveRange(usedAliases);
aliases.Remove(MetadataReferenceProperties.GlobalAlias);
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = CompletionUtilities.GetTextChangeSpan(text, position);
foreach (var alias in aliases)
{
context.AddItem(new CompletionItem(this, alias, filterSpan, glyph: Glyph.Namespace));
}
}
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var showSpeculativeT = await document.IsValidContextForDocumentOrLinkedDocumentsAsync(
(doc, ct) => ShouldShowSpeculativeTCompletionItemAsync(doc, position, ct),
cancellationToken).ConfigureAwait(false);
if (showSpeculativeT)
{
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = this.GetTextChangeSpan(text, position);
const string T = "T";
context.AddItem(new CompletionItem(this, T, filterSpan, descriptionFactory: null, glyph: Glyph.TypeParameter));
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
if (document != null && document.SourceCodeKind == SourceCodeKind.Interactive)
{
// the provider might be invoked in non-interactive context:
Workspace ws;
if (Workspace.TryGetWorkspace(document.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken).Container, out ws))
{
var workspace = ws as InteractiveWorkspace;
if (workspace != null)
{
var window = workspace.Engine.CurrentWindow;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (tree.IsBeforeFirstToken(position, cancellationToken) &&
tree.IsPreProcessorKeywordContext(position, cancellationToken))
{
var filterSpan = await this.GetTextChangeSpanAsync(document, position, cancellationToken).ConfigureAwait(false);
IInteractiveWindowCommands commands = window.GetInteractiveCommands();
if (commands != null)
{
foreach (var command in commands.GetCommands())
{
foreach (var commandName in command.Names)
{
context.AddItem(new CompletionItem(
this, commandName, filterSpan, c => Task.FromResult(command.Description.ToSymbolDisplayParts()), glyph: Glyph.Intrinsic));
}
}
}
}
}
}
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
// the provider might be invoked in non-interactive context:
Workspace ws;
SourceText sourceText = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
if (Workspace.TryGetWorkspace(sourceText.Container, out ws))
{
var workspace = ws as InteractiveWorkspace;
if (workspace != null)
{
var window = workspace.Engine.CurrentWindow;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (await ShouldDisplayCommandCompletionsAsync(tree, position, cancellationToken).ConfigureAwait(false))
{
var filterSpan = await this.GetTextChangeSpanAsync(document, position, cancellationToken).ConfigureAwait(false);
IInteractiveWindowCommands commands = window.GetInteractiveCommands();
if (commands != null)
{
foreach (var command in commands.GetCommands())
{
foreach (var commandName in command.Names)
{
string completion = GetCompletionString(commandName);
context.AddItem(new CompletionItem(
this, completion, filterSpan, c => Task.FromResult(command.Description.ToSymbolDisplayParts()), glyph: Glyph.Intrinsic));
}
}
}
}
}
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var triggerInfo = context.TriggerInfo;
var options = context.Options;
var cancellationToken = context.CancellationToken;
// If we were triggered by typing a character, then do a semantic check to make sure
// we're still applicable. If not, then return immediately.
