private static async Task <T> FindAsync <T>(Solution solution, DocumentId documentId, SyntaxNode syntaxNode,
Func <CodeLensFindReferencesProgress, Task <T> > onResults, Func <CodeLensFindReferencesProgress, Task <T> > onCapped,
int searchCap, CancellationToken cancellationToken) where T : class
{
var document = solution.GetDocument(documentId);
if (document == null)
{
return(null);
}
var cacheService = solution.Services.CacheService;
var caches = solution.GetProjectDependencyGraph().GetProjectsThatTransitivelyDependOnThisProject(document.Project.Id).Select(pid => cacheService?.EnableCaching(pid)).ToList();
try
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
var symbol = semanticModel.GetDeclaredSymbol(syntaxNode, cancellationToken);
if (symbol == null)
{
return(null);
}
using (var progress = new CodeLensFindReferencesProgress(symbol, syntaxNode, searchCap, cancellationToken))
{
try
{
await SymbolFinder.FindReferencesAsync(symbol, solution, progress, null,
progress.CancellationToken).ConfigureAwait(false);
return(await onResults(progress).ConfigureAwait(false));
}
catch (OperationCanceledException)
{
if (onCapped != null && progress.SearchCapReached)
{
// search was cancelled, and it was cancelled by us because a cap was reached.
return(await onCapped(progress).ConfigureAwait(false));
}
// search was cancelled, but not because of cap.
// this always throws.
throw;
}
}
}
finally
{
caches.WhereNotNull().Do(c => c.Dispose());
}
}
private async Task <T> FindAsync <T>(Solution solution, DocumentId documentId, SyntaxNode syntaxNode,
Func <CodeLensFindReferencesProgress, Task <T> > onResults, Func <CodeLensFindReferencesProgress, Task <T> > onCapped,
int searchCap, CancellationToken cancellationToken) where T : class
{
var document = solution.GetDocument(documentId);
if (document == null)
{
return(null);
}
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (semanticModel == null)
{
return(null);
}
cancellationToken.ThrowIfCancellationRequested();
var symbol = semanticModel.GetDeclaredSymbol(syntaxNode, cancellationToken);
if (symbol == null)
{
return(null);
}
using (var progress = new CodeLensFindReferencesProgress(symbol, syntaxNode, searchCap, cancellationToken))
{
try
{
await SymbolFinder.FindReferencesAsync(symbol, solution, progress, null,
progress.CancellationToken).ConfigureAwait(false);
return(await onResults(progress).ConfigureAwait(false));
}
catch (OperationCanceledException)
{
if (onCapped != null && progress.SearchCapReached)
{
// search was cancelled, and it was cancelled by us because a cap was reached.
return(await onCapped(progress).ConfigureAwait(false));
}
// search was cancelled, but not because of cap.
// this always throws.
throw;
}
}
}
public async Task<ReferenceCount?> GetReferenceCountAsync(Solution solution, DocumentId documentId, SyntaxNode syntaxNode, int maxSearchResults, CancellationToken cancellationToken)
{
var document = solution.GetDocument(documentId);
if (document == null)
{
return null;
}
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (semanticModel == null)
{
return null;
}
cancellationToken.ThrowIfCancellationRequested();
var symbol = semanticModel.GetDeclaredSymbol(syntaxNode, cancellationToken);
if (symbol == null)
{
return null;
}
using (var progress = new CodeLensFindReferencesProgress(symbol, syntaxNode, maxSearchResults, cancellationToken))
{
try
{
await SymbolFinder.FindReferencesAsync(symbol, solution, progress, null,
progress.CancellationToken).ConfigureAwait(false);
return new ReferenceCount(
progress.SearchCap > 0
? Math.Min(progress.ReferencesCount, progress.SearchCap)
: progress.ReferencesCount, progress.SearchCapReached);
}
catch (OperationCanceledException)
{
if (progress.SearchCapReached)
{
// search was cancelled, and it was cancelled by us because a cap was reached.
return new ReferenceCount(progress.SearchCap, isCapped: true);
}
// search was cancelled, but not because of cap.
// this always throws.
throw;
}
}
}
public async Task<IEnumerable<ReferenceLocationDescriptor>> FindReferenceLocationsAsync(Solution solution, DocumentId documentId, SyntaxNode syntaxNode, CancellationToken cancellationToken)
{
var document = solution.GetDocument(documentId);
if (document == null)
{
return null;
}
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (semanticModel == null)
{
return null;
}
cancellationToken.ThrowIfCancellationRequested();
var symbol = semanticModel.GetDeclaredSymbol(syntaxNode, cancellationToken);
if (symbol == null)
{
return null;
}
using (var progress = new CodeLensFindReferencesProgress(symbol, syntaxNode, searchCap: 0, cancellationToken: cancellationToken))
{
await SymbolFinder.FindReferencesAsync(symbol, solution, progress, null,
progress.CancellationToken).ConfigureAwait(false);
var referenceTasks = progress.Locations
.Where(location => location.Kind != LocationKind.MetadataFile && location.Kind != LocationKind.None)
.Distinct(LocationComparer.Instance)
.Select(
location =>
GetDescriptorOfEnclosingSymbolAsync(solution, location, cancellationToken))
.ToArray();
await Task.WhenAll(referenceTasks).ConfigureAwait(false);
return referenceTasks.Select(task => task.Result);
}
}