Add support for code callouts

docs/source/markup/callout.md

@@ -0,0 +1,23 @@
+---
+title: Callouts
+---
+
+You can use the regular markdown code block:
+
+```yaml
+project:
+  title: MyST Markdown 
+  github: https://github.com/jupyter-book/mystmd
+  license:
+    code: MIT
+    content: CC-BY-4.0 <1>
+  subject: MyST Markdown 
+```
+
+
+### C#
+
+```csharp
+var apiKey = new ApiKey("<API_KEY>"); // Set up the api key
+var client = new ElasticsearchClient("<CLOUD_ID>", apiKey); 
+```

docs/source/markup/code.md

@@ -6,7 +6,7 @@ You can use the regular markdown code block:
 
 ```yaml
 project:
-  title: MyST Markdown
+  title: MyST Markdown 
   github: https://github.com/jupyter-book/mystmd
   license:
     code: MIT
@@ -26,13 +26,10 @@ project:
   subject: MyST Markdown
 ```
 
-This page also documents the [code directive](https://mystmd.org/guide/directives). It mentions `code-block` and `sourcecode` as aliases of the `code` directive. But `code-block` seems to behave differently. For example the `caption` option works for `code-block`, but not for `code`.
+For now we only support the `caption` option on the `{code}` or `{code-block}`
 
 ```{code-block} yaml
-:linenos:
 :caption: How to configure `license` of a project
-:name: myst.yml
-:emphasize-lines: 4, 5, 6
 project:
   title: MyST Markdown
   github: https://github.com/jupyter-book/mystmd
@@ -42,15 +39,125 @@ project:
   subject: MyST Markdown
 ```
 
-```{code-block} python
-    :caption: Code blocks can also have sidebars.
-    :linenos:
+## Code Callouts
+
+### YAML
+
+```yaml
+project:
+  title: MyST Markdown #1
+  github: https://github.com/jupyter-book/mystmd
+  license:
+    code: MIT
+    content: CC-BY-4.0
+  subject: MyST Markdown
+```
+
+### Java
+
+```java
+// Create the low-level client
+RestClient restClient = RestClient
+    .builder(HttpHost.create(serverUrl)) //1
+    .setDefaultHeaders(new Header[]{
+        new BasicHeader("Authorization", "ApiKey " + apiKey)
+    })
+    .build();
+```
+
+### Javascript
+
+```javascript
+const { Client } = require('@elastic/elasticsearch')
+const client = new Client({
+  cloud: {
+    id: '<cloud-id>' //1
+  },
+  auth: {
+    username: 'elastic',
+    password: 'changeme'
+  }
+})
+```
+
+### Ruby
+
+```ruby
+require 'elasticsearch'
+
+client = Elasticsearch::Client.new(
+  cloud_id: '<CloudID>'
+  user: '<Username>', #1
+  password: '<Password>',
+)
+```
+
+### Go
+
+```go
+cfg := elasticsearch.Config{
+        CloudID: "CLOUD_ID", //1
+        APIKey: "API_KEY"
+}
+es, err := elasticsearch.NewClient(cfg)
+```
+
+### C#
 