if (triggerInfo.TriggerReason == CompletionTriggerReason.TypeCharCommand)
{
var isSemanticTriggerCharacter = await IsSemanticTriggerCharacterAsync(document, position - 1, cancellationToken).ConfigureAwait(false);
if (!isSemanticTriggerCharacter)
{
return;
}
}
if (IsExclusive())
{
context.MakeExclusive(true);
}
using (Logger.LogBlock(FunctionId.Completion_SymbolCompletionProvider_GetItemsWorker, cancellationToken))
{
var regularItems = await GetItemsWorkerAsync(document, position, triggerInfo, options, preselect : false, cancellationToken : cancellationToken).ConfigureAwait(false);
context.AddItems(regularItems);
var preselectedItems = await GetItemsWorkerAsync(document, position, triggerInfo, options, preselect : true, cancellationToken : cancellationToken).ConfigureAwait(false);
context.AddItems(preselectedItems);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var triggerInfo = context.TriggerInfo;
var options = context.Options;
var cancellationToken = context.CancellationToken;
CompletionItem builder;
if (options.GetOption(CompletionOptions.AlwaysShowBuilder))
{
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
builder = this.CreateEmptyBuilder(text, position);
}
else
{
builder = await this.GetBuilderAsync(document, position, triggerInfo, cancellationToken).ConfigureAwait(false);
}
if (builder != null)
{
context.RegisterBuilder(builder);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
DeclarationModifiers modifiers;
SyntaxToken token;
if (!IsPartialCompletionContext(tree, position, cancellationToken, out modifiers, out token))
{
return;
}
var items = await CreatePartialItemsAsync(document, position, modifiers, token, cancellationToken).ConfigureAwait(false);
if (items?.Any() == true)
{
context.MakeExclusive(true);
context.AddItems(items);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var options = context.Options;
var cancellationToken = context.CancellationToken;
var span = new TextSpan(position, length: 0);
var semanticModel = await document.GetSemanticModelForSpanAsync(span, cancellationToken).ConfigureAwait(false);
var syntaxTree = semanticModel.SyntaxTree;
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
var semanticFacts = document.GetLanguageService <ISemanticFactsService>();
if (syntaxFacts.IsInNonUserCode(syntaxTree, position, cancellationToken) ||
semanticFacts.IsPreProcessorDirectiveContext(semanticModel, position, cancellationToken))
{
return;
}
if (!syntaxTree.IsRightOfDotOrArrowOrColonColon(position, cancellationToken))
{
return;
}
var node = syntaxTree.FindTokenOnLeftOfPosition(position, cancellationToken)
.GetPreviousTokenIfTouchingWord(position)
.Parent;
if (node.Kind() != SyntaxKind.ExplicitInterfaceSpecifier)
{
return;
}
// Bind the interface name which is to the left of the dot
var name = ((ExplicitInterfaceSpecifierSyntax)node).Name;
var symbol = semanticModel.GetSymbolInfo(name, cancellationToken).Symbol as ITypeSymbol;
if (symbol?.TypeKind != TypeKind.Interface)
{
return;
}
var members = semanticModel.LookupSymbols(
position: name.SpanStart,
container: symbol)
.Where(s => !s.IsStatic)
.FilterToVisibleAndBrowsableSymbols(options.GetOption(CompletionOptions.HideAdvancedMembers, semanticModel.Language), semanticModel.Compilation);
// We're going to create a entry for each one, including the signature
var namePosition = name.SpanStart;
var text = await syntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
var textChangeSpan = CompletionUtilities.GetTextChangeSpan(text, position);
foreach (var member in members)
{
var displayText = member.ToMinimalDisplayString(semanticModel, namePosition, s_signatureDisplayFormat);
var insertionText = displayText;
context.AddItem(new SymbolCompletionItem(
this,
displayText,
insertionText: insertionText,
filterSpan: textChangeSpan,
position: position,
symbols: new List <ISymbol> {
member
},
context: CSharpSyntaxContext.CreateContext(document.Project.Solution.Workspace, semanticModel, position, cancellationToken),
rules: ItemRules.Instance));
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var triggerInfo = context.TriggerInfo;
var options = context.Options;
var cancellationToken = context.CancellationToken;
// If we were triggered by typing a character, then do a semantic check to make sure
// we're still applicable. If not, then return immediately.
