bool TryStartSession(char c, bool isDelete) {
if (HasSession)
return false;
var info = CompletionInfo.Create(textView.TextSnapshot);
if (info == null)
return false;
int pos = textView.Caret.Position.BufferPosition.Position;
var completionTrigger = isDelete ? CompletionTrigger.CreateDeletionTrigger(c) : CompletionTrigger.CreateInsertionTrigger(c);
if (!info.Value.CompletionService.ShouldTriggerCompletion(info.Value.SourceText, pos, completionTrigger))
return false;
StartSession(info, completionTrigger);
return HasSession;
}
public void Commit(RoslynCompletion completion)
{
if (completion == null)
{
throw new ArgumentNullException(nameof(completion));
}
mruCompletionService.AddText(completion.DisplayText);
var info = CompletionInfo.Create(ApplicableTo.TextBuffer.CurrentSnapshot);
Debug.Assert(info != null);
if (info == null)
{
return;
}
var change = completionService.GetChangeAsync(info.Value.Document, completion.CompletionItem, commitCharacter: null).GetAwaiter().GetResult();
var buffer = ApplicableTo.TextBuffer;
var currentSnapshot = buffer.CurrentSnapshot;
using (var ed = buffer.CreateEdit()) {
foreach (var c in change.TextChanges)
{
Debug.Assert(c.Span.End <= originalSnapshot.Length);
if (c.Span.End > originalSnapshot.Length)
{
return;
}
var span = new SnapshotSpan(originalSnapshot, c.Span.ToSpan()).TranslateTo(currentSnapshot, SpanTrackingMode.EdgeInclusive);
if (!ed.Replace(span.Span, c.NewText))
{
return;
}
}
ed.Apply();
}
if (change.NewPosition != null)
{
var snapshot = buffer.CurrentSnapshot;
Debug.Assert(change.NewPosition.Value <= snapshot.Length);
if (change.NewPosition.Value <= snapshot.Length)
{
textView.Caret.MoveTo(new SnapshotPoint(snapshot, change.NewPosition.Value));
textView.Caret.EnsureVisible();
}
}
}
/// <summary>
/// Gets the description or null if none
/// </summary>
/// <param name="completion">Completion</param>
/// <param name="cancellationToken">Cancellation token</param>
/// <returns></returns>
public Task <CompletionDescription> GetDescriptionAsync(RoslynCompletion completion, CancellationToken cancellationToken = default(CancellationToken))
{
if (completion == null)
{
throw new ArgumentNullException(nameof(completion));
}
var info = CompletionInfo.Create(textView.TextSnapshot);
if (info == null)
{
return(Task.FromResult <CompletionDescription>(null));
}
return(completionService.GetDescriptionAsync(info.Value.Document, completion.CompletionItem, cancellationToken));
}
public void AugmentCompletionSession(ICompletionSession session, IList <CompletionSet> completionSets)
{
var snapshot = session.TextView.TextSnapshot;
var triggerPoint = session.GetTriggerPoint(snapshot);
if (triggerPoint == null)
{
return;
}
var info = CompletionInfo.Create(snapshot);
if (info == null)
{
return;
}
// This helps a little to speed up the code
ProfileOptimizationHelper.StartProfile("roslyn-completion-" + info.Value.CompletionService.Language);
CompletionTrigger completionTrigger;
session.Properties.TryGetProperty(typeof(CompletionTrigger), out completionTrigger);
var completionList = info.Value.CompletionService.GetCompletionsAsync(info.Value.Document, triggerPoint.Value.Position, completionTrigger).GetAwaiter().GetResult();
if (completionList == null)
{
return;
}
Debug.Assert(completionList.DefaultSpan.End <= snapshot.Length);
if (completionList.DefaultSpan.End > snapshot.Length)
{
return;
}
var trackingSpan = snapshot.CreateTrackingSpan(completionList.DefaultSpan.Start, completionList.DefaultSpan.Length, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
var completionSet = RoslynCompletionSet.Create(imageMonikerService, mruCompletionService, completionList, info.Value.CompletionService, session.TextView, DefaultCompletionSetMoniker, dnSpy_Roslyn_Shared_Resources.CompletionSet_All, trackingSpan);
completionSets.Add(completionSet);
}
public void AugmentCompletionSession(ICompletionSession session, IList <CompletionCollection> completionCollections)
{
var snapshot = session.TextView.TextSnapshot;
var triggerPoint = session.GetTriggerPoint(snapshot);
if (triggerPoint == null)
{
return;
}
var info = CompletionInfo.Create(snapshot);
if (info == null)
{
return;
}
CompletionTrigger completionTrigger;
session.Properties.TryGetProperty(typeof(CompletionTrigger), out completionTrigger);
var completionList = info.Value.CompletionService.GetCompletionsAsync(info.Value.Document, triggerPoint.Value.Position, completionTrigger).GetAwaiter().GetResult();
if (completionList == null)
{
return;
}
Debug.Assert(completionList.DefaultSpan.End <= snapshot.Length);
if (completionList.DefaultSpan.End > snapshot.Length)
{
return;
}
var trackingSpan = snapshot.CreateTrackingSpan(completionList.DefaultSpan.Start, completionList.DefaultSpan.Length, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
var completionCollection = RoslynCompletionCollection.Create(completionList, info.Value.CompletionService, session.TextView, trackingSpan);
completionCollections.Add(completionCollection);
}
CompletionService TryGetRoslynCompletionService() => CompletionInfo.Create(textView.TextSnapshot)?.CompletionService;