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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Composition;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Editor;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.ExternalAccess.FSharp.Editor;
using Microsoft.CodeAnalysis.ExternalAccess.FSharp.Navigation;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Notification;
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.ExternalAccess.FSharp.Internal.Editor
{
[Shared]
[ExportLanguageService(typeof(INavigationBarItemService), LanguageNames.FSharp)]
internal class FSharpNavigationBarItemService : INavigationBarItemService
{
private readonly IThreadingContext _threadingContext;
private readonly IFSharpNavigationBarItemService _service;
[ImportingConstructor]
[Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
public FSharpNavigationBarItemService(
IThreadingContext threadingContext,
IFSharpNavigationBarItemService service)
{
_threadingContext = threadingContext;
_service = service;
}
public Task<ImmutableArray<NavigationBarItem>> GetItemsAsync(Document document, ITextVersion textVersion, CancellationToken cancellationToken)
{
return ((INavigationBarItemService)this).GetItemsAsync(
document, workspaceSupportsDocumentChanges: true, frozenPartialSemantics: false, textVersion, cancellationToken);
}
async Task<ImmutableArray<NavigationBarItem>> INavigationBarItemService.GetItemsAsync(
Document document,
bool workspaceSupportsDocumentChanges,
bool forceFrozenPartialSemanticsForCrossProcessOperations,
ITextVersion textVersion,
CancellationToken cancellationToken)
{
var items = await _service.GetItemsAsync(document, cancellationToken).ConfigureAwait(false);
return items == null
? ImmutableArray<NavigationBarItem>.Empty
: ConvertItems(items, textVersion);
}
private static ImmutableArray<NavigationBarItem> ConvertItems(IList<FSharpNavigationBarItem> items, ITextVersion textVersion)
=> (items ?? SpecializedCollections.EmptyList<FSharpNavigationBarItem>()).Where(x => x.Spans.Any()).SelectAsArray(x => ConvertToNavigationBarItem(x, textVersion));
public async Task<bool> TryNavigateToItemAsync(
Document document, NavigationBarItem item, ITextView view, ITextVersion textVersion, CancellationToken cancellationToken)
{
// The logic here was ported from FSharp's implementation. The main reason was to avoid shimming INotificationService.
// Spans.First() is safe here as we filtered down to only items that have spans in ConvertItems.
var span = item.GetCurrentItemSpan(textVersion, item.Spans.First());
var workspace = document.Project.Solution.Workspace;
var navigationService = workspace.Services.GetRequiredService<IFSharpDocumentNavigationService>();
await _threadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
if (navigationService.CanNavigateToPosition(workspace, document.Id, span.Start, virtualSpace: 0, cancellationToken))
{
navigationService.TryNavigateToPosition(workspace, document.Id, span.Start, virtualSpace: 0, cancellationToken);
}
else
{
var notificationService = workspace.Services.GetRequiredService<INotificationService>();
notificationService.SendNotification(EditorFeaturesResources.The_definition_of_the_object_is_hidden, severity: NotificationSeverity.Error);
}
return true;
}
public bool ShowItemGrayedIfNear(NavigationBarItem item)
{
return false;
}
private static NavigationBarItem ConvertToNavigationBarItem(FSharpNavigationBarItem item, ITextVersion textVersion)
{
var spans = item.Spans.ToImmutableArrayOrEmpty();
return new SimpleNavigationBarItem(
textVersion,
item.Text,
FSharpGlyphHelpers.ConvertTo(item.Glyph),
spans,
ConvertItems(item.ChildItems, textVersion),
item.Indent,
item.Bolded,
item.Grayed);
}
}
}
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