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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.
#nullable disable
using System.Collections.Generic;
using System.Threading;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Structure;
namespace Microsoft.CodeAnalysis.CSharp.Structure;
internal class CompilationUnitStructureProvider : AbstractSyntaxNodeStructureProvider<CompilationUnitSyntax>
{
protected override void CollectBlockSpans(
SyntaxToken previousToken,
CompilationUnitSyntax compilationUnit,
ArrayBuilder<BlockSpan> spans,
BlockStructureOptions options,
CancellationToken cancellationToken)
{
CSharpStructureHelpers.CollectCommentBlockSpans(compilationUnit, spans, options);
// extern aliases and usings are outlined in a single region
var externsAndUsings = new List<SyntaxNode>();
externsAndUsings.AddRange(compilationUnit.Externs);
externsAndUsings.AddRange(compilationUnit.Usings);
externsAndUsings.Sort((node1, node2) => node1.SpanStart.CompareTo(node2.SpanStart));
spans.AddIfNotNull(CSharpStructureHelpers.CreateBlockSpan(
externsAndUsings,
compressEmptyLines: false,
autoCollapse: true,
type: BlockTypes.Imports,
isCollapsible: true,
isDefaultCollapsed: options.CollapseImportsWhenFirstOpened));
if (compilationUnit.Usings.Count > 0 ||
compilationUnit.Externs.Count > 0 ||
compilationUnit.Members.Count > 0 ||
compilationUnit.AttributeLists.Count > 0)
{
CSharpStructureHelpers.CollectCommentBlockSpans(compilationUnit.EndOfFileToken.LeadingTrivia, spans);
}
}
}
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