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Add syntax highlighting of ignored directives #78458

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Merged
merged 6 commits into from
May 8, 2025
Merged

Add syntax highlighting of ignored directives #78458

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9e5ebf0
Fix PPKeyword text that appears in failed tests
jjonescz May 5, 2025
81ff498
Add basic syntax highlighting
jjonescz May 5, 2025
a250fb0
Split classification if possible
jjonescz May 6, 2025
0d911c9
Allow any white space
jjonescz May 6, 2025
6be720a
Simplify
jjonescz May 7, 2025
b43fd2d
Simplify further
jjonescz May 7, 2025
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79 changes: 79 additions & 0 deletions src/EditorFeatures/CSharpTest/Classification/SyntacticClassifierTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1542,6 +1542,85 @@ public async Task ShebangNotAsFirstCommentInScript(TestHost testHost)
await TestAsync(code, code, testHost, Options.Script, expected);
}

[Theory, CombinatorialData]
public async Task IgnoredDirective_01(TestHost testHost)
{
await TestAsync("""
#:unknown // comment
Console.Write();
""",
testHost,
PPKeyword("#"),
PPKeyword(":"),
PPKeyword("unknown"),
String(" // comment"),
Identifier("Console"),
Operators.Dot,
Identifier("Write"),
Punctuation.OpenParen,
Punctuation.CloseParen,
Punctuation.Semicolon);
}

[Theory, CombinatorialData]
public async Task IgnoredDirective_02(TestHost testHost)
{
await TestAsync("""
#:sdk Test 2.1.0
Console.Write();
""",
testHost,
PPKeyword("#"),
PPKeyword(":"),
PPKeyword("sdk"),
String(" Test 2.1.0"),
Identifier("Console"),
Operators.Dot,
Identifier("Write"),
Punctuation.OpenParen,
Punctuation.CloseParen,
Punctuation.Semicolon);
}

[Theory, CombinatorialData]
public async Task IgnoredDirective_03(TestHost testHost)
{
await TestAsync("""
#:no-space
Console.Write();
""",
testHost,
PPKeyword("#"),
PPKeyword(":"),
PPKeyword("no-space"),
Identifier("Console"),
Operators.Dot,
Identifier("Write"),
Punctuation.OpenParen,
Punctuation.CloseParen,
Punctuation.Semicolon);
}

[Theory, CombinatorialData]
public async Task IgnoredDirective_04(TestHost testHost)
{
await TestAsync($"""
#:sdk{'\t'}Test 2.1.0
Console.Write();
""",
testHost,
PPKeyword("#"),
PPKeyword(":"),
PPKeyword("sdk"),
String("\tTest 2.1.0"),
Identifier("Console"),
Operators.Dot,
Identifier("Write"),
Punctuation.OpenParen,
Punctuation.CloseParen,
Punctuation.Semicolon);
}

[Theory, CombinatorialData]
public async Task CommentAsMethodBodyContent(TestHost testHost)
{
Expand Down
3 changes: 3 additions & 0 deletions src/EditorFeatures/TestUtilities/Classification/FormattedClassification.cs
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Expand Up @@ -202,6 +202,9 @@ public override string ToString()
case "string - escape character":
return $"Escape(\"{Text}\")";

case "preprocessor keyword":
return $"""{nameof(FormattedClassifications.PPKeyword)}("{Text}")""";

default:
var trimmedClassification = ClassificationName;
if (trimmedClassification.EndsWith(" name"))
Expand Down
1 change: 1 addition & 0 deletions src/Workspaces/CSharp/Portable/Classification/Worker.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -249,6 +249,7 @@ private void ClassifyTrivia(SyntaxTrivia trivia, SyntaxTriviaList triviaList)
case SyntaxKind.PragmaChecksumDirectiveTrivia:
case SyntaxKind.ReferenceDirectiveTrivia:
case SyntaxKind.LoadDirectiveTrivia:
case SyntaxKind.IgnoredDirectiveTrivia:
case SyntaxKind.NullableDirectiveTrivia:
case SyntaxKind.BadDirectiveTrivia:
ClassifyPreprocessorDirective((DirectiveTriviaSyntax)trivia.GetStructure()!);
Expand Down
27 changes: 27 additions & 0 deletions src/Workspaces/CSharp/Portable/Classification/Worker_Preprocesser.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@

using Microsoft.CodeAnalysis.Classification;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;

namespace Microsoft.CodeAnalysis.CSharp.Classification;

Expand Down Expand Up @@ -69,6 +70,9 @@ private void ClassifyPreprocessorDirective(DirectiveTriviaSyntax node)
case SyntaxKind.LoadDirectiveTrivia:
ClassifyLoadDirective((LoadDirectiveTriviaSyntax)node);
break;
case SyntaxKind.IgnoredDirectiveTrivia:
ClassifyIgnoredDirective((IgnoredDirectiveTriviaSyntax)node);
break;
case SyntaxKind.NullableDirectiveTrivia:
ClassifyNullableDirective((NullableDirectiveTriviaSyntax)node);
break;
Expand Down Expand Up @@ -324,6 +328,29 @@ private void ClassifyLoadDirective(LoadDirectiveTriviaSyntax node)
ClassifyDirectiveTrivia(node);
}

private void ClassifyIgnoredDirective(IgnoredDirectiveTriviaSyntax node)
{
AddClassification(node.HashToken, ClassificationTypeNames.PreprocessorKeyword);
AddClassification(node.ColonToken, ClassificationTypeNames.PreprocessorKeyword);

// The first part (separated by whitespace) of content is a "keyword", e.g., 'sdk' in '#:sdk Test'.
// We only recognize some whitespace characters here for simplicity and performance.
if (node.Content.Text.IndexOfAny([' ', '\t']) is > 0 and var firstSpaceIndex)
{
var keywordSpan = new TextSpan(node.Content.SpanStart, firstSpaceIndex);
var stringLiteralSpan = TextSpan.FromBounds(node.Content.SpanStart + firstSpaceIndex, node.Content.FullSpan.End);
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Was there a reason we're classifying the whitespace character?

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Primarily simplicity. We didn't see any harm in it. The entire line is free form anyways. So there might be many spaces. Easiest to just classify these chunks.

Thoughts?


AddClassification(keywordSpan, ClassificationTypeNames.PreprocessorKeyword);
AddClassification(stringLiteralSpan, ClassificationTypeNames.StringLiteral);
}
else
{
AddClassification(node.Content, ClassificationTypeNames.PreprocessorKeyword);
}

ClassifyDirectiveTrivia(node);
}

private void ClassifyNullableDirective(NullableDirectiveTriviaSyntax node)
{
AddClassification(node.HashToken, ClassificationTypeNames.PreprocessorKeyword);
Expand Down
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