65 lines
2.3 KiB
C#
65 lines
2.3 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System.Linq;
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using Microsoft.AspNetCore.Razor.Evolution.Legacy;
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namespace Microsoft.AspNetCore.Razor.Evolution
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{
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internal class DefaultDirectiveSyntaxTreePass : IRazorSyntaxTreePass
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{
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public RazorEngine Engine { get; set; }
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public int Order => 75;
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public RazorSyntaxTree Execute(RazorCodeDocument codeDocument, RazorSyntaxTree syntaxTree)
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{
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var errorSink = new ErrorSink();
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var sectionVerifier = new NestedSectionVerifier();
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sectionVerifier.Verify(syntaxTree, errorSink);
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if (errorSink.Errors.Count > 0)
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{
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// Temporary code while we're still using legacy diagnostics in the SyntaxTree.
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var errors = errorSink.Errors.Select(error => RazorDiagnostic.Create(error));
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var combinedErrors = syntaxTree.Diagnostics.Concat(errors);
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syntaxTree = RazorSyntaxTree.Create(syntaxTree.Root, syntaxTree.Source, combinedErrors, syntaxTree.Options);
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}
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return syntaxTree;
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}
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private class NestedSectionVerifier : ParserVisitor
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{
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private int _nestedLevel;
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private ErrorSink _errorSink;
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public void Verify(RazorSyntaxTree tree, ErrorSink errorSink)
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{
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_errorSink = errorSink;
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tree.Root.Accept(this);
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}
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public override void VisitDirectiveBlock(DirectiveChunkGenerator chunkGenerator, Block block)
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{
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if (_nestedLevel > 0)
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{
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var directiveStart = block.Children.First(child => !child.IsBlock && ((Span)child).Kind == SpanKind.Transition).Start;
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var errorLength = /* @ */ 1 + CSharpCodeParser.SectionDirectiveDescriptor.Name.Length;
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_errorSink.OnError(
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directiveStart,
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LegacyResources.FormatParseError_Sections_Cannot_Be_Nested(LegacyResources.SectionExample_CS),
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errorLength);
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}
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_nestedLevel++;
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VisitDefault(block);
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_nestedLevel--;
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}
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}
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}
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}
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