-    print("one")
-    print("two")
-    print("three")
-    print("four")
-    print("five")
-    print("six")
-    print("seven")
+```csharp
+var apiKey = new ApiKey("<API_KEY>"); //1
+var client = new ElasticsearchClient("<CLOUD_ID>", apiKey); 
 ```
+
+### PHP
+
+```php
+$hosts = [
+    '192.168.1.1:9200',         //1
+    '192.168.1.2',              // Just IP
+    'mydomain.server.com:9201', // Domain + Port
+    'mydomain2.server.com',     // Just Domain
+    'https://localhost',        // SSL to localhost
+    'https://192.168.1.3:9200'  // SSL to IP + Port
+];
+$client = ClientBuilder::create()           // Instantiate a new ClientBuilder
+                    ->setHosts($hosts)      // Set the hosts
+                    ->build();              // Build the client object
+```
+
+### Perl
+
+```perl
+my $e = Search::Elasticsearch->new( #1
+    nodes => [ 'https://my-test.es.us-central1.gcp.cloud.es.io' ],
+    elastic_cloud_api_key => 'insert here the API Key'
+);
+```
+### Python
+
+```python
+from elasticsearch import Elasticsearch
+
+ELASTIC_PASSWORD = "<password>" #1
+
+# Found in the 'Manage Deployment' page
+CLOUD_ID = "deployment-name:dXMtZWFzdDQuZ2Nw..."
+
+# Create the client instance
+client = Elasticsearch(
+    cloud_id=CLOUD_ID,
+    basic_auth=("elastic", ELASTIC_PASSWORD)
+)
+
+# Successful response!
+client.info()
+# {'name': 'instance-0000000000', 'cluster_name': ...}
+```
+### Rust
+
+```rust
+let url = Url::parse("https://example.com")?; //1
+let conn_pool = SingleNodeConnectionPool::new(url);
+let transport = TransportBuilder::new(conn_pool).disable_proxy().build()?;
+let client = Elasticsearch::new(transport);
+```

src/Elastic.Markdown/Diagnostics/ProcessorDiagnosticExtensions.cs

@@ -97,7 +97,7 @@ public static void EmitWarning(this BuildContext context, IFileInfo file, string
 		context.Collector.Channel.Write(d);
 	}
 
-	public static void EmitError(this DirectiveBlock block, string message, Exception? e = null)
+	public static void EmitError(this IBlockExtension block, string message, Exception? e = null)
 	{
 		if (block.SkipValidation) return;
 
@@ -107,13 +107,13 @@ public static void EmitError(this DirectiveBlock block, string message, Exceptio
 			File = block.CurrentFile.FullName,
 			Line = block.Line + 1,
 			Column = block.Column,
-			Length = block.Directive.Length + 5,
+			Length = block.OpeningLength + 5,
 			Message = message + (e != null ? Environment.NewLine + e : string.Empty),
 		};
 		block.Build.Collector.Channel.Write(d);
 	}
 
-	public static void EmitWarning(this DirectiveBlock block, string message)
+	public static void EmitWarning(this IBlockExtension block, string message)
 	{
 		if (block.SkipValidation) return;
 
@@ -123,7 +123,7 @@ public static void EmitWarning(this DirectiveBlock block, string message)
 			File = block.CurrentFile.FullName,
 			Line = block.Line + 1,
 			Column = block.Column,
-			Length = block.Directive.Length + 4,
+			Length = block.OpeningLength + 4,
 			Message = message
 		};
 		block.Build.Collector.Channel.Write(d);

src/Elastic.Markdown/Myst/CodeBlocks/CallOut.cs

@@ -0,0 +1,16 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+namespace Elastic.Markdown.Myst.CodeBlocks;
+
+public record CallOut
+{
+	public required int Index { get; init; }
+	public required string Text { get; init; }
+	public required bool InlineCodeAnnotation { get; init; }
+
+	public required int SliceStart { get; init; }
+
+	public required int Line { get; init; }
+}

src/Elastic.Markdown/Myst/CodeBlocks/CallOutParser.cs

@@ -0,0 +1,19 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using System.Text.RegularExpressions;
+
+namespace Elastic.Markdown.Myst.CodeBlocks;
+
+public static partial class CallOutParser
+{
+	[GeneratedRegex(@"^.+\S+.*?\s<\d+>$", RegexOptions.IgnoreCase, "en-US")]
+	public static partial Regex CallOutNumber();
+
+	[GeneratedRegex(@"^.+\S+.*?\s(?:\/\/|#)\s[^""]+$", RegexOptions.IgnoreCase, "en-US")]
