Can source line numbers appear in the rendered output? #633

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claunia · 2026-01-29T14:41:35Z

claunia commented

2026-01-29 14:41:35 +00:00

Originally created by @deanebarker on GitHub (Oct 6, 2023).

Is there any support or extension in MarkDig for corresponding output elements with the line number from the source? This would allow finding the correct line in the source from the output (i.e. -- synchronizing scrolling of source or output elements when doing side-by-side editing).

For example:

# Heading

This is some text.

Theoretical output:

<h1 data-line-number="1">Heading</h1>
<p data-line-number="3">This is some text.</p>

That's just an illustration -- I'm curious if there's anything in the library or extensions that does something similar to the example.

Originally created by @deanebarker on GitHub (Oct 6, 2023). Is there any support or extension in MarkDig for corresponding output elements with the line number from the source? This would allow finding the correct line in the source from the output (i.e. -- synchronizing scrolling of source or output elements when doing side-by-side editing). For example: ``` # Heading This is some text. ``` Theoretical output: ``` <h1 data-line-number="1">Heading</h1> <p data-line-number="3">This is some text.</p> ``` That's just an illustration -- I'm curious if there's anything in the library or extensions that does something similar to the example.

claunia added the question label 2026-01-29 14:41:35 +00:00

claunia closed this issue

2026-01-29 14:41:36 +00:00

claunia commented

2026-01-29 14:41:37 +00:00

@xoofx commented on GitHub (Oct 6, 2023):

There is the pipeline.UsePragmaLines() extension

This is what the Markdown Editor for Visual Studio is using for example here

@xoofx commented on GitHub (Oct 6, 2023): There is the [`pipeline.UsePragmaLines()` extension](https://github.com/xoofx/markdig/blob/master/src/Markdig/Extensions/PragmaLines/PragmaLineExtension.cs) This is what the Markdown Editor for Visual Studio is using for example [here](https://github.com/madskristensen/MarkdownEditor/blob/a4484fbbd92c3b691cb3d3408832462e2f6edde8/src/MarkdownEditor.Shared/Parsing/MarkdownFactory.cs#L24)

claunia commented

2026-01-29 14:41:38 +00:00

@deanebarker commented on GitHub (Oct 6, 2023):

Perfect. I suspected that it existed, but I couldn't find it (TIL: what "pragma" means). Thank you.

@deanebarker commented on GitHub (Oct 6, 2023): Perfect. I suspected that it existed, but I couldn't find it (TIL: what "pragma" means). Thank you.

claunia commented

2026-01-29 14:41:40 +00:00

@deanebarker commented on GitHub (Oct 6, 2023):

For anyone following this, here's what UsePragmaLines() returns for the example above (clearly, it's 0-based):

<h1 id="pragma-line-0">Heading</h1>
<p id="pragma-line-2">This is some text.</p>

@deanebarker commented on GitHub (Oct 6, 2023): For anyone following this, here's what `UsePragmaLines()` returns for the example above (clearly, it's 0-based): ``` <h1 id="pragma-line-0">Heading</h1> <p id="pragma-line-2">This is some text.</p> ```

claunia referenced this issue

2026-01-29 14:50:39 +00:00

[PR #633] Use Type.GetTypeHandle in RendererBase #1158

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Reference: starred/markdig#633