Add example and logic for inline applies to

Author: theletterf

docs/syntax/applies.md

@@ -268,7 +268,7 @@ observability: deprecated 9.0.0
 
 ### Inline
 
-#### In text
+#### In text {applies_to}`serverless: `
 
 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas ut libero diam. Mauris sed eleifend erat,
 sit amet auctor odio. Donec ac placerat nunc. {applies_to}`stack: preview` Aenean scelerisque viverra lectus

src/Elastic.Markdown/Myst/InlineParsers/HeadingBlockWithSlugParser.cs

@@ -29,18 +29,29 @@ public void Setup(MarkdownPipelineBuilder pipeline) =>
 	public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer) { }
 }
 
-public class HeadingBlockWithSlugParser : HeadingBlockParser
+public partial class HeadingBlockWithSlugParser : HeadingBlockParser
 {
 	private static readonly Regex IconSyntax = IconParser.IconRegex();
+	private static readonly Regex AppliesToSyntax = AppliesToSyntaxRegex();
+
+	private static string StripAppliesToAnnotations(string text)
+	{
+		// Remove applies_to inline annotations from the text
+		return AppliesToSyntax.Replace(text, "").Trim();
+	}
+
+	[GeneratedRegex(@"\{applies_to\}`[^`]*`", RegexOptions.Compiled)]
+	private static partial Regex AppliesToSyntaxRegex();
 
 	public override bool Close(BlockProcessor processor, Block block)
 	{
 		if (block is not HeadingBlock headingBlock)
 			return base.Close(processor, block);
 
 		var text = headingBlock.Lines.Lines[0].Slice.AsSpan();
-		// Remove icon syntax from the heading text
-		var cleanText = IconSyntax.Replace(text.ToString(), "").Trim();
+		// Remove icon syntax and applies_to annotations from the heading text
+		var cleanText = IconSyntax.Replace(text.ToString(), "");
+		cleanText = StripAppliesToAnnotations(cleanText);
 		headingBlock.SetData("header", cleanText);
 
 		if (!HeadingAnchorParser.MatchAnchorLine().IsMatch(text))
@@ -59,8 +70,10 @@ public override bool Close(BlockProcessor processor, Block block)
 			if (header.IndexOf('$') >= 0)
 				anchor = HeadingAnchorParser.MatchAnchor().Replace(anchor.ToString(), "");
 			headingBlock.SetData("anchor", anchor.ToString());
-			// Remove icon syntax from the header text when setting it as data
-			headingBlock.SetData("header", IconSyntax.Replace(header.ToString(), "").Trim());
+			// Remove icon syntax and applies_to annotations from the header text when setting it as data
+			var headerText = IconSyntax.Replace(header.ToString(), "");
+			headerText = StripAppliesToAnnotations(headerText);
+			headingBlock.SetData("header", headerText.Trim());
 			return base.Close(processor, block);
 		}
 

tests/authoring/Inline/AppliesToRole.fs

@@ -162,3 +162,26 @@ If this functionality is unavailable or behaves differently when deployed on ECH
 	</span>
 	element.</p>
 """
+
+type ``strips applies_to annotations from headings in table of contents`` () =
+    static let markdown = Setup.Markdown """
+# Main Title
+
+## Section with applies_to {applies_to}`stack: preview 9.1`
+
+### Another section {applies_to}`serverless: beta`
+
+Some content here.
+"""
+
+    [<Fact>]
+    let ``heading text is stripped of applies_to annotations`` () =
+        let document = markdown |> converts "index.md"
+        let tocItems = document.File.PageTableOfContent.Values |> Seq.toList
+        
+        // Verify that the heading text doesn't contain the applies_to annotations
+        let sectionHeading = tocItems |> List.find (fun item -> item.Heading = "Section with applies_to")
+        let anotherSectionHeading = tocItems |> List.find (fun item -> item.Heading = "Another section")
+        
+        test <@ sectionHeading.Heading = "Section with applies_to" @>
+        test <@ anotherSectionHeading.Heading = "Another section" @>