+	public static partial Regex MathInlineAnnotation();
+
+	[GeneratedRegex(@"\{\{[^\r\n}]+?\}\}", RegexOptions.IgnoreCase, "en-US")]
+	public static partial Regex MatchSubstitutions();
+}

src/Elastic.Markdown/Myst/CodeBlocks/EnhancedCodeBlock.cs

@@ -0,0 +1,28 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using System.IO.Abstractions;
+using Elastic.Markdown.Myst.Directives;
+using Markdig.Parsers;
+using Markdig.Syntax;
+
+namespace Elastic.Markdown.Myst.CodeBlocks;
+
+public class EnhancedCodeBlock(BlockParser parser, ParserContext context)
+	: FencedCodeBlock(parser), IBlockExtension
+{
+	public BuildContext Build { get; } = context.Build;
+
+	public IFileInfo CurrentFile { get; } = context.Path;
+
+	public bool SkipValidation { get; } = context.SkipValidation;
+
+	public int OpeningLength => Info?.Length ?? 0 + 3;
+
+	public List<CallOut>? CallOuts { get; set; }
+
+	public bool InlineAnnotations { get; set; }
+
+	public string Language { get; set; } = "unknown";
+}

src/Elastic.Markdown/Myst/CodeBlocks/EnhancedCodeBlockHtmlRenderer.cs

@@ -0,0 +1,97 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using Elastic.Markdown.Diagnostics;
+using Elastic.Markdown.Myst.Directives;
+using Elastic.Markdown.Slices.Directives;
+using Markdig.Renderers;
+using Markdig.Renderers.Html;
+using Markdig.Syntax;
+using RazorSlices;
+
+namespace Elastic.Markdown.Myst.CodeBlocks;
+
+public class EnhancedCodeBlockHtmlRenderer : HtmlObjectRenderer<EnhancedCodeBlock>
+{
+
+	private static void RenderRazorSlice<T>(RazorSlice<T> slice, HtmlRenderer renderer, EnhancedCodeBlock block)
+	{
+		var html = slice.RenderAsync().GetAwaiter().GetResult();
+		var blocks = html.Split("[CONTENT]", 2, StringSplitOptions.RemoveEmptyEntries);
+		renderer.Write(blocks[0]);
+		renderer.WriteLeafRawLines(block, true, false, false);
+		renderer.Write(blocks[1]);
+	}
+	protected override void Write(HtmlRenderer renderer, EnhancedCodeBlock block)
+	{
+		var callOuts = block.CallOuts ?? [];
+
+		var slice = Code.Create(new CodeViewModel
+		{
+			CrossReferenceName = string.Empty,// block.CrossReferenceName,
+			Language = block.Language,
+			Caption = string.Empty
+		});
+
+		RenderRazorSlice(slice, renderer, block);
+
+		if (!block.InlineAnnotations && callOuts.Count > 0)
+		{
+			var index = block.Parent!.IndexOf(block);
+			if (index == block.Parent!.Count - 1)
+				block.EmitError("Code block with annotations is not followed by any content, needs numbered list");
+			else
+			{
+				var siblingBlock = block.Parent[index + 1];
+				if (siblingBlock is not ListBlock)
+					block.EmitError("Code block with annotations is not followed by a list");
+				if (siblingBlock is ListBlock l && l.Count != callOuts.Count)
+				{
+					block.EmitError(
+						$"Code block has {callOuts.Count} callouts but the following list only has {l.Count}");
+				}
+				else if (siblingBlock is ListBlock listBlock)
+				{
+					block.Parent.Remove(listBlock);
+					renderer.WriteLine("<ol class=\"code-callouts\">");
+					foreach (var child in listBlock)
+					{
+						var listItem = (ListItemBlock)child;
+						var previousImplicit = renderer.ImplicitParagraph;
+						renderer.ImplicitParagraph = !listBlock.IsLoose;
+
+						renderer.EnsureLine();
+						if (renderer.EnableHtmlForBlock)
+						{
+							renderer.Write("<li");
+							renderer.WriteAttributes(listItem);
+							renderer.Write('>');
+						}
+
+						renderer.WriteChildren(listItem);
+
+						if (renderer.EnableHtmlForBlock)
+							renderer.WriteLine("</li>");
+
+						renderer.EnsureLine();
+						renderer.ImplicitParagraph = previousImplicit;
+					}
+					renderer.WriteLine("</ol>");
+				}
+			}
+		}
+		else if (block.InlineAnnotations)
+		{
+			renderer.WriteLine("<ol class=\"code-callouts\">");
+			foreach (var c in block.CallOuts ?? [])
+			{
+				renderer.WriteLine("<li>");
+				renderer.WriteLine(c.Text);
+				renderer.WriteLine("</li>");
+			}
+
+			renderer.WriteLine("</ol>");
+		}
+	}
+}