if (triggerInfo.TriggerReason == CompletionTriggerReason.TypeCharCommand)
{
var isSemanticTriggerCharacter = await IsSemanticTriggerCharacterAsync(document, position - 1, cancellationToken).ConfigureAwait(false);
if (!isSemanticTriggerCharacter)
{
return;
}
}
if (IsExclusive())
{
context.MakeExclusive(true);
}
using (Logger.LogBlock(FunctionId.Completion_SymbolCompletionProvider_GetItemsWorker, cancellationToken))
{
var regularItems = await GetItemsWorkerAsync(document, position, triggerInfo, options, preselect: false, cancellationToken: cancellationToken).ConfigureAwait(false);
context.AddItems(regularItems);
var preselectedItems = await GetItemsWorkerAsync(document, position, triggerInfo, options, preselect: true, cancellationToken: cancellationToken).ConfigureAwait(false);
context.AddItems(preselectedItems);
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
var document = context.Document;
var position = context.Position;
var cancellationToken = context.CancellationToken;
var syntaxTree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (syntaxTree.IsInNonUserCode(position, cancellationToken))
{
return;
}
var token = syntaxTree
.FindTokenOnLeftOfPosition(position, cancellationToken)
.GetPreviousTokenIfTouchingWord(position);
if (!token.IsKind(SyntaxKind.OpenParenToken, SyntaxKind.OpenBracketToken, SyntaxKind.CommaToken))
{
return;
}
var argumentList = token.Parent as BaseArgumentListSyntax;
if (argumentList == null)
{
return;
}
var semanticModel = await document.GetSemanticModelForNodeAsync(argumentList, cancellationToken).ConfigureAwait(false);
var parameterLists = GetParameterLists(semanticModel, position, argumentList.Parent, cancellationToken);
if (parameterLists == null)
{
return;
}
var existingNamedParameters = GetExistingNamedParameters(argumentList, position);
parameterLists = parameterLists.Where(pl => IsValid(pl, existingNamedParameters));
var unspecifiedParameters = parameterLists.SelectMany(pl => pl)
.Where(p => !existingNamedParameters.Contains(p.Name))
.Distinct(this);
if (!unspecifiedParameters.Any())
{
return;
}
if (token.IsMandatoryNamedParameterPosition())
{
context.MakeExclusive(true);
}
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var filterSpan = CompletionUtilities.GetTextChangeSpan(text, position);
var workspace = document.Project.Solution.Workspace;
foreach (var parameter in unspecifiedParameters)
{
// Note: the filter text does not include the ':'. We want to ensure that if
// the user types the name exactly (up to the colon) that it is selected as an
// exact match.
var escapedName = parameter.Name.ToIdentifierToken().ToString();
context.AddItem(new CompletionItem(
this,
escapedName + ColonString,
filterSpan,
CommonCompletionUtilities.CreateDescriptionFactory(workspace, semanticModel, token.SpanStart, parameter),
parameter.GetGlyph(),
sortText: parameter.Name,
filterText: escapedName,
rules: ItemRules.Instance));
}
}
public override async Task ProduceCompletionListAsync(CompletionListContext context)
{
try
{
var document = context.Document;
var position = context.Position;
var options = context.Options;
var cancellationToken = context.CancellationToken;
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (tree.IsInNonUserCode(position, cancellationToken))
{
return;
}
var token = tree.FindTokenOnLeftOfPosition(position, cancellationToken);
if (token.IsMandatoryNamedParameterPosition())
{
return;
}
var typeInferenceService = document.GetLanguageService <ITypeInferenceService>();
var span = new TextSpan(position, 0);
var semanticModel = await document.GetSemanticModelForSpanAsync(span, cancellationToken).ConfigureAwait(false);
var type = typeInferenceService.InferType(semanticModel, position,
objectAsDefault: true,
cancellationToken: cancellationToken);
// If we have a Nullable<T>, unwrap it.
if (type.OriginalDefinition.SpecialType == SpecialType.System_Nullable_T)
{
type = type.GetTypeArguments().FirstOrDefault();
if (type == null)
{
return;
}
}
if (type.TypeKind != TypeKind.Enum)
{
type = GetCompletionListType(type, semanticModel.GetEnclosingNamedType(position, cancellationToken), semanticModel.Compilation);
if (type == null)
{
return;
}
}
if (!type.IsEditorBrowsable(options.GetOption(CompletionOptions.HideAdvancedMembers, semanticModel.Language), semanticModel.Compilation))
{
return;
}
// Does type have any aliases?
ISymbol alias = await type.FindApplicableAlias(position, semanticModel, cancellationToken).ConfigureAwait(false);
var displayService = document.GetLanguageService <ISymbolDisplayService>();
var displayText = alias != null
? alias.Name
: displayService.ToMinimalDisplayString(semanticModel, position, type);
var workspace = document.Project.Solution.Workspace;
var text = await semanticModel.SyntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
var textChangeSpan = CompletionUtilities.GetTextChangeSpan(text, position);
var item = new CompletionItem(
this,
displayText: displayText,
filterSpan: textChangeSpan,
descriptionFactory: CommonCompletionUtilities.CreateDescriptionFactory(workspace, semanticModel, position, alias ?? type),
glyph: (alias ?? type).GetGlyph(),
preselect: true,
rules: ItemRules.Instance);
context.AddItem(item);
}
catch (Exception e) when(FatalError.ReportUnlessCanceled(e))
{
throw ExceptionUtilities.Unreachable;
}
}
