private async Task <Project> UpdateDocumentsAsync(
Project project,
IEnumerable <TextDocumentState> existingTextDocumentStates,
ChecksumCollection oldChecksums,
ChecksumCollection newChecksums,
Func <Solution, ImmutableArray <DocumentInfo>, Solution> addDocuments,
Func <Solution, DocumentId, Solution> removeDocument)
{
using var olds = SharedPools.Default <HashSet <Checksum> >().GetPooledObject();
using var news = SharedPools.Default <HashSet <Checksum> >().GetPooledObject();
olds.Object.UnionWith(oldChecksums);
news.Object.UnionWith(newChecksums);
// remove documents that exist in both side
olds.Object.ExceptWith(newChecksums);
news.Object.ExceptWith(oldChecksums);
var oldMap = await GetDocumentMapAsync(existingTextDocumentStates, olds.Object).ConfigureAwait(false);
var newMap = await GetDocumentMapAsync(_assetProvider, news.Object).ConfigureAwait(false);
// added document
ImmutableArray <DocumentInfo> .Builder?lazyDocumentsToAdd = null;
foreach (var(documentId, newDocumentChecksums) in newMap)
{
if (!oldMap.ContainsKey(documentId))
{
lazyDocumentsToAdd ??= ImmutableArray.CreateBuilder <DocumentInfo>();
// we have new document added
var documentInfo = await _assetProvider.CreateDocumentInfoAsync(newDocumentChecksums.Checksum, _cancellationToken).ConfigureAwait(false);
lazyDocumentsToAdd.Add(documentInfo);
}
}
if (lazyDocumentsToAdd != null)
{
project = addDocuments(project.Solution, lazyDocumentsToAdd.ToImmutable()).GetProject(project.Id) !;
}
// changed document
foreach (var(documentId, newDocumentChecksums) in newMap)
{
if (!oldMap.TryGetValue(documentId, out var oldDocumentChecksums))
{
continue;
}
Contract.ThrowIfTrue(oldDocumentChecksums.Checksum == newDocumentChecksums.Checksum);
var document = project.GetDocument(documentId) ?? project.GetAdditionalDocument(documentId) ?? project.GetAnalyzerConfigDocument(documentId);
Contract.ThrowIfNull(document);
project = await UpdateDocumentAsync(document, oldDocumentChecksums, newDocumentChecksums).ConfigureAwait(false);
}
// removed document
foreach (var(documentId, _) in oldMap)
{
if (!newMap.ContainsKey(documentId))
{
// we have a document removed
project = removeDocument(project.Solution, documentId).GetProject(project.Id) !;
}
}
return(project);
}
private async Task <Project> UpdateDocumentsAsync(
Project project,
ProjectStateChecksums projectChecksums,
IEnumerable <TextDocumentState> existingTextDocumentStates,
ChecksumCollection oldChecksums,
ChecksumCollection newChecksums,
Func <Solution, ImmutableArray <DocumentInfo>, Solution> addDocuments,
Func <Solution, ImmutableArray <DocumentId>, Solution> removeDocuments,
CancellationToken cancellationToken)
{
using var olds = SharedPools.Default <HashSet <Checksum> >().GetPooledObject();
using var news = SharedPools.Default <HashSet <Checksum> >().GetPooledObject();
olds.Object.UnionWith(oldChecksums);
news.Object.UnionWith(newChecksums);
// remove documents that exist in both side
olds.Object.ExceptWith(newChecksums);
news.Object.ExceptWith(oldChecksums);
var oldMap = await GetDocumentMapAsync(existingTextDocumentStates, olds.Object, cancellationToken).ConfigureAwait(false);
var newMap = await GetDocumentMapAsync(_assetProvider, news.Object, cancellationToken).ConfigureAwait(false);
// If more than two documents changed during a single update, perform a bulk synchronization on the
// project to avoid large numbers of small synchronization calls during document updates.
// 🔗 https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1365014
if (newMap.Count > 2)
{
await _assetProvider.SynchronizeProjectAssetsAsync(new[] { projectChecksums.Checksum }, cancellationToken).ConfigureAwait(false);
}
// added document
ImmutableArray <DocumentInfo> .Builder?lazyDocumentsToAdd = null;
foreach (var(documentId, newDocumentChecksums) in newMap)
{
if (!oldMap.ContainsKey(documentId))
{
lazyDocumentsToAdd ??= ImmutableArray.CreateBuilder <DocumentInfo>();
// we have new document added
var documentInfo = await _assetProvider.CreateDocumentInfoAsync(newDocumentChecksums.Checksum, cancellationToken).ConfigureAwait(false);
lazyDocumentsToAdd.Add(documentInfo);
}
}
if (lazyDocumentsToAdd != null)
{
project = addDocuments(project.Solution, lazyDocumentsToAdd.ToImmutable()).GetProject(project.Id) !;
}
// changed document
foreach (var(documentId, newDocumentChecksums) in newMap)
{
if (!oldMap.TryGetValue(documentId, out var oldDocumentChecksums))
{
continue;
}
Contract.ThrowIfTrue(oldDocumentChecksums.Checksum == newDocumentChecksums.Checksum);
var document = project.GetDocument(documentId) ?? project.GetAdditionalDocument(documentId) ?? project.GetAnalyzerConfigDocument(documentId);
Contract.ThrowIfNull(document);
project = await UpdateDocumentAsync(document, oldDocumentChecksums, newDocumentChecksums, cancellationToken).ConfigureAwait(false);
}
// removed document
ImmutableArray <DocumentId> .Builder?lazyDocumentsToRemove = null;
foreach (var(documentId, _) in oldMap)
{
if (!newMap.ContainsKey(documentId))
{
// we have a document removed
lazyDocumentsToRemove ??= ImmutableArray.CreateBuilder <DocumentId>();
lazyDocumentsToRemove.Add(documentId);
}
}
if (lazyDocumentsToRemove is not null)
{
project = removeDocuments(project.Solution, lazyDocumentsToRemove.ToImmutable()).GetProject(project.Id) !;
}
return(project);
}